JP2010076816A - Cold keeping container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cold keeping container capable of being stably stacked one on another without causing a tilt while storing fruits and vegetables therein, having a lid body put thereon, and being raised on one sidewall. <P>SOLUTION: The cold keeping container is constituted of a container body 10 made of foamed resin and a lid body 30. The container body 10 has both vertically opposite sidewalls 12a and 12b, when the container body is laterally raised with one sidewall 12a as the bottom, and parts of the outside surfaces of the sidewalls are formed with at least a pair of mutually parallel flat abutment surfaces 17a, 17b used for stacking the containers, each forming a surface perpendicular to the container bottom surface at its corresponding position, thereby enabling the vertical stacking of the containers by making the flat surfaces 17a, 17b abut on each other upon the containers being stacked. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cold storage container suitable mainly for housing and storing or transporting various fruit vegetables.

  Conventionally, when storing and transporting slightly longer fruits and vegetables such as asparagus, a heat-insulated foamed resin cold insulation container has been used. Usually, the fruits and vegetables are vertically aligned for reasons of shape maintenance and the like. It was contained in the state. For example, asparagus grows slightly even during transportation after being stored in a container, and therefore, asparagus is handled in such a manner as to maintain a state where the tip side is up.

  As described above, storing the fruits and vegetables in the container in a standing state causes problems such as troublesome storage work and rubbing between the fruits and vegetables. Therefore, after asparagus and other fruits and vegetables are once aligned horizontally and stored in a container and covered with a lid, the fruits and vegetables are laid sideways so that the side wall on the base side is the bottom. A cold storage container that has been used for storage and transportation has been proposed (Patent Document 1).

  By the way, when storing and transporting fruits and vegetables in a container, the container is handled with being stacked in multiple stages on a pallet etc. with the container standing sideways as described above. In general, the outer side wall of the side wall does not form a vertical surface with respect to the bottom surface of the container, but has an inclined surface due to a draft in molding, so that the outer side walls of the upper and lower containers are aligned with each other. When stacked in the direction, the stacked containers are tilted, the tilt becomes larger as the upper container, the stacked state becomes unstable, and the stacked containers fall down or collapse during logistics work such as transportation or transportation There is a risk of doing. Moreover, if the side walls of the upper and lower containers are simply stacked so as to be aligned, the upper and lower containers are easily misaligned, and as a result, the stacked state may become unstable.

  In addition, in the molding of the container made of foamed resin, it is possible to mold without giving a draft to the entire outer surface of the side wall, but in that case, it takes time to mold after molding, and the mass productivity is poor. Since the cost increases, generally, for example, a draft of 1/50 to 1/100 is generally provided. For this reason, the above-mentioned problem occurs.

Furthermore, when fruits and vegetables such as asparagus are stored in a cold container and shipped, they are not pre-cooled in early spring, but are shipped with vacuum pre-cooling with a lid attached in summer and the like. Therefore, when shipping in early spring without pre-cooling, a vent is required so that heat generated from fruits and vegetables such as asparagus does not stay inside the container, and when shipping with pre-cooling in summer etc., the cooled heat It is desirable to ensure a certain degree of sealing performance by closing the vent so as not to escape.
JP 2002-104542 A

  The present invention has been made to solve the above-mentioned problems, and its purpose is to store fruits and vegetables and attach a lid, and then stand sideways so that one side wall is the bottom. In the case of stacking and handling, a cold storage container that can be stably stacked without causing tilt by a partially provided flat surface, and can suppress collapse and collapse of cargo during transportation physical work is provided. . In addition, the present invention provides the above cold storage container in a form that does not hinder container molding, and by imparting a function of preventing deviation during stacking, it is possible to maintain a more stable stacking state during transport logistics work. A cold storage container that can further improve the effect of preventing the collapse of cargo is provided. Furthermore, depending on the mode of use, such as shipping in the early spring, when it is not pre-cooled, or when shipping in the summer or other pre-cooling, the ventilation notch groove can be easily opened and closed by attaching the lid, and sealing after pre-cooling The present invention provides a cold storage container that can maintain good properties.

