JP2017030862A - Cold container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cold container which is well-insulated, light and inexpensive.SOLUTION: A cold container comprises a plurality of walls 2 to form a closed space to store goods. Each of the plurality of walls 2 has: a bag 6 with insulation gas having lower thermal conductivity than air sealed therein; and an inner coating plates 7A and an outer coating plate 7B which place the bag 6 therebetween. The bag 6 is made of a film which does not allow the insulation gas to permeate the same. The inner coating plates 7A and the outer coating plate 7B are made of, paper cardboard, reinforced cardboard or plastic cardboard.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cold container that can store articles such as perishable foods and can carry the articles while maintaining the temperature.

  Traditionally, refrigerated containers are used to transport items that require refrigeration or freezing, such as fresh food (eg, fruits and vegetables, seafood). Since the temperature of the inside of the cold container can be maintained at a low temperature, it is possible to prevent deterioration of the quality of the articles stored in the cold container. Such a cold container may be used not only for foodstuffs but also for conveying pharmaceutical products and industrial products that require temperature control.

  The cold storage container has, for example, a snow receiver that holds snow dry ice (see Patent Document 1 and Patent Document 2). Snow dry ice is obtained by injecting liquefied carbon dioxide into the inside of the cold storage container and solidifying the liquefied carbon dioxide. Snow dry ice on the snow catcher keeps the temperature inside the cold storage container at a low temperature so that the goods can be placed in the market, restaurant, retail store or home without degrading the quality of the goods in the cold storage container. Can be transported.

  By using such a cold container, it is not necessary to mount a cooling device on a transport vehicle such as a truck. As a result, more articles can be loaded on the transport vehicle. Furthermore, since the power cost required to drive the cooling device and the maintenance cost of the cooling device are not required, the running cost can be greatly reduced. Furthermore, even when the cargo is transshipped at the transit terminal of the transport vehicle, the use of the cold storage container prevents the article from being exposed to a normal temperature atmosphere, thereby preventing deterioration of its quality.

Japanese Patent No. 2867116 Japanese Patent No. 3124677

  However, the conventional cold-insulated container forms an internal storage space with a heat insulating material such as polystyrene foam or urethane, and further covers the heat insulating material with an exterior plate made of a metal such as stainless steel or aluminum. Since the cold insulation container comprised of such a heat insulating material and an exterior plate is expensive, a user who purchases many cold insulation containers has been burdened with cost. Furthermore, since such a cold insulated container is very heavy, movement of a cold insulated container requires a great effort.

  This invention is made | formed in view of the above-mentioned situation, and it aims at providing the cold insulated container which is excellent in heat insulation performance, and is lightweight and cheap.

In order to achieve the above-described object, one aspect of the present invention includes a plurality of walls forming a closed space for storing an article, each of the plurality of walls having a lower thermal conductivity than air. A bag in which a heat insulating gas is enclosed, and an inner cover plate and an outer cover plate sandwiching the bag, the bag being made of a film that does not allow the heat insulating gas to pass through, and the inner cover The board and the outer cover board are made of paper cardboard, reinforced cardboard, or plastic cardboard.
In a preferred aspect of the present invention, the plurality of walls are six walls constituting a hexahedron.

  One embodiment of the present invention includes a plurality of hollow walls that form a closed space for storing articles, and the plurality of hollow walls are filled with a heat insulating gas having a lower thermal conductivity than air. The plurality of hollow walls are made of a flexible sheet.

In a preferred aspect of the present invention, the insides of the plurality of hollow walls communicate with each other.
In a preferred aspect of the present invention, the first hollow wall and the second hollow wall included in the plurality of hollow walls are connected to each other by a hinge having a space formed therein, The inside and the inside of the second hollow wall communicate with each other through a space in the hinge.
In a preferred aspect of the present invention, any one of the plurality of hollow walls is provided with a gas inlet for injecting the heat insulating gas into the plurality of hollow walls. Is provided with a safety valve that opens when the pressure of the insulating gas injected into the plurality of hollow walls exceeds a set value.

In a preferred aspect of the present invention, the interiors of the plurality of hollow walls form spaces that are independent from each other, and each of the plurality of hollow walls has a gas inlet and a gas outlet that communicate with the interior. It is characterized by.
In a preferred aspect of the present invention, the gas discharge port is constituted by a check valve.
In a preferred aspect of the present invention, a partition wall is formed in at least one of the plurality of hollow walls, and a through hole that allows passage of heat insulating gas is formed in the partition wall. To do.

  One embodiment of the present invention includes a plurality of walls that form a closed space for storing an article, and each of the plurality of walls has a flow path therein, and among the plurality of walls, One of the plurality of walls has a gas inlet, and the gas inlet has the adiabatic gas injection port. A cold container that communicates with an inlet and the flow path.

In a preferred aspect of the present invention, the flow paths respectively formed in the plurality of walls communicate with each other.
In a preferred aspect of the present invention, one of the plurality of walls is provided with a check valve communicating with the flow path.

In a preferred aspect of the present invention, the flow paths formed inside the plurality of walls each form a space independent from each other, and the plurality of walls are respectively connected to the gas inlet and the flow path. It has the gas exhaust port which connects.
In a preferred aspect of the present invention, the gas inlet is formed on an inner surface of the plurality of walls and communicates with the heat insulating gas inlet through the closed space.
In a preferred aspect of the present invention, the gas discharge port is constituted by a check valve.

