JP2005265012A - Vacuum insulation and folding cooler - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum heat insulating material which does not damage another member abutting on the vacuum heat insulating material, and a folding type cold insulating container improving durability and a cold insulating property by using the vacuum heat insulating material. <P>SOLUTION: A board-shaped core material 32 is covered by covering a jacket material 33 having a gas barrier property, and a vacuum heat insulating material body 31 reducing the pressure of the jacket material 33 and vacuum sealing that is covered by a storage bag 36, thereby forming the vacuum heat insulating material 5. Fin portions 33a to 33c on a peripheral edge of the jacket material 33 are folded and piled on a surface of the jacket material 33 corresponding to an involved part of the core material 32, and a pair or all of the vacuum heat insulating material body 31 on which the fin portions 33a to 33c are folded and piled is covered by the storage bag 36. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vacuum heat insulating material and a foldable cold insulation container using the same.

  In recent years, with the spread of frozen foods and the like, the delivery of frozen products that require cold storage is increasing. Such delivery is generally performed by dividing into large-volume delivery from a factory of frozen goods to a wholesaler (distribution center) and small-scale delivery from a wholesaler to a supermarket or a convenience store.

  By the way, in small-lot delivery in which frozen goods are delivered from a wholesaler to a market, a convenience store, etc., the frozen goods are distinguished for each delivery destination and stored in a cool container.

  2. Description of the Related Art Conventionally, as a cold container, a container that uses a simple heat insulating material such as foamed polystyrene or rigid foamed urethane foam and opens and closes a lid using a chuck, a hook-and-loop fastener, or the like is often used. However, since such a cold insulating container has a high initial thermal conductivity of the heat insulating material and is inferior in the cold insulating performance, a vacuum heat insulating material with excellent heat insulating properties has been developed to provide a cold insulating container with improved cold insulating performance.

  Patent Document 1 discloses such a vacuum heat insulating material.

  As shown in FIGS. 14A and 14B, the vacuum heat insulating material 100 disclosed in Patent Document 1 is formed by superposing two outer cover materials 101 and 101 made of a laminated film material having gas barrier properties. Three sides are sealed, and a heat insulating core material (core material) 102 is inserted between the jacket materials 101 and 101. Then, the inside of the jacket materials 101, 101 is formed by sealing and vacuum-sealing the remaining one while reducing the pressure.

The heat insulating performance of the vacuum heat insulating material 100 disclosed in Patent Document 1 is significantly higher than that of a conventional heat insulating material because the inside of the jacket material 101 is maintained in a vacuum state. Therefore, by adopting the vacuum heat insulating material 100 disclosed in Patent Document 1 for a cold insulation container or the like, a cold insulation container with improved cold insulation performance can be obtained.
JP 2003-172493 A

  Incidentally, in the vacuum heat insulating material 100 disclosed in Patent Document 1, seal portions (fin portions) 103 are formed on the peripheral edges of the outer cover material 101 as shown in FIG. In particular, the fin portion 103 to be sealed last is longer than the other fin portions 103 due to the manufacturing convenience of sealing the inside of the jacket material 101 while reducing the pressure.

  The jacket material 101 is formed of, for example, a laminate film in which a heat welding layer and a protective layer are laminated on an aluminum foil or stainless steel foil having gas barrier properties. For this reason, although the jacket material 101 itself has flexibility, the fin part 103 formed by joining the jacket materials 101 has considerable rigidity and strength.

  For this reason, in the cold storage container having the structure in which the vacuum heat insulating material 100 is included in the sheet material, the fin portion 103 of the vacuum heat insulating material 100 repeatedly rubs against the sheet material with use, and the sheet material is broken. It was easy.

  In view of this, there is a case in which the heat insulating area (coverage) is increased while the damage of the sheet material is prevented by bending the fin portion 103 that does not contribute to heat insulation.

  That is, as shown in FIGS. 15A and 15B, the fin portions 103, 103 along the longitudinal both side edges of the vacuum heat insulating material 100 are folded over to the enclosing portion of the core material 102 and fixed with the tape 104. Preliminary processing is performed in which the fins 103 and 103 at both ends are folded over to the encapsulated portion of the core member 102 and stopped by the tape 104. In some cases, a pre-processed vacuum heat insulating material 100 is inserted into the sheet material of the cold container.

  However, in the cold storage container having such a configuration, the four corners 103b of the vacuum heat insulating material 100 are bent at substantially right angles with the fins 103 overlapped, and the four corners 103b rub against the sheet material and break through the sheet material. Such troubles were likely to occur. Further, the tape 104 to which the fin portion 103 is fixed is deteriorated and peeled off due to long-term use, and the fin portion 103 is lifted and the corner portion 103a of the fin portion 103 is easily rubbed and broken by the sheet material.

  This invention is proposed in view of the above situation, and it aims at providing the vacuum heat insulating material which prevented the damage to the other member contact | abutted with a vacuum heat insulating material. The object of the present invention proposed at the same time is to provide a foldable cold insulation container having improved durability and cold insulation using the vacuum heat insulating material.

  In order to achieve the above object, the present invention is formed by covering a board-shaped core material with a jacket material having a gas barrier property, and covering a vacuum heat insulating material body in which the inside of the jacket material is evacuated and vacuum-sealed with a storage bag. The fin portion along the periphery of the outer cover material is folded on the surface of the outer cover material corresponding to the encapsulated portion of the core material, and the vacuum heat insulating material body in which the fin portion is folded It is a vacuum heat insulating material formed by covering part or all with a storage bag.

  Here, the fin part said by this invention refers to the site | part by which a jacket material seal-connects along the periphery of a jacket material.

  Here, since a fin part does not contribute to heat insulation, the area which the fin part which does not contribute to heat insulation occupies can be reduced by bending so that it may be folded up in the inclusion part of a core material. However, when the fin portion along the periphery of the jacket material is bent, the four corners of the vacuum heat insulating material body are bent at a substantially right angle with the adjacent fin portions overlapped, and the corners are sharply pointed. For this reason, if the four corners of the vacuum heat insulating material body repeatedly contact or rub against other members, the other members are likely to be damaged.

  Further, the four corners of the fin portion often have sharp corners, and the bent fin portion tends to lift from the surface of the jacket material in an attempt to return to the state before the bending. For this reason, if a fin part floats up and repeats and abuts against other members and is rubbed, it will damage other members.

  According to the present invention, since the vacuum heat insulating material main body is stored in the storage bag with the fin portion bent, the four corners of the jacket material are covered with the storage bag and are not exposed to the outside. Moreover, even if the bent fin part tries to return to the state before the bending, the storage bag prevents the floating from the jacket material.

  Thereby, even if the vacuum heat insulating material of the present invention is brought into direct contact with another member, the other members are prevented from being damaged by the fins and the four corners of the vacuum heat insulating material body.

  Another embodiment of the present invention is a vacuum heat insulating material formed by covering a board-shaped core material with a jacket material having a gas barrier property, and covering the vacuum heat insulating material body, which is vacuum-sealed by reducing the pressure inside the jacket material. The fin portion along the periphery of the outer cover material is folded on the surface of the outer cover material corresponding to the encapsulated portion of the core material, and at least near the corners of the four corners of the folded fin portion and the fin portion. It is a vacuum heat insulating material formed by covering the corners near the four corners of the folded vacuum heat insulating material main body with a cover material.

  According to the present invention, the cover material covers at least the four corners of the folded fin portion and the four corners of the vacuum heat insulating material body where the fin portion is bent in a state where the fin portion of the jacket material is folded. Is called.

  Therefore, even if the bent fin portion returns to the state before the bending, the cover material prevents the bent fin portion from returning, and the sharp corners of the fin portion are prevented from floating from the jacket material. Further, since the four corners of the vacuum heat insulating material body are covered with the cover material, the sharply sharp four corners do not directly contact other members.

  Thereby, even if the vacuum heat insulating material of the present invention is brought into direct contact with another member, it is possible to prevent the other member from being damaged by the fins and the four corners of the vacuum heat insulating material body.

  Still another aspect of the present invention has four peripheral wall portions, a bottom surface portion, and a lid portion that can be opened and closed, and each portion is made of the vacuum heat insulating material according to any one of claims 1 to 5 as a sheet material. It is a foldable cold storage container that is formed so as to be enclosed and formed into a box by each part when in use, and can be folded by overlapping each part when not in use.

  According to the present invention, the sheet material containing the vacuum heat insulating material and the vacuum heat insulating material main body do not directly contact each other. In other words, as described above, since the vacuum insulation material is provided with a cover material and a storage bag, the sharp and sharp corners of the fins and the vacuum insulation material body are covered with the cover material and the storage bag and directly into the sheet material. Does not touch. Thereby, it is possible to effectively prevent the sheet material from being damaged.

  In particular, according to the present invention, since it is a foldable cold storage container, the vacuum heat insulating material can easily move inside the sheet material when folding or assembling the cold storage container, and the fins and the sharp and sharp four corners of the vacuum heat insulating material main body are It is easy to repeatedly rub and abut against the sheet material. However, since the fins and sharply sharp corners of the vacuum heat insulating material main body are covered with the cover material and the storage bag, it is possible to prevent the sheet material from being damaged in advance.

  According to the vacuum heat insulating material of the present invention, since the fin portion and the sharply pointed portion of the vacuum heat insulating material body are covered with the storage bag or the cover material, it is prevented that the other members enclosing the vacuum heat insulating material are damaged. The Thereby, it is possible to improve the durability while improving the heat insulation performance of the product using the vacuum heat insulating material of the present invention.

  Moreover, according to the folding type cold insulation container of the present invention, by using the above-described vacuum heat insulating material of the present invention, it is possible to prevent damage to the sheet material containing the vacuum heat insulating material, and the heat insulating performance. In addition, the durability can be remarkably improved.