  The present invention comprises a flat rectangular foam resin container body that opens upward, and a foam resin lid body that can be freely attached to the opening of the container body. A cold storage container that is stored and transported in a state that it is stood sideways so that one side wall is at the bottom after being worn, and the container body has outer side surfaces of both side walls that are vertically opposed to each other in the standing state. A flat surface for abutting at the time of stacking at least a pair of containers that are perpendicular to the bottom surface of the container and parallel to each other at a corresponding position is formed in a part of each of the flat surfaces. It is provided so that it can be stacked.

  According to the cold storage container having the above-described structure, after storing fruits and vegetables such as asparagus and attaching a lid, it is molded on the outer surface of the opposite side walls of the upper and lower containers when stacked in a plurality of stages in a standing state. By abutting and stacking the abutting flat surfaces partially provided so as not to cause the above problem, it is possible to stack with good stability with almost no tilting, and fall down during transportation logistics work And load collapse can be suppressed, and workability can be improved.

  In the cold container, the abutting flat surfaces of the opposite side walls may be provided at intervals on both sides along the corners on both sides of the side walls. Thereby, the cold storage containers can be stacked with good stability so that the flat surfaces on both sides of the outer side surface of the side wall face each other.

  Further, in the above cold storage container, the abutting flat surfaces of the opposing side walls are such that the abutting flat surface of one side wall is recessed with respect to the outer surface of the corner portion, and the abutting flat surface of the other side wall is What is formed so that it may become convex is preferable. In this case, when stacked in a plurality of stages as described above, the contact portion between the flat surfaces of the upper and lower containers is inside the corner portion of one container, and the positional deviation in the left-right direction is restricted. And the stacked state becomes more stable.

  In the above-mentioned cold storage container, it is preferable that the corner part outer surface of the opposite side walls forms a vertical surface with respect to the container bottom surface. In this case, if the outer side surfaces of the corner portions are in contact with each other when the containers are stacked, the stacked state of each of the cold storage containers is further stabilized, and the flat surface for contact on the side wall at the bottom of the lowermost cold storage container is provided. Even if it is concave with respect to the outer surface of the corner part, the bottom cold storage container can be erected vertically to the floor or pallet surface, and the stacking state is stable. Can be obtained.

  In the cold storage container, a convex portion and a concave portion that are fitted to each other when the containers are stacked are formed on the outer side surfaces of the opposing side walls near the parting line on the molding, apart from the flat surface for contact. Can be.

  In this case, in addition to being able to stack without causing an inclination due to contact between the flat surfaces for contact during stacking, the upper and lower containers can be positioned by fitting the concave and convex portions, and each cold storage container can be positioned. They can be stacked and stacked, and can also be prevented from shifting in the stacked state, and can maintain a stable stacked state that does not shift or fall off due to vibration during transportation. And since the said recessed part and a convex part are set near the parting line on shaping | molding, it can shape | mold easily, without using the undercut shape on shaping | molding.

  In the cold insulation container, it is preferable that an opening end portion at the upper end of the side wall of the container main body and a peripheral edge portion of the lid body corresponding thereto are provided with fitting portions that are fitted to each other. Thereby, the adhesion state of a cover body can be hold | maintained favorably, the maintenance of the cold insulation state inside the container after pre-cooling, and the protection of the contents can be made favorable.

  In the cold storage container, a notch is formed at the center of each side of the opening end of the container body, and the notch is formed at the center of the lower surface of each side of the corresponding peripheral edge of the lid. A drooping piece that fits into the portion is provided, and an end edge portion of the cutout portion and an end edge portion of the drooping piece are provided so as to be fitted by a notched convex edge and a stepped portion. In this case, when pre-cooling the container main body containing fruit vegetables in the pre-cooling chamber, it is possible to take in cold air from the notch without shifting the container main body. In addition, it is possible to maintain good sealing performance by attaching the lid to the container body.

