JP2009161237A - Cold insulating container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cold insulating container capable of obtaining sufficient cold insulating performance without causing the deterioration of storage efficiency and operation efficiency. <P>SOLUTION: In the cold insulating container 1 having peripheral walls 101 formed of insulating materials 2 and a bottom wall 100 for closing its lower end, at least one of the peripheral walls has a circulating means. The circulating means has a circulating passage 20 capable of ventilating air in the container, and also has an open section of the circulating passage which opens an inflow port at least at the upper side and an outflow port at least at the lower side of the internal surface side of the container. The circulating passage is formed of a longitudinal groove formed at the internal surface of a peripheral wall, and a cover for covering the internal surface of the peripheral wall is mounted. A ventilation window 19 is arranged at least at a position of the open section on the cover. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cold storage container that can keep the temperature of a stored item at a constant cold temperature by putting a cold storage agent together with the stored item and capping.

  As for a cold insulation container having a heat insulation performance capable of maintaining a predetermined temperature with a cold insulation agent, a lightweight foamed polystyrene box and Patent Document 1 by the present applicant are known.

  Styrofoam boxes are practical because they are lightweight and have high rigidity, so that they can be used for stacking. However, they cannot be folded when not in use, and there are problems in transportation costs due to transportation of empty boxes.

  The cold insulation container described in Patent Document 1 is a solution to the above-described problems, and includes a holding member including a bottomed box-shaped exterior sheet and a holding sheet formed inside thereof, and a heat insulating plate is placed in the holding sheet. It is configured as a box-shaped cold storage container. When the container is not used, it can be folded compactly while still in the holding sheet, and it has the rigidity that can withstand the use of stacking, thus realizing efficient transportation and cost reduction.

  Conventionally, in such a cold storage container, first, the container to be cooled is first packed in the container, and the cold storage agent is put into the space above the storage container, and the storage object is kept at a low temperature by the cold air of the cold storage agent. It has become.

  However, if the contents were packed in large quantities without gaps, the cold air would not spread throughout the contents without venting between the contents. In this case, although the vicinity of the cold-retaining agent was sufficiently kept cold, the cold air did not reach the bottom of the container, the temperature inside the container was uneven, and the whole was not sufficiently cooled.

In order to ensure the cool temperature of the stored items, on-site measures such as first packing the cold storage agent on the bottom of the cold storage container, placing the stored item on it, and then packing the cold storage agent on top of it. However, there are problems such as an increase in cost due to an increase in the amount of the cooling agent used, an increase in the number of man-hours for separately inserting the cooling agent, and a decrease in the storage efficiency of the stored items due to the presence of the cooling agent at the bottom ing.
JP 2000-203665 A

  The problem to be solved is that in the conventional cold storage container, in order to ensure sufficient cold storage performance, problems such as reduction in the storage efficiency and work efficiency of the items to be kept cold have occurred. It is an object of the present invention to provide a cold storage container that can obtain sufficient cold storage performance without deteriorating accommodation efficiency and work efficiency.

