JP2012218764A - Fast food, packaging material for fast food, and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging material for fast food, capable of easily avoiding loss of shape in fast food.SOLUTION: When a hamburger H butts against the deepest portion of a first bag-like space, an operator fully covers the hamburger H with a third sheet piece 29 while pulling up the third sheet piece 29. As a result, the wrapping of the hamburger H can be further reinforced. In this way, only by picking up the second edge 29b of the third sheet piece 29 and sliding the hamburger H on the second surface of a main sheet piece 12 by the operator, the hamburger H can be wrapped with a first sheet piece 23, a second sheet piece 25 and the third sheet piece 29.

Description

  The present invention relates to, for example, a hamburger or other fast food, a packaging material for fast food, and a method for producing the same. Throughout the following specification and claims, the “sheet piece” includes any thin film piece that is flexible enough to wrap up an object regardless of the type of material such as paper or resin. Can be.

  For example, a bag-type packaging material is used for packaging a hamburger containing a large amount of sauce. This packaging material is composed of a pair of rectangular paper pieces. The pieces of paper to be overlapped are stuck together on three sides. According to such a bag-shaped packaging material, it is possible to prevent the source from leaking outside (Patent Documents 1 to 3).

JP 2010-241439 A Japanese Patent Laid-Open No. 10-193518 Japanese Patent No. 3607750

  However, in such a packaging material, the opening is bordered on one side of the paper piece. The depth of the accommodation space is deep. When the hamburger is slid from the opening to the back of the accommodation space, the hamburger buns are easily displaced by friction with the inner surface of the packaging material. The hamburger gets out of shape. Workers take care in avoiding such deformation. As a result, work efficiency is deteriorated.

  In addition, in a certain kind of packaging material, the overlapped paper pieces are bonded together on two adjacent sides. Since the edges of the overlapping paper pieces are fused, the gusset is not attached to the bag. In addition, since the two pieces adjacent to each other across the corner are fused, the bottom of the bag cannot be flattened. Therefore, a space is formed between the side surface of the hamburger and the bottom of the bag. The sauce functions as a lubricant, and every time a food and drinker bites a hamburger, the ingredients slide down from between the buns toward the space.

  According to some aspects of the present invention, it is possible to provide a fast food packaging material capable of easily avoiding the deformation of the fast food food. According to another aspect of the present invention, it is possible to provide a method for producing a fast food and a fast food packaging material that are packaged and provided with such a fast food packaging material.

  According to the first aspect of the present invention, a main body sheet piece that divides a receiving area for receiving a fast food food in part, and a valley fold from an edge of the main body sheet piece, overlaps with a part of the receiving area. A first sheet piece that forms a first bag-shaped space having a first depth, and is folded from the edge of the first sheet piece at the opening of the first bag-shaped space, and overlapped on the outer surface of the first sheet piece. A fast food packaging material comprising: a second sheet piece that forms a second bag-like space having a second depth shallower than the first depth, which is folded at an intermediate position thereof and overlaps the first sheet piece. Is done.

  Such fast food packaging materials (hereinafter referred to as “packaging materials”) are used for packaging fast food products (hereinafter referred to as “food products”). In packaging, the food is placed in the receiving area at a position away from the first sheet piece. When the second sheet piece is pulled up in the direction away from the main sheet piece, the volume of the first bag-like space is expanded to form a food containing space. The operator can slide the food and enter the food storage space by the first bag-shaped space. At this time, if the depth of the first bag-shaped space is set smaller than the size of the food, the food only partially enters the first bag-shaped space. Compared to the case where the food is completely pushed into the bag-like space, the food can be easily prevented from being deformed. Further, when the second sheet piece folded at the intermediate position is pulled up in a direction away from the first sheet piece, the second sheet piece is largely unfolded. As a result, the second sheet piece having a length equal to or greater than the second depth of the second bag-shaped space forms a continuous plane with the first sheet piece having the first depth of the first bag-shaped space. Therefore, the space in which the first and second sheet pieces are formed to face the main sheet piece can be used as a food storage space, which contributes to further increase in the food storage space. Can be wrapped.

