JP5062409B2 - Boxed packaging bag for microwave oven - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a microwaveable boxed packaging bag having a structure in which a packaging bag such as a pouch capable of being heated in a microwave oven with a steam vent is formed.

  2. Description of the Related Art Conventionally, there has been proposed a microwave oven boxed pouch having a structure in which a food pouch (packaging bag) that can be heated in a microwave oven is housed in a decorative box (box) (see Patent Document 1). This microwave oven pouch is made by peeling off the peeling piece on the upper surface of the cosmetic box containing the microwave heating pouch, opening the cosmetic box, and using the lower surface portion of the upper surface facing the peeled portion as a fulcrum. By rotating the tip, the end of the pouch stored in the decorative box is exposed. And the pouch stored in the state where the end portion is exposed to the inclined decorative box with the rotated tip portion like a support base is heated in the microwave oven.

According to such a microwave oven pouch, the pouch can be heated in the microwave oven simply by opening the cosmetic box and rotating its tip without having to take out the pouch from the cosmetic box. become.
JP 2003-170930 A

  However, the above-described microwave-packed pouch (packaging bag) must be opened before the microwave oven is heated, and the opening operation of the opened cosmetic box must be performed. In fact, it takes time to set it in the microwave.

This invention is made | formed in view of such a situation, and provides the boxed packaging bag for microwave ovens which can be heated with a microwave oven without spending as much effort as possible.

A packaging box for a microwave oven according to the present invention is a packaging bag for a microwave oven in which a steam vent is formed in a box having a front surface and a back surface facing each other, and a side surface connected to an edge of the front surface and the back surface. Is a packaging bag for a microwave oven having a structure in which the opening is opened by expansion due to an increase in internal pressure of the packaging bag when heated by a microwave oven, on the front surface of the box, The packaging bag is configured to be stored in the box so that the vapor venting portion faces the opening portion.

With such a configuration, an opening portion is provided on the front surface of the box body so as to be opened by expansion associated with an increase in the internal pressure of the packaging bag when heated by a microwave oven. When the microwave oven is heated and the heating operation is performed, the opening portion on the front surface of the box body is naturally opened by the expansion of the heated packaging bag. Thereby, the packaging bag which expand | swells is partially exposed from the open part of the front surface of a box, and a vapor | steam will come out from the vapor vent part formed in the exposed part.

  Also, in the packaging bag for a microwave oven according to the present invention, the packaging bag is in a state of being housed in the box, and a portion corresponding to the opening portion is projected to the back side due to an increase in internal pressure. It can be configured.

  With such a configuration, when the internal pressure of the packaging bag rises due to heating of the microwave oven, the packaging bag expands and a portion corresponding to the opening portion of the box body protrudes to the back side, and the packaging bag opens the opening portion on the front surface of the box body. Since it comes to push more strongly, this opening part becomes easier to open | release.

  Also, in the packaging bag for a microwave oven according to the present invention, the packaging bag is placed in the box so that the portion where the steam vent is formed protrudes toward the opening portion due to an increase in internal pressure. It can be set as the structure which becomes.

  With such a configuration, when the internal pressure of the packaging bag rises due to heating of the microwave oven, the packaging bag expands and the portion where the vapor vent is formed protrudes toward the opening of the box, and the portion of the packaging bag is Since the opening portion on the front surface of the box is pressed more strongly, the opening portion is more easily opened.

  Moreover, the boxed packaging bag for microwave ovens which concerns on this invention WHEREIN: The said opening part can be set as the structure formed of the slit induction | guidance | derivation part which leads a slit by connecting a cutting line.

  With such a configuration, when two-dimensional tension acts on the front surface of the box due to the expansion of the packaging bag during heating by the microwave oven, the front surface is torn so that the cut lines are sequentially connected and each cut line is It is also torn in the direction of crossing. As a result, the front surface of the box is torn along the tear guiding portion, and the opening portion is naturally opened.

  Further, in the microwaveable boxed packaging bag according to the present invention, the tear guide part is configured by a first cut line array configured by connecting a predetermined length of cut line and a predetermined length of cut line. And the first cut line row and the second cut line row are arranged at a predetermined interval.

