JP2005329964A - Cold insulation box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cold insulation box capable of suppressing torsional deformation of a resin foam-made panel used for each side plate or the like without degrading the cold insulation effect, excellent in durability, and excellently used without impairing the assembly property and the heat insulation property for a long time. <P>SOLUTION: The cold insulation box comprises a container body 1 which is separably assembled by a bottom plate 11 and four side plates 12a-12d, a lid 2 and a cover 3 to house the outer side of the container. The bottom plate 11, the side plates 12a-12d and the lid 2 of the container body 1 are constituted of resin foam-made panels, and groove parts 15a-15d continuous in the vertical direction with intervals in the periphery of the container over the substantially entire area are formed in inner surfaces of the container of the side plates 12a-12d. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an assembling-type cold storage container used for storing and transporting articles requiring cold storage.

  As an assembly-type cold storage container, as shown in the following Patent Document 1, a cover body as an outer box having a rectangular parallelepiped shape, a container body made of a heat insulating material disposed inside the cover body, and the container body A cold storage container is known which is composed of a combination with a cover made of a heat insulating material covering the upper surface, and the bottom plate and the four side plates of the container body are assembled along the bottom surface and the four side surfaces of the cover body. ing.

  As a heat insulating material for such an assembly type cold insulation container, a heat insulating material made of foamed resin molded into a panel shape is used. As the foamed resin, those produced by conventionally known foam molding techniques such as extrusion molding and in-mold molding are used.

  Panels made of foamed resin molded into a panel shape are widely used for assembling type cold storage containers and the like due to the characteristics of moldability, heat insulation and low cost.

  By the way, when the above-mentioned foamed resin panel is used in an assembling-type cold storage container, if the use is repeated over time, the panel itself may be deformed including a twisting phenomenon due to temperature differences inside and outside the container, washing, drying, etc. As a result, even when the cover body is covered, the external shape may be deformed or the assembly by removing the panel may not be possible.

  For example, as an assembly form of the container body, after the four side plates are set in the cover body so as to sandwich the other opposing side plate between the one opposing side plates, the space surrounded by the four side plates Insert the bottom plate inside and set it on the bottom. At this time, for example, if the panel made of foamed resin used for each side plate is twisted and deformed, it cannot be assembled and set well, or the outer shape of the container is distorted in the assembled state, which makes the appearance unnatural.

  In addition, an assembly container using a panel made of foamed resin has been proposed in which only the bottom plate can be separated from the four side plates, and the four side plates can be folded and connected so as to be folded low. However, in this case, the hinge structure for connecting the side plates so that the side plates can be bent is expensive, and it is difficult to perform assembly and setting work inside the cover body. It is not suitable for a cold container used in combination.

In the case of a container made of foamed resin integrally molded in a substantially rectangular plane, it is fundamentally different from an assembly container using a panel, and does not cause torsional deformation or distortion.
JP 2003-182777 A Japanese Patent Laid-Open No. 7-277327

  The present invention has been made in view of the above, and in an assembled cold storage container formed by combining a container main body and a lid made of a heat insulating material with a cover body, and assembling and separating the container main body within the cover body. Can suppress torsional deformation of foamed resin panels used on the four side panels, etc., without reducing the cold insulation effect, has excellent durability, and can be used well without compromising assembly and thermal insulation over a long period of time A cold container is provided.

  SUMMARY OF THE INVENTION The present invention solves the above-described problem, and a container main body that is assembled in a separable manner by a bottom plate and four side plates, a lid that covers the upper surface of the container main body, and a container of the container main body and the lid A cover body covering the outside, wherein the bottom plate of the container body, the four side plates, and the lid body are each constituted by a panel made of foamed resin, and the inside of the container of each side plate The side surface is formed with a groove portion that is continuous in the vertical direction with an interval in the circumferential direction of the container over substantially the entire region.

  According to this cold storage container, each side plate on the four sides of the container body made of the foamed resin panel has a vertical groove formed on the inner surface of the container. The shape serves to reinforce the deformation of the foamed resin panel that constitutes the side plate, and in particular can prevent torsional deformation, so that it does not hinder the assembly of the container body even over time, and the outer shape of the container in the assembled state Can prevent distortion.

  In addition, the vertical groove on the inner side surface of each side plate can secure the flowability in the vertical direction between the stored article and the side plate in a state in which the article is stored inside the container, and maintains a good cold insulation effect. it can.

