JP5069528B2 - Packaging material and inner film for packaging material - Google Patents

Description

  The present invention relates to a packaging material for packaging cooked rice food and an inner film for the packaging material.

  Conventionally, various packaging materials have been provided for packaging cooked rice processed food that has been processed into chunks. In recent years, cooked rice and sheet foods such as seaweed and thin-cooked eggs have been separated. While being packaged in a state, the mainstream is that the processed rice food and the sheet-like food can be integrated and eaten together when opened.

  As shown in FIGS. 12 and 13, the packaging material is overlaid on the outer film 50 through the sheet-like food B with the outer film 50 configured to be split in the width direction, and is the same as the dividing direction of the outer film 50. And an inner film 51 configured to be separable in the direction. In each figure, a cross-hatched region is a sealed portion or a sealed portion.

  The outer film 50 is generally formed in a lengthwise direction in which a linear or belt-shaped cutting auxiliary means 52 (for example, a cut tape) for cutting (dividing) the outer film 50 at the center in the width direction is perpendicular to the width direction. A gripping portion 53 including the cutting assisting means 52 is formed at least at one end portion in the lengthwise direction while being provided over the entire length. As a result, the outer film 50 is in a state where the end of the cutting assisting means 52 is also gripped when the gripping portion 53 is gripped, and is guided to the cutting assisting means 52 by pulling the gripping portion 53. While being cut in the length direction, it can be divided into two in the width direction.

  On the other hand, the inner film 51 is mainly composed of two films arranged in parallel in the width direction so that they can be separated in the same direction as the outer film 50 when opened (see, for example, Patent Document 1). Then, the moisture of the cooked rice processed food A reaches the sheet-like food B through the gap between the two films, and the taste and texture of the sheet-like food B are reduced. A break assisting means 54 such as a half cut or a perforation extending linearly in a length direction orthogonal to the direction is formed, and the break assisting means 54 breaks to provide a separation in the width direction. It's getting on.

  In the state where the cooked rice processed food A is arranged on the inner film 51, the packaging material having the above configuration is folded in half in the length direction and heat-sealed opposite ends, so that the cooked rice processed food A and the sheet-shaped food are B can be packaged with the inner film 51 separated.

The packaging material is obtained by cutting the outer film 50 in the length direction and pulling it in the width direction, thereby separating the outer film 50 divided into two in the width direction, and the inner film 51 by the break assisting means 54. They are ruptured and separated (separated) in the width direction. As a result, the inner film 51 (two films) is pulled out from between the sheet-shaped food B and the cooked rice processed food A, and the sheet-shaped food B and the cooked rice processed food A are integrally eaten together with opening. It is supposed to be ready for.
Japanese Patent Laid-Open No. 08-242789

  However, as shown in FIG. 14, the packaging material having the above-described structure has a pulling force F necessary for breaking the inner film 51 with the break assisting means 54 and a pulling force necessary for pulling out the inner film 51 (processed rice cooked food). When applying F (a pulling force superior to the contact resistance between A and the inner film 51) F, the forces Fa and Fa that sandwich the cooked rice processed food A by the inner film 51 facing each other by folding in two greatly act, and the cooked rice processed food There is a problem that A cracks or loses its shape. In other words, the packaging material having the above-described configuration is such that the inner film 51 between the pulling position (point of action) Pa and the contact point Pb of the inner film 51 with the cooked rice processed food A with respect to the acting direction of the pulling force F at the time of opening. Since the angle α ° is increased, the force Fa, Fa (the component force Fa of the force Fb acting in the direction opposite to the pulling force F at the contact point Pb) between the opposed inner film 51 is greatly applied. As a result, the inner film 51 is pulled out, and the cooked rice processed food A is out of shape or cracked when opened.

  In particular, when the cooked rice A is a triangular rice ball, the corners are portions that are prone to mold deformation and cracking. Therefore, when the pinching by the inner film 51 occurs as described above, the corner deformation and cracking of the triangular rice balls are prominent. is there.

  Specifically, there is usually a wide portion (between two corners) of a triangular rice ball in the folded portion of the packaging material folded in half in the length direction. For this reason, the distance between the pulling action point Pa and the contact point Pb that contacts the corner of the triangular rice ball in the inner film 51 is the shortest, and the angle α ° with respect to the acting direction of the pulling force F is maximized, The force Fa which pinches | interposes the triangular rice ball (corner | corner part) of the inner film 51 at the time of pulling a packaging material in the width direction becomes large.

  As a result, the corners of the triangular rice ball are sandwiched between the inner film 51 by generating a large force Fa, Fa in spite of being easily deformed or cracked, and are triangular when pulled in the width direction. Distortion and cracks at the corners of the rice balls become prominent.

  Further, since the same force acts on the outer film 50, the sheet-like food B interposed between the outer film 50 and the inner film 51 is pulled while being sandwiched between these films 50 and 51. There was a problem that the sheet-like food B will be torn.

  Accordingly, in view of such circumstances, the present invention provides a packaging material that can prevent the cooked rice food from being deformed at the time of opening or the sheet-like food from being torn, and an inner film for the packaging material. The task is to do.