  With such a configuration, when two-dimensional tension acts on the front surface of the box due to the expansion of the packaging bag during heating by the microwave oven, each of the cut lines in the first cut line array arranged at a predetermined interval It can be cut in a direction crossing the first cut line row and the second cut line row so that the respective cut lines of the second cut line row are connected. As a result, the front surface of the box is consequently cut along the tear guide portion, and the opening portion can be naturally opened.

  Furthermore, in the boxed packaging bag for a microwave oven according to the present invention, a gap between two adjacent cut lines in the first cut line row is opposed to any one of the second cut line rows, A gap between two adjacent cut lines in the second cut line row may be configured to face any one of the first cut lines.

  With such a configuration, a gap between adjacent cut lines in the first cut line row is opposed to any one of the second cut lines, and a gap between adjacent cut lines in the second cut line row is provided. Since it comes to oppose one of the cut lines of the first cut line row, when two-dimensional tension acts on the front surface of the box due to the expansion of the packaging bag, one cut line row (the first cut line row (the first cut line row) It becomes easy to tear from the end of each cut line of the cut line row and the second cut line row) toward the cut line of the other cut line row.

  Further, in the packaging bag for a microwave oven according to the present invention, at least one of the first cut line row and the second cut line row has at least one end cut line of the other cut line row. It can be set as the structure formed so that it may face.

  With such a configuration, at least one end of each cut line of at least one cut line row is formed so as to face the cut line of the other cut line row. When a specific tension is applied, it is easy to be cut from one end of each cut line of one cut line row toward the cut line of the other cut line row.

  Further, in the microwaveable boxed packaging bag according to the present invention, the unsealing portion may be cut open leaving a hinge portion serving as a boundary with the side surface of the front surface.

  With such a configuration, when the opening part on the front side of the box body is opened due to the expansion of the packaging bag, the opening part is not separated from the box body because the boundary between the front surface and the side surface is a hinge part. Can be prevented.

  Further, in the microwaveable boxed packaging bag according to the present invention, the unsealed portion may be configured such that a lid is adhered to the front surface so as to cover an opening formed on the front surface.

  With such a configuration, the bonded lid is peeled off from the front surface due to the expansion of the packaging bag accompanying an increase in the internal pressure of the packaging bag during heating of the microwave oven, and the opening of the front surface covered by the lid is removed. The inner packaging bag is exposed.

  Moreover, the boxed packaging bag for microwave ovens which concerns on this invention WHEREIN: The said cover body can be made into the structure extended from the edge part of the said front side of the said side surface.

  With such a configuration, when the lid bonded to the front surface of the box body is peeled off due to the expansion of the packaging bag, the lid body is connected to the side surface and is not separated from the box body, thereby preventing the generation of extra garbage. be able to.

  According to the packaging bag for a microwave oven according to the present invention, the front surface of the packaging body is expanded by the expansion of the heated packaging bag simply by performing the heating operation by setting the packaging body containing the packaging bag in the microwave oven as it is. Since the unsealed portion is naturally opened, it can be heated in a microwave oven with little effort.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The box body of the microwaveable boxed packaging bag according to the first embodiment of the present invention is configured as shown in FIGS. 1 is a perspective view of the box, and FIG. 2 is a development view of the box.

  In FIG. 1, a box 10 (decoration box) used for a microwave packaging bag (pouch) is made of paper and has a front surface 11 and a back surface 12 facing each other, and edges of the front surface 11 and the back surface 12. It has a flat rectangular parallelepiped shape having side surfaces (upper side surface 13a, lateral side surface 13b, lower side surface 13c, and lateral side surface 13d). Although not shown in FIG. 1, a so-called flat bag type microwave pouch 20 (packaging bag) containing the contents such as food is sealed in the box 10 by heat-sealing the peripheral portion of the plastic sheet. (See FIGS. 5 and 6 to be described later).

  This box 10 is assembled from a spread paper as shown in FIG. Specifically, a rectangular front surface 11, a back surface 12, a strip-shaped upper side surface 13a, one lateral side surface 13b, a lower side surface 13c, the other lateral side surface 13d, and pasting margins 14aa, 14ab, 14ac, 14b, 14ca, A box 10 as shown in FIG. 1 is formed by folding and adhering the spread paper consisting of 14 cb and 14 cc.

