JP3124027U - Hand-held cold box - Google Patents

Abstract

[PROBLEMS] To fold quickly into a heat insulation box in a foldable cold storage box, reinforce the side wall strength of the double box, have a sufficient cold storage function, and moisture oozes out of the cold storage box. Provide a simple cold box designed to prevent it from coming out.
An inner box 201 made of a waterproof sheet having a bottom portion 30, front and rear side wall portions 20, left and right side wall portions 20 and a lid portion 10, a bottom portion 60, front and rear side wall portions 50, left and right side wall portions 50 and a lid portion. 40, the inner box 201 is surrounded by the outer box 202, and a gap is formed between the inner box 201 and the outer box 202. The inside box 201 is provided with side walls 21 and 21 and side walls 22 and 22 orthogonal to them, and flaps 25 and 22 are respectively provided from the upper ends of the side walls 22 and 22. 25 is bent to the inside of the inner box 201 at a substantially right angle, and the tongue pieces 26, 26, 26, 26 are bent from the both ends of the flaps 25, 25 to the inside of the inner box 201 at a substantially right angle. Shi And a handbag cool boxes characterized by being respectively inserted to these tongues 26,26,26,26 in a gap formed inside the side wall 21.
[Selection] Figure 11

Description

The present invention relates to a double cold box made of cardboard. Specifically, it is a simple cold box made of corrugated cardboard for storing items that require cold storage, such as fresh confectionery such as cakes, fresh seafood such as salmon, meat, processed foods, fruits, vegetables, beverage bottles, etc. The present invention relates to a foldable hand-held cold box that can be folded up instantaneously and that prevents a side wall from being deformed outward.

There are a variety of uses for the cold box. For example, put a frozen ice pack in the form of a pack with ice or water and a cooling agent sealed with a plastic sheet in a strong plastic box, and pack fresh seafood such as salmon, meat, processed foods, fruits, etc. Keep these freshness. This sturdy plastic box is also useful for fishing, and it is used to pack drinking water, canned beer, food, etc., and later bring back the fish caught when it is empty. In addition, fresh seafood, fruits, etc. are often packed in styrofoam boxes at souvenir shops, etc., and freshness is often maintained by ice or ice packs. Alternatively, it is also used for storing fresh fish and shellfish, fruits and the like the next day by Takkyubin (registered trademark) by putting a cooling agent in a box made of polystyrene foam or polyethylene foam. The size of the foamed cold storage box is the same, with a width of 21 cm, a depth of 15 cm, and a height of 17 cm, and contains 1 to 2 kg of dry ice. Larger ones with a width of 101 cm, a depth of 59 cm, and a height of 50 cm can be made into ice and go into 40 holes. This large size is also used for events. Thus, the cold box is conveniently used for many purposes.

The heat insulation laminated sheet used for the above cold storage boxes is proposed previously (for example, refer patent document 1). This is a heat-insulating laminated sheet in which an intermediate layer of polyethylene is interposed between an outer layer of a polyester layer and an inner layer of polyolefin, and can be used by freely folding it.

JP-A-10-329284

As described above, the conventional cold box has the following problems.

That is, in the first case, when folding the inner box of the double box, the side wall spreads outward and easily loses its shape, and it is necessary to fold while holding the side wall by hand. For this reason, it is not quick enough to fold it up into a box, and it makes the customer wait. Therefore, when used at a local product store, group customers such as bus tours concentrate on popular stores, so it is unlikely that customers will be missed.

Secondly, the cold box with a plastic outer shell can be used for outdoor purposes such as fishing and picnics, but it is too large to handle. And since it is a cold storage box for permanent use, it is difficult to place it when not in use.

Third, a sturdy and large cold box with a plastic outer wall, a foamed polystyrene, or a cold box made of polyethylene foam is difficult to dispose of.

