JP2002337970A - Egg tray and egg package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an egg tray which can easily prevent growth of salmonellae and is preferable as a returnable egg tray for an automatic egg filling apparatus wherein even if a plurality of trays are piled at random and collected, they do not stick to each other, and to provide an egg package comprising a combination of the egg tray and a setup box-formed container which can easily prevent growth of the salmonellae and can be used in a returnable manner. SOLUTION: The egg tray is made of a synthetic resin sheet and has numerous egg storage recesses arranged. Protrusions in a reversely tapered shape are formed on an upper surface of the egg tray.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an egg tray for transporting eggs, and an egg package in which eggs are packaged in multiple stages using the egg tray and a box type container.

[0002]

2. Description of the Related Art Conventionally, a large number of eggs have been stored and transported or stored in a safe and reliable manner. In such an application, a convex portion which rises upward at regular intervals in the vertical and horizontal directions of a generally rectangular egg tray is formed, and a portion surrounded by the four convex portions is for inserting an egg. The uppermost part of the upwardly protruding convex part and the lowermost part of the concave part are formed as flat end faces, and when the egg trays are horizontally rotated by 180 degrees and overlap each other, the upwardly protruding convexities are formed. It has been customary to use an egg tray in which the flat end face at the top of the section and the flat end face at the bottom of the recess abut against each other to form a space for individually storing eggs.

[0003] Also, it has been practiced to use a prefabricated cardboard box and stack a large number of eggs in multiple stages into a package using a plurality of the egg trays in the assembled cardboard box.

[0004]

However, since the conventional egg tray is a pulp molded product obtained by molding pulp, it easily absorbs water, and if the water is absorbed, Salmonella may be propagated. In particular, there is a risk of breeding violently when an egg is broken, and it has been pointed out as a hygiene problem that the egg is brought into a cooking place while being packed in an egg tray. Similarly, since the conventional cardboard box of the conventional type is made of paper, if water is absorbed, Salmonella may grow. was there.

[0005] In addition, since the egg tray made of pulp mold cannot be automatically supplied to the egg automatic filling apparatus, there is a problem that the eggs must be supplied one by one by hand. That is, in the packaging of eggs, the eggs are automatically inserted into the recesses of the egg tray supplied to the belt conveyor of the automatic egg filling apparatus, and the egg tray filled with eggs is placed in an assembled cardboard box. It is automatically stacked in multiple stages and packed to make a package of eggs. However, in order to automatically supply the egg tray to the belt conveyor,
It must be possible to prevent the stacked trays from sticking to each other and to be able to suck up one by one using a vacuum. However, since the egg tray made of a pulp mold is made of pulp, it cannot be sucked up using a vacuum, so that it cannot be automatically supplied to a belt conveyor of an automatic egg filling apparatus.

Another method for automatically supplying trays to an automatic egg filling apparatus is to drop only the lowest tray in a stacked state. For that purpose, it is necessary to prevent the stacked trays from coming into close contact with each other. In order to achieve this object, it is conceivable to provide a convex stopper in the flange portion for restricting the fitting in the egg tray made of pulp mold. However, since the material of the pulp mold egg tray is soft, it is difficult to prevent bites between the stacked trays by this method, and only the lowermost tray in the stacked state cannot be dropped.

[0007] On the other hand, egg trays made of synthetic resin sheets have been proposed and used. If an egg tray made of the synthetic resin sheet is used, it does not absorb water, so that propagation of Salmonella can be prevented. In addition, since it can be sucked up using a vacuum, it can be automatically supplied to the belt conveyor of the automatic egg filling apparatus.

However, as described above, in order to automatically and efficiently supply trays to the belt conveyor of the automatic egg filling apparatus, the trays must not be in close contact with each other when they are stacked. In a conventional tray made of a synthetic resin sheet, a tray in which convex stoppers are provided at different positions is prepared, and the trays having different structures are alternately stacked to prevent the trays from sticking to each other. Was out.