  The vacuum heat insulating material according to claim 1 is formed by covering a board-shaped core material with a jacket material having a gas barrier property, and covering the vacuum heat insulating material main body, which is vacuum-sealed by reducing the pressure inside the jacket material, with a storage bag. The fin portion along the periphery of the outer cover material is folded on the surface of the outer cover material corresponding to the encapsulated portion of the core material, and the vacuum heat insulating material body in which the fin portion is folded A part or the whole is covered with a storage bag.

  According to the present invention, since the vacuum heat insulating material main body is stored in the storage bag with the fin portion bent, the four corners of the vacuum heat insulating material main body are covered with the storage bag and are not exposed to the outside. Moreover, even if the bent fin part tries to return to the state before the bending, the storage bag prevents the floating from the jacket material.

  Thereby, even if the vacuum heat insulating material of the present invention is brought into direct contact with another member, the other member is prevented from being damaged by the fins and the four corners of the vacuum heat insulating material body.

  In the present invention, the storage bag can take various forms.

  For example, a bag with two sheets of material stacked and sewn on three sides and the other side opened, or a bag with two sheets of material overlapped and sewn on two sides, and the other two opened. It can be a bag. Moreover, it is also possible to use a bag formed into a cylindrical shape by stacking two sheet materials and sewing two opposite sides to form a storage bag.

  In the present invention, the storage bag may be configured to cover the entire vacuum heat insulating material body, or may be configured to cover only a part of the vacuum heat insulating material body. In the case of a configuration that covers only a part, for example, it is possible to adopt a configuration in which one or more storage bags are mounted so as to cover the four corners of the vacuum heat insulating material body and the four corners of the fin portion.

  The vacuum heat insulating material according to claim 2 is formed by covering a board-shaped core material with a jacket material having a gas barrier property, and covering the vacuum heat insulating material body in which the inside of the jacket material is decompressed and vacuum-sealed with a cover material. The fins along the peripheral edge of the jacket material are folded on the surface of the jacket material corresponding to the encapsulated portion of the core material, and at least the corners of the four corners of the folded fin parts The vicinity and the corners of the four corners of the vacuum heat insulating material body with the fins folded are covered with a cover material.

  According to the present invention, the cover material covers at least the four corners of the folded fin portion and the four corners of the vacuum heat insulating material body where the fin portion is bent in a state where the fin portion of the jacket material is folded. Is called.

  Therefore, even if the bent fin portion returns to the state before the bending, the cover material prevents the bent fin portion from returning, and the sharp corners of the fin portion are prevented from floating from the jacket material. Further, the four corners of the vacuum heat insulating material main body come into contact with other members via the cover material, and the sharply sharp four corners do not directly come into contact with other members.

  Thereby, even if the vacuum heat insulating material of the present invention is included in another sheet material or the like, the other sheet material is prevented from being damaged by the fins and the four corners of the vacuum heat insulating material body.

  In the present invention, the cover material can be provided so as to cover only the four corners of the folded fin portion and the four corners of the jacket material. In other words, bend the fins one after the other, and cover the four corners of the folded fins and the four corners of the jacket material so that sheet-like cover material is wrapped around both ends of the jacket material Can do.

  Moreover, it is also possible to make it the structure which winds a sheet-like cover material so that the whole jacket material which bent the fin part may be covered.

  A third aspect of the present invention is the vacuum heat insulating material according to the first or second aspect, wherein a temporary fixing member for temporarily fixing a fin portion folded on the surface of the outer jacket material to the outer jacket material is provided. It is said that.

  According to the present invention, the fin portion is prevented from being lifted up by temporarily fixing the fin portion to the surface of the jacket material by the temporary fixing member. Thereby, the vacuum heat insulating material main body bent in the fin part can be easily stored in the storage bag, or the cover material can be easily attached to the vacuum heat insulating material main body bent in the fin part.

  In addition, even if the temporary fixing member is peeled off after storage in the storage bag or after the cover material is attached, the storage bag or cover material covers the fins and jacket material, which may damage other members. Is prevented.

  In the present invention, a tape or an adhesive can be used for the temporary fixing member.

  According to a fourth aspect of the present invention, in the vacuum heat insulating material according to any one of the first to third aspects, the cover material or the storage bag is made of a material having higher flexibility than the jacket material. It is said that.

  According to the present invention, since the cover material and the storage bag have higher flexibility than the jacket material, the cover material and the storage bag function as a cushioning material. As a result, it is possible to effectively prevent the fin part or the sharply pointed portion of the vacuum heat insulating body from being covered with the cover material or the storage bag and directly contacting or rubbing other members, resulting in damage. This can be prevented beforehand.

  According to a fifth aspect of the present invention, in the vacuum heat insulating material according to any one of the first to fourth aspects, the core material is formed by compression-molding a fiber material into a board shape, and the jacket material is a gas barrier property. It is set as the structure formed with the laminated film material which has this.

  According to the present invention, since the inside of the jacket material is in a vacuum state, the heat insulating performance can be significantly improved as compared with the conventional heat insulating material. Thereby, when manufacturing the heat insulating material which has the same heat insulation performance, compared with the conventional heat insulating material, a vacuum heat insulating material can be made thin, and it becomes possible to achieve space saving and weight reduction.

  In the present invention, the core material may be a fiber material such as glass wool that is heat-molded into a board shape using a binder.

  The covering material can be formed by using a laminate film formed by laminating a heat welding layer and a protective layer on the inside and outside of the gas barrier layer. In other words, the jacket material is a metal foil such as aluminum or a film deposited with metal or non-oxide as a gas barrier layer, and a film such as unstretched polypropylene is laminated on the inner surface side of the gas barrier layer as a heat welding layer. In addition, it can be formed using a laminate film in which a film such as nylon or polyethylene terephthalate is laminated as a protective layer on the outer surface side of the gas barrier layer.

  The invention described in claim 6 has four peripheral wall portions, a bottom surface portion, and an openable / closable lid portion, and the peripheral wall portion, the bottom surface portion, and the lid portion are all formed on the sheet material. Formed by enclosing the vacuum heat insulating material according to one item, when used, a box is formed by the peripheral wall, bottom and lid, and when not in use, the peripheral wall, bottom and lid are overlapped and folded. This is a foldable cold storage container that can be configured.

  According to the present invention, a high cold insulation performance can be obtained by using a vacuum heat insulating material. Further, the peripheral wall portion, the bottom surface portion, and the lid portion are all integrally formed by including a flat vacuum heat insulating material in the sheet material. Therefore, it is possible to assemble and fold in a short time without the trouble of removing the vacuum heat insulating material.

  Further, according to the present invention, since the storage bag and the cover material are provided in the vacuum heat insulating material, the sharp and sharp parts of the fin part and the vacuum heat insulating material body are covered with the storage bag and the cover material, and the sheet material of the cold storage container Do not touch directly. Thereby, it can prevent effectively that the sheet | seat material of a cold storage container is damaged by a fin part or a vacuum heat insulating material main body.

  In particular, according to the present invention, since it is a foldable cold storage container, the vacuum heat insulating material easily moves inside the sheet material when the cold storage container is folded or assembled. However, since the fins and sharply pointed parts of the vacuum heat insulating material body are covered with the storage bag or cover material, damage to the sheet material is prevented and the durability of the cold container is improved. Is possible.

  The invention according to claim 7 includes four peripheral wall portions connected in a rectangular shape so as to be bendable to each other, and two surfaces connected so as to be bendable along the upper edges of the two peripheral wall portions facing each other. A lid, and two bottom surfaces connected in a foldable manner along the lower edge of the two peripheral walls connected to the cover, the peripheral wall, the lid, and the bottom being either The sheet wall material is formed by including the vacuum heat insulating material according to any one of claims 1 to 5, and the two peripheral wall portions adjacent to the peripheral wall portion where the lid portion and the bottom surface portion are connected are substantially centered. The vacuum heat insulating material is divided along the folding line extending in the height direction at the part so that it can be bent. At the time of use, the lid part and the bottom part of the two surfaces are rotated to the closed position and engaged with each other to form a box When not in use, the lid part and the bottom part are disengaged, the bottom part is bent to the inside of the peripheral wall part or to the outside of the peripheral wall part, and the cover part Bend in the opposite direction to the bottom surface, close the adjacent peripheral walls close to each other while folding the foldable peripheral wall inward along the fold line, and overlap the lid, peripheral wall, and bottom This is a foldable cold storage container that can be folded together.

  According to the present invention, since all of the four peripheral wall portions, the two lid portions, and the two bottom surface portions are formed by enclosing the vacuum heat insulating material in the sheet material, high cold insulation performance is exhibited.

  Moreover, according to this invention, the surrounding wall part, the cover part, and the bottom face part are all connected so that bending is possible. And in the state where it was connected, it can be assembled into a box or folded and overlapped. This eliminates the need for attaching or removing another member, and can significantly reduce the effort required for assembly and folding. Moreover, since each part is connected, there is no possibility of losing a part of member.

  Further, according to the present invention, since the storage bag and the cover material are provided on the vacuum heat insulating material body, the sharp part of the fin portion and the vacuum heat insulation material body is covered with the storage bag and the cover material and directly contacts the sheet material. Do not touch. Thereby, it can prevent effectively that the sheet | seat material of a cold storage container is damaged by a fin part or a vacuum heat insulating material main body.

  In particular, according to the present invention, since it is a foldable cold storage container, the vacuum heat insulating material easily moves inside the sheet material when the cold storage container is folded or assembled. However, since the fins and sharply pointed parts of the vacuum heat insulating material body are covered with the storage bag or cover material, it is possible to prevent the sheet material from being damaged and to improve the durability of the cold insulation container. It becomes possible.

  Further, according to the present invention, since each surface is formed of a sheet material including a vacuum heat insulating material, the strength and rigidity of each surface are high, and the strength and rigidity when assembled into a box body are improved. Also, when folding, by folding the foldable peripheral wall inward along the fold line, the foldable peripheral wall can be folded compactly without protruding from the adjacent peripheral wall, Convenient for collection and storage.

