JP2004236579A - Method for maintaining freshness of perishable food - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for maintaining the freshness of perishable food by which the freshness of the perishable food can be surely maintained. <P>SOLUTION: The method for maintaining the freshness of perishable food comprises the following process: placing cuttlefish (perishable food) 3 on crushed ice (ice) 2 put in a styrene foam plastic box 1 having an opening part 1a at the upper part thereof; detachably closing the opening part 1a with a styrene foam plastic cap 4; and putting a freshness keeping sheet 5 made of a water-impermeable shock-absorbing sheet and having a lot of through holes 5a between the crushed ice 2 and the cuttlefish 3. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for maintaining freshness of fresh food such as fish and shellfish.
[0002]
[Prior art]
As a conventional technique of this type, a method of placing fishes and the like on crushed ice housed in a so-called fish box or the like made of expanded polystyrene or the like is often used.
[0003]
Among fish and shellfish, squid is, for example, a tray in which a plurality of unit trays each having a U-shaped cross section are connected in the width direction, and each unit tray is provided with drain holes at both ends. In addition, it is also known to use a squid-containing tray (for example, see Patent Document 1) made of a synthetic resin such as polyethylene, polypropylene, polyethylene terephthalate, or the like. The squid accommodating tray is placed on crushed ice contained in a so-called fish box, and squids are placed on the squid accommodating tray.
[0004]
[Patent Document 1]
Japanese Utility Model Registration No. 3082067 (Claim 1, FIGS. 1-3)
[0005]
[Problems to be solved by the invention]
However, when seafood is placed on crushed ice, cell degradation due to pressing based on the weight of the seafood or the like, so-called ice burning (partial excessive cooling or freezing by ice), melting water generated from crushed ice and seafood The swelling of turbid liquid with drip spilled out of seafood reduces the freshness and appearance of the fish and shellfish in contact with the crushed ice, and reduces the merchantability (qualification as a product) and taste of seafood. There is.
[0006]
Further, even when the squid is placed on the squid storage tray, the squid may come into contact with the brownish squid storage tray due to cell deterioration or so-called ice burning due to the weight of the squid. There is a problem that the freshness of the squid portion is reduced, the portion is turned white, and the merchantability and taste of the squid are reduced.
[0007]
The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a method of maintaining freshness of fresh food, which can surely maintain freshness of fresh food.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the freshness retaining sheet according to claim 1 places fresh food on ice stored in a foamed plastic box having an opening at the top, and detachably attaches the opening with a foamed plastic lid. In the method for maintaining freshness of a fresh food product to be closed, a freshness maintenance sheet made of a non-water-retentive buffer sheet and having a large number of through holes is interposed between the ice and the fresh food product.
[0009]
According to a second aspect of the present invention, there is provided a method for maintaining freshness of a fresh food product, wherein the fresh food product is placed on ice stored in a foamed plastic box having an opening at an upper portion, and the opening is removably closed with a foamed plastic lid. A freshness holding sheet provided with a waterproof sheet and a number of buffer protrusions projecting from one surface of the waterproof sheet at an interval from each other, the ice and the fresh food product in a state where the waterproof sheet is directed downward. It is interposed between them.
[0010]
According to a third aspect of the present invention, there is provided a method for maintaining freshness of a fresh food product, wherein the fresh food product is placed on ice contained in a foamed plastic box having an opening at an upper portion, and the opening is detachably closed with a foamed plastic lid. In, the freshness holding sheet provided with a buffer sheet having a number of ventilation holes and a waterproof sheet attached to one surface of the buffer sheet, the ice and the fresh food product with the waterproof sheet facing downward It is interposed between them.
[0011]
According to a fourth aspect of the present invention, there is provided a method for maintaining freshness of a fresh food product, wherein the fresh food product is placed on ice contained in a foamed plastic box having an opening at an upper portion, and the opening is detachably closed with a foamed plastic lid. , A waterproof sheet is interposed between the ice and the fresh food product, and a freshness maintaining sheet including a buffer sheet having a large number of ventilation holes is interposed between the waterproof sheet and the fresh food product.
[0012]
According to a fifth aspect of the present invention, there is provided a method for maintaining freshness of a fresh food product, wherein the fresh food product is placed on ice stored in a foamed plastic box having an opening at an upper portion, and the opening is detachably closed with a foamed plastic lid. In the above, the ice is sealed in at least one bag, and a freshness holding sheet including a buffer sheet having a large number of ventilation holes is interposed between the bag and the fresh food product.
[0013]
According to a sixth aspect of the present invention, the fresh food product is supported by supporting the fresh food product above the ice contained in the foamed plastic box having an opening at the top, and removably closing the opening with a foamed plastic lid. A freshness retaining sheet comprising a buffer sheet having a large number of ventilation holes is stretched horizontally in the foamed plastic box or above the foamed plastic box at an interval above the ice, and the freshness retaining sheet is provided. The fresh food product is placed on the top.
[0014]
The invention according to claim 7 is characterized in that a stamp member having a stamp, a character, a figure, or a symbol engraved thereon is interposed between the freshness holding sheet and the fresh food product with the stamp facing upward, and By pressing a food product against the stamp surface by its own weight, reducing the freshness of the pressed portion in the fresh food product from the freshness of other portions, and discoloring the pressed portion, the character, the graphic, or the symbol It is transferred to fresh food.
[0015]
According to an eighth aspect of the present invention, at least one of the upper surface and the lower surface of the freshness maintaining sheet is provided with irregularities.
[0016]
According to a ninth aspect of the present invention, a freshness maintaining sheet having a non-water retaining buffer sheet and having a large number of through holes is interposed between the fresh food products.
