JP2014207954A - Food package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a food package from which a food material can easily be taken out.SOLUTION: A food package includes: a first wall surface part 10 surrounding the bottom surface of a hollow part, receiving a load of a food material, and capable of being curved protrudingly downward; a second wall surface part 11 surrounding the top surface of the hollow part, and capable of being curved protrudingly upward; first and second flaps 12 and 13 provided on the first wall surface part 10, foldable by first and second folding lines 20 and 21, and surrounding the right and left side surfaces of the hollow part; and third and fourth flaps 14 and 15 provided on the second wall surface part 11, foldable by third and fourth folding lines 22 and 23, and surrounding the right and left side surfaces of the hollow part. The front end sides of the first wall surface part 10 and the second wall surface part 11 can be connected each other by folding the first wall surface part and a fifth folding line 24 formed on the rear end side of the second wall surface part. A pinched part 25 integrally provided on the front end side of the second wall surface part 11 is formed so as to be pinched between the placing surface of the first wall surface part 10 and the first wall surface part 10 by folding the pinched part 25 to the lower surface side of the first wall surface part 10.

Description

  The present invention relates to a food packaging body, and more particularly to a food packaging body in which a food material is stored and can be heated by a microwave.

2. Description of the Related Art Conventionally, food packaging bodies that can be steamed and cooked by storing foods inside and heating them with microwaves have been put into practical use. Patent Document 1 is an airtight food package previously proposed by the inventor of the present application, and contains food such as fish, meat, and vegetables inside, and a sheet-shaped heating element on the bottom upper side under the food. In addition to cooking by sticking, baking cooking that gives a crispy feeling or creases is also possible. This package has a horizontally long pillow shape with a bottom surface that is convexly curved downward and a top surface that is convexly convex upward, and a vertical section perpendicular to the horizontal axis in the horizontal direction is substantially spindle-shaped. Is formed. The bottom surface and the top surface are integrated by adhering an edge extending to the left and right on the near side and an edge extending to the left and right on the far side. A substantially spindle-shaped end surface portion (flap) is integrally provided at each left end portion of the bottom surface portion and the top surface portion, and is bent perpendicularly from the bottom surface portion and the top surface portion to be overlapped with each other and glued. Similarly, a substantially spindle-shaped end surface portion (flap) is integrally provided at each right end portion of the bottom surface portion and the top surface portion, and is bent vertically from the bottom surface portion and the top surface portion so as to overlap each other. Gas can enter and exit the inside and outside of the package through the overlapped end surface portions.
When a food package containing foodstuffs on a heating element is placed in a microwave oven and microwaves are applied, the foodstuff is heated and the water vapor emitted from the inside flows back to the foodstuff along the curvature of the bottom and top surfaces, Steamed cooking can be done smoothly because the ingredients are wrapped in a steam atmosphere. At the same time, the heating element generates heat with microwaves, and the bottom surface of the food is heated to create a grill, so that baking can be performed together with steaming.

  By the way, in the food packaging body described above, the food material before cooking is opened inside the side lid, and the opening is narrow and the food material is difficult to put in. In addition, after cooking, the tear line formed on the top surface portion was broken to open and food was taken out, and the opening operation was cumbersome and could not be done quickly and easily. In addition, a part of the water vapor generated from the ingredients during cooking leaks to the outside from between the inner lid and the outer lid where the end face portions are overlapped. If you try to cook while containing heavy ingredients, a large amount of steam is generated from the ingredients, and a large internal pressure is applied to the inner and outer lids to open the outside, causing steam to escape and make it impossible to cook with steam. It was.

JP 2013-60233 A

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a food package in which food can be easily taken out. It is another object of the present invention to provide a food package that can be cooked well even if it contains heavy foods and is cooked with microwaves.

According to the first aspect of the present invention, the food packaging body is capable of forming a hollow portion for containing the food material therein, and can be bent downward and surrounds the bottom surface side of the hollow portion and receives the load of the food material. A wall surface portion, a second wall surface portion that can be convexly convex and surrounds the top surface side of the hollow portion, and a first wall surface that is integrally provided on both left and right sides of the first wall surface portion, The first and second flaps that can be bent by the second fold line and surround the left and right side surfaces of the hollow portion, and the first and second flaps that are integrally provided on the left and right side edges of the second wall surface portion are formed at the boundary. 3. A third flap and a fourth flap that can be bent by a fourth fold line and surround the left and right side surfaces of the hollow portion, and have a rear side edge and a second wall surface portion of the first wall surface portion. The rear edge is integrated and the boundary forms a fifth fold line. The front side edge of the first wall surface part and the front side edge side of the second wall surface part can be joined or approached by bending at the front side edge of the second wall surface part. Provided, the boundary forms a sixth fold line, and the sandwiched portion is formed by the sixth fold line in a state where the front side edge of the second wall surface part is joined or approached to the front side edge of the first wall surface part. It is characterized in that it is formed so as to be sandwiched between the placement surface of the first wall surface portion and the first wall surface portion by being bent toward the lower surface side of the first wall surface portion.
The invention according to claim 2 is a food packaging body capable of forming a hollow portion for containing a food, and has four front and rear, right and left sides, and can be bent downward and protruded downward. A first wall surface portion that surrounds the side and receives a load of foodstuffs, a second wall surface portion that has four front and rear, left and right edges, can be curved upward, and surrounds the top surface side of the hollow portion; A first flap and a second flap that are integrally provided on the left and right side edges of the wall portion of the wall portion and can be bent vertically by first and second folding lines formed at the boundary and surround the left and right side surfaces of the hollow portion. And a third flap that is integrally provided at the left and right ends of the second wall portion and that can be bent vertically by third and fourth fold lines and that surrounds the left and right side surfaces of the hollow portion; A fourth flap, and the rear side edge of the first wall surface portion and the rear side edge of the second wall surface portion are one. And the boundary forms a fifth fold line, and the front side edge of the first wall surface part and the front side edge of the second wall surface part can be joined or approached by folding along the fifth fold line. The sandwiched portion is integrally provided on the front side edge of the second wall surface portion, the boundary forms the sixth fold line, and the sandwiched portion has the front side edge of the second wall surface portion at the first side edge. In the state where it is joined or approached to the front side edge of the first wall surface portion, it is bent to the lower surface side of the first wall surface portion by the sixth fold line, so that the mounting surface of the first wall surface portion and the first wall surface portion The first flap and the second flap are bent perpendicular to the first wall surface portion, and the third flap and the fourth flap are perpendicular to the second wall surface portion. Bend, the front edge of the second wall will join or approach the front edge of the first wall When folded at the fifth fold line, the first flap and the third flap overlap, and at this time, the edge of the inner flap joins to the fold line of the outer flap, and the second flap and the fourth flap. In this case, the inner flaps are formed so that the edge of the inner flap is joined to the fold line of the outer flap.
In the invention of claim 3, a heating element having bending rigidity that can be stored in the hollow portion of the package body with the foodstuff placed thereon is provided, and when this heating element is stored in the hollow portion, a space is formed vertically. It is characterized in that the front and rear edges of the heating element are locked to the first wall surface portion, and the space above the heating element communicates with the outside of the left and right edges of the heating element.
In the invention according to claim 4, an extending portion is integrally provided on the front side edge of the first wall surface portion so that the boundary can be folded to the hollow portion side as a fold line, and the hollow portion can be stored in the hollow portion so that the hollow portion can be vertically moved. A tray divided into two stages is provided so that one end of the tray is locked to the extending portion and the other end on the opposite side is locked to the first wall surface near the fifth fold line. It is characterized by that.

