JP2011219121A - Package for microwave oven - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a package for a microwave oven, which securely maintains a state that an opening section is opened, after the opening section of a box is opened.SOLUTION: The package for the microwave oven includes: the box 10 in which the opening section 15 which can be opened is provided at a front face 11; and a packaging bag 20 in which steam releasing sections 21a, 21b and 21c are formed and accommodated in the box 10 so that the steam releasing section faces the opening section 15. A side face at least includes a first side face 13a, and a second side face 13b and a third side face 13d which face each other with the first face interposed in-between. The opening section 15 is opened to the first face side 13a from a border 16 between that and the non-opening section 16. The border between the opening section 15 and the non-opening section 16 continues to each of the second side face 13b and the third side face 13d through the front face 11, and extends to a corner section where each of the second side face 13b and the third side face 13d intersects the first side face 13a and a rear face 12.

Description

  The present invention relates to a package for a microwave oven having a structure in which a packaging bag such as a pouch that is formed with a steam vent and can be heated in a microwave oven is housed in a box.

  2. Description of the Related Art Conventionally, there has been proposed a microwave heating packaging body in which a food packaging bag (pouch) provided with a relief port (steam vent) that can be heated in a microwave oven is housed in a box. (See Patent Document 1). In this microwave oven package, a relief port (steam vent) is formed to alleviate an increase in internal pressure when the packaging bag is heated, and the packaging bag is formed with an openable opening portion. The box is housed with its relief port facing the separation opening. And the food content in a packaging bag is heated with a microwave oven in the state which opened the cutting opening part of the box, and exposed the relief port of the packaging bag. When the packaging bag in the box expands due to this heating and the internal pressure exceeds the limit, steam blows out from the relief port, and the edible contents in the packaging bag are heated while maintaining the pressure inside the packaging bag appropriately. Cooked.

  In addition, another microwave oven heated package having a structure in which a sealed packaged food B (packaging bag) that can be heated in a microwave oven is housed in a box A has been proposed (see Patent Document 2). In this microwave oven package, the top wall breaking line 11 extending between the side walls 3 and 3 of the top wall 1 of the box A and the front wall 4 from both ends through the side walls 3 and 3 and the bottom wall 2. When the side wall breaking line 31 and the bottom wall breaking line 21 are broken, the box A is opened, and the internal sealed packaged food (packaging bag) B is exposed. Specifically, the top wall 1, both side walls 3, 3 and the bottom wall 2 are formed using the boundary between the front wall 4 and the bottom wall 2 left by the break of the lines 11, 31, 21 as a hinge. The portion on the front wall 4 side from the lines 11, 31, 21 rises by rotating until the front wall 4 and the bottom wall 2 are in the same plane, and the box A is opened. And the box A opened in this way and the sealed packaged food B exposed from the box A are put together into a microwave oven, and the sealed packaged food B is heated. Also in this case, a steam escape portion 621 is formed in the packaging bag 6 of the sealed packaged food B to be heated, and the pressure in the packaging bag 6 is increased by the steam jetting from the steam escape portion 621 during heating. While properly maintained, the edible content is cooked.

  According to each microwave oven packaging body as described above, the food contents in the packaging bag can be heated by the microwave oven by simply opening the box body and without taking out the packaging bag from the box body. It is possible to easily and easily prepare for cooking with a microwave oven. Furthermore, since the heating by the microwave oven is performed while the packaging bag is contained in the box, the food contents in the packaging bag can be heated in a stable state. In addition, even after cooking, the box can be safely taken out of the microwave oven without directly touching the heated pouch.

  In the case of the latter example (see Patent Document 2), both corners sandwiched between the front wall 4 and the side walls 3 and 3 of the bottom wall 2 are included in the rotating part and rise, so that the box A is In the opened state, both corners of the bottom wall 2 come into contact with the edge of the sealed packaged food B. For this reason, the part which the box A raised during heating does not return, the expansion of the packaging body 6 inside the box A is hindered, or the part which has risen by the steam ejected from the steam escape portion 621 of the packaging bag 6 Can be prevented from getting wet.