  The edge part of the notch part of the both-sides wall facing in the direction which cross | intersects the both side walls which have the said flat surface for contact | abutting of the said container main body, and the edge part of the drooping piece of the both sides of the said cover body corresponding to this In the attached state where the lids coincide with each other in the normal attached state of the lid body at the position of the staggered convex edge at a position shifted to the same side from the center in the width direction, and the direction is changed by 180 ° Ventilation notch grooves can be formed so as to be offset from each other.

  In this case, for example, when shipping in early spring without pre-cooling, the cover body is put in a normal attachment state, and a notch groove for ventilation provided on the convex edge of the edge portion of the notch portion of the container body, By matching and opening the ventilation notch groove on the convex edge of the edge part of the hanging piece, air permeability can be secured through the notch groove, so heat generated from fruits and vegetables such as asparagus is generated inside the container. There is no hesitation. In addition, when shipping with pre-cooling in summer, etc., the lid body is turned 180 ° and attached, and the container main body and the ventilation notch groove of the lid body are placed at positions shifted from each other. Moreover, it can be closed by the convex edge of the other phased shape, can ensure a good sealing property, and does not escape the cool air inside the container.

  As described above, the cold storage container of the present invention, after storing fruits and vegetables such as asparagus and attaching a lid, when stacked and handled in a state of standing sideways so that one side wall is the bottom, A flat surface partially provided so as not to cause a problem in molding can be stably stacked without causing an inclination, and can prevent collapse and collapse of goods during transportation physical work. In addition, by fitting the concave and convex parts provided near the parting line when molding the container body, positioning can be performed in a form that does not hinder container molding, and misalignment can be prevented. The state can be maintained, and the effect of preventing the collapse of cargo during transportation logistics work can be further improved.

  Furthermore, the cold insulation container of the present invention is provided with an operation for attaching the cut-out groove for ventilation to the lid according to the use mode, such as when shipping without pre-cooling in early spring, and when shipping with pre-cooling such as summer. Can be opened and closed easily, and the sealing performance after pre-cooling can be maintained well.

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

  FIG. 1 is a perspective view of a container body and a lid of a cold storage container according to an embodiment of the present invention, FIG. 2 is a perspective view of the same container body from the other direction, and FIG. 3 is a longitudinal front view of the container body and the lid. 4 is a half vertical sectional side view of the same, FIG. 5 is a front view of the lid attached, FIG. 6 is an enlarged cross-sectional view of the fitting portion of the corner portion when the lid is attached, and FIG. FIG. 8 is an enlarged cross-sectional view of the ventilation notch groove portion in the wearing state, and FIG. 8 is a partial cross-sectional view of the cover body attached state in which the ventilation notch groove is shifted. 9 is a perspective view of a state in which fruits and vegetables are stored and stood sideways, FIG. 10 is a cross-sectional view of the same, FIG. 11 is a cross-sectional view of the stacked state, and FIG. 12 is a partially enlarged cross-sectional view of the stacked state. .

  The cold insulation container A of this embodiment is a molded container made of foamed resin, and as shown in the figure, basically a container body 10 having a substantially rectangular plane that opens upward, and an opening end 11 of the container body 10. The lid 30 is fitted and attached to the housing. The cold storage container A has the opening of the container body 10 facing upward, and after the fruit vegetables B, for example, asparagus, are arranged and stored inside, the lid 30 is attached to the base side of the fruit vegetables B. In this state, the container body 10 can be stored and transported in a state where the one side wall 12a of the container main body 10 is set up sideways so as to be the bottom.

  Reference numeral 12b in the figure indicates a side wall that is vertically opposed to the one side wall 12a in the state of standing as described above, and reference numerals 13a and 13b indicate both side walls that are opposed to the both side walls 12a and 12b in the other direction. Show. Reference numeral 14 denotes four corner portions where the side walls of the container body 10 are continuous.

