JP2007174985A - Packed rice ball - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packed rice ball excellent in openability when breaking a rectangular packing body containing boiled rice mass and taking out the boiled rice mass. <P>SOLUTION: This packed rice ball (10) has a rectangular packing body (11) formed by folding a nearly rectangular resin film (11a) in a box form and containing boiled rice mass (O) in the box form, space parts (12)-(15) formed at intervals to the boiled rice mass in the corner inside of the rectangular packing body (11), and a belt-like easily cutting part (16) set on a diagonal line connecting the opposed space parts (12) and (14) of the surface of rectangular packing body. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a packaged rice ball that holds food such as a lump of cooked rice formed in a triangular shape or a circular shape in a state of being packaged with a resin film.

  Rice balls sold at convenience stores and supermarkets come in various shapes such as triangles, circles, and rectangles, all of which can be provided in a state of being wrapped using a resin film such as polycellophane. Many. Examples of such rice balls are those packaged as follows.

FIG. 7 is an explanatory view showing the procedure for packaging the cooked rice lump in the conventional example. Here, the cooked rice lump 50 manufactured in a disk shape is first placed on the lower support member 51 (FIG. 7A). And it arrange | positions so that the thin resin film 52 may be covered from the upper direction of this cooked rice lump 50. FIG.
Next, the front ends of the pair of folding members 53 and 54 facing left and right on the horizontal plane are positioned between the lower portion of the cooked rice lump 50 and the lower support member 51 (FIG. 7B). By inserting the leading ends of the folding members 53 and 54 so as to push them in, the lower part of the resin film 52 is folded back so as to adjust the shape, and the resin film 52 is brought into close contact with the cooked rice lump 50 (FIG. 7C). )).
Then, as shown in FIG. 7 (d), the cooked rice lump 50 with the resin film 52 affixed to the surface thereof is moved upward from the lower support member 51 while being placed on the folding members 53 and 54. Finally, a packing rice ball 55 is attached by pressing the heater member 54 or the like against the lower part of the resin film 52 so as to hold the cooked rice cake 50 in the resin film 52 in a close contact state as shown in FIG. Has been manufactured.

In Patent Document 1, laver is interposed inside the outer film provided with a cut tape in the central longitudinal direction, and two inner films are overlapped at the central portion by overlapping each half width of the outer film. The outer periphery is heat-sealed, a corner notch is formed at one corner of the short side, and a diagonal notch is formed at the other corner, and the corner having the corner notch is folded inward to wrap the rice balls. In addition, a packaging film is described in which corners having oblique cutouts are folded outward.
JP-A-9-185

However, in the case where the cooked rice cake 50 is encapsulated in the resin film 52 as in the prior art, the periphery of the cooked rice cake 50 formed in a disc shape or the like is enclosed and held in a state of being in close contact with the resin film 52. Therefore, when the band-shaped easy-cutting portion such as a cut tape provided on the surface of the resin film 52 is grasped and torn, there is no opening enough to easily take out the cooked rice lump 50, and the fingertip is naturally held. There is no gap. Therefore, there is a problem that it may take time to take out the cooked rice lump 50.
In particular, in the case of using the packaging film of Patent Document 1, since the corner notches and the oblique notches are formed at the corners, or two inner films separated on the left and right are necessary, the film forming step In addition, the amount of materials used for the film and the like has increased, leading to high costs.

  The present invention was made in order to solve the above-mentioned conventional problems, and when the resin film containing the cooked rice lump is broken to take out the cooked rice lump, an opening can be secured after the resin film breaks, even if the elderly It is an object of the present invention to provide a packaging rice ball that can be easily taken out even by persons with disabilities and the like, has excellent openability, and is advantageous in terms of cost and does not require any particular processing of the resin film.

(1) The packaging rice ball of the present invention made in order to solve the above-mentioned conventional problems is a packaging rice ball in which a rice cake lump of a predetermined shape is stored in a rectangular packaging body formed by folding a substantially rectangular resin film into a box shape. In the corner of the rectangular package body, a space portion formed with a space with respect to the cooked rice lump is provided on a diagonal line connecting the space portions facing each other on the surface of the rectangular package body. A belt-shaped easy cutting portion.

