JP2019119464A - Fastening part structure of heating bag - Google Patents

Abstract

To maintain engagement force even when high temperature moisture vapor is generated in a bag, for suppressing opening of the bag.SOLUTION: A fastening part 102 has a belt-state coating part 203 along an opening, similar to an engagement member, on a position separated by a constant or longer distance, from a lower part of one of a male engagement member 202 and a female engagement member 201. The coating part 203 is provided on a lower part of the female engagement part 201, and may be provided on a lower part of the male engagement member 202. The coating part 203 may be stuck to an inner face of a heating bag 101 by heat seal, may be attached to a lower part of the engagement member, or may be integrated with the engagement member.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a heating bag clasp structure, and more particularly, to a heating bag clasp structure that can be used to enclose frozen food or processed food and the like, and can be heated or cooked in a microwave oven.

  A zipper part is provided on the inside of the opening of the bag as a fastener which can be freely opened and closed while sealing various bags such as a packaging bag and a heating bag with a certain degree of sealing or more, and this zipper part Fasteners that seal by engaging the are widely used. For example, it is also used as a fastener for a heating bag which is used when food is heated such as thawing frozen matter with a microwave and warming low-temperature food. In particular, in recent years, not only heating but cooking raw or semi-living foodstuffs or food has been carried out, and various containers for cooking with a microwave oven have been proposed.

  For example, Patent Document 1 discloses a zipper for resealing a cooking fluid Q for the purpose of providing a retort pouch in which the zipper is not soiled before opening, the contents can be filled quickly, and the contents are not leaked. An easy peel portion 14 is fixed to the zipper 15 to fix the cooking fluid Q and to prevent the cooking fluid Q from adhering to the zipper 15, while being fixed by heat sealing on the upper inner side of the side films 11A and 11B. A method for manufacturing a retort pouch has been proposed, which is continuously provided, filled with the cooking fluid Q with the zipper 15 open, and then heat sealed to the easy peel portion 14.

JP, 2014-69888, A

  However, conventional heating pouches, such as retort pouches, can be filled with ingredients and seasoning liquid, and can be closed by engaging the zipper and heated in a microwave oven, but the high temperature water vapor causes the zipper to engage when heated Will be in direct contact with Since the heat resistance of the conventional zipper is about 100 ° C., it is exposed directly to high temperature steam, and the engaging portion loosens and releases steam, and the large opening portion may cause the contents to be ejected inadvertently. Also, there is a problem that the pressure drops sharply, so that the effect of high-pressure cooking by heating using a microwave oven can not be obtained. In fact, when the pressure of water vapor generated from foodstuffs and the like by heating increases, Patent Document 1 provides a mechanism for releasing water vapor at the non-sealed part, but if the heat resistance of the zipper is low, the occlusal structure of the zipper is easily released There is also a risk of spouting the contents.

  The present invention has been made in view of the above-described conventional problems, and the engagement force of a fastener mechanism that can be freely opened and closed by hand, such as a zipper, is not reduced even if high temperature water vapor is generated inside the bag. An object of the present invention is to provide a heating bag fastening structure provided with a non-open covering mechanism.

  In order to solve the above-mentioned problems, the invention according to claim 1 of the present application is a fastening structure of a heating bag, wherein a predetermined tensile force is disposed inside the opening above the heating bag. A sealing means which can be opened and closed, and a covering means which is disposed under the sealing means and which covers the contents or gas so as not to directly come into contact with the sealing means when heating. And a covering means disposed.

  The invention according to claim 2 is characterized in that, in the fastening portion structure according to claim 1, the sealing means is provided along the upper opening on the lower inner surface of the upper opening of the heating bag. .

  According to a third aspect of the present invention, in the fastening structure according to the second aspect, the sealing means includes a pair of engaging members, and a surface opposite to the engaging surface is attached to the inner surface of the heating bag. It is characterized by being

  According to a fourth aspect of the present invention, in the fastening portion structure according to the third aspect, the covering portion is attached to any one lower portion of the engaging member, and the other end of the engaging member is attached when an internal pressure is applied. By contacting the inner surface of the heating bag, the engaging portion is coated so that the contents or the internal gas does not come in direct contact with the engaging portion.

