JP2007259966A - Lunch box equipped with heating implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lunch box equipped with a heating implement, which is capable of surely heating lunch. <P>SOLUTION: The lunch box equipped with the heating implement comprises: a box body opened on an upper surface and provided with a hole part which makes it possible to pull out a long-length opener on the front side; the heating implement housed at the bottom part of the box body; a food tray arranged on the heating implement; and a lid body for closing the opening of the box body. The heating implement includes: a watertight container in which a heating agent which generates heat by contact with water is enclosed and whose upper surface is formed of an easy-to-tear water impermeable film; a water bag composed by housing water in an easy-to-tear bag body joined and fixed on the water impermeable film; and a long-length opener which is arranged between the water impermeable film of the watertight container and the water bag in the state of being joined to the surface of the water impermeable film and whose one end is fixed to the front side of the box body, the watertight container or the water bag and whose other end is bent on the rear side of the water bag, inserted into the hole part on the front side of the box body and projects to the outside of the box body. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a lunch box provided with a heating tool.

  2. Description of the Related Art Conventionally, a lunch box having a heating tool for heating a lunch (eg, a station lunch) before eating is known. Such a lunch box has a box with an open top, a heating tool housed at the bottom of the box, a food tray placed on the heating tool, and a lid that closes the opening of the box. It consists of the body.

  Usually, as the heating tool of the lunch box, a water-impermeable heating agent bag (watertight container) in which a heating agent (eg, quicklime) that generates heat upon contact with water is enclosed, A heating bag having a structure provided with a string (elongate opening tool) that is disposed so as to overlap with water bags filled with water and is used to cut these bags is used. This heating tool is housed in the bottom of the box of the lunch box, and one end side of the string used for tearing the heating agent bag and the water bag is opened from the hole formed in the box. Drawn outside.

  When the user (the person who eats the lunch box) pulls the string drawn out of the lunch box before eating, both the heat-generating agent bag and the water bag are cut inside the lunch box by the string, and the heat is generated. The lunch box is heated by heat or steam generated by the contact and reaction of the agent and water. A lunch box provided with a heating tool having such a configuration is described in Patent Document 1, for example.

  On the other hand, in Patent Document 2, the above-mentioned heating tool has a high resistance when the heat-generating agent bag containing a solid heat-generating agent such as quicklime is torn with a string when both the heat-generating agent bag and the water bag are torn. Describes that the user may stop pulling the string before the heat-generating agent bag (and the water bag) is sufficiently torn and the box lunch may not be heated sufficiently.

  In order to solve such problems, in the same document, a moisture-proof sheet and a water vapor permeable sheet are pasted on the opening of a case containing a heat generating agent (not enclosed in a water-tight bag) and a water bag. A heating tool (heating unit) having the above structure has been proposed.

In the heating tool, the water bag (and the moisture-proof sheet) is torn by pulling the string drawn to the outside through the hole formed in the moisture-proof sheet, whereby the heating agent and water contained in the case are separated. React. And since the heating tool with such a configuration does not need to cut the heating agent bag, the resistance when pulling the string is small, so that the water bag is surely cut by the user and the lunch box is heated reliably. It is supposed to be possible.
JP-A-11-292155 JP 2002-360439 A

  By using the heating tool of Patent Document 2, the user can reliably heat the lunch by pulling the string drawn out of the lunch box. However, this heating tool has a pinhole in the water bag accommodated in the case, or when the water bag leaks due to a force applied to the string when it is assembled into the lunch box. There is a problem that it is difficult to find a water leak in the water bag from the outside of the case.

  Moreover, in the heating tool of the same literature, the string which tears the water bag is pulled out through the hole of the moisture-proof sheet stuck to the case opening. For this reason, during the long-term storage of the heating tool, moisture in the air may enter the inside of the case from the hole of the moisture-proof sheet, and this moisture may react with the heating agent.