Fourthly, the cold storage box is not usually attached with a caution label to prevent it from falling upside down, so it tends to fall down during transportation. In that case, the water and ice from the fresh fish and shellfish inside melt and the water oozes out. Such a thing is unfavorable for food hygiene and may also conflict with the PL method. In addition, there are cases where a waterproof or water-repellent solvent is not used in the interior of the cold box, which is a problem in the Food Sanitation Law.

Therefore, the simple cold box of the present invention has been made in view of the above circumstances, and in a foldable cold box, it can be quickly folded up into a heat-insulated box, and the side wall strength of the double box is reinforced, and sufficient cold insulation is provided. The object is to provide a simple cold box that has a function and is devised so that moisture does not ooze out of the cold box.

Therefore, the inventors of the present invention pay attention to the fact that the gap between the nested boxes or the corrugated corrugated core material has a heat insulating function, and the water absorbent cloth removes moisture from ice and fresh seafood. We paid attention to sucking up enough and retaining water. Then, it is developed into a cold box that combines folding from corrugated cardboard and attaching a water absorbent cloth therein, and based on this idea, it is folded from a corrugated cardboard into a box with a double box structure, and into the box. When combined with wearing a water absorbent cloth, it was found that it has a cold-retaining function and moisture does not ooze out. The simple cold box of the present invention is embodied based on such knowledge, and the device of claim 1 is a waterproof sheet made of a waterproof sheet having a bottom portion 30, front and rear side wall portions 20, left and right side wall portions 20 and a lid portion 10. An outer box 202 having a box 201, a bottom 60, front and rear side wall parts 50, left and right side wall parts 50, and a lid part 40; the inner box 201 is surrounded by the outer box 202; It is a double cold box in which a gap is formed between the outer box 202 and a handle 206 is provided on the upper surface of the cold box 200, wherein the inner box 201 has side walls 21, 21 and a side wall perpendicular to them. 22 and 22, and the flaps 25 and 25 are bent from the upper ends of the side walls 22 and 22 to the inside of the inner box 201 at a substantially right angle, respectively, and the flaps 25 and 25 are respectively bent from both ends. Tongue 6, 26, 26, 26 are bent at a substantially right angle to the inside of the inner box 201, and these tongue pieces 26, 26, 26, 26 are inserted into gaps formed inside the side walls 21, 21, respectively. It is a hand-held cold box characterized by being worn.

Here, the “water-absorbing cloth” in the present specification means a cloth for quickly catching moisture and retaining water, and is generally used for infant diapers and the like. A typical material is acrylic. In addition to diaper use, it is also used as a padding pad for cut flowers. By supplying the water absorbed by the padding to the cut flowers such as orchids, flowering can be suppressed. Will not blossom and reduce product value. For example, a water absorbent cloth made of synthetic fibers made of 25% nylon, acrylic 35%, polyester 20%, rayon 10%, and other fibers 10% containing a large amount of acrylic is industrially produced.

According to the simple cold box according to the present invention, since a gap is formed between the outer box and the inner box, it has a heat insulating function. And freshness can be maintained by stuffing fresh seafood such as salmon, meat, processed foods, fruits, vegetables and the like in the inner box, and putting ice and a cooling agent. Normally, the inner box and the outer box are individually stored as an intermediate folded body of cardboard, and can be quickly and compactly folded into a double box as necessary. As a result, it is possible to minimize the time for waiting for customers by reducing the time for boxing fresh food at the store. Further, since the water absorbent cloth is mounted in the inner box, the moisture does not ooze out of the box during transportation or carrying, and the strength of the side wall is enhanced. And since the handle is provided on the top surface of the cold storage box, it doesn't fall down on the way in the middle of carrying, and it is a hand-held type, so you can easily hold the cold drinking water inside while holding it in your hand for a long time at the exhibition hall etc. Can drink. Since the waterproof box is used for the inner box, it is economical because it can be used multiple times without being damaged by moisture.

Embodiments of the present invention will be specifically described below based on examples of the present invention illustrated in the accompanying drawings.

First, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a development view of an inner box 201 according to an embodiment of the present invention, which is a cardboard 101. FIG. 2 is a plan view of the intermediate folded body as above. FIG. 3 is a perspective view of the state in the middle of folding up. FIG. 4 is a perspective view showing a state where the folding is advanced. FIG. 5 is a perspective view of the inner box 201 in the same state as above. FIG. 6 is a perspective view of the state in which the folded inner box 201 is viewed from the bottom side. FIG. 7 is a development view of the outer box 202, which is the corrugated cardboard 102. FIG. 8 is a plan view of the intermediate folded body as above. FIG. 9 is a perspective view showing a state in the middle of folding. FIG. 10 is a perspective view of the outer box 202 in a state where the folding is completed. FIG. 11 is a perspective view showing a state in which the inner box 201 is mounted in the outer box 202. FIG. 12 is a perspective view of the hand-held cold box 200 in the state where the folding is completed. 13 is a cross-sectional view taken along the line PP in FIG. In the above plan view and cross-sectional view, the top and bottom are referred to as the up and down direction, and the left and right are referred to as the left and right direction. And the type of corrugated cardboard used for the hand-held cool box uses a thin E flute. In some cases, a thick B flute can be used. The cardboard for the inner box is a waterproof sheet that has been waterproofed with a recyclable chemical.

FIG. 1 is a middle box cardboard 101 showing a developed view of a middle box 201 according to an embodiment of the present invention. A plurality of creases are provided at predetermined locations in a shape in which four corners are cut off from a substantially rectangular cardboard. The inner box cardboard 101 has side walls 21, 21, 22, 22 divided into upper, lower, left and right sides of the middle bottom part 30 through folds in the upper, lower, left and right directions, and lid parts 10, 10 are formed above and below the side walls 21. Provided. And the sticking piece 23,23,23,23 is provided between the side wall 21 and the side wall 22 of the four corners through the diagonal crease symmetrically up and down. And the superposition | polymerization piece 24, 24, 24, 24 is provided similarly. Dotted lines in the figure indicate folds, and folds A, A, A are provided above and below the bottom 30 and folds B, B, B are provided on the left and right. Then, folds C, C and folds B, B, B are provided on the left and right in parallel to the folds A, A, A, and folds D, D, E, E are provided on the left and right. Further, fold lines F, F, F, and F are provided at four corners obliquely between the fold lines A and B. Further, flaps 25, 25 are provided at the front ends of the side walls 22, 22 on both sides so as to be bendable, and further, tongue pieces 26, 26, 26, 26, 26 are provided at the upper and lower ends of these flaps. It is extended so that it can be bent.

FIG. 7 is an outer box cardboard 102 showing a development view of the outer box 202. A plurality of creases are provided at predetermined locations in a shape in which a part of a substantially rectangular corrugated cardboard is cut off. The outer box corrugated cardboard 102 is divided into three in the vertical direction along the fold line in the left-right direction into a lid 40, a side wall 50, and a bottom 60. The dotted lines in the figure indicate the folds, and are provided with folds G, G, G in the left-right direction so as to be divided into three parts at the top, bottom, peripheral wall, and bottom, and the folds H, H, H and In parallel with these, the lid 40 is provided with folds J, J. The second-stage side wall 50 is provided with folds L, K ′, K, M, and a cut M ′ in parallel from the left in the direction perpendicular to the fold. The first-stage lid portion 40 is divided into left and right lid surfaces 42, 43, 42, and 43 via folds, and handle pieces 41 and 41 are provided on the lid surfaces 42 and 42 via folds J. The second side wall 50 is divided into left and right sticking pieces 53 and side walls 51, 52, 51, 52 through a fold. The bottom part 60 of the third stage is divided into left and right bottom surfaces 61, 62, 61, 62 through folds, and the left and right bottom surfaces 61, 61 are attached to the left and right bottom surfaces 61, 61 via diagonal folds S, S. Is provided.