  Referring to FIG. 2 together with FIG. 1, the front surface 11 of the box 10 extends obliquely from one end portion on the boundary line 15a to the upper side surface 13a toward the lower side surface 13c, and subsequently to the boundary line 15a. A tearing guide portion 16 extending in parallel and then extending in a substantially trapezoidal shape is formed so as to extend obliquely to the other end portion on the boundary line 15a. The opening part 15 which can open | release the part surrounded by the boundary line 15a with the upper side surface 13a between the both ends of the tear guide part 16 and the tear guide part 16 formed in this substantially trapezoid shape.

The tearing guide 16 guides the tearing of the front surface 11 of the paper box 10, and the front surface 11 can be easily torn along it. For example, as shown in FIG. 3 (a), the tear guide 16 has predetermined lengths of cut lines Scut1 (i), Scut1 (i + 1), Scut1 (i + 2),. A first cut line row 161a that is continuous in a straight line with a gap and a second cut in which cut lines Scut2 (i), Scut2 (i + 1),... Having a predetermined length are connected in a straight line with a predetermined gap It consists of a line train 162a. The first cut line row 161a and the second cut line row 162a are arranged in parallel with a predetermined interval (for example, about 0.5 mm to 5 mm is preferable, and preferably about 1 mm to 1.5 mm). Further, the gap between two adjacent cut lines Scut1 (i) and Scut1 (i + 1) in the first cut line row 161a is opposite to the cut line Scut2 (i) in the second cut line row 162a. The gap between two adjacent cut lines Scut2 (i) and Scut2 (i + 1) of the second cut line row 162a is the cut line Scut1 (i + 1) of any of the first cut line rows 161a. ).
The configuration of the tear guide 16 is not limited to that shown in FIG. 3A, and FIGS. 3B and 4C and FIGS. 4A, 4B, and 4C. Any configuration shown in FIG. Other configuration examples (FIGS. 3B and 3C, FIGS. 4A, 4B, and 4C) of the tear guide 16 will be described later.

  As shown in FIGS. 5 (a), 5 (b) and 6, the flat bag type pouch 20 accommodated in the box 10 has steam vents 21a, 21b and 21c formed at the edges. For example, as disclosed in JP-A-2002-249176, each of the steam vents 21a, 21b, and 21c has a structure in which the periphery of the hole (weakening part) is sealed, and the internal pressure of the pouch 20 is limited. If it exceeds, steam will be ejected from the steam vents 21a, 21b, 21c (holes). Note that the configuration of the vapor venting portion is not limited to that described above, and a predetermined portion of the edge seal portion is narrowed, protruded inward, sealed with an easily peelable film, and the like. When the internal pressure of the film rises, the seal at the predetermined part is peeled off preferentially, a heating element that generates heat by microwave irradiation is attached to the film material (sheet), and the film material melts or seal strength Well-known things, such as what made it fall so that vapor | steam escapes, can be applied. The pouch 20 is housed in the box 10 so that the steam vents 21 a, 21 b, and 21 c are opposed to the opening portion 15 formed on the front surface 11. Further, the pouch 20 is formed with a folded portion 22 that protrudes toward the back surface 12 due to an increase in internal pressure at a portion corresponding to the opening portion 15. The folded portion 22 protrudes when the pouch 20 is inflated, and its detailed structure is disclosed in Japanese Patent Application Laid-Open No. 2006-62672.

  When heating the pouch 20 housed in such a box 10, the box 10 housed in the pouch 20 is set in a microwave oven with the front surface 11 facing upward, and the microwave oven is activated. When the microwave oven performs the heating operation, the internal pressure of the pouch 20 increases due to the generation of water vapor from the contents of the heated pouch 20, and the pouch 20 expands accordingly (see FIGS. 5A and 5B). ). Due to the expansion of the pouch 20, the front surface 11 on which the unsealing portion 15 of the box 10 is formed is pushed outward, and in particular, a portion (folded portion 22) corresponding to the unsealing portion 15 of the expanding pouch 20 protrudes to the back surface 12 side. Thus, the opening 15 is pushed more strongly outward by the pouch 20.

  Thus, when the front surface 11 of the box 10 is pushed outward by the expansion of the pouch 20, the front surface 11 is torn along the tearing guide portion 16, and the further expansion (pushing up) of the pouch 20 causes the As shown in FIG. 6, the unsealing portion 15 is cut open, leaving a boundary line 15a between the front surface 11 and the upper side surface 13a as a hinge portion. Then, the portions where the steam vents 21a, 21b, 21c of the pouch 20 are formed are exposed from the opening 18 formed by opening the opening 15 of the box 10, and when the internal pressure of the pouch 20 exceeds the limit, Steam is ejected from the extraction portions 21a, 21b, and 21c. Thereby, heating by the microwave oven is made while preventing the internal pressure of the pouch 20 from rising excessively.