  During the eating and drinking of food, the food can be partially exposed while remaining in the first bag-like space. Thus, since the food is held in the first bag-like space, even if the fluid flows out of the food due to the action of gravity, for example, such a fluid can be held in the first bag-like space. The fluid does not leak out. Eating and drinking can eat food without worrying about leakage of fluid.

  The packaging material may further include a third sheet piece that is mountain-folded from an edge of the second sheet piece at the opening of the second bag-like space and is overlapped on the outer surface of the second sheet piece. When the third sheet piece is pulled up in the direction away from the second sheet piece, the space in which the first, second, and third sheet pieces are formed to face the main sheet piece can be used as a food containing space. The food wrapping can be further reinforced because it contributes to a further increase in the storage space.

  The third sheet piece can protrude outside the edge of the main sheet piece. Since the third sheet piece protrudes outside the main sheet piece, the operator can easily grasp the edge of the third sheet piece when packaging fast food. Work efficiency is increased.

  In this packaging material, the first sheet piece and the main sheet piece, which are folded and overlapped from the edge of the main sheet piece in forming the first bag-shaped space having the first depth, are bonded 1 to each other. The pair of adhesive portions are a pair of branch lines that branch from the fold line defined by the edge of the main sheet piece toward the both side edges of the main sheet piece at a predetermined inclination angle with respect to the fold line, respectively. It should just extend along.

  According to such a structure, when the first sheet piece is developed with respect to the main sheet piece, the first bag-like space is formed into a ship bottom shape by the action of the pair of adhesive portions. Thus, the main sheet piece and the first sheet piece form gussets on the side of the food. Accordingly, the packaging material can uniformly contact the side of the food. Formation of a space between the side surface of the food and the packaging material is prevented. Eating and drinking can grab the food in a stable state from the outside of the packaging material. Because there is no space, the food position is stable. At the same time, even if a person who eats and drinks presses the food from the top of the packaging material, the ingredients can be prevented from sliding down from the side of the food.

  In the packaging material, in forming the first bag-like space, the first sheet piece that is valley-folded and overlapped from the edge of the main sheet piece and the main sheet piece are fused to each other; In forming the second bag-shaped space, the second fusion part that fuses the second sheet pieces that are valley-folded and overlapped at the intermediate position to each other includes a main sheet piece, a first sheet piece, and a second sheet piece. When the sheet pieces are sequentially stacked, they may overlap each other.

  According to such a configuration, when the main sheet piece, the first sheet piece, and the second sheet piece are stacked, the first fusion part and the second fusion part are simultaneously heated with one heating jig (for example, hot press). Can be done. Therefore, the manufacturing process of the packaging material can be simplified. The manufacturing cost of the packaging material can be reduced.

  A fast food should just be provided with the above packaging materials and the foodstuffs accepted in the said 1st bag-like space of a packaging material. The food may be wrapped in the main sheet piece, the first sheet piece, and the second sheet piece.

  According to the second aspect of the present invention, the material piece having the first surface that is the non-fused surface and the second surface that is the fused surface on the back side is folded back along the first valley fold line, and the second surfaces are overlapped. A step of aligning, a step of folding a folded piece formed by folding back at the first valley fold line at a first mountain fold line parallel to the first valley fold line, and overlapping the first surfaces; A folded piece formed by folding at a fold line is folded at a second valley fold line parallel to the first mountain fold line and closer to the first mountain fold line than the first valley fold line, and the second surfaces are joined together. And a second mountain fold parallel to the second valley fold line and closer to the second valley fold line than the first mountain fold line. Folding with a line and overlapping the first surfaces, the first valley fold line, the first mountain fold line, The material pieces folded and overlapped at the second valley fold line and the second mountain fold line are respectively inclined at a predetermined inclination angle with respect to the first valley fold line toward both side edges of the material piece. There is provided a method for manufacturing a packaging material, which includes a step of applying a heating jig along a pair of branch lines branched from a one-fold fold line and establishing fusion between the second surfaces overlapped. According to such a method for manufacturing a packaging material, the packaging material as described above can be manufactured.