[0017]
According to a tenth aspect of the present invention, there is provided a method of maintaining freshness of a fresh food product in which a fresh food product is placed on ice stored in a foamed plastic box having an opening at an upper portion, and the opening is detachably closed with a foamed plastic lid. , The fresh food product is sealed in a bag together with at least water, and the bag is placed on the ice.
[0018]
In the eleventh aspect of the present invention, the plurality of fresh foods are sealed in the bag, and each of the fresh foods is individually wrapped with a freshness holding sheet made of a buffer sheet.
[0019]
According to a twelfth aspect of the present invention, the foamed plastic lid comprises a foamed plastic box having an opening at an upper portion.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a method for maintaining freshness of fresh food according to the first embodiment is, for example, squid (fresh food) placed on crushed ice (ice) 2 housed in a foamed plastic box 1 having an opening 1a at the top. Product 3 is placed, and the opening 1a is removably closed by the foamed plastic lid 4. The freshness maintaining sheet 5 is interposed between the crushed ice 2 and the squid 3.
[0021]
The foamed plastic box 1 is formed in a rectangular box shape in plan view from foamed plastic, and has an opening 1a at the top.
[0022]
The crushed ice 2 is accommodated in the foamed plastic box 1 so as to have a thickness of several cm. The size of the ice is not particularly limited, and may be crushed ice 2 of several mm to several cm, or lump of ice or plate ice of several cm to several tens of cm. Ice such as crushed ice 2 can also be stored so that fresh food is buried to a predetermined depth such as crushed ice 2 in order to prevent stress concentration on the lower part of fresh food such as squid 3.
[0023]
The squid 3 is placed on the crushed ice 2 via the freshness holding sheet 5. In addition, the fresh food is not limited to the squid 3, but is a conventionally known product such as a fresh product (unprocessed product) of seafood including the squid 3, a processed product such as a cut or fillet of the seafood, and a vegetable. Applicable to various things. Here, the said seafood is a general term for marine animals, and includes sardines, herring, mackerel, saury, aji, buri, hockey, tuna, bonito, shark, cod, scallop, flounder, flounder, Thai salmon・ Fish such as trout, eel, ayu and puffer fish, mollusks such as squid and octopus, crustaceans such as shrimp, crab and ami, shellfish such as scallop, oyster, swordfish, clam, clam, clam, abalone and turtle, sea urchin (Echinoderm marine bile), sea cucumber (Echinoderm marine rodent), and marine mammals such as whale meat are also included.
[0024]
The foamed plastic lid 4 is formed in a rectangular plate shape from foamed plastic, and is placed on the foamed plastic box 1 so as to removably close the opening 1 a of the foamed plastic box 1. In addition, examples of the foamed plastic constituting the foamed plastic box 1 and the foamed plastic lid 4 include foamed polystyrene, foamed polyethylene, foamed polypropylene, and foamed polyurethane. Further, the size of the foamed plastic box 1 and the foamed plastic lid 4 are not particularly limited, and those having an appropriate size according to the size and number of fresh foods can be adopted.
[0025]
As shown in FIGS. 2 and 3, the freshness retaining sheet 5 is formed of a non-water retaining buffer sheet, and has a large number of through holes 5a. The non-water-retentive buffer sheet includes, for example, a plurality of foamed plastic rods 6 formed of flexible foamed plastic having closed cells and having flexibility. The plurality of foamed plastic rods 6 are arranged in parallel at an interval from each other and in two upper and lower tiers. The plurality of foamed plastic rods 6 in the upper row and the plurality of foamed plastic rods 6 in the lower tier are mutually connected. It is fused and integrated so that the length directions intersect at a predetermined angle to form a net.
[0026]
Since the foamed plastic rod 6 is made of foamed plastic having closed cells, it is not water-retentive and has a cushioning property and a heat insulating property. The mesh of the freshness retaining sheet 5 in which a plurality of foamed plastic rods 6 are fused and integrated in a net shape is a non-water-retaining through hole 5a. Examples of such a freshness retaining sheet 5 include “Fruit mat” (trade name, manufactured by Daicel Novafoam Co., Ltd.). Further, on both surfaces of the freshness preserving sheet 5, irregularities 7 each composed of a plurality of foamed plastic rods 6 and a large number of through holes 5 a are provided.
[0027]
In addition, as the foamed plastic constituting the foamed plastic rod 6, the above-mentioned appropriate one can be adopted. Further, the diameter of the foamed plastic rod 6 is not particularly limited, and an appropriate size of several mm to several tens mm can be adopted.
[0028]
Here, as shown in FIGS. 4 and 5, the freshness retaining sheet 5 is constituted by a non-water retaining buffer sheet or the like in which a plurality of plastic pipes 8 are connected in parallel with a plurality of warps 9 at intervals. You can also.
[0029]
The plastic pipe 8 is non-water-retentive because it is formed in a cylindrical shape (straw shape) from plastic, and has a cushioning property and a heat insulating property. The gap between the plurality of plastic pipes 8 is a non-water-retaining through hole 5a. Further, on both surfaces of the freshness preserving sheet 5, irregularities 7 composed of a plurality of plastic pipes 8 and a large number of through holes 5a are respectively provided.
[0030]
In the example shown in FIG. 4 and FIG. 5, the plurality of plastic pipes 8 are connected by alternately passing the upper and lower two warps 9 through the through holes 5a, but the connecting means is not limited to this. Instead, various conventionally known techniques can be adopted. Examples of the plastic constituting the plastic pipe 8 include polyvinyl chloride, polyethylene, and polypropylene. In addition, the diameter of the plastic pipe 8 is not particularly limited, and an appropriate size of several mm to several tens mm can be adopted.