According to the first aspect of the present invention, the food packaging body in the assembled state is lifted, the sandwiched portion integrated with the second wall surface portion is grasped with a finger, and the first wall surface portion is formed with the first fold line as an axis. The hollow part can be easily opened wide by separating it from the upper side. On the other hand, the sandwiched part is held with a finger and brought closer to the first wall surface with the first fold line as an axis, and the sixth fold line By bending the sandwiched portion to the lower surface side of the first wall surface portion, the hollow portion can be easily closed, and the food can be taken in and out quickly and easily.
Further, when the weight of the food increases, the force to push the sandwiched portion against the placing surface of the food packaging body via the first wall surface portion increases, and the sandwiched portion attempts to move open relative to the first wall surface portion. Since the frictional force of the product increases and it becomes difficult to open, a large amount of heated steam is generated from heavy ingredients, and even if the internal pressure of the hollow part increases, the opening is inadvertently generated and the steam escapes to the outside of the package No stable steaming cooking is possible.
According to invention of Claim 2, when the weight of a foodstuff increases, the force which the bending line of an outer side flap joins to the edge of an inner side flap among the 1st flap and the 3rd flap, and presses down. Similarly, it becomes difficult to open, and similarly, the bending force of the outer flap of the second flap and the fourth flap joins to the edge of the inner flap and presses downward to make it difficult to open. Therefore, even if a large amount of heated steam is generated from heavy ingredients and the internal pressure of the hollow part increases, the flap does not open carelessly and the steam does not escape to the outside of the package, making stable steaming possible Become.
In addition, according to the third invention, the heating element having bending rigidity that can be accommodated in the hollow portion of the food packaging body on which food is placed is provided, and the front and rear ends of the heating element are formed so that a space is formed above and below the heating element. The heat generated by microwaves is formed so as to be locked to the first wall surface at the side and so that the lower and upper spaces of the heating element communicate with each other outside the left and right edges of the heating element. The body can bake and cook the food, and the water vapor emitted from the food heated by the absorption of microwaves rises from the food in the space above the heating element and then flows down around the food. By returning to the surroundings of the upper food again through the space below the heating element, the surroundings of the food are uniformly wrapped in water vapor and heated, and steam cooking can be performed smoothly.
Further, according to the fourth invention, the extending portion is provided integrally on the front end side of the first wall surface portion, and the boundary can be bent to the hollow portion side as a folding line and can be stored in the hollow portion. One end of the tray that divides the upper and lower stages is locked to the extended portion, and the other end on the opposite side is locked to the first wall surface near the fifth fold line Thus, different foods can be cooked in the microwave at the same time on the lower side and the upper side of the tray. And even if the weight of the food on the upper side of the tray is heavy, one end of the tray is locked by the extending portion, so that the food can be placed in the lower space without lowering the tray and narrowing the lower space. The heating element can be accommodated for baking, or simultaneous baking and steaming can be performed.

It is an expanded view of the food packaging body which concerns on 1st Example of this invention (Example 1). It is a top view of the assembly state of the food packaging body of FIG. It is a front view of the food packaging body of FIG. It is a left view of the food packaging body of FIG. It is a longitudinal cross-sectional view of the food packaging body along the V-V 'line of FIG. It is a longitudinal cross-sectional view of the food packaging body along the VI-VI 'line of FIG. It is a top view of a heat generating body. It is a longitudinal cross-sectional view of the heat generating body along the VIII-VIII 'line of FIG. It is explanatory drawing of the assembly method of a food packaging body. It is explanatory drawing of the assembly method of a food packaging body. It is explanatory drawing of the assembly method of a food packaging body. (Example 2) which is the partially broken longitudinal cross-sectional view of the food packaging body in the assembly state which concerns on 2nd Example of this invention. It is a longitudinal cross-sectional view along the XIII-XIII 'line of FIG. FIG. 13 is a development view of the tray in FIG. 12.

  Hereinafter, the best mode of the present invention will be described based on examples.