(2) The packaging rice ball of the present invention is characterized in that, in the above (1), a sealing seal of a predetermined shape is attached to the back surface of the rectangular package corresponding to the starting end of the band-shaped easily cut portion. have.

(3) In the packaging rice ball of the present invention, in the above (1) or (2), the resin film is a heat-meltable plastic having a film thickness of 25 to 35 μm, and the four corners of the resin film containing the cooked rice cake are included. It is also characterized by a film welding temperature of 195 to 205 ° C. and a film welding time of 0.6 to 0.7 seconds when the folded end portions are thermally welded to form a substantially box shape. have.

(4) The packaging rice ball of the present invention is obtained by laminating a sheet-shaped food product between a front resin film and a back resin film in (1) to (3) above and welding the periphery thereof. It also has a feature.

  The packaged rice ball according to the present invention includes a rice cake lump enclosed in a rectangular package formed by folding a resin film, and a space portion formed with a space with respect to the rice lump inside the corner of the rectangular package. A strip-shaped easily cut portion provided on the diagonal line connecting the opposing space portions, and when the rectangular package containing the cooked rice lump is broken using the strip-shaped easily cut portion, the resin film A sufficient interval can be ensured between the cooked rice lump, and the entire cooked rice lump does not adhere to the resin film, making it difficult to remove the cooked rice lump.

The packaging rice ball of the present embodiment is a packaging rice ball in which a block of cooked rice is stored in a rectangular package formed by folding a substantially rectangular resin film into a box shape. A space portion formed with an interval with respect to the cooked rice lump, and a band-shaped easy cutting portion provided on a diagonal line connecting the space portions facing each other on the surface of the rectangular package body. . Thus, by providing predetermined space portions at the four corners of the rectangular package formed in a box shape, the rectangular package containing the cooked rice lump is broken with the resin film when the band-shaped easily cut portion is used to break the rectangular package A sufficient space for facilitating the removal of the cooked rice mass can be ensured between the cooked rice cake and the cooked rice cake. Moreover, for example, a fingertip can be put in the interval to take out the cooked rice lump, which makes it easier to take out. In addition, the space provided around the cooked rice chunk can be used as an atmosphere adjustment space to maintain the texture and flavor of the contained cooked rice chunk, or to add a supplementary food to the space.
By the way, the strip-shaped easily cut portion may be formed in a substantially straight shape, or may be formed in a wave shape in which wide portions and narrow portions are alternately formed.

  Further, the packaging rice ball of the present embodiment has, for example, a square-shaped sealing seal attached to the back surface of the rectangular package corresponding to the starting end of the strip-shaped easy cutting portion, and the starting end of the strip-shaped easy cutting portion. Even if the tabs and the like provided on the plate are peeled off somewhat, the internal airtightness can be maintained, and the cooked rice lump can be kept hygienic.

  In the packaging rice ball of the present embodiment, the resin film is a heat-meltable plastic having a predetermined film thickness, the resin film containing the rice cake lump is folded into a substantially box shape, and the stacked ends are heated. Since the film welding temperature and the film welding time at the time of welding can also be set as specific ranges, respectively, the lower end side of the rectangular package folded in a vertical and horizontal quadruple can be reliably welded and sealed. . Therefore, there is a risk of damaging the commercial value, such as the film surface melts ugly, excessively presses the welding jig against the cooked rice lump and deforms, or the temperature is too high for the film thickness to break the cooked rice lump. In addition, it is possible to improve the production efficiency by optimizing the welding time.

  The packaging rice ball of the present embodiment can be obtained by laminating a sheet-like food such as a laver sheet having a substantially rectangular resin film between the front resin film and the back resin film and welding the periphery thereof. In addition, the rice cake lump that has been encapsulated can be taken out, and at the same time a nori sheet kept in a dry state can be wrapped to taste a crisp rice ball.

Example 1
FIG. 1 is a perspective view of a packaging rice ball according to the present embodiment, and FIG. 2 is a front sectional view thereof. Hereinafter, the packaging rice ball will be described more specifically with reference to the drawings.
As shown in FIGS. 1 and 2, the packaging rice ball 10 of the present embodiment has a circular shape inside a substantially box shape formed by folding the four corners of a substantially rectangular resin film 11a and welding its ends. Rectangular package 11 in which the cooked rice lump O is included, spaces 12 to 15 formed with a space with respect to the cooked rice lump O enclosed in the corners of the rectangular package 11, and the rectangular package Affixed to the upper and rear surfaces of the rectangular package 11 corresponding to the strip-shaped easily cut portion 16 provided on the diagonal line connecting the space portions 12, 14 facing each other on the surface and the tab 17 provided at the starting end of the strip-shaped easily cut portion 16. It has a substantially square sealing seal 18 attached.