JP 2001-39476 A JP 2002-019776 A

  As described above, the opening part of the box is opened to expose the steam vent part (relief port) of the packaging bag, and the contents of the packaging bag can be heated by the microwave oven in that state. In the package, the box can be easily opened, and the opened opening part is returned to the heating state and covers the packaging bag. It is important to be able to prevent as much as possible.

  In the latter example described above (see Patent Document 2), both corners sandwiched between the front wall 4 and the side walls 3 and 3 of the bottom wall 2 are included in the rotating part and rise, so the box A is opened. In doing so, both corners of the bottom wall 2 may interfere with corners of the sealed packaged food B inside, and the box A may not be opened smoothly.

  The present invention has been made in view of the above circumstances, and without unhindering the smooth opening of the box, after opening the opening of the box, the state where the opening is opened more reliably A package for a microwave oven that can be maintained is provided.

  A microwave oven package according to the present invention has 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 microwave oven packaging body having a packaging bag formed in the box so that a punching portion is formed and the steam venting portion faces the opening portion, wherein the side surface includes the first side surface and the packaging surface. It has at least a second side surface and a third side surface facing each other with the sandwiched portion, and the opening portion opens from the boundary with the non-opening portion to the first side surface, The boundary with the unsealing part continues to each of the second side surface and the third side surface across the front surface, and at each corner where the second side surface and the third side surface intersect with the first side surface and the back surface. It becomes the structure extended so that.

  With such a configuration, the opening part of the box body in which the packaging bag is stored includes the respective parts of the front surface, the second side surface, and the third side surface following the first side surface inside the boundary with the non-opening portion. When opening the opening portion from the boundary with the non-opening portion to the first side surface, the opening portion includes a corner portion where the first side surface, the second side surface and the back surface intersect, and the first side surface, the third side surface and the back surface. Are opened while rotating like a hinge at the boundary between the first side surface and the back surface, which is a straight line connecting the corners where the two intersect. Since the boundary of the unsealed portion of the unsealed portion reaches the corner where the first side surface and the back surface intersect each of the second side surface and the third side surface, when the unsealed portion is opened, There is no interference between the packaging bag and the opening. Thus, the packaging bag partially exposed from the box whose opening is opened is expanded by water vapor generated inside when heated by a microwave oven, and when its internal pressure exceeds a certain limit, It ejects from the steam vent. Therefore, the contents in the packaging bag can be cooked at an appropriate pressure.

  In the microwave oven package according to the present invention, when the microwave oven package is heated by the microwave oven in a state where the opening portion is opened, an edge on the first side surface of the packaging bag that expands It can be set as the structure which becomes 2 times or more of the height of the said side surface of the said box.

  With such a configuration, the box body is opened by the edge of the packaging bag expanded by heating the microwave oven so that the height of the edge on the first side surface becomes twice or more the height of the side surface of the box body. Since the part is effectively supported, it is possible to reliably prevent the unsealed part from being covered with the packaging bag from which steam is spouted from the steam venting part during heating. It becomes possible to reliably prevent the unsealed portion from getting wet by the steam ejected from the portion.

  Moreover, in the microwave packaging body according to the present invention, after the heating by the microwave oven is finished, the height of the edge on the first side surface side of the packaging bag is 2 of the side surface height of the box body. It can be set as a structure so that it may be maintained more than twice.

  With such a configuration, after the heating by the microwave oven is finished, the height of the edge on the first side is maintained at least twice the height of the side of the box by the edge of the packaging bag. The unsealed portion is effectively supported, so that the unsealed portion can be reliably prevented from covering the heated packaging bag. As a result, the unsealed portion that covers the unpacking bag from the box body It can be prevented from becoming difficult.

  Furthermore, the packaging body for microwave ovens which concerns on this invention WHEREIN: The said packaging bag can be set as the structure which has the folding | turning part which protrudes to the said back surface side of the said box at the time of the heating by the said microwave oven.