  As described above, according to the present invention, the deformation of the fast food food can be easily avoided.

A front view, a top view, a left side view, a right side view, and a bottom view of a packaging material for fast food (hereinafter referred to as “packaging material”) are shown. The rear view of a packaging material is shown. It is an expansion partial perspective view of a packaging material. It is a perspective view which shows a 1st bag-shaped space schematically. It is a rear view which shows a main body sheet piece and the 1st sheet piece piled up on it. It is a perspective view which shows a 2nd bag-shaped space schematically. It is a rear view which shows a main sheet piece and the 1st sheet piece and 2nd sheet piece which are piled on it. It is an expanded sectional view of the raw material of a main sheet piece, a 1st sheet piece, a 2nd sheet piece, and a 3rd sheet piece. It is a perspective view which shows the packaging material which receives a hamburger. It is a perspective view which shows roughly the packaging material which received the hamburger partially in the 1st bag-shaped space. It is a perspective view which shows roughly the packaging material which covered the hamburger with the 1st sheet piece, the 2nd sheet piece, and the 3rd sheet piece. It is a perspective view which shows roughly the packaging material folded in half in the packaging of a hamburger. It is a perspective view which shows roughly the packaging material folded in three in packaging of a hamburger. It is a perspective view which shows roughly the packaging material which opened the package in ingesting a hamburger. It is a perspective view which shows a raw material sheet piece roughly. It is a perspective view which shows roughly the raw material sheet piece return | folded by the 1st valley fold line. It is a perspective view which shows roughly the raw material sheet piece returned by the 1st mountain fold line. It is a perspective view which shows roughly the raw material sheet piece folded in by the 2nd valley fold line. It is a perspective view which shows roughly the raw material sheet piece return | folded by the 2nd mountain fold line. It is a rear view of the raw material sheet piece which shows a heating position.

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

  FIG. 1 schematically shows a fast food packaging material (hereinafter referred to as “packaging material”). The packaging material 11 includes one main sheet piece 12. The main sheet piece 12 is made of, for example, a thin flexible material piece. Details of the material piece will be described later. FIG. 1 shows a first surface of the main sheet piece 12. For example, a pattern or a character may be printed on the first surface of the main sheet piece 12.

  The main sheet piece 12 is formed in a rectangular shape. The rectangular first side 13 a is partitioned by a first straight line 14. The second side 13b and the third side 13c orthogonal to the first side 13a, that is, both side edges are partitioned by the second straight line 15 and the third straight line 16 orthogonal to the first straight line 14, respectively. The fourth side 13 d facing the first side 13 a is partitioned by a fourth straight line 17 extending in parallel with the first straight line 14.

  FIG. 2 shows a second surface of the main sheet piece 12. The second surface corresponds to the back surface of the first surface. The main sheet piece 12 divides the receiving area 18 into a part. The receiving area 18 receives fast food food as will be described later. For example, the main sheet piece 12 is divided into six equal parts when the receiving area 18 is partitioned. The fifth straight line 19 may be drawn in parallel with the first straight line 14 and the fourth straight line 17 in six equal parts. The fifth straight line 19 bisects the second side 13b and the third side 13c. Similarly, the sixth straight line 21 and the seventh straight line 22 may be drawn parallel to the second straight line 15 and the third straight line 16. The sixth straight line 21 and the seventh straight line 22 divide the first side 13a and the fourth side 13d into three equal parts. The receiving area 18 is partitioned by a fourth straight line 17, a fifth straight line 19, a sixth straight line 21, and a seventh straight line 22. However, the catching area 18 may be adjusted as appropriate according to the size and shape of the fast food. In the drawing, the receiving area 18 is hatched when the receiving area 18 is illustrated. This hatching is used for drawing drawing and is not drawn on the main sheet 12 itself.

