JP2008035919A - Exothermic implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly versatile exothermic implement with a large calorific value relative to the quantity of an exothermic agent and the quantity of water to be used. <P>SOLUTION: The exothermic implement is composed of the exothermic agent which generates heat by the contact with water; a self-supportive frame body which is disposed on the exothermic agent and which has an opening at the center; a laminated body which is mounted on the frame body in such a state as fixed to one side of the frame body and which is composed of a water bag with water enclosed in a tearable and humidity-impermeable bag body; a long opener, one end of which is fixed to a side opposite from the side of the self-supportive frame body of the laminated body, the other end of which extends upward between the frame body and the water bag from the above-mentioned side of the frame body and which extends along the upper surface of the water bag over the side of the frame body fixed to the one end; and a tearable and humidity-impermeable outer bag in which the laminated body and the long opener are enclosed in such a state that the other end of the opener is drawn out. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heating tool that can be advantageously used to heat a food by placing it under a food tray that contains food such as a lunch box or a side dish.

  Conventionally, a heating tool using a heat generating agent (eg, quicklime powder) that generates heat by contact with water has been placed under the food tray for storing food such as lunch boxes or side dishes, and stored in the food tray. It is known to heat food to a suitable temperature before meals. It is also known to heat drinks such as sake using such a heating tool.

  Patent Document 1 discloses a container main body having an open top surface, a heating tool (heating member) accommodated in the bottom of the container main body, a food tray (food container) disposed on the heating tool, and a container main body. A heating container composed of a lid or the like is disclosed.

  FIG. 6 is an exploded perspective view showing the configuration of the heating tool described in the document. The heating tool 60 of FIG. 6 includes a heating agent bag 61 in which a heating agent is sealed, a water bag 62 in which water is sealed, and one end 63 a of a string 63 used for breaking the heating agent bag 61 and the water bag 62. It consists of a fixed plate 64. Each of the heat generating agent bag 61 and the water bag 62 is formed of a film made of synthetic resin such as polyethylene, for example.

  When the string 63 of the heating tool 60 is pulled in the direction indicated by the arrow shown in FIG. 6, the heating agent bag 61 and the water bag 62 are torn, and the heating agent and water flowing out from each bag come into contact and react. Steam is generated by the heat generated. And the foodstuff accommodated in the food tray arrange | positioned on the heating tool 60 with this water vapor | steam is heated. The heating tool 60 is configured so that water flowing out of the water bag 62 does not leak outside from the bottom of the container body (see FIG. 3 of the same document). Used on top of.

  FIG. 7 is an exploded perspective view showing the configuration of the heating tool described in Patent Document 2. As shown in FIG. 7 includes a case 75 having an opening on the upper surface, a granular heat generating agent 71 accommodated in the case 75, a water bag 72 disposed on the heat generating agent 71, a heat generating agent 71 and a water bag. 72 in order to suppress contact between the support material 74, one end 73a of the string 73 for breaking the water bag, and the heat generating agent 71 and moisture in the air. It is composed of a moisture-proof sheet 76 attached to the periphery of the upper end, and a water vapor permeable sheet 77 attached on the moisture-proof sheet.

  When the string 73 of the heating tool 70 is pulled in the direction indicated by the arrow in FIG. 7, the moisture-proof sheet 76 and the water bag 72 are torn and water flows out of the water bag 72, and the water and the heating agent come into contact with each other. Water vapor is generated by reaction. The steam flows out of the case 75 through the opening of the moisture-proof sheet 76 torn by the string 73 and the steam-permeable sheet 77, and is used for heating the food.

  FIG. 8 is a perspective view showing a configuration of a heating tool described in Patent Document 3. As shown in FIG. The heating tool 80 of FIG. 8 has a configuration in which a heat generating member 81 and a water bag 82 having a configuration in which a heat generating agent is stored in a water-permeable bag body are enclosed in a storage bag 85. The water bag 82 of the heating tool 80 is provided with a tape piece 83 formed by making a cut 82b in the seal portion 82a.