The packaging material according to the present invention is overlapped with the outer film configured to be splittable in the width direction and the outer film via the sheet-like food, and is linear over the entire length in the length direction orthogonal to the width direction. A break assisting means extending in the direction is formed, and includes an inner film configured to be separable in the same direction as the outer film by being broken by the break assisting means, and facing each other by folding the whole in half in the length direction In the packaging material configured to seal the end portions and wrap the cooked rice processed food, the inner film is formed on the center film portion on which the break assisting means is formed and on both side ends in the width direction of the center film portion. is continuously provided, comprising a pair of extension film portion which is expandable configured in the width direction, a pair of side film portion extending outward in the width direction from the tip of each extension film portion, the extension film unit, At least a folded portion composed of an inwardly extending piece extending from the outer side in the width direction toward the inner side on the side of the food product and an outwardly extending piece extending from the tip of the inward piece to the outer side in the width direction The center film portion, the expansion film portion, and the side film portion are integrally formed by bending a single film so as to form a ridge line extending in the same direction as the break assisting means . It is characterized by that.

  According to the packaging material having the above-described configuration, the inner film includes a center film portion in which breakage assisting means is formed, a pair of expansion film portions that are connected to both side ends in the width direction of the center film portion, and each expansion film portion. A pair of side film portions extending outward in the width direction from the front end of the film, so that when the outer film is divided in the width direction and pulled in the width direction, the divided outer film is separated, In the inner film, the extended film portion spreads in the width direction.

  Then, as a result of the distance between the pulling action point (the end in the width direction of the packaging material) and the contact point with the cooked rice processed food in the inner film, the action of the pulling action against the action direction of the pulling force at the time of opening The angle of the inner film between the point and the contact point of the inner film with the cooked rice processed food is reduced.

  As a result, even if a tensile force is applied in the width direction to break the inner film with the break assisting means or to pull out the inner film, the cooked rice processed food is sandwiched at the contact point of the inner film with the cooked rice processed food. As a result, the inner film is not pulled out while sandwiching the processed rice food while applying a large force, and the processed rice food is prevented from being deformed or cracked.

  Also, when the break assisting means is broken or when the inner film is pulled out, the divided outer film is already in a separated state, so that the outer film and the sheet-like food have little or no overlap. It becomes. Thereby, when pulling out an inner film, a sheet-like food is not pulled forcibly in the width direction, and it is suppressed that a sheet-like food is torn at the time of opening.

Then, according to the packaging material having the above-described configuration , the inward piece portions are folded back in order from the distal end side to the outward piece portion side by the action of the tensile force in the width direction, and the expansion film portion is expanded in the width direction. A center film part, an extended film part (folding part), and a side film part will be in the state located in a line. As a result, the inner film spreads in the width direction as the divided outer films are separated from each other, so the angle of the inner film between the pulling action point and the contact point of the inner film with the cooked rice processed food is reduced. Moreover, the force which acts so that this cooked rice processed food may be pinched | interposed in the contact point with respect to the cooked rice processed food in an inner film can be made small.

Furthermore, according to the packaging material having the above-described configuration, an inner film in which the above-described action is generated can be produced without obtaining a complicated process such as bonding the films. In addition, when one film is bent so as to form a ridgeline, when the expansion film part expands (when the inward piece part is folded back) as described above, the boundary between the inward piece part and the outward piece part is formed. Since the formed ridgeline moves in the inward piece, the inner film can be expanded smoothly.

  And it is preferable that the said fracture | rupture auxiliary | assistance means is comprised by the half cut formed in the non-penetrating state. In this way, the inner film can be easily separated, and the portion where the cooked rice food side and the sheet food side communicate is not formed at all, so the moisture of the cooked rice food reaches the sheet food. Can be surely prevented.

And the inner film for packaging materials according to the present invention is configured so that it can be separated in the same direction as the outer film, overlaid on the outer film via the outer film configured to be divided in the width direction and the sheet-like food. An inner film for packaging material, which is configured to wrap the whole in half in the length direction perpendicular to the width direction and seal the opposing ends to wrap the cooked rice food The center film portion is formed with breakage assisting means extending linearly over the entire length in the length direction, and is connected to both ends in the width direction of the center film portion, and is configured to be expandable in the width direction. A pair of extended film portions and a pair of side film portions extending outward in the width direction from the distal ends of the respective extended film portions, each extending film portion extending inwardly from the outer side in the width direction. And the inside And at least one folded portion composed of an outwardly extending piece extending outward in the width direction from the tip of the piece, wherein the center film portion, the extension film portion, and the side film portion are the same as the break assisting means. It is characterized by being integrally formed by bending a single film so as to form a ridge line extending in the direction .

  According to the inner film for a packaging material having the above-described configuration, the center film portion on which the break assisting means is formed, the pair of extension film portions provided continuously on both side ends in the width direction of the center film portion, and each extension film portion A pair of side film portions extending outward in the width direction from the front end of the film, so that when the outer film is divided in the width direction and pulled in the width direction on the outer film as a packaging material, As the divided outer films are separated from each other, the expansion film portion spreads in the width direction in the inner film.

  Then, as a result of the distance between the pulling action point (the end in the width direction of the packaging material) and the contact point with the cooked rice processed food in the inner film, the action of the pulling action against the action direction of the pulling force at the time of opening The angle of the inner film between the point and the contact point of the inner film with the cooked rice processed food is reduced.

  As a result, even if a tensile force is applied in the width direction to break the inner film with the break assisting means or to pull out the inner film, the cooked rice processed food is sandwiched at the contact point of the inner film with the cooked rice processed food. As a result, the inner film is not pulled out while sandwiching the processed rice food while applying a large force, and the processed rice food is prevented from being deformed or cracked.

  Also, when the break assisting means is broken or when the inner film is pulled out, the divided outer film is already in a separated state, so that the outer film and the sheet-like food have little or no overlap. It becomes. Thereby, when pulling out an inner film, a sheet-like food is not pulled forcibly in the width direction, and it is suppressed that a sheet-like food is torn at the time of opening.

