JP2018059597A - Cold and heat insulation box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cold and heat insulation box having a simple structure and capable of suppressing deterioration of heat bridge or airtightness on a connection surface of a door part to maintain excellent adiabaticity.SOLUTION: A cold and heat insulation box 100 includes: a front plate part 150 containing a heat insulation layer and constituting a wall surface; and a front door part 160 containing a heat insulation layer, capable of being opened/closed by rotating with respect to the front plate part 150 around a linear rotational center, and arranged on the same plane as the front plate part 150 in a closed state. On a cross section orthogonal to the rotational center, a boundary line between the front plate part 150 and the front door part 160 is bent in the state where the front door part 160 closes.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a cold insulation box.

  For example, when a frozen food or the like is delivered, it is possible to place a load at a constant temperature even during loading / unloading work, etc., by using a cold insulation box with high heat insulation. In the cold insulation box, in order to improve the heat insulation characteristics, it is necessary to suppress a heat bridge and a decrease in airtightness on the joint surface of the door as much as possible.

  Patent Document 1 discloses a technique for securing strength and heat insulation properties by disposing a movable spacer at a bending portion of a folding box.

JP 2014-69807 A

  However, in the configuration in which a movable member as in Patent Document 1 is newly added, the structure becomes complicated, and thus the manufacturing cost increases.

  An object of the present invention is to provide a cold insulation box that has a simple structure and can maintain a good heat insulating property by suppressing a reduction in heat bridge and airtightness on a joint surface of a door portion.

  The present invention solves the above problems by the following means. In addition, in order to make an understanding easy, although the code | symbol corresponding to embodiment of this invention is attached | subjected and demonstrated, it is not limited to this.

  The first invention is a cold insulation box (100) configured in a box shape, including a heat insulating material layer (153, 154, 155, 163, 164, 165), and a wall portion (150) constituting a wall surface And a heat insulating material layer (153, 154, 155, 163, 164, 165), can be rotated and opened with respect to the wall (150) around a linear rotation center, and when closed, A door portion (160) disposed on the same plane as the wall portion (150), and the wall portion (150) in a closed state of the door portion (160) in a cross section orthogonal to the rotation center. It is a cold insulation box (100) where the boundary line with the door (160) is bent.

  A second aspect of the invention is the cold insulation box (100) according to the first aspect of the invention, wherein the wall portion (150) serving as a boundary line in the closed state of the door portion (160) in a cross section orthogonal to the rotation center. ) And the end of each of the door portions (160) are formed in a stepped shape that gradually decreases in height toward the outside of the cold insulation box (100) when the door portion (160) is open. This is a cold insulation box (100).

  According to a third aspect of the present invention, in the cold insulation box (100) according to the second aspect, at least a part of the end portions of the wall portion (150) and the door portion (160) has a warning display. (103) is provided, and it is a cold and insulated box (100) characterized by the above-mentioned.

  According to a fourth aspect of the present invention, in the cold insulation box (100) according to any one of the first to third aspects, the wall portion (150) and the door portion (160) are each the heat insulating material. In addition to the layers (153, 154, 155, 163, 164, 165), an outer layer (151, 152, 161, 162) constituting the surface of the cold insulation box (100) is provided, and the bending of the boundary line Is characterized in that the end face positions of the heat insulating material layers (153, 154, 155, 163, 164, 165) and the outer layers (151, 152, 161, 162) are shifted and arranged. This is a cold insulation box (100).

  ADVANTAGE OF THE INVENTION According to this invention, it is a simple structure, Comprising: It can provide the cold insulation warm box which can suppress the heat bridge in the joint surface of a door part, and the fall of airtightness, and can maintain favorable heat insulation.

1 is a perspective view showing an embodiment of a cold insulation box 100 according to the present invention with all doors closed. FIG. 1 is a perspective view showing an embodiment of a cold insulation box 100 according to the present invention with all doors open. FIG. It is sectional drawing cut | disconnected in the position of arrow AA shown in FIG. FIG. 4 is an enlarged view showing a latch mechanism provided at a joint portion between a front door portion 160 and a right side plate portion 120. It is the figure which showed the state which the front door part 160 opened in the cross section similar to FIG. It is the figure which showed the state which the front door part 160 opened based on the cross section of FIG. 5 as an oblique projection figure.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