When the tape piece 83 of the heating tool 80 is pulled in the direction indicated by the arrow shown in FIG. 8, the storage bag 85 and the water bag 82 are torn and water flows out of the water bag 82 and is stored in the water and the heating member. Water vapor is generated by contact and reaction with the exothermic agent. The water vapor flows out from the side opening of the storage bag 85 torn by the tape piece 83 and is used for heating the food.
Japanese Patent Laid-Open No. 11-292155 JP 2002-360439 A Japanese Utility Model Publication No. 5-68434

  The heating tool is sold in combination with, for example, lunch boxes of various sizes (contained from a container body, a food tray and a lid), so that the size can be changed flexibly according to this. It is desirable that Moreover, it is desirable that the heating tool has a large calorific value with respect to the amount of heat generating agent and water used.

  The heating tool of Patent Document 1 requires a tray corresponding to the size of the heating tool when used. Usually, a resin molded product is used as such a tray. Because the mold used to mold such a saucer is expensive (about several million yen per die), a saucer is made for each heating tool of various sizes (corresponding to lunch boxes of various sizes). To do is not realistic. For this reason, it is difficult for such a heating tool to change flexibly the size of the saucer used at the time of use, ie, the size of the heating tool, according to the lunch box of various sizes, and is low in versatility.

  Further, in this heating tool, a plate to which one end of a string used for breaking the both is fixed is disposed below the heat generating agent bag and the water bag. For this reason, after flowing out of the water bag, the water flowing into the gap between the water bag and the heat generating agent bag, the gap between the heat generating agent bag and the plate, or around the plate or the back side (the gap between the plate and the tray) Inability to contact the exothermic agent. Therefore, since this heating tool needs to put a large amount of water in advance in a water bag in order to obtain a sufficiently large calorific value, the calorific value with respect to the amount of exothermic agent and water to be used is small.

  The heating tool of Patent Document 2 requires a case that encloses a heating agent and a water bag. Usually, since a resin molded product is used for such a case, such a heating tool is also low in versatility for the same reason as in the case of the heating tool provided with the above-described tray.

  Further, after the heating tool flows out of the water bag, the water that flows into the gap between the opened water bag and the support member cannot contact the heat generating agent. Accordingly, this heating tool also requires a large amount of water in advance in order to obtain a sufficiently large calorific value, so that the calorific value with respect to the amount of the exothermic agent and water used is small.

  In the heating tool of Patent Document 3, a storage bag is used for hermetically storing a heat generating agent bag and a water bag. From the side end opening of the storage bag, which is torn by a piece of tape during use, to the outside of the storage bag. Since water flows out, it is necessary to arrange and use the heating tool on the tray as in the case of the heating tool of Patent Document 1 described above, and its versatility is still not sufficient.

  In addition, the heat generating tool is configured such that the water that flows out of the storage bag as described above, and the water that flows into the gap between the opened water bag and the storage bag after flowing out of the water bag comes into contact with the heating agent. Can not do it. Therefore, this heat generating tool also has a small heat generation amount with respect to the amount of heat generating agent and water used.

  The subject of this invention is providing the heat generating tool which is excellent in versatility and has a large calorific value with respect to the quantity of the heat generating agent and water to be used.

  As a result of repeated research on the above-described problems, the present inventor has obtained a heat-generating agent, a self-supporting frame having an opening at the center, and a water bag with one end of the elongated opening device being fixed. The case as described above is devised by arranging the heating tool so that the water bag and the upper surface of the outer bag are torn by the elongate opening tool in use when stacked in this order and sealed in the outer bag. And a heating tool that can generate a large amount of heat with respect to the heat generating agent and the amount of water to be used because most of the water that has flowed out of the water bag in contact with the heat generating agent is not required. And reached the present invention.

  Accordingly, the present invention provides a heat generating agent that generates heat upon contact with water, a self-supporting frame that is disposed on the heat generating agent and that has an opening in the center, and is fixed to one side of the frame. A laminated body comprising a water bag in which water is sealed in an easily tearable and moisture-impermeable bag body, which is placed on the frame body, and faces the above-mentioned side of the self-supporting frame body of this laminated body One end is fixed to the side, the other end passes between the frame and the water bag, extends upward from the position of the former side of the frame, and extends along the top surface of the water bag. Enclose the elongate opener extending beyond the side of the frame with the end fixed, and the laminate and elongate opener with the other end of the opener pulled out It is a heating tool comprising an easily tearable and non-breathable outer bag.