[0031]
If the freshness maintaining sheet 5 configured as described above is interposed between the crushed ice 2 and the squid 3, even if gravity or an impact force during transportation acts on the squid 3, the freshness maintaining sheet 5 has a buffering property. The squid 3 is not pressed against the freshness holding sheet 5 with excessive force. In addition, due to the buffering property of the freshness maintaining sheet 5, lateral displacement of the squid 3 during transportation or the like can be prevented. Furthermore, since the portion of the freshness retaining sheet 5 other than the through holes 5a is thermally insulated, the portion of the squid 3 that is in contact with the freshness retaining sheet 5 is not excessively cooled by the crushed ice 2, so that so-called ice burning may occur. In addition, the crushed ice 2 is hardly melted, and the cooling by the crushed ice 2 is continued for a long time. Therefore, the usage of the crushed ice 2 can be reduced, and the thickness of the foamed plastic box 1 and the foamed plastic lid 4 can be reduced. In this case, since the volumes of the foamed plastic box 1 and the foamed plastic lid 4 can be reduced, the storage efficiency and transport efficiency of the squid 3 can be improved. In addition, since the freshness holding sheet 5 has a large number of through holes 5a, the squid 3 is appropriately cooled through these through holes 5a, and the temperature difference between the upper part and the lower part of the squid 3 does not increase. In addition, the freshness preserving sheet 5 is also excellent in water permeability due to the presence of the large number of through holes 5a, and the drip and excrement flowing out of the squid 3 are quickly discharged to the two layers of crushed ice and adhere to the body surface of the squid 3. do not do. That is, according to the freshness maintaining sheet 5, the internal space formed by the foamed plastic box 1 and the foamed plastic lid 4 is maintained at an ice chamber 2A in which the crushed ice 2 is accommodated and the squid 3 is maintained at an appropriate cooling temperature. It can be partitioned into the room 3A. Further, since the freshness retaining sheet 5 is non-water retaining, the melted water generated from the crushed ice 2 does not permeate the upper freshness retaining sheet 5 and does not have a possibility of swelling in the squid 3. As described above, according to the freshness retaining sheet 5, there is an advantage that the freshness of the squid 3 can be surely retained, and the merchantability and taste of the squid 3 can be prevented from being reduced.
[0032]
The cooling temperature of fresh food such as squid 3 is not particularly limited, and the size and amount of ice, and the amount of freezing point depressant such as salt (sodium chloride) added, should be adjusted. Therefore, it is sufficient to keep the temperature at an appropriate temperature according to the type of fresh food, but in order to reliably maintain freshness, a temperature at which the fresh food does not freeze, for example, 1 to 5 ° C., preferably It is desirable that the temperature be 3 to 5 ° C.
[0033]
Here, in the case where the fresh food is squid 3, even if the squid 3 is placed on the freshness holding sheet 5, the box packing work is performed due to the buffering property of the freshness holding sheet 5 and the heat insulating property of the parts other than the through holes 5a. And squid 3 can be prevented from being subjected to stress caused by a sudden change in temperature or the like.
[0034]
Further, if the unevenness 7 is provided on the upper surface of the freshness holding sheet 5 as in this embodiment, the contact area of the squid 3 with the freshness holding sheet 5 can be reduced, and the freshness of the squid 3 can be held more reliably. There are advantages. Further, if the irregularities 7 are provided on the lower surface of the freshness holding sheet 5, the contact area of the freshness holding sheet 5 with the crushed ice 2 can be reduced, so that there is an advantage that so-called ice burning of the squid 3 can be more reliably prevented.
[0035]
Furthermore, if a freshness holding sheet similar to the freshness holding sheet 5 is interposed between the squids 3, the contact between the squids 3 can be prevented, and there is an advantage that the freshness of the squid 3 can be held more reliably.
[0036]
As shown in FIG. 6, for example, in the method for maintaining freshness of fresh food according to the second embodiment, three foam plastic boxes 1 are stacked in the first embodiment, and a foam plastic lid is placed on the top foam plastic box 1. 4 is placed.
[0037]
A recess 1b for fitting is formed around the opening 1a at the top of the foam plastic box 1, and a fitting for fitting to be fitted into the recess 1b of the foam plastic box 1 below at the bottom of the foam plastic box 1. The projection 1c is formed. Further, a lower part of the foamed plastic lid 4 is formed with a fitting projection 4c fitted into the recessed part 1b of the foamed plastic box 1. The state inside the foamed plastic box 1 is the same as in the first embodiment.
[0038]
That is, the foamed plastic lid for removably closing the opening 1a of the lowermost foamed plastic box 1 is composed of the middle foamed plastic box 1 having the opening 1a at the top. The foamed plastic lid for removably closing the opening 1a of the middle foamed plastic box 1 is constituted by the uppermost foamed plastic box 1 having the opening 1a at the top.
[0039]
When stacking the foamed plastic boxes 1, the upper foamed plastic box 1 is placed on the lower foamed plastic box 1 so that the projections 1 c of the upper foamed plastic box 1 are fitted into the concave portions 1 b of the lower foamed plastic box 1. Should be placed. Regarding the topmost foamed plastic box 1, the foamed plastic lid 4 may be placed on the foamed plastic box 1 such that the projection 4 c of the foamed plastic lid 4 is fitted into the recess 1 b of the foamed plastic box 1. .
[0040]
As described above, if the foamed plastic lid is constituted by the foamed plastic box 1 having the opening 1a at the upper portion, the freshness of the squid 3 can be maintained in a state where the foamed plastic boxes 1 are stacked, so that the mass storage of the squid 3 And has the advantage that mass transportation is possible. Further, as in this embodiment, if the concave portion 1b and the convex portion 1c are formed in the foamed plastic box 1 and the convex portion 4c is formed in the foamed plastic lid 4, the lateral displacement of the foamed plastic box 1 and the foamed plastic lid 4 can be achieved. Can be prevented.