  With such a configuration, the folded portion of the packaging bag protrudes to the back side of the box when heated by a microwave oven, so that the portion where the vapor vent is formed rises and the contents are ejected when steam is ejected. Prevents accidental spills. Moreover, it can prevent that the open | released opened part returns and covers a packaging bag by the edge of the 1st side surface side of the packaging bag near this raised part.

  According to the microwaveable boxed packaging bag of the present invention, the unsealing portion is a straight line connecting the corner portion where the first side surface, the second side surface and the back surface intersect with the corner portion where the first side surface, the third side surface and the back surface intersect. When the boundary between the first side surface and the back surface is opened while rotating like a hinge, the first side surface connected to each of the front surface, the second side surface, and the third side surface of the unsealed portion is outward with the hinge as an axis. Since it will be in the state which inclined, the said opening part will not return easily with the weight of each part connected to the 1st side surface. Further, the packaging bag that expands when heated prevents the first side surface inclined outward when the opening portion is opened from returning to the original state. Therefore, after opening the opening part of a box, the state where the opening part was opened can be maintained more certainly. Furthermore, since the inner packaging bag and the opening portion do not interfere when the opening portion is opened, smooth opening of the box body is not hindered.

It is a perspective view which shows the external appearance of the package for microwave ovens concerning embodiment of this invention. It is an expanded view of the box used for the packaging body for microwave ovens shown in FIG. It is the elements on larger scale which show the detailed structure of the opening part formed in the box. It is sectional drawing which shows the cross-section of the package for microwave ovens shown in FIG. It is a perspective view which shows the state which open | released the opening part of the box of the package for microwave ovens shown in FIG. It is a side view which shows the state which open | released the opening part of the box of the package for microwave ovens shown in FIG. It is a perspective view which shows the state which the pouch accommodated in the box body expanded. It is a perspective view which shows the state at the time of heating the package for microwave ovens of the state shown in FIG. 5 with a microwave oven. It is a side view which shows the state at the time of heating the package for microwave ovens of the state shown in FIG. 5 with a microwave oven. It is a side view which shows the state at the time of having finished heating the packaging body for microwave ovens of the state shown in FIG. 5 with a microwave oven.

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

  The microwave oven package according to the embodiment of the present invention is configured as shown in FIGS. 1 and 2. 1 is a perspective view showing the appearance of the microwave packaging body, and FIG. 2 is a development view of a box used in the microwave packaging body shown in FIG.

In FIG. 1, a box (decoration box) 10 used for the microwave packaging body is made of paper (eg, coated cardboard 310 g / cm ² ), and has a rectangular front surface 11 and It is formed of a back surface 12 and four side surfaces including an upper side surface 13a, a lateral side surface 13b, a lower side surface 13c, and a lateral side surface 13d that are connected to the edges of the front surface 11 and the back surface 12. Although not shown in FIG. 1, a so-called flat bag type microwave pouch 20 (packaging bag) formed of a plastic sheet and filled with contents such as food is contained in the box 10. (See FIGS. 4 to 7 described later).

  The box 10 is assembled from the developed paper shown in FIG. The developed paper includes a rectangular (rectangular) front surface 11 and 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 adhesive margins (glue surfaces) 14aa and 14b. , 14ca and folded pieces 14ab, 14ac, 14cb, 14cc. As shown in FIG. 1, by folding and bonding the developing paper, the front surface 11 and the back surface 12 facing each other, the upper side surface 13a and the lower side surface 13c facing each other, and the two lateral side surfaces 13b facing each other, A box 10 having a flat rectangular parallelepiped shape is formed by the four side surfaces 13d. Specifically, the adhesive margin 14 b protruding from the lateral side surface 13 b is bonded to the back side of the back surface 12, whereby the lateral side surface 13 b connected to the front edge is joined to the back surface 12. Then, the folding margins 14ab, 14ac, 14cb, 14cc are folded inward, the adhesive margin 14aa is adhered to the back side of the upper side surface 13a, and the adhesive margin 14ca is adhered to the rear side of the lower side surface 13c, whereby the front surface 11 and the rear surface 12 are adhered. The box 10 is formed by joining the four side surfaces of the upper side surface 13a, the lower side surface 13c, and the lateral side surfaces 13b and 13d. When the developed paper shown in FIG. 2 is assembled into the box 10 shown in FIG. 1, a perforation line 18 is formed at the boundary between the back surface 12 and the adhesive margin 14aa, which is the boundary between the upper side surface 13a and the back surface 12. The perforation line 18 weakens the force for restoring the upper side surface 13a and the back surface 12 at the boundary between the upper side surface 13a and the back surface 12 (restoration weakening portion).