However, this method has a problem in that the trays cannot be prevented from sticking to each other in an application in which the used trays are collected and used repeatedly (returnable use). That is, during the thermoforming of the trays, by alternately stacking trays having partially different structures by rationally configuring the production line, it is possible to prevent the trays from sticking to each other at the first use. Can do it.

However, when the used trays are collected and reused, those having the same structure are frequently stacked and returned in a state of being in close contact with each other. Since the trays in such a state are in close contact with each other in the stacked state, it takes time to clean and sterilize. Further, when the trays are arbitrarily stacked after the work, the trays having the same structure are also stacked and adhered to each other. It became a state. Therefore,
In order to automatically supply the eggs to the automatic filling machine, the trays must be manually separated one by one and passed through the automatic egg filling machine, so they cannot be used for returnable applications for automatic egg filling machines. Was.

[0011] The present invention provides a returnable egg tray suitable for an automatic egg filling apparatus, which can easily prevent the occurrence of Salmonella bacteria and does not adhere to each other even in a state of being randomly stacked and collected. The purpose is to: Another object of the present invention is to provide an egg package comprising the egg tray and an assembled box-shaped container, which can easily prevent the generation of Salmonella and can be used in a returnable manner.

[0012]

That is, the present invention provides (1)
An egg tray made of a synthetic resin sheet, in which a large number of egg storage recesses are arranged, wherein an egg-shaped tray having an inverted tapered projection formed on an upper surface of the egg tray.
(2) An egg tray made of a synthetic resin sheet, in which a large number of egg storage recesses are arranged, wherein a depressed portion having a rising portion therein is formed in a connection portion between the egg storage recesses. An egg tray comprising (3) a synthetic resin sheet, in which a number of egg storage recesses are arranged, wherein an inverted tapered projection is formed on an upper surface of the egg tray, and the egg tray is stored. An egg tray characterized in that a concave portion having a rising portion is formed in a connecting portion between the concave portion and the egg storage concave portion. (4) At regular intervals in the vertical and horizontal directions of the egg tray. A convex part that rises upward is formed,
A portion surrounded by the four convex portions is formed as an egg storage concave portion, and the uppermost portion of the upwardly protruding convex portion and the lowermost portion of the egg storage concave portion are each formed as a flat end surface, and the egg trays are horizontally aligned with each other. When it is rotated and stacked, the uppermost flat end surface of the upwardly protruding convex portion and the back side of the lowermost flat end surface of the egg storage concave portion abut against each other to form a space for individually storing eggs. In any one of the above (1) to (3), at least one of the protrusions formed and rising further upward, the uppermost part of the protrusion is formed as a reverse tapered protrusion. Egg tray, (5)
The egg tray according to any one of (1) to (4), wherein at least one rib is provided on a side wall of the egg storage recess, (6) an outer shape of the egg tray is rectangular. When the egg trays are horizontally rotated by 180 degrees and stacked one on another, the uppermost flat end surface of the upwardly protruding projection and the back side of the lowermost flat end surface of the concave portion abut against each other. The egg tray according to the above (4), (7)
When the outer peripheral shape of the egg tray is square, and the egg trays are rotated 90 degrees or 180 degrees horizontally and stacked on each other,
(8) The egg tray according to (4), wherein the uppermost flat end surface of the convex portion rising upward and the back side of the lowermost flat end surface of the concave portion abut against each other. Is an inorganic filler-containing polypropylene-based resin sheet, wherein the egg tray according to any one of (1) to (7), (9) the egg according to any one of (1) to (8). Returnable egg tray for automatic filling equipment,
(10) An egg package in which eggs are stacked in multiple stages using a plurality of the egg trays according to any of (1) to (9) inside the assembled box-shaped container, The gist of the invention is characterized in that the box-type container is made of a plate-like or sheet-like foam made of a polypropylene-based resin.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The egg tray of the present invention is made of a synthetic resin sheet. Therefore, since the egg tray of the present invention does not absorb much moisture as compared with the paper product, the propagation of Salmonella can be easily prevented. In addition, since it can be sucked up by a vacuum, it can be automatically supplied to the automatic egg filling apparatus. In addition, if it is washed and sterilized, it can be used repeatedly, so that the cost can be reduced.

