JP7624689B2 - Molded cooked rice food packaging - Google Patents

Description

The present invention relates to a sheet-like packaging body for packaging formed cooked rice foods such as rice balls, and more specifically to a packaging body for formed cooked rice foods in which a sheet-like food such as nori seaweed is wrapped around the formed cooked rice food in an isolated state, and the sheet-like food is wrapped around the surface of the formed cooked rice food when the packaging is opened and removed.

The background technology is explained below using Figures 4 to 9.

A widely used package P for formed cooked rice food has a rectangular front film 11 that is large enough to encase a triangular rice ball R and has a dividing means (here, a cutting tape 12) for dividing the front film into two in the short direction, and a pair of back film pieces 14A, 14B that divide the back film into two in the width direction (see, for example, Patent Document 1).

The formed cooked rice food packaging material P has the ends of the back film pieces 14A, 14B overlapped near the location of the front film 11 that corresponds to the dividing means (cut tape 12), and the front film is covered in whole or in part with a pair of back film pieces, and a portion of the front film and back film pieces are joined together to form a pocket portion for storing sheet-like food (in this case, seaweed S) inside.

The packaging material P is used to package the rice ball R by bringing the surfaces of the back film pieces 14A, 14B into contact with the rice ball R, specifically, the bottom of the rice ball is positioned near the center between the front and back of the packaging material, the rear half of the packaging material covers the back of the rice ball, and then the front half covers the front (see Figure 6). In this case, since the rice ball is triangular and the packaging material is rectangular, there are blank areas A, A on the left and right of the packaging material, with the apexes being the corners of the front short side of the packaging material. These blank areas are folded back and overlapped over the rear half of the packaging material covering the back of the rice ball and partially adhered, and then a label L is adhered on top of that to fix the packaged state (see Figures 7-8). When opening the package, the dividing means (cutting tape 12) on the top film 11 is pulled up from the front side of the rice ball R using the notches 13, 13 at the end, dividing the top film into left and right parts, and also dividing the other parts (margin parts A, A) of the packaging material that are folded over in a position that crosses the path of the cutting tape (see FIG. 9). In this case, since the rice ball R side has already been divided into left and right parts by the pair of back film pieces 14A, 14B, the packaging material P ends up being divided into left and right parts, and by pulling it to the left and right, the packaging material is removed leaving behind the sheet-like food (seaweed S) stored in the pocket, and only the sheet-like food (seaweed) remains wrapped on the surface of the rice ball.

In the above-mentioned packaging material, the sheet that constitutes the packaging material has a pocket inside for storing sheet-like foods such as seaweed, but moisture (steam) that evaporates from the rice balls and oil that seeps out from the food can get into the pocket through the overlapping areas between the backing film pieces, making the stored sheet-like food damp and sticky, and in the case of seaweed, this can cause the problem of losing the crisp texture that is characteristic of the seaweed.

An invention has been proposed that aims to improve the airtightness of the overlapping portion between a pair of back film pieces by adhering a strip of film piece to one end of the back film piece so that one end of the strip of film piece is open and forms a gap, and then inserting the other end of the back film piece into the gap (Patent Document 2).

Figure 3 illustrates the packaging material, where 21 is the front film, 22 is the cutting tape that serves as the dividing means, 24A and 24B are a pair of rear film pieces, 25 is a strip-shaped film piece, and K is a gap.

By the way, in the above-mentioned packaging material, the packaging material is divided into left and right halves, and by pulling the packaging material to the left and right, the packaging material is removed, leaving behind the sheet-like food (seaweed) contained in the pocket, and only the sheet-like food (seaweed) remains wrapped on the surface of the rice ball. In this case, however, due to the adhesiveness of the surface of the rice ball, the piece of backing film in contact with it may pull the rice ball to the left and right, causing the rice ball to be damaged.

An invention has been proposed in which a pair of back film pieces in the packaging are folded back on one side to provide a folded surface, and the folded surface is brought into contact with the surface of the rice ball, so that when the back film pieces are removed from the rice ball, they are gradually peeled away from the folded surface of the back film pieces, preventing damage to the rice ball (Patent Document 3).

Utility Model Registration No. 3001212 JP 2004-154064 A Japanese Utility Model Application Publication No. 05-060294

In the above-mentioned invention, in which a pair of back film pieces are folded back on one side to form a folded portion and the folded portion is brought into contact with the surface of the rice ball, the folded end that constitutes the folded surface tends to swell and float away from the overlapping film surface, so there is a concern that moisture (steam) evaporating from the rice ball and oil seeping out from the food may easily enter the pocket portion through the overlapping portion of the back film pieces, compared to when the end of the film piece is in close contact with the rice ball.

On the other hand, in the above-mentioned invention, overlapping the ends of the back film pieces is essential because moisture (steam) evaporating from the rice ball and oil seeping out from the food can directly penetrate into the pocket, but there is also concern that the overlapping of the back film pieces may prevent them from being gradually peeled away from the rice ball.