In order to solve the above-mentioned problem, the invention described in claim 1 is a cold storage container including a peripheral wall made of a heat insulating material and a bottom wall that closes a lower end thereof, wherein the peripheral wall includes a circulation means, and the circulation means includes: It has a flow passage through which gas in the container can be ventilated, and has an opening portion of a flow passage that opens at least an upper inlet and a lower outlet on the inner surface side of the container.
In the cold storage container having the above-described structure, when the stored item is put in a container formed by the peripheral wall and the bottom wall made of a heat insulating material and the cold storage agent is placed on the container, the cold air flows into and out of the flow passage through the opening. To do.
According to a second aspect of the present invention, in the configuration of the first aspect, the flow means is formed integrally with the heat insulating material, and the flow passage and the open portion are configured by vertical grooves formed on the inner surface side of the peripheral wall. And
In the cold storage container having the above-described configuration, the circulation means is formed integrally with the heat insulating material, and the cold air reaches the lower part of the container through the open portion and the flow passage formed by the vertical groove formed on the inner surface side of the container.
According to a third aspect of the present invention, in the configuration of the first aspect, the flow means is composed of a flow passage forming member separate from the heat insulating material, and the flow passage forming member is disposed inside the heat insulating material so that the flow passage is formed. And an open portion is formed.
In the cold insulation container having the above-described configuration, the flow path is easily formed on the peripheral wall by disposing the flow path forming member separate from the heat insulating material on the inner surface side of the heat insulating material.
According to a fourth aspect of the present invention, in the configuration of the first aspect, the bottom wall includes second flow means, and the second flow means has a flow passage through which gas in the container can be vented and the inner surface of the container. An opening portion of the flow passage that is open to the side, and the opening portion includes an inlet on at least one side of the peripheral wall including the circulation means and an outlet that discharges cool air. To do.
The cold storage container having the above configuration ensures air permeability at the bottom of the container by the circulation means formed on the bottom wall.
According to a fifth aspect of the present invention, in the configuration of the first aspect, a cover capable of protecting the inner surface side is attached to the peripheral wall, and the gas in the container is attached to the cover at least at the position of the outlet. Is provided with a ventilation window that can flow into the flow passage.
In the cold storage container having the above-described configuration, the inner surface side of the peripheral wall is protected by the cover, and the ventilation property of the flow path is ensured by the ventilation window provided in the cover.
According to a sixth aspect of the present invention, in the configuration of the fifth aspect, the ventilation window is formed of a mesh.
In the cold storage container having the above-described configuration, the ventilation window is formed of a mesh, and protects the inner surface of the container where the ventilation window is formed while ensuring the air permeability of the flow path.
According to a seventh aspect of the present invention, in the configuration of the fifth aspect, the peripheral wall and the bottom wall are formed of separate heat insulating plates, and the cover can hold the heat insulating plate in a rectangular box shape in plan view. And a flexible holding member that can be folded while holding the heat insulating plate.
The cold storage container having the above configuration is held in a stackable box shape when used, and is folded compactly when not in use.
According to an eighth aspect of the present invention, in the configuration of the first aspect, a reinforcing member having an inverted U-shaped cross section is provided at the upper end of the peripheral wall.
The cold insulation container having the above-described configuration ensures air permeability by the flow passage formed in the peripheral wall and obtains a predetermined rigidity by the reinforcing member.
The invention described in claim 9 is a bottomed box shape having a rectangular shape in plan view, and a cover portion, a bottom wall, and four peripheral walls are formed by combining heat insulating plates on each surface of the flexible holding member. In addition, a pair of side surfaces and a bottom wall opposite to each other of the peripheral wall are formed so as to be foldable while holding the heat insulating plate material, and at least one of the peripheral walls is formed with a vertical groove through which gas in the container can be vented. A ventilation window constituting the outflow inlet of the vertical groove is formed by a mesh at least on the outflow inlet of the inner surface of the holding member for holding the heat insulating plate.
The cold storage container having the above configuration is folded in a compact manner when not in use and is held in a box-shaped container that can be stacked when in use, and if the container is filled with a cold storage object and a cold storage agent is placed thereon, the cold air is retained. Inflow or outflow from the ventilation window of the member.

  If the container and the cold-retaining agent are accommodated by a conventional method in which the container is filled with the stored item and then placed on the stored item, the cold air of the cold-reserving agent is reduced. It flows into the flow path through the opening and flows out of the flow path. As a result, the cool air in the upper part of the container reliably reaches the bottom of the container, and the whole is sufficiently cooled, so that the contents packed in the lower part of the container can be held at a sufficiently low temperature.

  According to the second aspect of the present invention, the cold storage container is formed with a flow path and an open portion through which the cool air passes by a vertical groove formed on the inner surface of the peripheral wall. As a result, a cold container excellent in cooling performance can be configured at low cost by an easy molding method.

  In the cold insulation container configured as described in claim 3, the circulation means is formed on the peripheral wall by attaching the flow path forming member separate from the heat insulating material. As a result, the flow path can be formed at a low cost with a simple configuration, and the rigidity of the cold insulation container can be improved by the flow path forming member.

  According to the fourth aspect of the present invention, the bottom wall is provided with the second circulation means, and the air passage at the bottom of the container is ensured by the flow passage of the second circulation means and the open portion thereof. As a result, the cool air reliably spreads to a position far from the peripheral wall at the bottom of the container, and the entire container is held at a sufficiently low temperature.