The synthetic resin constituting the synthetic resin sheet of the present invention includes, for example, polyester resins, in particular, amorphous or non-crystalline polyester resins, polycarbonate resins, polystyrene resins, and polypropylene resins. Sheets made of these resins are preferable as synthetic resins used in the present invention because they can be thermoformed and have excellent rigidity.

Among the above resins, polypropylene resins are preferred because they are easily thermoformed, have excellent heat resistance and oil resistance for washing and sterilization, and have excellent rigidity for storing and holding eggs. It is more preferable to use an inorganic filler, and if the inorganic filler is contained, the rigidity of the egg tray is improved. Therefore, it is further preferable to use an inorganic filler-containing polypropylene resin sheet.

The propylene resin constituting the inorganic filler-containing polypropylene resin sheet may be any of a homopolymer, a block copolymer, and a random copolymer. In the present invention, the synthetic resin sheet constituting the egg tray is not limited to the non-foamed resin sheet, but may be a foamed resin sheet.

It is preferable that the inorganic filler-containing polypropylene resin sheet contains 5 to 80% by weight, preferably 15 to 60% by weight of the inorganic filler based on the total weight. When the content of the inorganic filler is less than 5% by weight, the effect of improving the rigidity is poor, and when it exceeds 80% by weight, the thermoformability may be adversely affected. Examples of the inorganic filler include talc, silica, calcium carbonate, clay, zeolite, alumina, barium sulfate, and glass.

In the present invention, the synthetic resin sheet is usually composed of a single layer. However, the synthetic resin sheet may have a multilayer structure in consideration of the reuse of recycled materials, the change in the color of the front and back surfaces, and the like. In addition, by forming a multilayer sheet in which each layer is made of a different synthetic resin, functionality can be added.

The thickness of the egg tray of the present invention is 200 to 12
00 μm, preferably 300 to 1100 μm
Is more preferable, and it is still more preferable that it is 450-1000 micrometers. If the thickness is less than 200 μm, the shape retention and rigidity are poor, and if it exceeds 1200 μm, the production cost may be high. In the present invention, when the above-mentioned inorganic filler is contained in the egg tray, sufficient rigidity can be obtained even when the thickness is small.

In addition, the thickness of the egg tray is a thickness excluding a portion, such as a corner of a concave portion, which is partially thinned and stretched by thermoforming.

The egg tray (hereinafter referred to as a tray) of the present invention is a tray 1 in which a large number of egg storage recesses 3 are arranged and connected by a connecting portion 6, as shown in FIGS. Therefore, by inserting the egg into the concave portion 3, the egg can be transported or stored safely and reliably. 1 is a plan view of the tray of the present invention, and FIG. 2 is a longitudinal sectional view taken along the line II-II in FIG.

In the tray 1 of the present invention, an inversely tapered projection 2 is formed on the upper surface of the tray 1. When the protrusions 2 are formed, when the trays 1 are stacked, as shown in FIG. 3, the front side of the upper end surface 4 of the protrusion 2 of the lower tray 1 and the protrusion 2 of the upper tray 1 are provided. The tray 1 does not come into close contact with each other because the back side of the upper surface 5a of the portion in contact with the tray abuts. Therefore, even when the collected and used ones are randomly stacked, the upper and lower trays do not adhere to each other in the stacked state, and only the lowermost tray is used. Since it can be easily dropped and the top tray can be sucked up, it is suitable as a returnable tray for automatic supply of an automatic egg filling apparatus. FIG. 3 is a cross-sectional view (excluding ribs 33) for explaining an aspect around the protrusion when the trays 1 having the protrusions 2 having the cross-sectional shape shown in FIG.
Is not shown. ).