The inner box cardboard 101 and the outer box cardboard 102 showing the unfolded state of the inner box 201 and the outer box 202 have the above-described configuration, and the procedure for folding them up will be described below.

From the middle box cardboard 101 in FIG. 1, the sticking piece 23 is bent through the crease B and glued to the side wall 21. The four corners on the diagonally outer side of the bottom 30 are similarly glued. And when it folds inward through the left and right creases B and B of the bottom 30 from the middle box cardboard 101 in FIG. 1, the side walls 22 and 25 are overlapped at the center, and the state shown in FIG. 2 is obtained. In this state, for example, it is stored compactly at a store. Tongue pieces 26 and 26 are visible above and below the overlapped upper one flap 25, and the other flap 25 and the upper and lower tongue pieces 26 and 26 are hidden by overlapping these.

Next, FIG. 3 shows a state in the middle of bending from the above state to the center along the bending directions Q and Q from the above state. When the side walls 21 and 21 are erected from above and below, the side walls 21 and the sticking pieces 23 are already glued at four locations, and the creases F are provided at the four corners. Get up to. Then, tongue pieces 26, 26, 26, 26, and 26 can be seen above and below the left and right flaps 25 and 25, respectively, bent from the tips of the side walls 22 and 22. Further, when the side walls 21 and 21 are bent along the bending directions Q and Q from this state, the side walls 22 and 22 are also raised at the same time as shown in FIG. And the tongue pieces 26, 26, 26, 26, 26 can be seen at the left and right ends of the flaps 25, 25 bent inward from these side walls. Furthermore, when the side walls 21 and 21 are erected, the rectangular parallelepiped inner box 201 is folded up as shown in FIG. The left flap 25 shows a state of being opened outward, and the right front flap 25 is bent inward at a substantially right angle, but the left flap 25 is also bent inward similarly to the front flap 25. The middle box 201 is folded up. At this time, each of the tongue pieces 26, 26, 26, 26 provided on both sides of the flaps 25, 25 is bent substantially perpendicularly downward and is inserted into a gap formed by the side wall 21 and the sticking piece 23. Here, it is preferable to use a thin cardboard type as the tongue piece 26 to be inserted into the gap. For example, an F flute, E flute, or B flute having a thickness of 0.6, 1.2, or 3.0 millimeters can be easily inserted into a narrow gap. When the tongue piece 26 is inserted deeply into the gap when the inner box 201 is folded, the tongue piece 26 bent downward at a substantially right angle from the front flap 25 prevents the sticking piece 23 from opening outward. Accordingly, the side wall 21 is also prevented from opening outward. The other side wall 21 is also prevented from opening outward. Therefore, it is not necessary to hold the side walls 21 and 21 by hand during the operation of inserting the tongue pieces 26 and 26 of the left flap 25 into the gap, and the folding operation is facilitated. Here, the flap 25 is in a state of being placed on the upper end portion of the sticking piece 23 and the superposed piece 24 that bends in a “shape”. FIG. 6 shows the folded state when viewed from the bottom side.

As described above, the sticking piece 23 is folded from the inner box corrugated cardboard 4 at the four positions via the crease B and glued to the side wall 21. In addition to pasting the sticking piece 23 to the side wall 21, A method of binding the sticking piece 23 to the side wall 21 by using a U-shaped staple fitting may be adopted. In this way, when the staple is used, the sticking piece 23 can be firmly stuck to the side wall 21, and the sticking piece 23 may be peeled off from the side wall 21 even if an unexpected external force is applied to the inner box. Absent.

In the outer box corrugated cardboard 102 in FIG. 7, first, the adhesive piece 53 of the side wall 50 is glued to the side wall 52, and then the two adhesive pieces 63 of the bottom 60 are glued to the bottom surface 62. Are connected endlessly, and the bottom 60 is glued in two places. When the left side wall 51 and the side wall 52 are folded to the back side through the folds K ′ and M from this state, the state shown in FIG. 8 is obtained. This is a state where the development of FIG. 7 is double-folded. In this state, it is stored compactly at the store.