In a preferred aspect of the present invention, each of the plurality of walls is composed of reinforced corrugated cardboard or plastic corrugated cardboard having a flow path formed therein.
In a preferred aspect of the present invention, a breathable snow dry ice tray is disposed in the closed space, and the heat insulating gas inlet is adjacent to the snow dry ice tray. And
The preferable aspect of this invention is further equipped with the shutter which closes the said heat insulation gas injection port, The said shutter is arrange | positioned on the outer side of the said gas inflow port, It is characterized by the above-mentioned.
In a preferred aspect of the present invention, an air-permeable filler is disposed in the flow path.

  One aspect of the present invention includes a movable carriage provided with wheels, and the cold insulation container placed on the carriage, the carriage supporting both side walls and a back wall of the cold insulation container; The container assembly includes a door that supports a front wall of the cold container.

  According to the present invention described above, it is possible to provide a cold storage container that is lightweight and has high cold storage performance at low cost. Furthermore, since the cold storage container according to the present invention has a simple configuration and does not use a heat insulating material such as polystyrene foam or urethane, waste can be reduced and the influence on the environment can be reduced.

It is a figure which shows one Embodiment of the cold storage container of this invention. It is an expanded view of the cold storage container shown in FIG. It is an enlarged view of a bag. It is an expanded view of the bag used for a cold storage container. It is a figure which shows embodiment which comprises a heat insulation panel by combining multiple walls shown in FIG. It is a front perspective view which shows other embodiment of the cold storage container of this invention. It is a rear view of the cold storage container shown in FIG. It is a perspective view which shows the state in which the front wall is open. It is sectional drawing of a hollow wall. It is an expanded view of the cold storage container which concerns on embodiment shown in FIG. 11 (a) is a top view of the hinge, FIG. 11 (b) is a bottom view of the hinge, and FIG. 11 (c) is a cross-sectional view taken along line AA of FIG. 11 (a). It is sectional drawing of the front wall and right side wall which were connected by the hinge. It is a rear view which shows other embodiment of a cold storage container. It is a front perspective view which shows other embodiment of the cold storage container of this invention. It is a rear view of the cold storage container shown in FIG. It is a perspective view which shows the state in which the front wall is open. It is a figure which shows the cross section of the wall comprised from the reinforced cardboard. It is a figure which shows the cross section of the wall comprised by bonding together several sheets of reinforced cardboard. It is a figure which shows the cross section of the other example of the wall comprised by bonding together several sheets of reinforced cardboard. It is an expanded view of the cold storage container manufactured in the state in which all six walls were connected. It is a figure which shows a mode that the cold storage container shown in FIG. 20 is assembled. It is a figure which shows the cold storage container which the assembly was completed. 23 (a) to 23 (c) are enlarged cross-sectional views showing a connection portion between two adjacent walls shown in FIG. It is sectional drawing which shows the upper part of a cold storage container. FIG. 25A and FIG. 25B are diagrams illustrating a state in which liquefied carbon dioxide is supplied from the liquefied carbon dioxide supply device to the cold container. It is the figure where the flow path of the wall comprised from the reinforced cardboard was filled with the filler. It is the figure where the flow path of the wall comprised from the plastic corrugated board was satisfy | filled with the filler. It is a front view which shows other embodiment of a cold storage container. It is a rear view of the cold storage container shown in FIG. It is a perspective view which shows the state in which the front wall is open. It is a perspective view which shows the trolley | bogie for carrying the cold storage container which concerns on embodiment shown to FIG. 14 thru | or FIG. 16, and embodiment shown to FIG. It is a perspective view which shows the container assembly comprised from the trolley | bogie shown in FIG. 31 and the cold storage container installed on this trolley | bogie. It is a perspective view which shows the state which opened the door of the trolley | bogie and the front wall of a cold storage container.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a view showing an embodiment of the cold storage container of the present invention, and FIG. 2 is a development view of the cold storage container shown in FIG. The cold storage container according to the present embodiment is a container for storing articles that require temperature control, such as food, pharmaceuticals, and industrial products, and is lightweight and low-cost, and can be used repeatedly. It can also be used for disposable applications.

  The cold storage container 1 has a plurality of walls 2 </ b> A to 2 </ b> F that form closed spaces for storing articles therein. The cold storage container 1 according to the present embodiment is a hexahedron composed of six walls: an upper wall 2A, a bottom wall 2B, a right wall 2C, a left wall 2D, a front wall 2E, and a back wall 2F. When referring to the plurality of walls 2 </ b> A to 2 </ b> F without particular distinction, they are simply referred to as a wall 2. One of the plurality of walls 2 is configured to be openable and closable. In the present embodiment, the upper wall 2A is configured as a removable lid.

  As shown in FIG. 2, each wall 2 includes a bag 6 in which a heat insulating gas having a thermal conductivity lower than that of air is enclosed, and corrugated cardboard 7 </ b> A which is an inner covering plate and an outer covering plate sandwiching the bag 6. 7B. FIG. 3 is an enlarged view of the bag 6. The bag 6 forms a completely sealed space inside and is made of a film that does not allow the insulating gas to pass through. In this embodiment, a deformable flexible film is used as the film. For example, as a material for the flexible film, synthetic resins such as polyvinyl chloride and polypropylene can be used.

  The bag 6 is provided with a gas injection port 9 for injecting a heat insulating gas into the bag 6. Examples of the heat insulating gas to be injected include carbon dioxide gas that is inexpensive and easily available on the market. This carbon dioxide gas has lower thermal conductivity than air and is excellent in heat insulation. The thermal conductivity of air at room temperature (30 ° C.) is 0.0264 W / m · K, and the heat insulating gas used is a thermal conductivity smaller than 0.0264 W / m · K at room temperature (30 ° C.). It is gas which has. The thermal conductivity of carbon dioxide gas is 0.0145 W / m · K at 0 ° C. and has a very high heat insulating effect. However, the heat insulating gas is not limited to carbon dioxide gas, and a gas other than carbon dioxide gas can be used as long as the thermal conductivity is lower than that of air.