According to the inner film for a packaging material having the above-described configuration , the inward strips are folded back from the distal end side to the outward strip portion side by the action of the tensile force in the width direction, and the expansion film portion is expanded in the width direction. Finally, the center film part, the extended film part (folded part), and the side film part are arranged in a line. As a result, the inner film spreads in the width direction as the divided outer films are separated from each other, so the angle of the inner film between the pulling action point and the contact point of the inner film with the cooked rice processed food is reduced. Moreover, the force which acts so that this cooked rice processed food may be pinched | interposed in the contact point with respect to the cooked rice processed food in an inner film can be made small.

Furthermore, according to the inner film for a packaging material having the above-described configuration, an inner film in which the above-described action is produced can be produced without obtaining a complicated process such as bonding the films. In addition, when one film is bent so as to form a ridgeline, when the expansion film part expands (when the inward piece part is folded back) as described above, the boundary between the inward piece part and the outward piece part is formed. Since the formed ridgeline moves in the inward piece, the inner film can be expanded smoothly.

  And it is preferable that the said fracture | rupture auxiliary | assistance means is comprised by the half cut formed in the non-penetrating state. In this way, the inner film can be easily separated, and the portion where the cooked rice food side and the sheet food side communicate is not formed at all, so the moisture of the cooked rice food reaches the sheet food. Can be surely prevented.

  As described above, according to the packaging material and the inner film for packaging material according to the present invention, it is possible to prevent the cooked rice processed food from being deformed at the time of opening or the sheet-like food from being broken. The effects can be achieved.

  Hereinafter, a packaging material according to an embodiment of the present invention will be described with reference to the accompanying drawings.

  As shown in FIG. 1, the packaging material according to the present embodiment includes processed rice foods such as rice balls and sushi (triangle rice balls in the present embodiment) A, and sheets such as laver, thin-cooked eggs, and tatami mats. The packaged food (in this embodiment, laver) B is packaged in a separated state, and is configured to be splittable in the width direction as shown in FIGS. 2, 3 (a), and 3 (b). The outer film 10 and the inner film 20 are provided so as to be separated from each other in the same direction as the dividing direction of the outer film 10. The packaging material 1 is configured so that the outer film 10 and the inner film 20 are sealed so as to surround the sheet-like food B, and the cooked rice A is wrapped with the inner film 20 inside (see FIG. 1). . In each figure, a cross-hatched region is a sealed portion or a sealed portion.

  The outer film 10 according to the present embodiment is formed in a substantially rectangular shape in plan view, and is configured to be divisible in a short direction (width direction) perpendicular to the longitudinal direction (length direction). More specifically, the outer film 10 is provided with cutting auxiliary means 100a and 100b extending linearly or in a strip shape over the entire length in the length direction. In the present embodiment, the cutting assisting means 100 a and 100 b are provided in two strips at intervals in the width direction of the outer film 10.

  Each of the cutting assistance means 100a, 100b is continuously provided over the entire length of the outer film 10, and in this embodiment, a strip-shaped cut tape attached to the outer film 10. It consists of

  The two cut tapes 100a and 100b are provided so as to be symmetric with respect to a center line CL extending in the length direction of the outer film 10, and are separated from each other at least in part in the length direction of the outer film 10. Thus, an enlarged portion 101 is formed with an increased interval.

  When the packaging material 1 according to the present embodiment wraps the cooked rice processed food A with the inner film 20 inside, the outer film 10 and the inner film 20 in a laminated state are folded in half in the length direction of the outer film 10. The two ends of the cut tape 100a, 100b are formed so as to form the enlarged portion 101 at a substantially central position in the length direction. Is provided.

  That is, in the present embodiment, the two cut tapes 100a and 100b are provided so as to have a minimum interval at both ends in the length direction of the outer film 10, and from the both ends in the length direction of the outer film 10. An interval is gradually enlarged toward the center, and an enlarged portion 101 having a maximum interval is formed at the central portion in the length direction.

  The outer film 10 is provided with a gripping portion 102 that straddles the two cut tapes 100a and 100b at at least one end in the length direction. The outer film 10 according to the present embodiment is provided with a pair of cut portions 103 and 103 so that two strips of tape 100a and 100b are interposed at both ends in the length direction, and the pair of cut portions 103. , 103 is formed with a gripping portion 102. Further, at both ends in the length direction of the outer film 10, the center portion (between the cut portions 103 and 103) is cut out to form outer cutout portions 104 and 104. The outer cutouts 104 and 104 are formed by cutting together the laminated outer film 10 when forming the cutout cutouts 201 and 201 to be described later on the inner film 20.

  As described above, the outer film 10 according to the present embodiment is formed by folding the outer film 10 and the inner film 20 in half and sealing the ends facing each other in the center in the length direction of both side ends. The outer notch portions (V cuts) 105 and 105 for folding are formed by cutting out the portions.

  The inner film (inner film for packaging material) 20 is formed in a substantially rectangular shape in plan view like the outer film 10, and is set to be approximately the same size as the outer film 10. The inner film 20 is composed of a single film, and is provided with linear break assisting means 200 extending over the entire length in the longitudinal direction.

  In the present embodiment, the cut assisting means 200 employs a half cut. Thereby, the inner film 20 is separated (divided) in the width direction by being broken (broken) by the half cut 200. The half cut 200 is formed to extend linearly at a portion thinner than the surrounding thickness in order to weaken the strength locally. In the present embodiment, the half cut 200 extends over the entire length in the length direction of the inner film 20. It is formed in a straight line. The half cut 200 is formed by melting the film in a line or embossing it so as to be in a non-penetrating state.