Next, when the crease M and crease K ′ at both ends are pushed from the left and right sides to the center from the above state, the left and right sticking pieces 63 and the bottom face 62 are already glued, so that the box shape As shown in FIG. 9, the side walls 51, 52, 51, 52 rise and the two sets of bottom surfaces 61 and 62 are entangled with each other to form a bottom 60. Furthermore, when the fold line M and the crease line K ′ on both the left and right sides are pushed to the center from this state, the sticking piece 53 is already glued to the side wall 52 and the side wall portion 50 is connected endlessly. Since the two bottom surfaces 61 and 62 are entangled with each other to form the bottom 60 because the two bottom surfaces 61 and 62 are erected from the bottom 60, the rectangular parallelepiped outer box 202 is shown in FIG. Fold up as shown.

As described above, in the outer box corrugated cardboard 102, when the adhesive piece 53 of the side wall 50 is glued to the side wall 52 and the two adhesive pieces 63 of the bottom 60 are glued to the bottom surface 62, the side wall 50 is connected endlessly. And the bottom part 60 will be in the state glued in two places. However, depending on the case, the outer box corrugated cardboard 102 may be stored at the store with the sticking piece 53 glued to the side wall 52 at only one place.

Next, the inner box 201 is mounted into the outer box 202 from above. The state is shown in FIG. The inner box 201 is provided with a flap 25, and the tongue pieces 26 and 26 that are bent downward on both sides are hidden in the figure, but are folded downward to a gap formed between the side wall 21 and the sticking piece 23. It is inserted. This is the same for the four corners of the inner box 201. Next, when the lid 40 of the outer box 202 is closed from the front-rear direction to the center, a rectangular parallelepiped cool box 200 is completed as shown in FIG. In this way, the inner box 201 is surrounded by the outer box 202, and a gap is formed between the inner box 201 and the outer box 202. At this time, the lid surfaces 42 and 42 are closed on the upper surface of the cool box 200, and the handle pieces 41 and 41 are stood up so as to be combined. And the protruding pieces 49 and 49 provided on the upper side of the handle 206 formed by combining the handle pieces 41 and 41 are inserted into the locking holes 48 and 48 provided in the lid surfaces 43 and 43 and locked. The Further, the locking grooves 46, 46 provided on the lid surfaces 43, 43 are locked to the left and right locking grooves 47, 47 provided on the upper side of the handle 206, thereby preventing union of the handle pieces 41, 41 from coming off. In this way, the handle 206 is formed as a ridge in the left-right direction of the upper surface of the cold box 200, and the hand-held cold box is completed.

As described above, the inner box cardboard 101 is mounted in the outer box cardboard 102 to be assembled into the cold box 200. As shown in FIG. 13, the inner box 201 is surrounded by the outer box 202, and some of them are vertically and horizontally between the inner box 201 and the outer box 202. Voids are formed. A cardboard piece 203 is mounted between the bottom 30 of the inner box 201 and the bottom 60 of the outer box 202 in order to increase the cooling effect. The corrugated board piece 203 is composed of a liner, a corrugated core, and a liner in order from top to bottom, and a corrugated gap is formed in the core. On the left and right sides of the cardboard piece 203, gaps Z are formed between the bottom 30 of the middle box and the bottom 60 of the outer box. Further, in the upper part of the inner box 201, a gap W is formed between the lid part 10 of the middle box and the lid part 40 of the outer box. Further, on the left and right sides of the inner box 201, gaps Y and Y are formed on the left and right sides between the side wall 22 of the inner box and the side wall 52 of the outer box. In addition, on the left and right above the inner box 201, tongue pieces 26 and 26 bent at substantially right angles are shown in contact with the side walls 21 and 21.