  Referring also to FIG. 3, the first sheet piece 23 is folded back from the edge of the main sheet piece 12, that is, the fourth side 13d. For example, the first sheet piece 23 may be continuous with the main sheet piece 12. The first sheet piece 23 is overlaid on the second surface of the main sheet piece 12. The first sheet piece 23 is partitioned by a fourth straight line 17 and an eighth straight line 24. The first edge 23 a of the first sheet piece 23 is defined by the fourth straight line 17. The second edge 23 b of the first sheet piece 23 is defined by an eighth straight line 24. The fourth straight line 17 corresponds to a fold line defined by the edge of the main sheet piece 12. The eighth straight line 24 is set parallel to the fourth straight line 17 between the fourth straight line 17 and the fifth straight line 19. The position of the eighth straight line 24 may be appropriately adjusted according to, for example, the outline and thickness of the fast food product. In addition, instead of such folding, the first edge 23a of the first sheet piece 23 and the fourth side 13d of the main sheet piece 12 may be fused without interruption in their linear directions.

  The second sheet piece 25 is folded back from the second edge 23 b of the first sheet piece 23. For example, the second sheet piece 25 may be continuous with the first sheet piece 23. The second sheet piece 25 is overlaid on the outer surface of the first sheet piece 23. The second sheet piece 25 is folded back at the intermediate position. In this way, the second sheet pieces 25 are overlapped. The second sheet piece 25 is partitioned by an eighth straight line 24 and a ninth straight line 26. The first edge 25 a of the second sheet piece 25 is defined by the eighth straight line 24. The second edge 25 b of the second sheet piece 25 is defined by a ninth straight line 26. The folding line 27 at the intermediate position is defined by the tenth straight line 28. The tenth straight line 28 is set parallel to the eighth straight line 24 between the eighth straight line 24 and the fourth straight line 17. The ninth straight line 26 is set parallel to the eighth straight line 24 between the eighth straight line 24 and the tenth straight line 28. In addition, instead of folding, the first edge 25a of the second sheet piece 25 and the second edge 23b of the first sheet piece 23 may be fused in the line direction without interruption, and instead of folding at the intermediate position. Then, the second sheet pieces 25 divided at the folding position may be fused to each other at the intermediate position.

  The third sheet piece 29 is folded back from the second edge 25 b of the second sheet piece 25. For example, the third sheet piece 29 may be continuous with the second sheet piece 25. The third sheet piece 29 is overlaid on the outer surface of the second sheet piece 25. The third sheet piece 29 is partitioned by a ninth straight line 26 and an eleventh straight line 31. The first edge 29 a of the third sheet piece 29 is defined by the ninth straight line 26. The second edge 29 b of the third sheet piece 29 is defined by the eleventh straight line 31. The second edge 29 b of the third sheet piece 29 extends outward from the edge of the main sheet piece 12. That is, the eleventh straight line 31 is set outside the main sheet piece 12.

  As shown in FIG. 4, the main sheet piece 12 and the first sheet piece 23 are bonded to each other by two first bonding areas 32. Fusion is used for bonding. The individual first adhesive regions 32 branch from the edge (fourth side 14 d) of the main sheet piece 12 and reach the second edge 23 b of the first sheet piece 23. Thus, since the two first adhesive regions 32 are continuous from the edge of the main sheet piece 12, the first sheet having the first depth is formed between the main sheet piece 12 and the first sheet piece 23 folded back from the edge of the main sheet piece 12. A bag-like space 33 is formed. The opening of the first bag-shaped space 33 is trimmed by the second edge 23 b of the first sheet piece 23. As shown in FIG. 5, the first depth D <b> 1 corresponds to the distance between the fourth straight line 17 and the eighth straight line 24. The first bag-shaped space 33 overlaps only a part of the receiving area 18.

  The individual first bonding regions 32 are formed without a break along a pair of twelfth straight lines 34 that intersect the fourth straight line 17 and the eighth straight line 24. The twelfth straight line 34 branches off from the fourth straight line 17 at a predetermined inclination angle α so that the distance between the twelfth straight lines 34 increases as the distance from the fourth straight line 17 increases. And toward the third straight line 16. The inclination angle α is preferably set to 60 degrees, for example.