  The above-described tearing along the tear guiding portion 16 due to the expansion of the pouch 20 will be described in more detail.

  When the front surface 11 of the box 10 is pushed up by the expansion of the pouch 20, a two-dimensional tension is generated on the front surface 11. Since the interval (for example, about 1 mm to 1.5 mm) between the first cut line row 161a and the second cut line row 162a constituting the tear guiding portion 16 is narrow, the first two-dimensional tension causes the first cut The cut line row 161a is cut from the end of each cut line Scut1 (i) toward the cut line Scut2 (i) of the second cut line row 162a, and each cut of the second cut line row 162a is cut. The line is cut from the end of the line Scut2 (i) toward the cut lines Scut1 (i) and Scut1 (i + 1) of the first cut line row 161a. In this way, the tear guide 16 is torn into a zigzag fracture shape between the first cut line row 161a and the second cut line row 162a (note that the first cut line) In each of the row 161a and the second cut line row 162a, a tear that connects adjacent cut lines may partially occur). As a result, the front surface 11 of the box body 10 is torn along the tearing guide portion 16 (first cut line row 161a, second cut line row 162a), and the opening portion 15 is naturally opened. The

  According to the microwave oven boxed pouch according to the first embodiment of the present invention as described above, the box body 10 in which the pouch 20 is housed is simply set in the microwave oven and the heating operation is performed. Since the unsealed portion 15 in front of the box 10 is naturally opened by the expansion of the pouch 20 to be performed, it can be heated in the microwave oven with little effort.

  Note that the tearing guide portion 16 can also be constituted by a first cut line row 161b and a second cut line row 162b as shown in FIG. In this example, one end of each cut line Scut1 (i) of the first cut line row 161b extends obliquely toward one of the cut lines Scut2 (i) of the second cut line row 162b, and the second cut One end of each cut line Scut2 (i) of the line row 162b extends obliquely toward one of the cut lines Scut1 (i + 1) of the first cut line row 161b. Also in this case, the distance between the tip of each of the cut lines in the first cut line row 161b and the opposite cut line of the second cut line row 162b is, for example, about 0.5 mm to 5 mm. Preferably, it is set to about 1 mm to 1.5 mm.

  With such a configuration, when a two-dimensional tension is applied to the front surface 11 of the box body 10 due to the expansion of the pouch 20, from one end of each cut line of one cut line row to the cut line of the other cut line row. It becomes easier to be cut. That is, opening of the opening part 15 becomes easier.

  Further, the tearing guide portion 16 can also be constituted by a first cut line row 161c and a second cut line row 162c as shown in FIG. In this example, both ends of each cut line Scut1 (i) of the first cut line row 161c are directed to any one of the cut lines Scut2 (i) and Scut (i-1) of the second cut line row 162c. Extending diagonally, both ends of each cut line Scut2 (i) of the second cut line row 162c are directed toward one of the cut lines Scut1 (i), Scut1 (i + 1) of the first cut line row 161c. It is designed to extend diagonally. Also in this case, the distance between the tip of the oblique line of each cut line in the one cut line row and the opposite cut line in the other cut line row is preferably about 0.5 mm to 5 mm, for example. It is set to about 1 mm to 1.5 mm.

  With such a configuration, when two-dimensional tension is applied to the front surface 11 of the box body 10 due to the expansion of the pouch 20, from both ends of each cut line of one cut line row to the cut line of the other cut line row. It becomes easier to be cut. That is, the opening of the opening 15 is further facilitated.

  Further, the tearing guide portion 16 can be configured by a first cut line row 161d and a second cut line row 162d as shown in FIG. In this example, as in the example shown in FIG. 3C, both ends of each of the first cut line row 161d and the second cut line row 162d are directed toward the cut line of the other cut line row. It is designed to extend. However, the both ends do not extend diagonally, but extend so as to be perpendicular to each cut line. Also in this case, as in the example shown in FIG. 3C, when two-dimensional tension is applied to the front surface 11 of the box 10 due to the expansion of the pouch 20, both ends of each cut line of one cut line row are arranged. To the other cut line row toward the cut line. Also in this case, the distance between the end of each cut line in one cut line row and the opposite cut line in the other cut line row is, for example, about 0.5 mm to 5 mm, preferably 1 mm to 1 It is set to about 5 mm.