  The adiabatic gas is injected into the bag 6 through the gas inlet 9, whereby the bag 6 expands. The gas inlet 9 includes a valve, and the insulating gas is sealed in the bag 6 by closing the valve after the insulating gas is injected.

  FIG. 4 is a development view of the bag 6 used in the cold container 1. As shown in FIG. 4, six bags 6 in which a heat insulating gas is sealed are used for a cold container 1 made of a hexahedron. That is, six bags 6 filled with heat insulating gas are used for the six walls 2 of the top wall 2A, the bottom wall 2B, the right side wall 2C, the left side wall 2D, the front wall 2E, and the back wall 2F. A plurality of bags 6 may be used for one wall 2.

  As shown in FIGS. 1 and 2, each bag 6 is sandwiched between a cardboard 7A that is an inner covering plate and a cardboard 7B that is an outer covering plate. The cardboards 7A and 7B not only hold the entire shape of the cold container 1 but also function as a protective cover for the bag 6. Corrugated cardboard is advantageous in that it is lightweight, relatively high in strength, and low in cost. Therefore, the use of cardboard makes it possible to realize a light and inexpensive cold insulated container 1.

  Corrugated cardboard 7A used as an inner covering plate of right side wall 2C, left side wall 2D, front side wall 2E, and rear side wall 2F is connected to each other, and similarly, right side wall 2C, left side wall 2D, front side wall 2E, and Corrugated cardboard 7B used as an outer covering plate of back wall 2F is connected to each other. Thus, the corrugated board A and / or the corrugated board 7B used for two adjacent walls 2 of the plurality of walls 2 may be connected to each other.

  In the present embodiment, paper cardboard is used as the inner cover plate and the outer cover plate. In one embodiment, reinforced corrugated cardboard having a higher strength than corrugated cardboard may be used. Such reinforced cardboard is available on the market. Further, in addition to the reinforced cardboard, a light and high strength material may be used. For example, a material using a material that reproduces the structure of a paper cardboard (hollow structure) made of resin or the like found in plastic corrugated cardboard, etc. As an example of the combination, reinforced corrugated cardboard or plastic corrugated cardboard is used for the outer wall, and the core material is polycarbonate It is possible to use a material having a hollow structure that can store heat insulating gas by combining existing materials, such as corrugated plates of materials.

  According to this embodiment, since the heat insulation gas is enclosed with all the walls 2 which comprise the cold storage container 1 which consists of hexahedrons, the temperature inside the cold storage container 1 can be kept low. Therefore, these articles can be transported while maintaining the temperature of the articles that require refrigeration or freezing, such as foodstuffs, pharmaceuticals, and industrial products. For example, the cold container 1 can be applied to the transportation of food to a grocery store or a store such as a restaurant.

  The cold insulation container 1 of this embodiment does not use a heat insulating material such as expanded polystyrene or urethane, but uses a heat insulating gas (for example, carbon dioxide gas) having a lower thermal conductivity than a general heat insulating material such as expanded polystyrene or urethane. Thus, it is possible to realize weight reduction, improvement of heat insulation performance, and reduction of manufacturing cost. In particular, it is possible to add heat insulation performance easily and inexpensively to corrugated cardboard or reinforced corrugated cardboard, which has been difficult to add high heat insulation performance until now. Moreover, since no polystyrene foam or urethane is used, waste can be reduced and the impact on the environment can be reduced. Therefore, the cold insulated container 1 which concerns on this embodiment can be used also for disposable uses, such as a production center direct delivery.

  When stocked for use, it can be stored in a warehouse or the like in a state where the insulating gas is not sealed, that is, in a compact state. In addition, when the cold container 1 is used up, it can be made compact again by opening the valve of the gas inlet 9 and releasing the heat insulating gas from the bag 6.

  Since the corrugated cardboard is easy to process, the wall 2 having a desired size can be created. Therefore, it is possible to easily create a cold container 1 having a desired size according to the article to be conveyed. Moreover, the wall 6 comprised from the card | curd 6 enclosed with the heat insulation gas demonstrated in this embodiment, and the cardboard 7A, 7B or the reinforced cardboard which pinches | interposes this bag 6 can be used as a general purpose heat insulation panel. For example, as shown in FIG. 5, it can be used as a large heat insulation panel for a house or a refrigerator-freezer car by combining a plurality of the walls 2 of the present embodiment.

  Next, another embodiment of the present invention will be described. FIG. 6 is a front perspective view showing another embodiment of the cold insulated container of the present invention. FIG. 7 is a rear view of the cold container shown in FIG. The cold storage container 21 has a plurality of hollow walls 22 </ b> A to 22 </ b> F that form closed spaces for storing articles therein. The cold storage container 21 according to the present embodiment is a hexahedron composed of six hollow walls: an upper wall 22A, a bottom wall 22B, a right side wall 22C, a left side wall 22D, a front wall 22E, and a back wall 22F. When the plurality of hollow walls 22A to 22F are referred to without particular distinction, they are simply referred to as hollow walls 22. One of the plurality of hollow walls 22 is configured to be openable and closable. In the present embodiment, the front wall 22E constitutes a door that can be opened and closed. FIG. 8 is a perspective view showing a state in which the front wall 22E is open.

  Each hollow wall 22 is filled with a heat insulating gas having a lower thermal conductivity than air. Examples of the insulating gas include carbon dioxide gas which is inexpensive and easily available on the market. This carbon dioxide gas has lower thermal conductivity than air and is excellent in heat insulation. If the thermal conductivity is lower than that of air, a gas other than carbon dioxide can be used. The hollow wall 22 is comprised from the flexible sheet | seat, and each hollow wall 22 is expanded by the pressure of the heat insulation gas. The hollow wall 22 that expands due to the pressure of the heat insulating gas enclosed therein is also called an inflatable board (inflatable board). The flexible sheet constituting the hollow wall 22 is made of a flexible synthetic resin such as rubber or polyester.