  The invention according to claim 5 is characterized in that, in the fastening portion structure according to claim 4, the covering portion is attached to the inner surface of the heating bag from the one engaging member to a predetermined range below. Do.

  The invention according to claim 6 is the fastening portion structure according to claim 4 or 5, wherein the covering portion is attached to a surface opposite to the engaging surface of any one lower portion of the engaging member, and is heated. It is characterized in that the other of the engaging members approaches the inner surface of the attached heating bag by means of elasticity.

  The invention according to claim 7 is a heating bag having the fastening portion structure according to any one of claims 1 to 6, which is formed by a sheet obtained by laminating a plurality of layers including an inner surface layer. And an opening means for partially opening the enclosed food or water when the enclosed food or water is heated and steam is generated and the internal pressure reaches a predetermined pressure so that the internal pressure does not rise above the predetermined pressure; And the like.

  The invention according to claim 8 is characterized in that, in the heating bag according to claim 7, the opening strength relative to the internal pressure at the time of heating of the sealing means is sufficiently higher than the opening strength of the opening means.

  The invention according to a ninth aspect is characterized in that, in the heating bag according to the seventh or eighth aspect, the opening means includes a flap in which the sheet is formed in a convoluted shape.

  The invention according to claim 10 is characterized in that, in the heating bag according to claim 9, the flap part includes a V-shaped water vapor discharge part which releases water vapor at a predetermined pressure.

  The invention according to claim 11 is characterized in that, in the heating bag according to claim 7 or 8, the opening means includes a water vapor discharge hole by the easily peelable fusion-bonded portion.

  According to the present invention, the sealing means which can be opened and closed with a predetermined tensile force, which is disposed inside the upper opening of the heating bag, and which is disposed below the sealing means, the contents or gas are sealed directly when heated. A covering means for covering so as not to come in contact with the means, and the covering means disposed at a predetermined distance or more from the sealing means, a fastener mechanism which can be freely opened and closed by hand, such as a zipper, Even if high temperature water vapor is generated inside the bag, the engagement force can not be reduced and it can be prevented from opening easily.

It is a perspective view of a heating bag of one embodiment of the present invention. It is a side view of the heating bag of one embodiment of the present invention. It is a top view of the heating bag of one embodiment of the present invention. It is a figure which shows the example which puts a foodstuff in the heating bag of one Embodiment of this invention. It is a figure for demonstrating the operation | movement at the time of the heating of the heating bag of one Embodiment of this invention. FIG. 7 is a perspective view of a heating bag according to another embodiment of the present invention. FIG. 7 is a side view of a heating bag according to another embodiment of the present invention. FIG. 6 is a top view of a heating bag according to another embodiment of the present invention. It is a figure for demonstrating the operation | movement at the time of the heating of the heating bag of another embodiment of this invention. It is a side view of the conventional heating bag. It is a figure for demonstrating the operation | movement at the time of the heating of the conventional heating bag. It is a figure which shows an example of a series of flows of the heating method of the heating bag of one Embodiment of this invention. It is a figure which shows an example of a series of a series of flows of the heating method at the time of using the heating bag of one Embodiment of this invention as a packaging bag of frozen food.

Hereinafter, an embodiment will be described with reference to the drawings with regard to the fastening portion structure of the heating bag of the present invention.
First Embodiment
1 and 2 are a perspective view and a side view of a heating bag according to an embodiment of the present invention. Moreover, FIG. 3 is a top view of the heating bag of this embodiment. The heating bag 101 of the present embodiment encloses frozen food and processed food, and can be cooked by a microwave oven. Therefore, for example, while it is used as a packaging bag for processed foods such as frozen foods and retort foods, it can be cooked with a microwave as it is, but it may be used merely for heating without being used for packaging or transporting food. it can. For this reason, the heating bag 101 of the present embodiment is provided with a zipper-like fastening portion 102 so that the contents can be easily put in and out.