  Further, the tearing guide portion 16 can also be configured by a first cut line row 161e and a second cut line row 162e as shown in FIG. 4B. In this example, each cut line Scut1 (i) of the first cut line row 161e is curved in one direction, and each cut line Scut2 (i) of the second cut line row 162e is curved in the other direction. It has a shape. As a result, both ends of each cut line Scut (i) of the first cut line row 161e extend toward one of the cut lines Scut2 (i) and Scut (i-1) of the second cut line row 162e. Both ends of each cut line Scut2 (i) of the second cut line row 162e extend toward one of the cut lines Scut1 (i) and Scut1 (i + 1) of the first cut line row 161c. Become. Also in this case, the interval between the opposing cut lines of both the cut line trains 161e and 162e is, for example, preferably about 0.5 mm to 5 mm, and preferably set to about 1 mm to 1.5 mm.

  Even in such a configuration, when two-dimensional tension is applied to the front surface 11 of the box body 10 due to the expansion of the pouch 20, the end of each cut line from one end of each cut line is It becomes easier to be cut toward the incision line. That is, the opening of the opening 15 is further facilitated.

  The configuration of the tear guide portion 16 is not limited to the above-described (FIGS. 3A to 3C, FIGS. 4A and 4B), and the length of each of the cut lines constituting the cut line array. In addition, the shapes such as the interval and the like are arbitrary, and the shapes such as the length and the interval may be uneven depending on the place. For example, as shown in FIG. 4C, a plurality of linear cut lines Scut1 (i), Scut1 (i + 1), Scut1 (i + 2),... Constituting the first cut line row 161f. And the lengths of the plurality of straight branch lines Scut2 (i), Scut2 (i + 1),... Constituting the second cut line row 162f may be non-uniform. Further, even if the shape of each of the cut lines constituting the first cut line row or the second cut line row is different, the shape of each cut line constituting the first cut line row (for example, linear) ) And the shape (for example, arc shape) of each cut line constituting the second cut line row may be different.

  With respect to four types of boxes having different configurations of the tearing guide portion 16, the inner pouch (packaging bag) was actually heated by a microwave oven to perform an opening experiment.

  As shown in FIG. 4 (a), a first box with a tear guide 16 formed of two cut line rows 161d and 162d in which each cut line is substantially U-shaped (shape 1), FIG. As shown in FIG. 3 (a), a second box having a tear guide 16 formed of two cut line trains 161e and 162e in which each cut line has a curved shape (shape 2) as shown in FIG. As shown in the figure, a third box formed with a tear guide portion 16 composed of two cut line trains 161a, 162a having a straight line shape (shape 3), a tear guide portion having a broken line shape (shape 4) in a row. The experiment was conducted on the fourth box with 16 formed. Each box is a paper box that is a thin rectangular parallelepiped having a length of 175 mm, a width of 130 mm, and a height of 20. The tear guiding portion 16 has a trapezoidal shape as shown in FIGS. .

  For the first box, the second box, and the third box, the interval between the two cut line rows constituting the tear guide 16 is 1.5 mm at the narrowest portion, and each cut line The spacing between adjacent score lines in the row was 5 mm. About the 4th box, the length of each cut line of a dashed line shape was 5 mm, and the interval of adjacent cut lines was 1 mm.

  The pouch (packaging bag) housed in each box has a configuration shown in FIG. 5 that protrudes on the back surface due to an increase in internal pressure (width 130 mm, length 175 mm), and repacks a commercially available retort curry 210 g into the pouch. did.

Each box (first box to fourth box) containing the pouch was heated for 2 minutes in a microwave oven with an output of 500 W, and the opened state of each box was visually observed. The results are shown in Table 1.

  First box (shape 1 cut line, 2 rows: see FIG. 4 (a)), second box (shape 2 cut line, 2 rows: see FIG. 4 (b)), and third box All of the boxes (shape 3 cut lines, 2 rows: see FIG. 3A) were smoothly opened along the tear guide 16 along with the expansion of the pouch. In particular, the first box was opened smoothly. The fourth box (a row of dashed cut lines) takes time until it is completely opened, and in some cases, it is broken from the tear guide 16 or the box body is deformed. There was a thing.