  According to an eighth aspect of the present invention, in the collapsible cold storage container according to the seventh aspect, one of the lid portions is provided with a surface fastener along a side edge engaged with the other lid portion. The other lid portion is provided with a surface fastener at a portion corresponding to the engagement flap, and when the two lid portions are turned to the closed position, the side edges of both lid portions are provided. They are abutted against each other, and the engagement flap of one lid is brought into contact with the other lid to engage the surface fasteners.

  As a configuration for engaging the two lid portions, for example, a configuration can be adopted in which the two lid portions are rotated in a closed posture and the end portions are overlapped and engaged with each other. However, in this configuration, as the thickness of the lid portion increases, a step is produced between the lid portions when engaged, and a gap is created between the lid portion and the bendable peripheral wall portion. For this reason, the inside and outside of the cold insulation container communicate with each other through the gap, and the cold insulation performance is impaired.

  According to the present invention, when the lid portions on the two surfaces are turned to the closed posture, the side edges of both lid portions are brought into contact with each other. Thereby, even if the thickness of a cover part increases, a level | step difference does not arise between cover parts, but a clearance gap does not arise between an upper edge of a cover part and the surrounding wall part which can be bent.

  Moreover, since the engagement flap of one cover part is made to contact | abut to the other cover part and a surface fastener is engaged, the butted part of the side edge of both cover parts is covered with an engagement flap. Thereby, the abutting site | part of the side edge of a cover part can be shielded with an engagement flap, and internal / external communication can be shielded, and cold insulation performance improves.

  Further, since the engagement flap has flexibility, it is possible to easily release the engagement between the hook-and-loop fasteners by grasping a part of the engagement flap.

  The configuration of the present invention can also be applied to the bottom portion.

  By applying the configuration of the present invention to the bottom surface portion, even if the thickness of the bottom surface portion increases, no gap is generated between the peripheral wall portions that can be bent when the bottom surface portions are engaged with each other. . Moreover, since the engagement flap of one bottom face part is made to contact | abut to the other bottom face part, and a surface fastener is engaged, the butted part of the side edge of both bottom face parts is covered with an engagement flap, and shielding property is provided. Further improvement is possible.

  According to a ninth aspect of the present invention, in the foldable cold storage container according to the seventh or eighth aspect, the peripheral wall portion of the two foldable surfaces has flexibility having a surface fastener along the upper edge. The engaging flap is provided in a state of being biased upward from the lateral direction, and the surface fasteners are provided on the two lid portions corresponding to the surface fasteners, and the two lid portions are closed. When it is turned, the lid part comes into contact with each other while pressing the engagement flap, and the surface fasteners are engaged with each other.

  Here, as a configuration in which the lid portions on the two surfaces are engaged in the closed posture, the configuration according to claim 8, that is, a configuration in which the side edges of the lid portions are abutted and engaged with each other by an engagement flap is adopted. Even in this case, the bendable peripheral wall portion and the lid portion only abut on the sides. For this reason, a gap is easily formed between the bendable peripheral wall portion and the lid portion, which becomes a factor that impairs the cold insulation performance.

  According to the present invention, the engagement flap is provided along the upper edge of the bendable peripheral wall portion. Therefore, when the lid portion is rotated toward the closed position, the engagement flap is inward by the inner surface of the lid portion. It is pushed down to fall down. And an engagement flap and the surface fastener of a cover part engage. Thereby, between the bendable peripheral wall part and the cover part is shielded by the engagement flap, the generation of a gap is prevented, and the cold insulation performance is improved.

  Further, according to the present invention, the engagement flap is biased upward from the lateral direction. Therefore, it is possible to naturally engage the engagement flap and the surface fasteners of the lid portion only by rotating the lid portion toward the closed posture against the urging force of the engagement flap.

  In the present invention, as a configuration for biasing the engagement flap upward from the lateral direction, for example, a material (cloth) having a restoring force is used for the engagement flap, and the engagement flap can be bent. A configuration can be adopted in which the sheet material on the upper edge of the peripheral wall portion is sewn substantially upward. According to this configuration, the engagement flap does not hang downward even when used for a long time, and it is possible to reliably engage the hook-and-loop fasteners only by rotating the lid portion toward the closed position. .

  According to a tenth aspect of the present invention, in the foldable cold storage container according to any one of the seventh to ninth aspects, when folding, the bottom surface portion is bent inward of the peripheral wall portion and the lid portion is formed outward of the peripheral wall portion. It is set as the structure which bend | folds at the time, and it is set as the structure which attached the bottom sheet | seat which has the flexibility which covers the outer surface whole surface of the two bottom face parts at the time of use along the lower side edge of the four peripheral wall parts.

  According to the present invention, the entire outer surface of the bottom portion is covered with the bottom sheet. As a result, when the bottom surface portions are in a closed posture, even if a gap is generated between the bottom surface portions or between the bendable peripheral wall portion and the bottom surface portion, communication between the inside and outside is blocked by the bottom surface sheet, and the cold insulation performance is improved. Not damaged.

  Moreover, even if the ice adhering to the stored frozen goods melts and the water flows inside, the bottom sheet can prevent the outflow to the outside of the cold storage container.

  Further, according to the present invention, since the bottom surface portion is folded inwardly into the peripheral wall portion and folded, the bottom sheet is not obstructed when folded, and the bottom sheet has flexibility, so that the peripheral wall is folded when folded. It can be easily stored inside the unit.

(Embodiment 1)
Embodiments of the present invention will be described below with reference to the drawings.

  Fig.1 (a) is a perspective view which shows the vacuum heat insulating body 31 employ | adopted for the vacuum heat insulating material 5 which concerns on Embodiment 1 of this invention, FIG.1 (b) is AA arrow sectional drawing of (a). FIG. 2 is a perspective view showing a procedure for bending a fin portion of the vacuum heat insulating body 31 of FIG. 3 (a) and 3 (b) are perspective views showing a manufacturing procedure of the vacuum heat insulating material 5 according to Embodiment 1 of the present invention, and FIG. 3 (c) is a cross-sectional view taken along the line BB in FIG. 3 (b). FIG. The vacuum heat insulating material body 31 shown in FIG. 1 is used in common for the vacuum heat insulating materials of Embodiments 2 and 3 to be described later.

  As shown in FIG. 1B, the vacuum heat insulating material main body 31 employed in the present embodiment covers the board-shaped core material 32 with the covering materials 33 and 33 having gas barrier properties, and the covering materials 33 and 33. It is a heat insulating material formed by reducing the inside and vacuum-sealing.

  The core material 32 can be formed using at least any one of a fiber material, a resin foam material, or a granular material. In the present embodiment, a fiber material that is heat-formed into a board shape using a binder is used.

  The jacket material 33 can be formed using a material having gas barrier properties. In the present embodiment, a laminate film formed by laminating a heat welding layer and a protective layer on the inside and outside of the gas barrier layer is used as the covering material 33. That is, the covering material 33 is a metal foil such as aluminum, or a metal or non-oxide deposited film as a gas barrier layer, and a film such as unstretched polypropylene is used as a heat welding layer on the inner surface side of the gas barrier layer. The laminate film is a laminate film in which a film such as nylon or polyethylene terephthalate is laminated as a protective layer on the outer surface side of the gas barrier layer.

  The vacuum heat insulating body 31 covers a core material 32 formed of a fiber material in a board shape with covering materials 33 and 33 made of a laminate film having gas barrier properties, and the inside of the covering materials 33 and 33 is depressurized and vacuumed. It is a heat insulating material formed by sealing, and has a flat plate shape as shown in FIGS.

  The vacuum heat insulating material body 31 of the present embodiment has a thickness of approximately 12 mm, a thermal conductivity (initial thermal conductivity) of 0.005 W / mK, and has an excellent thermal insulation performance that is approximately four times that of a urethane resin. .

  As shown in FIG. 1A, the vacuum heat insulating material body 31 is formed by sealing and vacuum-sealing the outer covering materials 33, 33 including the core material 32. Fin portions (seal portions) 33a, 33b, and 33c are formed by joining the jacket materials 33 along.

  Since these fin portions 33a to 33c are formed by joining the jacket material 33 made of a laminate film by heat welding, the laminate film itself is a flexible material, but the fin portions 33a to 33c The corners K at the four corners are sharp and have considerable strength. For this reason, when manufacturing the cold insulation container or the like, if the vacuum heat insulating material main body 31 is included in the sheet material or the like as it is, the sharp corners K of the fin portions 33a to 33c may directly contact the sheet material and break through the sheet material. Occurs.

  Moreover, since the fin parts 33a-33c do not enclose the core material 32 like FIG.1 (b), they do not contribute to heat insulation. For this reason, when the area of a fin part increases with respect to the area of the vacuum heat insulating main body 31, the area which expresses heat insulation reduces. Therefore, when manufacturing a cold storage container etc., it is necessary to reduce the area of the fin parts 33a-33c as much as possible.

  The vacuum heat insulating material 5 of the present embodiment has a problem in using such a vacuum heat insulating material body 31, that is, damage to other members due to the corners K of the fin portions 33a to 33c, or the fin portions 33a to 33a. In order to avoid a decrease in heat insulation area due to 33c, a configuration is adopted in which the fin portions 33a to 33c are bent and the vacuum heat insulating material body 31 in which the fin portions 33a to 33c are bent is stored in a storage bag.

  The fin parts 33a-33c of the vacuum heat insulating material body 31 are bent in the procedure shown in FIG.

  That is, as shown in FIGS. 2A and 2B, the fins 33 c and 33 c along both longitudinal side edges of the vacuum heat insulating material body 31 are bent downward along the side edges to enclose the core material 32. Fold over the surface of the jacket material 33 corresponding to the part (the lower surface in FIG. 2a). At this time, as shown in FIG. 2 (b), the portion of the fold line of the fin portion 33c where the extension line of the fin portion 33a is related to the fin portion 33a is folded so that the fold line is inclined inward toward the end of the fin portion 33a. To sing.