  The fastening portion 102 uses any structure known in the art, and generally comprises a pair of engaging members, which are engaged by forming them into male and female shapes and the like to seal the bag. When opening the bag, the pair of engaging portions can be separated and opened by pulling with a predetermined force. In the heating bag 101 of the present embodiment, by basically closing the fastening portion 102 and performing heating in a closed state, effective heating and heat retention and heating and cooking become possible, but the conventional fastening portion structure As it is, if high temperature water vapor and contents come into direct contact with the fastener during heating, and the heat resistance temperature of the material of the fastener is exceeded, the engagement force of the fastener will decrease and even if particularly large stress does not work There is a risk that the contents will be released by being released.

  Specifically, the problems of the prior art will be described with reference to FIGS. 10 and 11. FIG. FIG. 10 is a side view of the conventional heating bag 1001, and FIG. 11 is a diagram for explaining the operation of the conventional heating bag 1001 when it is heated. The heating bag 1001 according to the prior art has a fastening portion 1002, and the fastening portion 1002 is closed to seal the heating bag 1001 so that the heating can be performed. However, as shown in FIG. To the water vapor, the upper fixing portion 1002 of the heating bag 1001 is exposed, the engagement between the pair of engaging members 1101 and 1102 may be released, and the fixing portion 1002 may be opened to eject the contents.

  The material of the fastening portion such as the conventional zipper is used in consideration of the sealing property when engaged and the like, and the heating bag manufactured solely in consideration of the temperature at the time of heating. The heat resistance is not as high as that of the inner surface, and the inside of the bag is heated to a high temperature, and when exposed to high temperature water vapor, the engagement force of the engaging portion is reduced and it is easily released. On the other hand, if a heat-resistant material that can withstand high temperatures is used for the engaging portion, the sealability at the time of engagement can not be satisfied, and the development of a new material satisfying both conditions leads to an increase in manufacturing cost. The fastening portion 102 of the present embodiment is not easily released at the time of heating by providing the covering portion 203 as described below, without using a high heat resistant material as the material of the engaging portions 201 and 202. By making the structure, it is possible to prevent the contents from spouting carelessly.

  The clasp structure of the heating bag of the present embodiment will be described with reference to FIGS. 1 and 2. The heating bag 101 of the present embodiment is provided with a fastening portion 102 which is a sealing means in a main body for sealing contents such as food. The bottom portion 105 is a gusset and spreads when the content portion is sealed, so that the capacity can be secured. The heating bag 101 includes a front surface member 204 and a back surface member 205 joined to the front surface member 204, and is formed in a bag shape. That is, the front surface member 204 and the back surface member 205 seal the both side edge portions 104 by heat fusion, and the bottom portion 105 is folded inward and formed in a gusset type.

  The front member 204 is formed of a sheet-like flexible film having heat fusion property, and is a substrate obtained by depositing an inorganic compound such as aluminum oxide or silicon oxide on polyester, nylon, polyethylene terephthalate, or a laminate thereof. The layer can be formed by laminating a heat fusible layer made of polypropylene (PP) or the like. Of course, it is optional as long as the members are heat-sealable materials, for example, plastic films having heat-sealing properties used for ordinary heating bags can be applied, for example, having heat-sealing properties. It is possible to use single-layer films and sheets made of a thermoplastic resin, and multilayer films in which a thermoplastic resin having heat fusion property is laminated with another thermoplastic resin, etc. However, the present invention is not limited thereto. Materials can be used.

  As shown in FIG. 2, a male engaging member 202 made of PP or the like is provided on the inner surface of the front member 204 from the front to the back, and similarly engaged with the female engaging member 201 to open and close the upper opening. Seal freely. That is, the fastening portion 102 is a pair of engagement members consisting of a male engagement member 202 and a female engagement member 201 capable of opening and sealing the outer edge of the bag, and the female engagement with the male engagement member 202 The members 201 are in plane contact with each other and sealed. Both engaging members are formed in a band shape, and the surface opposite to the engaging surface is a surface to be stuck to the inside of the heating bag 101, and the surface is open to the inside of the upper opening of the heating bag 101. It is pasted along the department.