  If the heating tool has caused water leakage as described above, or a reaction between the heating agent and moisture in the air, the reaction between the heating agent and water has already occurred even if the user pulls the string of the lunch box. Due to the progress or completion, the lunch box cannot be heated reliably.

The objective of this invention is providing the lunch box provided with the heat generating tool which can heat a lunch reliably.
Another object of the present invention is to provide a heating tool that is easy to reliably open a water bag and detect a water leak and is excellent in long-term storage.

  The present invention has a box having an opening on the upper surface and a hole that enables the following elongate opening device to be pulled out on the front side, a heating tool housed in the bottom of the box, and disposed on the heating tool A food tray and a lid that closes the opening of the box, and the heating tool is encapsulated with a heat-generating agent that generates heat when contacted with water, and the top surface is an easily tearable water-impermeable film. A water-tight container formed with the water-impervious bag body bonded and fixed on the water-impermeable film, water bags containing water, and the water-impermeable film and the water bag of the water-tight container. It is arranged in a state where it is bonded to the surface of the water-impermeable film, and one end is fixed to the near side of the box, watertight container or water bag, and the other end is on the rear side of the water bag. After being folded, it is passed through the hole on the front side of the box and is opened to the outside of the box In lunch box with a heating tool which comprises a.

A preferred embodiment of the lunch box provided with the heating tool of the present invention is as follows.
(1) The long opening device is a tape-shaped opening device.
(2) The tape-shaped opening device has a width in the range of 3 to 40 mm.
(3) A message composed of characters and / or codes is displayed on the surface of the tape-shaped opening device.
(4) The hole is cut from the upper side of the wall on the near side of the box.
(5) The easily tearable water-impermeable film of the watertight container is an aluminum foil.
(6) The water-impermeable film and the easily tearable bag are joined together by adhesion using a double-sided adhesive tape that is arranged in close proximity to the elongated opening device.
(7) A number of water vapor permeable holes are formed at the bottom of the food tray.
(8) The exothermic agent consists of a mixture of quicklime powder and aluminum powder.

  The present invention also provides a watertight container having an upper surface formed of an easily tearable water-impermeable film, encapsulated with a heat-generating agent that generates heat upon contact with water, and is bonded and fixed onto the water-impermeable film. A water bag containing water in an easily tearable bag body, and disposed between the water-impermeable film and the water bag of the watertight container in a state of being joined to the surface of the water-impermeable film, Is fixed to the front side of the watertight container or water bag, the other end is protruded from the rear side of the water bag, and the length of the protruding part is larger than the length of the watertight container in the front-rear direction. There is also a heating tool including a long opening tool.

Preferred embodiments of the heating tool of the present invention are as follows.
(1) The long opening device is a tape-shaped opening device.
(2) The tape-shaped opening device has a width in the range of 3 to 40 mm.
(3) A message composed of characters and / or codes is displayed on the surface of the tape-shaped opening device.
(4) The easily tearable water-impermeable film of the watertight container is an aluminum foil.
(5) The water-impermeable film and the easily tearable bag are joined by adhesion using a double-sided adhesive tape that is arranged in close proximity to the elongated opening device.
(6) The exothermic agent consists of a mixture of quicklime powder and aluminum powder.

  The heating tool provided in the lunch box of the present invention has a configuration in which a water bag filled with water is disposed on a watertight container filled with a heating agent. For this reason, even if there is a pinhole in the water bag or when the water is leaked due to a force applied to the long opening device when it is installed in the lunch box, this water leakage is easy to visually check. Can be detected. And the heating tool of the present invention has a good sealing state of the heating agent in a watertight container (like the heating tool of Patent Document 2, a long opening tool is attached to the moisture-proof film of the case in which the heating agent is sealed. It is not necessary to form a hole for passing through), and contact and reaction between the heat generating agent and moisture in the air are sufficiently suppressed, and therefore, excellent long-term storage property is achieved.