  Next, as shown in FIG. 2 (c), the fins 33 a and 33 b at both longitudinal ends of the vacuum heat insulating material body 31 are placed on the surface of the outer cover material 33 corresponding to the encapsulated portion of the core material 32 (upper surface in FIG. 2 c). Fold it over. Then, as shown in FIG. 3A, the fins 33 a and 33 b are temporarily fixed to the surface of the jacket material 33 with a tape (temporary fixing member) 35.

  When the fin portions 33a to 33c of the vacuum heat insulating material body 31 are bent in this manner, the corners K at the four corners of the bent fin portions 33a to 33c are the vacuum heat insulating material main body as shown in FIG. The corners M are formed at the four corners of the vacuum heat insulating material body 31 on the upper surface side in the vicinity of both longitudinal ends of 31.

  As described above, these corners K and M are sharp and pointed and have strength, so that other members are easily damaged. However, the vacuum heat insulating material 5 of the present embodiment is configured to prevent the occurrence of damage to other members by storing the vacuum heat insulating material body 31 in the storage bag 36 and covering the corners K and M. .

  In the present embodiment, the fin portions 33a to 33c of the vacuum heat insulating material body 31 are bent as shown in FIG. 2, but all the fin portions 33a to 33c can be bent upward or downward. .

  The vacuum heat insulating material body 31 obtained by bending the fin portions 33a to 33c is stored in the storage bag 36 as shown in FIG.

  In the present embodiment, the storage bag 36 is formed using a sheet material 36a obtained by laminating a high-strength sheet base material and a sheet base fabric made of synthetic resin. In other words, the storage bag 36 is formed by stacking the rectangular sheet materials 36a, 36a with the sheet base material side facing each other, and sewing the three side edges 36c, 36d, 36d of the stacked sheet materials 36a, 36a. It is a bag.

  The sheet base material side of the inner surface of the storage bag 36 has higher surface smoothness and less friction than the outer sheet base fabric side. The storage bag 36 is slightly wider than the vacuum heat insulating body 31 and its length is longer than that of the vacuum heat insulating body 31.

  That is, in the storage bag 36, the sheet base material is positioned on the inner surface side and the sheet base fabric is positioned on the outer surface side, and there is less friction on the inner surface side than the outer surface side. Making it easy to do.

  As the synthetic resin material used for the sheet material 36a, an appropriate material can be used. For example, a resin material such as polypropylene, polyethylene, or polyester can be used. Moreover, in this Embodiment, the raw material used for the sheet material 36a is made into a raw material with a high flexibility compared with the jacket material 33 of the vacuum heat insulating body 31.

  The vacuum heat insulating material body 31 in which the fins 33a to 33c are bent is inserted from the opening 36b of the storage bag 36 as shown in FIG. 3 (a), and the opening of the storage bag 36 as shown in FIG. 3 (b). The part 36b is folded back and fixed with the tape 35. Thereby, the vacuum heat insulating material 5 which accommodated the vacuum heat insulating material main body 31 in the storage bag 36 is completed.

  In the present embodiment, the opening 36b of the storage bag 36 is folded as it is as shown in FIG. However, the sheet material 36a on the upper surface side of the opening 36b is first inserted between the lower surface of the vacuum heat insulating body 31 and the sheet material 36a on the lower surface side, and the sheet material 36a on the lower surface side of the opening 36b is inserted on the upper surface side. The sheet material 36a may be folded back.

  It is also possible to fold the three peripheral edges of the storage bag 36 containing the vacuum heat insulating body 31 inward and stop it with tape or the like.

  The vacuum heat insulating material 5 manufactured in this way is formed by covering the vacuum heat insulating material body 31 in which the fin portions 33a to 33c are bent with a storage bag 36, as shown in FIGS. Is done. Accordingly, the corners M of the four corners of the vacuum heat insulating material body 31 and the corners K of the fins 33a to 33c are covered with the sheet material 36a of the storage bag 36, and the corners M and K are not exposed. This prevents damage to other members by the corner portions M and K.

  Further, since the bent fin portions 33a to 33c are in close contact with the surface of the jacket material 33 by the storage bag 36, even if the tape 35 temporarily fixing the fin portions 33a to 33c to the jacket material is peeled off, The fins 33 a to 33 c are prevented from being lifted from the surface of the jacket material 33. As a result, it is possible to prevent problems such as the corners K of the raised fin portions 33a to 33c breaking through the sheet material 36a of the storage bag 36 and damaging other members.

  Thus, according to the vacuum heat insulating material 5 of the present embodiment, the corner portions K of the bent fin portions 33a to 33c can be obtained by an extremely simple configuration in which the vacuum heat insulating material body 31 is simply covered with the storage bag 36. The corner M of the vacuum heat insulating material body 31 is covered with the storage bag 36. Thereby, even when forming a cold insulation container etc. using the vacuum heat insulating material 5, it becomes possible to aim at the improvement of durability, without damaging the sheet material etc. which include the vacuum heat insulating material 5. FIG.

(Embodiment 2)
FIG. 4 is a perspective view showing a manufacturing procedure of the vacuum heat insulating material 6 according to Embodiment 2 of the present invention.

  The vacuum heat insulating material 6 of the present embodiment uses a storage bag 37 in place of the storage bag 36 in the vacuum heat insulating material 5 shown in the first embodiment, and the vacuum heat insulating material body 31 is the same. use. Accordingly, the same portions are denoted by the same reference numerals, and redundant description is omitted.

  The vacuum heat insulating material main body 31 employed in the vacuum heat insulating material 6 of the present embodiment is the same as the vacuum heat insulating material main body 31 employed in the first embodiment, and as shown in FIG. 33c is bent by the above procedure and temporarily fixed with the tape 35.

  As shown in FIG. 4A, the storage bag 37 used for the vacuum heat insulating material 6 is formed by stacking rectangular sheet materials 37a and 37a facing each other, and two side edges 37d along the longitudinal direction of the sheet material 37a. , 37d and sewn along a cylindrical shape.

  The storage bag 37 is slightly wider than the vacuum heat insulating body 31 and is longer than the vacuum heat insulating body 31. The sheet material 37a employed for the storage bag 37 is the same as the sheet material 36a employed in the first embodiment.

  The vacuum heat insulating material 6 is manufactured by inserting the vacuum heat insulating material body 31 into the storage bag 37. That is, as shown in FIG. 4 (a), the vacuum heat insulating material main body 31 with the fins 33a to 33c bent is inserted from either the opening 37b or the opening 37c of the storage bag 37, and FIG. In this manner, the openings 37 b and 37 c of the storage bag 37 protruding from both longitudinal ends of the vacuum heat insulating body 31 are folded and fixed with the tape 35.

  The vacuum heat insulating material 6 manufactured as described above is bent fin portions 33a to 33c with a very simple configuration in which the vacuum heat insulating material main body 31 is inserted into the storage bag 37 in the same manner as the vacuum heat insulating material 5 described above. The vacuum heat insulating material 6 can be formed by covering the corner portion K and the corner portion M of the vacuum heat insulating material body 31 with the storage bag 37. Thereby, even when forming a cold insulation container etc. using the vacuum heat insulating material 6, it becomes possible to aim at the improvement of durability, without damaging the sheet material etc. which contain the vacuum heat insulating material 6. FIG.

  In addition, although the vacuum heat insulating material 6 of this Embodiment set it as the structure which folded both ends of the storage bag 37 as it was like FIG.4 (b), the sheet | seat material 37a of the upper surface side of the opening part 37b is vacuumed first. The sheet material 37a may be inserted between the lower surface of the heat insulating body 31 and the lower surface side sheet material 37a, and the lower surface side sheet material 37a of the opening 37b may be folded back and overlapped with the upper surface side sheet material 37a. Further, the opening 37c can be folded in the same manner.

  It is also possible to fold the longitudinal side edges of the storage bag 37 containing the vacuum heat insulating body 31 inward and stop it with tape or the like.

  Moreover, although the vacuum heat insulating material 6 of this Embodiment was set as the structure which accommodates the whole vacuum heat insulating main body 31 in the one storage bag 37, the vacuum heat insulating main body 31 is used using two storage bags with short length. It is also possible to take a configuration that covers only both longitudinal ends of the.

(Embodiment 3)
FIG. 5 is a perspective view showing a manufacturing procedure of the vacuum heat insulating material 7 according to Embodiment 3 of the present invention.

  The vacuum heat insulating material 7 of the present embodiment uses a cover material 38 instead of the storage bag 36 in the vacuum heat insulating material 5 shown in the first embodiment, and the vacuum heat insulating material body 31 is the same. use. Accordingly, the same portions are denoted by the same reference numerals, and redundant description is omitted.

  The vacuum heat insulating material main body 31 employed in the vacuum heat insulating material 7 of the present embodiment is the same as the vacuum heat insulating material main body 31 employed in the first embodiment, and the fin portions 33a to 33c are also shown in FIG. In the same way, the one bent by the above procedure is used.

  The cover material 38 used for the vacuum heat insulating material 7 is a rectangular long sheet material as shown in FIG. 5A, and is made of the same material as the sheet material 36a employed in the first embodiment. Used.

  The vacuum heat insulating material 7 is manufactured by winding cover materials 38, 38 around the longitudinal end portions of the vacuum heat insulating material body 31. That is, as shown in FIG. 5 (a), the cover members 38, 38 are arranged in the short direction so as to cover the fin portions 33a, 33b at both longitudinal ends of the vacuum heat insulating material body 31 where the fin portions 33a-33c are bent. It is wound around the vacuum heat insulating material body 31 toward the end, and as shown in FIG.