  Further, referring to FIGS. 2 and 3 together with FIG. 1, the box body 10 is opened from the front surface 11 to both lateral side surfaces 13b (second side surface) and 13d (third side surface) sandwiching the upper side surface 13a (first side surface). A possible opening 15 is formed. A cut line string in which cut lines are connected is formed at a boundary 16 between the unsealed part 15 and the unopened part, and the uncut part of the cut line line is cut off in a chain manner so that the unsealed part 15 moves upward from the boundary 16. Open in the direction of the side surface 13a. A boundary 16 between the unsealed portion 15 and the unopened portion of the unsealed portion 15 includes a first portion 161 having a substantially V-shape that opens toward the upper side surface 13 a on the front surface 11, and a front surface following one end of the first portion 161 11 extends from one side surface 13b to the corner C1 where the side surface 13b intersects the upper side surface 13a and the back surface 12, and from the front surface 11 following the other end of the first portion 161. The third portion 163 extends to the other side surface 13d and reaches the corner C2 where the side surface 13d intersects the upper side surface 13a and the back surface 12. On the developed paper of the box 10, the first portion 161 and the second portion 162 of the boundary 16 continue linearly, and the first portion 161 and the third portion 163 continue linearly. For this reason, it is possible to relatively easily form the cut line array at the boundary 16 with the non-opening portion of the opening portion 15 in the box 10.

  A finger hooking portion 17 is formed on the inner side of the top portion of the first portion 161 that is V-shaped at the boundary 16 with the non-opening portion of the opening portion 15. The finger hook portion 17 is defined by a perforation line 17a, and a cut line 17b is formed. Thereby, the finger-hanging part 17 can be pushed inside the front surface 11 with a finger.

  As shown in FIGS. 4, 5, and 6, the flat bag type pouch 20 housed in the box 10 is formed with steam vents 21 a, 21 b, and 21 c side by side. Each of the steam vents 21a, 21b, and 21c has a structure in which the periphery of the hole (weakening part) is sealed as described in, for example, Japanese Patent Application Laid-Open No. 2002-249176, 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). The structure of the steam vents 21a, 21b, and 21c is not limited to the above-described structure, and a predetermined portion of the edge seal part of the pouch 20 is narrowed and protruded inward, with an easily peelable film interposed therebetween. When the internal pressure of the pouch 10 is increased, such as sealing, the seal of the predetermined part is peeled off preferentially, and a heating element that generates heat by microwave irradiation is attached to a film material (sheet), A known material such as one in which the film material is melted or the seal strength is reduced to allow vapor to escape 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 part 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 expands, and the detailed structure thereof is described in Japanese Patent Application Laid-Open No. 2006-62672.

  A case where the contents of the pouch 20 housed in the box 10 are heated in a microwave oven will be described.