  The cooked rice lump O is formed into a rice ball having a predetermined shape by putting ingredients such as freshly cooked rice, mixed rice, baked rice, pilaf, etc. into a rotary mold such as a substantially triangular shape or a circular shape and pressing it from above and below. The cooked rice lump O thus formed is pushed up by the downstream discharge portion as the rotary mold rotates, and is supplied to the resin film 11a to be the rectangular package 11 and packaged in a substantially box shape. It is like that.

  The material for the resin film 11a is preferably a resin material excellent in water resistance, oxygen impermeability, tensile strength, transparency, printability, and the like, for example, polypropylene and biaxially stretchable polypropylene. Can be mentioned. Moreover, the composite type thing etc. which laminated | stacked resin with different characteristics, such as a vinylidene chloride, can also be used as needed.

  The rectangular package 11 is formed by folding the four corners of a substantially rectangular resin film 11a and the like so that the whole is box-shaped and welding the end portions thereof. Inside the box-like shape, a disk-shaped or triangular-shaped rice cake lump O is enclosed with spaces 12-15.

  The space portions 12 to 15 are portions formed at intervals of, for example, 5 to 20 mm with respect to the cooked rice lump O inside the four corners of the rectangular package 11 formed by being folded into a box shape. Thereby, the unsealing property at the time of taking out the cooked rice lump O from the packaging rice ball 10 is made favorable. Moreover, the function to maintain the atmosphere of the cooked rice lump O which performs atmosphere control which fills the space parts 12-15 with nitrogen gas etc. and aims at oxidation prevention can also be provided. Furthermore, it is also possible to attach supplementary foods such as pickles, seasonings and the like in the spaces 12 to 15.

  The band-shaped easy cutting part 16 is provided on a diagonal line connecting the space parts 12, 14 facing each other on the surface of the rectangular package 11, and has an area enough to insert, for example, a fingertip when the packaging rice ball 10 is opened. The opening is made large enough to be secured. As shown in FIGS. 1 and 4 in this embodiment, the strip-shaped easy-cut portion 16 is formed by providing a cut tape having a strength greater than the periphery connected to the cut at the end of the film at the center of the substantially rectangular resin film 11a. Thus, the center of the resin film 11a can be cut or divided into left and right. Further, a protruding pull-in tab or string-like body is provided at the starting end position of the band-shaped easy-cutting portion 16 so as to facilitate the gripping of the resin film 11a, and the opening operation of the packaging rice ball 10 is further facilitated by pulling this. I have to. In addition, as the strip | belt-shaped easy cut part 16, it is good also as a strip | belt-shaped part which perforated in the shape of a perforation or formed the predetermined shallow thin part in the surface. In addition, as the shape of the band-shaped easy-cut portion 16, it is assumed that it is formed in a substantially straight line here, but for example, it is formed in a wave shape in which wide portions and narrow portions are alternately formed. Also good.

  The sealing seal 18 is a stamp-like seal made of the same or different kind of resin film as the resin film 11 a of the rectangular package 11. Even if the sealing seal 18 is affixed to the back surface of the rectangular package 11 corresponding to the tab 17 at the starting end of the strip-shaped easy cutting portion 16 and the tab 17 of the strip-shaped easy cutting portion 16 is peeled off somewhat, It has a function to keep O sealed in a sanitary manner.