  Further, in the heating tool of the present invention, the water-tight container in which the heat generating agent is sealed by the elongated opening tool is opened by tearing the water-impermeable film on the upper surface together with the water bag, thereby opening the water-impermeable film. Water is directly put into a watertight container through the opening formed in the container, and the water and the heat generating agent are contacted and reacted. That is, unlike the heating tool of Patent Document 1, it is not necessary to tear the entire heating agent bag in which the heating agent is enclosed. Therefore, since the heating tool of the present invention has a low resistance to pulling the elongated opening tool, the user can surely open the water bag, thereby bringing the heating agent into contact with water and allowing the reaction to proceed reliably. be able to.

  And the lunch box of the present invention provided with the above heating tool is easy to detect the presence or absence of water leakage of the water bag (excluding defective heating tools) when the heating tool is incorporated in the lunch box. The reaction between the exothermic agent and the moisture in the air is sufficiently suppressed, and the user can be surely opened the water bag, so that the lunch box can be reliably heated.

  The lunch box provided with the heating tool of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an exploded perspective view showing a structural example of a lunch box provided with the heating tool of the present invention. 2 is a perspective view of the heating tool 13 provided in the lunch box 10 of FIG. 1, and FIG. 3 is a cross-sectional view of the heating tool 13 cut along the cutting line III-III written in FIG. .

  The lunch box 10 provided with the heating tool shown in FIG. 1 has an upper surface opened and a box 12 having a hole 11 on the front side that allows the following elongate opening tool 22 to be pulled out, and the bottom of the box 12. The heating tool 13 housed in the heating tool 13, the food tray 14 disposed on the heating tool 13, and the lid 15 that closes the opening of the box 12 are provided. A heat-generating agent 16 that generates heat upon contact is enclosed, and a water-tight container 18 formed of a water-impermeable film 17 whose upper surface is easily tearable, and an easily tearable material that is bonded and fixed onto the water-impermeable film 17. A water bag 21 in which water 20 is accommodated in a bag 19 and a water-impermeable film 17 in a watertight container 18 and the water bag 21 are arranged in a state of being joined to the surface of the water-impermeable film 17. , One end is fixed to the near side of the watertight container 18 and the other end It is characterized in that it includes a long opening device 22 that is bent on the rear side of the water bag 21 and then passes through the hole 11 on the near side of the box body 12 and protrudes to the outside of the box body 12. .

  In this specification, the “front side” means the side from which the opening tool is pulled out, that is, the side of the hole 11 of the box 12 shown in FIG. 1, and the “rear side” means the hole of the box 12. It means the side of the wall facing the wall on which the portion 11 is formed. That is, in FIG. 3, the right side of the figure is the “front side”, and the left side of the figure is the “rear side”.

  As shown in FIGS. 2 and 3, the heating tool (heating tool of the present invention) 13 provided in the lunch box 10 has a heat-resistant agent 16 that generates heat when contacted with water and has an easily tearable upper surface. A watertight container 18 formed of an impermeable film 17, a water bag 21 in which water 20 is accommodated in an easily tearable bag 19 joined and fixed on the water impermeable film 17, and a watertight container 18 It arrange | positions in the state joined to the surface of the water-impermeable film 17 between the water-impermeable film 17 and the water bag 21, and one end part is fixed to the near side of the watertight container 18, and the other end. From the elongate opening tool 22, the portion is protruded from the rear side of the water bag 21, and the length of the protruding portion is larger than the length in the front-rear direction of the watertight container 18 (length in the left-right direction in FIG. 3). It is configured.

  As shown in FIGS. 1 and 6, the heating tool 13 is in a state in which the end of the elongated opening tool 22 is passed through the hole 11 on the near side of the box 12 and protrudes to the outside of the box. Housed in the bottom of the box 12. The lunch box 10 is moved to the food tray 14 by heat or water vapor generated by the heating tool 13 when the user pulls the end of the elongated opening tool 22 protruding outside the lunch box or in the vicinity thereof. Heat the packed lunch.