  In the cold insulation container configured as described in claim 5, the inner surface of the peripheral wall is protected by the cover and is prevented from being damaged by the contents, and the ventilation property is ensured by the ventilation window disposed at the position of the open portion. As a result, the flow means provided in the peripheral wall ensures that the cool air is surely spread from the cryogen at the top of the container to the bottom of the container and has sufficient cooling performance, and the conveyance performance can be improved by using a lightweight heat insulating material. Excellent durability.

  The cold storage container configured as described in claim 6 protects the inner surface of the container in the part where the ventilation window is formed by the mesh that configures the ventilation window. As a result, the contents packed in the container are prevented from entering the flow path from the ventilation window, and the flow path is not blocked by the stored contents, so that the cold air of the coolant is surely passed through the flow path. Can be kept cool.

  The cold storage container configured as described in claim 7 is formed in a box shape that can be stacked when in use, and can be folded to be compact when not in use. As a result, it has sufficient cooling performance and accommodation efficiency and is excellent in transportation efficiency.

  The cold storage container configured as described in claim 8 has a predetermined rigidity that can withstand use by being stacked by attaching a reinforcing member to the upper end of the peripheral wall. As a result, it is possible to form a flow passage having a width necessary for sufficient cold air flow to reliably cool the entire container, and to improve work efficiency and transport efficiency.

  The cold-insulated container configured as described in claim 9 is foldable when not in use and is held in a box-shaped container at the time of use, and is formed in the container by a ventilation window formed in the holding member and a longitudinal groove formed in the heat insulating plate. Air permeability is ensured. As a result, the transportation efficiency is excellent, and the circulation of the cold air in the container is ensured by the ventilation window and the vertical groove, so that the whole is sufficiently kept cool.

  Hereinafter, with reference to FIG. 1 thru | or FIG. 3, embodiment of the cold storage container which concerns on this invention is described. FIG. 1 is a partially broken perspective view in which a part of a cold storage container according to the present invention is disassembled, FIG. 2 is an enlarged cross-sectional view of the upper part of the peripheral wall, and FIG. 3 is an enlarged cross-sectional view of the lower part of the peripheral wall.

  As shown in FIG. 1, the cold container 1 according to the present embodiment includes a box-shaped exterior sheet 10 having a bottom surface, four side surfaces, and a lid, and a retaining member 11 provided inside the exterior sheet 10. And holding a heat insulating plate 2 to form a bottomed box-shaped container. First, the heat insulating plate material 2 will be described.

  The heat insulating plate 2 is formed of a synthetic resin material having sufficient heat insulating properties such as polypropylene, polyethylene, and expanded polystyrene. The heat insulating plate member 2 is formed with a flow means including a flow passage through which gas in the container can be vented and an opening portion of the flow passage opened to the inner surface of the container.

  In this embodiment, the distribution means is formed integrally with the heat insulating plate 2. The distribution means is composed of a plurality of vertical grooves 20 and 20 formed on the inner surface side of the heat insulating plate material 2, and the vertical grooves 20 constitute a flow passage and an open portion. The distribution means is not limited to such a longitudinal groove. Details of other embodiments will be described later.

  Next, the holding member will be described. A handle 12 for improving the workability of carrying the cold insulation container 1 is provided on the outer side of the opposing side surfaces of the exterior sheet 10. Moreover, the connection piece 13 provided in the outer side upper edge part of the side surface is provided with the surface fastener 14, and when it is stacked, it is connected to the surface fastener 15 provided in the lower side edge part of the other side of the cold storage container. In addition to preventing the collapse of the load, when it is placed on the uppermost stage or not stacked, it is connected to hook and loop fasteners (not shown) provided on both side edges of the lid to improve the closure of the lid. The lid also includes a closing piece 16 having a hook and loop fastener for holding the lid in a closed state.

  The holding sheet 11 is formed on each of the bottom surface, each side surface, and the lid of the exterior sheet 10, and the insulating sheet material 2 (details will be described later) constituting the bottom wall 100, the peripheral wall 101, and the lid portion 102. To form a bottomed box shape having a rectangular shape in plan view with predetermined heat insulation performance and rigidity. In the present embodiment, the holding sheet 11 covers the bottom wall 100, the peripheral wall 101, and the inner surface of the lid portion 102. This holding sheet is provided with a ventilation window 19. Details of the ventilation window 19 will be described later.