  As shown in FIG. 6, the second sheet pieces 25 that are folded and overlapped at an intermediate position are bonded to each other at two second bonding areas 35. Fusion is used for bonding. Each of the second bonding areas 35 branches off from the folding line at the intermediate position and reaches the second edge 25 b of the second sheet piece 25. In this way, since the two second adhesive regions 35 are continuous from the folding line 27, a second bag-like space 36 having a second depth is formed between the second sheet pieces 25 folded at the intermediate position. The opening of the second bag-shaped space 36 is bordered by the second edge 25 b of the second sheet piece 25. As shown in FIG. 7, the second depth D <b> 2 corresponds to the distance between the ninth straight line 26 and the tenth straight line 28. The second depth D2 is set shallower than the first depth D1.

  The individual second bonding areas 35 are formed between the tenth straight line 28 and the ninth straight line 26 along the twelfth straight line 34 without interruption. Accordingly, as the distance from the tenth straight line 28 increases, the distance between the second bonding areas 35 increases. In addition, the individual second bonding areas 35 overlap the corresponding first bonding areas 32.

  For example, as shown in FIG. 8, the main sheet piece 12, the first sheet piece 23, the second sheet piece 25, and the third sheet piece 29 are formed from, for example, processed paper 37. The processed paper 37 is formed from a laminate of paper and a thermoplastic resin film. Here, absorbent paper 39 is sandwiched between a pair of flexible low-density polyethylene thin films 38a and 38b. The film thickness of the low density polyethylene thin films 38a and 38b may be set to about 10 μm, for example. The thickness of the absorbent paper 39 may be set to about 15 gsm, for example. Then, thin paper 41 is laminated on the outer surface of the low density polyethylene thin film 38b. The thickness of the thin paper 41 may be set to about 21 gsm, for example. The outer surface of the thin paper 41 serves as the first surface of the main sheet piece 12. The outer surface of the low-density polyethylene thin film 38a serves as the second surface of the main sheet piece 12. Such processed paper 37 can prevent permeation of liquids such as moisture and oil. The low density polyethylene thin film 38a serving as the second surface may be replaced with a heat-sealable material such as a polypropylene (PP) spunbond nonwoven fabric. In addition, other materials may be used instead of the low density polyethylene thin film 38b. In addition, in place of the processed paper 37, an oil resistant paper laminated with a polypropylene spunbond nonwoven fabric may be used. The thickness of the oil resistant paper may be set to about 20 to 80 gsm, for example. The film thickness of a nonwoven fabric should just be set to about 10-100 gsm, for example. According to such a material, bleeding of oil can be prevented and, at the same time, permeation of water vapor can be ensured.

  Next, the usage method of the packaging material 11 is demonstrated easily. The packaging material 11 is used for packaging a hamburger, for example. First, as shown in FIG. 9, the packaging material 11 is spread on a cooking table or work table. The packaging material 11 is placed so that the second surface of the main sheet piece 12 faces upward. The operator places the hamburger H in the receiving area 18. Here, the hamburger H may be disposed in the receiving area 18 at a position adjacent to the first sheet piece 23.

  Subsequently, the operator pulls up the second edge 29 b of the third sheet piece 29. Since the third sheet piece 29 protrudes outside the main sheet piece 12, the operator can easily grasp the second edge 29 b of the third sheet piece 29. As a result, work efficiency is increased. When the second edge 29b is pulled up in this way, as shown in FIG. 10, the second sheet piece 25 is not fused to the first sheet piece 23 and continues at the first edge 25a. The piece 25 and the third sheet piece 29 rise up.

  When the third sheet piece 29 is further pulled up, the opening of the first bag-shaped space 33 is opened. The operator slides the hamburger H and enters the hamburger H into the first bag-shaped space 33. The worker keeps the hamburger H entering until the hamburger H hits the deepest portion of the first bag-shaped space 33. Here, as shown in FIG. 10, since the first depth D1 of the first bag-shaped space 33 is set smaller than the size of the hamburger H, the hamburger H is only partially in the first bag shape. It does not enter the space 33. Compared with the case where the hamburger H is completely pushed into the bag-like space from the opening, the hamburger H can be easily prevented from being deformed.

