JP4993976B2 - Food storage and cooking paper containers - Google Patents

Description

  The present invention relates to a food container and a cooking paper container which are assembled from a single sheet-like member and partially bonded together. The present invention also relates to food storage and cooking paper containers particularly suitable for microwave cooking.

  2. Description of the Related Art Various types of containers that have been assembled from a single sheet-like member and that fold four corners are disclosed.

  For example, although the container shown in FIG. 13 is a basic form, it folds and adhere | attaches the folding | turning part (b1) of the four corner parts of a sheet-like member on the side wall part (b2) exterior side.

  In addition, the container shown in FIG. 14 is formed by folding the folded portions (c1) at the four corners of the sheet-like member into the side wall portion inside, and forming a blade portion on the opposite side wall upper ends of the container ( c2) Provided, the blade is folded inward along the shape of the container to cover the folded parts at the four corners, and the container is configured to suppress repulsion of the folded part.

  Next, Patent Document 1 discloses the container shown in FIG. 15, but in this container, the folded portions (d1) at the four corners of the sheet-like member are symmetrical to the outside of the first side wall (d2). And the pair of folded pieces are covered with an engaging piece (d3) connected to the first side wall, and the insertion piece (d4) is inserted into the engaging hole (d5). It is a container.

  Further, Patent Document 2 discloses the container shown in FIG. 16, but in this container, the folded portions (e1) at the four corners of the sheet-like member are symmetrical to the outside of the first side wall (e2). And is assembled by inserting the locking portion (e3) provided continuously to the first side wall portion between the side wall portion and the folded portion.

  Next, Patent Document 3 discloses the container shown in FIG. 17, but in this container, the folded portions (f1) at the four corners of the sheet-like member are folded left and right symmetrically on the outside of the side wall, An engagement hole (f3) is provided in the restraining piece (f2) continuously provided on the side wall, and the container is fixed by inserting the tip of the folded portion into the engagement hole.

  Moreover, although the container shown by FIG. 18 is disclosed by patent document 4, this container piles up the folding | turning part (g1), and fixes these with a locking member (g2), and improves shape retention property. Is disclosed.

  Further, Patent Document 5 discloses a container shown in FIG. Although it is described that this container can also be used for microwave cooking of food, in order to avoid the use of an adhesive, a mask region (h1) is provided on one of the folded portions, and a notch is formed on the other folded portion. A method of providing (h2) and fixing the mask region to the inner surface of the other folded portion by a heat seal is disclosed.

Akisho 50-143936 Shokai 52-67535 JP2003-212229 Shokai 60-89120 JP 2000-238748 A

However, the conventional paper container has the following problems.

  For example, in the container of FIG. 13, it is necessary to bond the outer side of the folded part (b1) to the side wall part (b2), but the outer surface of the folded part (b1) is bonded to the side wall part (b2). However, if the inner surface of the folded portion is not bonded, as shown in FIG. 20, there is a problem that when the pressure (i1) is applied by holding one side wall portion by hand, the side wall portion swings and becomes unstable. It was.

  In order to prevent this, there is a method of bonding the inner surface of the folded portion (b1), but an extra adhesive is required on the inner surface. Further, when a container of food or the like is stored in the container and the container is used as a container for eating, the inner surface is often laminated with plastic or the like because the food directly touches the inner surface of the container. In this case, since the inner surface of the folded portion is also a laminated surface, it may be difficult to adhere with an adhesive compared to the outer surface.

  Furthermore, in the case of a container that can be cooked in a microwave oven, since the inner surface is laminated with, for example, polybutylene terephthalate, which is a heat-resistant plastic, it becomes more difficult to stick with an adhesive. In addition, even if an adhesive is used, the possibility that the adhesive will contaminate the food contained in the tray during heating cannot be denied.

  Next, in the case of FIG. 14, the side wall portion can be fixed, but it is difficult to handle because the blade portion (c2) is large, and when the adhesion between the blade portion (c2) and the bottom surface is insufficient, When liquid food or the like is stored, liquid may enter the gap between the blade portion and the bottom surface, resulting in food loss.