  The vacuum heat insulating material 7 manufactured in this way has a very simple configuration in which the cover materials 38, 38 are wound around the vacuum heat insulating material body 31, and the corner portions K of the bent fin portions 33a to 33c and the vacuum The corner M of the heat insulating body 31 is covered with the cover members 38 and 38. Thereby, even when forming a cold insulation container etc. using the vacuum heat insulating material 7, it becomes possible to aim at the improvement of durability, without damaging the sheet material etc. which include the vacuum heat insulating material 7. FIG.

  In this embodiment, the cover members 38 are configured to be wound around the both longitudinal ends of the vacuum heat insulating body 31 in the short direction. It is also possible to adopt a configuration in which the wire is wound toward the head.

(Embodiment 4)
Next, a cold insulating container 1 according to Embodiment 4 of the present invention that employs the vacuum heat insulating material 5 (see FIG. 3) will be described.

  6 is a perspective view showing the foldable cold insulation container 1 according to the present embodiment, FIG. 7 is a cross-sectional view taken along the line CC in FIG. 6, and FIG. 8 is a state in which the lid of the cold insulation container 1 in FIG. 9 is a view taken in the direction of the arrow E in FIG. 8, FIG. 10 is a cross-sectional view taken along the line FF in FIG. 8, and FIG. Sectional drawing which shows the state which cancelled | released, FIG. 12 (a)-(e) is a perspective view which shows the procedure which folds the cold insulator 1 of FIG. 13 (a) is a perspective view showing a state in which the cold insulation container 1 of FIG. 6 is housed in a protective container, and FIGS. 13 (b) and (c) show the cold insulation container 1 folded when not in use as a protective container. It is a perspective view which shows the state to accommodate.

  The foldable cold storage container 1 of the present embodiment is a foldable cold storage container that is a box when in use and can be folded when not in use.

  As shown in FIG. 6, the cold insulation container 1 of the present embodiment includes four circumferential wall portions 10, 10, 13, and 13 that are connected to each other in a square shape so that they can be bent, and two opposed circumferential wall portions 10, 10, 10, two lids 16, 16 connected to bendable along the upper edges 11, 11, and a lower edge 12 of the two peripheral walls 10, 10 connected to the lids 16, 16. , 12 and two bottom surfaces 21 and 21 connected to each other so as to be bendable.

  In the present embodiment, the cover portion 16 has a length toward the facing cover portion 16, that is, a length L from the upper edge 11 of the peripheral wall portion 10 to the side edge 17 of the cover portion 16, and the peripheral wall portion 13. The lid portions 16, 16 on the two surfaces have the same shape. Further, the bottom surface portions 21 and 21 of the two surfaces have the same shape as the lid portion 16. Further, the length L of the lid portion 16 is shorter than the height H of the peripheral wall portion 10.

  Specifically, as shown in FIG. 6, the cold insulation container 1 of the present embodiment has a width W of 600 mm, a depth D of 400 mm, and a height H of 300 mm, and the length L of the lid portion 16 is substantially the same. The configuration is 200 mm and shorter than the height H. The internal volume of the cold container 1 is approximately 70 liters.

  As shown in FIG. 7, the peripheral wall portion 10, the lid portion 16, and the bottom surface portion 21 are all formed by enclosing the vacuum heat insulating material 5 in the sheet material 30.

  The vacuum heat insulating material 5 is the same as that shown in FIG. That is, the vacuum heat insulating body 31 formed by covering the core material 32 made of the fiber material shown in FIG. 3 is a vacuum heat insulating material 5 formed by being accommodated in a storage bag 36.

  As described above, the vacuum heat insulating material 5 has a thermal conductivity (initial thermal conductivity) of 0.005 W / mK, a thickness of approximately 12 mm, and high heat insulation in the peripheral wall portion 10, the lid portion 16, and the bottom surface portion 21. In addition to ensuring the properties, the respective parts are made thinner.

  The sheet material 30 is formed by sewing a polyester fabric with a synthetic resin coat on the back surface, and has water resistance, waterproofness and flexibility.

  In the present embodiment, a sheet having a thickness of 4 mm is provided on the outer wall surface of the peripheral wall portion 10, the lid portion 16, and the bottom surface portion 21 when the cold insulation container 1 is used or not used, as shown in FIG. A material 30a is used, and a sheet material 30b having a thickness of 2 mm is used on the other surface.

  In other words, each of the peripheral wall portion 10, the lid portion 16, and the bottom surface portion 21 of the cold container 1 has the vacuum heat insulating material 5 inside the sheet material 30 sewn in a bag shape having water resistance, waterproofness and flexibility. It is an enclosed structure. The peripheral wall portion 10, the lid portion 16, and the bottom surface portion 21 can be bent by connecting the side edges of the sheet material 30 to each other by sewing.

  Further, as shown in FIG. 6, the two peripheral wall portions 13 and 13 adjacent to the peripheral wall portions 10 and 10 connected to the lid portion 16 and the bottom surface portion 21 are formed by folding lines 23 extending in the height direction substantially at the center portion. The vacuum heat insulating material 5 is divided along the folding line 23, and the peripheral wall 13 can be bent along the folding line 23. In other words, the peripheral wall portion 13 is formed by storing the two vacuum heat insulating materials 5 and 5 inside the sheet material 30 sewn in a bag shape and sewing the sheet material 30 along the fold line 23. It is possible to bend along the line 23.

  In other words, the cold insulation container 1 according to the present embodiment includes the peripheral wall portions 10 and 13, the lid portion 16, and the bottom surface portion 21, each of which is formed by including the vacuum heat insulating material 5 in the sheet material 30. As described above, the vacuum heat insulating material body 31 covered with the storage bag 36 is used for 5. Thereby, compared with the structure which encloses the vacuum heat insulating material main body 31 in the sheet material 30 as it is, the sheet material 30 is effectively prevented from being damaged by the corners of the vacuum heat insulating material main body 31.

  As shown in FIGS. 6 and 8, one lid portion 16 is provided with a flexible engagement flap 18 having a surface fastener 18 a along the side edge 17, and the other lid portion 16 has A hook-and-loop fastener 20 is provided so as to correspond to the engagement flap 18 of one lid portion 16. The engagement flap 18 also uses the above-described sheet material 30b (thickness 2 mm, see FIG. 7), and is formed by sewing the surface fastener 18a on the sheet material 30b.

  Further, as shown in FIGS. 6 and 8, a flexible engagement flap 24 having a hook-and-loop fastener 24 a is provided substantially upward along the upper edge 14 on the two peripheral wall portions 13 that can be bent. It is attached by sewing in a state of being biased toward. The engagement flap 24 also uses the above-described sheet material 30b (thickness 2 mm, see FIG. 7), and is formed by sewing a surface fastener 24a on the sheet material 30b.

  Further, surface fasteners 19, 19 are provided on the inner surfaces of the two lid portions 16, 16 so as to correspond to the surface fasteners 24 a of the engagement flap 24.

  The bottom surface portion 21 has the same basic structure as the lid portion 16. That is, as shown in FIGS. 6 and 11, one bottom surface portion 21 is provided with a flexible engagement flap 22 having a surface fastener 22 a along the side edge 29. In addition, a hook-and-loop fastener 28 is provided on the other bottom surface portion 21 so as to correspond to the engagement flap 22 of the one bottom surface portion 21. The engagement flap 22 also uses the above-described sheet material 30b (thickness 2 mm, see FIG. 7), and is formed by sewing a surface fastener 22a on the sheet material 30b.

  As shown in FIGS. 6 and 11, on the outer surface side of the bottom surface portion 21, a flexible bottom sheet 27 that covers the entire outer surface is provided. In other words, the bottom sheet 27 is a rectangular sheet that is substantially equal to the outer shape of the two bottom surface portions 21, and its four sides are sewn along the lower edges 12 and 15 of the peripheral wall portions 10 and 13 and attached. It has been. In the present embodiment, the above-described sheet material 30b (thickness 2 mm, see FIG. 7) is also used for the bottom sheet 27.

  An inner lid 25 is provided inside the cold insulation container 1. The inner lid 25 is a rectangular sheet material having flexibility. As shown in FIGS. 6 and 10, one side of the inner lid 25 is attached by sewing along the upper edge 11 of the peripheral wall portion 10 to which the lid portion 16 is connected. It has been. The inner lid 25 is a shielding material for assisting the shielding by the lid portion 16.

  In the present embodiment, the inner lid 25 has a width substantially equal to the width W of the cold insulation container 1 as shown in FIG. 6, and the length is the length up to the opposing peripheral wall portions 10 as shown in FIG. 10. The sum of the height D and the height H of the peripheral wall 10 is greater than or equal to the sum. By setting the inner lid 25 to this size, as shown in FIG. 10, even when the frozen products S1 to S4 are stored in a part of the inside of the cold storage container 1 and a gap is generated, all of the frozen products S1 to S4 are stored. It can be covered with the inner lid 25, and the shielding effect is increased.

  In addition, a cool storage agent storage unit 26 that stores a cool storage agent is provided inside the cold insulation container 1. The cold storage agent storage unit 26 is a bag formed using a mesh net material as shown in FIGS. 6 and 10, and the cold storage agent 34 can be stored therein as shown in FIG. 10. In the present embodiment, the regenerator storage portion 26 is provided on the inner surface of the peripheral wall portion 10 to which the inner lid 25 is connected. Thereby, the cool storage agent 34 and frozen goods S1-S4 can be easily covered with the inner cover 25, and the cold preservation performance and shielding property of frozen goods S1-S4 are aimed at.

  In addition, the cool storage agent storage part 26 can be provided not only on the inner surface of the peripheral wall part 10 but also on the inner surfaces of the peripheral wall part 13 and the lid part 16.

  In the present embodiment, the cool storage agent storage unit 26 can store two cool storage agents 34 having a melting point of −27 ° C. to −18 ° C. and a weight of 1 kg. Moreover, the cool storage agent 34 used in this embodiment is “CAH-1001 minus 25 ° C. grade” manufactured by Inoac Corporation.