  Next, the configuration of the peripheral wall 101 of the cold container 1 will be described. As shown in cross section in FIG. 2, the holding sheet 11 on the side surface is formed so that the upper end opens and closes, and a hook and loop fastener is attached to the opening and closing end 17. Further, a holding piece 18 having a surface fastener is provided inwardly projecting from the upper part of the outer sheet 10, and the upper end of the holding sheet 11 is closed by the holding piece 18 and the surface fastener of the open / close end 17 to hold the outer sheet 10. The heat insulating plate 2 inserted between the sheets 11 is held. The heat insulating plate 2 is taken in and out from the open / close end.

  As shown in FIG. 1, a ventilation window 19 is formed on the inner surface of the holding sheet 11 on the side surface. As shown in FIGS. 2 and 3, the ventilation window 19 is formed at least at the upper part and the lower part of the inner surface of the holding sheet 11 to constitute an inlet and an outlet of the circulation means. The position where the upper ventilation window 19 is formed may not be the uppermost end portion of the holding sheet 11, but at least when the cooling object is packed in the cold container, the ventilation window 19 is not hidden by the cold object. It is preferable to form at a position.

  The ventilation window 19 is preferably constituted by a mesh-shaped ventilation member. The mesh-shaped ventilation member may be configured by a cloth or the like provided with a mesh having a degree of roughness that prevents the object to be cooled stored in the cold insulation container 1 from passing therethrough.

  Although the ventilation window 19 of this embodiment is formed in the upper part and the lower part of the holding sheet 11, you may comprise a ventilation window also in positions, such as the center part of the holding sheet 11, and may comprise an outflow port. . Further, the entire inner surface of the holding sheet 11 may be the ventilation window 19 by configuring the holding sheet 11 with a mesh-shaped ventilation member.

  In the illustrated example, the ventilation sheet is provided in the holding sheet 11 only on one side surface among the side surfaces of the cold insulation container 1, but the ventilation window may be provided on all side surfaces. Furthermore, a ventilation window may be provided on the bottom surface.

  Next, the configuration of the lid portion 102 of the cold container 1 will be described. As shown in FIG. 2, the lid portion 102 includes an exterior sheet 10 and a holding sheet 11 provided inside the exterior sheet 10, and a hook-and-loop fastener (not shown) provided at the opening end of the holding sheet 11 and the interior of the exterior sheet 10. The opening end of the holding sheet 11 is closed by the holding piece 18 projecting in the direction, and the heat insulating plate 2 is held between the sheets 10 and 11.

  The exterior sheet 10 constituting the peripheral wall 101 includes a protruding piece 10 a protruding upward from the upper surface of the heat insulating plate 2 held by the holding sheet 11. The protruding piece 10a protrudes upward by the thickness of the lid portion 102, and the upper end portion of the peripheral wall 101 is stepped. The lid 102 is fitted into the stepped portion. The front end side of the exterior sheet 10 is formed on a closing piece 16 having a surface fastener (not shown), and the lid portion 102 is closed by a surface fastener (not shown) provided on the exterior sheet 10 of the peripheral wall 101. .

  Next, the configuration of the bottom wall 100 of the cold container 1 will be described. As shown in FIG. 3, the bottom wall 100 includes an outer holding sheet 110 and an inner holding sheet 111. Both holding sheets 110 and 111 are configured such that one side end side can be opened and closed and can be closed by a surface fastener (not shown), and the heat insulating plate member 2 is put in and out from the opening and closing end. The side end opposite to the opening side end is attached to the peripheral wall, and is configured to be foldable by causing both holding sheets 110 and 111 while holding the heat insulating plate 2.

  The exterior sheet 10 is formed of a flexible member, and in addition to the holding sheets 110 and 111 of the bottom wall 100, the left rear side surface and the right front side surface in FIG. In addition, it is possible to fold the holding sheets on the left back side surface, the right front side surface, and the bottom surface by sewing the edge and attaching it to another peripheral wall.