A first embodiment of an assembling-type food packaging body according to the present invention will be described with reference to the drawings.
FIG. 1 is a development view of an assembling type food packaging body, FIG. 2 is a plan view of a state in which the food packaging body of FIG. 1 is assembled, and a heating element on which ingredients are placed is housed, FIG. 3 is a front view of FIG. 4 is a left side view of FIG. 2, FIG. 5 is a longitudinal sectional view taken along line VV ′ of FIG. 2, FIG. 6 is a longitudinal sectional view taken along line VI-VI ′ of FIG. FIG. 8 is a longitudinal sectional view taken along the line VIII-VIII ′ of FIG. 7, and FIGS. 9 to 11 are explanatory views of the assembly procedure of the food packaging body 1. is there.
The food packaging body 1 shown in FIG. 1 is bent along a folding line as will be described later, and a box-shaped container having a flat pillow shape (pillow case for packaging) as shown in FIGS. As shown in FIG. 5, a hollow portion 4 having a substantially spindle-shaped vertical cross section is formed. A heating element 5 on which the food material 3 is placed is accommodated in the hollow portion 4.

  Examples of the food 3 include any food that can be heat-treated, such as fish, meat, vegetables, cereals, or processed products thereof. Moreover, as the foodstuff 3, what combined with sauce and soup, and the thing from which oil and soup come out by heating may be used. In particular, a combination with a gel-like sauce or soup under chilled conditions or normal temperature is also preferred. Moreover, as the foodstuff 3, it is especially preferable that it is eaten by the cooking method which performs baking cooking and steaming cooking simultaneously. Examples of such food 3 include fresh foods such as fish, meat and vegetables, and semi-processed foods such as grilled rice balls, pickled fish, pickled meat and dried fish.

  The food package 1 shown in the development view of FIG. 1 is in the form of a single sheet, and viewed in the assembled state, front, rear, left and right (the lower part of FIG. 2 is the front, the upper part of FIG. 2 is the rear, the left part of FIG. The right side of 2 is the right (hereinafter the same), and the first part can be bent so that the cross section is convex downward so as to surround the bottom surface side which is the lower half of the hollow part 4. The wall surface 10 has four front and rear, right and left edges as seen in the assembled state, and can be bent so that the cross section is convex upward so as to surround the top surface side which is the upper half of the hollow portion 4. It is possible to bend vertically from the left and right end sides of the first wall surface portion 10 so as to be provided integrally with the left and right side surfaces of the second wall surface portion 11 and the first wall surface portion 10 and to surround the left and right side surfaces of the hollow portion 4. The substantially spindle-shaped first flap 12 and second flap 13, and the second side so as to surround the left and right side surfaces of the hollow portion 4. And a third flap 14 and the fourth flap 15 from the left and right end sides of the substantially spindle that can be bent perpendicularly in the surface portion 11.

  The first flap 12 to the fourth flap 15 have substantially the same shape in the unfolded state, and a semicircular cut portion 18 for hooking fingers is provided at the center of the outer edge curved portions 16 and 17 of the first and second flaps 12 and 13. , 19 are provided. First and second folding lines 20 and 21 are formed at the curved boundary between the first flap 12 and the second flap 13 and the first wall surface portion 10, and the third flap 14 and the second Third and fourth fold lines 22 and 23 are formed at the curved boundary between the four flaps 15 and the second wall surface portion 11. The first to fourth fold lines 20 to 23 are all valley-folded.

  The front side edge and the rear side edge of the first wall surface part 10 and the front side edge and the rear side edge of the second wall surface part 11 are all formed in a straight line. The two wall surface portions 11 have the same shape in the unfolded state. The rear side edge of the first wall surface part 10 and the rear side edge of the second wall surface part 11 are integrally formed, and a fifth fold line 24 is formed at the boundary. The fifth fold line 24 is valley-folded. When bent along the fifth fold line 24, the front side edge of the second wall surface portion 11 can be joined to the front side edge of the first wall surface portion 10, and at this time, the first and third flaps can be joined. The third fold line 22 is joined to the outer edge curved portion 16 of the first flap 12 that is overlapped with the inner portion when viewed from the hollow portion 4 and pressed downward, so that the first and third flaps 12 are overlapped. , 14 is prevented from opening (leftward in FIG. 5), and the left side surface of the hollow portion 4 is hermetically closed. Similarly, the second and fourth flaps 13 and 15 overlap each other, and the fourth fold line 23 is joined to the outer edge curved portion 17 of the second flap 13 which is overlapped inside as viewed from the hollow portion 4 and pressed downward. Then, the opening movement of the second and fourth flaps 13 and 15 (in the right direction in FIG. 5) is prevented, and the right side surface of the hollow portion 4 is hermetically closed.

  A sandwiched portion 25 is integrally provided at the front side edge of the second wall surface portion 11 along the front side edge, and a sixth fold line 26 is formed at the boundary. Further, an extended portion 27 is integrally provided along the front side edge on the front side edge of the first wall surface portion 10, and a seventh fold line 28 is formed at the boundary. The sandwiched portion 25 joins the front side edge of the second wall surface portion 11 to the front side edge of the first wall surface portion 10, and bends the extending portion 26 toward the hollow portion 4 so that the second wall surface portion 11 In a state of being joined along the lower surface of the front end portion, by wrapping the front side edge of the first wall surface portion 10 by the sixth fold line 26 and further bending along the lower surface side of the first wall surface portion 10, When assembling the food packaging body 1 and using it as a box-shaped container, the food packaging body 1 is sandwiched between a mounting surface (such as a microwave oven table or the like, symbol H in FIGS. 3 to 6) on which the first wall surface portion 10 is mounted. It is made possible. In a state where the foodstuff 3 is accommodated in the hollow portion 4 of the box-shaped container, the first wall surface portion 10 receiving the weight of the foodstuff 3 presses the sandwiched portion 25 against the placement surface H, and the first wall surface portion 10 and the covered material portion are covered. The opening movement of the sandwiched portion 25 is prevented by the frictional force that acts between the sandwiched portion 25 and between the sandwiched portion 25 and the placement surface H. Accordingly, the bottom surface and the top surface of the hollow portion 4 are hermetically closed.