  FIG. 9 is a cross-sectional view of the hollow wall 22. As shown in FIG. 9, a partition wall 26 is provided inside each hollow wall 22 to partition the interior into a plurality of rooms. The partition wall 26 is provided to maintain the entire hollow wall 22 in a plate shape when the pressure of the heat insulating gas is applied to the hollow wall 22 from the inside. The partition wall 26 is formed with a through hole 27 that allows passage of the heat insulating gas. Therefore, the chambers on both sides of the partition wall 26 communicate with each other through the through hole 27. In the present embodiment, a plurality of partition walls 26 are provided. However, depending on the size and / or shape of the hollow wall 22, only one partition wall 26 may be provided, or the partition wall 26 may not be provided. Good.

  FIG. 10 is a development view of the cold container 21 according to the embodiment shown in FIG. 6. Each hollow wall 22 is formed with a communication hole 30 at a corresponding position, and the interiors of two adjacent hollow walls 22 communicate with each other through the communication hole 30. Therefore, all the interiors of the six hollow walls 22 communicate with each other. Of the six hollow walls 22, the upper wall 22A, the bottom wall 22B, the right side wall 22C, the left side wall 22D, and the back wall 22F are connected by welding. At least two adjacent ones of the top wall 22A, the bottom wall 22B, the right side wall 22C, the left side wall 22D, and the back wall 22F may be integrally formed. For example, the right side wall 22C, the left side wall 22D, and the back wall 22F may have a structure formed integrally.

  The front wall 22E that functions as a door that can be opened and closed is connected to the right side wall 22C by a plurality of hinges 32. A hook-and-loop fastener 35 as a door lock is attached to the front wall 22E and the right side wall 22C. When the upper wall 22A is configured as a door that can be opened and closed, the upper wall 22A is connected to any of the front wall 22E, the right side wall 22C, the left side wall 22D, or the back wall 22F by a plurality of hinges 32.

  11 (a) is a top view of the hinge 32, FIG. 11 (b) is a bottom view of the hinge 32, and FIG. 11 (c) is a cross-sectional view taken along line AA of FIG. 11 (a). The hinge 32 is made of a deformable material such as rubber or polyester. The hinge 32 has a semi-cylindrical protrusion 37, and a space 38 is formed inside the protrusion 37. Two through holes 39 communicating with the space 38 are formed at the bottom of the hinge 32. FIG. 12 is a cross-sectional view of the front wall 22E and the right wall 22C connected by the hinge 32. As shown in FIG. One of the two through holes 39 formed at the bottom of the hinge 32 is connected to the communication hole 30 formed in the right side wall 22C, and the other through hole 39 is formed in the front wall 22E. It is connected to the communication hole 30. Therefore, the inside of the front wall 22E communicates with the inside of the right side wall 22C through the space 38 in the hinge 32.

  As shown in FIG. 7, a gas injection port 41 is attached to the left side wall 22D. A heat insulating gas such as carbon dioxide gas is injected into the hollow wall 22 through the gas injection port 41. Since the interiors of all the hollow walls 22 including the front wall 22E functioning as a door communicate with each other through the communication holes 30, the heat insulating gas injected from the gas injection port 41 is supplied to the interiors of all the hollow walls 22. The inside of the hollow wall 22 is filled with a heat insulating gas. The gas inlet 41 is provided with a valve, and the heat insulating gas can be confined inside the hollow wall 22 by closing the valve after the heat insulating gas is injected. When the use of the cold container 21 is finished, the heat insulating gas can be discharged from the hollow wall 22 by opening the valve.

  The right side wall 22C is provided with a safety valve 42 that opens when the pressure of the insulating gas injected into the six hollow walls 22 exceeds a set value. The safety valve 42 can prevent the hollow wall 22 from rupturing due to excessive pressure of the heat insulating gas.

  According to the present embodiment, since the heat insulating gas is sealed in all the hollow walls 22 constituting the cold insulation container 21 made of hexahedron, the temperature inside the cold insulation container 21 can be kept low. Therefore, these articles can be transported while maintaining the temperature of the articles that require refrigeration or freezing, such as foodstuffs, pharmaceuticals, and industrial products. For example, the cold storage container 21 can be applied to the transportation of food to a grocery store or a restaurant.

  When the cold insulation container 21 is not used, it is not necessary to enclose the heat insulating gas in the hollow wall 22, so that the cold insulating container 21 in which the heat insulating gas is not enclosed can be folded to be compact. Moreover, the cold insulation container 21 which concerns on this embodiment functions as a balloon container in the state in which the heat insulation gas was inject | poured. Since this balloon container can absorb an impact, it can also be used for supplying supplies from the aircraft to the ground in an emergency such as a disaster. Further, by enclosing a heat insulating gas having an extremely low thermal conductivity in the hollow wall 22, it is possible to convey the article while maintaining an extremely low temperature.

  FIG. 13 is a rear view showing another embodiment of the cold container 21. The configuration of the present embodiment that is not specifically described is the same as that of the embodiment shown in FIGS. In the cold storage container 21 shown in FIG. 13, the interiors of the six hollow walls 22 are not in communication, and the interiors of the hollow walls 22 form independent spaces.