Preferred embodiments of the heating tool of the present invention are as follows.
(1) The exothermic agent is accommodated in the water-permeable bag.
(2) The self-supporting frame has a skirt provided along the opening for guiding the direction of water movement.
(3) The self-supporting frame is made of cardboard or cardboard.
(4) Each of the outer bag and the bag body is made of a resin film on which a metal layer is laminated.

  The present invention also covers a box having an opening at the top and a hole on the side wall, a heating tool housed in the bottom of the box, a food tray disposed on the heating tool, and a box opening. A container for heating food comprising a lid, wherein the heating tool of the present invention is used as the heating tool, and the other end of the elongated opening tool is externally passed through a hole in the box. There is also a food heating container characterized by being drawn out.

Preferred embodiments of the food heating container of the present invention are as follows.
(1) The heating tool is fixed to the box at a part of the outer surface of the outer bag.
(2) The heating tool has a leg portion extending downward from a side to which the water bag of the self-supporting frame is fixed, and an extension portion extending in parallel to the frame body from the lower side of the leg portion. The outer surface of the outer bag corresponding to the lower surface of the extension is bonded and fixed to the box.

  In the heating tool of the present invention, the water bag and the upper surface of the outer bag are torn by the elongated opening tool during use, so that the water flowing out of the water bag is held inside the outer bag and flows out to the outside. There is no. Accordingly, the heating tool of the present invention does not require a case for containing a heat generating agent or a water bag, or a tray for water flowing out of the water bag during use. It is.

  The opening provided in the self-supporting frame of the heating tool of the present invention prevents the outflow of water that has flowed out of the water bag during use to the outside of the outer bag and allows most of the water to pass therethrough. It works to guide and contact the heating agent on the side. That is, in the heating tool of the present invention, the water flowing out of the water bag is, for example, a gap between the water bag and the heating agent bag, a gap between the heating agent bag and the plate, as in the heating tool of Patent Document 1 above, Or it does not flow into the circumference | surroundings or back side (gap between a plate and a storage bag), and most passes through the opening part of a frame, and contacts a heat generating agent. For this reason, the heating tool of the present invention exhibits a large amount of heat generation with respect to the amount of heat generating agent and water used.

  The heating tool of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view showing a configuration example of the heating tool of the present invention, and FIG. 2 is a cross-sectional view of the heating tool 10 cut along the cutting line II-II written in FIG. 3 is a perspective view showing a state before the laminated body 17 of the heating tool 10 shown in FIG. 2 is accommodated in the outer bag 19, and FIG. 4 is an exploded perspective view of the laminated body 17 shown in FIG. is there.

  As shown in FIG. 1 to FIG. 4, a heating tool 10 of the present invention has a heating agent 11 that generates heat by contact with water, a self-supporting property that is disposed on the heating agent 11 and that has an opening 12 in the center. A water bag 16 in which water 15 is sealed in an easily tearable and moisture-impermeable bag body 14 placed on the frame body 13 in a state of being fixed to the frame body 13 and one side 13a of the frame body 13. One end 18b is fixed to the side 13b of the laminated body 17 and the self-supporting frame 13 of the laminated body 17 facing the side 13a, and the other end 18a is connected to the frame 13 and the water bag 16. And extends upward from the position of the former side 13a of the frame 13 and extends along the upper surface of the water bag 16 beyond the side 13b of the frame 13 to which the one end 18b is fixed. The long opening device 18 and the laminate 17 and the long opening device 18 are placed on the opening device 18. And a like easy tearable and moisture impermeable outer bag 19 is sealed in a state of pulling out the other end 18a to the outside.

  When the elongate opening device 18 of the heating device 10 is pulled in the direction indicated by the arrow in FIG. 2, the water bag 16 and the upper surface of the outer bag 19 are torn, and the water flowing out of the water bag 16 is self-supporting. Water vapor is generated by the heat generated by the reaction between the two through the opening 12 of the frame 13 and in contact with the heat generating agent 11. The water vapor generated in this manner flows out through the opening of the frame 13 and the upper surface opening of the outer bag 19 torn by the opening tool, and is stored in the food tray disposed on the heating tool 10. It is used for heating of processed food.