(Embodiment)
FIG. 1 is a perspective view showing an embodiment of a cold insulation box 100 according to the present invention with all doors closed.
FIG. 2 is a perspective view showing an embodiment of the cold insulation box 100 according to the present invention with all doors open.
In addition, each figure shown below including FIG. 1 is the figure shown typically, and the magnitude | size and shape of each part are exaggerated suitably for easy understanding.
In the following description, specific numerical values, shapes, materials, and the like are shown and described, but these can be changed as appropriate.
Moreover, in FIG. 1, FIG. 2 and the following description, in order to understand easily, the vertical direction in the normal use state of the cold insulation box 100 is set as the Z direction, and the front-rear direction in the horizontal direction is set as the X direction. The left-right direction orthogonal to the front-rear direction is defined as the Y direction. The vertical upper side of the vertical direction is the + Z side, the vertical lower side is the -Z side, the front side of the front and rear direction is the + X side, the rear side is the -X side, the right side of the left and right direction is the + Y side, and the left side is -Y side.

The cold insulation warm box 100 is a box having a heat insulating effect for accommodating a stored item that needs to be kept warm, such as a frozen product or a heated product. As shown in FIG. 1, the cold insulation box 100 of this embodiment is arrange | positioned on the pallet 500 for conveyance, and the cold insulation box 100 which accommodated the some accommodated thing can be conveyed with a forklift.
A claw hole 501 that penetrates the opposite side surface is provided on the side surface of the transport pallet 500, and the claw portion of the forklift is inserted into the claw hole 501, so that the cold insulation box 100 together with the transport pallet 500 is provided. Can be moved.
As shown in FIGS. 1 and 2, the cold insulation box 100 is a box provided with doors on the front side (+ X side) and on the upper side (+ Z side).

  The cold insulation box 100 includes a bottom plate portion 110, a right side plate portion 120, a left side plate portion 130, a back plate portion 140, a front plate portion 150, a front door portion 160, an upper plate portion 170, and an upper door portion. 180 is combined to form a box shape.

The bottom plate part 110 is a rectangular plate member that forms the bottom surface (the surface on the −Z side) of the cold insulation box 100.
The right side plate portion 120 is a rectangular plate member that forms the right side surface (+ Y side surface) of the cold insulation box 100.
The left side plate portion 130 is a rectangular plate member that forms the left side surface (the surface on the −Y side) of the cold insulation box 100.
The back plate part 140 is a rectangular plate member that forms the back surface (the surface on the −X side) of the cold insulation box 100.

The front plate portion (wall portion) 150 is a rectangular plate member that is on the vertical lower side (−Z side) of the front surface (+ X side surface) of the cold insulation box 100 and forms a wall surface.
The front door portion (door portion) 160 is a rectangular plate member that forms the vertical upper side (+ Z side) of the front surface of the cold insulation box 100. The front door portion 160 is attached to the front plate portion 150 using a hinge 101 so that the front door portion 160 can be opened and closed with respect to the front plate portion 150. Therefore, the front door portion 160 can be opened and closed by rotating around a linear rotation center around the rotation center axis of the hinge 101. When the front door portion 160 is closed, the front door portion 160 is disposed on the same plane as the front plate portion 150.

The upper plate portion 170 is a rectangular plate member that forms the rear (−X side) of the upper surface (+ Z side surface) of the cold insulation box 100.
The upper door portion 180 is a rectangular plate member that forms the front (+ X side) of the upper surface (+ Z side surface) of the cold insulation box 100. The upper door portion 180 is attached to the upper plate portion 170 using a hinge 102 so that the upper door portion 180 can be opened and closed with respect to the upper plate portion 170.

Here, the bottom plate portion 110, the right side plate portion 120, the left side plate portion 130, the back plate portion 140, the front plate portion 150, the front door portion 160, the upper plate portion 170, and the upper door portion 180, All of them incorporate a heat insulating material layer on the inner side.
FIG. 3 is a cross-sectional view taken along the line AA shown in FIG.
The front plate portion 150 includes a frame 151, an outer plate 152, a vacuum heat insulating material 153, a foam heat insulating material 154, and a heat shield film 155.

  The frame 151 is made of, for example, a metal material such as aluminum, and is mainly configured to ensure the strength of the entire front plate portion 150. The frame 151 is formed in a frame shape substantially along the outer shape of the front plate portion 150.