  In the present embodiment, the fastening portion 102 has a band-like covering portion 203 along the opening like the engaging member at a position spaced apart from a lower portion of one of the male engaging member 202 and the female engaging member 201 by a predetermined distance or more. Prepare. In FIG. 2, the covering portion 203 is provided at the lower portion of the female engaging member 201, but may be the lower portion of the male engaging member 202. Further, the covering portion 203 may be attached to the inner surface of the heating bag 101 by heat fusion or the like, or may be attached to the lower portion of the engagement member or integrally formed with the engagement member. The covering portion 203 is made of PP or the like and is flexible, but has appropriate elasticity, and is usually deformed while maintaining a constant shape and being subjected to stress or pressure, but desirably having high heat resistance .

  The cross section of the covering portion 203 has a shape along the inner surface of the heating bag opposite to the pasting as shown in FIG. 2, and contacts the inner surface of the heating bag in the normal heating state. However, in the case of heating, which will be described later, the pressure of the water vapor causes the inner surface of the heating bag to be in close contact with the inner surface of the heating bag to cover the entire engaging portion. Therefore, such a shape is not necessary as long as the same action can be obtained at the time of heating.

  In the present embodiment, as shown in FIG. 2, the covering portion 203 is attached below a predetermined distance from the engaging member, but the position is preferably, for example, 10 mm or more below. As described above, by attaching the covering portion 203 at a position spaced apart from the engaging portion by a certain degree or more, the high heat content and the water vapor are blocked by the covering portion 203. Even the effects of heat can be avoided. That is, in the case of an engaging member having low heat resistance, when exposed to heat for a long time, the engaging force is reduced and the engagement may be released to open the opening, but the opening is sufficiently separated from the engaging portion By providing the covering portion 203 at the position, the engaging portion is moved away from the heat source, so that a decrease in the engaging force due to heat can be avoided.

  The heating bag 101 according to the present embodiment may be filled with frozen food or retort food, and may be heated by a microwave oven, or the fastening portion 102 is opened to open ingredients 401 and the like as shown in FIG. 4. Alternatively, the fastener 102 may be closed and heated. As shown in FIG. 4, necessary ingredients 401 such as vegetables are introduced into the heating bag 101 together with the cooking liquid. Since the heating bag 101 is a standing type, when the ingredient 401 is introduced, the gusset 105 formed of the bottom film of the lower part of the heating bag 101 opens and the sense of stability when standing up is improved. Thereafter, the fastening portion 102 is engaged, the opening of the heating bag 101 is closed, and the heating bag 101 is put in the microwave in an upright state and heated for a predetermined time. In this way, the operation at the time of heating with a microwave oven or the like will be described with reference to FIG.

  FIG. 5 is a view for explaining the operation at the time of heating of the heating bag of the present embodiment. In the heating bag 101, the water content of the contents is heated in the microwave oven to become high temperature, and high temperature steam is generated to exert pressure in the direction of the opening of the upper part of the heating bag 101.

  On the other hand, as shown in FIG. 5, when the pressure in the heating bag 101 rises near the retaining part 102, the covering part 203 is on the inner surface of the heating bag opposite to the attached one by the pressure of water vapor. It deforms in such a way as to stick, and covers the vicinity of the engaging portion. For this reason, unlike the case of the conventional heating bag described with reference to FIG. 11, the engagement member is protected from being directly exposed to high temperature water vapor, so that the engagement portion is released and the fastening portion 102 It is released and there is no risk of the contents spouting from the opening. That is, by sticking to the contact portion 503 on the side opposite to the heat fusion of the covering portion 203, the heating is performed with the base portion 206 to which the covering portion 203 of the lower portion of the female engaging member 201 is heat sealed. The bag 101 is inflated. For this reason, high temperature steam can only reach from the base 206 to the contact portion 503, and if the base 206 is set at a sufficiently lower position, heat due to high temperature steam is prevented from affecting the engaging portion can do. Conversely, when the cover is not attached sufficiently downward or upward, the heat transfer from high temperature water vapor or the like can not be suppressed only with the covering part 203, and the engaging part becomes high temperature exceeding the specified value of heat resistance. Engagement force is reduced. It was obtained by various experiments that this distance is about 10 mm when using a normal material, but it is not limited to this, and various values may be taken depending on the structure of the material, the heating bag, etc. Can.