  The assembled food packaging body 1 is formed by joining the outer bent portion 16 of the first flap 12 and the third bent line 22, and the outer bent portion 17 of the second flap 13 and the fourth bent line 23. In addition to the location, air enters and exits between the hollow portion 4 and the outside in the vicinity of the joint portion of the sixth fold line 26 and the seventh fold line 28, so that the air flows in and out according to the internal pressure of the hollow portion 4. Compared to the configuration in which air can only enter and exit the flaps on both sides, the area that can be moved under the load of the internal pressure can be dispersed, a large opening is generated locally exceeding the allowable load, or the internal pressure is high It is possible to avoid the food packaging body 1 from being damaged too much. Thereby, the internal pressure of the hollow part 4 can be stably maintained at a pressure suitable for cooking, and is suitable not only for baking but also for steaming.

  When the weight of the foodstuff 3 accommodated in the food packaging body 1 is increased, the frictional force acting between the first wall surface portion 10 and the sandwiched portion 25 and between the sandwiched portion 25 and the placing surface S is also increased. The portion 25 becomes more difficult to move open. Moreover, when the weight of the foodstuff 3 becomes large, the cross section of the 1st wall surface part 10 and the 2nd wall surface part 11 will deform | transform more flatly, and the 3rd fold line 22 will change the outer edge curved part 16 of the 1st flap 12 into. Since the downward pressing force is increased, the first and third flaps 12 and 14 are more difficult to open, and similarly, the fourth folding line 23 moves the outer edge curved portion 17 of the second flap 13 downward. Since the pressing force increases, the second and fourth flaps 13 and 15 are more difficult to move open. When the weight of the food 3 increases, the amount of water vapor generated by the absorption of microwaves increases, and the internal pressure of the hollow portion 4 increases. However, since the airtightness of the box-shaped container increases, an opening is inadvertently generated. A situation in which the internal pressure decreases can be avoided.

  After assembling, the food packaging body 1 is lifted and gripped with the fingers 25, and separated from the first wall surface portion 10 about the sixth fold line 24, so that the hollow portion 4 can be easily enlarged. Can be opened.

  The material forming the food package 1 may be liquid-tight or air-tight, and may not melt and ignite when heated in a microwave oven with the heating element 5 accommodated, for example, 100 ° C., preferably 200 Those that do not melt and ignite at 300 ° C., more preferably at 300 ° C. In this example, it is formed of heat-treated paper as a whole (heat-resistant paper), and the thickness of the paper is not particularly limited, but from the viewpoint of having necessary heat insulation and shape retention, A thickness of about 0.2 to 2.0 mm, preferably about 0.3 to 1.0 mm is employed. The thickness of the paper is appropriately set depending on the type and size of the food 3. Thus, when the food packaging body 1 is formed of paper, assembling is simple and inexpensive like a packaging pillow case. In particular, since paper is excellent in heat insulating properties, cooking by a microwave oven can be effectively performed by making it a little thicker. Moreover, by making it an assembly type, the airtightness (moderate air permeability) of the grade which hold | maintains the water vapor | steam at the time of cooking appropriately in a container can also be ensured easily. Therefore, it can employ | adopt suitably as the food packaging body 1 which does not require high airtightness. In addition, as a raw material which forms the food packaging body 1, not only paper but resin-made sheets, such as a pet film, or the sheet | seat which consists of a composite material which laminated | stacked paper and resin etc. can also be used.

  The sheet-like heating element 5 detachably accommodated in the hollow portion 4 of the food packaging body 1 is formed in a rectangular plate shape as shown in FIGS. 7 and 8, and has rigidity against bending. When the heating element 5 is accommodated in the hollow part 4 of the assembled food packaging body 1, the front side edge 50 and the rear side edge 51 of the heating element 5 are the front side edges of the first wall surface part 10 (sixth bent). Locked near line 28) and near the rear edge (fifth fold line 26). Even if the food 3 placed on the heating element 5 is heavy, the bending rigidity makes it possible for the portions other than the engaging portion of the heating element 5 not to contact the first wall surface part 10, and the heating element 5 of the hollow part 4. Spaces S1 and S2 are formed above and below (see FIGS. 5 and 6). The length between the left and right end sides 52 and 53 of the heating element 5 is shorter than the distance between the first flap 12 and the second flap 13, and the upper and lower spaces S 1 and S 2 on both outer sides of the left and right end sides 52 and 53. The water vapor generated from the food material 3 by the absorption of microwaves flows back through the spaces S1 and S2 (see FIG. 5). The weight of the food 3 is applied to the first wall surface portion 10 via the heating element 5.

  The heating element 5 generates heat by absorbing microwaves. The exothermic temperature is not particularly limited as long as it can be baked and cooked, but is preferably a temperature at which crispyness or charredness can be imparted to the surface of the food material. Specifically, it is about 100-250 degreeC, Preferably it is about 170-250 degreeC.

  The heating element 5 will be described in more detail with reference to FIGS. In this embodiment, the heating element 5 has a configuration in which a heating layer 55 made of a metal vapor deposition film is provided on the surface of the sheet-like substrate 54 and a coating layer 56 made of a plastic film is further provided on the surface.

  The sheet-like substrate 54 is formed of a liquid-absorbing cardboard that has been subjected to a surface treatment such as coating, and reduces the deformation rate of the entire heating element 5 with respect to bending. Thereby, when it heats with a microwave oven, it prevents that the heat generating body 5 deform | transforms as much as possible, maintains the adjacent degree (distance) of the heat generating body 5 with respect to the foodstuff surface, and suppresses the baking unevenness of the foodstuff surface. The covering layer 56 has a function of protecting the heat generating layer 55 and a function of preventing the heat generating layer 55 from directly touching the food material 3.