The outer plate 152 is inserted and held in a groove portion 151 a formed in the frame 151. The outer plate 152 is provided to protect the vacuum heat insulating material 153 and the foamed heat insulating material 154 provided on the front plate portion 150 and to have sufficient rigidity as a member constituting the front plate portion 150. Moreover, it is desirable that the outer plate 152 be made of a material having low thermal conductivity in order to improve heat insulation. Therefore, for the outer plate 152, for example, a plywood, a foaming agent, a resin plate, an embossed resin sheet, a paperboard, or the like can be used. The outer plate 152 is desirably made of a resin plate (for example, plastic cardboard or a curing material) from the viewpoint of reducing the weight and volume of the front plate portion 150.
The frame 151 and the outer plate 152 described above constitute an outer layer that constitutes the surface of the cold insulation box 100.

The vacuum heat insulating material 153 includes a core material 153a and an exterior material 153b.
As the core material 153a, a material used for a core material of a conventionally known vacuum heat insulating material can be used. For example, a powder such as silica, a foam such as urethane polymer, a fiber such as glass wool, etc. The porous body can be used. From the viewpoint of obtaining a core material having low thermal conductivity, the porous body preferably has a porosity of 50% or more, and more preferably 90% or more.
Further, the core material 153a may include a getter agent for adsorbing a minute amount of moisture or gas entering from the outside. Examples of the getter agent include general materials used for vacuum heat insulating materials such as silica, alumina, zeolite, activated carbon and the like.
The thickness of the core material 153a is not particularly limited as long as a desired heat insulating effect can be exhibited. For example, it is preferably in the range of 1 mm to 20 mm, particularly 5 mm to 12 mm in a state after decompression.

The exterior material 153b is a member that covers the outer periphery of the core material 153a, and is a flexible sheet in which a heat welding layer and a gas barrier layer are sequentially laminated from the core material.
The gas barrier layer has a function of blocking the entry of gas such as water, oxygen, and nitrogen from the outside. Examples of the gas barrier layer include a metal foil, a vapor deposition film in which a vapor deposition layer is formed on one surface of a resin film, and the like.
Examples of the metal material for the metal foil include aluminum, nickel, stainless steel, iron, copper, and titanium.

Moreover, as resin which forms the resin film used for a vapor deposition film, polyvinyl alcohol resin (PVA), polyamide resin (PA), ethylene vinyl alcohol copolymer resin (EVOH), polyethylene terephthalate resin (PET) etc. are mentioned. . Examples of the material constituting the vapor deposition layer include metals, metal oxides, metal nitrides, inorganic compounds such as silicon oxide, and the like.
The vapor deposition film may have a gas barrier coating film formed on the vapor deposition layer. Examples of the gas barrier coating film include a coating film formed of a barrier composition containing a water-soluble polymer such as PVA and a metal alkoxide and polycondensed by a sol-gel method.

The gas barrier layer may be a single layer or a multilayer in which layers having the same composition or different compositions are laminated. The thickness of the gas barrier layer is not particularly limited as long as the gas barrier property can be exhibited, and is, for example, about 9 μm to 100 μm.
The gas barrier layer may be subjected to surface treatment such as corona discharge treatment, flame treatment, plasma treatment, and ozone treatment. This is because the surface treatment can improve the gas barrier performance and the adhesion with other layers.
As the gas barrier property of the gas barrier layer, the oxygen permeability is preferably 0.5 cc · m−2 · day−1 or less, more preferably 0.1 cc · m−2 · day−1 or less. Further, the water vapor permeability is preferably 0.2 cc · m−2 · day−1 or less, and more preferably 0.1 cc · m−2 · day−1 or less. By setting the oxygen and water vapor permeability within the above ranges, it is possible to make it difficult for moisture, gas, and the like that have entered the vacuum heat insulating material 153 to enter the core material.

  The oxygen permeability is a value measured using an oxygen permeability measuring device (manufactured by Mocon, USA, OXTRAN) under the conditions of a temperature of 23 ° C. and a humidity of 90% RH based on JIS K7126B. is there. Further, the water vapor permeability is a value measured using a water vapor permeability measuring apparatus (manufactured by MOCON, USA, PERMATRAN) under the conditions of a temperature of 40 ° C. and a humidity of 90% RH.

When the core material 153a is sealed with the exterior material 153b, the heat-welded layer has a function of thermally welding and sealing the periphery of the exterior material 153b. Examples of the material for the heat welding layer include polyolefin resins such as polyethylene and unstretched polypropylene (CPP), polyvinyl acetate resins, polyvinyl chloride resins, poly (meth) acrylic resins, and urethane resins. .
The said heat welding layer may contain other materials, such as an anti blocking agent, a lubricant, a flame retardant, and an organic filler.
The melting point of the heat-welded layer is preferably a temperature at which the bonded surface can have an adhesive force that does not peel off in a use environment. The melting point is, for example, preferably in the range of 80 ° C to 300 ° C, and more preferably in the range of 100 ° C to 250 ° C.