  As shown in FIG. 4, the inner film 20 according to the present embodiment is connected to the center film portion 20 a on which the half cut (breaking assisting means) 200 is formed, and to both ends in the width direction of the center film portion 20 a. A pair of expansion film portions 20b, 20b configured to be expandable in the width direction, and a pair of side film portions 20c, 20c extending outward in the width direction from the ends of the expansion film portions 20b, 20b are provided.

  The center film portion 20a is formed in a rectangular shape, and the half cut 200 is formed to extend in the longitudinal direction. In the present embodiment, the center film portion 20a has the half cut 200 formed at the center position in the width direction (short direction perpendicular to the longitudinal direction), and the regions on both sides thereof are symmetrical with respect to the half cut 200. It is formed to become.

  The pair of extended film portions 20b and 20b extend inwardly in the widthwise direction from the tip of the inwardly facing piece portion 211 to the inwardly facing portion 211 on the sheet-like food B side. And at least one folded portion 210 including the outwardly facing piece portion 212. In this embodiment, each expansion film part 20b, 20b is provided with one folding part 210.

  The folded portion 210 has an inward piece portion 211 and an outward piece portion 212 each having a band shape, and each of the inward piece portion 211 and the outward piece portion 212 is connected to each other with one side end extending in the longitudinal direction. The other side end of the inward piece portion 211 is connected to the side end of the center film portion 20a, and the other side end of the outward piece portion 212 is connected to the side film portion 20c. The inner film 20 according to the present embodiment is formed by bending a single film so as to form ridge lines La and Lb extending in the same direction as the half cut 200, and includes a center film portion 20a and an expansion film portion. A first ridge line La is formed at the boundary with 20b (inwardly facing piece portion 211), and a second ridgeline Lb is formed at the folded portion 210 (boundary between the inwardly facing piece portion 211 and the outwardly facing piece portion 212). .

  And the folding | returning part 210 (inward piece part 211 and outward piece part 212) of each expansion film part 20b and 20b is set shorter than the half of the length of the width direction of the center film part 20a. That is, the size (length) of the folded portion 210 (the inward piece portion 211 and the outward piece portion 212) is set so that the other extended film portion 20b does not overlap the one extended film portion 20b.

  The pair of side film portions 20c and 20c are each formed in a rectangular shape, and one side end (base end) extending in the longitudinal direction is the tip of the extension film portions 20b and 20b (tip of the outward piece portion 212 (the other end) Is connected to the side edge)). And a pair of side film part 20c, 20c is formed so that each other side end (front-end | tip) may become the both ends of the width direction of the inner film 20. As shown in FIG.

  Returning to FIG. 2, FIG. 3 (a) and FIG. 3 (b), the inner film 20 according to the present embodiment has a notch portion for breaking (notch portion) corresponding to the arrangement of the half-cuts 200 at both ends in the length direction. ) 201, 201 are provided. The breaking notches 201 and 201 may be formed so as to be recessed inward (center side of the inner film 20) with respect to an edge that extends straight in the width direction of the inner film 20. It is formed in a circular shape.

  And as above-mentioned, also about this inner film 20, the center part of the length direction of a both-sides edge part assumes the packaging form which folds the outer film 10 and the inner film 20, and seals the edge parts which mutually oppose each other. Are notched to form inner notch portions (V cuts) 202, 202 for folding. In the present embodiment, the inner film 20 and the outer film 10 are set to have substantially the same size, and the inner notch portion 202 for folding of the inner film 20 is premised on the assumption that the outer peripheral ends of the inner film 20 overlap each other. , 202 are set in an arrangement and shape corresponding to the outer cutout portions 105, 105 for folding of the outer film 10.

  And the packaging material 1 which concerns on this embodiment, after laminating | stacking the inner film 20 and the outer film 10 via the sheet-like food B, the outer film 10 and the inner film 20 so that the sheet-like food B may be surrounded. Is sealed. It should be noted that at both ends in the length direction of the gripping portion 102, the gripping portion 102 is sealed inside the gripping portion 102 (the pair of cut portions 103, 103) so as to hold the gripping portion 102. Thereby, the outer film 10 is opposed to the inner film 20 so as to intersect with the two cut tapes 100a, 100b provided over the entire length in the length direction of the outer film 10 at both ends in the length direction. Are sealed. Moreover, the inner film 20 is sealed with respect to the outer film 10 so that it may cross | intersect with respect to the 1st ridgeline La and the 2nd ridgeline Lb in the both ends of a length direction, and the folding | returning part 200 is accompanied by this. (Expansion film part 20b) is sealed by center film part 20a.

  The packaging material 1 which concerns on this embodiment consists of the above structures, and is produced by cut | disconnecting the raw material for packaging materials in which this packaging material 1 continues two or more to predetermined length. Specifically, as shown in FIG. 5A, for a long film F1 set to a width corresponding to the width of the outer film 10, two strips of tape (continuous body of cut tapes 100a and 100b) 100a ′, 100b 'is stuck continuously in the longitudinal direction. At this time, when the two long tapes 100a ′ and 100b ′ pass in a predetermined position while moving in the same direction with respect to the long film F1 moving in the longitudinal direction, the transverse direction perpendicular to the longitudinal direction is used. It is stuck while contacting and separating from each other. In this way, by sticking the two tapes 100a 'and 100b' to the long film F1, an outer film original fabric 10 'which is a continuous body of the outer film 10 is produced.