  In the heating tool 10, the water bag 16 and the upper surface of the outer bag 19 are torn apart by the long opening device 18 during use, so that the water flowing out of the water bag 16 is held inside the outer bag 19 and externally. Never flow out. Therefore, since the heating tool 10 does not require a case for containing the heat generating agent or the water bag, or a tray for the water flowing out of the water bag during use, the heat generating tool 10 is excellent in versatility that can be flexibly changed in size. . For example, even for a lunch box with a small production volume, it is not necessary to produce a case or a tray by resin molding using a mold, so that a heating tool of a size corresponding to this can be provided at a low price.

  As the exothermic agent 11, a known exothermic agent that generates heat upon contact with water, for example, quicklime powder, or a mixture of quicklime powder and aluminum powder can be used. Further, as the heat generating agent, a powdered heat generating agent bound with a resin binder (for example, in a sheet shape or granular shape) may be used.

  The exothermic agent which consists of a mixture of the said quicklime powder and aluminum powder is described in detail by Unexamined-Japanese-Patent No. 2001-226668, for example. In order to obtain a larger calorific value, it is also preferable to add sodium chloride or the like to the heat generating agent (or water sealed in a water bag). About the exothermic agent which added sodium chloride etc., it describes in detail in Unexamined-Japanese-Patent No. 2006-152090, for example.

  As shown in FIG. 2, it is preferable that the heat generating agent 11 is accommodated in a water-permeable bag 21 formed of, for example, a nonwoven fabric or Japanese paper. The “water permeability” of the bag body means that the powdery heat generating agent to be used does not permeate a large amount to the outside of the bag body and has a water permeability that allows water to permeate inside. I mean.

  When the heat generating agent 11 is accommodated in the water permeable bag body 21, the water that has flowed out of the water bag 16 and then passed through the opening 12 of the frame body 13 first becomes the heat generating agent accommodated on the upper side of the bag body 21. The heat generating agent that contacts the heat generating agent accommodated on the side of the side of the bag while traveling along the outer surface of the bag 21 and then flows down to the bottom of the outer bag 19 and is accommodated below the bag 21 To touch. That is, immediately after the use of the heating tool 10 is started, water can be efficiently brought into contact with the heating agent 11 accommodated in the water-permeable bag 21 to obtain a large calorific value, so that the food is heated in a short time. Can do.

  A self-supporting frame 13 having an opening 12 at the center is disposed on the heat generating agent 11. If the opening 12 is not provided in the frame 13, the water bag is used when the upper surface of the water bag 16 and the outer bag 19 is torn by the long opening device 18 when the heating tool is used. Since the water flowing out from 16 is difficult to flow downward, a part thereof flows out from the upper surface opening of the outer bag 19 torn by the opening tool 18. When the opening 12 is provided in the frame 13, when the water bag 16 is torn by the opening tool 18, the water flowing out of the water bag 16 immediately passes through the opening 12 of the frame 13 and the frame 13. Therefore, it is possible to prevent water from flowing out of the outer bag 19 as described above.

  Further, the opening 12 of the self-supporting frame 13 functions to allow most of the water flowing out of the water bag 16 to pass therethrough and to guide and contact the heat generating agent 11 below. That is, in the heating tool 10, the water flowing out of the water bag 16 is, for example, the gap between the water bag and the heating agent bag, the gap between the heating agent bag and the plate, or the plate as in the heating tool of Patent Document 1 described above. Most of the gas passes through the opening 12 and comes into contact with the heating agent 11 without flowing into the periphery or the back side (the gap between the plate and the storage bag). That is, since there is no gap that causes the water that does not come into contact with the heat generating agent 11 included in the conventional heat generating devices described in each of the above-mentioned patent documents, the heat generating device 10 includes the heat generating agent and water used. The calorific value is large relative to the amount.

  The opening 12 of the self-supporting frame 13 also has a function of allowing most of the water vapor generated by the contact between the heat generating agent and water to pass through and efficiently flowing out from the upper surface opening of the outer bag 19 just above it. To do. If the opening 12 is not provided in the frame 13, the water vapor generated by the contact between the heat generating agent and water passes through the gap between the outer peripheral edge and the outer bag 19 from the lower side of the frame 13. At this time, since the water vapor is cooled and a part thereof returns to the water, the amount of the vapor flowing out from the upper surface opening of the outer bag 19 is reduced.