  Next, an assembling procedure at the time of using the cold insulating container 1 of the present embodiment will be described.

  First, as shown in FIG. 11, the bottom surface portions 21 and 21 are rotated to the closed posture (horizontal direction), and the side edges 29 and 29 are brought into contact with each other as shown in FIG. Then, the engagement flap 22 provided on one bottom surface portion 21 is pressed against the other bottom surface portion 21 so that the surface fastener 22a of the engagement flap 22 and the surface fastener 28 of the other bottom surface portion 21 are engaged with each other.

  When the bottom surface portions 21 and 21 are engaged in this way, a substantially flat surface is formed by both the bottom surface portions 21 as shown in FIG. 10, and the bottom sheet 27 is positioned below the bottom surfaces 21 and 21 so as to cover the entire surface. To do. Accordingly, even when a slight gap is generated between the bottom surface portion 21 and the peripheral wall portion 13, the communication between the inside and the outside is blocked by the bottom surface sheet 27, and the cold insulation performance is not impaired.

  In the present embodiment, the bottom sheet 27 is made of a water-resistant and waterproof sheet material 30b to prevent water staying inside from flowing out of the container.

  Next, as shown in FIG. 10, the above-described cold storage agent 34 is stored in the cold storage agent storage unit 26 as necessary, and frozen products S1 to S4 such as frozen food to be delivered are stored inside, and the frozen product S1 is stored. Put the inner lid 25 to cover ~ S4.

  Here, in the present embodiment, the regenerator 34 having a melting point of −27 ° C. or higher and −18 ° C. or lower is used. Usually, in a wholesaler or a distribution center that performs small-lot delivery, the temperature of a refrigerated warehouse is often controlled to about −30 ° C. to −22 ° C. Therefore, the cold storage agent 34 having the melting point in the above range is used so that the cold storage agent 34 can be solidified only by storing in the freezer warehouse. Thereby, at the time of delivery, it becomes possible to immediately store the refrigerating agent stored in the refrigeration warehouse and solidified in the cold insulation container 1 for cold preservation.

  When all the frozen products S1 to S4 to be stored are stored, the lid portions 16 and 16 are rotated to the closed posture (substantially horizontal direction). As shown in FIG. 8, when the lid portions 16 and 16 are turned inward, the engagement flap 24 provided on the peripheral wall portion 13 substantially upward is pressed by the turning of the lid portion 16 to be The hook-and-loop fastener 24a of the engagement flap 24 and the hook-and-loop fastener 19 of the lid 16 are engaged with each other. When both the lid portions 16 and 16 are moved to the closed posture, the entire surface fastener 24a of the engagement flap 24 is engaged with the surface fastener 19 of the lid portion 16, and the gap between the lid portion 16 and the peripheral wall portion 13 is established. It is shielded by the engagement flap 24.

  When the lid portions 16 and 16 are moved to the closed posture, the side edges 17 and 17 of the lid portions 16 and 16 are abutted with each other as shown in FIG. Finally, the engagement flap 18 provided on one lid 16 is pressed against the other lid 16 to engage the surface fasteners 18a and 20 with each other. Thereby, the abutting part of the side edges 17 and 17 of the lid parts 16 and 16 is covered with the engagement flap 18.

  In other words, the cold insulation container 1 of the present embodiment is configured by simply rotating the bottom surface portions 21 and 21 and the lid portions 16 and 16 to the closed posture and engaging them with the engagement flaps 22 and 18 as shown in FIG. As described above, a box surrounded by the peripheral wall portions 10 and 13, the bottom surface portion 21, and the lid portion 16 including the vacuum heat insulating material 5 is formed.

  As shown in FIG. 10, the formed box is covered with the engagement flap 22 at the abutting portion between the side edges 29 and 29 of the bottom surface portions 21 and 21, and the outer surface of the bottom surface portion 21 is the bottom sheet 27. Covered. Furthermore, as shown in FIG. 9, the abutting portions of the lid portions 16 and 16 are covered with the engagement flap 18, and the gap between the lid portion 16 and the peripheral wall portion 13 is shielded by the engagement flap 24.

  As described above, the cold insulation container 1 according to the present embodiment is assembled by moving the bottom surface portions 21 and 21 and the lid portions 16 and 16 to the closed posture, and the communication between the inside and the outside is completely blocked, and the entire surface is vacuum insulated. It is possible to immediately form a box body surrounded by materials and having a very high heat insulating property.

  In the present embodiment, by storing one cold storage agent having a melting point of −27 ° C. or more and −18 ° C. or less per 50 liters inside the cold insulation container 1, the average temperature of the atmosphere inside the cold insulation container 1 is set. It can be maintained at 0 ° C. or lower continuously for 10 hours or longer, and can be maintained at about −15 ° C. continuously for 10 hours or longer if replaced with the product temperature of a frozen product (for example, ice cream). Therefore, by delivering the cold storage container 1 in combination with the cold storage agent according to the present embodiment, it is possible to maintain the frozen product at a low temperature and perform long-distance delivery without damaging the quality. In addition, you may substitute at least one part of a cool storage agent with dry ice.

  Next, the folding procedure of the cold insulation container 1 when not in use will be described.

  The cold storage container 1 is folded, for example, when the cold storage container 1 is emptied after delivery or when the cold storage container 1 is stored and returned to the delivery source. In the following description of the folding procedure, it is assumed that the cool storage agent 34 stored in the cool storage agent storage unit 26 has been taken out.

  At the time of folding, first, as shown in FIG. 12A, the engagement flap 24 of the lid portion 16 of the cold insulation container 1 which is a box is grasped and pulled up. Then, as shown in FIG. 12B, the engagement of the surface fastener 18 a of the engagement flap 18 and the surface fastener 20 of the lid portion 16, and the engagement of the surface fastener 24 a of the engagement flap 24 and the surface fastener 19 of the lid portion 16. The lids 16 and 16 are rotated to the open posture while releasing the engagement.

  Next, as shown in FIG. 11 and FIG. 12C, the inner lid 25 is moved toward the regenerator storage portion 26 side, the engagement flap 22 of the bottom portion 21 is grasped and pulled up, and the surface fastener 22 a of the engagement flap 22 The engagement of the hook-and-loop fastener 28 of the bottom surface portion 21 is released. Then, as shown in FIG. 12 (d), the bottom surface portions 21 and 21 are folded on the inner surfaces of the peripheral wall portions 10 and 10, and the lid portions 16 and 16 are folded on the outer surfaces of the peripheral wall portions 10 and 10.

  Subsequently, as shown in FIG. 12D, the peripheral wall portions 10 are brought close to each other while the peripheral wall portions 13 are bent inward along the fold line 23. As a result, as shown in FIG. 12 (e), the four surfaces of the lid portion 16, the peripheral wall portion 10, the bottom surface portion 21, and the bent peripheral wall portion 13 were overlapped in order from the outside, and all eight surfaces overlapped. Folding is completed in the state.

  As described above, the cold insulation container 1 of the present embodiment can be folded very easily and compactly in a short time without attaching / detaching a member such as a heat insulating panel as in the prior art.

  When the cold insulation container 1 is folded, as shown in FIG. 12E, a total of eight surfaces of the lid portions 16 and 16, the peripheral wall portions 10 and 10, the bottom surface portions 21 and 21 and the peripheral wall portions 13 and 13 are folded. Become.

  Further, as described above, in the present embodiment, the length L (200 mm) of the lid portion 16 and the bottom surface portion 21 is shorter than the height H (300 mm) of the peripheral wall portions 10 and 13. Thereby, when the cold insulation container 1 is folded, it becomes a shape in which the eight surfaces are overlapped with the peripheral wall portion 10 as the maximum outer dimension.

  Further, the cold insulation container 1 of FIG. 6 uses the thick sheet material 30a shown in FIG. 7 for all surfaces located on the outside side when in use or not in use. That is, the thick sheet material 30a shown in FIG. 7 is employed on the outer surface side of the peripheral wall portion 10, the peripheral wall portion 13, and the bottom surface portion 21, and on the inner surface and outer surface side of the lid portion 16, respectively.

  More specifically, the lid portion 16 has a thickness of 20 mm, which is the sum of the thickness (12 mm) of the vacuum heat insulating material 5 and the thickness (4 mm + 4 mm) of the sheet material 30a containing it. The peripheral wall portions 10 and 13 have a thickness of 18 mm, which is the sum of the thickness (12 mm) of the vacuum heat insulating material 5 and the thicknesses (4 mm + 2 mm) of the sheet materials 30a and 30b enclosing it. Further, the bottom surface portion 21 has a thickness of 18 mm, which is the sum of the thickness (12 mm) of the vacuum heat insulating material 5 and the thicknesses (4 mm + 2 mm) of the sheet materials 30a and 30b enclosing it. Therefore, when the eight surfaces are folded and overlapped, the total thickness becomes approximately 148 mm.

  In other words, when the cold insulation container 1 of the present embodiment is folded, the outer dimension (W600 mm × H300 mm) of the peripheral wall portion 10 can be made the maximum outer dimension, and the thickness can be reduced to about 148 mm. Compared to this, it can be extremely compact. Thereby, it is also possible to store a plurality of folded cold insulation containers 1 in a general-purpose roll pallet or the like and easily move them.

  Further, as described above, the thick sheet material 30a is used for all the surfaces positioned on the outside side when in use or not in use.

  Accordingly, when the box is formed in use, the vacuum heat insulating material 5 included in each surface is protected from external force by the thick sheet material 30a. When folded when not in use, the inner surface of the lid portion 16 is protected from external force by the thick sheet material 30a. Thereby, the vacuum heat insulating material 5 can be protected from external force both during use and when it is not used, and the vacuum heat insulating material 5 can be prevented from being damaged and the durability can be improved.