Further, with respect to the cases of FIGS. 15, 16 and 17, these containers are supposed to use a case where no adhesive is used at the time of assembly and the folded portion is not bonded to the side wall portion.
In addition, in FIG. 15, it is necessary to provide the engagement hole (d5), and the manufacturing process becomes complicated, and it takes time for the user to insert the insertion piece (d4) into the engagement hole (d5). There is a problem. Further, in FIG. 16, if the outer side of the folded portion (e1) is bonded to the side wall portion (e2), it becomes difficult to insert the locking portion (e3) between the side wall portion and the folded portion (e1). . In addition, also in FIG. 17, if the outside of the folded portion (f1) is completely bonded to the side wall portion, there is a problem that it becomes difficult to insert the engagement hole (f3) at the tip of the folded portion.

  18 and 19, the side wall portion and the folded portion are fixed as an effect, but the invention of FIG. 18 requires an additional locking member (g2) that penetrates the folded portion (g1). There is a difficulty that it is. Further, in the invention of FIG. 18, the mask region (h1) fixed by the heat seal is only a part of the folded portion, so that the fixing force is not sufficient, and the seal between the folded portions may be peeled off after sealing.

  As described above, in the container shown in FIGS. 14 to 19, the swing of the side wall portion can be suppressed, but inconvenience occurs in other aspects.

Therefore, we have developed a food storage container and cooking paper container assembled from a single sheet material that has the structure that can suppress the swinging of the side wall without trouble. It was an issue. In particular, the present invention provides a food storage and cooking container capable of suppressing the swinging of the side wall even in the case of a food cooking container such as a microwave oven laminated with a heat-resistant plastic film or the like that is difficult to adhere to the inner surface. That was the issue.

The present invention has been made to solve the above problems, and as a result of intensive research, we have invented the following food storage and cooking containers. That is, the present invention
A food storage and cooking paper container configured by folding a sheet of paper,
A rectangular bottom surface portion, a pair of first side wall portions rising from one opposite two sides of the bottom surface portion, and a pair of second side wall portions rising from the other two opposite sides of the bottom surface portion; A folded portion that is provided between the adjacent first and second sidewall portions and is folded by a conformal crease line extending linearly from a corner portion of the bottom surface portion;
A handle portion continuously provided on the outside of the first side wall portion, folded and extended outward from the container opening;
A locking portion having a cut piece connected to the outside of the handle portion;
A lid portion provided outside the second side wall portion;
The folded portion is bent on the first side wall portion side and bonded on the outer surface in contact with the first side wall portion side;
A container for food storage and cooking paper, wherein the first side wall portion and the folded portion are fixed by inserting a cut piece of the locking portion between the inner surfaces of the pair of folded folded portions. .
And
The food storage and cooking paper container according to claim 1, wherein a plastic film is laminated on the paper sheet material.
In addition, the food storage and cooking paper container according to claim 1 or 2, wherein the cooking is microwave cooking.
Is also intended.

By adopting the configuration of the present invention, it is possible to provide a container for food storage and cooking that is a paper container assembled from a single sheet material and has a structure that can suppress the swing of the side wall without trouble. . In particular, the present invention provides a food storage and cooking container capable of suppressing the swinging of the side wall even in the case of a food cooking container such as a microwave oven laminated with a heat-resistant plastic film or the like that is difficult to adhere to the inner surface. be able to.

  This container can be used both as a food storage container for storing food inside and transporting and selling it, and as a food cooking container. A detailed description will be given.

  First, as an example of the embodiment of the present invention, FIG. 1 shows a development view, which will be described. FIG. 1 is only one embodiment of the present invention, and the present invention is not limited to this embodiment. In FIG. 1, the alternate long and short dash line indicates an internal folding. Moreover, a long broken line shows an external folding. A broken line indicates an internal folding when used as a food storage container, and an external folding when used as a food cooking container.

  This paper sheet material can be selected in various forms. For example, the paper sheet material is made of paper and plastic film in two layers so that it becomes the inner surface or outer surface of the container after the plastic film is assembled. It is possible to use a paper sheet made of three layers such as laminating. As the paper, not only a single layer but also three layers such as a corrugated cardboard can be used, but it is preferable to use a base sheet having relatively high rigidity.

  As the plastic film, various plastic films can be used as long as they are cooked at room temperature. However, when heating, it is preferable to use a heat-resistant plastic film for the inner surface.

  Specifically, for example, if it is polybutylene terephthalate (PBT), the thickness is about 15-30 μm, if it is polyethylene terephthalate (PET), it is about 12-30 μm, and if it is polypropylene (PP), it is about 15-40 μm. Can be used.