  Each of the six hollow walls 22 has a gas inlet 41 and a gas outlet 43 communicating with each other. That is, each of the upper wall 22A, the bottom wall 22B, the right side wall 22C, the left side wall 22D, the front wall 22E, and the rear wall 22F has a gas inlet 41 and a gas outlet 43 that communicate with the inside. The gas discharge port 43 is composed of a check valve. A heat insulating gas such as carbon dioxide gas is injected into each hollow wall 22 through each gas injection port 41. The adiabatic gas is supplied to the inside of the hollow wall 22 while expelling the air existing inside each hollow wall 22 through the gas discharge port 43 until the inside of each hollow wall 22 is filled with the adiabatic gas.

  The front wall 22E that functions as an openable / closable door is connected to the right side wall 22C by a plurality of hinges 44. Unlike the hinge 32 having a hollow structure in the above-described embodiment, these hinges 44 do not have a hollow structure.

  The cold storage container 21 according to the present embodiment increases the number of parts because each hollow wall 22 has the gas inlet 41 and the gas outlet 43, but has a structure for communicating the hollow walls 22 with each other. Since it is unnecessary, there is an advantage that the entire structure of the cold container 21 can be simplified and the manufacturing cost is reduced.

  Next, still another embodiment of the present invention will be described. FIG. 14 is a front perspective view showing still another embodiment of the cold insulated container of the present invention. 15 is a rear view of the cold container shown in FIG. The cold storage container 51 of the present embodiment has a plurality of walls 52A to 52F that form a closed space for storing articles therein. The cold storage container 51 according to the present embodiment is a hexahedron composed of six walls: an upper wall 52A, a bottom wall 52B, a right wall 52C, a left wall 52D, a front wall 52E, and a back wall 52F. When referring to the plurality of walls 52 </ b> A to 52 </ b> F without particular distinction, they are simply referred to as walls 52. One of the plurality of walls 52 is configured to be openable and closable. In the present embodiment, the front wall 52E constitutes a door that can be opened and closed. FIG. 16 is a perspective view showing a state in which the front wall 52E is open.

  Each of the plurality of walls 52 is composed of a reinforced corrugated cardboard having a flow path formed therein. Reinforced cardboard has a higher strength than ordinary cardboard, and such reinforced cardboard can be obtained on the market. FIG. 17 is a view showing a cross section of a wall 52 made of reinforced corrugated cardboard. As shown in FIG. 17, the reinforced corrugated cardboard is basically composed of a corrugated paper 53 called a core and a paperboard 54 called a liner attached to both sides of the corrugated paper 53. A space 57 is formed between the corrugated paper 53 and the paperboards 54 on both sides thereof. This space 57 forms a flow path for circulating and storing the heat insulating gas. In the following description, this space is referred to as a flow path and is denoted by reference numeral 57. The flow paths 57 communicate with each other through a communication hole (not shown).

  In the embodiment shown in FIG. 17, the entire surface of the reinforced corrugated cardboard constituting each wall 52 is composed of the above-described paperboard 54 called a liner. Furthermore, the aluminum vapor deposition sheet is affixed on the entire surface of the reinforced cardboard (that is, the outer surface of the paperboard 54). A communication hole 60 is formed in each wall 52 so that the flow path 57 formed inside the wall 52 communicates with the flow path 57 formed inside the adjacent wall 52. The communication hole 60 is connected to a plurality of flow paths 57 formed inside the wall 52. The adjacent wall 52 is also provided with a communication hole 60 at the same position. Therefore, when the two walls 52 are combined, the communication holes 60 are connected, and the flow paths 57 of the two walls 52 are connected.

  As shown in FIG. 18, one wall 52 may be formed by bonding a plurality of reinforced cardboards. In the embodiment shown in FIG. 18, three reinforced cardboards 55 are combined to form one wall 52. However, two reinforced cardboards may be combined, or four or more reinforced cardboards may be combined. Good. Further, as shown in FIG. 19, when one wall 52 is constituted by a combination of at least three reinforced cardboards 55, one of the reinforced cardboards 55 sandwiched between the other two reinforced cardboards 55 is provided. The channel 57 for the adiabatic gas described above may be formed by cutting out the portion.

  All the channels 57 of the six walls 52 communicate with each other through the communication hole 60. Among the six walls 52, the top wall 52A, the bottom wall 52B, the right side wall 52C, the left side wall 52D, and the back wall 52F are connected by an adhesive, and the front wall 52E that functions as a door that can be opened and closed is illustrated in FIG. As shown in FIG. 14, it is connected to the right side wall 52C by an adhesive tape 62 that functions as a hinge. A hook-and-loop fastener 63 as a door lock is attached to the front wall 52E and the right side wall 52C. A check valve 65 is attached to the lower part of the front wall 52E that functions as a door. The check valve 65 communicates with a flow path 57 (see FIGS. 17 to 19) formed inside the front wall 52E.

  As shown in FIG. 20, the six walls 52 may all be connected. FIG. 20 shows a development view of the cold container 51. Two adjacent walls 52 are connected to each other, and the six walls 52 are created in a state of being expanded in a plane. Since the cold storage container 51 can be sent to the user in the expanded state shown in FIG. 20, the transportation cost can be reduced. Then, as shown in FIG. 21, the cold container 51 is assembled at the destination. FIG. 22 is a diagram illustrating the cold storage container 51 that has been assembled.

  FIG. 23A to FIG. 23C are enlarged cross-sectional views showing a connection portion between two adjacent walls 52 shown in FIG. First, as shown in FIG. 23 (a), a straight cut 56 is made at an angle of 45 degrees on the surface of one wall 52, and only the paperboard (liner) 54 is left. Next, as shown in FIG. 23B, the wall 52 is bent around the notch 56 with the paperboard (liner) 54 as a hinge. As shown in FIG. 23 (c), the wall 52 is bent at a right angle until the notch 56 disappears, and the mating surfaces of the walls 52 are joined with an adhesive so as not to block the flow path 57 (see FIGS. 17 to 19). To do.