  The metal vapor deposition film that forms the heat generating layer 55 is made of aluminum. Nickel, gold, silver, zinc, platinum or the like can be used as the metal for forming the metal vapor deposition film. Needless to say, any material that generates the temperature described above can be used for the heating element, and carbon-based conductive powder, metal-based conductive powder, or a mixed powder thereof is used. be able to. A known method may be used as a method for producing the metal vapor deposition film. The covering layer 56 made of a plastic film is formed of polyethylene terephthalate (PET). The covering layer 56 only needs to be formed of a material that does not melt against the heat from the heat generating layer 55. Note that the coating layer 56 may not be provided.

The sheet-like base material 54 is provided with a broken line-shaped slit 57 that penetrates the coating layer 56 and the heat generating layer 55 to reach the cardboard layer of the sheet-like base material 54, so that the oil and soup from the food 3 Is absorbed by the sheet-like base material 54 through the slit 57, thereby preventing oil and juice from accumulating on the upper surface of the heating element 5, so that the heating element 5 can generate heat well. .
The heating element 5 may be a square sheet or a square dish. Moreover, the food packaging body 1 may be sold together with the heating element 5 or may be sold separately.

Next, the usage method of the above-mentioned food packaging body 1 is demonstrated.
The user purchases the food packaging body 1 in the state shown in FIG. 1 and the heating element 5 in FIG. Then, as shown in FIG. 9, the first and second flaps 12 and 13 are made perpendicular to the first wall surface portion 10 by the first and second fold lines 20 and 21 of the food packaging body 1 by hand or the like. The hollow portion 4 is bent toward the side where the hollow portion 4 is formed, and the third and fourth flaps 14 and 15 are perpendicular to the second wall surface portion 11 at the third and fourth folding lines 22 and 23. Bend towards the side to be formed. In addition, the second wall surface portion 11 is bent toward the side where the hollow portion 4 is formed with respect to the first wall surface portion 10 by the fifth fold line 24, and the sandwiched portion 25 is moved to the first fold line 26 by the sixth fold line 26. 2 is bent toward the side where the hollow portion 4 is formed with respect to the wall surface portion 11, and the extended portion 27 is formed with the seventh fold line 28 on the side where the hollow portion 4 is formed with respect to the first wall surface portion 10. Bend towards. And the foodstuff 3 is mounted on the heat generating body 5, and it puts on the surface by the side of the hollow part 4 of the 1st wall surface part 10 being formed.
Then, as shown in FIGS. 10, 11, and 6, the sixth fold line 26 is aligned with the seventh fold line 28 so that the front end portion of the first wall surface portion 10 is wrapped so as to be sandwiched 25. Is bent to the lower surface side of the first wall surface portion 10 and sandwiched between the placing surface H of the food packaging body 1 and the first wall surface portion 10. At this time, the extending portion 27 is joined to the lower surface side (the hollow portion 4 side) of the front end portion of the second wall surface portion 11.

  Moreover, the 1st flap 12 and the 3rd flap 14 overlap, and the 2nd flap 13 and the 4th flap 15 overlap. Specifically, the third flap 14 that covers the upper surface integrally with the second wall surface portion 11 is located outside the first flap 12, and the fourth flap 15 is located outside the second flap 13. Located in. In this state, the third fold line 22 is joined to the outer edge bent portion 16 of the first flap 12 from above and pressed downward, and the fourth fold line 23 is the outer edge bent portion of the second flap 13 from above. 17 and pressed downward. This pressing force increases in proportion to the weight of the food 3.

And the food packaging body 1 is put in a microwave oven, hold | maintaining the state of the food packaging body 1 mentioned above. At this time, the placement surface H is, for example, a microwave oven table. When the microwave is heated, the microwave generated by the microwave is irradiated on and absorbed by the heat generating layer 55 of the heating element 5, so that the heat generating layer 55 generates heat and the surface of the food 3 close to the heating element 5. Is heated to a high temperature to give a crispy feeling or have burnt marks.
In parallel with this, the microwave is also applied to and absorbed by the food material 3, thereby generating water vapor from the food material 3. After the water vapor rises in the upper space S1 of the hollow portion 4, the water vapor returns downward to the periphery of the food material 3 along the curved surface of the second wall surface portion 11 that is bent upward, and a part of the steam generator 5 From both outer sides, it passes through the lower space S2 and returns to the periphery of the food 3 in the upper space S1. Thereby, since the foodstuff 3 is heated in the state where the circumference | surroundings were wrapped with water vapor | steam, steaming cooking can be performed smoothly. The hot air generated from the heating layer 55 of the heating element 5 and the food material 3 also rises in the space S1 in the same manner as the water vapor, and then moves downward around the food material 3 along the curved surface of the second wall surface portion 11 bent upward. When a part of the heating element 5 returns from both outer sides of the heating element 5 to the periphery of the food 3 in the upper space S1 through the lower space S2, it is possible to avoid heating unevenness.

  When the heavy food 3 is stored in the food packaging body 1, the frictional force acting between the first wall surface portion 10 and the sandwiched portion 25 and between the sandwiched portion 25 and the placing surface H is also increased, and the sandwiched portion 25 becomes more difficult to move open. Moreover, when the weight of the foodstuff 3 becomes large, the cross section of the 1st wall surface part 10 and the 2nd wall surface part 11 will deform | transform more flatly, and the 3rd fold line 22 will change the outer edge curved part 16 of the 1st flap 12 into. Since the downward pressing force is large, the first and third flaps 12 and 14 are more difficult to move open. Similarly, the fourth folding line 23 moves the outer edge curved portion 17 of the second flap 13 downward. Since the pressing force increases, the second and fourth flaps 13 and 15 are more difficult to move open. When the weight of the food 5 increases, the amount of water vapor generated by the absorption of microwaves increases, and the internal pressure of the hollow portion 4 increases. However, since the airtightness of the box-shaped container increases, an opening is inadvertently generated. A situation in which the internal pressure decreases can be avoided.