  The bottom wall 100 of the present embodiment includes second circulation means. That is, as shown in FIG. 3, a ventilation window 19 is formed in the holding sheet 111 inside the bottom wall 100. The ventilation window 19 is formed in the vicinity of at least one of the peripheral wall 101 provided with the circulation means, and constitutes the inlet of the second circulation means. Further, the ventilation window 19 constituting the outlet of the second circulation means is formed in the vicinity of the central part of the container or the peripheral wall on the opposite side.

  The ventilation window 19 constituting the inflow port is preferably formed at a position close to the peripheral wall 101. The ventilation window 19 is preferably constituted by a mesh-shaped ventilation member. The mesh-shaped ventilation member may be configured by a cloth or the like provided with a mesh having a degree of roughness that prevents the object to be cooled stored in the cold insulation container 1 from passing therethrough.

  Next, another embodiment of the distribution means will be described. First, another embodiment of the vertical groove will be described. In FIG. 1, a plurality of vertical grooves extending from one end to the other end of the heat insulating plate 2 are formed, but vertical grooves reaching from the ventilation window 19 constituting the inflow port to the ventilation window 19 constituting the outflow port are formed. Just do it. Further, the entire surface of the vertical groove 20 can be an open portion, but the inlet and outlet are portions facing the ventilation window 19. In FIG. 1, vertical grooves are formed on the entire inner surface of the heat insulating plate 2, but the vertical grooves may be formed on a part of the inner side of the heat insulating plate only on the left side of the inner surface or only in the center. Good.

  The vertical groove 20 may have a wide or narrow width. That is, the width of the longitudinal groove 20 may be gradually increased from the inlet side to the outlet side. By forming the width of the vertical groove 20 wide and narrow, the cold air of the cold insulating agent can easily flow to the outlet side of the vertical groove 20, and the bottom of the cold storage container 1 can be more reliably cooled.

  As another embodiment of the flow passage, in addition to the vertical groove, a horizontal groove or an oblique groove is formed on the inner surface of the heat insulating plate material, and the cool air flows from the ventilation window 19 that forms the inlet to the ventilation window 19 that forms the outlet. These grooves may be communicated with each other so as to flow. In FIG. 1, only the vertical grooves in the direction perpendicular to the bottom surface are shown, but the vertical grooves only need to reach the outlet from the inflow port. Not limited to. That is, the groove may be an oblique groove reaching the outlet from the inlet or a groove reaching the outlet from the inlet by communicating the oblique groove and the lateral groove.

  As still another embodiment of the flow passage, a hole having a size not exceeding the plate thickness is formed inside the heat insulating plate member 2 to form a flow passage, and the flow passage is formed on the inner surface of the heat insulating plate member 2. It is good also as a structure which opens the inflow port used as an opening part, and an outflow port.

  Further, the distribution means may be formed by the flow path forming member 21 that is separate from the heat insulating plate 2. FIG. 4 shows a schematic cross-sectional view thereof. In the illustrated example, the flow path forming member 21 is held by the holding means together with the heat insulating plate member 2, and the flow path forming member 21 forms a flow path and an open portion on the peripheral wall.

  The flow passage forming member 21 shown in FIG. 4 is made of a plate material having a mountain-fold fold in a folding screen, and the flow passage is formed by the unevenness of the fold portion. The shape of the flow path forming member is not limited to the folding-like uneven shape shown in FIG. 4, but may also be an uneven shape such as a corrugated plate shape, a saw shape, or a kamaboko shape.

  Moreover, the outline of another embodiment of a flow path forming member is shown in FIG. In the illustrated example, the heat insulating plate member 2 is held by holding means, while a separate flow passage forming member 22 is disposed on the inner surface side of the container to form a flow passage and an open portion. Although the flow path forming member 22 in the illustrated example is formed of an uneven plate material, a folding screen or corrugated plate as described above may be used.

  Moreover, the outline of another embodiment of a flow path forming member is shown in FIG. The flow path forming member 23 according to the present embodiment includes a plate body 230 having an open portion 231 that constitutes an inflow / outlet, and a spacer 232 that forms a gap between the plate body 230 and the heat insulating plate material 2.

  The spacer 232 in the example is formed integrally with the plate body 230, and may be held by the holding member together with the heat insulating plate material 2 as shown in FIG. 4, or held by the holding member as shown in FIG. Instead, it may be arranged on the inner surface side of the container. When the flow path forming member 23 is held together with the heat insulating plate member 2 by the holding member, the plate body 230 and the spacer 232 may be separated. Moreover, you may provide a spacer in a heat insulating board | plate material.