  In the cold storage container, a plurality of vertical protrusions are provided on the container inner surface of each side plate, and a portion between the protrusions is formed as a vertical groove having a concave shape. be able to. In this case, the convex portion serves as a reinforcing rib, each side plate is more difficult to be twisted and deformed, and the flowability of cold air can be well maintained by the groove portion.

  Grooves that are continuous in a lattice shape may be formed on the inner surface of the container of the bottom plate. In this case, the concavo-convex shape by the groove acts to restrict the twist of the foamed resin panel constituting the bottom plate, can prevent deformation due to aging, and the condensed water flows into the groove of the bottom plate, so that it is stored. The article does not come into direct contact with moisture accumulated at the bottom. In addition, the groove portion also serves as a cold air flow path in the storage state of the article, so that the cold insulation effect can be more satisfactorily maintained.

  Moreover, it is preferable that the bottom plate and each side plate are formed by covering a synthetic resin sheet on the inner surface of the container in which at least the groove is formed. As a result, the inner surface of the container, which has an uneven shape, can be reinforced by the groove, and it is possible to prevent chipping or breakage of each plate made of foamed resin. Hard to stick and easy to clean. In particular, when the entire surface of the foamed resin panel used for the bottom plate and the side plates is covered with the synthetic resin sheet, the effect can be further enhanced.

  The width (groove width) of the groove portion in each of the side plates and the bottom plate is preferably in the range of 5 to 15 mm. That is, if the groove width becomes too large, the stored article will be caught in the groove portion and the flow of cold air will be hindered, resulting in a decrease in the cold insulation effect. If the groove width is too small, a sufficient cold circulation effect cannot be obtained. Therefore, the groove width is preferably set in the above range, and more preferably in the range of 5 to 10 mm from the viewpoint of the cold insulation effect.

  The cold storage container can be implemented particularly well when the container body and the cover body are detachably combined.

  The present invention provides a container body and a cover body configured to be separable using a panel made of foamed resin and a cover body covering them, and without reducing the cold insulation effect, Each side plate of the four sides and the bottom plate can be prevented from being twisted and deformed, have excellent durability, and can be used satisfactorily for a long time.

  Next, embodiments of the present invention will be described based on examples shown in the drawings.

  FIG. 1 is a perspective view with a part cut away showing one embodiment of a cold storage container according to the present invention, FIG. 2 is a plan view with the lid of the cold storage container opened, and FIG. 3 shows a bottom plate and four side plates of the container main body. FIG. 4 is a sectional view showing the assembled state of the cold insulation container, and FIG. 5 is an enlarged sectional view of the same part. FIG.6 and FIG.7 is a top view which shows the other example of the combination form of each side plate in a container main body.

  The cold insulation container A of the present invention covers a container body 1 assembled in a rectangular parallelepiped shape opened upward, a lid body 2 covering the upper surface of the container body 1, and at least the outside of the container body 1 and the lid body 2. It consists of a cover body 3 for exterior.

  The cover body 3 is constituted by a main body 30 and a lid 33 that open upward mainly using a flexible waterproof sheet material. Although the cover body 3 can be configured only by the flexible waterproof sheet material, in the case of the figure, a plate-like material having rigidity such as plastic corrugated cardboard is used as a center, and the surface is formed by the waterproof sheet material. Consists of things covered.

  A plastic edge member 35 is attached to the opening edge of the main body 30, and a plastic corner member 36 is attached to the corner to be reinforced. A carrying handle 37 is provided on one opposite side surface portion of the main body 30.

  The lid 33 is connected to the opening edge of the main body 30 so as to be freely opened and closed. Reference numerals 34a and 34b denote closing tools such as hook-and-loop fasteners for holding the lid portion 33 in the attached state. The lid portion 33 may be configured separately from the main body portion 30, or the lid portion 33 may be omitted and used only by the main body portion.

  As a waterproof sheet material which comprises the said cover body 3, they are materials, such as an aluminum vapor deposition film and a sheet | seat, a polyethylene cloth, a tarpaulin (PVC, EVA), a polyester toughener, a nylon toughener, etc., for example. Of course, the cover body 3 may be configured by a cloth other than the waterproof sheet material, a synthetic resin, paper, or the like. From the viewpoint of foldability, a flexible sheet material is suitable. The sheet material is not necessarily waterproof, but is preferably a waterproof sheet material from the viewpoint of ease of cleaning and wiping.