  Since the oil and juice produced by heating the food 3 are absorbed by the sheet-like base material 54 having liquid absorbency through the slit 57 of the heating element 5, the heating state of the heating element 5 can be kept good, The state of the food 3 after cooking can also be kept beautiful.

  After cooking, the food packaging body 1 is taken out of the microwave oven, and the food packaging body 1 is held, the sandwiched portion 25 is grasped with a finger, and the hollow portion 4 is moved upward with the fifth folding line 24 as an axis. The upper part can be greatly opened, and the heating element 5 and the food 3 can be taken out quickly and easily. Since the food packaging body 1 and the heating element 5 are separated from each other, even if a part of the cooked food 3 is attached to the heating element 5, the new heating element 5 is used to make the food packaging body 1 a plurality of times. It is available and economical.

According to the food packaging body 1, the hollow portion 4 can be easily opened and closed, and the food 3 can be taken in and out quickly and easily.
Moreover, when the weight of the foodstuff 3 increases, the force which pushes the to-be-clamped part 25 to the mounting surface H of the food packaging body 1 through the 1st wall surface part 10 will increase, and the to-be-clamped part 25 will be in the 1st wall surface part 10. On the other hand, since the frictional force at the time of opening movement becomes large and it is difficult to open, a large amount of water vapor is generated from the heavy food 3 and even if the internal pressure of the hollow portion 4 is increased, an opening is inadvertently generated and water vapor is generated. Does not escape to the outside of the food package 1 and stable steaming cooking is possible.
Moreover, when the weight of the foodstuff 3 increases, the force by which the third fold line 22 presses the outer edge curved portion 16 of the first flap 12 downward is increased, so that the third fold line 22 is difficult to open. Since the force that presses the outer edge curved portion 17 of the flap 13 of the third flap 13 downward increases and it becomes difficult to open, even if a large amount of water vapor is generated from the heavy food 3 and the internal pressure of the hollow portion 4 increases, the first is inadvertently Through the fourth flaps 12 to 15, the steam does not escape to the outside of the food packaging body 1, and stable steam cooking is possible.
Further, a heating element 5 having bending rigidity that can be accommodated in the hollow portion 4 of the food packaging body 1 on which the food material 3 is placed is provided, and front and rear ends of the heating element 5 so that spaces S1 and S2 are formed above and below the heating element 5. The sides 50 and 51 are locked near the front and rear edges of the first wall portion 10, and the lower and upper spaces S <b> 1 on the lower side and the upper side of the heating element 5 on the outer sides of the left and right edges 52 and 53 of the heating element 5. Since the S2 is formed so as to communicate with each other, the heating element 5 heated by microwaves can be baked and cooked on the ingredients 3, and water vapor generated from the ingredients 3 heated by absorption of the microwaves is formed on the upper side of the heating elements 5. In the space S1, after rising from the food 3 and descending along the curved surface of the second wall surface portion 11 and returning to the periphery of the food 3, a part of the upper food again passes through the space S2 below the heating element 5. 3 around the foodstuff 3 Without would be heated is wrapped in the water vapor it can be smoothly carried out steaming cooking.

  In the first embodiment described above, the front and rear end sides of the heat generating element are locked near the front and rear end sides of the first wall surface part. In this case, the water vapor generated from the food placed on the heating element is placed around the food along the curved surfaces of the first and second wall portions. Reflux. Moreover, only the steam cooking accommodated in the hollow part without using a heat generating body can also be performed.

12 is a partially broken plan view showing the assembled state of the food packaging body according to the second embodiment of the present invention (with the second wall surface removed), and FIG. 13 is taken along line XIII-XIII ′ of FIG. FIG. 14 is a developed view of the tray accommodated in the hollow portion of the food packaging body, and the second embodiment will be described below with reference to these drawings.
12 and 13, reference numeral 1 denotes a food package, and this food package 1 is formed in exactly the same manner as in the first embodiment. The hollow portion 4 of the food package 1 is partitioned into two upper and lower stages by a tray 40. A heating element 5A formed in the same manner as the heating element 5 of the first embodiment is placed on the tray 40, and the foodstuff 30 is placed on the heating element 5A. Of the hollow portion 4, in the space A on the upper side of the tray 40, steam cooking and baking can be performed on the ingredients 31 placed on the tray 40, and in the space B on the lower side of the tray 40, as in the first embodiment. The heating element 5 on which the food 3 is placed can be accommodated to perform baking and steaming.

  The tray 40 shown in the developed view of FIG. 14 is in the form of a single sheet, and a rectangular food material mounting surface 41 and partially arcuate edges 42 and 43 integrated on the left and right sides of the food material mounting surface 41, It has tongue-like handle portions 44 and 45 provided integrally at the center of the upper ends of the edge portions 42 and 43. The width of the food material placement surface 41 in the front-rear direction (vertical direction in FIG. 14) is formed substantially the same as the width in the front-rear direction of the hollow portion 4 of the assembled food packaging body 1. The width in the direction is formed slightly shorter than the width in the left-right direction of the hollow portion 4 of the food packaging body 1. The boundary between the food material mounting surface 41 and the edge portions 42 and 43 forms first and second fold lines 46 and 47, which are valley-folded near the vertical. The boundaries between the edge portions 42 and 43 and the handle portions 44 and 45 form third and fourth fold lines 48 and 49, which are vertically mountain-folded. The tray 40 is formed of the same material as that of the food packaging body 1 and has bending rigidity.