  When the hamburger H hits the deepest part of the first bag-shaped space 33, the folded first sheet piece 23 and main sheet piece 12 are largely unfolded on both sides of the first edge 23a and the fourth side 13d. At the same time, the folded second sheet piece 25 is largely unfolded on both sides of the folding line 27. On the other hand, the first adhesive region 32 and the second adhesive region 35 continue to restrain the overlap of the main sheet piece 12 and the first sheet piece 23 and the overlap of the second sheet pieces 25 that are folded back. As a result, the first bag-like space 33 and the second bag-like space 36 are continuous with one space, and the depth of the space increases. The accommodation space is increased. The hamburger H can be sufficiently wrapped with the first sheet piece 23 and the second sheet piece 25.

  As shown in FIG. 11, when the hamburger H hits the deepest portion of the first bag-shaped space 33, the operator covers the third sheet piece 29 fully over the hamburger H while pulling up the third sheet piece 29. As a result, the wrapping of the hamburger H can be further reinforced. Thus, the operator simply picks up the second edge 29b of the third sheet piece 29 and slides the hamburger H on the second surface of the main sheet piece 12, and the hamburger H has the first sheet piece 23, the second sheet piece 25, and the second sheet piece. It can be wrapped in three sheet pieces 29.

  Thereafter, as shown in FIG. 12, the main sheet piece 12 is folded along the fifth straight line 19. Subsequently, as shown in FIG. 13, the main sheet piece 12 is folded along a sixth straight line 21 and a seventh straight line 22. In this way, the hamburger H is completely wrapped in the packaging material 11. Product as fast food F is completed.

  For example, as shown in FIG. 14, the eating and drinking person can unwrap the packaging material 11 and bite it into the hamburger H. At this time, the third sheet piece 29 may be folded back at the first edge 29 a (corresponding to the second edge 25 b of the second sheet piece 25), and the main sheet piece 12 is also exposed to the outside near the opening of the first bag-shaped space 33. It only has to be folded. The hamburger H is exposed while being partially accommodated in the first bag-like space 33. Since the hamburger H is held in the first bag-like space 33 in this way, even if a source or other fluid flows out of the hamburger H by the action of gravity, for example, such fluid is held in the first bag-like space 33. be able to. The fluid does not leak out. Eating and drinking can eat the hamburger H without worrying about leakage of the fluid.

  When the first sheet piece 23 is unfolded with respect to the main sheet piece 12, the first bag-like space 33 is formed into a ship bottom shape by the action of the first adhesive region 32. Thus, the main sheet piece 12 and the first sheet piece 23 form a gusset on the side surface of the hamburger H. Therefore, the packaging material 11 can uniformly contact the side surface of the hamburger. Formation of a space between the side surface of the hamburger H and the packaging material 11 is prevented. The eating and drinking person can grip the hamburger H in a stable state from the outside of the packaging material 11. Since there is no space, the position of the hamburger H is stable. At the same time, even if a person who eats and drinks presses the hamburger H from above the packaging material 11, it is possible to prevent ingredients such as meat from sliding down from the side of the hamburger H.

  In the case where the main sheet piece 12, the first sheet piece 23, the second sheet piece 25, and the third sheet piece 29 are replaced with oil-resistant paper and a polypropylene spunbond nonwoven fabric instead of the processed paper 37 is used. The water can evaporate without oozing the oil. As a result, even if the hamburger H is reheated in a microwave oven, for example, the hamburger H is not sticky, and the eater can enjoy the fresh taste.

  Next, the manufacturing method of the packaging material 11 is demonstrated easily. First, as shown in FIG. 15, one material sheet piece 43 is prepared. The material sheet piece 43 is formed of a sheet of the processed paper 37 described above. The size of the material sheet piece 43 is set according to the size of the fast food food wrapped in the packaging material 11. The thin paper 41 of the processed paper 37 becomes the first surface of the material sheet piece. The low density polyethylene thin film 38a of the processed paper 37 becomes the back surface of the first surface, that is, the second surface. The second surfaces can be fused together. The first surfaces are not fused together. Characters and patterns are printed in advance on the first surface.