In the present invention, as shown in FIG. 2, the upper surface 5a of the tray 1 where the protrusion 2 is provided is lower than the upper surface 5b of the tray 1 where the protrusion 2 is not provided. It is preferable that the position of the upper end surface 4 of the projection 2 and the position of the upper surface 5b be the same height. With such a configuration, as will be described later, the trays 1 storing the eggs are favorably stabilized when rotated and stacked.

The outer peripheral shape of the tray 1 of the present invention is preferably rectangular or square. A tray having a rectangular or square outer shape is easy to handle, and as described later, it is easy to manufacture an assembled box-shaped container used for an egg package.

In the tray 1 of the present invention, as shown in FIGS. 1, 4 and 5, the egg storage recess 3 of the tray 1 and the connecting portion 6 between the egg storage recess 3 have a rising portion 8 inside. A depression 7 is formed. The recessed portion 7 is formed by thermoforming the connecting portion 6, and the rising portion 8 and the bottom portion 9 are formed by the connecting portion 6.
A part of. 4 is a longitudinal sectional view along the line IV-IV in FIG. 1, and FIG. 5 is a longitudinal sectional view of the depression 7 along the line VV in FIG. 4 (however, some ribs 33 are not shown). is there.

However, the shapes of the rising portion 8 and the bottom portion 9 inside the recessed portion 7 in the present invention are not limited to those shown in FIG. 5, but are, for example, shown in FIGS.
The shape shown in FIG.

When the depressions 7 are formed, when the trays 1 are stacked, as shown in FIG. 7, the upper end of the rising portion 8 and the back side of the bottom 9 of the depression 7 come into contact with each other. Since the upper and lower trays do not adhere to each other in the stacked state, only the bottom tray can be easily dropped, and the top tray can be sucked up. It is suitable as a simple tray. 7 is a cross-sectional view (however, the ribs 33 are not shown) for explaining an aspect near the depression when the trays 1 having the depressions having the cross-sectional shape shown in FIG. 4 are stacked.

It is preferable that the tray 1 of the present invention is provided with both the inversely tapered projection 2 of the embodiment shown in FIG. 2 and the depression 7 of the embodiment shown in FIG. However, if either the projection 2 or the depression 7 is provided, it is possible to prevent the upper and lower trays from being in close contact with each other in the stacked state.

One preferred embodiment of the tray of the present invention is shown in FIGS. In the tray 21 of the embodiment shown in FIG. 8, the protrusions 22 (hereinafter, referred to as protrusions 22) that rise upward at uniform intervals in the vertical and horizontal directions of the tray.
Is formed, and a portion surrounded by the four convex portions 22 is formed as a concave portion 3 for accommodating an egg.
Therefore, by storing the eggs in the recesses 3, the eggs can be transported or stored safely and reliably. FIG. 8 is a plan view showing an example of a preferred embodiment of the tray of the present invention.
FIG. 10 is a vertical sectional view taken along line XX of FIG. 8.

In the tray 21 of the embodiment shown in FIG.
As shown in FIG. 10, the uppermost part of the convex part 22 and the lowermost part of the concave part 3 are formed as flat end faces 24 and 25, respectively.
When the trays are rotated horizontally and stacked on each other, FIG.
As shown in the figure, the front side of the uppermost flat end surface 24 of the convex portion 22 of the lower tray (the upper end surface 4 in the case of the convex portion 22b described later) and the lowermost flat end surface of the concave portion 3 of the upper tray. The back side of 25 abuts each other to form a space for individually storing eggs 26. By stacking the trays 21 in this way, eggs can be packaged in multiple stages. FIG. 11 is a partially cutaway front view showing the state where two trays 21 shown in FIG. 8 are stacked and eggs are packaged (however, ribs 33 are not shown).