Explaining how to use the second embodiment, the user purchases the food package 1, the heating elements 5, 5A, and the tray 40. And like FIG. 9, the 1st thru | or 4th fold line 18 thru | or 21 of the food packaging body 1 is bend | folded toward the side in which the hollow part 3 is formed with a hand. Further, the fifth to seventh fold lines 22, 26 and 28 are bent to the side where the hollow portion 3 is formed.
And the foodstuff 3 is mounted on the heat generating body 5, and it puts on the surface by the side of the hollow part 4 of the 1st wall surface part 10 being formed. The heating element 5 is locked near the front and rear edges of the first wall surface portion 10 at the front and rear edges as in the first embodiment. Next, the edge portions 42 and 43 of the tray 40 are folded substantially vertically upward from the food material placement surface 41 and the handle portions 44 and 45 are folded horizontally outward, and the heating element 5A is placed on the food material placement surface 41, Further, the foodstuff 30 is placed on the heating element 5 </ b> A, the front end 60 of the tray 40 is locked on the extending portion 27, and the rear end 61 is the first near the fifth fold line 24. Lock to the wall 10.

  Thereafter, in the same manner as in the first embodiment, the sixth fold line 26 of the food package 1 is joined to the seventh fold line 28, and the front end of the first wall surface 10 is wrapped so as to be sandwiched. The portion 25 is bent toward the lower surface side of the first wall surface portion 10 and sandwiched between the placing surface H of the food packaging body 1 and the first wall surface portion 10. At this time, the first flap 12 and the third flap 14 overlap, and the second flap 13 and the fourth flap 15 overlap.

  And the food packaging body 1 is put in a microwave oven, hold | maintaining the state of the food packaging body 1 mentioned above. At this time, the placement surface H is, for example, a microwave oven table. When the microwave is heated, in the space B below the tray 40, the microwave generated by the microwave is irradiated to the heat generating layer 55 of the heat generating element 5 and absorbed, whereby the heat generating layer 55 generates heat, and the heat generating element. The surface of the foodstuff 3 close to 5 is heated to a high temperature to give a crispy feeling or have a burnt line. In parallel, the microwaves are also applied to and absorbed by the food 3, thereby generating water vapor from the food 3. A part of this water vapor stays in the space b1 around the food 3 (the space between the tray 40 and the heating element 5), and a part of the water vapor from the outer side of the heating element 5 to the lower space b2 (the heating element 5 and the second heating element 5). 1) through the space around the food 3 in the space b <b> 1 between the heating element 5 and the tray 40, and the food 3 is heated in a state where the surroundings are wrapped in water vapor. Therefore, steaming cooking can be performed smoothly. The hot air generated from the heat generating layer 55 of the heating element 5 and the food 3 also stays around the food 3 like the water vapor, or flows back to the surroundings of the food 3 through the upper and lower spaces b1, b2 of the heating element 5, Uneven heating can be avoided.

In the space A above the tray 40, the microwave generated by the microwave oven is applied to and absorbed by the heat generating layer 55 of the heat generating body 5A, whereby the heat generating layer 55 generates heat and the food 30 close to the heat generating body 5A The surface is heated to a high temperature and a crispy feeling is imparted or burnt out. In parallel, the microwave is also applied to and absorbed by the food material 30, thereby generating water vapor from the food material 30. This water vapor rises and falls along the curved surface of the second wall surface portion 11 and is refluxed around the foodstuff 30 so that the foodstuff 30 is heated in a state where the circumference is wrapped with water vapor. It can be done smoothly. Since the hot air generated from the food material 30 also returns to the food material 30 in the same manner as the water vapor, the occurrence of uneven heating can be avoided.
As a result, baking and steaming of the plurality of ingredients 3 and 30 can be performed simultaneously with one food package 1.

  When the total weight of the ingredients 3 and 30 stored in the food packaging body 1 is large, the frictional force acting between the first wall surface portion 10 and the sandwiched portion 25 and between the sandwiched portion 23 and the placement surface H is also increased. The sandwiched portion 25 is less likely to move open. Moreover, when the total weight of the foodstuffs 3 and 30 becomes large, the cross section of the 1st wall surface part 10 and the 2nd wall surface part 11 will deform | transform more flatly, and the 3rd bending line 22 will be the outer edge curve of the 1st flap 12. Since the force that presses the portion 16 downward is large, the first and third flaps 12 and 14 are more difficult to move open, and similarly, the fourth folding line 23 is the outer edge curved portion 17 of the second flap 13. Therefore, the second and fourth flaps 13 and 15 are more difficult to move open. When the total weight of the foodstuffs 3 and 30 increases, the amount of water vapor generated by the absorption of microwaves increases and the internal pressure of the hollow portion 4 increases. It is possible to avoid a situation in which the internal pressure decreases.

  The oil and juice produced by heating the ingredients 3 and 30 are absorbed by the sheet-like base material 54 having liquid absorbency through the slits 57 of the heating elements 5 and 5A, so that the heating conditions of the heating elements 5 and 5A are good. The state of the food ingredients 3 and 30 after cooking can also be kept beautiful.

  After cooking, the food packaging body 1 is taken out of the microwave oven, and the food packaging body 1 is held, the sandwiched portion 25 is grasped with a finger, and the hollow portion 4 is moved upward with the fifth folding line 24 as an axis. The upper part can be opened widely, and the tray 40 on which the food 30 is placed and the heating element 5 on which the food 3 is placed can be quickly and easily taken out. Since the food packaging body 1 and the heating elements 5 and 5A are separated, even when a part of the cooked foods 3 and 30 adheres to the heating elements 5 and 5A, the new heating elements 5 and 5A are used. The food package 1 and the tray 40 can be used a plurality of times, which is economical.

  According to the second embodiment, the front end 60 of the tray 40 that can be stored in the food packaging body 1 and that divides the hollow portion 4 into two upper and lower stages is locked to the extending portion 27 and the rear end 61 on the opposite side. Is locked to the first wall surface portion 10 near the fifth fold line 24, so that different food materials 3, 30 can be cooked simultaneously with microwaves on the lower side and the upper side of the tray 40. And since the one end part 60 of the tray 40 is locked by the extending part 27, even if the weight of the food 30 on the upper side of the tray 40 is heavy, the tray 40 is not lowered and the lower space B is not narrowed. The heating element 5 on which the food 3 is placed can be accommodated in the lower space B to perform simultaneous cooking of baking and steaming.