Next, the packaging method of the packaging rice ball 10 which encloses the cooked rice lump O with the resin film 11a in the cooked rice lump O configured as described above will be described with reference to the drawings. FIG. 3 is an explanatory view of a method of folding a resin film that forms a rectangular package of a packaging rice ball in a box shape, and FIG. 4 is a plan explanatory view of the method of folding the resin film.
As shown in FIG. 3A and FIG. 4, first, the cooked rice mass O manufactured in a disk shape by a rice ball manufacturing apparatus (not shown) is placed on the rice ball lower support member 20. And it arrange | positions so that the rectangular package body 11 which consists of the substantially rectangular resin film 11a may be covered from the upper direction of this cooked rice lump O. FIG. In addition, this resin film 11a is a square shape whose one side is about 25-30 cm, for example, and the film thickness is 20-35 micrometers. The material of the resin film 11a is a heat-meltable plastic such as polyethylene resin, and the film welding temperature is 95 to 205 ° C. and the film welding time is 0 when the end portions of the films having such a film thickness are heat-welded. .6 to 1 second, preferably 0.6 to 0.7 seconds, so that the work efficiency, yield, productivity, etc. in the heat welding process between the resin films can be optimized. Here, when the film welding temperature is lower than 95 ° C., the resin film is not sufficiently melted and the adhesiveness is remarkably deteriorated. Conversely, when it exceeds 205 ° C., the film surface on which the heat member etc. abuts is carbonized or wrinkled. May occur, which is not preferable. On the other hand, if the film welding time is shorter than 0.6 seconds, the film-welded surface cannot be held well. Conversely, if the film welding time is longer than 1 second, the tendency of the production efficiency of the heat welding process to decrease is not preferable.

As shown in the figure, the rice ball lower support member 20 is provided with frame frames projecting at a predetermined height in a U-shape at the left and right ends in the horizontal direction, and the cooked rice mass O can be placed in the center and moved in the vertical direction. It is the member made to do.
Next, the tips of the pair of folding members 21, 22 facing left and right on the horizontal plane of the rice ball lower support member 20 on which the rice ball lump O is placed are positioned between the lower portion of the rice ball lump 50 and the rice ball lower support member 20. (FIG. 3B). By inserting the leading ends of the folding members 21 and 22 so as to be pushed in, the lower part of the resin film 11a is folded and the upper part is shaped into a box shape to form the rectangular packaging body 11, and this rectangular packaging body. The space parts 12-15 which have a predetermined clearance with respect to the cooked rice lump O can be formed in four corners of 11 (refer FIG.3 (c)).
At this time, as shown in FIG. 4, the band-shaped easy cutting part 16 is arranged on a diagonal line connecting the opposing space parts 12, 14, and the tab 17 serving as the starting end of the band-shaped easy cutting part 16 corresponds to the space part 14. To be located.

  And as shown in FIG.3 (d), the cooked rice lump O which each has the space parts 12-15 in the box-shaped four corners formed by folding the resin film 11a of the rectangular package 11 is the folding member 21, The rice ball is lifted upward from the lower support member 20 while being placed on the plate 22. Finally, the heater member 23 set at a predetermined temperature, for example, 95 to 105 ° C. is pressed against the lower end of the rectangular package 11 on which the resin film 11a is stacked (FIG. 3 (e)). Thus, as shown in FIGS. 3 (f) and 4, a packaged rice ball 10 can be formed in which the cooked rice mass O holds the spaces 12 to 15 inside the four corners of the rectangular package 11. That is, as shown in FIG. 4, the band-shaped easy-cut portions 16 are arranged on the diagonal line of the square upper surface of the rectangular package 11 by folding the square-shaped resin film 11 a in the order of (a) to (d). Thus, the packaging rice ball 10 in a state in which the band-shaped easy cutting portion 16 connects the space portion 12 and the space portion 14 is obtained.

Then, the packaging rice ball manufacturing apparatus which manufactures a packaging rice ball is demonstrated.
FIG. 5 is an explanatory diagram of a packaging rice ball manufacturing apparatus that manufactures a substantially disc-shaped packaging rice ball using a resin film, and FIG. 6 is an operation explanatory diagram of a film packaging unit in the packaging rice ball manufacturing apparatus.
In FIG. 5, 30 is a packaged rice ball manufacturing apparatus, 31 is a rice ball supply unit for supplying the rice cake mass O having a substantially disk shape or the like while being intermittently rotated in the receiving unit 31b on the receiving disk 31a, and 32 is a rotation. A film wrapping portion 33 that includes a disk-shaped base portion 32 a to be driven, accommodates the cooked rice lump O supplied from the rice ball supply portion 31 in the folding device 32 b and encloses it in the rectangular package 11, 33 is provided in the film wrapping portion 32. A resin film supply unit 34 for supplying the resin film 11a, is a film surface by heat-sealing the lower part of the rectangular package 11 in which the cooked rice lump O extruded from the film packaging unit 32 is overlaid. A packaging finish provided with a turntable 34a for attaching a label or the like to the packaging, 35 for conveying a packaging rice ball taken out from the packaging finish 34 Conveyor, 36 rice balls supply unit 31 and the film packaging unit 32, the resin film supplying portion 33, the packaging specifications upper 34, an apparatus main body for supporting and conveyor 35.