  On the other hand, as shown in FIG. 5B, a half cut 200 ′ extending in the longitudinal direction is formed on the long film F2 set to a width corresponding to the width of the inner film 20, and the half cut 200 ′. The long film F2 is bent so as to form ridge lines La ′ (La...), Lb ′ (La...) Extending in the same direction as the inner direction, and an inner film original fabric 20 ′ that is a continuous body of the inner film 20 is produced. Is done. That is, by cutting the long film F2 formed with the half cut 200 ′ in the short direction so as to form ridge lines La ′ (La...), Lb ′ (La...) Extending in the longitudinal direction, the half cut 200 ′. Is formed in the longitudinal direction, and is continuous with the center band portion 20a ′ (20a...) That becomes a continuous portion of the center film portion 20a, and both ends (both ends in the short direction) of the center band portion 20a ′. A pair of extended portions 20b ′, 20b ′ (20b..., 20b...) That are continuous portions of the extended film portions 20b, 20b and the tips (short direction) of the extended portions 20b ′, 20b ′ (20b. A pair of side band portions 20c ′, 20c ′ (20c..., 20c...) Which are extended toward the outside in the short-side direction and become continuous portions of the side film portions 20c, 20c. It was among the film original sheet for 20 'is produced.

  Then, as shown in FIG. 6, the inner film original fabric 20 ′ is superimposed on the outer film original fabric 10 ′ via the sheet-like food B. That is, when the inner film original fabric 20 ′ is overlapped with the outer film original fabric 10 ′, the outer film original fabric 10 ′ and the inner film original fabric 20 ′ are supplied in the longitudinal direction, and at predetermined intervals. While feeding the sheet-like food B having a rectangular shape in plan view onto either the outer film raw fabric 10 'or the inner film raw fabric 20', the outer film raw material B is sandwiched between the sheet-shaped food B. The anti 10 'and the inner film original 20' are overlapped.

  At this time, the sheet-like food B has the longitudinal direction aligned with the longitudinal direction of the outer film original fabric 10 'and the inner film original fabric 20' (long films F1, F2), and two tapes 100a ', 100b. Either the outer film original fabric 10 ′ or the inner film original fabric 20 ′ so that the substantially central position in the longitudinal direction corresponds to the position where the interval of “maximum” (the position that becomes the enlarged portion 101 of the packaging material 1) corresponds. Supplied on one side.

  Then, the outer film original fabric 10 ′ and the inner film original fabric 20 ′ are sealed so as to surround each sheet-like food B, and a packaging material original 1 ′ that is a continuous body of the packaging material 1 is produced. The packaging material 1 having the above-described configuration is sequentially manufactured by cutting the packaging material 1 ′ with a predetermined length (cutting between the sheet-like foods B and B).

  And in order to package the cooked rice processed food A with the packaging material 1 of the said structure, as shown to Fig.7 (a), first, the cooked rice processed food A is arrange | positioned on the inner film 20, and it shows in FIG.7 (b). Thus, the packaging material 1 (the outer film 10 and the inner film 20) is folded in half in the length direction. In this state, the region corresponding to the enlarged portion 101 (the region between the outer notch portions for folding 105 and 105 and the region between the inner notch portions for folding 202 and 202) stands up corresponding to the thickness of the cooked rice processed food A Then, both sides of the region are in a state of being opposed to each other through the cooked rice processed food A.

  After that, as shown in FIG. 7 (c), the two side end portions in the width direction facing each other are folded and folded to overlap each other side end portion as shown in FIG. 7 (c). Seal.

  In this state, both ends in the length direction form an opening, and both ends of the center position in the length direction of the outer film 10 and the inner film 20 (the outer notch portions 105 and 105 for folding and the inner notch portion 202 for folding). , 202 corresponds to a triangular projecting piece by folding the side end. In addition, the packaging material 1 which concerns on this embodiment provides the outer notch parts 105 and 105 for folding, and the inner notch parts 202 and 202 for folding in the both-sides edge part of the center position of the outer film 10 and the inner film 20 in the length direction. Therefore, a good-looking protrusion is formed without performing unnecessary folding on the portion.

  And as shown in FIG.7 (d), the both ends of the length direction of the outer film 10 and the inner film 20 in which the opening was formed so that the holding part 102 may be held inside the holding part 102 (a cooked rice processed food) A) The opening is closed by sealing in a linear or belt shape on the side. Thereby, the state which interposed the inner film 20 between the sheet-like food B and the cooked rice processed food A, ie, the sheet-like food B and the cooked rice processed food A, are packaged in a separated state.

  And in order to open the packaging material 1 which wrapped the cooked rice processed food A in the said aspect, as shown to Fig.8 (a), it pulls the outer film 10 in the length direction with the holding part 102, and the outer film 10 Is cut in the length direction. At this time, the outer film 10 is cut (broken) while being guided by the two cut tapes 100a and 100b. As a result, as shown in FIG. The region is excised over its entire length. That is, the outer film 10 corresponds to the manner in which the cut tapes 100a and 100b are attached, and the part to be cut is enlarged toward the center position side in the length direction (folded part by bi-folding). It opens to the maximum in the corresponding part. Thereby, the part by which the sheet-like food B was pinched | interposed into the outer film 10 and the inner film 20 will be in the state reduced.

  And the packaging material 1 of this embodiment is the center film in which the expansion film part 20b (folding part 200) located in the seal | sticker part is the inner film 20 sealed by the both ends of a length direction at linear or strip | belt shape. Since it is integrated with the portion 20a in an overlapped state, as shown in FIG. 8 (c), the widths of both ends of the outer film 10 and the inner film 20 in the length direction (both ends overlapped) are widened. When pulled in the direction, the pulling force acts intensively on the breaking notches 201 and 201 provided at both ends in the length direction of the inner film 20.