As described above, when the trays 21 are overlapped by being rotated 90 degrees or 180 degrees horizontally with each other, the top side of the uppermost flat end face 24 of the projection 22 of the lower tray and the recess of the upper tray. In order to make the rear side of the lowermost flat end face 25 abut against each other, for example, as shown in FIG. 8, only the concave portions 3 in a row along two adjacent side sides B and C are required. What is necessary is just to take the form which lacked the half part of the side facing the side sides B and C. The same applies to the egg tray 1 of the embodiment shown in FIG.

When the outer peripheral shape of the tray 21 is rectangular,
When the trays 21 are stacked one on the other by rotating them 180 degrees horizontally, the flat end face 24 at the top of the projections 22 of the lower tray
And the flat end face 2 at the bottom of the recess 3 of the upper tray
The back sides of the five abut against each other to form a space for individually storing the eggs 26. When the outer peripheral shape of the tray 21 is a square, the trays 21 are 90 degrees or 180
When rotated one degree, the upper side of the uppermost flat end face 24 of the convex portion 22 of the lower tray and the lower side of the lowermost flat end face 25 of the concave portion 3 of the upper tray abut against each other, and eggs 2
6 are formed to individually accommodate the space portions.

In the tray 21 of the present invention, at least one of the protrusions 22b of the protrusions 22 has the uppermost part of the protrusion 22b as shown in FIGS. 9 (a) and 9 (b). It is formed as. When the projections 2 are provided, even if the trays 21 are stacked without rotating horizontally, the projections 2 of the upper end surface 4 of the projections 2 of the lower tray 21 and the projections 2 of the upper tray 21 are provided. The tray 21 does not come into close contact with each other because the portion of the upper surface 27 where the is provided abuts against the back side of the upper surface 27. Therefore, even if the collected used trays 21 are randomly stacked, the upper and lower trays do not adhere to each other in the stacked state, and only the lowermost tray can be easily dropped. Since the upper tray can be sucked up, it is suitable as a returnable tray for automatic supply of an automatic egg filling apparatus. 9A is an enlarged plan view of a portion A in FIG. 8, and FIG. 9B is a longitudinal sectional view along line IX-IX in FIG.

The number of the projections 22b whose uppermost portions are formed as the projections 2 is not limited, but is usually 4 to 20 and at least one projection is provided for each recess 3 as shown in FIG. It is preferable to configure so that 22b is arranged. With this configuration, it is possible to easily prevent the trays 21 from sticking to each other.

In the tray 21 of the embodiment shown in FIG.
As shown in FIG. 10, the connecting portion 6 between the concave portions 3 is preferably formed in a concave shape, and the concave shape is not limited to a curved vertical cross section, but includes a broken linear cross section.

In the tray 21 of the embodiment shown in FIG.
It is preferable that the connecting portion 6 be provided with the depression 7. When the depressions 7 are provided, when the trays 21 are stacked without rotating horizontally, as shown in FIG. 12, the upper ends of the rising portions 8 of the lower tray 21 and the depressions of the upper tray 21 are provided. Since the back side of the bottom portion 9 of the tray 7 is in contact with the tray 9, the trays 21 can be more reliably prevented from sticking to each other. In order to effectively prevent the trays 21 from sticking to each other, it is preferable to provide the recessed portion 7 at the lowest position of the concave connecting portion 6. FIG. 12 is a cross-sectional view (not shown for illustrating the ribs 33) illustrating a state near the depression when the trays 21 having the depressions having the cross-sectional shape shown in FIG. 10 are stacked.

In the trays 1 and 21 of the present invention, as shown in FIGS. 8 and 10, it is preferable that at least one rib 33 is provided on the side wall of the concave portion 3 for inserting an egg. When the ribs 33 are provided, the tray 1 can be prevented from being twisted by the weight of the egg.

In the tray of the present invention, FIGS.
It is preferable that a folded portion 32 is provided on the outer peripheral edge as shown in FIG. When the folded portion 32 is provided, the bending strength of the tray is improved, and the hand of the operator can be prevented from being damaged.