The inner box cardboard 101 and the outer box cardboard 102 are folded from the inner box cardboard 101 and the outer box cardboard 102 to the inner box 201, the outer box 202, and the cold insulation box 200 as described above.

At the four corners of the inner box 201, the tongue piece 26 is bent downward at a right angle from the flap 25 and is inserted into a gap formed inside the side wall 21. This tongue piece 26 is not only easy to work because the side wall 21 can be prevented from opening outward in the process of folding the inner box 201 as described above, but the side wall 21 in the state of a double box as shown in FIG. 21 and 21 are kept upright and kept firm. That is, the tongue piece 26 bent downward at a substantially right angle from the flap 25 suppresses the side wall 21 from opening outward through the sticking piece 23, so that the side wall strength of the inner box 201 is firmly enhanced. Become.

The cold box 200 in which the inner box 201 is surrounded by the outer box 202 is completed. The storage space of the inner box 201 is filled with raw confectionery such as cake, fresh seafood such as salmon, meat, processed foods, fruits, vegetables, beverage plastic bottles, and the like, and then a cooling agent 205 is placed.

“Cryogenic agent” refers to a material that is hardened in a freezer and used as a substitute for ice, and is used for low-temperature preservation of foods, ice pillows, and the like. Some have a polymer flocculant or resin as the main component, and some contain ethylene glycol. Or the thing containing methanol is marketed. Both can be reused by hardening in a freezer.

In the cool box 200, the storage position of the cool agent 205 is leaned against the side wall 22 of the middle box 201 and placed on the bottom 30 as shown in FIG. 13, or on fresh seafood such as salmon or the like. It may be placed in a gap such as.

The cardboard piece 203 glued to the outer surface of the bottom 30 of the inner box 201 has a function as a heat insulating layer. The corrugated board piece 203 has a core sandwiched between a front liner and a back liner. The core has a corrugated shape and is effective as an air heat insulating layer. Moreover, a space | gap is formed in the up-down and right-and-left between the inner box and outer box of a cold box. These cardboard pieces 203 and voids W, Z, Y, Y have a function of an air heat insulating layer. Fresh food such as decoration cakes, cream puffs, puddings, and other fresh foods such as decoration cakes, seafood, etc. are stuffed into the cool box 200, and then a cold storage agent is added, so that fresh foods such as seafood stored therein can be efficiently stored. Keep fresh at low temperature. Because of its excellent cold insulation function, it can be sent directly from the production area without degrading freshness for gifts.

Corrugated cardboard can be produced separately for the inner box and the outer box, and each can be stored in a flat plate shape as an intermediate folded body as shown in FIGS. And it can be folded up into the cold storage box 200 instantly as needed at a store or the like.

As described above, the corrugated cardboard is made separately for the inner box and the outer box, and normally, each is stored as an intermediate folded body as shown in FIG. 2 and FIG. The outer box corrugated cardboard 102 may be stored at the store with the side wall 50 glued at only one location. In this case, the cost is reduced because there are few gluing steps, but it takes some time to fold up at the store.

Since the handle 206 is provided on the upper surface of the cold box 200 and is carried around, the top and bottom of the cold box 200 is not overturned. Therefore, moisture exuded from fresh food such as ice and seafood in the cold box 200 does not go out. Here, in the handle 206, the locking piece 45 ′ is inserted and locked in the locking hole 45, and a finger is passed through the locking hole 45 to hold the cold box 200 like a handbag.

Furthermore, since the water absorbing cloth 204 for absorbing the moisture exuded from fresh food such as salmon, seafood and the like and the water that melted the ice is installed in the inner box, the moisture is retained in the absorbent cloth. There is no such thing as lowering the commercial value such as dripping water on the stored food. As the water absorbent cloth, acrylic fiber was used. It is about 1 meter square and has a water absorption capacity of about 15 liters. The size of the cold box of this example is 28.5 cm wide, 14.5 cm deep, and 17 cm high, and is large enough to hold six long cans of beer. When one piece of this absorbent cloth having a width of 13 cm and a depth of 9 cm was installed in this cold box, water absorption of 100 ml of water was possible. It is useful because you can pack drinking water such as plastic bottles in a cold storage box when you go out for a picnic. There is no limit to applications such as outdoor grilled meat parties. With the water absorbent cloth, the moisture is retained in the inner box, and the amount of moisture that oozes out to the outer box is extremely small. Therefore, the corrugated cardboard is hardly damaged and can be used two to three times.