  Further, the bottom plate 11 and the four side plates 12a, 12b, 12c, 12d constituting the container body 1 and the lid body 2 are each formed mainly from a panel made of foamed resin having heat insulation properties, As will be described later, the foamed resin body is formed by covering at least the surface of the inner surface of the container with a synthetic resin sheet.

  And the said container main body 1 is comprised so that the bottom plate 11 and each side plate 12a-12d of 4 directions may be assembled | attached in the said cover body 3 so that isolation | separation is possible.

  As an assembly form of the container body 1, as shown in FIGS. 1 to 5, the four side plates 12 a to 12 d are usually connected to the four side surfaces 32 a, 32 b, 32 c, and 32 d of the cover body 3. And the opposite side plates 12b and 12d on the other side (short side in the figure) are sandwiched between the opposite ends of the opposite side plates 12a and 12c on one side (the longer side in the figure). Each of the side plates 12a to 12d is set up on the bottom surface 31 of the cover body 3 in a space surrounded by the side plates 12a to 12d. The lower end portions 14a to 14d are fixed between the bottom plate 11 and the cover body 3 so that the container body 1 is held in an assembled state. Therefore, the cover body 3 for the exterior has a rectangular parallelepiped shape in which the main body portion 30 opened on the upper surface corresponds to the container main body 1.

  As a form of combination of the four side plates 12a to 12d, in addition to the above, as shown in FIG. 6, one side end surface of each side plate 12a, 12b, 12c, 12d is adjacent to the side plates 12b, 12c, 12d, As shown in FIG. 7, either one of the opposite side plates 12b and 12d on the short side is opposed to the other end of the inner side surface of the container 12a. The opposite side plates 12a and 12c are formed so as to be abutted with the side end surfaces of the side plates 12a and 12c, and the opposite sides of the opposite sides 12b 'and 12d' of the side plates 12b and 12d are opposed to each other. Combination by various joining forms, such as combining the plates 12a and 12c so as to be inserted, is possible.

  In any case, a synthetic resin holding piece (not shown) mainly having a reverse L-shaped cross section in the vicinity of the upper ends of the four side surfaces 32a, 32b, 32c, 32d of the cover body 3 is omitted. The upper end portions of the side plates 12a to 12d of the container body 1 assembled as described above can be held to prevent falling.

  Further, the lid 2 can be formed so as to be separated from the cover 3 and can be handled separately. In the illustrated embodiment, the lid 2 is a lid of the cover 3. It is attached to the inside of the portion 33 and is provided so that it can be opened and closed together with the lid portion 33.

  And in the container inner surface of each of the four side plates 12a to 12d in the container main body 1, the vertical direction with a predetermined interval in the container circumferential direction as viewed from the plane over substantially the whole area excluding the joined portion in the assembled state. Consecutive groove portions 15a, 15b, 15c and 15d are formed.

  In the case of the figure, a plurality of upper and lower rib-shaped convex portions 16a, 16b, 16c, and 16d are projected from the inner side surfaces of the side plates 12a to 12d at predetermined intervals in the circumferential direction of the container. Thus, the portion between the convex portions is formed as the vertical groove portions 15a, 15b, 15c, 15d having a concave shape. Although illustration is omitted, it is also possible to carry out by recessing the same groove as described above without projecting a convex on the inner surface of the container.

  The groove portions of the side plates 12a to 12d, particularly the groove portions 15a to 15d formed by the convex portions 16a to 16d as described above, may be continuous from the upper end to the lower end of the side plates 12a to 12d. In this case, in the state where the container body 1 is assembled and set, the groove portions 15a to 15d reach the bottom surface portion 31 of the cover body 3 between the bottom plate 11 and the heat insulating effect is impaired at the portion. This may reduce the cooling effect. Therefore, as shown in the drawing, at least at the lower end portions 14a to 14d, the flat plate is located up to the upper surface position of the bottom plate 11 set in contact with the inner side, and does not have the convex portions 16a to 16d and the groove portions 15a to 15d. It is preferable to form it in a shape. In the case of the embodiment shown in FIGS. 1 to 5, the upper end portions of the side plates 12a to 12d are flat plates not having the groove portions 15a to 15d formed by the convex portions 16a to 16d, similarly to the lower end portions 14a to 14d. The upper and lower ends are symmetrical and can be used regardless of which end side is the lower end side.