  The self-supporting frame 13 preferably has skirt portions 23 a and 23 b provided along the opening 12 for guiding the moving direction of water. By providing such skirt portions 23a and 23b, the water flowing out of the water bag 16 moves along the surface of each skirt portion and is guided above the heat generating agent 11, and this water is also generated as the heat generating agent. Most of the water vapor generated by contact with the outer bag 19 can pass through the opening 12 of the frame 13 and flow out from the upper surface opening of the outer bag 19 (the gap between the outer peripheral edge of the frame 13 and the outer bag 19). The amount of water vapor that passes through can be reduced), so that the food can be heated in a shorter time.

  Further, when the heat generating agent 11 is accommodated in the water-permeable bag 21 as described above, if the bag 21 and the skirt portions 23a and 23b are fixed with the adhesive tape 24 as shown in FIG. 11 can be prevented from moving inside the outer bag 19, and even if the volume of the heat generating agent 11 expands due to reaction with water, each skirt portion is a frame body. Since the adhesive tape 24 is not peeled off from the skirt portions 23a and 23b, the bag body 21 in which the heat generating agent 11 is accommodated can be used as the opening portion of the frame body 13 because the adhesive tape 24 is not peeled off from the skirt portions 23a and 23b. 12 can be stably placed on the lower side.

  The self-supporting frame 13 is made of, for example, a resin material typified by polyethylene resin or polypropylene resin, or cardboard or cardboard. The self-supporting frame 13 is preferably made of cardboard or cardboard. As a result, the frame 13 can be easily assembled from a single cardboard sheet together with the skirt portions 23a and 23b and the leg portions 35 and the extension portions 36, which will be described later, and the heating tool can be easily discarded. become.

  And in the heat generating tool 10 of this invention, since most of the water which flowed out from the water bag 16 passes the opening part 12 of the frame 13, water hardly contacts the frame 13. For this reason, even when the frame 13 is made of cardboard or cardboard, the frame 13 hardly absorbs water (however, water vapor generated by the heating tool is gradually absorbed). The calorific value with respect to the amount of is not significantly reduced.

  The “self-supporting” of the frame means that when the heating device is used and the elongate opening device is pulled and force is applied to the frame, the frame is bent or greatly curved. It means having a strength that can keep its own shape to the extent that it does not. Whether or not it has such strength can be easily confirmed by connecting and pulling the opening tool to the frame and applying force to the frame. When a cardboard frame is used, the length direction of the flute of the cardboard may coincide with the direction of pulling the long opening device so that the frame exhibits high strength (the self-supporting property). preferable.

  The strength of the self-supporting frame 13 can be easily adjusted by the material of the frame, the thickness, or the size of the opening. For example, a cardboard frame as described above exhibits sufficient self-supporting if it has a thickness of about 1 mm (when the length direction of the flute is matched with the direction of pulling the elongated opening device). .

  On the self-supporting frame 13, an easily tearable and moisture-impermeable water bag 16 is placed in a state of being fixed to one side 13 a of the frame 13.

  When the moisture permeability of the film forming the water bag 16 is high, the water enclosed in the water bag 16 permeates to the outside as water vapor during the period from the production of the heating tool to its use, Since it contacts the heat generating agent 11 inside the outer bag 19, a sufficient amount of heat generated may not be obtained when the heating tool is used.

  The “non-breathability” of the water bag means that even if the water in the water bag is permeated to the outside as water vapor during the period from the production of the heating tool to the use, It means that the water bag is formed from a film having a low moisture permeability so that a practical calorific value can be obtained. For example, heating tools used for heating station lunches and catered lunches are used relatively quickly after production, but a large number of heating tools used for heating lunch boxes supplied to victims in the event of a disaster are prepared in advance in preparation for disasters. Therefore, it is often stored for a long time before use. Therefore, it is necessary to form the water bag of the heating tool used at the time of the above disaster from a film having a lower moisture permeability as compared with a heating tool for station lunches or catered lunches.