Further, in the egg tray of the present invention, as shown in FIGS. 8 and 10, it is preferable that a hole for discharging water is provided on the bottom surface of the concave portion 3 after the tray 21 is washed. The hole 34 preferably has a diameter in the range of 1.5 to 8.0 mm.

As described above, the tray of the present invention
Even if the collected used items are randomly stacked, the trays do not stick together,
It is suitable as a returnable tray for an automatic egg filling device.

The egg package of the present invention is an egg package in which eggs are stacked in multiple stages using a plurality of the trays 1, 21 and the like described above inside the assembled box-shaped container.
A large number of eggs can be stored and transported or stored safely and reliably.

The assembled box-shaped container (hereinafter, referred to as a box-shaped container) is made of a plate-shaped or sheet-shaped foam made of a polypropylene-based resin (hereinafter, referred to as a polypropylene-based resin foam). Therefore, the box-shaped container of the present invention
It is excellent in mechanical strength, rigidity, etc. and has heat retention and cold retention. In addition, it can be washed with water and the like, and can be recovered and used repeatedly, so that it is rich in economy. Furthermore, since it does not absorb moisture and there is no risk of Salmonella breeding, it can be brought to a cooking place.

Examples of the polypropylene resin constituting the polypropylene resin foam include a propylene homopolymer and a copolymer of propylene with another α-olefin copolymerizable with propylene, for example, propylene-ethylene random copolymer. Coalesce, a propylene-ethylene block copolymer, a propylene-butene copolymer, a propylene-ethylene-butene terpolymer, a propylene-acrylic acid copolymer, and the like. preferable.

The polypropylene resin foam is usually
Can be produced by the extrusion foaming method. Of the foam
Apparent density is lightweight and has sufficient strength
In that respect, 0.07 to 0.30 g / cm³Is preferred,
0.11 to 0.25 g / cm ³Is more preferred.

The thickness of the polypropylene resin foam is usually 2 mm to 10 mm, preferably 3 mm to 6 mm, and more preferably 4 mm to 5 mm in consideration of mechanical strength and rigidity.
Is particularly preferred.

When the box-shaped container used in the present invention is constituted by using a polypropylene resin foam laminate in which a solid layer made of a polypropylene resin is laminated on both surfaces of the polypropylene resin foam, excellent strength and appearance are obtained. It will be.

Examples of the resin used for the solid layer include the same resins as those used for the foam. However, from the viewpoints of recyclability, adhesiveness, oil resistance, rigidity, etc., the resin constituting the foam may be used. Preferably they are the same. The solid layer preferably has a multilayer structure in which a plurality of layers are stacked. When such a configuration is adopted, for example, by using the recovered raw material for the intermediate layer, the recovered raw material can be effectively used, and the cost can be reduced.

The solid layer can be provided, for example, by a co-extrusion method at the time of production of the polypropylene resin foam, and after the production of the polypropylene resin foam, the polypropylene resin sheet is heat-sealed or using an adhesive. It can be provided by a laminating method or the like.

As shown in FIG. 13, the box-shaped container 41 used in the present invention has openings at the top and bottom, and a plurality of closed surfaces (flaps) 42 are formed on the side surfaces 4 of the box-shaped container 41.
3, the closed surface 42 is configured to be folded and overlapped when the box-shaped container is assembled, thereby forming the bottom and / or the lid of the box-shaped container 41. Is preferred. Such a box-shaped container 4
1 is easy to assemble, open, and unfold, does not break when opened, and can easily stack eggs in multiple stages by using a plurality of the trays of the present invention inside.

As a means for fixing the bottom and / or the lid of the box-shaped container 41, a closed surface (flap) can be overlapped and fixed with an adhesive tape, a staple or the like, or a flexible fastener as shown in FIG. The closed surface (flap) can be overlapped and fixed by arranging the universal fasteners and arranging the universal fasteners with each other.

[0051]

The tray according to the present invention has the following excellent effects by adopting the above-mentioned structure.