  In the first embodiment described above, the tear guide 16 is formed in a substantially trapezoidal shape (see FIGS. 1 and 2), but is not limited thereto. For example, as shown in FIG. 7, a substantially parabolic tear guide 17 can be formed on the front surface 11 of the box 10. In addition, a tear guide 18 having a shape as shown in FIG. 8 can be formed on the front surface 11 of the box 10. In this case, the tear guide portion 18 includes two inclined line portions 18a and 18b extending from both corners of the front surface 11 toward the central portion, and a linear portion 18c extending downward from the vertex where the inclined line portions 18a and 18b intersect. Consists of Further, a tear guide 19 having a shape as shown in FIG. 9 can be formed on the front surface 11 of the box 10. In this case, the tear guide portion 19 includes inwardly inclined line portions 19a and 19b extending obliquely inward from both corners of the front surface 11, a horizontal line portion 19c connecting the inwardly inclined line portions 19a and 19b, and an inward direction. An outer inclined line portion 19d extending diagonally outward from a connection point between the inclined line portion 19a and the horizontal line portion 19c, and an outer inclined line extending diagonally outward from a connection point between the inner inclined line portion 19b and the horizontal line portion 19c. It is comprised from the part 19e. Two inwardly inclined line portions 19a and 19b and a horizontal line portion 19c are connected in a trapezoidal shape.

  In the examples shown in FIG. 8 and FIG. 9, an auxiliary tear guide portion (straight line portion 18c or outward inclined line portion 19d) that radially extends from the tear guide portion constituting the outline of the unsealed portion to the outside of the unsealed portion. 19e), the tearing of the unsealed portion can be induced smoothly, and the deformation of the main body of the box 10 can be prevented.

  Each of the tear guide portions 17, 18, and 19 shown in FIGS. 7 to 9 has two cut line arrays (FIG. 3, FIG. 3) arranged at a predetermined interval, like the above-described tear guide portion 16. (See FIG. 4).

  Next, a microwaveable boxed packaging bag (pouch) according to a second embodiment of the present invention will be described. The microwave oven pouch according to the second embodiment has an opening instead of the unsealing portion 15 (see FIGS. 1 and 2) formed by the tearing guide portion 16 in the box in which the pouch is stored. The cover part which covers is provided.

  The box 30 used in the microwave oven boxed pouch according to the second embodiment is configured as shown in FIGS. 10 is a perspective view of the box, and FIG. 11 is a development view of the box.

  10 and 11, a box 30 (decoration box) used for the microwave box pouch includes a front surface 31 and a back surface 32 facing each other, as in the case of the first embodiment described above. It has a flat rectangular parallelepiped shape having side surfaces (upper side surface 33a, lateral side surface 33b, lower side surface 33c, and lateral side surface 33d) continuous to the edges of the front surface 31 and the back surface 32. The box body 30 is assembled from a developed paper (see FIG. 7). Specifically, a rectangular front surface 31, a back surface 32, a strip-shaped upper side surface 33 a, one lateral side surface 33 b, a lower side surface 33 c, the other lateral side surface 33 d, and pasting margins 34 aa, 34 ab, 34 ac, 34 b, 34 ca, A box 30 as shown in FIG. 6 is formed by folding and bonding the developed paper composed of the substantially trapezoidal lid portion 35 connected to 34 cb and 34 cc and the upper side surface 33 a.

  An opening 38 is formed in a portion of the front surface 31 that faces the lid portion 35 that is bent with respect to the boundary line 35a of the upper side surface 33a. Then, when the developing paper shown in FIG. 11 is assembled in the box 30 as shown in FIG. 10, the lid 35 covers the opening 38 formed on the front surface 31, and the peripheral portion of the lid 35 and the opening The peripheral edge portion of 38 is bonded by a hot melt adhesive or the like.

  The pouch 20 is the same as that used in the first embodiment (see FIGS. 5 and 6), and the opening 38 (lid portion) in which the steam vents 21a, 21b, and 21c are formed in the front surface 11. 35) so as to be opposed to 35). In addition, the pouch 20 has a folded portion that protrudes toward the back surface 32 due to an increase in internal pressure at a portion corresponding to the opening 38 (lid portion 35).