  The first portion 161 of the front surface 11 which is a boundary 16 with the non-opening portion of the opening portion 15 by pulling the finger hooking portion 17 of the opening portion 15 of the box body 10 inwardly and pulling it up with a finger. The cut lines formed in each of the second portion 162 of the one side surface 13b and the third portion 163 of the other side surface 13d are sequentially cut, and the unsealed portion 15 is separated from the boundary 16 with the unopened portion. Opened in the direction of the upper side surface 13a. At this time, as shown in FIGS. 5 and 6, the unsealed portion 15 includes an upper side surface 13 a, a corner portion C <b> 1 where one lateral side surface 13 b and the rear surface 12 intersect, an upper side surface 13 a, the other lateral side surface 13 d and the rear surface 12. A straight line connecting the intersecting corner C2 is opened while rotating at the boundary between the upper surface 13a and the rear surface 12 where the perforation line 18 is formed like a hinge. When the opening part 15 is opened, the part where the steam vents 21a, 21b, 21c of the pouch 20 are formed, that is, the edge part on the upper side surface 13a side of the pouch 20 is exposed.

  Thus, the microwave oven packaging body in which the portions where the steam vents 21a, 21b, and 21c of the pouch 10 are exposed from the box body 10 in which the opening portion 15 is opened is left in the microwave oven as it is. Set to When the food contents in the pouch 20 are heated by the microwave oven, the pouch 20 expands as shown in FIG. 7 by the water vapor generated from the heated food contents and comes into contact with the back surface 12 of the box 10. The folded-back portion 22 expands and protrudes. Due to the expansion of the pouch 20 and the protrusion of the folded portion 22, as shown in FIGS. 8 and 9, the portions where the steam vents 21 a, 21 b, and 21 c of the pouch 20 are formed in the box body 10 rise. The edges of the edge portions where the steam vents 21a, 21b, and 21c are formed are directed toward the upper side surface 13a of the box 10, and for example, the upper side surface 13a of the pouch 20 that expands by heating of the microwave oven. The shape and capacity of the pouch 20, the structure of the folded portion 22, and the like are determined so that the side edge height β 1 is at least twice the side surface height α of the box 10. As shown in FIG. 9, when the internal pressure of the expanding pouch 20 exceeds a certain limit, steam is spouted from the steam vents 21 a, 21 b, 21 c formed on the raised part of the pouch 20, and the food content of the pouch 20 Is cooked with moderate pressure.

  When heating by the microwave oven is completed, the generation of steam in the pouch 20 stops and the steam vents 21a, 21b, and 21c become resistance to steam escape, but the internal pressure gradually decreases and the pouch 20 contracts. . At that time, the folded-back portion 22 that protrudes is reversed so that it is difficult to return to its original state. Even after the heating is finished, as shown in FIG. 10, the portions where the steam vents 21 a, 21 b, 21 c of the pouch 20 are formed. The raised state is maintained.

  Since the unsealed portion 15 opened as described above is in a state in which the upper side surface 13a connected to the respective portions of the front surface 11 and both lateral side surfaces 13b and 13d is tilted outward with the boundary with the back surface 12 as a hinge, It is difficult for the upper side surface 13a to return to the original state due to the weight of each part connected to it. Further, since the perforation line 18 is formed at the boundary between the upper side surface 13a and the back surface 12, and the force for returning the upper side surface 13a and the back surface 12 at the boundary is weakened, the unsealed portion 15 is returned to the pouch 20 Do not come to touch. Further, the central portion of the unopened portion of the front surface 11 is raised while the central portion of the back surface 12 is pressed by the expanding pouch 20, and the back surface 12b is lifted by the rising of the lateral side surfaces 13b and 13d that are swelled by the front surface 11. Adjacent portions to both lateral side surfaces 13b and 13d are lifted up so that the back surface 12 is curved. The curvature of the back surface 12 makes it difficult for the upper side surface 13a following it to rise. Further, the expanding pouch 20 prevents the upper side surface 13a that has fallen outward from returning to its original state. As a result, while the food content in the pouch 20 is being cooked, the opened opening 15 can be more reliably maintained in its opened state.