The exterior material 153b preferably has a protective layer. This is because by having the protective layer, the heat welding layer and the gas barrier layer can be protected, and the inside of the vacuum heat insulating material 153 can be protected together. The protective layer can be the outermost layer of the vacuum heat insulating material 153 by disposing the protective layer on the side opposite to the heat welding layer side with respect to the gas barrier layer.
The protective layer preferably has sufficient strength and is excellent in heat resistance, moisture resistance, pinhole resistance, puncture resistance, and the like. Examples of the material for the protective layer include nylon resins, polyester resins such as polyethylene terephthalate and polyethylene naphthalate, polyamide resins, polyolefin resins such as polypropylene, acrylic resins, cellulose resins, and ethylene-vinyl alcohol copolymers. Etc.

The protective layer may be in the form of a sheet, or may be in the form of a uniaxially or biaxially stretched film. The protective layer may be a single layer or a laminate in which layers made of the same material or layers made of different materials are laminated.
The protective layer may be subjected to surface treatment such as corona discharge treatment, flame treatment, plasma treatment, ozone treatment, etc., in order to improve adhesion with other layers.
The thickness of the protective layer is not particularly limited as long as it can protect the heat-welded layer and the gas barrier layer, and can be, for example, about 5 μm to 80 μm.
Further, the exterior material 153b may have an arbitrary layer such as an anchor coat layer, a pinhole resistant layer, an interlayer adhesive layer, in addition to the protective layer described above. As the adhesive used for the interlayer adhesive layer, for example, an adhesive for laminating disclosed in JP 2010-284854 A can be used.

The exterior material 153b may have a plurality of protective layers and gas barrier layers. For example, two or more gas barrier layers may be provided between the heat welding layer and the protective layer, and two or more protective layers may be provided on the gas barrier layer. Further, another protective layer may be provided between the heat welding layer and the gas barrier layer.
Each layer constituting the exterior material 153b may be laminated via the above-described interlayer adhesive layer, or adjacent layers may be directly adhered and laminated.
The said exterior material may have transparency and does not need to have it, and can be suitably set according to a use. The transparency of the exterior material is not defined by a strict transmittance, and can be appropriately determined according to the application.
The gas barrier property of the exterior material depends on the gas barrier property of the gas barrier layer.

  As an internal vacuum degree of the vacuum heat insulating material 153, what is necessary is just to exhibit desired heat insulation, for example, it is preferable that it is 5 Pa or less. This is because the convection of air inside the vacuum heat insulating material 153 can be cut off and the heat insulating performance can be improved.

The heat conductivity (initial heat conductivity) of the vacuum heat insulating material 153 is, for example, 15 mW · m−1 · K−1 or less, particularly 10 mW · m−1 · K−1 or less, particularly 5 mW · m− in a 25 ° C. environment. It is preferable that it is 1 * K-1 or less. This is because the vacuum heat insulating material 153 becomes difficult to conduct heat to the outside, and a high heat insulating effect can be achieved. The thermal conductivity is a value measured by a heat flow meter method using a thermal conductivity measuring device Auto Lambda (HC-074 manufactured by Eiko Seiki Co.) according to JIS A1412-3.
Here, the vacuum heat insulating material 153 cannot maintain a vacuum when the exterior material is damaged, and cannot obtain a desired heat insulating effect. The vacuum heat insulating material 153 of the present embodiment is covered with a foam heat insulating material 154 to be described later, and further, the outside is protected by the outer plate 152, so that the heat insulating material is prevented from being damaged due to external damage or the like as much as possible. It is possible to prevent the above-mentioned problem from occurring.

  The foam heat insulating material 154 is disposed so as to cover the periphery of the vacuum heat insulating material 153. As the foam heat insulating material 154, a known foam heat insulating material can be used. For example, polyurethane foam, polyester foam, melamine resin foam, phenol resin foam, polyethylene foam, polypropylene foam, polystyrene foam Body, natural rubber foam, synthetic rubber foam, elastomer foam and the like can be used.

The heat shield film 155 is disposed so as to cover the entire outer surface of the foam heat insulating material 154. Examples of the heat shielding film 155 include a multilayer film including a metal foil, a vapor deposition film in which a vapor deposition layer is formed on one surface of a resin film, and the like.
The above-described vacuum heat insulating material 153, the foam heat insulating material 154, and the heat shielding film 155 constitute a heat insulating material layer.
Further, the heat insulating material layers (153, 154, 155) are bonded to the frame 151 by an adhesive 156.