As the film for forming the water bag 16, a film having a water vapor transmission rate of 10 g / (m ² · 24 hours) or less is usually used. The water vapor transmission rate is 0.01 to 5.0 g, and further 0.01 to It is preferable to be in the range of 1.5, particularly 0.01 to 0.50 g / (m ² · 24 hours). As described above, in the case of a heating tool stored for a long period of time (for example, heat generation used in the above disaster), the moisture permeability of the film forming the water bag is 0.01 to 1.5, particularly 0.01 to 1.5. It is preferably in the range of 0.50 g / (m ² · 24 hours). The moisture permeability means a value measured according to a Japanese Industrial Standard measurement method (JIS K 7129 (B)) under conditions of a temperature of 40 ° C. and a humidity of 90% RH.

  Examples of the film forming the water bag 16 include a polyethylene resin film, a polypropylene resin film, a polystyrene resin film, a polyamide resin film, a polyester resin film, a resin film such as a polycarbonate resin film or a polyvinyl chloride resin film, and a metal such as aluminum. It is formed from a resin film in which layers are laminated (hereinafter referred to as a resin film with a metal layer) or a laminated film in which two or more of these films are laminated. The moisture permeability of such a film can be easily adjusted by, for example, the material and thickness of the resin film or metal layer, or the layer configuration of the film.

The water bag 16 is preferably formed from a resin film with a metal layer. This is because, since the metal layer hardly transmits water vapor, the water bag 16 can be formed from a thin film that has low moisture permeability and is easy to tear with an opening tool. As a film forming the water bag 16 (and the easily tearable and non-moisture permeable outer bag 19 described later) of the heating tool 10 shown in FIGS. 1 and 2, an aluminum-deposited polyester film (resin with a metal layer) having a thickness of 12 μm is used. A commercially available laminated film (moisture permeability: 0.2 g / (m ² · 24 hours)) obtained by laminating a polypropylene film having a thickness of 60 μm is used on the vapor deposition surface of the film.

  Also, the “easy tearability” of the water bag means that when the user pulls the elongated opening device by hand when using the heating tool, the water bag can be torn by the force applied to the water bag. For example, as shown in FIGS. 2 to 4, it is possible to tear the water bag 16 in a state in which the water bag 16 is provided with a notch 16 a that assists the tearing by the opening tool 18. And in order to make tearing of a water bag easy, it is preferable that the resin film which forms said water bag is what was uniaxially stretched.

  As shown in FIGS. 2 to 4, the water bag 16 of the heating tool 10 is fixed to one side 13 a of the frame 13 by, for example, a staple needle 25. Moreover, if the elongate opening tool 18 is passed through the notch 16a that assists the tearing of the water bag 16, and the vicinity of the end of the notch 16a is fixed by the binding needle 25, the opening tool 18 comes off from the notch 16a. Therefore, the water bag 16 can be reliably torn. There is no restriction | limiting in particular in the fixing method of the water bag 16 and the frame 13, For example, you may fix both mutually using an adhesive tape (or adhesive agent).

  And one end part 18b of the elongate opening tool 18 used for tearing the water bag 16 of the heating tool 10 and the upper surface of the outer bag 19 is on the side 13a to which the water bag 16 of the frame 13 is fixed. Fixed to the opposite side 13b, the other end 18a passes between the frame body 13 and the water bag 16, extends upward from the position of the side 13a of the frame body 13, along the upper surface of the water bag 16, The one end 18b extends beyond the side 13b of the frame 13 to which the one end 18b is fixed.

  As the long opening tool 18, a long string or tape is used. When a long and wide tape (for example, 2 to 3 cm) is used as the opening device 18, the upper surface of the outer bag 19 is largely torn by the tape, so that a larger amount of steam is generated from the upper surface opening of the outer bag 19. Can be drained. The long tape is preferably formed from, for example, a resin film or synthetic paper.

  There is no particular limitation on the fixing method between the end 18b of the long opening device 18 and the frame 13, and for example, as shown in FIGS. 2 and 4, a cut 28 is provided on the side 13b of the frame 13, and the cut 28 The knot of the opening tool 18 may be hooked and fixed, or may be fixed using an adhesive tape, a staple needle of a stapler, or the like.

  And the laminated body 17 comprised from said heat generating agent 11, the frame 13, and the water bag 16 and the elongate opening tool 18 are easy in the state which pulled out the other edge part 18a of the opening tool 18 outside. It is enclosed in a tearable and moisture-impermeable outer bag 19.