  The height of the bottom film folding portion of the bottom portion 105 of the heating bag 901 and the external dimension of the bag can be appropriately determined depending on the size of the content to be stored. However, since the external dimensions of the heating bag 901 are limited by the size of the storage unit of the microwave oven used and the diameter of the rotating tray, it is necessary to make the size fit the limitation. Since the placing tray of the household microwave oven is usually about 280 mm in diameter, the width of the bag is preferably 280 mm or less.

  Hereinafter, although the example which heats a foodstuff using a heating bag of this embodiment is explained, a heating bag of this embodiment is not restricted to these, heats a foodstuff with a microwave oven etc., keeps it warm, and cooks It can be used in various applications as a heating bag during the process.

Example 1
A present Example cooks ingredients using the heating bag of this embodiment. FIG. 12 is a diagram showing an example of a series of flows of the heating method of the heating bag of the present embodiment. As shown in FIG. 12, first, uncooked ingredients or semi-cooked food and water are put into the heating bag 101 of the present embodiment (step 1201). The zipper 102, which is a fastening part, is closed, and the heating bag 101 is placed in the microwave oven and heated (step 1202). The sealed water is heated by microwaves to become hot water, and the food of the contents is boiled or boiled (step 1203). Under the present circumstances, since a fastening part of this embodiment has high heat resistance and does not release an engaging part easily according to the position where the covering part was stuck, avoiding that a content jets out also from a large opening is possible. it can. In this way, the uncooked or semi-cooked food can be supplied with additional heat and moisture to complete the cooking.

  Thereafter, concentrated soup or powdery composition can be added to the soup with a boil, and it can be eaten as soup stock, left in the heating bag 101, or transferred to other dishes (step 1205). In addition, when seasoning is performed separately, the soup is discarded from the opening portion of the above-mentioned heating bag 101 with a chopstick (step 1206), and the cooking is completed.

(Example 2)
Hereinafter, the example which heat-cooks a frozen food is shown as another Example of the bag for a heating. FIG. 13 is a diagram showing an example of a series of flow of a heating method in the case of using the heating bag of the present embodiment as a packaging bag for frozen food.

  In general, the principle of heating by a microwave oven is, as is well known, to generate heat by vibrating the moisture in the food with microwaves by irradiating the microwaves, and basically it is in a liquid state It is not heated without it. For this reason, since it takes a long time to thaw a large ice block as it is as frozen food from the principle of heating of a microwave oven, the frozen food of this embodiment is a liquid portion because it is thawed in a short time. Is thawed more quickly by dividing the frozen ice mass into multiple ice pieces, and the thawed liquid portion is further heated to generate heat, and the heat causes the solid portion to thaw and cook. Specifically, as in normal cooking, necessary ingredients are added to the preparation, fixed cooking is performed, frozen (semi-cooked), frozen water and crushed granular ice crush or crushed ice At the same time, the frozen food of the present embodiment is manufactured by being enclosed in a heating bag.

  Next, the heating method of the present embodiment will be described with reference to FIG. 13. First, the above-described frozen food is sealed in the heating bag 101 of the present embodiment. The heating bag 101 is placed in the storage of the microwave oven with the zipper 102 as the fastening part closed, and heating is performed from the frozen storage state (step 1301). Before the ingredients are thawed, the crush-like ice is thawed quickly, and the thawed water is heated by microwaves to become hot water, and the contents of the food are boiled or boiled (step 1302). In this way, the uncooked or semi-cooked food can be supplied with additional heat and moisture to complete the cooking.

  Thereafter, depending on whether or not the soup is used with boiling water (Step 1303), the concentrated soup or powdery composition is added to the boiling soup and used as soup stock (Yes in Step 1303). It can be transferred to other dishes or eaten (step 1305).

  On the other hand, when seasoning is performed separately (No in step 1303), the soup is discarded from the closed portion of the heating bag 101 or a dedicated opening (not shown) to complete cooking (step 1304).