  In the second embodiment described above, the lower heating element is locked near the front and rear end sides of the first wall surface portion at the front and rear end sides, but is curved similarly to the first wall surface portion. The heating element may be used to be placed along the first wall surface. In this case, the water vapor generated from the food placed on the lower heating element passes through the lower wall of the tray to the first wall surface. It recirculates around the foodstuff along the curved surface of the part. Also, do not use the lower heating element to store food in the lower space of the tray and perform only steam cooking, or place the food on the tray without using the upper heating element and perform only steam cooking. You can also.

  Further, in the first and second embodiments described above, a thin slit, for example, a straight line or a wavy curved line, is used as a pressure adjusting portion in a portion where the sandwiched portion does not overlap in the first wall surface portion of the food packaging body. In this case, when the internal pressure of the hollow portion exceeds a certain limit, the food package may be prevented from rupture by leaking water vapor from the slit to the outside. Moreover, the window which stuck the transparent film on the 2nd wall surface part may be provided, and you may enable it to visually recognize the mode of the foodstuff in cooking.

  The present invention can be applied to a food package of a food to be heated.

DESCRIPTION OF SYMBOLS 1 Food packaging body 3, 30 Foodstuff 4 Hollow part 5, 5A Heat generating body 10 1st wall surface part 11 2nd wall surface part 12 1st flap 13 2nd flap 14 3rd flap 15 4th flap 20 4th 1 fold line 21 second fold line 22 third fold line 23 fourth fold line 24 fifth fold line 25 sandwiched portion 26 sixth fold line 27 extension portion 28 seventh fold line 40 tray

Claims (4)

A food packaging body capable of forming a hollow portion for containing foodstuffs therein,
A first wall surface that can be bent convexly and surrounds the bottom surface side of the hollow portion and receives a load of foodstuff;
A second wall surface portion that can be convexly convex and surrounds the top surface side of the hollow portion;
A first flap and a second flap that are integrally provided at the left and right end sides of the first wall surface portion and can be bent by first and second fold lines that surround the left and right side surfaces of the hollow portion. When,
A third flap and a fourth flap, which are integrally provided at the left and right ends of the second wall portion and can be bent by third and fourth fold lines and which surround the left and right side surfaces of the hollow portion. When,
Have
The rear side edge of the first wall surface part and the rear side edge of the second wall surface part are integrated, the boundary forms a fifth fold line, and the first fold line is bent by the fifth fold line. The front side edge of the wall part and the front side edge of the second wall part can be joined or approached,
A sandwiched portion is integrally provided on the front side edge of the second wall surface portion, the boundary forms a sixth fold line, and the sandwiched portion has the first wall surface portion on the front side edge of the second wall surface portion. Can be sandwiched between the mounting surface of the first wall surface portion and the first wall surface portion by being bent toward the lower surface side of the first wall surface portion by a sixth fold line in a state of being joined to or approaching the front side edge of the first wall surface Formed in the
Food packaging body characterized by. A food packaging body capable of forming a hollow portion for containing foodstuffs therein,
A first wall portion having front and rear, left and right four end sides, which can be convexly bent downward and surrounds the bottom surface side of the hollow portion and receives a load of foodstuff;
A second wall surface portion having front and rear, left and right four end sides, capable of being curved upward and surrounding the top surface side of the hollow portion;
A first flap and a second flap that are integrally provided at the left and right side edges of the first wall portion and can be bent vertically by first and second fold lines that surround the left and right side surfaces of the hollow portion. And the flap
A third flap and a fourth flap, which are integrally provided at both left and right side edges of the second wall portion and can be bent vertically by third and fourth fold lines and surround the left and right side surfaces of the hollow portion. And the flap
Have
The rear side edge of the first wall surface part and the rear side edge of the second wall surface part are integrated, and the boundary forms a fifth fold line, and the fold line is bent by the fifth fold line. The front side edge of the first wall surface part and the front side edge of the second wall surface part can be joined or approached,
A sandwiched portion is integrally provided on the front side edge of the second wall surface portion, the boundary forms a sixth fold line, and the sandwiched portion has the first wall surface portion on the front side edge of the second wall surface portion. Can be sandwiched between the mounting surface of the first wall surface portion and the first wall surface portion by being bent toward the lower surface side of the first wall surface portion by a sixth fold line in a state of being joined to or approaching the front side edge of the first wall surface Is formed,
The first flap and the second flap are bent perpendicularly to the first wall surface portion, the third flap and the fourth flap are bent perpendicular to the second wall surface portion, and the front end of the second wall surface portion When folded along the fifth fold line so that the side is joined or approached to the front side edge of the first wall surface portion, the first flap and the third flap overlap, and at this time, the edge of the inner flap is Joined to the fold line of the outer flap, the second flap and the fourth flap overlapped, and the edge of the inner flap was formed to join the fold line of the outer flap,
Food packaging body characterized by. A heating element having bending rigidity that can be stored in the hollow portion of the packaging body with the ingredients placed thereon,
When this heating element is housed in the hollow portion, the front and rear edges of the heating element are locked to the first wall surface so as to create a space above and below,
And that the space above the heating element communicates with the outside of the left and right edges of the heating element,
The food packaging body according to claim 1 or 2, wherein An extending portion is provided integrally on the front side edge of the first wall surface portion, and the boundary can be bent to the hollow portion side as a folding line,
A tray that can be stored in the hollow part and that divides the hollow part into two stages is provided.
One end portion of the tray is locked to the extending portion, and the other end side on the opposite side is locked to the first wall surface portion near the fifth fold line,
The food packaging body according to any one of claims 1 to 3, wherein

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