  In addition, the cold insulation container 21 which is an embodiment of the balloon container shown in FIGS. 6 to 13 may be structured such that these walls are assembled after being manufactured in a state of being separated for each wall, or all the walls may be assembled. A structure that is integrated and assembled as shown in a development view of FIG. 20 may be adopted.

  FIG. 24 is a cross-sectional view showing the upper part of the cold container 51. A heat insulating gas inlet 71 that penetrates the back wall 52F is formed in the back wall 52F. The heat insulating gas inlet 71 may be provided in the right side wall 52C or the left side wall 52D. The rear wall 52F is provided with a shutter 72 that closes the heat insulating gas inlet 71. The shutter 72 has a tapered cross section, and the outer surface of the shutter 72 is formed of a tapered surface. The shutter 72 is made of resin, for example, and is closed by its own weight.

  The back wall 52 </ b> F has a gas inlet 58 that faces the heat insulating gas inlet 71. The gas inlet 58 communicates with a flow path 57 and an adiabatic gas inlet 71 formed inside the back wall 52F. In addition, in FIG. 24, the flow path 57 is drawn typically. The shutter 72 is disposed outside the gas inlet 58. Therefore, when the shutter 72 is closed, the gas inlet 58 is isolated from the external atmosphere by the shutter 72.

  The heat insulating gas inlet 71 communicates with a closed space (hereinafter referred to as a storage space) formed inside the cold storage container 51 for storing articles. In this storage space, a breathable snow dry ice tray 78 is arranged. More specifically, a snow dry ice tray 78 is disposed in the upper part of the storage space. The heat insulating gas inlet 71 is adjacent to the snow dry ice tray 78. In this embodiment, carbon dioxide is used as the heat insulating gas, and the carbon dioxide is supplied to the cold container 51 from a liquefied carbon dioxide supply device provided separately from the cold container 51 in the form of liquefied carbon dioxide. As this liquefied carbon dioxide supply device, for example, the “container cooling device” described in Patent Document 2 described above is used. In the present embodiment, carbon dioxide gas is used as the heat insulating gas, but it is possible to use a gas other than carbon dioxide gas as long as the thermal conductivity is lower than that of air.

  FIG. 25A and FIG. 25B are diagrams illustrating a state in which liquefied carbon dioxide gas is supplied from the liquefied carbon dioxide gas supply device to the cold container 51. As shown in FIG. 25 (a), the tip of the gas injection nozzle 81 of the liquefied carbon dioxide supply device has a tapered shape like the shutter 72. When the gas injection nozzle 81 hits the taper surface of the shutter 72, the gas injection nozzle 81 pushes up the shutter 72, and the gas injection nozzle 81 can enter the inside of the cold container 51 as shown in FIG. .

  A seal member 83 is attached to the base of the gas injection nozzle 81. Until the sealing member 83 closes the heat insulating gas inlet 71, the gas injection nozzle 81 can enter the storage space of the cold container 51 and approach the snow dry ice tray 78. The gas injection nozzle 81 injects the liquefied carbon dioxide gas into the cold container 51 in a state where the heat insulating gas injection port 71 is blocked by the seal member 83. The liquefied carbon dioxide gas is sprayed toward the snow dry ice tray 78 to form snow dry ice on the snow dry ice tray 78. The snow dry ice tray 78 has a breathable bottom. For example, a mesh may be formed at the bottom of the snow dry ice receiver 78, or the bottom of the snow dry ice receiver 78 may be formed of a perforated plate. The carbon dioxide gas sublimated from the snow dry ice descends the bottom of the snow dry ice receiver 78 as cold air, and cools the storage space of the cold container 51.

  Excess carbon dioxide contained in the liquefied carbon dioxide injected from the gas injection nozzle 81 enters the flow path 57 in the back wall 52F from the gas inlet 58 while expelling air existing in the storage space of the cold container 51. To do. The carbon dioxide gas flows through the flow channel 57 while expelling air existing in the flow channel 57, and the flow channel 57 is eventually filled with carbon dioxide gas. Since the channels 57 of all the walls 52 communicate with each other through the communication hole 60, the channels 57 of all the walls 52 are filled with carbon dioxide gas. The air existing in the storage space of the cold insulation container 51 and the flow path 57 of the wall 52 is smoothly discharged out of the cold insulation container 51 through the check valve 65. Since the carbon dioxide gas at this time has a low temperature accompanying the generation of snow dry ice at about −80 ° C., the wall 52 can be cooled at the same time as the air existing in the flow path 57 is pushed out. Therefore, the low-temperature carbon dioxide gas can efficiently cool the cold insulation container 51 that has been exposed to direct sunlight such as summer and has become hot. This eliminates the need to put the cold container 51 into the refrigerated warehouse and precool it, so that there is no need for the refrigerated warehouse for precooling, and at the same time, the operation efficiency of the cold container 51 is increased. In addition, if the temperature is kept for the same time, the amount of snow dry ice can be reduced compared to the conventional heat insulation method, which is more efficient.