The present invention was created with the aim of providing a packaging material for formed cooked rice foods that solves the above problems.

That is, the packaging material for formed cooked rice food of the present invention comprises a front film having a dividing means for dividing the front film in two in the width direction, a pair of back film pieces formed by dividing the back film in two in the width direction, and the pair of back film pieces cover all or part of the front film with their ends overlapping each other near the location corresponding to the dividing means of the front film, and the front film and parts of the back film pieces are joined to form a pocket portion for storing sheet-like food therein, and the surface of the back film piece becomes the surface that comes into contact with the formed cooked rice food.
A second back side film piece having a joint portion located rearward is superimposed on the surface of each of the pair of back side film pieces near the end portions so as to be vertically openable and closable with the joint portion as a fulcrum;
a front portion of each of the second back film pieces is folded backward so that the folded portion is located near a portion corresponding to the dividing means of the front film to provide a folded surface;
The end of one of the back film pieces located on the upper side of the overlapping portion is inserted between the front surface of the other back film piece and the rear surface of the second back film piece,
The folded surface of the second back film piece is characterized in that it comes into contact with the formed cooked rice food.

The invention described in claim 2 is characterized in that the shaped cooked rice food packaging material has at least one partial joint on the folded surface of the second back film piece.

The above-mentioned problem of moisture (steam) evaporating from the rice balls and oil seeping out from the food entering the pocket through the overlapping areas of the backing film pieces, making the contained sheet-like food wet and sticky, is not technically related to the problem of the rice ball being damaged when the adhesive surface of the rice ball causes the backing film pieces in contact with it to pull the rice ball left and right, but they have in common the fact that they impair the marketability of formed cooked rice foods such as rice balls when they are packaged and distributed. However, until now, there has been no invention that focuses on solving these two problems comprehensively.

First, according to the present invention, the folded surface of each second back film piece that is folded back so that the front folded portion is located near the location corresponding to the dividing means of the front film becomes the surface that comes into contact with the formed cooked rice food, so that when the second back film piece is removed from the rice ball, it is gradually peeled away from the rice ball from the folded portion of the second back film piece, thereby preventing damage to the rice ball.

Secondly, one end of the second back film piece is open between the first back film piece to form a gap into which the end of the other back film piece is inserted, improving the airtightness of the overlapping portion between the film pieces.

At first glance, the above effects seem to be merely a compilation of known inventions. However, in the present invention, the second effect eliminates the need to overlap the ends of the second back film pieces, ensuring that the second back film piece is gradually peeled off the rice ball from the folded-back portion, resulting in effects that are greater than the sum of all known inventions.

In addition, the second back film piece on one side serves the combined function of improving the airtightness of the overlapping portion of the film pieces and facilitating peeling away from the rice ball, and compared to the prior art shown in Figure 3, the only additional member required is the other second back film piece, so from the standpoint of streamlining the design, it is possible to obtain effects that are greater than the sum of all the known inventions.

In addition, according to the invention described in claim 2, at least one partial joint is provided on the folded surface of the second back side film piece, so that when the film of the packaging material of the present invention is absorbed and transported, the folded surface of the second back side film piece is prevented from rolling up and impeding transport.

FIG. 2 is an exploded perspective view of the molded cooked rice food packaging material of the present invention. Same as above, cross-sectional view. FIG. 1 is a cross-sectional view of a conventional packaging material for formed cooked rice food. FIG. 1 is a plan view of a conventional packaging material for formed cooked rice food. FIG. FIG. FIG. FIG. FIG.

Specific examples of the present invention will be described below with reference to the attached drawings. Here, the example will be described using a packaging material for rice balls wrapped in nori seaweed as an example of a packaging material for formed cooked rice food. Figure 1 is a perspective view of the packaging material, and Figure 2 is a cross-sectional view of the packaging material.

This packaging material for seaweed-wrapped rice balls is made by laminating a top film 1 with a heat-sealed layer on the back side and back film pieces 4A, 4B to form a pocket inside for storing seaweed S. The top film 1 is rectangular with four notches at the four corners, and has a dividing means for cutting a strip to divide it in two in the short direction. In this embodiment, cutting tape 3 attached to the top film 1 is used as the dividing means, but the dividing means is not limited to cut tape as long as it can cut a strip into the top film 1 by pulling it up. Also, to make it easier to tear the dividing means (strip tape) when it starts to be pulled up, a pair of notches 2, 2 are provided on the left and right of the starting point of the dividing means at one end of the top film.

The back film piece is the film that is positioned on the rice ball side during packaging, and is composed of a pair of back film pieces 4A and 4B that are divided into two in the short direction to cover all or part of the front film 1. These film pieces form an overlapping portion where a portion of the film overlaps at a location that corresponds to the dividing means of the front film, and one back film piece 4A overlaps the other back film piece 4B.

The front film 1 and the back film pieces 4A and 4B are fused and polymerized at heat seal sections H1 and H2 around the periphery of the back film, excluding the overlapping areas between the back film pieces, to form a pocket section for storing seaweed S inside.