  The “easy tearability” of the outer bag means that it can be torn by an opening tool as in the case of a water bag, and “non-moisture permeable” means that it is practically used by a heating tool at the time of use. It means that the outer bag is formed from a film having a low moisture permeability so as to obtain a calorific value. The example of the film used for formation of an outer bag is the same as that of the water bag.

  As shown in FIGS. 2 and 3, the outer bag 19 is formed with a notch 19 a for pulling out the end portion 18 a of the long opening device 18 to the outside. After the laminated body 17 is accommodated in the outer bag 19 in a state in which the end 18a of the opening tool 18 is pulled out through the notch 19a, the opening of the outer bag 19 is closed by, for example, heat sealing, and the notch 19a Adhesive tape 26 (preferably having a metal layer and showing low moisture permeability) is attached to the tape, and the drawer part of the opening device 18 is bonded to a known resin (eg, acrylic resin or epoxy resin type having low moisture permeability). The laminated body 17 can be enclosed in the outer bag 19 by closing with the agent 27. As the outer bag 19, instead of the cut 19a, a bag in which a hole for pulling out the end 18a of the long opening device 18 is formed may be used.

  As shown in FIG. 2, the self-supporting frame 13 of the heating tool 10 includes a leg 35 extending downward from the side 13 a to which the water bag 16 is fixed, and a frame from the lower side of the leg 35. 13 and an extension 36 extending in parallel with each other. As will be described later, the use of the extension 36 makes it easy to adhere and fix the heating tool 10 to, for example, the bottom of the lunch box, thereby generating heat when the elongate opening tool 18 is pulled. Movement of the tool 10 inside the lunch box is prevented. For this reason, it becomes possible to open the water bag 16 and the upper surface of the outer bag 19 more reliably using the long opening tool 18.

  FIG. 5 is a cross-sectional view showing a configuration example of the food heating container of the present invention. The food heating container 30 in FIG. 5 has a box 32 having an upper surface open and a hole 31 in the side wall, a heating tool 10 housed in the bottom of the box 32, and food disposed on the heating tool 10. It is a container for heating food composed of a tray 33 and a lid 34 that closes the opening of the box 32, and the heating tool of the present invention shown in FIGS. The other end 18a of the open-shaped opening 18 is characterized by being pulled out through the hole 31 of the box 32.

  By pulling the end portion 18a side of the elongated opening device 18 of the heating tool 10 included in the food heating container 30 in the direction indicated by the arrow 51 in the drawing, the water bag of the heating tool 10 and The upper surface of the outer bag 19 is torn, and steam flows out from the upper surface opening of the outer bag 19. The steam passes through a hole 33a provided at the peripheral edge of the food tray 33 as shown by an arrow 52 in the drawing, and for example, heats the rice 38 placed in the food tray, and then the lid 34. It flows out through the hole 34a provided in the outer side. Since the materials and configurations of the box body 32, the food tray 33, and the lid body 34 of the food heating container 30 are the same as those used in a heating container having a conventional heating tool, detailed description thereof is omitted. To do.

  And when the elongate opening tool 18 of the heating tool 10 of the present invention provided in the food heating container 30 is pulled as described above, the end side (right side in FIG. 5) of the frame body is the box body 32. Since the position of the self-supporting frame that supports and fixes the water bag is fixed, the water bag and the upper surface of the outer bag are reliably torn.

  The heating tool 10 is preferably fixed to the box 32 at a part of the outer surface of the outer bag 19. When the heating tool 10 and the box body 32 are fixed to each other, the heating tool 10 cannot move inside the box body 32, so that the opening bag 18 can tear the water bag and the upper surface of the outer bag more reliably. become able to.

  Furthermore, when the frame 13 of the heating tool 10 is provided with the leg portion 35 and the extension portion 36 as shown in FIG. 2 as described above, for example, as shown in FIG. (Or adhesive) is attached to the outer surface of the outer bag 19 corresponding to the extension of the heating tool 10, and then the heating tool is accommodated in the bottom of the box 32, and a force is applied to the position above the extension to apply the box. By pressing against the bottom, the heating tool 10 and the box 32 can be securely and easily bonded and fixed.