  As shown in FIGS. 1 to 3, the heating tool 13 has a configuration in which a water bag 21 in which water 20 is sealed is disposed on a watertight container 18 in which a heating agent 16 is sealed. For this reason, even if the water bag 21 leaks due to the presence of a pinhole in the water bag 21 or when a force is applied to the elongate opening device 22 when it is incorporated into the lunch box 10, this water Leaks can be easily found visually. And the heating tool 13 has a good sealing state of the heating agent 16 in the watertight container 18 (like the heating tool of Patent Document 2, a long opening tool is attached to the moisture-proof film of the case in which the heating agent is sealed. There is no need to form a hole for passing through), and the reaction between the heat generating agent 16 and the moisture in the air is sufficiently suppressed, and therefore, it is excellent in long-term storage. As shown in FIG. 3, the exothermic agent 16 may be accommodated in a water-permeable bag (eg, a bag formed from a non-woven fabric) 16a in order to facilitate handling.

  When the elongate opening tool 22 of the heating tool 13 having such a configuration is pulled in the direction of the arrow written in FIG. 2, the opening tool 22 is applied to the surface of the water-impermeable film 17 by an adhesive (FIG. 3: 25b). Since it is bonded and fixed, the water-impermeable film 17 is torn and the watertight container 18 is opened as shown in FIG.

  When the elongated opening device 22 is further pulled, the water-impermeable film 17 is further torn, and the opening device 22 is fixed to the water bag 21 with an adhesive (FIG. 3: 25a). It is bonded and fixed to the water-impermeable film 17 by a double-sided adhesive tape (FIG. 1:23) arranged in parallel and close to the opening tool 22 (bonding of the water-impermeable film 17 and the easily tearable bag 19) However, as shown in FIG. 5, the easily tearable bag body 19 of the water bag 21 is torn and the water bag is opened. As a result, the water 20 accommodated in the easily tearable bag 19 of the water bag 21 flows into the container body 18a of the watertight container 18, and the exothermic agent 16 contacts and reacts with the water that has flowed into the container body 18a. Then, heat is generated and water vapor is generated by this heat generation.

  In this way, the heating tool 13 opens the water-tight film 18 in which the heat generating agent 16 is sealed by the long opening tool 22 by tearing the water-impermeable film 17 on the upper surface together with the water bag 21, thereby opening both Water 20 is directly put into a watertight container 18 through an opening formed in the water-impermeable film 17, and the water and the heat generating agent are brought into contact with each other to be reacted. That is, unlike the heating tool of Patent Document 1, it is not necessary to tear the entire heating agent bag in which the heating agent is enclosed. Accordingly, since the heating tool 13 has low resistance to pulling the elongated opening tool 22, the user can surely open the water bag, thereby allowing the heating agent and water to come into contact with each other and the reaction to proceed reliably. it can.

  The lunch box 10 provided with such a heating tool 13 is easy to detect the presence or absence of water leakage of the water bag 21 when the heating tool 13 is incorporated therein (exclude defective products of the heating tool) and is stored for a long time. The reaction between the exothermic agent 16 and the moisture in the air is sufficiently suppressed, and the user can be surely opened the water bag, so that the lunch box can be reliably heated.

  1 is joined to the surface of the water-impermeable film in order to open the water-impermeable film 17 on the upper surface of the watertight container 18. In addition, in order to tear and open the water bag 21 together with the water-impermeable film 17, the elongate opening device 22 is disposed between the water-impermeable film 17 and the water bag 21, and one end portion thereof. Is fixed to the front side of the watertight container (the surface of the water-impermeable film of the watertight container) 18 and the other end is bent at the rear side of the water bag 21, and then the front side of the box 12 of the lunch box 10 It passes through the side through-hole 11 and protrudes to the outside of the box. The one end of the long opening device 22 may be fixed to the near side of the outer surface of the watertight container 18, the near side of the water bag 21, or the near side of the box 12 of the lunch box 10. Good.