  In the case of the illustrated embodiment, a convex portion 16 is provided inside the container body 10 and serves as a support for the fruit and vegetable B stored in the bottom portion 15 while being laid sideways. Although not shown in the figure, the support for the fruit vegetables can be carried out in any shape according to the type of the fruit vegetables to be stored. For example, if the fruit and vegetables are asparagus, the side that receives the lower part of the stem part of the asparagus is supported with a lower slope so that the asparagus can be held in a standing posture in a standing state. Can do.

  The container main body 10 has a position corresponding to each other, that is, both side walls 12a and 12b, in a partial region of the outer side surfaces of the side walls 12a and 12b that are vertically opposed to each other in the state where the container body 10 is laid sideways as described above. At the time of stacking at least a pair of containers that are perpendicular to the bottom surface of the container (the bottom surface of the container body 10) and parallel to each other at a position symmetrical with respect to the center line passing through the center between them. The abutment flat surfaces 17a and 17b are formed to be thickened so as to be convex with respect to the original side wall outer surface portion 19 having a draft, and the flat surfaces 17a and 17b of the upper and lower containers are stacked when the containers are stacked. They contact each other so that the bottom surfaces of the containers can be stacked vertically in a straight line.

  In the case of the figure, the abutting flat surfaces 17a and 17b are provided on both sides along the corners 14 on both sides of the opposite side walls 12a and 12b, and have a draft angle for molding. It is formed in such a way that the number of missing parts is reduced and problems such as die cutting on molding do not occur. In particular, the abutment flat surfaces 17a and 17b of the side walls 12a and 12b are formed on either one side, for example, the abutment flat surface 17a of the side wall 12a which is the lower side in the state of being laid sideways as shown in the figure. Concave with respect to the outer surface 14a of the corner portion 14 and a flat surface 17b for contact with the other side wall 12b are formed so as to be convex with respect to the outer surface 14a of the corner portion 14. It is formed so as to perform the positioning function by restricting the deviation (see FIG. 12).

  On the outer side surfaces of the opposite side walls 12 a and 12 b of the container body 10, the outer surface 14 a of each corner portion 14 also has a draft angle on the molding in a plane perpendicular to the bottom surface of the container, that is, the bottom surface of the container body 10. When the containers are stacked, when the abutting flat surfaces 17a and 17b of the upper and lower containers are in contact with each other, the corner outer surfaces 14a and 14a are also in contact with each other at the same time. A stable stacked state can be obtained. For this reason, the heights of the abutting flat surfaces 17a and 17b and the corner portion outer surface 14a with respect to the side wall outer surface portion 19 are set so as to abut simultaneously as described above. Further, as described above, the outer surface 14a of the corner portion 14 forms a flat surface, so that the abutting flat surface 17a of the side wall 12a which is the lower side in the state of being laid sideways is recessed with respect to the corner portion outer surface 14a. Even if it makes what, it can stand the container body 10 of the lowest layer perpendicularly | vertically with respect to the floor surface etc., and can be piled up stably.

  Further, on the outer side surfaces of the opposing side walls 12a and 12b, positioning convex portions 18a and concave portions 18b that are fitted to each other at the time of stacking the containers are formed in an undercut shape at the time of molding. It is formed not to become. That is, in the molding of the container body 10, since a parting line on molding is usually set on the opening end 11 side, the convexity is formed at a location near the opening end 11 where the parting line exists. The part 18a and the recessed part 18b are provided so as not to have an undercut shape on molding.

  The container body 10 and the lid body 30 are provided with fitting portions that are fitted to each other at the opening end portion 11 at the upper end of the side wall of the container body 10 and the peripheral edge portion 31 of the lid body 30 corresponding thereto. . As this fitting part, for example, an opening-like fitting part of a container body and a peripheral part of the lid corresponding to this are provided with a fitting part having a phase-out shape with a convex edge and a notch step part continuous over the entire circumference. For example, it can be implemented by various fitting structures so that the attached state does not come off even in a state where it is stood sideways.