  The flow path forming members 21, 22, and 23 shown in FIGS. 4 to 6 can be formed by processing a plastic plate material, an aluminum thin plate material, or the like. Further, the flow path forming members 21 and 22 shown in FIGS. 4 and 5 may be formed by forming a folding screen-like or wave-like unevenness on the inner surface side of a thick plate member such as plastic.

  By disposing the flow path forming member separate from the heat insulating plate material inside the heat insulating plate material, the flow path can be easily formed without processing the heat insulating plate material, and the flow path forming member is used for cooling. The rigidity of the container can be improved.

  A reinforcing member 3 having a U-shaped cross section is attached to the upper end of the peripheral wall. The reinforcing member 3 is preferably formed of aluminum or the like. The reinforcing member 3 is preferably attached to all of the upper ends of the heat insulating plate 2 of the peripheral wall forming the flow passage, but sufficient rigidity can be obtained only by attaching only to the heat insulating plate 2 of the peripheral wall having the long side. it can.

  In the illustrated example, the reinforcing member 3 is attached to the upper end of the heat insulating plate formed integrally with the distribution means. However, even when the distribution means is formed separately from the heat insulating plate, the upper end of the heat insulating plate or the heat insulation is formed. A reinforcing member may be attached to the upper ends of the conductive plate material and the flow path forming means

  Although the cold insulation container 1 of this embodiment comprises the container which hold | maintains the heat insulating board | plate material 2 in the box shape with the holding member which consists of the exterior | packing sheet 10 and the holding sheet 11, this invention is limited to the said embodiment. Absent. That is, it is possible to form a cold insulation container according to the present invention by forming a groove or the like as a flow path on the side wall of the heat insulating container made of foamed polystyrene or the like and the inner surface of the bottom wall.

  Below, an effect | action and effect of the cold storage container by the said structure are demonstrated.

  As shown in FIG. 2, when the cold object A is packed in the cold container 1 and the cold insulation agent B such as dry ice is placed thereon, the cold air of the cold insulation agent B can be obtained even if the cold object A is densely packed. As shown by the arrows in FIG. 2, the air flows from the ventilation window 19 (inflow port) formed in the upper part of the holding sheet 11 into the vertical groove 20 (flow path) formed in the heat insulating plate 2.

  And this cold air distribute | circulates the vertical groove 20, and flows out from the ventilation window 19 (outflow port) formed in the lower part of the holding | maintenance sheet | seat 11, as shown by the arrow in FIG. Cool the cooled object A packed in the bottom.

  As shown in FIG. 3, if the second circulation means including the ventilation window 19 and the flow passage 20 is also formed in the bottom wall 100, the cold air that has reached the lower part of the cold insulation container 1 through the peripheral wall 101 is Furthermore, it reaches a position away from the peripheral wall 101 through the ventilation window 19 and the flow passage 20.

  As a result, the cold storage container does not incur an increase in costs due to a decrease in work efficiency or an increase in the amount of use of the cold storage agent, by the same work as before in which a cold storage object is packed in a cold storage container and a cold storage agent is placed thereon. The cold air of the cold-retaining agent at the top of the container spreads to the bottom of the container, so that the object to be cooled packed in the cold-insulated container can be kept at a sufficiently low temperature. In addition, since the ventilation window is formed in the holding sheet and the flow path is formed in the heat insulating plate, the accommodation efficiency is not lowered.

  Furthermore, since the flow path of this embodiment is comprised by the groove | channel formed in the inner surface of a heat insulating board | plate material, it can form easily and cheaply.

  Furthermore, since the inner surface of the heat insulating plate material of the present embodiment is covered with the holding cover, the inner surface of the heat insulating plate material is protected so as not to be damaged, and is excellent in durability. Further, when the flow passage is constituted by a vertical groove as in the present embodiment, the holding cover prevents the cold object from clogging in the vertical groove, so that the flow of cold air is not hindered and the cold air is surely contained in the container. Can reach the bottom.

  Furthermore, by forming the ventilation window with mesh, the contents packed in the container can be prevented from entering the flow path from the ventilation window, and the flow path is not blocked by the stored contents, The cold air of the cold insulation agent can surely keep the whole through the flow path.