  Moreover, when the said groove parts 15a-15d are formed of the said convex parts 16a-16d, as the said convex parts 16a-16d, you may make the form which interrupted at the part of the up-down direction, for example, an intermediate position. . That is, as shown in FIG. 8, the convex portion 16a may be intermittently formed by notching the required width at the intermediate portion in the vertical direction. Even in this case, since the groove 15a formed by the convex portion 16a continues in the vertical direction through the notch 16a ′, the cold air flowability in the vertical direction by the groove 15a is sufficient. In addition, it is possible to secure the cold air flowability in the lateral direction.

  Further, the bottom plate 11 has grooves 11a formed in at least one direction in the vertical and horizontal directions, preferably in a lattice shape as shown in the figure, on the inner side surface, that is, the upper surface of the container. In particular, the groove 11a is preferably provided at a position corresponding to the grooves 15a to 15d of the side plates 12a to 12d in the assembled state of the container body 1. Reference numeral 11b denotes a square convex portion defined by the groove 11a.

  The width (groove width) α of the groove portions 15a to 15d of each of the side plates 12a to 12d, the depth β of the groove portions, the interval between adjacent groove portions (width of the convex portion between the groove portions) θ, and the like are effective in preventing twisting. In addition, although it can set in consideration of heat insulation, a cold insulation effect, intensity | strength, etc., about the groove width (alpha) of each said groove part 15a-15d, the range of 5-15 mm is preferable.

  That is, if the groove width α is too large, the stored article enters the groove portion and obstructs the flow of cold air, so that the heat insulation and cold insulation effects are reduced. Further, if the groove width α is smaller than the above range, a sufficient cool air circulation effect cannot be obtained. Therefore, the groove width α is preferably set in the above range, and particularly when the groove width α is set in the range of 7 to 10 mm, the above effect is high and particularly preferable. The same applies to the groove width of the groove 11a of the bottom plate 11. This point is also clear from the test results of the cold insulation effect described later.

  In addition, the depth β of the groove portions 15a to 15d is normally set to 5 to 10 mm, preferably around 7 mm, from the viewpoint of cold air flowability and the like, and the interval θ between the groove portions is prevented from being twisted. From the viewpoint of the effect and the cold insulation effect, it is usually set to 10 to 30 mm, preferably 15 to 20 mm. Of course, implementation outside the above range is also possible.

  Note that the groove width α and depth β of the groove portions 15a to 15d and the interval θ between the groove portions are not necessarily all the same, and the groove width depth may be partially or alternately. The length and spacing can be varied.

  The bottom plate 11 and the side plates 12a to 12d constituting the container body 1 have a synthetic resin sheet 17 as a protective layer on at least the inner surface of the container in which the groove portions 11a and 15a, 15b, 15c, 15b are formed. And 18a, 18b, 18c, and 18d are covered by a stacking means or the like. In particular, the inner surface of the container is covered along the concave and convex shape by the groove and the like. Preferably, as shown in FIG. 4, the synthesis is performed over the entire surface including the outer side surface from the inner side surface to the upper and lower end surfaces and both side end surfaces of the foamed resin panel constituting the bottom plate 11 and the side plates 12a to 12d. The resin sheets 17 and 18a to 18d are covered. As a result, the surface of the panel made of foamed resin can be protected, damage during use can be prevented, and it becomes difficult to get dirty.

  The synthetic resin sheets 17 and 18a to 18d are placed in a molding die at the time of molding the foamed resin panel constituting the bottom plate 11 and the side plates 12a to 12d and laminated simultaneously with the molding, After forming and laminating and covering, the embossing can be performed along the uneven shape of the surface on which the groove portions 11a and 15a to 15b are formed, or the embossing can be performed along the uneven shape. It can also be coated. As a laminating means, it is preferable to integrate with a panel made of foamed resin using heat fusion at the time of molding, extrusion lamination, lamination using an adhesive, or the like.

  As for the lid 2, at least the inner surface of the container is preferably covered with the same synthetic resin sheet 23 over the entire surface.

  The material of the foamed resin panel used for the container body 1 and the lid 2 is styrene-modified polyethylene resin, polystyrene, high impact polystyrene, styrene-maleic anhydride copolymer, styrene-acrylonitrile copolymer. Polystyrene resins such as styrene-acrylonitrile-butadiene copolymer, polyolefin resins such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer, polyester resins such as polyethylene terephthalate, polyurethane, etc. can be used. .

  Examples of the physical foaming agent mixed in the resin include aliphatic hydrocarbons such as propane, butane, pentane and hexane, aliphatic cyclized hydrogens such as cyclopentane and cyclobutane, and acetone methyl ethyl ketone. Ketones, alcohols such as methanol and ethanol isopropyl alcohol, water, carbon dioxide and the like can be used.