  The rice ball supply unit 31 includes a receiving disc 31a that rotates in a predetermined intermittent operation, and pressurizes the cooked rice supplied to the receiving recess 31b on the receiving disc 31a with a push plate ram (not shown), Or the like is inserted into a cooked rice lump O such as a disk shape. Note that the receiving disk 31a is intermittently rotated through a control unit (not shown) so as to synchronize with the operations of a film packaging unit 32, a resin film supply unit 33, a packaging finish 34, and a conveyor 35, which will be described later. To be controlled.

  The film packaging unit 32 holds the cooked rice lump O supplied from the rice ball supply unit 31 during the rotational movement of the disk-shaped base unit 32a in the cooked rice storage unit 32c, and puts the resin film 11a around it through the folding device 32b. It is an apparatus for folding into a box shape. As shown in FIG. 6, the folding device 32b includes a pair of left and right folding mold parts 32d and 32e, and an extrusion jig 32c is movable between the folding mold parts 32d and 32e via a drive unit such as an air motor (not shown). It is designed to be inserted.

  The folding device 32b is a device member for folding back the resin film 11a of the rectangular package 11 containing the cooked rice lump O and forming the whole into a substantially rectangular shape (cuboid shape). As described above, the resin film 11a placed on the folding device 32b can be easily and accurately folded. In addition, the lower end surface of the folding device 32b is placed with a predetermined gap with respect to the placement surface of the disk-shaped base portion 32a, and the tips of the folding mold portions 32d and 32e are pushed into the gap. Thus, the lower end of the resin film 11a to be the rectangular package 11 is folded.

  The resin films 11a are supplied one by one from the resin film supply unit 33 via the rice ball supply unit 31 to the upper portion of the folding device 32b into which the cooked rice lump O is inserted. The resin film 11a has a predetermined shape, for example, a rectangular shape having a length of about 240 mm and a width of about 150 mm.

In the packaging finish 34, the packaged rice ball 10 extruded from the film packaging unit 32 is supplied to the rice ball storage unit of the turntable 34a. The turntable 34 a is rotated in synchronization with the intermittent rotation operation of the film packaging unit 32. The turntable 34a is provided with a heater (not shown) or the like for sealing the lower end film overlapping portion of the rectangular package 11 formed in the box shape.
In this way, a single wrapped rice ball 10 in which the cooked rice lump O is incorporated in the rectangular package 11 formed in a box-like shape is sealed from the discharge portion of the turntable 34a via a pusher (not shown). Each is discharged onto the conveyor 35 and transferred to a boxing device or the like.

  The packaging rice ball 10 of the present embodiment can also have a sealing seal 18 attached to the back surface of the rectangular package 11 corresponding to the tab 17 at the starting end of the band-shaped easy-cut portion 16. Thereby, even if the tab 17 which becomes the starting end of the strip-shaped easy cutting part 16 is somewhat peeled off, the airtightness inside the rectangular package 11 formed in a box shape can be maintained, and the cooked rice mass O can be sanitized. Can hold.

  Furthermore, since the resin film 11a is made of a heat-meltable plastic having a predetermined film thickness and a predetermined film welding temperature and a film welding time, the resin film containing the cooked rice cake O is folded into a substantially box shape and stacked. When the ends are heat-welded, the film surface melts stubbornly, the welding jig is excessively pressed against the cooked rice lump, or the temperature is too high for the film thickness to rub the cooked rice lump O. Production with excellent efficiency and cost is possible.