  The material sheet piece 43 is placed on a work table or other flat surface so that the second surface, that is, the surface on the thin paper 41 side faces upward. The first edge 44 a of the material sheet piece 43 corresponds to the first side 13 a of the main sheet piece 12. The first edge 44 a is partitioned by the first straight line 14. The second edge 44 b and the third edge 44 c of the material sheet piece 43 are partitioned by the second straight line 15 and the third straight line 16. The fourth edge 44 d facing the first edge 44 a corresponds to the second edge 29 b of the third sheet piece 29.

  The material sheet piece 43 is folded. First, as shown in FIG. 16, the material sheet piece 43 is folded at a first valley fold line 45. The first valley fold line 45 corresponds to the fourth straight line 17. The second surfaces are overlapped. Thus, the edge of the main sheet piece 12, that is, the fourth side 13d is formed. A part of the material sheet piece 43 is folded at a first valley fold line 45 to form a folded piece 46.

  Next, as shown in FIG. 17, the folded piece 46 is folded at a first mountain fold line 47. The first mountain fold line 47 is set parallel to the first valley fold line 45. The first mountain fold line 47 corresponds to the eighth straight line 24. The first surfaces are overlapped. Thus, the second edge 23b of the first sheet piece 23 is formed. A part of the folded piece 46 is folded at a first mountain fold line 47 to form a folded piece 48.

  Subsequently, as shown in FIG. 18, the folded piece 48 is folded at a second valley fold line 49. The second valley fold line 49 is set parallel to the first mountain fold line 47. The second valley fold line 49 is disposed at a position closer to the first mountain fold line 47 than the first valley fold line 45. The second valley fold line 49 corresponds to the tenth straight line 28. The second surfaces are overlapped. Thus, the folding line 27 of the second sheet piece 23 is formed. A part of the folded piece 48 is folded at a second valley fold line 49 to form a folded piece 51.

  Subsequently, as shown in FIG. 19, the folded piece 51 is folded at the second mountain fold line 52. The second mountain fold line 52 is set in parallel to the second valley fold line 49. The second mountain fold line 52 is disposed at a position closer to the second valley fold line 51 than the first mountain fold line 47. The second mountain fold line 52 corresponds to the ninth straight line 26. The first surfaces are overlapped. Thus, the second edge 25b of the second sheet piece 25 is formed. A part of the folded piece 51 is folded at the second mountain fold line 52 to form the folded piece, that is, the third sheet piece 29. The fourth edge 44d of the material sheet piece 43 protrudes outside the edge of the main sheet piece 12 (the first edge 23a of the first sheet piece 23).

  A heating jig (for example, a hot press) is pressed against the material sheet piece 43 thus folded. As shown in FIG. 20, the heating jig has a long flat surface 54. Prior to application of the heating jig, the material sheet piece 43 is turned over. The folded material sheet piece 43 is sandwiched between the flat surface 54 of the heating jig and the flat surface of the work table. The flat surface 54 of the heating jig is positioned along a pair of branch lines 55 that branch from the first valley fold line 45. The branch line 55 corresponds to the twelfth straight line 34. The branch line 55 branches from the first valley fold line 45 at a predetermined inclination angle α so that the distance between the branch lines 55 increases as the distance from the first valley fold line 45 increases. It goes to the straight line 15 and the third straight line 16. The inclination angle α is preferably set to 60 degrees, for example. Thermal energy is applied to the material sheet piece 43 from the flat surface 54 of the heating jig. Fusion is established between the second surfaces according to the application of thermal energy. Thus, the first adhesive region 32 and the second adhesive region 35 are formed. The production of the packaging material 11 ends.

  In the above description, the first to twelfth straight lines 14 to 17, 19, 21, 22, 24, 26, 28, 31, and 34 are only virtual lines used for defining the shape. The packaging material 11 can be used for packaging fast food products such as sandwiches and rice balls in addition to the burgers described above. In addition, in forming the first adhesive region 32 and the second adhesive region 35, heat welding of the thermoplastic resin film of the processed paper 37 may be used as described above, or adhesion using an adhesive may be used. .