  Furthermore, in the cold insulation container 1 of the present embodiment, the peripheral wall portions 10 and 13, the lid portion 16, and the bottom surface portion 21 are formed with the above-described vacuum heat insulating material 5 inside the sheet material 30. During folding and assembly, the sheet material 30 is not damaged by the vacuum heat insulating material 5 even if an external force is repeatedly applied to the peripheral wall portions 10 and 13, the lid portion 16, and the bottom surface portion 21.

  Thereby, it becomes possible to remarkably improve the durability of the cold container 1.

  Although the cold insulation container 1 of the present embodiment is configured using the vacuum heat insulating material 5 of the first embodiment, it is configured using the vacuum heat insulating materials 6 and 7 described in the second and third embodiments. It is also possible to do.

  Here, as described above, the cold insulation container 1 of the present embodiment is formed by the lid portion 16, the peripheral wall portions 10 and 13 and the bottom surface portion 21 including the vacuum heat insulating material 5 having predetermined strength and rigidity. Therefore, even when the cold container 1 is used alone, a certain degree of strength and rigidity can be obtained. However, the durability of the cold insulation container 1 can be remarkably improved by storing the cold insulation container 1 in a protective container having higher strength and rigidity and using it as a set.

  For example, as shown in FIG. 13 (a), a protective container 2 that can completely store the cold insulation container 1 is prepared, and the cold insulation container 1 that is a box at the time of delivery can be accommodated and used as a set. .

  The protective container 2 shown in FIG. 13 (a) is manufactured by molding a synthetic resin material, has a box shape with the top opened, and is extremely lightweight. The protective container 2 is formed with flange portions 2a and 2b by projecting the outer surfaces of the upper and lower portions over the entire circumference. Therefore, the protective container 2 can be easily carried using the flange portion 2a as a clue. In addition, the lids 16 and 16 can be opened and closed by grasping the engagement flap 18 while the cold container 1 is stored in the protective container 2.

  In addition, the flange portion 2b of the protective container 2 is overlapped with the flange portion 2a of another protective container 2 and can be engaged, and the protective containers 2 can be stacked in multiple stages. Therefore, even when a large number of protective containers 2 containing the cold storage containers 1 are loaded on a delivery vehicle, the loading space can be effectively used by stacking them in multiple stages, and an excessive load is not directly applied to the cold storage containers 1. There is no damage.

  As described above, the durability of the cold insulation container 1 can be remarkably improved by using the cold insulation container 1 together with the reduced weight protective container 2 as a set.

  Furthermore, as shown in FIG.12 (e), the cold storage container 1 can be folded in the shape on which 8 surfaces were piled up by making the surrounding wall part 10 into the largest outer dimension. Accordingly, as shown in FIGS. 13B and 13C, a plurality of folded cold-reserving containers 1... Can be stored in one protective container 2.

  As a result, a plurality of cold storage containers 1 can be collectively stored in the protective container 2 and easily carried, and preparation work and collection work for delivery can be performed efficiently. In addition, a plurality of cold storage containers 1 can be arranged and stored in the protective container 2, and the storage space can be reduced.

  Although the protective container 2 shown in FIG. 13 has been described as being formed in a box shape, the protective container 2 can be folded to facilitate carrying the protective container 2 during preparation and collection. The storage space can also be reduced.

  As described above, the vacuum heat insulating material according to the present invention can prevent damage to the member containing the vacuum heat insulating material, so that the vacuum heat insulating material is not limited to the cold storage container, but the sheet material. The durability can be remarkably improved by applying it to a heat insulating panel having a structure including the.

(A) is a perspective view which shows the vacuum heat insulating body main body employ | adopted as the vacuum heat insulating material which concerns on Embodiment 1-3 of this invention, (b) is AA arrow sectional drawing of (a). (A)-(c) is a perspective view which shows the procedure which bends the fin part of the vacuum heat insulating material main body of FIG. (A), (b) is a perspective view which shows the manufacturing procedure of the vacuum heat insulating material which concerns on Embodiment 1 of this invention, (c) is BB arrow sectional drawing of (b). (A), (b) is a perspective view which shows the manufacturing procedure of the vacuum heat insulating material which concerns on Embodiment 2 of this invention. (A), (b) is a perspective view which shows the manufacturing procedure of the vacuum heat insulating material which concerns on Embodiment 3 of this invention. The perspective view which shows the folding-type cold storage container which concerns on Embodiment 4 of this invention. CC sectional view of FIG. The perspective view which shows the state which closes the cover part of the cold storage container of FIG. E direction arrow view of FIG. FF arrow sectional view of FIG. Sectional drawing which shows the state which released the engagement of the bottom face part in GG arrow sectional drawing of FIG. (A)-(e) is a perspective view which shows the procedure which folds the cold storage container of FIG. (A) is a perspective view which shows the state which accommodated the cold storage container of FIG. 6 in the protection container, (b), (c) is a perspective view which shows the state which accommodates the cold storage container folded at the time of non-use in a protection container (A) is sectional drawing which shows the conventional vacuum heat insulating material, (b) is the top view. (A) is sectional drawing which shows the state which bent the fin part of the conventional vacuum heat insulating material, (b) is the top view

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Folding type cold storage container 2 Protection container 5, 6, 7 Vacuum heat insulating material 10, 13 Peripheral wall part 11,14 Upper edge 12,15 Lower edge 16 Lid part 17 Side edge 18 Engagement flap 18a Surface fastener 19 Surface fastener 20 surface Fastener 21 Bottom portion 23 Folding line 24 Engagement flap 24a Surface fastener 25 Inner lid 26 Cold storage agent storage portion 27 Bottom sheet 30 Sheet material 31 Vacuum heat insulating material body 32 Core material 33 Outer cover material 34 Cold storage agent K Corner portion (of the fin portion) Corners of the four corners)
M corner (the four corners of the vacuum insulation body)

In order to achieve the above object, the present invention is formed by covering a board-shaped core material with a jacket material having a gas barrier property, and covering a vacuum heat insulating material body in which the inside of the jacket material is evacuated and vacuum-sealed with a storage bag. The fin portion along the periphery of the outer cover material is folded on the surface of the outer cover material corresponding to the encapsulated portion of the core material, and the vacuum heat insulating material body in which the fin portion is folded It is a vacuum heat insulating material formed by covering the whole with one storage bag and folding back the opening of the storage bag .

Another of the present invention has a openable lid portion and the peripheral wall portion and the bottom portion of the four sides, each unit is formed by encapsulating the vacuum heat insulating material in both the sheet material, in use, the box by each unit This is a foldable cold storage container that can be folded by overlapping each part when not in use.

According to the present invention, the sheet material containing the vacuum heat insulating material and the vacuum heat insulating material main body do not directly contact each other. In other words, as described above, since the storage bag is provided in the vacuum heat insulating material, the sharp and sharp corners of the fin portion and the vacuum heat insulating material body are covered with the storage bag and do not directly contact the sheet material. Thereby, it is possible to effectively prevent the sheet material from being damaged.

In particular, according to the present invention, since it is a foldable cold storage container, the vacuum heat insulating material can easily move inside the sheet material when folding or assembling the cold storage container, and the fins and the sharp and sharp four corners of the vacuum heat insulating material main body are It is easy to repeatedly rub and abut against the sheet material. However, since the fins and sharply sharp corners of the vacuum heat insulating material body are covered with the storage bag , it is possible to prevent the sheet material from being damaged in advance.

According to the vacuum heat insulating material of the present invention, since the fin part and the sharply pointed portion of the vacuum heat insulating material body are covered with the storage bag , damage to other members including the vacuum heat insulating material is prevented. Thereby, it is possible to improve the durability while improving the heat insulation performance of the product using the vacuum heat insulating material of the present invention.

The vacuum heat insulating material according to claim 1 is formed by covering a board-shaped core material with a jacket material having a gas barrier property, and covering the vacuum heat insulating material main body, which is vacuum-sealed by reducing the pressure inside the jacket material, with a storage bag. The fin portion along the periphery of the outer cover material is folded on the surface of the outer cover material corresponding to the encapsulated portion of the core material, and the vacuum heat insulating material body in which the fin portion is folded The whole is covered with one storage bag, and the opening of the storage bag is folded back .

According to the present invention, since the whole vacuum heat insulating material body is stored in one storage bag with the fin portion bent, the four corners of the vacuum heat insulating material body are covered with the storage bag and are not exposed to the outside. Moreover, even if the bent fin part tries to return to the state before the bending, the storage bag prevents the floating from the jacket material.

According to a second aspect of the invention, in the vacuum heat insulating material according to claim 1, storage bag is configured to be manufactured in a flexible material than said outer covering material.

According to the present invention, since the packaging bag has a higher flexibility than the enveloping member, storage bag acts as a buffer. As a result, it is possible to effectively prevent the fins and the sharply pointed parts of the vacuum heat insulating material body from being covered with the storage bag and coming into direct contact with or rubbing against other members. Can be prevented.

The invention according to claim 3 is the vacuum heat insulating material according to claim 1 or 2 , wherein the core material is formed by compression-molding a fiber material into a board shape, and the jacket material is a laminated film material having gas barrier properties. It is set as the structure formed by.

Invention according to claim 4, having a peripheral wall portion and the bottom portion of the four sides and an openable lid portion, the peripheral wall portion, any one of claims 1 to 3 Both bottom part and Futabu the sheet material Formed by including the vacuum heat insulating material according to one item, when used, a box is formed by the peripheral wall, bottom and lid, and when not in use, the peripheral wall, bottom and lid are overlapped and folded. This is a foldable cold storage container that can be configured.