Alternatively, the resin film 11a may be formed by laminating a sheet-like food such as a laver sheet between the front resin film and the back resin film and welding the peripheral edge thereof. You can also enjoy the crisp texture of rice balls wrapped around a dried nori sheet.
In addition, when the resin film has such a two-layer structure, the back resin film is divided into a left back resin film and a right back resin film in the vicinity corresponding to the band-shaped easy-cut portion, and left and right resin films are arranged. It is also possible to arrange so that the opposite ends of the resin film and the right back resin film are overlapped via the folded portion. Thus, it is possible to prevent the evaporation from the cooked rice lump O from being transferred to the laver sheet by the folded portion. Also, in this case, a substantially rectangular laver sheet is laminated between two front and back resin films, the front edge is welded with a predetermined width, and the welded portion longitudinally cut easily so that the front end welded portion is longitudinally cut. By providing the part, the film can be easily separated when the resin film 3 is opened. Thus, an unreasonable load is not applied when the nori sheet is wrapped around the cooked rice lump O contained in the rectangular package 11, and the nori sheet itself, which is a sheet-like food, can be disposed without being damaged.

  The packaged rice ball 10 of the present embodiment is a space formed with a gap with respect to the cooked rice lump O contained inside the corner of the rectangular package 11 formed by folding the resin film 11a into a box shape. The band-shaped easy cutting part 16 is provided on the diagonal connecting the parts 12 and 14. Therefore, when the rectangular package 11 containing the cooked rice lump O is ruptured by using the band-shaped easy-cut portion 16, a space is secured between the resin film and the cooked rice lump so that, for example, a fingertip can be inserted. Therefore, the whole cooked rice cake O does not adhere to the resin film 11a, and the cooked rice cake O can be easily taken out. Moreover, the space parts 12-15 formed in the circumference | surroundings of the cooked rice lump O can also be utilized as arrangement | positioning space of a supplementary foodstuff. Furthermore, the textures and flavors of the encased cooked rice lump O can be effectively maintained as an atmosphere adjustment space arranged in the rectangular package 11 with the space portions 12 to 15.

  As described above, the packaging rice ball of the present invention is provided with a space portion for the cooked rice lump included in the rectangular package formed in a box shape, and the band-shaped easy cutting portion on the diagonal connecting the space portions. The scope of the present invention falls within the scope of the present invention. For example, in the present embodiment, the case where the folding operation of the resin film is performed on the rotary table of the film packaging unit has been described. However, the folding jig is placed on the rotary table at a fixed position on the rotary table, as shown in FIGS. Folding may be performed.

It is a perspective view of the packaging rice ball which concerns on this Embodiment. It is front sectional drawing of the packaging rice ball. It is explanatory drawing of the method of folding a resin film in a box shape. It is plane explanatory drawing of the folding method of a resin film. It is explanatory drawing of a packaging rice ball manufacturing apparatus. It is operation | movement explanatory drawing of the film packaging part in the apparatus. It is explanatory drawing of the rice ball packaging method in a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Packaging rice ball 11 Rectangular package 11a Resin film 12-15 Space part 16 Band-shaped easy cutting part 17 Tab 18 Sealing seal 20 Rice ball lower support member 21, 22 Folding member 23 Heater member 30 Packaging rice ball manufacturing apparatus 31 Rice ball supply part 31a Receipt Disc 31b Storage unit 32 Film packaging unit 32a Disc-shaped base unit 32b Folding device 33 Resin film supply unit 34 Packaging finish 34a Turntable 35 Conveyor 36 Device body O Rice mass

Claims (4)

In a packaged rice ball containing a rice cake lump of a predetermined shape in a rectangular package formed by folding a substantially rectangular resin film into a box shape,
A strip-shaped easiness provided on a diagonal connecting the space formed inside the corner of the rectangular package with a space to the cooked rice lump and the opposing space on the surface of the rectangular package. A packaging rice ball comprising a cutting portion.   The packaged rice ball according to claim 1, wherein a sealing seal having a predetermined shape is attached to the back surface of the rectangular package corresponding to the starting end of the band-shaped easy-cut portion.   The resin film is a heat-meltable plastic having a film thickness of 25 to 35 μm, and is formed into a substantially box shape by folding the four corners of the resin film enclosing the cooked rice lump and heat-welding the stacked ends. The packaging rice ball according to claim 1 or 2, wherein a film welding temperature at the time of forming is 195 to 205 ° C and a film welding time is 0.6 to 0.7 seconds. The packaging according to any one of claims 1 to 3, wherein the resin film is obtained by laminating a sheet-like food between a front resin film and a back resin film and welding the peripheral edge thereof. rice ball.

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