  Furthermore, by covering the heat insulating plate with two holding sheets and making it foldable, it is formed into a stackable box shape, and can be folded and compact when not in use, with sufficient cooling performance. In addition to accommodating efficiency, it also excels in transportation efficiency.

  Furthermore, by attaching a U-shaped reinforcing member to the upper end of the peripheral wall, the cold insulation container has a predetermined rigidity that can withstand the use of being stacked, and forms a flow passage with a sufficient width for the circulation of cool air As a result, the entire container can be reliably cooled, and work efficiency and transportation efficiency can be improved.

  Furthermore, by forming the flow path and the ventilation window on the bottom wall, the cool air reliably reaches a position far from the peripheral wall of the container bottom, and the entire container can be kept at a sufficiently low temperature.

It is the partially broken perspective view which decomposed | disassembled some cold storage containers which concern on this invention. It is an expanded sectional view of the peripheral wall upper part of a cold storage container. It is an expanded sectional view of the peripheral wall lower part of a cold storage container. It is a plane sectional view showing an outline of an embodiment of a flow passage formation member. It is a plane sectional view showing an outline of another embodiment of a flow passage formation member. It is a perspective view of another embodiment of a flow path formation member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cold storage container 10 Exterior sheet 100 Bottom wall 101 Perimeter wall 102 Cover part 10a Protrusion piece 11 Holding sheet 110 Outer holding sheet 111 Inner holding sheet 12 Handle 13 Connecting piece 14, 15 Surface fastener 16 Closing piece 17 Opening upper end 18 Holding piece DESCRIPTION OF SYMBOLS 19 Ventilation window 2 Thermal insulation board material 20 Longitudinal groove 21-23 Flow path formation member 230 Plate body 231 Opening part 232 Spacer 3 Reinforcement member A Cooled object B Coolant

Claims (9)

In a cold insulation container having a peripheral wall made of a heat insulating material and a bottom wall that closes its lower end,
The peripheral wall includes a flow means, and the flow means has a flow passage through which gas in the container can be vented, and opens a flow passage that opens at least an upper inlet and a lower outlet on the inner surface of the container. A cold storage container characterized by having a portion.   The cold storage container according to claim 1, wherein the circulation means is formed integrally with the heat insulating material, and the flow passage and the open portion are constituted by vertical grooves formed on the inner surface side of the peripheral wall.   2. The flow passage forming member comprises a flow passage forming member separate from the heat insulating material, and the flow passage forming member is disposed inside the heat insulating material to form the flow passage and the open portion. Cold storage container.   The bottom wall includes a second flow means, and the second flow means has a flow passage through which gas in the container can be vented, and an opening portion of the flow passage that opens to the inner surface of the container. 2. The cold insulation container according to claim 1, wherein the opening portion includes at least an inflow port on at least one side of the peripheral wall including the circulation means and an outflow port for discharging cold air.   A cover capable of protecting the inner surface side is attached to the peripheral wall, and a ventilation window through which the gas in the container can flow into the flow passage is provided at least at the position of the outlet of the opening. The cold storage container according to claim 1.   The cold insulation container according to claim 5, wherein the ventilation window is formed of a mesh.   The peripheral wall and the bottom wall are made of separate heat insulating plates, and the cover can hold the heat insulating plate in a rectangular box shape in plan view and can be folded while holding the heat insulating plate. 6. The cold insulation container according to claim 5, wherein the container is made of a flexible holding member.   The cold storage container according to claim 1, further comprising a U-shaped reinforcing member at an upper end of the peripheral wall.   It is a bottomed box shape having a rectangular shape in plan view, and a heat insulating plate material is combined with each surface of the flexible holding member to form a box-shaped lid portion, a bottom wall and four peripheral walls, and the peripheral wall The pair of opposing side surfaces and bottom wall are formed so as to be foldable while holding the heat insulating plate material, and at least one of the peripheral walls is formed with a longitudinal groove through which the gas in the container can be vented, and this heat insulating property. A cold storage container, wherein a ventilation window constituting the outflow inlet of the vertical groove is formed at least on the outflow inlet of the inner surface of the holding member for holding the plate material.

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