  The pouch 20 housed in such a box 30 is heated by the microwave oven, and the pouch 20 expands. In particular, a portion (folded portion) corresponding to the opening 38 of the expanding pouch 20 protrudes toward the back surface 32 side. Then, the lid 35 is strongly pushed outward by the pouch 20 through the opening 38. Further, heat from the heated pouch 20 is applied to the bonding portion between the peripheral portion of the lid portion 35 and the peripheral portion of the opening 38. The bonded portion of the lid portion 35 that is strongly pressed outward while being heated in this manner is peeled off from the peripheral portion of the opening 38, and the lid portion 35 is opened with the boundary line 35a with the upper side surface 33a as a hinge portion. Then, the portions where the steam vents 21a, 21b, and 21c of the pouch 20 are exposed from the opening 38 of the box 30, and when the internal pressure of the pouch 20 exceeds the limit, steam is steamed from the steam vents 21a, 21b, and 21c. Erupts. Thereby, heating by the microwave oven is made while preventing the internal pressure of the pouch 20 from rising excessively.

  According to the microwave oven boxed pouch according to the second embodiment of the present invention, as in the first embodiment, the box body 30 in which the pouch 20 is placed is set in the microwave oven as it is and heated. Since only the operation is performed, the lid portion 35 of the box 30 is naturally opened by the expansion of the heated pouch 20, so that it can be heated in a microwave oven with little effort. Become.

  In the second embodiment described above, the lid portion 35 has a structure that can be bent with the boundary line 35a with the upper side surface 33a of the box body 30 as a hinge, but the lid body 35 is completely separated. It may be a structure. In this case, the peripheral portion of the entire circumference of the lid 35 is bonded to the peripheral portion of the opening 38 with a hot melt adhesive. In the case of using the box body 30 having the structure in which the lid portion 35 is separated in this way, it is not necessary to take a protruding portion corresponding to the lid portion 35 on the developing paper for forming the box body 30, and thus the box body 30 is manufactured. It is possible to improve the utilization efficiency of the paper when doing so.

  In the case where the lid 35 is completely separated, a material different from that of the box 30 such as a plastic film or a sheet can be used as the material of the lid 35.

  Moreover, in each embodiment mentioned above, the pouch 20 has the folding | returning part 22 (refer FIG. 5 (a), (b)), and the folding | returning part 22 is in the state accommodated in the box 10 by internal pressure rise. Although it protrudes to the back surface 12 side, the structure of the pouch 20 is not limited to this. Even in the case of a normal flat bag type pouch that does not protrude due to an increase in internal pressure, the tear guiding portion 16 formed on the front surface 11 of the box body 10 is torn to open the opening portion 15 due to its expansion. You can also. Further, the present invention is not limited to the flat bag type, and it can be applied to a standing type pouch or even one having a steam vent at the bottom seal portion (see JP-A-10-230979).

  Specifically, as the pouch 20 to be stored in the box body 10, a so-called branch type pouch (see, for example, JP-A-2003-81360) as shown in FIGS. It can also be used. This branch type pouch 20 has a branch part 23 formed with steam vents 21 a, 21 b, 21 c at the tip, and is housed in the box 10 so that the branch part 23 faces the front surface 11. . When such a branch type pouch 20 is used, when the internal pressure of the pouch 20 is increased by heating of the microwave oven, the pouch 20 expands and the branch portion 23 formed with the steam vents 21a, 21b, 21c is formed in a box. 10 protrudes toward the opening 15 formed on the front surface 11, and the opening 15 is more strongly pressed by the branch 23 in addition to the expansion of the entire pouch 20. As a result, the front surface 11 of the box body 10 is torn relatively easily along the tearing guide portion 16, and the opening portion 15 is more easily opened.

  Preferable materials constituting the box 10 that accommodates the microwave oven pouch 20 include paper, synthetic paper, and a composite material made of paper and plastic. In each of the above-described embodiments, the inside of the box body 10 can be seen from a predetermined portion of the box body 10 (a predetermined portion of the front surface 11) using a transparent film or a transparent sheet.

  As described above, the boxed packaging bag for a microwave oven according to the present invention has an effect that it can be heated in a microwave oven as little as possible, and a steam vent is formed in the microwave oven. It is useful as a boxed packaging bag for a microwave oven having a structure in which a packaging bag such as a pouch that can be heated is stored in a box.