Since the cold box is made of corrugated cardboard, it can be disposed of without being regulated by law, unlike the polystyrene foam.

Adopting colorful colors such as red, yellow, blue, green, etc. as the color of the outer peripheral surface of the cool box, you can choose the color of the cool box according to the purpose, time and place and enjoy it.

In addition, the usage of this invention can use dry ice as a cooling medium other than ice and an ice pack in a cool box. It can also be used for transporting in the cold state so that the electrical and electronic industrial materials, semiconductor materials, etc. are placed in a cold box and the material is not altered by the time it is shipped from the factory. That is, the application can be expanded from the consumer use to the industrial field.

It is a developed view of the inner box 201 according to the embodiment of the present invention, which is a cardboard 101. It is a top view of an intermediate folding body same as the above. It is a perspective view of the state in the middle of folding same as the above. It is a perspective view of the state which folding up advanced same as the above. FIG. 4 is a perspective view of the inner box 201 in a state where folding is completed. It is a perspective view of the state which looked at the inner box 201 completed folding up from the bottom side same as the above. Same as the above, in a development view of the outer box 202, the cardboard 102. It is a top view of an intermediate folding body same as the above. It is a perspective view of the state in the middle of folding same as the above. FIG. 6 is a perspective view of the outer box 202 in a state where folding is completed. FIG. 6 is a perspective view showing a state in which the inner box 201 is mounted in the outer box 202. It is a perspective view of the hand-held cold box 200 in the state where folding is completed. FIG. 13 is a cross-sectional view taken along the line PP in FIG. 12.

Explanation of symbols

A, B, C, D, E, F, G, H, K, K ', L, M, N, R, S Folding M' Cut P Arrow view Q Folding direction W, Y, Z Air gap 101 Middle box corrugated cardboard 102 Outer box cardboard 200 Cold box 201 Middle box 202 Outer box 203 Cardboard piece 204 Water absorbent cloth 205 Coolant 206 Handle 10 Lid part 20 Side wall part 21, 22 Side wall part 23 Adhering piece 24 Flap piece 25 Flange 26 Tongue piece 30 Bottom part 40 Lid Part 41 Handle pieces 42, 43 Lid surface 45 Locking hole 45 'Locking piece 46, 47 Locking groove 48 Locking hole 49 Projection piece 50 Side wall 51, 52 Side wall 53 Adhering piece 60 Bottom 61, 62 Bottom 63 Piece

Claims (1)

An inner box 201 made of a waterproof sheet having a bottom portion 30, front and rear side wall portions 20, left and right side wall portions 20 and lid portion 10, and
An outer box 202 having a bottom portion 60, front and rear side wall portions 50, left and right side wall portions 50, and a lid portion 40;
The inner box 201 is surrounded by the outer box 202;
And while a space is formed between the inner box 201 and the outer box 202,
A double cold box provided with a handle 206 on the upper surface of the cold box 200,
The inner box 201 includes side walls 21 and 21 and side walls 22 and 22 orthogonal to them,
In addition, the flaps 25 and 25 are bent from the upper ends of the side walls 22 and 22 to the inside of the inner box 201 at a substantially right angle,
Further, the tongue pieces 26, 26, 26, 26 are bent from the respective tips of the flaps 25, 25 to the inside of the inner box 201 at a substantially right angle,
And the hand-held cold box which these tongue pieces 26,26,26,26 are each inserted in the clearance gap formed in the said side walls 21,21.

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