  The foamed resin panel may be foam-molded into a predetermined thickness and shape including the groove portions, particularly the groove portions 15a to 15d formed by the convex portions 16a to 16d by an in-mold molding method, or the resin material is extruded and foam-molded. The thing cut | judged to the predetermined dimension or the thing sliced and cut | disconnected to predetermined thickness can also be used. In the case of extrusion foam molding, the vertical direction in use as a side plate can be the extrusion direction, and the groove portions 15a to 15d by the convex portions 16a to 16d can be integrally formed continuously in the longitudinal direction by extrusion molding. . At this time, the convex portion at the lower end in the state of use as the side plate may be cut off and used.

  The synthetic resin sheaths 17, 18a to 18d and 23 covering at least the inner surface of the foamed resin panel are polystyrene, high impact polystyrene, styrene-maleic anhydride copolymer, styrene-acrylonitrile copolymer. Polystyrene resins such as polymers, styrene-acrylonitrile-butadiene copolymers, polyolefin resins such as polyethylene, polypropylene, ethylene-vinyl acetate copolymers, polyester resins such as polyethylene terephthalate, or polyamide resins such as nylon For example, a film or a sheet formed of the above or a composite material thereof can be used, and the same material as the container body can be used.

  Further, as the synthetic resin sheet, a vapor-deposited film or sheet in which a metal such as aluminum is vapor-deposited, or a composite material in which aluminum or the like is thinly molded and laminated on the resin film or sheet can be used. When a vapor-deposited film or a thin aluminum film is used, the sustainability of the cooling effect is improved, and the appearance is good and more preferable.

  In the use of the cold insulation container A of the above embodiment, first, the bottom plate 11 of the container body 1 is installed on the bottom surface portion 31 of the cover body 3. Then, the four side plates 12a to 12d of the container body 1 are inserted between the cover body 3 and the bottom plate 11 with the respective lower end portions 14a to 14d, and the four side surfaces of the cover body 3 are inserted. Stand up along 32a-32d. For each of the side plates 12a to 12d, for example, lower end portions 14a and 14c of the side plates 12a and 12c on the long side are inserted between the cover body 3 and the bottom plate 11, and the side plates 12a and 12c are inserted into the cover. Standing along the side surface portions 32a and 32c of the body 3, and then inserting lower end portions 14b and 14d of the side plates 12b and 12d on the short side between the cover body 3 and the bottom plate 11, The cover body 3 is erected so as to be along the side surfaces 32b and 32d. In this way, the lower end portions 14a to 14d of the side plates 12a to 12d are fixed between the bottom plate 11 and the cover body 3, and the container body 1 is held in an assembled state.

  Depending on the concavo-convex shape of the inner side surfaces of the side plates 12a to 12d, the bottom plate 11 can be installed on the bottom surface of the internal space after the side plates 12a to 12d are set in the cover body 3.

  In this way, an article to be stored is placed inside the container body 1, the lid body 2 is placed so as to close the upper opening of the container body 1, the lid portion 33 that holds the lid body 2 is covered, and transported or store.

  In this use, since each of the four side plates 12a to 12d of the container main body 1 made of a foamed resin panel is formed with vertical grooves 15a to 15d on the inner surface of the container, the grooves 15a to 15d are formed. And the concave and convex shapes by the convex portions 16a to 16d between the groove portions serve to reinforce the deformation of the foamed resin panels constituting the side plates 12a to 12d, thereby preventing torsional deformation in particular, and even when used over time. Assembling of the container main body 1 does not cause any trouble, and it is possible to prevent the outer shape of the container in the assembled state from being distorted and to be used with a good appearance.

  In addition, the vertical groove between the side articles 12a to 12d can be secured in the state in which the articles are stored in the container by the vertical grooves on the inner side surfaces of the side plates 12a to 12d. Good cooling effect can be maintained.

FIG. 9 shows that the groove portions 15a to 15d are formed on the container inner side surfaces of the four side plates 12a to 12d, and the cold insulation between the case where the groove widths are different and the case where the groove portions are not provided is shown. The result of the comparative experiment of the effect is shown. This comparative experiment was performed under the following conditions.
[Device used]
Temperature measuring instrument: “DATA COLLECTOR AM-7002” manufactured by Anritsu Keiki Co., Ltd.
(Usage range temperature: -200 to 800 ° C)
Environmental tester: “TEMPERATURE AND HUMIDITY” manufactured by Tabai Espec
(Usage range Temperature: -40-100 ° C Humidity: 20-98% RH)
[Container]
As the constituent material of the foamed resin panel, foamable polystyrene resin particles prefoamed 40 times were used and molded into a predetermined shape by an in-mold molding method. As shown below, the sample panel has no groove (groove width 0 mm), and has a groove formed on the inner surface of the panel used for each side plate and bottom plate as shown in FIG. 3 (groove width 7 mm, 2 types of 15 mm).