Second Embodiment
The present embodiment is basically the same as the above-described first embodiment, and differs in that a gas release mechanism is newly provided, but the other mechanisms are the same, so they will not be described in detail individually. In the first embodiment described above, high temperature water vapor is sufficiently separated from the engaging portion by setting the covering portion at a position sufficiently lower than the engaging portion, thereby avoiding the influence of heat. As described above, when the engaging portion is sufficiently strong even at high temperature, the pressure of the water vapor can not escape depending on the mode of use, and it is also conceivable that the contents are ejected from the careless place. The heating bag of the present embodiment is provided with a gas release mechanism that partially opens when the predetermined pressure is exceeded, in order to avoid such accidental discharge of high-temperature contents.

  FIG. 6 is a perspective view of the heating bag of the present embodiment, and FIG. 7 is a side view. FIG. 8 is a top view of the heating bag of the present embodiment. As in the first embodiment described above, the fastening portion 102 uses any structure known in the technical field, and comprises a pair of engaging members, each having a male and female shape or the like. The bag can be engaged to seal the bag, and when the bag is opened, the pair of engaging portions can be separated and opened by pulling with a predetermined force.

  As shown in FIG. 7, the front surface member 204 of the heating bag 101 of the present embodiment includes a gas release mechanism 602 formed between the left and right side edge portions 104. The gas release mechanism 602 may use any mechanism known in the art, for example, at a position closer to the retaining portion 102 than the central portion in the extending direction of the side edge portions 104, It can be provided over the entire width in the direction orthogonal to the extending direction of the side edge portions 104. As shown in FIG. 7, the gas release mechanism 602 is formed by folding a part of the front surface member 204 in a convoluted manner and cutting the folded portion. The gas release mechanism 602 is provided on the upper side portion side of the pair of flat portions overlapping each other, is opened at the tip formed by cutting the folded back portion, and is communicated with the inside of the bag at the lower side portions of the pair of flat portions.

  More specifically, the configuration of the gas release mechanism will be described. As shown in FIG. 7, the gas release mechanism 602 has a seal with a predetermined width inside. As shown in FIG. 8, the seal portion is a strip that can be peeled off when the heating bag 601 is heated in a sealed state, and a strip extending from the gas release seal to both left and right side edge portions 104. And a seal portion. The strip-shaped seal portion is formed to slope downward from the start point of the gas release seal portion in the central portion toward the left and right ends of the gas release mechanism 602. The gas release seal portion disposed near the center has a shape which is bent in a substantially V shape and protruded as shown in FIGS. 6 and 8, and is formed on the lower side than a line connecting the start points of the curved shape. It is done.

  Next, the operation at the time of heating with a microwave oven or the like will be described with reference to FIG. FIG. 9 is a view for explaining the operation at the time of heating of the heating bag of the present embodiment. In the heating bag 601, the water content of the contents is heated in the microwave oven to become high temperature, and when the internal pressure increases due to the generation of water vapor, the main body expands and the force is concentrated at the tip of the gas release mechanism 602 Will be added to As a result, in the gas release seal, the two flat portions separate from the tip end, and the water vapor from the separated gas release seal is discharged from the inside of the gas release mechanism 602 to the outside. As a result, the pressure of the water vapor does not exceed a certain level, so that it is possible to prevent the spouting of the contents inadvertently from other places when release by the heat of the engaging portion is avoided by the covering portion 203.

  On the other hand, as shown in FIG. 9, in the fastening portion 102, as in the first embodiment described above, when the pressure in the heating bag 101 rises, the covering portion 203 is attached by the pressure of water vapor. Is deformed in such a manner as to stick to the inner surface of the opposite heating bag, covering the vicinity of the engaging portion, but if the base point 206 is set sufficiently downward, the heat of water vapor does not reach the engaging portion You can do so. Here, even in the prior art, if the heating bag has the gas release mechanism, the pressure increase due to the water vapor during heating can be suppressed and the heat cooking can be performed, but the heating portion is exposed to high temperature water vapor during heating. Not only that, due to the pressure of water vapor, the stress acts horizontally in the upper part of the heating bag, and the engagement of the pair of engagement members of the catch may be disengaged and the catch may be opened and the contents may be ejected is there. In other words, zipper-like fasteners are designed to be held open by a human hand and are designed to be disengaged with a small tensile force, so it is easy when the inside of the bag is pressurized by heating. However, if they are engaged by a force sufficient to withstand the high pressure of heating, they can not be easily opened manually. The covering portion 203 of the present embodiment also disperses this stress, and can prevent accidental ejection of the contents even when the pressure of the water vapor is increased before the engaging portion is released due to high heat. In this embodiment, as shown in FIG. 9, the pressure acts in the direction indicated by the arrow 901 and does not act to separate the engaging member, so that the engagement is released even if the tensile force of the engagement is weak. The fastening portion 102 is released, and there is no risk of the contents spouting from the opening.