  As shown in FIG. 1, the unfolded container is formed as a single sheet. In this unfolded view, first, a square or rectangular bottom surface (1) having four sides (a) is shown. A substantially trapezoidal first side wall part (2) and second side wall part (3) having four sides a, provided between the first side wall part (2) and the second side wall part (3); A folding portion (4) sharing c is provided.

  Here, in this invention, since it is necessary to be able to insert the notch piece (7) of a latching | locking part (6) in a pair of folding | turning part (4) adhere | attached on the 1st side wall part, it is a folding | returning part. The shape of (4) is preferably a substantially triangular shape with the sides b and c being two sides. In addition, as shown in FIG. 1, the vicinity of the outer peripheral end portion of the equiangular crease line (d) can be formed into a hollow shape or the like.

  Next, the handle part (5) connected by sharing the side e from the first side wall part (2) is provided. The main handle portion (5) is folded at the side f and the sides e and g are bent, thereby extending the container. In addition, when the handle portion (5) is cooked in a microwave oven or the like, the container may become hot and difficult to hold with bare hands. In such a case, the handle portion may be used to move the container. it can.

  At the time of assembling the cooking container, which will be described later, after inserting the cut piece (7) into the pair of folded portions (4) bonded to the first side wall portion, the handle portion is oriented in the horizontal direction. The distance between the side e and the side f is preferably longer than the distance between the side f and the side g by about the thickness of the sheet.

  Next, the latching | locking part (6) connected via the side g from the handle part (5) is provided. The locking portion (6) is cut from the outer peripheral portion, is provided with a cut piece (7), and is bent at the side h. Various shapes can be selected as the shape of the cut.

Furthermore, the cover part (8) connected by sharing the edge | side i from the 2nd side wall part (3) is provided.
In the case of FIG. 1, the lid portion (8) is connected to both the second side wall portion (3), and an upper closed type is disclosed. However, the lid portion (8) is connected to one second side wall portion (3). Alternatively, an end-closed type may be used in which all the lid portions are connected to each other. Furthermore, as for the manner of engagement of the lid, not only those shown in FIG. 1 but also various manners can be used.

  This container can be used as a packaging container that contains food inside, and can also be used as a cooking container that cooks food stored inside, but the method of assembling the container differs depending on the case. Hereinafter, each of these cases will be described.

  First, the procedure in the case of using this container as a container which accommodated the food inside is demonstrated. From the developed view of FIG. 1, the container is assembled by the steps shown in FIGS. That is, the rectangular bottom surface 1 of the sheet-like member is defined, and the first side wall portion (2) and the second side wall portion (3) are erected from each side a of the bottom surface 1 (FIG. 2). Further, the folding portions (4) at the four corners which are the surplus portions are folded so that the folding lines b and c coincide with each other while folding inward at the folding line d (FIGS. 3 and 4). Next, the folded back part (4) is folded down to the first side wall part (2) side, and is adhered and fixed to the first side wall part and the contact surface with an adhesive or the like (FIG. 5). In this case, as the adhesive, glue, hot melt, or the like can be used.

  Next, as a necessary food material in the formed container, for example, packed noodles, ingredients and the like are stored, and a handle portion (5) and a locking portion (6) connected to the first side wall portion. Is folded to the container side by folding line e, and the upper portion is covered with the lid portion (8) and engaged with the engaging portion of the lid portion (FIG. 6).

  In this state, or after covering it with a shrink film such as polypropylene, the food in the container can be transported and sold.

  Next, a procedure for taking out food materials from a container in which food is stored and cooking with a microwave oven or the like will be described.

  From the state of FIG. 6 described above, the engagement of the lid portion (8) is released (FIG. 7), and the handle portion (5) and the locking portion (6) are folded outward (FIG. 8). Next, after taking out food etc. inside, bend side e, f, and g, bend cut edge (7) at side h, and bond the cut piece (7) to first side wall (2) It inserts between the inner surfaces of the pair of folded portions (4) (FIG. 9). Next, the cut piece (7) is inserted to the inside of the pair of folded portions (4), and the other locking portions are left outside the folded portions (4) to fix the first side wall portion (2). (FIG. 10).

  When the cut piece (7) is inserted between the inner surfaces of the pair of folded portions (4) bonded to the first side wall portion (2), from the side g to the side e of the handle portion (5). Since there is an interval, the operation of inserting the cut piece (7) into the pair of folded portions (4) can be easily performed.

  Next, in order to form the handle portion (5), the handle portion is folded so as to be horizontal to the outside of the container opening at sides f and g, and this crease is attached to complete the cooking container ( FIG. 11).