[0041]
As shown in FIGS. 7 and 8, the freshness keeping method of the fresh food according to the third embodiment uses a freshness keeping sheet 35 instead of the freshness keeping sheet 5 in the first embodiment, for example.
[0042]
The freshness retaining sheet 35 includes a waterproof sheet 36 and a number of buffer protrusions 37 projecting from one surface of the waterproof sheet 36 at intervals.
[0043]
The waterproof sheet 36 is made of, for example, a plastic sheet made of polyvinyl chloride, polyethylene, polypropylene, or the like, and has a thickness of several hundred μm to several mm. The buffer protrusion 37 is formed of, for example, a convex portion 39 which is integrally formed on a surface of the waterproof sheet 36 by being fused and integrated with the plastic sheet 38 similar to the waterproof sheet 36 at intervals. Each is formed in a hollow columnar shape having a height and a diameter of several mm to several tens mm. Therefore, the buffer protrusion 37 has a buffering property and a heat insulating property. Examples of such a freshness maintaining sheet 35 include “Air Cap” (trade name, manufactured by Ube Industries, Ltd.). The configuration of the buffer protrusion 37 is not particularly limited, and may be formed by fusing and integrating or bonding a cylindrical cushioning material made of foamed plastic or the like to one surface of the waterproof sheet 36. Further, the shape of the buffer protrusion 37 may be a prism, a polygonal pyramid, a cone, a hemisphere, or the like, in addition to a column.
[0044]
The freshness retaining sheet 35 configured as described above may be interposed between the crushed ice 2 and the squid 3 with the waterproof sheet 36 facing downward. In a state where the freshness retaining sheet 35 is interposed, the waterproof sheet 36 is placed on the crushed ice 2, so that the melted water generated from the crushed ice 2 can be prevented from contacting the upper buffer protrusion 37. Therefore, even when the buffer projections 37 have water retention, the molten water does not penetrate into the upper buffer projections 37 and there is no possibility of swelling in the squid 3. Further, even if gravity or an impact force during transportation acts on the squid 3, the squid 3 is not pressed against the freshness holding sheet 5 by an excessive force due to the buffering property of the buffer protrusion 37. Furthermore, the cushioning property of the buffer protrusion 37 can prevent the squid 3 from shifting laterally during transportation or the like. In addition, since the portion of the squid 3 in contact with the buffer protrusion 37 is not excessively cooled by the crushed ice 2 due to the heat insulating property of the buffer protrusion 37, so-called ice scorching does not occur, and the crushed ice 2 is also melted. The cooling by the crushed ice 2 lasts for a long time. Therefore, similarly to the first embodiment, the usage of the crushed ice 2 can be reduced, and the thickness of the foamed plastic box 1 and the foamed plastic lid 4 can be reduced. In this case, since the volumes of the foamed plastic box 1 and the foamed plastic lid 4 can be reduced, the storage efficiency and transport efficiency of the squid 3 can be improved. Further, since the space 35a exists between the buffer protrusions 37, the squid 3 is appropriately cooled via the waterproof sheet 36 and the space 35a, and the temperature difference between the upper part and the lower part of the squid 3 does not increase. That is, according to the freshness holding sheet 35, similarly to the first embodiment, the internal space formed by the foamed plastic box 1 and the foamed plastic lid 4 can be partitioned into the ice compartment 2A and the freshness keeping chamber 3A. Therefore, there is an advantage that the freshness of the squid 3 can be surely maintained, and that the merchandise and taste of the squid 3 can be prevented from lowering.
[0045]
Here, if the unevenness 7 is provided on the lower surface of the freshness holding sheet 35 by providing a large number of buffer protrusions 37 on the other surface of the waterproof sheet 36, the contact area of the freshness holding sheet 35 with the crushed ice 2 can be reduced. There is an advantage that the so-called ice burn of the squid 3 can be more reliably prevented.
[0046]
As shown in FIG. 9, a freshness keeping method for fresh food according to the fourth embodiment uses a freshness keeping sheet 45 instead of the freshness keeping sheet 5 in the first embodiment, for example.
[0047]
The freshness holding sheet 45 includes a buffer sheet 46 having a large number of air holes, and a waterproof sheet 47 attached to one surface of the buffer sheet 46.
[0048]
The buffer sheet 46 is formed of, for example, a sponge having a thickness of several mm to several tens of mm from foamed plastic having open cells forming a large number of air holes, and has a buffering property and a heat insulating property, and has a water retention property. Also have. As the foamed plastic, the above-mentioned appropriate one can be adopted. The waterproof sheet 47 may be the same as the waterproof sheet 36 of the third embodiment. In addition, as the buffer sheet having a large number of air holes, a nonwoven fabric having a thickness of several mm to several tens mm can be adopted.
[0049]
The freshness retaining sheet 45 configured as described above may be interposed between the crushed ice 2 and the squid 3 with the waterproof sheet 47 facing downward. In a state where the freshness retaining sheet 45 is interposed, the waterproof sheet 47 is placed on the crushed ice 2, so that the melted water generated from the crushed ice 2 can be prevented from coming into contact with the upper buffer sheet 46. Therefore, even when the buffer sheet 46 has a water retention property, the molten water does not penetrate into the upper buffer sheet 46 and there is no possibility of swelling in the squid 3. Further, even if gravity or an impact force during transportation acts on the squid 3, the squid 3 is not pressed against the freshness holding sheet 45 by an excessive force due to the buffering property of the buffer sheet 46. Further, the cushioning property of the buffer sheet 46 can prevent the squid 3 from shifting sideways during transportation or the like. In addition, since the portion of the squid 3 that is in contact with the buffer sheet 46 is not excessively cooled by the crushed ice 2 due to the heat insulating properties of the buffer sheet 46, so-called ice scorching does not occur and the crushed ice 2 is also melted. The cooling by the crushed ice 2 lasts for a long time. Therefore, similarly to the first embodiment, the usage of the crushed ice 2 can be reduced, and the thickness of the foamed plastic box 1 and the foamed plastic lid 4 can be reduced. In this case, since the volumes of the foamed plastic box 1 and the foamed plastic lid 4 can be reduced, the storage efficiency and transport efficiency of the squid 3 can be improved. Further, since a large number of air holes are present in the buffer sheet 46, the squid 3 is appropriately cooled through the waterproof sheet 47 and the air holes, and the temperature difference between the upper part and the lower part of the squid 3 does not increase. That is, according to the freshness holding sheet 45, similarly to the first embodiment, the internal space formed by the foamed plastic box 1 and the foamed plastic lid 4 can be partitioned into the ice compartment 2A and the freshness keeping chamber 3A. Therefore, there is an advantage that the freshness of the squid 3 can be surely maintained, and that the merchandise and taste of the squid 3 can be prevented from lowering.