  As described above, since the heating tool of the present invention is excellent in versatility that can be flexibly changed in size according to various sizes of lunch boxes, for example, lunch boxes that are produced in small quantities (for example, seasonal lunch boxes) ), A heating tool of a size corresponding to this can be provided at a low price. In addition, since the heat generating tool of the present invention has a large heat generation amount with respect to the amount of heat generating agent and water used, the size (particularly the thickness) can be reduced. For this reason, the heating tool of the present invention is sold in containers of various sizes, and generally, side dishes for which a low-height container is preferably used also generate heat having a size corresponding to this (particularly a small thickness). Tools can be provided at a low price. In this way, by using the heating tool of the present invention, it is possible to provide the consumer with a seasonally-limited lunch box or side dish that was not suitable for the use of the heating tool in the warm state by heating before meals. become.

It is a perspective view which shows the structural example of the heat generating tool of this invention. It is sectional drawing of the heating tool 10 cut | disconnected along the cutting line II-II line entered in FIG. FIG. 3 is a perspective view showing a state before the laminated body 17 of the heating tool 10 shown in FIG. 2 is housed in an outer bag 19. It is a disassembled perspective view of the laminated body 17 shown in FIG. It is sectional drawing which shows the structural example of the food heating container of this invention. It is a disassembled perspective view which shows the structural example of the conventional heat generating tool. It is a disassembled perspective view which shows another structural example of the conventional heat generating tool. It is a perspective view which shows another structural example of the conventional heat generating tool.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Heating tool 11 Heating agent 12 Opening part 13 Self-supporting frame body 13a, 13b Frame side 14 Bag body 15 Water 16 Water bag 16a Notch 17 Laminated body 18 Long-shaped opening tool 18a, 18b End portion 19 Outer bag 19a Incision 21 Bag body 22 Heat generating agent bag 23a, 23b Skirt portion 24 Adhesive tape 25 Binding needle 26 Adhesive tape 27 Low moisture-permeable resin 28 Incision 30 Food heating container 31 Hole portion 32 Box body 33 Food tray 33a Hole Part 34 Lid 34a Hole 35 Leg 36 Extension 37 Double sided adhesive tape 38 Rice 51, 52 Arrow 60 Heating tool 61 Heating agent bag 62 Water bag 63 String 63a End of string 64 Plate 70 Heating tool 71 Granular heating agent 72 Water bag 73 String 73a String end 74 Support material 75 Case 76 Moisture-proof sheet 77 Water vapor permeable sheet 8 Cut heating tool 81 generating member 82 water bag 82a seal portion 82b 83 tape strips 85 containing bag

Claims (8)

  A heat generating agent that generates heat upon contact with water, a self-supporting frame that is disposed on the heat generating agent and that has an opening in the center, and is fixed to one side of the frame. A laminated body comprising a water bag in which water is sealed in an easily tearable and moisture-impermeable bag body, which is placed on one side of the self-supporting frame body of the laminated body facing the above-mentioned side. The end is fixed, the other end passes between the frame and the water bag, extends upward from the position of the former side of the frame, and the one end extends along the upper surface of the water bag. Easy to enclose the long opening device extending beyond the side of the fixed frame body, and the laminated body and the long opening device with the other end of the opening device pulled out. A heating tool consisting of a tearable and non-breathable outer bag.   The heating tool according to claim 1, wherein the heating agent is accommodated in the water-permeable bag.   The heating tool according to claim 1 or 2, wherein the self-supporting frame has a skirt provided along the opening for guiding the direction of water movement.   The heating tool according to any one of claims 1 to 3, wherein the self-supporting frame is made of cardboard or cardboard.   The heating tool according to any one of claims 1 to 4, wherein each of the outer bag and the bag body is made of a resin film in which a metal layer is laminated.   A box having an upper surface opened and having a hole in a side wall, a heating tool housed in the bottom of the box, a food tray disposed on the heating tool, and a lid for closing the opening of the box A container for heating food comprising the heating tool according to any one of claims 1 to 5, wherein the other end of the elongated opening tool is a box. A food heating container, wherein the food heating container is drawn to the outside through a hole in the food.   The food heating container according to claim 6, wherein the heating tool is fixed to the box at a part of the outer surface of the outer bag.   The heating tool has a leg portion extending downward from the side to which the water bag of the self-supporting frame is fixed, and an extension portion extending in parallel with the frame body from the lower side of the leg portion, and a lower surface of the extension portion The food heating container according to claim 6, which is adhered and fixed to the box on the outer surface of the outer bag corresponding to.

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