3 also includes an outer layer having a frame 161 and an outer plate 162 as well as the front plate portion 150, and also includes a vacuum heat insulating material 163 and a foam heat insulating material. The heat insulating material layer having the heat insulating film 165 and the heat insulating film 165 is provided, and the heat insulating material layer is bonded to the frame 161 by the adhesive material 166.
Further, although not shown, the front plate portion 150, the right plate portion 120, the left plate portion 130, the back plate portion 140, the upper plate portion 170, and the upper door portion 180 are also included in the front plate portion 150 and the front door. The configuration is the same as that of the unit 160.

FIG. 4 is an enlarged view showing a latch mechanism provided at a joint portion between the front door portion 160 and the right side plate portion 120. FIG. 4 shows a position immediately before the front door 160 is closed.
In the following description, the latch mechanism provided on the + Y side will be described, but a similar mechanism is also provided on the −Y side.
The cold insulation box 100 according to the present embodiment includes a movable bar 191, an operation member 192, and a spring (not shown) as components necessary for the latch mechanism.

  The movable bar 191 is disposed on the frame 161 and is attached so as to be movable along the Y direction. The movable bar 191 is biased toward the + Y side by a spring. The movable bar 191 has a locking shape (not shown) and is stopped at a predetermined position by engaging with a positioning shape (not shown) provided in the frame 161. The movable rod 191 has a distal end portion 191a protruding from the frame 161 by a predetermined amount as shown in FIG. 4 in a state where the locking shape is engaged with the positioning shape in the frame 161. The distal end portion 191a of the movable bar 191 is formed with a slope on the −X side in a state where the front door portion 160 is closed.

The frame 161 is provided with a fitting end portion 161b, and the frame 121 at a position corresponding to the fitting end portion 161b is provided with a fitting end portion 121b. The fitting end 121b of the right side plate 120 is formed in a shape that receives the fitting end 161b of the front door 160 when the fitting end 161b is closed.
When the front door 160 is closed, the tip 191a of the movable bar 191 receives a force in the -Y direction with its inclined surface abutting against the fitting end 121b, so that the movable bar 191 is semi-automatic while charging a spring. Thus, the tip 191a is immersed in the frame 161 by moving in the -Y direction. And when the front-end | tip part 191a reaches the fitting hole 121a opened to the fitting end part 121b, the front-end | tip part 191a of the movable rod 191 fitted in the fitting hole 121a, and the front door part 160 was closed Hold on.

  On the other hand, when opening the front door 160, the user operates the operating member 192 and moves it in the -Y direction, thereby moving the movable bar 191 in the -Y direction while charging the spring. The tip 191 a is immersed in the frame 161. Thereby, the front door part 160 can be opened forward.

With the configuration of the latch mechanism and the operation member 192 as described above, in the cold insulation box 100 of the present embodiment, the front door portion 160 can be reliably held in the closed state, and an appropriate amount for improving the heat insulation characteristics. Airtightness is maintained.
Here, when the front door 160 is closed when the boundary between the front plate portion (wall portion) 150 and the front door portion (door portion) 160 is a simple flat surface, it is kept warm. There is a possibility that a gap directly passing between the inside and the outside of the box 100 is generated. In that case, the sealing property (air tightness) is lowered, and heat is directly transferred between the inside and the outside without passing through the heat insulating layer, which may reduce the heat insulating properties.

Therefore, in the cold insulation box 100 of the present embodiment, the boundary line between the front plate portion 150 and the front door portion 160 in the closed state of the front door portion 160 is bent in the cross section orthogonal to the rotation center of the front door portion 160. (See FIG. 3).
Since the boundary line is bent in this way, air can be prevented from passing straight between the outside and the inside, and airtightness can be improved.
In particular, in this embodiment, the boundary line is bent by shifting the end face positions of the heat insulating material layers (153, 154, 155, 163, 164, 165) and the outer layers (151, 152, 161, 162). It is composed. Therefore, it can be set as the structure where the air from the outside always contacts the heat insulating material layer. Therefore, even if the front door part 160 that opens and closes is provided, it is possible to prevent a decrease in the heat insulation characteristics.

FIG. 5 is a view showing a state where the front door portion 160 is opened in a cross section similar to FIG.
FIG. 6 is a perspective view showing a state in which the front door portion 160 is opened based on the cross section of FIG.
In the state where the front door part 160 is opened, each end part of the front plate part 150 and the front door part 160 is configured in a stepped shape in which the height is gradually reduced toward the outside of the cold insulation box 100.