[0050]
In this embodiment, the freshness maintaining sheet 45 in which the buffer sheet 46 and the waterproof sheet 47 are integrated is used. However, the present invention is not limited to this, and the waterproof sheet 47 is provided between the crushed ice 2 and the squid 3. At the same time, a freshness maintaining sheet made of a buffer sheet having a large number of air holes such as a buffer sheet 46 can be interposed between the waterproof sheet 47 and the squid 3. This case also has the same advantages as described above.
[0051]
As shown in FIG. 10, a freshness keeping method for a fresh food according to the fifth embodiment is, for example, a freshness keeping sheet 55 having the same configuration as the freshness keeping sheet 45 and the unevenness 7 provided on the upper surface in the fourth embodiment, as shown in FIG. Is used.
[0052]
The unevenness 7 is provided by integrally forming, for example, a large number of quadrangular pyramid-shaped protrusions 57 on the upper surface of the freshness holding sheet 55. The shape of the protrusion 57 is not particularly limited, and may be a triangular pyramid, a cone, a column, a prism, a hemisphere, or the like, in addition to a quadrangular pyramid.
[0053]
If the freshness holding sheet 55 configured as described above is interposed between the crushed ice 2 and the squid 3, the contact area of the squid 3 with the freshness holding sheet 55 can be reduced, and in addition to the advantages of the fourth embodiment, There is an advantage that freshness of the squid 3 can be maintained more reliably.
[0054]
Here, if a number of projections 57 such as a quadrangular pyramid are integrally formed on the other surface of the waterproof sheet 47 and the unevenness 7 is provided on the lower surface of the freshness holding sheet 55, Therefore, there is an advantage that the so-called ice burn of the squid 3 can be more reliably prevented.
[0055]
As shown in FIG. 11, the fresh food product freshness maintaining method according to the sixth embodiment is, for example, in the fourth embodiment, the crushed ice 2 is sealed in a plurality of bags 61.
[0056]
If the crushed ice 2 is sealed in the bag body 61 as described above, the molten water generated from the crushed ice 2 does not flow out of the bag body 61. However, there is an advantage that the squid 3 does not penetrate into the freshness holding sheet 45 and swell.
[0057]
The number and size of the bags 61 are not particularly limited. For example, all the crushed ice 2 can be sealed in one large bag 61. Further, the material of the bag body 61 and the sealing means are not particularly limited, and various conventionally known techniques can be adopted. Further, in this embodiment, the freshness holding sheet 45 having the waterproof sheet 47 is used. However, the present invention is not limited to this. It is also possible to use a freshness holding sheet made of a buffer sheet having a large number of air holes, such as a freshness holding sheet 35 having a buffer projection 37 and a buffer sheet 46.
[0058]
As shown in FIG. 12, in the freshness keeping method of fresh food according to the seventh embodiment, for example, instead of placing the freshness keeping sheet 5 on the crushed ice 2 in the first embodiment, the squid 3 is replaced with seawater (water). ) 71 together with a bag 72, and the bag 72 is placed on the crushed ice 2.
[0059]
In this manner, if the squid 3 is sealed in the bag 72 together with the seawater 71, the squid 3 does not come into contact with the crushed ice 2 or is pressed against the crushed ice 2, so that the freshness of the squid 3 is ensured. There is an advantage that can be held.
[0060]
In addition, when the fresh food is seafood such as squid 3, it is desirable to enclose it in the bag 72 together with the seawater 71. However, when the fresh food is freshwater, lake water, river water, tap water, It is desirable to enclose the bag 72 together with fresh water such as well water or mineral water. Further, a mixture of water and ice (so-called water ice) can be sealed in the bag body 72. Furthermore, the bag 72 can be the same as the bag 61 of the sixth embodiment, and the appropriate size, material, sealing means, and the like are not particularly limited.
[0061]
Furthermore, although the squid 3 is enclosed one by one in each bag 72, the present invention is not limited to this, and a plurality of squids 3 can be enclosed in each bag 72, respectively. In this case, the plurality of squids 3 may be wrapped in freshness holding sheets made of a suitable buffer sheet, such as the freshness holding sheets 5, 35, 45, and 55 described above. In this way, if a plurality of squids 3 enclosed in the same bag body 72 are wrapped with freshness holding sheets, the squids 3 do not come into contact with each other, so that the freshness of the squid 3 can be held more reliably. There are advantages.
[0062]
As shown in FIGS. 13 to 15, for example, the freshness keeping method of the fresh food according to the eighth embodiment is such that, in the fourth embodiment, the squid 3 is supported above the crushed ice 2 and the opening is formed by the foamed plastic lid 4. 1a is detachably closed, and a freshness holding sheet 45 is stretched horizontally from the crushed ice 2 in the foamed plastic box 1 at an interval upward, and the squid 3 is placed on the freshness holding sheet 45. To do.