Since the tray of the present invention is made of a synthetic resin sheet, it does not absorb moisture and can easily prevent the propagation of Salmonella. In addition, since it can be sucked up by a vacuum, it can be automatically supplied to the automatic egg filling apparatus. Furthermore, if it is washed and sterilized, it can be used repeatedly.

When a non-crosslinked propylene resin sheet is used as the synthetic resin sheet, excellent recyclability, washability, sterilization, rigidity and the like are obtained.

The egg tray of the present invention is different from the above because an inverted tapered projection is formed on the upper surface thereof and / or a recessed portion having a rising portion is formed in a connecting portion between the egg storage recess and the egg storage recess. Even if you do not use multiple types of trays with stoppers at the position, it is possible to prevent the trays from sticking together when stacked by one type of tray. Even if there is, the trays do not adhere to each other. This makes it possible to manufacture a tray in which adhesion during stacking can be prevented with a single mold, and has a great effect on manufacturing costs such as mold preparation costs.

In the egg tray of the present invention, convex portions rising above the specific structure are formed at uniform intervals in the vertical and horizontal directions, and the portion surrounded by the four convex portions is the specific structure. When the egg tray is formed as an egg storage recess and the egg trays are rotated horizontally and overlapped, the specific portion of the projection and the specific portion of the egg storage recess abut against each other to form a space for individually storing the eggs. By adopting a configuration in which at least one of the protruding portions rising upward, the uppermost portion of the protruding portion is formed as a reverse-tapered projection, the eggs are well stored and the used waste collected. Even if the trays are randomly stacked, the trays do not adhere to each other. .

As described above, the tray of the present invention can be stacked compactly and is easy to handle. Even if the trays are randomly stacked after collection and washing, the trays do not adhere to each other. It is suitable as a returnable egg tray used for the purpose of automatically supplying to an automatic filling device.

The assembled box type container used in the egg package of the present invention is made of a polypropylene resin foam,
It is excellent in mechanical strength, rigidity, etc. and has heat retention and cold retention. In addition, it is possible to perform washing such as washing with water, and it is possible to collect and use it repeatedly.
Furthermore, since it does not absorb moisture and there is no risk of Salmonella breeding, it can be brought to a cooking place.

In the egg package of the present invention, eggs are stacked in multiple stages by using a plurality of trays inside the assembled box-shaped container. Therefore, assembling, opening, and deployment are easy, and eggs can be easily stacked in multiple stages.

[Brief description of the drawings]

FIG. 1 is a plan view of a tray according to the present invention.

FIG. 2 is a longitudinal sectional view taken along the line II-II in FIG.

FIG. 3 is a cross-sectional view illustrating an aspect around a protrusion when stacking trays having protrusions having a cross-sectional shape illustrated in FIG. 2;

FIG. 4 is a longitudinal sectional view taken along the line IV-IV in FIG. 1;

FIG. 5 is a longitudinal sectional view of the depression 7 along the line VV in FIG. 4;

FIGS. 6A to 6C are longitudinal sectional views of a depression 7 showing another example of a shape of a rising portion 8 and a bottom portion 9;

7 is a tray 1 having a depression having a cross-sectional shape shown in FIG.
FIG. 9 is a cross-sectional view for explaining a mode in the vicinity of a depressed portion in a case where are stacked.

FIG. 8 is a plan view showing an example of a preferred embodiment of the tray of the present invention.

9A is an enlarged plan view of a portion A in FIG.
(B) is a longitudinal sectional view along line IX-IX of FIG. 9 (a).

FIG. 10 is a longitudinal sectional view taken along line XX of FIG. 8;

11 is a partially cutaway front view showing a state in which two trays of the embodiment shown in FIG. 8 are stacked and eggs are wrapped.

12 is a cross-sectional view illustrating an aspect near the depression when the trays 21 having the depression having the cross-sectional shape illustrated in FIG. 10 are stacked.