  When the injection of the liquefied carbon dioxide gas is finished, the gas injection nozzle 81 is pulled out from the heat insulating gas injection port 71. At the same time, the shutter 72 descends by its own weight and closes the adiabatic gas inlet 71. Since the gas inflow port 58 communicating with the flow path 57 is located inside the shutter 72, leakage of carbon dioxide gas to the outside of the cold container 51 is prevented by the shutter 72. The shutter 72 is only closed by its own weight and does not completely seal the storage space of the cold container 51. However, if the carbon dioxide gas fills the flow path 57 only during the assumed transfer time, the cold container 51 is closed. The purpose of can be achieved. Further, during the transport of the cold container 51, the snow dry ice gradually sublimes to generate carbon dioxide gas and flows into the flow path 57 of the wall 52 through the gas inlet 58, so that the cold capacity of the cold container 51 is maintained. The

  Conventional cold storage containers are made of metal such as aluminum or iron to increase the overall strength, and have a structure in which a heat insulating material such as polystyrene foam or urethane is embedded inside the wall, resulting in a large weight and cost. Was also expensive. The cold insulation container 51 of the present embodiment is configured by using a lightweight and inexpensive reinforced corrugated cardboard instead of metal to form the wall 52, and by adopting a heat insulating gas instead of a heat insulating material, Weight reduction and cost reduction can be realized.

  As a material constituting the wall 52, a material having a light weight and high strength may be used in addition to the reinforced cardboard as long as the flow path 57 can be formed inside. For example, a material using a material that reproduces the structure of a paper cardboard (hollow structure) made of resin or the like found in plastic corrugated cardboard, etc. As an example of the combination, reinforced corrugated cardboard or plastic corrugated cardboard is used for the outer wall, and the core material is polycarbonate. It is possible to use a material having a hollow structure that can store heat insulating gas by combining existing materials, such as corrugated plates of materials.

  As shown in FIGS. 26 and 27, an air-permeable filler 85 may be disposed in a flow path 57 formed inside the wall 52. FIG. 26 shows a wall 52 made of reinforced cardboard, and FIG. 27 shows a wall 52 made of plastic cardboard. In the flow path 57 formed in the wall 52, the air-permeable filler 85 does not disturb the flow of the heat insulating gas such as carbon dioxide gas, while preventing the convection in the flow path 57 of the heat insulating gas. it can. Since the filler 85 prevents the convection of the heat insulating gas, the heat insulating function of the wall 52 filled with the heat insulating gas can be enhanced. Examples of the filler 85 include a sponge having open cells, a particulate resin having a diameter of about 3 mm to 5 mm, and a fibrous material such as glass wool or nonwoven fabric.

  FIG. 28 is a front view showing another embodiment of the cold storage container 51. FIG. 29 is a rear view of the cold container 51 shown in FIG. 28, and FIG. 30 is a perspective view showing a state in which the front wall 52E is open. The configuration of the present embodiment that is not specifically described is the same as that of the embodiment shown in FIGS. In the cold container 51 shown in FIG. 28, the flow paths 57 (see FIGS. 17 to 19) formed in the six walls 52 do not communicate with each other, and the flow paths 57 of the walls 52 form independent spaces. doing.

  Each of the six walls 52 has a gas inlet 58 and a gas outlet 86 communicating with the flow path 57 inside thereof. That is, each of the upper wall 52A, the bottom wall 52B, the right side wall 52C, the left side wall 52D, the front wall 52E, and the rear wall 52F has a gas inlet 58 and a gas outlet 86 that communicate with the inside. The six gas inlets 58 are respectively formed on the inner surfaces of the six walls 52 and communicate with the heat insulating gas inlet 71 through the storage space of the cold container 51. The gas discharge port 86 is composed of a check valve. In the present embodiment, the communication hole 60 shown in FIGS. 17 to 19 is not provided.

  The adiabatic gas is injected into the storage space of the cold container 51 through the adiabatic gas inlet 71 shown in FIG. 30 and flows into the flow path 57 (see FIGS. 17 to 19) in each wall 52 through the gas inlet 58. The heat insulating gas is stored in the cold container 51 while the air existing in the cold container 51 is driven out through the gas discharge port 86 until the storage space of the cold container 51 and the flow path 57 in the wall 52 are filled with the heat insulating gas. It is supplied to the channel 57 in the space and wall 52.

  The cold storage container 51 according to the present embodiment increases the number of parts because each wall 52 has the gas inlet 58 and the gas outlet 86, but a structure for connecting the walls 52 to each other is not necessary. Therefore, there is an advantage that the entire structure of the cold storage container 51 can be simplified and the manufacturing cost is reduced.

  FIG. 31 is a perspective view showing a cart 90 for carrying the cold container 51 according to the embodiment shown in FIGS. 14 to 16 and the embodiment shown in FIGS. 28 to 30. This cart 90 is not essential, and is used when the cold insulation container 51 requires further strength.

  The cart 90 includes a base 91 on which the cold container 51 is placed, four wheels 92 attached to the base 91, a frame 93 extending upward from the base 91, and a door 95 rotatably supported by the frame 93. I have. The wheel 92 is a caster configured to be freely changeable in direction. The carriage 90 provided with these wheels 92 is movable.

  The frame 93 is disposed to face the right side wall 52C, the left side wall 52D, and the back wall 52F of the cold storage container 51. A handle 97 is attached to the right side of the frame 93. Although not shown in the drawing, handles are also attached to the left side and the back side of the frame 93. Further, a handle 98 is also attached to the door 95. Thus, since the handle is attached to each of the front side, both sides, and the back side of the cart 90, when the cold insulated container 51 is carried, no load is applied to the cold insulated container 51 itself. The door 95 is higher than the frame 93 and has substantially the same height as the front wall 52E of the cold container 51. A lock mechanism 99 is attached to the door 95. When the lock mechanism 99 is engaged with the frame 93, the door 95 is closed. The carriage 90 is made of metal.