[0063]
A recess 1b for fitting is formed around the opening 1a at the top of the foamed plastic box 1, and a plurality of locking projections 1d for locking the freshness holding sheet 45 are formed in the recess 1b at intervals. It is protruded. The foamed plastic lid 4 has, for example, a concave cross section, and a fitting projection 4c fitted into the recessed portion 1b of the foamed plastic box 1 is formed below the foamed plastic lid 4. A plurality of fitting holes 4d, into which the locking projections 1d are fitted, are formed in the projection 4c at intervals. Further, a plurality of locking holes 45d to be engaged with the locking projections 1d are formed at intervals on the peripheral edge of the freshness holding sheet 45.
[0064]
After accommodating the crushed ice 2 in the foamed plastic box 1, the freshness retaining sheet 45 is stretched horizontally above the crushed ice 2 by engaging the locking holes 45 d with the locking projections 1 d, respectively. The squid 3 is placed on a freshness holding sheet 45 stretched horizontally. The foamed plastic lid 4 is mounted on the foamed plastic box 1 such that the projection 4c is fitted into the recess 1b of the foamed plastic box 1 and the locking projection 1d is fitted into the fitting hole 4d. . That is, the peripheral portion of the freshness retaining sheet 45 is locked by the locking projections 1d of the foamed plastic box 1 and is sandwiched between the concave portion 1b of the foamed plastic box 1 and the convex portion 4c of the foamed plastic lid 4. Has become. Therefore, even if the weight of the squid 3 is large, it is possible to reliably prevent the freshness holding sheet 45 from coming into contact with the crushed ice 2. The freshness retaining sheet 45 is formed by appropriately changing the positions and shapes of the concave portion 1b and the locking protrusion 1d of the foamed plastic box 1 and the convex portion 4c and the fitting hole 4d of the foamed plastic box 4. You may make it extend horizontally in the upper direction.
[0065]
As described above, since the freshness holding sheet 45 does not contact the crushed ice 2, it is possible to prevent the melted water generated from the crushed ice 2 from contacting the freshness holding sheet 45 above. Therefore, even when the buffer sheet 46 has water retention, the molten water does not penetrate into the buffer sheet 46 above, and there is no possibility of swelling in the squid 3. In addition, since the portion of the squid 3 that is in contact with the buffer sheet 46 is not excessively cooled by the crushed ice 2, so-called ice scorching does not occur, and the crushed ice 2 is hardly melted. continue. Therefore, similarly to the first embodiment, the usage of the crushed ice 2 can be reduced, and the thickness of the foamed plastic box 1 and the foamed plastic lid 4 can be reduced. In this case, since the volumes of the foamed plastic box 1 and the foamed plastic lid 4 can be reduced, the storage efficiency and transport efficiency of the squid 3 can be improved. Furthermore, an appropriate amount of a freezing point depressant can be added to the crushed ice 2 to lower the temperature of the crushed ice 2, and in this case, the squid 3 can be stored and transported at a lower temperature. In addition, even if gravity or an impact force during transportation acts on the squid 3, the squid 3 is not pressed against the freshness holding sheet 45 by an excessive force due to the buffering property of the buffer sheet 46. In addition, due to the cushioning property of the buffer sheet 46, it is possible to prevent the squid 3 from shifting laterally during transportation or the like. Further, the squid 3 is appropriately cooled via the freshness holding sheet 45, and the temperature difference between the upper part and the lower part of the squid 3 does not increase. That is, according to the freshness holding sheet 45, similarly to the first embodiment, the internal space formed by the foamed plastic box 1 and the foamed plastic lid 4 can be partitioned into the ice compartment 2A and the freshness keeping chamber 3A. Therefore, there is an advantage that the freshness of the squid 3 can be surely maintained, and that the merchandise and taste of the squid 3 can be prevented from lowering.
[0066]
In this embodiment, the freshness holding sheet 45 having the waterproof sheet 47 is used. However, the present invention is not limited to this. It is also possible to use a freshness holding sheet made of a buffer sheet having a large number of air holes, such as a freshness holding sheet 35 having a buffer projection 37 and a buffer sheet 46.
[0067]
As shown in FIGS. 16 to 18, for example, the freshness preserving method for perishable food according to the ninth embodiment includes, in the fourth embodiment, each of the letters “A”, “B”, and “C” on the stamp face 91 a. A stamp member 91 on which reverse images 92a, 92b, and 92c are engraved is interposed between the freshness holding sheet 45 and the squid 3 with the stamp surface 91a facing upward, and the squid 3 is pressed against the stamp surface 91a by at least its own weight. By reducing the freshness of the pressed portion of the squid 3 from the freshness of the other portions and discoloring the pressed portion, the characters 93a, 93b, 93c of "A", "B", and "C" are replaced by the squid 3 Is to be transferred to the surface.
[0068]
As shown in FIGS. 16 and 17, for example, the stamp member 91 is composed of a stamp sheet 94 made of synthetic rubber or the like, and an “A” made of synthetic rubber or the like and engraved on the upper surface of the stamp sheet 94 in a convex shape. , "B", and "C" are provided with inverted images 92a, 92b, and 92c, respectively. It should be noted that, in addition to characters, figures and symbols may be engraved on the stamp surface 91a of the stamp member 91, and characters and the like may be engraved on the stamp surface 91a of the stamp member 91 in a concave shape.