  In this embodiment, the base portion 206 on which the lower covering portion 203 of the female engaging member 201 is heat-sealed is apexed by sticking to the contact portion 902 on the side opposite to the heat-sealed covering portion 203. As the heating bag 101 expands. For this reason, the engaging portion is not exposed to heat such as water vapor and stress is not applied, and stress is applied to the covering portion 203 and the back member 205 with the base 206 at the top, so that high temperature is obtained at the time of heating. It is possible to reduce the possibility that the engaging portion is released and high temperature water vapor and contents are spouted out, or the internal pressure is reduced to a value below the value suitable for the heating plate. In addition, in order to realize more reliable gas release in the gas release mechanism 103, the opening strength of the retaining portion 102 with respect to the internal pressure is set sufficiently higher than the opening strength of the gas release mechanism 103.

DESCRIPTION OF SYMBOLS 101 Heating bag 102 Fastening part 104 Side edge part 105 Bottom part 201 Female engaging member 202 Male engaging member 203 Covering part 204 Front member 205 Back member 206 Base part 401 Ingredient 503 Contact part 601 Heating bag 602 Gas release mechanism 901 Arrow 902 Contact portion 1001 Heating bag 1002 Fastening portion 1005 Bottom portion 1101 Female engagement member 1102 Male engagement member

Claims (11)

A heating bag fastening structure,
A sealing means which can be opened and closed with a predetermined tensile force, which is disposed inside the upper opening of the heating bag;
Coating means disposed below the sealing means and covering the contents or gas so as not to directly contact the sealing means when heated, the coating means being disposed at a predetermined distance or more from the sealing means Fastener structure characterized by comprising and.   The fastening portion structure according to claim 1, wherein the sealing means is provided along the upper opening on the lower inner surface of the upper opening of the heating bag.   The fastening structure according to claim 2, wherein the sealing means includes a pair of engaging members, and a surface opposite to the engaging surface is attached to the inner surface of the heating bag.   The covering portion is attached to a lower portion of any one of the engaging members, and when an internal pressure is applied, the covering portion is in contact with the inner surface of the heating bag to which the other of the engaging members is attached. The clasp structure according to claim 3, characterized in that the contents or the internal gas is coated so as not to be in direct contact.   The fastening portion structure according to claim 4, wherein the covering portion is attached to the inner surface of the heating bag to a predetermined range below the one engaging member.   The covering portion is attached to a surface opposite to the engaging surface of any one lower portion of the engaging member, and in the non-heated state, the other of the engaging member is attached by elasticity. Fastener structure according to claim 4 or 5, characterized in that it approaches the inner surface. A bag-like main body formed of a sheet formed by laminating a plurality of layers including an inner surface layer;
Providing an opening means for partially opening the food or water enclosed and heating it to generate steam so that the internal pressure reaches a predetermined pressure so that the internal pressure does not rise above the predetermined pressure; A heating bag having the clasp structure according to any one of claims 1 to 6.   The heating bag according to claim 7, wherein the opening strength to the internal pressure at the time of heating of the sealing means is sufficiently higher than the opening strength of the opening means.   The heating bag according to claim 7 or 8, wherein the opening means includes a flap in which the sheet is formed in a palm shape.   10. The heating bag according to claim 9, wherein the flap portion includes a V-shaped water vapor discharger that releases water vapor at the predetermined pressure.   The heating bag according to claim 7 or 8, wherein the opening means includes a water vapor discharge hole by an easily peelable fusion-bonded portion.

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