Further, according to the present invention, since the storage bag is provided in the vacuum heat insulating material, the sharply pointed portion of the fin part or the vacuum heat insulating material body is covered with the storage bag and does not directly contact the sheet material of the cold insulation container. Thereby, it can prevent effectively that the sheet | seat material of a cold storage container is damaged by a fin part or a vacuum heat insulating material main body. In particular, according to the present invention, since it is a foldable cold storage container, the vacuum heat insulating material easily moves inside the sheet material when the cold storage container is folded or assembled. However, since the fins and sharply pointed parts of the vacuum heat insulating material body are covered with the storage bag, it is possible to prevent damage to the sheet material and improve the durability of the cold storage container. Become.

The invention described in claim 5 includes four peripheral wall portions connected in a rectangular shape so as to be bendable with each other, and two surfaces connected in a bendable manner along the upper edge of the two peripheral wall portions facing each other. A lid, and two bottom surfaces connected in a foldable manner along the lower edge of the two peripheral walls connected to the cover, the peripheral wall, the lid, and the bottom being either The sheet wall material is formed by including a flat vacuum heat insulating material, and the two peripheral wall portions adjacent to the peripheral wall portion where the lid portion and the bottom surface portion are connected to each other are fold lines extending in the height direction at a substantially central portion. The vacuum heat insulating material can be bent along the vacuum insulating material, and the vacuum heat insulating material is a vacuum in which a board-shaped core material is covered with a jacket material having a gas barrier property, and the inside of the jacket material is decompressed and vacuum-sealed. It is a vacuum heat insulating material formed by covering the heat insulating material body with a storage bag, and the fin portion along the peripheral edge of the outer jacket material is the inclusion part of the core material A vacuum heat insulating material that is folded on the surface of the corresponding jacket material, and is formed by covering a part or all of the folded vacuum heat insulating material main body with a storage bag. The lid portion and the bottom surface portion are rotated to a closed position and engaged with each other to form a box. When not in use, the engagement between the lid portion and the bottom surface portion is released, and the bottom surface portion is moved inwardly or outwardly from the peripheral wall portion. Bending the lid part in the direction opposite to the bottom part, making the bendable peripheral wall part inward along the fold line, bringing adjacent peripheral wall parts close together, the cover part, It is a foldable cold storage container configured to be able to be folded by overlapping the peripheral wall portion and the bottom surface portion.

The invention according to claim 6 includes four peripheral wall portions connected in a rectangular shape so as to be bendable to each other, and two surfaces connected so as to be bendable along the upper edges of the two peripheral wall portions facing each other. A lid, and two bottom surfaces connected in a foldable manner along the lower edge of the two peripheral walls connected to the cover, the peripheral wall, the lid, and the bottom being either The sheet wall material is formed by including a flat vacuum heat insulating material, and the two peripheral wall portions adjacent to the peripheral wall portion where the lid portion and the bottom surface portion are connected to each other are fold lines extending in the height direction at a substantially central portion. The vacuum heat insulating material can be bent along the vacuum insulating material, and the vacuum heat insulating material is a vacuum in which a board-shaped core material is covered with a jacket material having a gas barrier property, and the inside of the jacket material is decompressed and vacuum-sealed. It is a vacuum heat insulating material formed by covering the heat insulating material body with a cover material, and the fin portion along the outer periphery of the outer cover material is an inclusion portion of the core material The cover material covers at least the corners of the four corners of the folded fin part and the corners of the four corners of the vacuum heat insulating material body folded of the fin part. It is a vacuum heat insulating material formed to cover, and when used, the lid and bottom of the two surfaces are turned into a closed position and engaged with each other to form a box, and when not used, the lid and bottom are engaged. Release the joint, bend the bottom part inward of the peripheral wall part or outward of the peripheral wall part, bend the lid part in the direction opposite to the bottom part, and inwardly turn the peripheral wall part that can be folded inward along the fold line It is a foldable cold storage container that is configured to be able to be folded by bringing adjacent peripheral wall portions close to each other while being folded and overlapping a lid portion, a peripheral wall portion, and a bottom surface portion.

According to a seventh aspect of the present invention, in the foldable cold storage container according to the fifth or sixth aspect of the present invention, one lid portion may be provided with a surface fastener along a side edge engaged with the other lid portion. A flexible engagement flap is provided, and the other lid portion is provided with a surface fastener at a portion corresponding to the engagement flap. When the two lid portions are rotated to the closed position, both lid portions are provided. The side edges are abutted against each other, and the engagement flap of one lid is brought into contact with the other lid to engage the surface fasteners.

According to an eighth aspect of the present invention, in the foldable cold storage container according to any one of the fifth to seventh aspects, the two peripheral wall portions that can be folded are provided with a surface fastener along the upper edge. A flexible engagement flap is provided in a state of being urged upward from the lateral direction, and a surface fastener is provided on the two lid portions corresponding to the surface fastener, and the two-surface lid is provided. When the part is rotated toward the closed posture, the lid part comes into contact with the engaging flap being pressed down and the surface fasteners are engaged with each other.

Here, as a configuration in which the lid portions on the two surfaces are engaged in the closed posture, the configuration according to claim 7 , that is, a configuration in which the side edges of the lid portions are abutted and engaged with each other by an engagement flap is adopted. Even in this case, the bendable peripheral wall portion and the lid portion only abut on the sides. For this reason, a gap is easily formed between the bendable peripheral wall portion and the lid portion, which becomes a factor that impairs the cold insulation performance.

According to a ninth aspect of the present invention, in the foldable cold storage container according to any one of the fifth to eighth aspects, when folding, the bottom surface portion is folded inwardly into the peripheral wall portion and the lid portion is formed outwardly of the peripheral wall portion. It is set as the structure which bend | folds at the time, and it is set as the structure which attached the bottom sheet | seat which has the flexibility which covers the outer surface whole surface of the two bottom face parts at the time of use along the lower side edge of the four peripheral wall parts.

Claims (10)

  A vacuum heat insulating material formed by covering a board-shaped core material with a jacket material having a gas barrier property, and covering the vacuum heat insulating material body in which the inside of the jacket material is vacuum-sealed with a storage bag, A fin portion along the periphery of the workpiece is folded on the surface of the jacket material corresponding to the encapsulated portion of the core material, and a part or all of the folded vacuum heat insulating material body of the fin portion is covered with a storage bag. Vacuum insulation formed.   A vacuum heat insulating material formed by covering a board-shaped core material with a jacket material having a gas barrier property, and covering the vacuum heat insulating material body, which is vacuum-sealed by reducing the pressure inside the jacket material, The fins along the periphery of the workpiece are folded on the surface of the jacket material corresponding to the core enclosing part, and at least the corners of the four corners of the folded fin and the vacuum of the fins are folded. A vacuum heat insulating material formed by covering the four corners of the heat insulating material main body with a cover material.   The vacuum heat insulating material according to claim 1 or 2, further comprising a temporary fixing member for temporarily fixing a fin portion folded on a surface of the outer jacket material to the outer jacket material.   The vacuum heat insulating material according to any one of claims 1 to 3, wherein the cover material or the storage bag is made of a material having higher flexibility than the jacket material.   5. The core material according to claim 1, wherein the core material is formed by compression-molding a fiber material into a board shape, and the covering material is formed of a laminated film material having gas barrier properties. The vacuum insulation material described.   The vacuum insulating material according to any one of claims 1 to 5, further comprising: a four-surface peripheral wall portion, a bottom surface portion, and an openable / closable lid portion, wherein the peripheral wall portion, the bottom surface portion, and the lid portion are all sheet materials. Characterized in that, when used, a box is formed by the peripheral wall portion, the bottom surface portion and the lid portion, and when not in use, the peripheral wall portion, the bottom surface portion and the lid portion can be overlapped and folded. Foldable cold storage container. Four peripheral wall portions connected to each other in a square shape so as to be bendable, two lid portions connected so as to be bendable along the upper edge of the two opposing peripheral wall portions, and connection of the lid portions And two bottom surfaces connected in a foldable manner along the lower edge of the two peripheral wall portions, and the peripheral wall portion, the lid portion, and the bottom surface portion are all made of sheet material. The two peripheral wall portions that are formed so as to include the vacuum heat insulating material according to claim 5 and that are adjacent to the peripheral wall portion where the lid portion and the bottom surface portion are connected to each other extend substantially in the height direction at the center portion. The vacuum heat insulating material is divided along the fold line so that it can be bent,
When in use, the lid and bottom of the two surfaces are rotated to a closed position and engaged with each other to form a box, and when not in use, the engagement of the lid and bottom is released, and the bottom is Bends inward or outward of the peripheral wall portion, bends the lid portion in a direction opposite to the bottom surface portion, and adjoins the bendable peripheral wall portion inwardly along a fold line. A foldable cold storage container characterized in that the peripheral wall portions are brought close to each other and can be folded by overlapping the lid portion, the peripheral wall portion, and the bottom surface portion.   The one lid portion is provided with a flexible engagement flap having a surface fastener along a side edge engaged with the other lid portion, and the other lid portion has the engagement. A surface fastener is provided at a portion corresponding to the flap, and when the lid portions of the two surfaces are turned to the closed position, the side edges of both lid portions are brought into contact with each other, and the engaging flap of the one lid portion is connected to the other lid. The folding cold storage container according to claim 7, wherein the hook-and-loop fasteners are brought into contact with each other to engage with each other.   On the peripheral wall portion of the two bendable surfaces, a flexible engagement flap having a surface fastener along the upper edge is provided in a state of being biased upward from the lateral direction, Corresponding to the surface fasteners, surface fasteners are provided on the two lids, and when the lids of the two surfaces are rotated toward the closed position, the lids abut while pressing the engagement flaps. The folding cold storage container according to claim 7 or 8, wherein the hook-and-loop fasteners are engaged with each other.   At the time of folding, the bottom portion is bent inward to the peripheral wall portion and the lid portion is bent outward from the peripheral wall portion, and has flexibility to cover the entire outer surface of the two bottom surface portions in use. The foldable cold storage container according to any one of claims 7 to 9, wherein a bottom sheet is attached along a lower edge of the peripheral wall portion of the four surfaces.

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