[0069]
If the stamp member 91 configured as described above is interposed between the freshness holding sheet 45 and the squid 3, the squid 3 is pressed against the stamped surface 91a by gravity, impact force during transportation, or the like. Therefore, during storage or transportation of the squid 3, the freshness of the pressed portion is lower than the freshness of the other portions and changes color, and as shown in FIG. 18, each of “A”, “B”, and “C” The characters 93a, 93b, 93c are transferred to the lower part of the squid 3. Therefore, if characters, graphics, or symbols indicating the product name, supplier name, or the like of the squid 3 are engraved on the stamp face 91a, the product name, the supplier name, or the like can be directly attached to the squid 3. There are advantages.
[0070]
In this embodiment, the freshness holding sheet 45 having the waterproof sheet 47 is used. However, the present invention is not limited to this. It is also possible to use a freshness holding sheet composed of a buffer sheet having a large number of air holes, such as a freshness holding sheet 35 having a buffer projection 37 and a buffer sheet 46.
[0071]
【The invention's effect】
As described above, according to the first aspect of the present invention, since the freshness retaining sheet composed of the non-water retaining buffer sheet and having a large number of through holes is interposed between the ice and the fresh food, the foamed plastic box and The internal space formed by the foamed plastic lid can be partitioned into an ice room containing ice and a freshness holding room for keeping fresh food at an appropriate cooling temperature. Therefore, freshness of the fresh food can be reliably maintained, and a decrease in the merchantability and taste of the fresh food can be prevented.
[0072]
According to the second aspect of the present invention, the freshness maintaining sheet having the waterproof sheet and the large number of buffer projections is interposed between the ice and the fresh food with the waterproof sheet facing downward. In addition to the same effect, even when the buffer projections have water retention, the melt water generated from the ice does not penetrate the upper buffer projections, and there is no possibility of swelling in the fresh food product.
[0073]
According to the invention of claim 3, since the freshness maintaining sheet including the buffer sheet and the waterproof sheet having a large number of air holes is interposed between the ice and the fresh food with the waterproof sheet facing downward, In addition to the same effects as those of the first aspect, even when the buffer sheet has water retention, the melt water generated from ice does not penetrate into the upper buffer sheet, and there is no possibility of swelling in the fresh food product.
[0074]
According to the invention of claim 4, the waterproof sheet is interposed between the ice and the fresh food product, and the freshness holding sheet formed of the buffer sheet having a large number of ventilation holes is interposed between the waterproof sheet and the fresh food product. This has the same effect as the third aspect.
[0075]
According to the fifth aspect of the present invention, ice is sealed in at least one bag, and a freshness holding sheet comprising a buffer sheet having a large number of ventilation holes is interposed between the bag and fresh food. In addition to the same effects as described in the item 1, the molten water generated from the ice does not flow out of the bag. Therefore, even if the freshness holding sheet has water retention, there is no possibility that the molten water permeates the freshness holding sheet and swells in the fresh food product.
[0076]
According to the invention of claim 6, a freshness holding sheet composed of a buffer sheet having a large number of air holes is stretched horizontally in the foamed plastic box or on the foamed plastic box with an interval from ice upward. Since the fresh food product is placed on the sheet, in addition to the same effect as in the first aspect, an appropriate amount of freezing point depressant can be added to ice to lower the temperature of the ice. Therefore, in this case, the fresh food can be stored and transported at a lower temperature.
[0077]
According to the invention of claim 7, the stamp member is interposed between the freshness holding sheet and the fresh food with the stamp face facing upward, and the fresh food is pressed against the stamp face by its own weight, and the Characters, graphics, or symbols are transferred to fresh foods by lowering the freshness of the pressed part from the freshness of other parts and discoloring the pressed part, so the brand name or supplier name of the fresh food product is printed on the stamp face By engraving characters, graphics, or symbols indicating the name of the food, the name of the product, the name of the supplier or the like can be directly given to the fresh food.
[0078]
According to the invention of claim 8, since at least one of the upper surface and the lower surface of the freshness holding sheet is provided with irregularities, the contact area of the fresh food product with the freshness holding sheet and ice can be reduced, and the fresh food product Freshness can be maintained more reliably.
[0079]
According to the ninth aspect of the invention, since the freshness maintaining sheet composed of the non-water-retentive buffer sheet and having a large number of through holes is interposed between the fresh food products, the contact between the fresh food products can be prevented. Therefore, freshness of fresh food can be more reliably maintained.
[0080]
According to the invention of claim 10, the fresh food is sealed in a bag with at least water and the bag is placed on ice, so that the fresh food comes into contact with ice or is pressed against ice. Therefore, freshness of the fresh food can be reliably maintained.
[0081]
According to the eleventh aspect of the present invention, a plurality of fresh food products are sealed in the bag body, and each of the fresh food products is wrapped with a freshness holding sheet made of a buffer sheet. They do not come into contact with each other, so that the freshness of the fresh food can be maintained more reliably.
[0082]
According to the twelfth aspect of the present invention, since the foamed plastic lid is made of a foamed plastic box having an opening at an upper portion, freshness of the fresh food can be maintained in a state where the foamed plastic boxes are stacked, so that a large amount of fresh food is produced. Storage and mass transport are possible.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view showing a method for maintaining freshness of fresh food according to a first embodiment.
FIG. 2 is an enlarged sectional view of a main part in the vicinity of a freshness holding sheet of FIG.
FIG. 3 is an enlarged plan view of a main part of the freshness maintaining sheet of FIG. 1;
FIG. 4 is an enlarged plan view of a main part showing another example of a freshness holding sheet.
FIG. 5 is an enlarged sectional view of a main part of the freshness maintaining sheet of FIG. 4;
FIG. 6 is a schematic cross-sectional view illustrating a method of maintaining freshness of fresh food according to a second embodiment.
FIG. 7 is an enlarged sectional view of a main part showing a method for maintaining freshness of fresh food according to a third embodiment.
FIG. 8 is an enlarged plan view of a main part of the freshness holding sheet of FIG. 7;
FIG. 9 is an enlarged sectional view of a main part showing a method for maintaining freshness of fresh food according to a fourth embodiment.