  In this case, the half cut 200 forms a groove and stress (force) acts intensively. Further, since the thickness of the portion corresponding to the half cut 200 is thinner than the surrounding thickness and is weak, The tensile force concentrated on the notches 201 and 201 acts on the half cut 200 in a concentrated manner, and the portion starts to break (starts to tear).

  And since the expansion film part 20b other than the part sealed by the both ends of the length direction is the state which only overlapped with the center film part 20a, when it continues pulling the packaging material 1 to the width direction, Fig.9 (a) As shown in FIG. 9C, the pulling force F causes the outer film 10 divided into two parts to be separated, while the expansion film portion 20b of the inner film 20 is expanded in the width direction without breaking the half cut 200. become. That is, when the packaging material 1 is pulled in the width direction, the inward piece portion 211 of the expansion film portion 20b (folded portion 210) is pulled by the outward piece portion 212 as the divided outer film 10 is separated. It will be folded back in order from the side to the outside in the width direction. In the present embodiment, since the second ridge line Lb is formed at the boundary between the inward piece portion 211 and the outward piece portion 211 by bending the film, the second ridge line Lb is on the first ridge line La side. In such a manner that the inwardly directed piece 211 falls from the center film portion 20a in such a manner as to shift to the above.

  As a result, in the inner film 20, the extended film portion 20b is stretched, and the center film portion 20a, the extended film portions 20b and 20b, and the side film portions 20c and 20c are arranged in a line. Then, as shown in FIG. 10, the angle α ° of the inner film 20 between the acting point Pa of the pulling force F and the contact point Pb of the inner film 51 with the cooked rice processed food A with respect to the acting direction of the pulling force F at the time of opening. Becomes smaller. Accordingly, even if the tensile force F is applied in the width direction in order to break the inner film 20 with the half cut 200, or the tensile force F is applied in the width direction in order to pull out the broken inner film 20, the contact point As a result, the forces Fa and Fa acting to sandwich the cooked rice A with Pb (component force Fa acting in the direction orthogonal to the force Fb acting in the opposite direction to the tensile force F at the contact point Pb) are reduced. The film 20 is not pulled out in a state where the cooked rice processed food A is sandwiched while exerting a large force, and the cooked rice processed food is prevented from being deformed or cracked.

  Further, when the inner film 20 is broken by the half cut 200 or when the inner film 20 is pulled out, the divided outer film 10 is already separated, and there is little or no area facing the sheet-like food B. It becomes difficult to be pulled in the width direction in a state where the sheet-like food B is sandwiched between the outer film 10 and the inner film 20, and the sheet-like food B is also prevented from being torn.

  And as shown in FIG.8 (d), the inner film 20 interposed between the cooked rice processed food A and the sheet-like food B is pulled out, and the cooked rice processed food A and the sheet-like food B are integrated, and these Will be ready to eat.

  As described above, according to the packaging material 1 according to the present embodiment, the inner film (inner film for packaging material) 20 superimposed on the outer film 10 is the center film portion 20a in which the break assisting means 200 is formed. And a pair of extended film portions 20b, 20b connected to both side ends in the width direction of the center film portion 20a, and a pair of side film portions 20c extending outward in the width direction from the tips of the extended film portions 20b, 20b. 20c, when the outer film 10 is divided in the width direction and pulled in the width direction, the inner film 20 is expanded in the width direction as the divided outer film 10 is separated. The distance between the action point Pa (the end in the width direction of the packaging material) and the contact point Pb with the cooked rice processed food A in the inner film 20 can be increased. In particular, since the packaging material 1 according to the present embodiment is provided with the folded portion 210 having the inward piece portion 211 and the outward piece portion 212 in the extended film portion 20b, the inner film 20 is smoothly expanded in the width direction. be able to.

  Thereby, even if a tensile force is applied in the width direction in order to break the inner film 20 with the break assisting means 200, the inner film 20 is pulled out while sandwiching the cooked rice processed food A while applying a large force. It is suppressed that the cooked rice processed food A is out of shape or cracked. This is particularly useful when the cooked rice processed food A is a triangular rice ball having corners that are prone to die and cracks.

  Further, when the break assisting means 200 is broken or when the inner film 20 is pulled out, the divided outer film 10 is already separated, so that there is little or no overlap with the sheet-like food B. It is possible to prevent the sheet-like food B from being torn when opened.

  Further, the center film portion 20a, the expansion film portion 20b, and the side film portion 20c are integrally formed by bending a single film so as to form ridge lines La and Lb extending in the same direction as the break assisting means 200. Therefore, the inner film 20 in which the above-described action occurs can be produced without obtaining a complicated process such as bonding the films. Further, when one film is bent so as to form the ridge lines La and Lb, when the expansion film portion 20b is expanded as described above (when the inward piece portion 211 is folded back), the inward piece portion 211 and the outward direction are formed. Since the ridge line Lb formed at the boundary with the piece 212 moves in the inward piece 211, the inner film 20 can be smoothly expanded.

  And since the said fracture | rupture auxiliary | assistant means 200 is comprised by the half cut formed in the non-penetrating state with respect to the inner film 20, the inner film 20 can be isolate | separated more smoothly. In addition, since the portion where the processed cooked food A side and the sheet-shaped food B side communicate with each other is not formed, it is possible to reliably prevent the moisture of the processed rice food A from reaching the sheet-shaped food B. The original taste and texture of the food product B can be tasted.