It is a perspective view which shows the box in the packaging bag (pouch) for microwave ovens concerning the 1st Embodiment of this invention. It is an expanded view of the box shown in FIG. It is a figure which shows the example of the cut line line | wire which comprises the tearing induction part formed in the box front surface shown in FIG. It is a figure which shows the example of the cut line line | wire which comprises the tearing induction part formed in the box front surface shown in FIG. They are sectional drawing (a) which shows the state which the pouch stored in the box is expanding, and perspective view (b) which shows the expanded state of this pouch. It is a perspective view which shows the state which the opening part of the box front surface was open | released and the pouch was exposed when it heated with the microwave oven. It is a figure which shows the 1st modification of the tearing guidance part formed in the front surface of a box. It is a figure which shows the 2nd modification of the tearing guidance part formed in the front surface of a box. It is a figure which shows the 3rd modification of the tear guide part formed in the front surface of a box. It is a perspective view which shows the box in the packaging bag (pouch) for microwave oven boxes concerning the 2nd Embodiment of this invention. It is an expanded view of the box shown in FIG. The modification of the pouch stored in a box is shown, a sectional view (a) which shows the state where the pouch is expanding, and the perspective view (b) which shows the expanded state of the pouch.

Explanation of symbols

10, 30 Box 11, 31 Front 12, 32 Back 13a, 33a Upper side 13b, 33b Lateral side 13c, 33c Lower side 13d, 33d Lateral side 15 Opening part 15a Boundary line 16, 17, 18, 19 Tear guide part 18 Opening 14aa, 14ab, 14ac, 34aa, 34ab, 34ac Pasting 14b, 34b Pasting 14ca, 14cb, 14cc, 34ca, 34cb, 34cc Pasting 161a, 161b, 161c, 161d, 161e, 161f First cut line 162a, 162b, 162c, 162d, 162e, 163f Second cut line array 20 Pouch (packaging bag)
21a, 21b, 21c Vapor vent part 22 Folding part 23 Branching part 35 Lid part 35a Boundary line 38 Opening

Claims (10)

A box packaging for a microwave oven having a structure in which a packaging bag for a microwave oven in which a steam vent is formed is housed in a box having a front surface and a back surface facing each other, and a side surface connected to an edge of the front surface and the back surface. A bag,
The front of the box is provided with an opening portion that is opened by expansion associated with an increase in internal pressure of the packaging bag during heating by a microwave oven,
The said packaging bag was stored in the said box so that the said vapor release part might oppose the said opening part, The packaging bag containing the box for microwave ovens characterized by the above-mentioned.   2. The microwave oven box according to claim 1, wherein a part of the packaging bag corresponding to the unsealed portion protrudes to the back side due to an increase in internal pressure in a state of being accommodated in the box. Packaging bag.   The said packaging bag is the state accommodated in the said box, The site | part in which the steam release part was formed protrudes toward the said opening part by internal pressure rise, The said claim | item 1 characterized by the above-mentioned. Boxed packaging bag for microwave ovens.   4. The microwaveable boxed packaging bag according to any one of claims 1 to 3, wherein the unsealing portion is formed by a tearing guide portion that guides the tearing by a continuous cut line.   The cut guide section includes a first cut line array configured by connecting a predetermined length of cut lines, and a second cut line array configured by connecting a predetermined length of cut lines, The packaging box containing a box for microwave oven according to claim 4, wherein one cutting line array and the second cutting line array are arranged at a predetermined interval.   The gap between two adjacent cut lines in the first cut line row is opposite to any one of the second cut line rows, and the gap between two adjacent cut lines in the second cut line row is 6. The microwaveable boxed packaging bag according to claim 5, wherein the gap is opposed to any one of the first cut lines.   At least one cut line of at least one of the first cut line row and the second cut line row is formed so that at least one end thereof faces the cut line of the other cut line row. Item 7. A packaging bag for a microwave oven according to item 6.   8. The microwaveable boxed packaging bag according to claim 1, wherein the opening portion has a structure that is cut open while leaving a hinge portion that becomes a boundary with the side surface of the front surface. 9.   4. The microwaveable boxed packaging bag according to claim 1, wherein a lid is adhered to the front surface of the unsealed portion so as to cover an opening formed on the front surface. 5.   The said lid body becomes a structure extended from the edge part of the said front side of the said side surface, The boxed packaging bag for microwave ovens of Claim 9 characterized by the above-mentioned.

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