Container body size (inner dimensions): 630 mm x 370 mm x 495 mm (length x width x depth)
Panel groove thickness: 25mm
Panel groove width: 0mm, 7mm, 15mm
Panel groove depth: 7mm
Spacing between grooves: 15mm
The cover body was formed by sewing a composite cloth laminated with an aluminum vapor deposition film to cover the outer surface, and the lid body was attached to the lid portion connected to the main body portion of the cover body.

[Measuring method]
A cold storage container is assembled and constructed with the above cover body and panel, and three types of food frozen at −25 ° C. are stored in three stages (each of which is croquette, fish, meat) .

  The height of one step of each stored food was 110 mm, and the total height was 330 mm. That is, the upper space in the cold storage container was 165 mm, and 1 kg of powdery dry ice was put into this upper space.

  The room temperature of the environmental testing machine was set to 30 ° C., and the humidity was set to 60%. A temperature sensor was installed in the croquette at the bottom of the container and in the room of the environmental tester, and the temperature was measured for 10 hours at 30 minute intervals with a temperature measuring device. The results are shown graphically in FIG.

[result]
According to the results of the above-mentioned experiment, as compared with a groove having a groove width of 0 mm (no groove), a groove provided has a good cooling effect because the temperature rise in the container is suppressed, and in particular, the groove width is 7 mm. The one with a groove width of 15 mm had a much better cold insulation effect. That is, the groove width of the groove portion is set to about 7 mm, which is particularly preferable in terms of the cooling effect.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used for cold storage containers for storing and transporting fresh products such as fruit vegetables, meats and seafood, and other items that require cold storage, and also suitable for take-out containers for various products that require cold storage. it can.

It is the perspective view which notched a part which shows one Example of the cold storage container which concerns on this invention. It is the top view which opened the lid | cover of the cold storage container same as the above. It is a perspective view which isolate | separates and shows the bottom plate and 4 side plate of a container main body same as the above. It is sectional drawing of the assembly state of a cold storage container same as the above. It is a partial expanded sectional view same as the above. It is a top view which shows the other example of the combination form of each side plate in a container main body. It is a top view which shows the further another example of the combination form of each side plate in a container main body. It is a perspective view which shows the other Example of a side plate. It is a graph which shows the result of a cold insulation test.

Explanation of symbols

A Cold storage container 1 Container body 2 Cover body 3 Cover body 11 Bottom plate 11a Groove portion 11b Protruding portion 12a to 12d Four side plates 14a to 14d Lower end portion 15a to 15d Side plate groove portions 16a to 16d Rib-shaped convex portions 17, 18a to 18d , 23 Synthetic resin sheet 30 Body portion 31 Bottom portion 32a to 32d Four side surfaces 33 Lid portion 34a, 34b Closure 35 Edge member 36 Corner member 37 Handle α Groove width β Depth of groove portion θ Depth of groove portion

Claims (6)

A container body that is separably assembled by a bottom plate and four side plates, a lid that covers the top surface of the container body, and a cover that covers the container body and the outside of the container. Each of the bottom plate and the four side plates and the lid body is a cold storage container formed of a foamed resin panel,
A cold storage container characterized in that a groove portion that is continuous in the vertical direction is formed on the inner surface of the container of each side plate at intervals in the circumferential direction of the container over substantially the entire region.   The cold storage container according to claim 1, wherein a plurality of vertical protrusions are provided on the inner side surface of each side plate, and a portion between the protrusions is formed as a vertical groove having a concave shape.   The cold storage container according to claim 1 or 2, wherein grooves are formed in a lattice shape on the inner surface of the bottom plate.   The cold storage container according to any one of claims 1 to 3, wherein the bottom plate and each side plate are coated with a synthetic resin sheet on an inner surface of the container in which at least the groove is formed.   The cold storage container according to any one of claims 1 to 4, wherein a width of the groove portion in the vertical direction on the container inner surface of each side plate is in a range of 5 to 15 mm. The cold storage container according to any one of claims 1 to 5, wherein the container body and the cover body are combined in a separable manner.

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