  11 Fast Food Packaging Material, 12 Main Sheet Piece, 13d Main Sheet Piece Edge (Fourth Side), 18 Receiving Area, 23 First Sheet Piece, 23b First Sheet Piece Edge (Second Edge), 25 Second Sheet piece, 25b Edge of second sheet piece (second edge), 29 Third sheet piece, 32 Adhesive part (first fused part), 33 First bag-like space, 34 Branch line (12th straight line), 35 2nd fusion part, 36 2nd bag-like space, 43 material piece (material sheet piece), 45 1st valley fold line, 46 fold piece, 47 1st mountain fold line, 48 fold piece, 49 2nd valley fold line , 51 folded piece, 52 second mountain fold line, 55 branch line, 54 heating jig (flat surface thereof), D1 first depth, D2 second depth, F fast food, H hamburger as fast food food, α Tilt angle.

Claims (7)

A main body sheet piece that divides a receiving area for receiving fast food food in part,
A first sheet piece which is valley-folded from an edge of the main sheet piece and overlaps a part of the receiving area to form a first bag-shaped space having a first depth;
The first sheet is folded from the edge of the first sheet piece at the opening of the first bag-like space and overlapped with the outer surface of the first sheet piece, and is folded at the middle position and overlaps the first sheet piece. A fast food packaging material, comprising: a second sheet piece that forms a second bag-shaped space having a second depth shallower than the depth. In the fast food packaging material according to claim 1,
A fast food packaging material, further comprising a third sheet piece that is mountain-folded from an edge of the second sheet piece at the opening of the second bag-like space and overlapped with an outer surface of the second sheet piece. The fast food packaging material according to claim 2,
The packaging material for fast food, wherein the third sheet piece protrudes outward from the edge of the main sheet piece. In the fast food packaging material according to any one of claims 1 to 3,
In forming the first bag-shaped space, the first sheet piece that is valley-folded and overlapped from the edge of the main sheet piece and the pair of bonding portions that bond the main sheet piece to each other are formed of the main sheet piece. A fast food that extends from a fold line defined by the edge toward a side edge of each of the main sheet pieces along a pair of branch lines that branch at a predetermined inclination angle with respect to the fold line. Packaging materials. In the fast food packaging material according to any one of claims 1 to 3,
A first fusing part that fuses the first sheet piece and the main sheet piece, which are valley-folded and overlapped from the edge of the main sheet piece in forming the first bag-like space;
In the formation of the second bag-like space, a second fusion part that mutually fuses the second sheet pieces that are folded back and stacked at the intermediate position,
A packaging material for fast food, wherein the main sheet piece, the first sheet piece, and the second sheet piece are overlapped with each other in order. The fast food is received in the first bag-shaped space of the fast food packaging material according to any one of claims 1 to 5, and the fast food is formed by the main sheet piece, the first sheet piece, and the second sheet piece. Fast food characterized by wrapping food. Folding back a piece of material having a first surface that is a non-fused surface and a second surface that is a fused surface on the back side at a first valley fold line, and overlapping the second surfaces;
Folding back a folded piece formed by folding at the first valley fold line at a first mountain fold line parallel to the first valley fold line, and overlapping the first surfaces;
The folded piece formed by folding at the first mountain fold line is folded at a second valley fold line parallel to the first mountain fold line and closer to the first mountain fold line than the first valley fold line; A process of superimposing two surfaces;
The folded piece formed by folding at the second valley fold line is folded at a second mountain fold line parallel to the second valley fold line and closer to the second valley fold line than the first mountain fold line, A process of superimposing one surface;
The first piece fold line, the first mountain fold line, the second valley fold line, and the material pieces that are folded and overlapped with the second mountain fold line, respectively, toward the both side edges of the material pieces, respectively. A heating jig is applied along a pair of branch lines branching from the first valley fold line at a predetermined inclination angle with respect to the one valley fold line, and fusion is established between the second surfaces overlapped with each other. And a process for producing a fast food packaging material.

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