  In addition, this invention is not limited to the said embodiment, Of course, a various change can be added in the range which does not deviate from the summary of this invention.

  In the above embodiment, half-cutting is adopted as the breakage assisting means 200. However, the present invention is not limited to this. For example, the breakage assisting means 200 may be formed by perforations. In this case, considering the passage of moisture in the cooked rice processed food A, it is preferable to make the perforation fine so that moisture does not easily pass through. Needless to say, in order to completely block the moisture of the cooked rice processed food A with the inner film 20, it is preferable to configure the break assisting means 200 by a half-cut in a non-penetrating state as in the above embodiment.

  In the above embodiment, one folded portion 210 is provided in each of the pair of extended film portions 20b, 20b. However, the present invention is not limited to this. For example, as shown in FIG. The folded portion 210 may be formed continuously. Even if it does in this way, as a result of the expansion film part 20b expanding (stretching) by pulling the packaging material 1 in the width direction, the gripped portion (the pulling action point Pa) and the cooked rice processed food A in the inner film 20 Since the distance with respect to the contact point Pb becomes longer, the force to sandwich the cooked rice processed food A at the time of opening is reduced, and the cooked rice processed food A is prevented from being deformed or cracked. Further, when the inner film 20 is broken (separated) by half-cutting or when the separated inner film 20 is pulled out, the divided outer film 10 is already separated and the overlap with the sheet-like food B is small or overlapped. Since there is no state, the sheet-like food B is not pulled in the width direction while being sandwiched between the outer film 10 and the inner film 20, and the sheet-like food B is also prevented from being torn.

  In the above embodiment, the inner film 20 including the center film part 210, the extension film part 20b, and the side film part 20c is produced by bending a single film, but the present invention is limited to this. For example, the center film part 210, the expansion film part 20b, and the side film part 20c are formed of separate films, and these are connected (for example, heat sealing, fusing, etc.) to form one inner film 20. May be. However, if the film is connected in this way, the degree of freedom at the connection portion is reduced, and the probability of being caught in the periphery or hindering deformation is increased, so that one film is bent as in the above embodiment. Is preferred.

  In the said embodiment, although the size of the folding | returning part 210 (inward piece part 211 and outward piece part 212) was set so that a pair of expansion film parts 20b and 20b may not overlap, it is not limited to this, For example, the pair of expansion film portions 20b and 20b may naturally overlap at the center portion of the center film portion 20a. However, when the expansion film portions 20b and 20b overlap, the thickness of the portion increases, making it difficult to fold in half during packaging, or sealing to close the openings formed at both ends in the length direction during packaging. Since it becomes difficult to weld, it is preferable to form the expansion films 20b and 20b in such a manner that the thickness is as thin as possible as in the above embodiment.

  In the embodiment described above, two cut tapes 100a and 100b are provided in a wave shape as an auxiliary cutting means for the outer film 10 in order to divide the outer film 10 in the width direction, and the interval between the cut tapes 100a and 100b is long. The enlarged portion 101 having the maximum interval is formed at the central portion in the direction. However, the present invention is not limited to this. For example, the two cut tapes 100a and 100b may be provided straight and in parallel. Of course, a cut tape of a book may be provided as a cutting auxiliary means.

  In the above embodiment, the outer film original fabric 10 ′ and the inner film original fabric 20 ′ are sealed to form a packaging material original fabric 1 ′, and then the packaging material 1 is cut into a predetermined length in the longitudinal direction. However, the present invention is not limited to this. For example, the outer film 10 'and the inner film 20' are cut in advance to separate the outer film 10 and the inner film 20 from each other. Of course, the outer film 10 and the inner film 20 may be sealed to produce the packaging material 1. Further, the inner film 20 'is cut in advance to produce the inner film 20, the inner film 20 is sealed against the outer film 10', and the outer film 10 'is cut. Of course, the packaging material 1 may be produced. Of course, the reverse is also possible.

  In the said embodiment, although it comprised so that it could expand in the width direction by providing the folding | returning part 200 in the expansion film part 20b of the inner film 20, for example, the center film part 20a, the expansion film part 20b, and the side film 20c are each independent. In addition, the extended film portion 20b employs a film that is highly stretchable with respect to tension, and the center film portion 20a, the extended film portion 20b, and the side film 20c are arranged in parallel in the width direction. The inner film 20 may be formed by connection. Even if it does in this way, since the expansion film part 20b will extend and expand in the width direction when it pulls in the width direction, the force in which the inner film 20 pinches the cooked rice processed food A with the same action as the above embodiment Fa and Fa can be made small, and the shape loss and cracking of cooked rice processed food A can be suppressed.

  In this case, among the center film part 20a, the extended film part 20b, and the side film 20c that are continuously arranged side by side, the extended film part 20b extends in the width direction, so that the extended film part 20b contacts the cooked rice processed food A. If it does, there is a possibility that a tensile force acts on the cooked rice processed food A at the time of expansion to generate a shape loss or the like. Therefore, it is preferable that the expanded film portion 20b is disposed so as to fold the packaged cooked rice processed food A. . However, if the center film portion 20a, the extended film portion 20b, and the side film 20c are formed of independent films, the step of connecting the films is required, and the inner film 20 can be made of a single material. Since it cannot do, it is preferable to produce the inner film 20 by bending one film like the said embodiment from a viewpoint of manufacturing cost.