  In the case of the illustrated embodiment, a flat L-shaped fitting convex portion 22 is formed on the upper surface of each corner portion 14 of the container body 10, and the fitting is formed on the lower surface of each corner portion 34 of the lid 30. A fitting recess 32 that fits into the mating projection 22 is provided. Protrusions 22a and 32a that are engaged with each other in the fitted state are provided on the side surface of the fitting convex portion 22 and the inner side surface of the fitting concave portion 32, and resists the elastic force of the foam during the fitting operation. Thus, it can be elastically fitted, and in the fitted state, it is prevented from being pulled out even in a state of standing sideways.

  In addition, a notch 25 is formed at the center of each side of the opening end 11 of the container body 10, and the lower surface center of each side of the peripheral edge 31 of the lid 30 corresponding to the notch 25 is formed. A drooping piece 35 that fits into the notch 25 is provided, and an end edge portion of the notch 25 and an end edge portion of the drooping piece 35 are stepped from the notched convex edges 26 and 36. The parts 27 and 37 are provided so as to be fitted. As a result, when the container main bodies 10 containing fruit vegetables are stacked and pre-cooled, cold air can be taken from the notches 25 without shifting the container main bodies 10 and the lid 30 is attached. In this state, both the convex edges 26 and 36 and the stepped portions 37 and 27 can be fitted and sealed together. In the case of the figure, convex portions 26a, 36a that engage with each other in the removal direction are provided on the joint surface side in the fitted state of the convex edges 26, 36. It can be held.

  Edge portions of the notches 25 of the side walls 13a and 13b in the direction intersecting the side walls 12a and 12b having the contact flat surfaces 17a and 17b of the container body 10 and the lid 30 corresponding thereto. The lid body 30 is located at the positions of the staggered convex edges 26 and 36 at positions that are shifted from the center in the width direction to the same side and are symmetrical with respect to the plane. The ventilation notches 28 and 38 are formed so as to coincide with each other in the normal deposition state and to be shifted from each other in the deposition state changed by 180 °. That is, in the mode of use, the notch groove 28 of the container body 10 and the notch groove 38 of the lid 30 are matched and opened so that air can be vented, and the positions of both the notch grooves 28 and 38 are set. It is possible to select and use a state in which they are shifted and closed with the other convex edges 36 and 26.

  The vent grooves 28 and 38 are preferably formed with a step of several millimeters so that the bases of the convex edges 26 and 36 are left with respect to the step portions 27 and 37 of the edge portions, respectively. That is, by forming a step as described above, the lid 30 is slightly lifted when the lid 30 is attached to the container body 10 with the positions of the cutout grooves 28 and 38 being shifted. Even if it occurs, the portions of the cutout grooves 28 and 38 can be held in a closed state, and a good sealing property can be secured.

  Reference numeral 29 in the figure is a handle portion in a state of standing sideways provided on the lower surface of the bottom portion 15 of the container body 10, and reference numeral 23 is a lid opening operation provided at the upper end portion of each corner portion 14 of the container body 10. This is a notch. Reference numeral 39 denotes a handle provided on the upper surface of the lid 30. In addition, on the bottom surface of the container body 10 and the top surface of the lid body 30, arrows indicating the vertical direction of the fruits and vegetables B to be stored are respectively provided.

  Note that the inner surface of the one side wall 12a, which is on the lower side when the container body 10 is stood sideways, is protruded as required by the fruits and vegetables stored in the sideways state as described above. It is formed in a concavo-convex shape (not shown) having a shape surface, and a circulation part (not shown) for discharging water generated from fruits and vegetables is provided in the fitting part and the joint surface part with the lid.