In the figure, the reference numerals 5 and 6 denote a pair of second back film pieces constituting the characteristic portion of the present invention. One of the second back film pieces 5 is fused to the surface of the back film piece 4B near the end thereof by the heat seal portion H3 with the joint portion positioned toward the rear. The second back film piece 5 is folded over the back film piece 4B so as to be able to open and close up and down, with the joint portion as a fulcrum, and the front fold portion 5X is folded back so as to be positioned near the location corresponding to the cut tape 3 of the front film 1, forming the folded surface 5Y. The other second back film piece 6 is fused to the surface of the back film piece 4A near the end thereof by the heat seal portion H4 with the joint portion positioned toward the rear. The second back film piece 6 is fused to the surface of the back film piece 4A near the end thereof by the heat seal portion H4 with the joint portion positioned toward the rear. The second back film piece 6 is fused to the back film piece 4A so as to be able to open and close up and down, with the joint portion as a fulcrum, and the front fold portion 6X is folded back so as to be positioned near the location corresponding to the cut tape 3 of the front film 1, forming the folded surface 6Y.

The folded surfaces 5Y, 6Y of the second back film pieces 5, 6 are provided with at least one partial joint with the folded surface, which prevents the folded surface of the second back film piece from rolling up and impeding transport when the packaging film is absorbed and transported. Here, point-shaped heat seal parts H5, H5 are provided at the front and back of each.

As is clear from the above explanation, in the packaging material of the present invention, there is no need for the folded surfaces 5X, 5Y of the second back film pieces 5, 6 to have the function of preventing moisture (steam) evaporating from the rice ball or oil seeping out from the food from entering the pocket portion through the overlapping portion of the back film pieces, so the second back film pieces do not overlap, and the respective folded portions are butted together or spaced apart, so that the folded portion of the second back film piece can be smoothly peeled off from the rice ball so as to be gradually turned up.

The method of using the packaging material of the present invention is exactly the same as that of the known packaging material described with reference to Figures 5 to 9. That is, the bottom of the rice ball is positioned near the center of the front and rear of the packaging material, the rear half of the packaging material covers the back of the rice ball, and then the front half covers the front. In this case, since the rice ball is triangular and the packaging material is rectangular, there are blank areas on the left and right of the packaging material, with the corners of the front short side of the packaging material as vertices. These blank areas are folded over and partially glued onto the rear half of the packaging material that covers the back of the rice ball, and a label L is glued on top of them to fix the packaged state. When opening the package, the cutting tape 3 applied to the front film 1 is pulled up from the front side of the rice ball using the cuts 2, 2 at the end, which divides the front film into left and right parts in sequence, and the other parts of the packaging material that are folded over in a position that crosses the path of the cutting tape are also divided. In this case, since the rice ball R side is already divided into left and right by a pair of back film pieces 4A, 4B and second back film pieces 5, 6, the wrapping material ends up being divided into left and right halves, and by pulling it to the left and right, the wrapping material is removed leaving behind the seaweed S contained in the pocket, and only the seaweed remains wrapped on the surface of the rice ball.

1 Front film 2 Incision 3 Cut tape 4A Back film piece 4B Back film piece 5 Second back film piece 6 Second back film piece 5X Folded portion of second back film piece 6X Folded portion of second back film piece 5Y Folded surface of second back film piece 6Y Folded surface of second back film piece H1 Heat sealed portion H2 Heat sealed portion H3 Heat sealed portion H4 Heat sealed portion H5 Heat sealed portion

Claims (4)

A packaging material for formed cooked rice food, comprising a front film having a dividing means for dividing the front film into two in the width direction, a pair of back film pieces formed by dividing the back film into two in the width direction, and covering all or a part of the front film with the pair of back film pieces while overlapping each other's ends near a portion of the front film corresponding to the dividing means, and joining a portion of the front film and the back film pieces to form a pocket portion for storing a sheet-like food therein, the surface of the back film piece being the surface that comes into contact with the formed cooked rice food,
One end of the pair of second back side film pieces is joined to the end of the packaging material on the surface of each of the pair of back side film pieces, so that the second back side film pieces are overlapped so as to open and close in the direction of approaching and separating from the back side film pieces with the above-mentioned joint as a fulcrum,
the other end of each of the second back side film pieces is folded back toward the end of the packaging material of each of the pair of back side film pieces so that the folded back portion is located near a portion corresponding to the dividing means of the front side film to provide a folded back surface;
The end of one of the back film pieces located on the upper side of the overlapping portion is inserted between the front surface of the other back film piece and the rear surface of the second back film piece,
A packaging material for formed cooked rice food, characterized in that the folded surface of the second back film piece is the surface that comes into contact with the formed cooked rice food. The formed cooked rice food packaging material according to claim 1, in which at least one partial joint is provided on the folded surface of the second back film piece. The package for formed cooked rice food according to claim 1 or 2, wherein the formed cooked rice food is a rice ball. The formed cooked rice food packaging according to any one of claims 1 to 3, wherein the sheet-like food is seaweed.

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