  Further, during heating by the microwave oven, the height β1 of the edge on the upper surface 13a side of the expanding pouch 20 becomes more than twice the height α of the side surface of the box 10 (see FIG. 9). Even if 15 is covered, it can be pushed back by raising the edge of the pouch 20. Since the jet of steam does not start while the pouch 20 is raised, the unsealed portion is not wetted by the steam. Further, since the raised state is maintained even after the heating is completed, it is possible to more reliably prevent the opened unsealed portion 15 from covering the pouch 20. In addition to the one described in Japanese Patent Application Laid-Open No. 2006-62672, for example, the pouch having the action of raising the edge provided with the steam release portion as described in Japanese Patent Application Laid-Open No. 2003-81360, for example, A pouch provided with a steam vent is also applicable.

  Thus, according to the microwave oven package according to the embodiment of the present invention, the food in the pouch 20 in which the opening 15 is opened and the portions of the steam vents 21a, 21b, and 21c are exposed from the box 10. When the contents are heated by the microwave oven, the unsealed portion 15 can be reliably maintained in its opened state. Therefore, the unsealed portion 15 prevents the expansion of the pouch 20 or the steam vent portion 21a, It is possible to reliably prevent the opening portion 15 from getting wet by the steam ejected from 21b and 21c. Further, since the pouch 20 inside the box 10 and the opening part 15 do not interfere when the opening part 15 is opened, the box body 10 can be opened smoothly without being caught.

  In the microwave oven package according to the embodiment of the present invention, the second portion 162 and the third portion 163 formed on the side surfaces 13b and 13d of the boundary 16 with the non-opening portion of the opening portion 15 are However, the second portion 162 and the third portion may be curved lines up to the corner portions C1 and C2 or may be broken lines.

  In addition, a cut line array is formed at the boundary 16 between the unsealed portion 15 and the unopened portion so that the unsealed portion 15 is opened from the boundary 16, but the box having an opening corresponds to the unsealed portion 15. The box 10 as a whole may be formed by pasting the portions (see 2009-51562). In this case, the unsealed portion is opened from the boundary 16 toward the upper side surface 13a by peeling off the pasted portion.

  As described above, the microwave packaging body according to the present invention has an effect that the opened state of the opened part can be maintained more reliably after the opened part of the box is opened. It is useful as a packaging body for a microwave oven having a structure in which a packaging bag such as a pouch capable of being heated in a microwave oven with a vapor vent is formed.

10 box body 11 front surface 12 back surface 13a upper side surface (first side surface)
13b Lateral side (second side)
13c Lower side surface 13d Lateral side surface (third side surface)
15 opening part 16 boundary 161 first part 162 second part 163 third part 18 perforation 14aa, 14ca glue margin 14b glue margin 14ab, 14ac, 14cb, 14cc folded piece 20 pouch (packaging bag)
21a, 21b, 21c Vapor vent part 22 Folding part

Claims (4)

A box body having a front surface and a back surface facing each other, and a side surface continuous to an edge of the front surface and the back surface, provided with an opening portion that can be opened on the front surface, and a steam vent portion are formed. A microwave packaging body having a packaging bag housed in the box so as to face the opening portion;
The side surface has at least a first side surface and a second side surface and a third side surface facing each other across the first side surface,
The unsealing portion opens from the boundary with the non-opening portion to the first side surface, and the boundary with the non-opening portion of the unsealing portion extends across the front surface and the second side surface and the first side surface. A microwave oven package extending to reach a corner where each of the second side surface and the third side surface intersects with the first side surface and the back surface following each of the three side surfaces.   When the microwave oven package is heated by the microwave oven in a state where the opening portion is opened, the height of the edge on the first side surface of the packaging bag that expands is the height of the side surface of the box. The package for a microwave oven according to claim 1, which is at least twice the height.   3. The electromagnetic range according to claim 2, wherein after the heating by the microwave oven is finished, the height of the edge on the first side surface side of the packaging bag is maintained at least twice the height of the side surface of the box. Packaging body.   The said packaging bag is a package for microwave ovens in any one of Claims 1 thru | or 3 which has the folding | turning part which protrudes in the said back surface side of the said box at the time of the heating by the said microwave oven.

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