  Examples of the foamed resin that is a constituent material of the container body 10 and the lid body 30 include styrene-modified polyolefin resin, polystyrene, high impact polystyrene, styrene-ethylene copolymer, styrene-maleic anhydride copolymer, styrene-acrylonitrile. Polystyrene resins such as copolymers, polyolefin resins such as polyethylene, polypropylene, and ethylene-vinyl acetate copolymers, and foams of various synthetic resins such as polyester resins such as polyethylene terephthalate can be used. Among them, a molded body by bead foaming of a styrene modified polyolefin resin is preferably used. The styrene-modified polyolefin resin is obtained by impregnating and polymerizing a polyolefin resin particle with a styrene monomer. Among the styrene-modified polyolefin resins, a styrene-modified polyethylene resin is preferable, for example, a styrene component The ratio is 40 to 90% by weight, preferably 50 to 85% by weight, more preferably 55 to 75% by weight. The foaming ratio of the foam is preferably 10 to 70 times.

  The molded product of styrene-modified polyolefin resin bead foam is stronger than the molded product of polypropylene resin beads having the same expansion ratio, and the shrinkage rate when a container having a depth exceeding 500 mm is molded. Low dimensional accuracy. Furthermore, there is an advantage that powder due to rubbing is less likely to be produced as compared with foamed molded products of styrene resin beads. A non-foamed resin skin layer may be provided on the surface of the foamed resin.

  According to the cold insulation container A of the above-described embodiment of the present invention, fruit vegetables B such as asparagus are aligned in the vertical direction in the container body 10 that opens upward, for example, in the case of asparagus, the tip of the tip. Align the sides and store in the horizontal direction. After the lid 30 is fitted and attached to the opening end 11 of the container body 10 in this way, it is necessary in a state where the side wall 12a on the base side of the fruits and vegetables is placed sideways so as to be the bottom (FIG. 9). Ship with or without pre-cooling depending on the condition.

  For example, at the time of shipment in early spring, when the container body 10 is not precooled, the ventilation groove 26 formed on the protruding edge 26 of the edge portion of the notch 25 of the container body 10 and the protrusion of the edge portion of the hanging piece 35 of the lid 30 are provided. By matching and opening the ventilation notch groove 38 provided on the edge 36, air permeability can be secured through the notch grooves 28 and 38, and heat generated from the fruit vegetables B such as asparagus is trapped inside the container. There is nothing. Further, when shipping with vacuum pre-cooling in summer or the like, the container main body 10 and the ventilation notch grooves 28 and 38 of the lid 30 are shifted to each other. When the vacuum precooling is performed in this state, the vacuum precooling is performed between the notched grooves 28 and 38 located at the mutually spaced positions through a gap between the convex edges 26 and 36, particularly a gap formed by the convex portions 26a and 36a. Therefore, the air permeability when returning to the atmospheric pressure after the vacuum pre-cooling can be ensured, and thereafter good sealing performance can be maintained.

  When the cold storage container A is stored and transported in the state in which the fruits and vegetables B are stored as described above, when the cold storage container A is stacked in a plurality of stages in a standing state, the side walls 12a and 12b facing the upper and lower containers are opposed to each other. The positioning projections 18a and the recesses 18b on the outer surface of the side wall are fitted and positioned, and the contact flat surfaces 17a and 17b that are partially free of draft on the outer surface of the side walls 12a and 12b As shown in FIG. 11, stacking can be performed stably without causing a tilt as shown in FIG. 11 and without causing a positional shift in the left and right directions. Can be suppressed, and workability can be improved.

  In addition, the abutment flat surfaces 17a and 17b are only present on a part of the side walls 12a and 12b of the container body 10, and most of the abutment flat surfaces 17a and 17b are formed by the side wall outer surface portion 19 with the original draft angle. There are no problems such as difficulty in die cutting.

  The cold-reserving container of the present invention can be suitably used for storing and transporting various fruit vegetables.