  As the long opening tool of the heating tool of the present invention, a string-like one can be used as in the conventional heating tool, but as shown in FIG. 1, a tape-shaped opening tool (long opening tool) is used. Preferably 22 is used. By using the tape-shaped opening device 22, as shown in FIG. 5, when the opening device 22 is pulled, the water-impermeable film 17 of the watertight container 18 opens greatly, and the water 20 of the water bag 21 becomes a watertight container. This is because it becomes easy to flow in and more water vapor can be released to the outside through this opening, so that the heating capability of the heating tool in a short time can be increased.

  In addition, as shown in FIG. 1, a message composed of letters and / or symbols (“Thank you for me” in the case of the opening device 22 shown in FIG. 1) is displayed on the surface of the tape-shaped opening device 22. It is preferable.

  When the message is displayed on the opening tool 22, when the user pulls the end of the opening tool 22 protruding outside the box 12 of the lunch box 10 shown in FIG. First, the user can check a part of the message as shown in FIG. 7, and when the end of the opening device is further pulled, more parts of the message can be checked as shown in FIG.

  The long opening device provided in the conventional lunch box is used only for the purpose of warming the lunch before the user eats. However, by configuring the long opening device 22 from a tape-shaped opening device on which a message consisting of characters and / or codes is displayed, the opening device 22 is given to the user before the lunch of the lunch box. , And can be used as an information transmission medium for transmitting messages after meals.

  For example, a user of a lunch box with a lunch box such as a station lunch has a relatively long time during and after the lunch until the lunch is warmed. As shown in FIG. 7, paying attention to what is displayed when looking at the characters (part of the message) displayed on the opening device 22 as shown in FIG. Showing very high interest. For this reason, the tape-shaped opening device 22 on which the message is displayed has a very high information transmission property, and can effectively transmit the message to the user.

The example of the message displayed on such a tape-shaped opening tool 22 is described below.
(1) Thanks to the user (the person who bought the lunch) like the tape-shaped opening device 22 of the lunch box 10 in FIG. 1, or a short sentence such as a saying or saying To do.
(2) An advertisement such as “Lunch box XX company” or “Taxi order to XX company” is displayed together with a telephone number like the tape-shaped opening device 92 of the lunch box 90 of FIG.
(3) Display “win” or “off”, etc., give the opening device the function of a bag, and give a prize if “win” is displayed on the opening device of the user's lunch box. Alternatively, “Today's fortune is XX” is displayed, and the opening tool has a fortune-telling function. By using a bag or fortune-telling with such an opening device, the user of the lunch box can enjoy the time from before the meal to after the meal.

  The tape-shaped opening tool 22 preferably has a width in the range of 3 to 40 mm. When the opening width of the tape-shaped opening device is less than 3 mm, the opening of the water-impermeable film formed when the opening device is pulled becomes small, and the amount of water flowing from the opening into the water-impermeable container is small. This is because the heating capability of the heating tool in a short time tends to decrease due to the decrease, and the size of characters that can be displayed on the surface of the opening tool becomes too small. On the other hand, if the width of the tape-shaped opening device exceeds 40 mm, when the user pulls the opening device, it becomes difficult to pull the opening device due to wrinkling or folding of the opening device, and when eating a lunch box. This is because the opening device may get in the way. If the adhesive and the release paper are attached to the tip of the tape-shaped opening device in advance, the opening device pulled out from the box is placed along the side of the box, for example. Since it can be fixed at the tip, the opening device can be kept out of the way during a meal, and the message displayed on the surface of the opening device can be easily read during a meal. Can be placed.

  The tape-shaped opening device 22 is preferably formed from a resin film such as a polypropylene resin film or a polyester film (eg, polyethylene terephthalate resin film) or a synthetic paper.

  The details of the lunch box 10 and its heating tool 13 will be described below.