  FIG. 32 is a perspective view showing a container assembly (container assembly) composed of the cart 90 shown in FIG. 31 and the cold insulation container 51 installed on the cart 90. FIG. It is a perspective view which shows the state which opened the door 95 and the front wall 52E of the cold storage container 51. FIG. The right side wall 52C, the left side wall 52D, and the rear wall 52F of the cold container 51 are supported by a frame 93. The door 95 of the cart 90 has a shape that can be fitted into the four sides of the front wall 52E of the cold container 51, and the front wall 52E is supported by the door 95 of the cart 90. The door 95 of the cart 90 and the front wall 52E of the cold container 51 can be integrally opened and closed. Therefore, as shown in FIG. 33, the cold insulation container 51 can be opened while the cold insulation container 51 is placed on the carriage 90.

  The container assembly according to this embodiment is about 50% lighter than the conventional structure in which wheels are attached to a metal cold insulated container, and the manufacturing cost can be reduced by about 70% compared to the conventional case. . In addition, the cold container 51 made of reinforced corrugated cardboard can ensure almost the same strength as a conventional metal cold container.

  The embodiment described above is described for the purpose of enabling the person having ordinary knowledge in the technical field to which the present invention belongs to implement the present invention. Various modifications of the above embodiment can be naturally made by those skilled in the art, and the technical idea of the present invention can be applied to other embodiments. Accordingly, the present invention is not limited to the described embodiments, but is to be construed in the widest scope according to the technical idea defined by the claims.

DESCRIPTION OF SYMBOLS 1 Cold storage container 2,2A-2F Wall 6 Bag 7A, 7B Corrugated cardboard 9 Gas inlet 21 Cold storage container 22,22A-22F Hollow wall 26 Partition 27 Through-hole 32 Hinge 35 Surface fastener 37 Protrusion part 38 Space 39 Through-hole 41 Gas injection Inlet 42 Safety valve 43 Gas outlet 44 Hinge 51 Cold storage containers 52, 52A to 52F Wall 53 Corrugated paper 54 Paperboard 56 Notch 57 Channel 58 Gas inlet 60 Communication hole 62 Adhesive tape 63 Surface fastener 71 Insulating gas inlet 72 Shutter 78 Snow dry ice receptacle 81 Gas injection nozzle 83 Seal member 86 Gas discharge port 90 Bogie 91 Base 92 Wheel 93 Frame 95 Door 97 Handle 98 Handle 99 Lock mechanism

Claims (20)

Comprising a plurality of walls forming a closed space for storing articles;
Each of the plurality of walls includes a bag in which a heat insulating gas having a lower thermal conductivity than air is enclosed, and an inner covering plate and an outer covering plate that sandwich the bag,
The bag is composed of a film that does not allow the insulating gas to pass through,
The cold storage container, wherein the inner cover plate and the outer cover plate are made of paper cardboard, reinforced cardboard, or plastic cardboard.   The cold insulation container according to claim 1, wherein the plurality of walls are six walls constituting a hexahedron. A plurality of hollow walls forming a closed space for storing articles;
In the plurality of hollow walls, a heat insulating gas having a lower thermal conductivity than air is enclosed inside,
The plurality of hollow walls are made of a flexible sheet.   The cold storage container according to claim 3, wherein the insides of the plurality of hollow walls communicate with each other. The first hollow wall and the second hollow wall included in the plurality of hollow walls are connected to each other by a hinge having a space formed therein,
The cold storage container according to claim 4, wherein the inside of the first hollow wall and the inside of the second hollow wall communicate with each other through a space in the hinge. Any one of the plurality of hollow walls is provided with a gas inlet for injecting the heat insulating gas into the plurality of hollow walls,
Any one of the plurality of hollow walls is provided with a safety valve that opens when the pressure of the heat insulating gas injected into the plurality of hollow walls exceeds a set value. The cold storage container according to claim 4 or 5.   The interior of the plurality of hollow walls forms a space independent from each other, and each of the plurality of hollow walls has a gas inlet and a gas outlet that communicate with the interior thereof. Cold storage container as described in.   The cold storage container according to claim 7, wherein the gas discharge port includes a check valve.   The partition wall is formed in at least one of the plurality of hollow walls, and the partition wall is formed with a through hole that allows passage of heat insulating gas. The cold storage container as described in any one of Claims. Comprising a plurality of walls forming a closed space for storing articles;
Each of the plurality of walls has a flow path therein,
One of the plurality of walls is formed with a heat insulating gas injection port penetrating the wall,
At least one of the plurality of walls has a gas inlet, and the gas inlet communicates with the heat insulating gas inlet and the flow path.   The cold storage container according to claim 10, wherein the flow paths respectively formed inside the plurality of walls communicate with each other.   The cold storage container according to claim 10 or 11, wherein a check valve communicating with the flow path is provided on one of the plurality of walls.   The flow paths formed inside the plurality of walls each form an independent space, and each of the plurality of walls has a gas inlet and a gas outlet that communicates with the flow path. The cold storage container according to claim 10.   The cold storage container according to claim 13, wherein the gas inflow port is formed on an inner surface of the plurality of walls and communicates with the heat insulating gas inlet through the closed space.   The cold storage container according to claim 13 or 14, wherein the gas discharge port includes a check valve.   The cold insulation container according to any one of claims 10 to 15, wherein each of the plurality of walls is made of reinforced cardboard or plastic cardboard in which a flow path is formed. In the closed space, a breathable snow dry ice tray is arranged,
The cold insulation container according to any one of claims 10 to 16, wherein the heat insulating gas inlet is adjacent to the snow dry ice tray. A shutter for closing the insulating gas inlet,
The cold storage container according to any one of claims 10 to 17, wherein the shutter is disposed outside the gas inlet.   The cold container according to any one of claims 10 to 18, wherein an air-permeable filler is disposed in the flow path. A movable carriage with wheels,
A cold insulation container according to claim 10 to 19 mounted on the carriage,
The container has a frame that supports both side walls and a back wall of the cold container, and a door that supports the front wall of the cold container.

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