It is a perspective view of the container main body and lid of the cold storage container of the Example of this invention. It is a perspective view from the other direction of a container main body same as the above. It is a vertical front view of a container main body and a lid. It is a half longitudinal section side view same as the above. It is the front view which adhered the cover body. It is an expanded sectional view of the fitting part of the corner part of the cover body adhesion state. It is an expanded sectional view of the notch groove part for ventilation | gas_flowing of the cover body adhesion state. FIG. 6 is a partial cross-sectional view of the cover attached state in which the ventilation notch groove is shifted. It is a perspective view of the state which stored fruit vegetables and stood sideways. It is sectional drawing same as the above. It is sectional drawing of a stacked state. It is a partial expanded sectional view same as the above.

Explanation of symbols

  A ... Cold storage container, 10 ... Container body, 11 ... Open end, 12a, 12b ... One opposing side wall, 13a, 13b ... The other opposing side wall, 14 ... Corner part, 14a ... Outer surface, 15 ... Bottom part, 16 ... convex part, 17a, 17b ... flat surface for contact, 18a ... convex part, 18b ... concave part, 19 ... side wall outer surface part, 22 ... fitting convex part, 22a ... convex part, 23 ... notch part, 25 ... notch Notch part, 26 ... convex edge, 27 ... step part, 28 ... notch groove for ventilation, 29 ... handle part, 30 ... lid body, 31 ... peripheral edge part, 32 ... fitting concave part, 32a ... convex part, 34 ... lid body 35 ... notch part, 36 ... convex edge, 37 ... step part, 38 ... ventilation notch groove, 39 ... handle part.

Claims (8)

It consists of a container body made of a flat rectangular foam resin that opens upward, and a foam resin lid that can be attached to the opening of the container body, and after storing fruits and vegetables and depositing the lid, A cold storage container for storage and transportation in a state where it is stood sideways so that one side wall is at the bottom,
In the container body, at the time of stacking at least a pair of containers that are perpendicular to the container bottom surface and are parallel to each other at a part of the outer surface of both side walls that are vertically opposed to each other in the upright state. A cold insulation container, wherein a flat surface for contact is formed, and the flat surfaces are in contact with each other when the containers are stacked so that they can be stacked vertically.   The cold insulation container according to claim 1, wherein the flat surfaces for abutment of the opposite side walls are provided at intervals on both sides along the corners on both sides of the side walls.   The abutting flat surfaces of the opposite side walls are formed such that the abutting flat surface of one side wall is concave with respect to the outer surface of the corner portion, and the abutting flat surface of the other side wall is convex. The cold storage container according to claim 1 or 2.   The cold storage container according to any one of claims 1 to 3, wherein the outer side surfaces of the opposite corners of the opposite side walls form a vertical surface with respect to the bottom surface of the container.   A convex part and a concave part, which are fitted to each other when the containers are stacked, are formed near the parting line at the time of molding, separately from the flat surface for contact, on the outer side surfaces of the opposite side walls. The cold storage container according to any one of 4.   The cold storage container according to any one of claims 1 to 5, wherein a fitting portion that is fitted to each other is provided at an opening end portion at an upper end of the side wall of the container body and a peripheral edge portion of the lid corresponding to the opening end portion. .   A notch is formed at the center of each side of the opening end of the container body, and the pendulum fits into the notch at the center of the bottom of each side of the peripheral edge of the lid corresponding thereto The cold insulation according to claim 6, wherein a piece is provided, and an end edge portion of the cutout portion and an end edge portion of the hanging piece are provided so as to be fitted by a notched convex edge and a stepped portion. container.   The edge part of the notch part of the both-sides wall facing in the direction which cross | intersects the both side walls which have the said flat surface for contact | abutting of the said container main body, and the edge part of the drooping piece of the both sides of the said cover body corresponding to this In the attached state where the lids coincide with each other in the normal attached state of the lid body at the position of the staggered convex edge at a position shifted to the same side from the center in the width direction, and the direction is changed by 180 ° The cold insulation container according to claim 7, wherein the cutout grooves for ventilation are formed so as to be shifted from each other.

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