  Each of the box body 12, the food tray 14, and the lid body 15 of the lunch box 10 of FIG. 1 is made of, for example, polystyrene resin. Examples of these materials include resin materials typified by polyethylene resins and polypropylene resins in addition to the above polystyrene resins. The box 12 is preferably formed of a foamed resin so as not to let the heat generated by the heat generating agent 13 escape to the outside and the heat retention of the heated lunch box is improved. Each of the box 12, the food tray 14, and the lid 15 is made of a paper material such as cardboard or a cardboard sheet that has been subjected to water-resistant processing (for example, paper having an aluminum foil, a resin film, or foamed paper attached to the surface). Material).

  Moreover, as shown in FIG. 1, it is preferable that the hole part 11 for letting the elongate opening tool 22 of the box 12 pass is a cut cut from the upper side of the wall on the near side of the box. When the hole 11 reaching the upper end of the wall of the box 12 is provided in this way, after the heating tool 13 is accommodated in the bottom of the box 12, the upper end of the wall of the box 12 is accommodated in the hole 11. Since the elongate opening tool 22 can be inserted and passed through, the operation of incorporating the heating tool 13 into the box 12 is facilitated. In addition, when the hole 11 having such a shape is assembled by folding the wall of the box 12 from a single sheet into a cylindrical shape, both ends of the sheet are abutted and brought into contact with each other at the position of the hole 11. It can be formed by adhering only a part of the contact portion on the lower side of the box. As a result, the box 12 having the hole 11 can be easily manufactured.

  As described above, by using the heating tool 13 of the present invention, a large amount of water vapor can be released from the opening of the water-impermeable film 17 of the watertight container 18 formed by being torn by the elongated opening tool 22. it can. When heating such a lunch by effectively using such water vapor, it is preferable that a large number of water vapor permeable holes 24a and 24b are formed at the bottom of the food tray 14, as shown in FIG.

  The plurality of water vapor permeable holes 24b formed in a row in the horizontal direction at the bottom of the food tray 14 are lunch boxes (for example, rice and side dishes) in which the water vapor generated by the heating tool 13 is placed in the food tray. It is effective to sufficiently heat the lunch box.

  Further, the water vapor discharge port 15a formed on the upper surface of the lid body 15 causes the water vapor guided above the lunch box by the water vapor permeable hole 24b to generate a flow toward the discharge port 15a. Since the high-temperature steam is successively introduced upward, the lunch box can be heated more effectively.

  The container body 18a of the watertight container 18 of the heating tool 13 shown in FIG. 1 is formed of, for example, a resin material such as polyethylene resin, polypropylene resin, polystyrene resin, polycarbonate resin, or polyvinyl chloride resin, or a metal material. It is formed from a resin material. In order to prevent the heat generated by the contact between the heat generating agent and water from escaping to the box body 12 side of the lunch box 10, it is also preferable to form the container body 18a from a foamed resin.

  And as the water-impermeable film 17 of the watertight container 18 shown in FIG. 1, the aluminum foil which shows easy tearability and water impermeability is used. Note that easy tearing means that the user can tear the water-impermeable film 17 by pulling the elongated opening device 22, and as shown in FIG. It is also included that tearing is possible in the state where 17a is provided. Further, the water impermeability means that the water has such a degree of water permeability that the water does not enter the watertight container 18 through the water impermeable film 17 when water leaks from the water bag 21. is doing.

  Examples of the water-impermeable film 17 include a resin film and a metal film (metal foil). Examples of the resin film include a polyethylene resin film, a polypropylene resin film, and a polyvinyl chloride resin film. A typical example of the metal film (metal foil) is aluminum foil. As the water-impermeable film, it is preferable to use a metal foil, particularly an aluminum foil, because it exhibits excellent tearability and water-impermeable properties.