FIG. 13 is a perspective view of an assembled box-shaped container used in the egg package of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 tray 2 inverted tapered protrusion 3 egg storage recess 4 upper end surface of protrusion 2 5a upper surface of tray 1 where protrusion 2 is provided 5b upper surface of tray 1 where protrusion 2 is not provided 6 egg storage recess Connection part 3 and egg storage concave part 3 7 Depressed part 8 Rise part 21 Tray 22 Convex part 22b rising upwards Protruded part 22b The uppermost part is formed as protrusion 2 25 Flat end face of lowermost part of concave part 26 Egg 33 rib 34 hole 41 box type container

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshiharu Kanazawa 2-16-7 Nihonbashi Kakigara-cho, Chuo-ku, Tokyo Inside Sanko Foods Co., Ltd. (72) Inventor Hiroo Sato 2-chome, Nihonbashi Kakigara-cho, Chuo-ku, Tokyo No. 16-7 F-term in Sanko Foods Co., Ltd. (reference) 3E006 AA01 BA01 CA01 DA03 DB05 FA10 3E096 AA09 AA14 BA26 BB09 CA02 CA06 DA23 DC01 EA02 EA03 FA08 FA16 FA31 GA01

Claims (10)

[Claims] 1. An egg tray comprising a synthetic resin sheet and having a large number of egg storage recesses arranged thereon, wherein an egg-shaped tray having an inverted tapered projection formed on an upper surface of the egg tray. 2. An egg tray comprising a synthetic resin sheet and having a large number of egg storage recesses arranged therein, wherein a connecting portion between the egg storage recesses and the egg storage recess has a recessed portion having a rising portion therein. An egg tray characterized by being. 3. An egg tray comprising a synthetic resin sheet and having a number of egg storage recesses arranged therein, wherein an inverted tapered projection is formed on the upper surface of the egg tray, and the egg storage recess and the egg storage recess are formed. An egg tray, wherein a depressed portion having a rising portion is formed in a connecting portion of the egg tray. 4. A projection which rises upward at uniform intervals in the vertical and horizontal directions is formed, and a portion surrounded by the four projections is formed as an egg storage recess, and rises upward. The uppermost part of the convex part and the lowermost part of the egg storage concave part are formed as flat end faces, respectively, and when the egg trays are horizontally rotated and overlapped with each other, the uppermost flat end face of the convex part rising upward and the egg A space portion for individually storing eggs is formed by abutment with the back side of the lowermost flat end surface of the storage concave portion, and at least one of the convex portions rising upward, the uppermost portion of the convex portion is inverted. The egg tray according to any one of claims 1 to 3, wherein the egg tray is formed as a tapered projection. 5. The egg tray according to claim 1, wherein at least one rib is provided on a side wall of the egg storage recess. 6. The egg tray has a rectangular outer peripheral shape, and when the egg trays are rotated horizontally by 180 degrees and stacked one upon the other, the uppermost flat end surface of the upwardly protruding convex portion and the lowermost portion of the concave portion are formed. 5. The egg tray according to claim 4, wherein the rear side of the flat end face abuts against each other. 7. When the egg tray has a square outer periphery and the egg trays are rotated 90 degrees or 180 degrees horizontally and stacked one upon the other, the uppermost flat end face of the upwardly protruding convex portion and the concave portion of the concave portion are formed. 5. The egg tray according to claim 4, wherein the bottom of the lowermost flat end surface abuts against each other. 8. The resin sheet according to claim 1, wherein the synthetic resin sheet is a polypropylene resin sheet containing an inorganic filler.
An egg tray according to any one of claims 1 to 7. 9. A returnable egg tray for an automatic egg filling apparatus according to claim 1. 10. An egg package in which eggs are stacked in multiple stages using a plurality of the egg trays according to any one of claims 1 to 9, inside an assembled box-shaped container.
An egg package, wherein the assembled box-shaped container is made of a plate-like or sheet-like foam made of a polypropylene resin.