  In this state, after the previously taken out internal food or the like is put in a container, it is mixed and cooked as it is, or after mixing, it is cooked with a microwave oven or the like. For example, if packed noodles, ingredients, etc. are stored, each pack is opened, placed in a container, optionally added with water, sauce, etc., and then the upper lid as necessary Engage and cook in a microwave oven.

  Specifically, when it is desired to suppress leakage of steam generated from the inside of the food product to the outside of the container by heating, the microwave oven cooking is performed with the lid portion (8) engaged and the upper portion covered (FIG. 12). I do.

After cooking, the inside of the lid (8) can be disengaged, the lid can be opened, and the inside can be eaten as it is. At this time, if the container becomes hot and difficult to hold with bare hands, the container can be moved with the handle portion (5) extending outward from the container opening.

By utilizing the present invention, it is possible to provide a container capable of suppressing the swing of the side wall portion in a food storage and cooking container manufactured from a single sheet of paper. In addition, by laminating a heat-resistant plastic film, the cooked container can be handled stably even when cooking with a microwave oven or the like.

It is an expanded view of the Example of the paper container concerning this invention. It is a figure in the middle of raising the side wall part in the middle of the assembly of a food storage container. It is a figure in the middle of folding of a folding | returning part in the middle of an assembly of a food storage container. It is a figure in the middle of folding the folding | turning part to a 1st side wall part in the middle of the assembly of a food storage container. It is a figure after the folding | turning part adhere | attached the 1st side wall part in the middle of the assembly of a food storage container. It is a figure of the state which engaged the cover part after food storage. It is the figure after releasing engagement of a cover part in the middle of an assembly of a cooking container. It is the figure which opened the handle part and the latching | locking part in the middle of the assembly of the container for cooking. It is the figure which started the insertion of the notch piece in the folding | turning part by folding the latching part in the middle of the assembly of the cooking container. It is the figure which completed the insertion of the cut piece in the folding | turning part by folding the latching | locking part in the middle of the assembly of the cooking container. It is the figure which bent the handle part in the horizontal state in the middle of the assembly of the container for cooking. It is a figure after engaging the cover part of the container for cooking. It is a figure of the conventional paper container. It is a figure of the conventional paper container. It is a figure of the paper container disclosed by Japanese Utility Model Laid-Open No. 50-143936. It is a figure of the paper container disclosed by Japanese Utility Model Laid-Open No. 52-67535. It is a figure of the paper container disclosed by Unexamined-Japanese-Patent No. 2003-212229. It is a figure of the paper container disclosed by Japanese Utility Model Laid-Open No. 60-89120. It is a figure of the paper container disclosed by Unexamined-Japanese-Patent No. 2000-238748. It is a figure at the time of applying a pressure to the side wall part of the conventional paper container of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bottom face part 2 1st side wall part 3 2nd side wall part 4 Folding part 5 Handle part 6 Locking part 7 Cutting piece a Boundary crease line b of a bottom face part and a side wall part Boundary crease line of a 2nd side wall part and a turning part c Boundary crease line between the first side wall and the folded part d Equiangular crease line of the folded part e Boundary crease line between the handle part and the first side wall part f Fold line of the handle part g Boundary crease line h between the handle part and the locking part Incision piece crease line i of stop part Boundary crease line of lid part and second side wall part

Claims (3)

A food storage and cooking paper container configured by folding a sheet of paper,
A rectangular bottom surface portion, a pair of first side wall portions rising from one opposite two sides of the bottom surface portion, and a pair of second side wall portions rising from the other two opposite sides of the bottom surface portion; A folded portion that is provided between the adjacent first and second sidewall portions and is folded by a conformal crease line extending linearly from a corner portion of the bottom surface portion;
A handle portion continuously provided on the outside of the first side wall portion, folded and extended outward from the container opening;
A locking portion having a cut piece connected to the outside of the handle portion;
A lid portion provided outside the second side wall portion;
The folded portion is bent on the first side wall portion side and bonded on the outer surface in contact with the first side wall portion side;
A container for food storage and cooking paper, wherein the first side wall portion and the folded portion are fixed by inserting a cut piece of the locking portion between the inner surfaces of the pair of folded folded portions. .
The food storage and cooking paper container according to claim 1, wherein a plastic film is laminated on the paper sheet material.
  The food storage and cooking paper container according to claim 1 or 2, wherein the cooking is microwave cooking.