  Further, a warning tape 103 provided with a warning display for preventing finger pinching or the like is attached to each end of the front plate portion 150 and the front door portion 160. As the warning tape 103, for example, a so-called tiger tape provided with yellow and black stripes can be used. The surface on which the warning tape 103 is provided is a surface configured in a staircase shape whose height decreases gradually toward the outside of the cold insulation box 100. Therefore, the warning tape 103 can be visually recognized both when viewed from the front (+ X side) and when viewed from above (+ Z side). As a result, it is possible to avoid a dangerous situation where the warning tape 103 is not seen. This safety improvement effect is obtained by bending the above-described boundary line, and is a special effect that cannot be obtained with a flat boundary line configuration.

  The warning tape 103 described above is a safety measure when the front door 160 is closed. Apart from this, the present embodiment also includes a safety measure when the front door 160 is opened. The cushioning material 104 is provided on each of the outer surfaces of the front plate portion 150 and the front door portion 160 and facing each other when the front door portion 160 is opened. By providing the cushioning material 104, even if a finger is temporarily sandwiched when the front door portion 160 is closed, damage can be reduced. In addition, it is desirable that the position where the cushioning material 104 is provided be a position close to the boundary line between the front plate portion 150 and the front door portion 160 in order to improve safety.

  As described above, according to the present embodiment, since the cold insulation box 100 is configured such that the boundary line between the front plate portion 150 and the front door portion 160 is bent, it has a simple structure, It is possible to maintain a good heat insulating property by suppressing a reduction in heat bridge and airtightness on the joint surface of the door portion. In addition, since the warning tape 103 is provided on the surface that is configured in a stepped shape, the height of which gradually decreases toward the outside of the cold insulation box 100, the warning tape 103 can be visually recognized from both the front and the upper side. The safety of the cold insulation box 100 can be further enhanced.

(Deformation)
The present invention is not limited to the embodiment described above, and various modifications and changes are possible, and these are also within the scope of the present invention.

For example, in the present embodiment, the warning tape 103 may be formed of an elastic member such as an elastomer material or a sponge material to further fill the gap.
Further, the warning tape 103 may be partially provided.
Further, the boundary line portion between the upper plate portion 170 and the upper door portion 180 may be configured in the same manner as the boundary portion between the front plate portion 150 and the front door portion 160.
The present invention is not limited to the embodiments described above.

100 Insulation box 101, 102 Hinge 103 Warning tape 104 Buffer material 110 Bottom plate portion 120 Right plate portion 121 Frame 121a Fitting hole 121b Fitting end portion 130 Left plate portion 140 Back plate portion 150 Front plate portion 151 Frame 151a Groove portion 152 Outside Plate 153 Vacuum heat insulating material 153a Core material 153b Exterior material 154 Foam heat insulating material 155 Heat insulating film 156 Adhesive material 160 Front door portion 161 Frame 161b Fitting end portion 162 Outer plate 163 Vacuum heat insulating material 164 Foam heat insulating material 165 Heat insulating film 166 Adhesive Material 170 Upper plate portion 180 Upper door portion 191 Movable bar 191a Tip portion 192 Operation member 500 Pallet 501 for conveyance Claw hole

Claims (4)

A cold and warm storage box configured in a box shape,
A wall portion including a heat insulating material layer and constituting a wall surface;
Including a heat insulating material layer, can be rotated and opened with respect to the wall portion around a linear rotation center, and when closed, a door portion disposed on the same plane as the wall portion;
With
In the cross section perpendicular to the rotation center, a cold insulation box in which a boundary line between the wall portion and the door portion in a closed state of the door portion is bent. In the cold insulation box according to claim 1,
In the cross section perpendicular to the center of rotation, the end of each of the wall and the door, which is a boundary line in the closed state of the door, faces the outside of the cold insulation box when the door is open. It is configured in a staircase shape that gradually decreases in height,
Insulated cold storage box. In the cold insulation box according to claim 2,
A warning display is provided on at least a part of the end portions of the wall portion and the door portion,
Insulated cold storage box. In the cold insulated box according to any one of claims 1 to 3,
The wall portion and the door portion, in addition to the heat insulating material layer, respectively, an outer layer constituting the surface of the cold insulation box,
With
The bend of the boundary line is configured by shifting the end face positions of the heat insulating material layer and the outer layer,
Insulated cold storage box.

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