The perspective view of the state which packaged the cooked rice processed food with the packaging material which concerns on one Embodiment of this invention is shown. The disassembled perspective view of the packaging material which concerns on the same embodiment is shown. It is a top view of the packaging material which concerns on the embodiment, Comprising: (a) shows the figure seen from the outer film side, (b) shows the figure seen from the inner film side. The schematic longitudinal cross-sectional view of the packaging material which concerns on the same embodiment is shown. It is explanatory drawing of the original fabric for producing the outer film of the packaging material which concerns on the same embodiment, and an inner film, Comprising: (a) is a partial top view of the original film for outer films (B) shows the partial top view of the original fabric for inner films. The schematic perspective view for demonstrating the manufacturing process of the packaging material which concerns on the embodiment is shown. It is a process figure at the time of packaging cooked rice processed food with the packaging material concerning the embodiment, (a) shows the perspective view of the state where the cooked rice processed food is arranged on the packaging material, (b) The perspective view of the state which folded the packaging material in half is shown, (c) shows the perspective view of the state which folded the both-sides edge part of the packaging material and sealed with the other party which opposes, (d) shows an opening part. The perspective view of the state (state which packaged the cooked rice processed food) which sealed and obstruct | occluded is shown. It is process drawing at the time of opening the packaging material which concerns on the embodiment, Comprising: (a) shows the perspective view of the state which has pulled the holding part and has cut | disconnected the outer film, (b) is an outer film The perspective view of the state which excised a part of length in the length direction and divided | segmented the outer film into the width direction is shown, (c) is a perspective view of an initial state when pulling the both ends of the edge part of a packaging material (D) shows the perspective view of the state (the state which opened the packaging material) which pulled out the inner film from between cooked-rice processed food and sheet-shaped food, and united cooked-rice processed food and sheet-shaped food . It is explanatory drawing for demonstrating the aspect of an inner film when the packaging material which concerns on the embodiment is pulled in the width direction, Comprising: (a) shows an initial state, (b) is an expansion film part. The state in the middle of being stretched is shown, and (c) shows the state in which the inner film is completely stretched. Explanatory drawing for demonstrating the relationship of the force which acts at the time of opening of the packaging material which concerns on the embodiment (when an inner film is fully extended) is shown. Sectional drawing which represented the packaging material which concerns on other embodiment of this invention typically is shown. The perspective view of the state which packaged the cooked rice processed food with the conventional packaging material is shown. The exploded perspective view of the conventional packaging material is shown. Explanatory drawing for demonstrating the relationship of the force which acts at the time of opening the conventional packaging material is shown.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Packaging material, 1 '... Raw material for packaging materials, 10 ... Outer film, 10' ... Raw material for outer film, 20 ... Inner film, 20 '... Original material for inner film, 20a ... Center film part, 20a' ... Center band part, 20b ... Expansion film part, 20b '... Expansion part, 20c ... Side film part, 20c' ... Side band part, 100a, 100b ... Cutting assist means (cut tape), 101 ... Enlargement part, 102 ... Holding part, 103 ... notch part, 104 ... outer notch part, 105 ... outer notch part for folding, 200 ... break assisting means (half cut), 201 ... notch part for breaking, 202 ... inner notch part for folding, 210 ... Folding part 211 ... Inward piece part 212 ... Outward piece part A ... Rice processed food, B ... Sheet food, CL ... Center line, F1, F2 ... Long film, La ... First ridge line, Lb ... No. Second ridge line, Pa ... working point Pb ... contact point, S ... a sheet-like food

Claims (4)

The outer film configured to be splittable in the width direction and the break assisting means are formed to overlap the outer film via the sheet-like food and extend linearly over the entire length in the length direction orthogonal to the width direction. The inner film configured to be separable in the same direction as the outer film by being broken by the break assisting means, and the opposite ends are sealed by folding the whole in half in the length direction. In the packaging material configured to wrap processed food, the inner film is connected to the center film portion on which the break assisting means is formed and to both ends in the width direction of the center film portion, and extends in the width direction. capable comprises a pair of extension film portion configured, a pair of side film portion extending outward in the width direction from the tip of each extension film portion, the extension film portion in the width direction in the sheet type food side At least one folded portion composed of an inwardly extending piece extending from the side toward the inside and an outwardly extending piece extending from the tip of the inwardly extending piece toward the outside in the width direction, the center film portion The packaging material , wherein the extension film portion and the side film portion are integrally formed by bending a single film so as to form a ridge line extending in the same direction as the break assisting means . The packaging material according to claim 1, wherein the break assisting means is configured by a half cut formed in a non-penetrating state. A length that includes an outer film configured to be splittable in the width direction and an inner film that is overlapped with the outer film via a sheet-like food and configured to be separable in the same direction as the outer film, and is orthogonal to the width direction. It is an inner film for a packaging material that is configured to wrap the whole in half in a direction and seal opposite ends to wrap the cooked rice processed food, and is linear over the entire length in the length direction A center film portion formed with breakage assisting means extending in a pair, a pair of expansion film portions that are connected to both side ends in the width direction of the center film portion and configured to be expandable in the width direction, and tips of the respective expansion film portions A pair of side film portions extending outward in the width direction from each other, and each expansion film portion includes an inward piece portion extending inward from the outer side in the width direction and an outer width portion outward from the tip of the inward piece portion. Outside extending towards The center film portion, the extension film portion, and the side film portion bend one film so as to form a ridge line extending in the same direction as the break assisting means. An inner film for a packaging material, which is integrally formed by processing . The inner film for a packaging material according to claim 3, wherein the break assisting means is constituted by a half cut formed in a non-penetrating state.

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