FIG. 10 is an enlarged sectional view of a main part showing a method for maintaining freshness of fresh food according to a fifth embodiment.
FIG. 11 is a schematic sectional view showing a method for maintaining freshness of fresh food according to a sixth embodiment.
FIG. 12 is a schematic cross-sectional view illustrating a method for maintaining freshness of fresh food according to a seventh embodiment.
FIG. 13 is a schematic sectional view showing a method for maintaining freshness of fresh food according to an eighth embodiment.
FIG. 14 is an enlarged cross-sectional view of a main part near a locking hole of the freshness maintaining sheet of FIG. 13;
15 is an essential part enlarged plan view showing a state in which the freshness holding sheet of FIG. 13 is stretched in a horizontal direction.
FIG. 16 is an enlarged sectional view of a main part showing a method for maintaining freshness of fresh food according to a ninth embodiment.
FIG. 17 is an enlarged plan view of a main part showing a state where the stamp member of FIG. 16 is placed on a freshness holding sheet.
FIG. 18 is an enlarged plan view of a main part showing a state where characters are transferred to a lower part of a squid.
[Explanation of symbols]
1 foam plastic box
1a Opening
2 crushed ice (ice)
3 squid (fresh food)
4 Foam plastic lid
5 Freshness maintenance sheet
5a Through hole
7 Unevenness
35 Freshness maintenance sheet
36 tarpaulin
37 buffer projection
45 Freshness maintenance sheet
46 buffer sheet
47 Tarpaulin
55 Freshness maintenance sheet
61 bag
71 Seawater (water)
72 bags
91 Stamp material
91a Seal
93a, 93b, 93c characters

Claims (12)

A method for maintaining freshness of a fresh food product, wherein the fresh food product is placed on ice stored in a foamed plastic box having an opening at an upper portion and the opening is removably closed with a foamed plastic lid,
A freshness preserving method for a fresh food product, wherein a freshness preserving sheet composed of a non-water retaining buffer sheet and having a large number of through holes is interposed between the ice and the fresh food product. A method for maintaining freshness of a fresh food product, wherein the fresh food product is placed on ice stored in a foamed plastic box having an opening at an upper portion and the opening is removably closed with a foamed plastic lid,
A freshness holding sheet having a waterproof sheet and a number of buffer projections projecting from one surface of the waterproof sheet at intervals from each other is placed between the ice and the fresh food product with the waterproof sheet facing downward. A method for maintaining freshness of a fresh food product, wherein the freshness is maintained. A method for maintaining freshness of a fresh food product, wherein the fresh food product is placed on ice stored in a foamed plastic box having an opening at an upper portion and the opening is removably closed with a foamed plastic lid,
A freshness maintaining sheet including a buffer sheet having a large number of air holes and a waterproof sheet attached to one surface of the buffer sheet, between the ice and the fresh food product with the waterproof sheet facing downward. A method for maintaining freshness of fresh food, characterized by intervening. A method for maintaining freshness of a fresh food product, wherein the fresh food product is placed on ice stored in a foamed plastic box having an opening at an upper portion and the opening is removably closed with a foamed plastic lid,
A fresh sheet is interposed between the ice and the fresh food product, and a freshness maintaining sheet made of a buffer sheet having a large number of ventilation holes is interposed between the waterproof sheet and the fresh food product. How to keep food fresh. A method for maintaining freshness of a fresh food product, wherein the fresh food product is placed on ice stored in a foamed plastic box having an opening at an upper portion and the opening is removably closed with a foamed plastic lid,
The freshness of a fresh food product, wherein the ice is sealed in at least one bag, and a freshness holding sheet comprising a buffer sheet having a large number of ventilation holes is interposed between the bag and the fresh food. Retention method. A method for maintaining freshness of a fresh food product, wherein the fresh food product is supported above the ice contained in a foamed plastic box having an opening at an upper portion and the opening is removably closed with a foamed plastic lid,
A freshness holding sheet composed of a buffer sheet having a large number of ventilation holes is horizontally stretched in the foamed plastic box or on the foamed plastic box at an interval above the ice with an interval therebetween, and the fresh food is placed on the freshness holding sheet. A method for maintaining freshness of a fresh food product, comprising placing a product. A stamp member having a stamp, a character, a figure, or a symbol engraved thereon is interposed between the freshness holding sheet and the fresh food with the stamp facing upward, and the fresh food is stamped by its own weight. To transfer the characters, graphics, or symbols to the fresh food product by lowering the freshness of the pressed portion of the fresh food product than the freshness of other portions and discoloring the pressed portion. Item 7. The method for maintaining freshness of a fresh food product according to any one of Items 1 to 6. The freshness maintaining method for a fresh food product according to any one of claims 1 to 7, wherein irregularities are provided on at least one of an upper surface and a lower surface of the freshness maintaining sheet. The freshness maintaining method for fresh food according to any one of claims 1 to 8, wherein a freshness maintaining sheet comprising a non-water-retentive buffer sheet and having a large number of through holes is interposed between the fresh foods. A method for maintaining freshness of a fresh food product, wherein the fresh food product is placed on ice stored in a foamed plastic box having an opening at an upper portion and the opening is removably closed with a foamed plastic lid,
A method for maintaining freshness of a fresh food, wherein the fresh food is sealed in a bag together with at least water, and the bag is placed on the ice. The freshness keeping method for fresh food according to claim 10, wherein a plurality of the fresh foods are sealed in the bag body, and each fresh food is packaged with a freshness keeping sheet made of a buffer sheet. . The freshness preserving method for a fresh food product according to any one of claims 1 to 11, wherein the foamed plastic lid comprises a foamed plastic box having an opening at an upper portion.

Images