  The water-impermeable film 17 is fixed to the upper end surface of the container body 18a by, for example, an adhesive or heat fusion. When an aluminum foil is used as the water-impermeable film 17 and is fixed to the upper end surface of the container body 18a by heat fusion, a resin layer is provided on the surface of the aluminum foil on the container body 18a side. Good. In addition, when a flange extending outward is formed on the upper edge of the container body, a water-impermeable film is stacked on the upper surface of the container body, and the water-impermeable film and the flange are pressurized and heated. Therefore, the container main body can be prevented from being damaged due to pressurization during heat fusion.

  The easily tearable bag 19 of the water bag 21 is formed from a resin film or a metal film (metal foil) in the same manner as the water-impermeable film 17 described above. Further, the easily tearable bag 19 may be provided with a cut 19 a that assists in tearing by the long opening device 22.

  There is no restriction | limiting in particular in the joining method of the easily tearable bag body 19 of this water bag 21, and the water-impermeable film 17, Both in positions other than the site | part opened by the elongate opening tool 22, For example, They can also be joined to each other with a gum tape or the like. As shown in FIG. 1, it is preferable that the two are bonded by a double-sided adhesive tape 23 that is disposed close to and parallel to the long opening device 22. Thereby, when the elongate opening tool 22 is pulled, the water bag 21 is not easily lifted from the water-impermeable film 17, and the water bag can be more reliably torn.

  In addition, as the heat generating agent 16 enclosed in the inside of the watertight container 18, a well-known thing, for example, a quicklime powder, Especially preferably, the mixture of quicklime powder and aluminum powder etc. can be used. An exothermic agent composed of a mixture of quicklime powder and aluminum powder is described in detail, for example, in JP-A-2001-226668.

  Further, a heat insulating material (for example) that makes it difficult to transfer the heat generated in the heating tool 13 to the bottom side of the box 12 between the box 12 of the lunch box 10 and the heating tool 13 accommodated in the bottom of the lunch box 10. A cardboard sheet) or a water absorbing material (for example, a sheet-like sponge or cardboard sheet) for absorbing water that slightly flows down to the bottom of the box 12 when the water bag 21 of the heating tool 13 is opened. You can also.

  FIG. 9 is a perspective view showing another configuration example of the lunch box provided with the heating tool of the present invention. The lunch box 90 shown in FIG. 9 has a structure in which the hole 91 is formed as a through hole extending in the lateral direction in the wall of the box 12 and the message displayed on the surface of the tape-shaped opening device 92 is displayed. Except for the difference, it is the same as the lunch box 10 of FIG. Thus, the hole 91 of the box 12 may be a through hole formed in the wall of the box 12.

  10 is a perspective view showing another configuration example of the heating tool of the present invention, and FIG. 11 is a cross-sectional view of the heating tool 113 cut along the cutting line XI-XI written in FIG. .

  The structure of the heating tool 113 shown in FIGS. 10 and 11 is the same as that of the heating tool 13 shown in FIGS. 2 and 3 except that the entire watertight container 118 is formed of a water-impermeable film 117. Thus, as the watertight container 118, a bag body entirely formed of a water-impermeable film can be used.

  The heating tool 113 is used by joining and fixing the entire bottom surface of the watertight container 118 to the bottom surface of the box of the lunch box or, for example, a heating agent tray 119 is accommodated inside the watertight container 118 as shown in FIG. In this state, it is used by placing it on the bottom of the box. This is because it is difficult to tear the water-impermeable film 117 and the water bag 21 on the upper surface of the water-tight container (a bag formed from a water-impermeable film) when the elongate opening device 22 is pulled. Because it becomes. In addition, the water-impermeable film 117 on the upper surface of the watertight container 118 is formed with a notch 117a that assists in tearing by the tape-shaped opening device 22, and the notch 117a is formed on the surface of the water-impermeable film 117. It is sealed with an opening tool 22 fixed with an adhesive 25b.

  The heating tool 13 shown in FIG. 2 and FIG. 3 requires a mold for molding when a resin molded product is used as the container main body 18a of the watertight container 18. The heating tool 113 shown in FIGS. 10 and 11 has an advantage that its manufacturing cost is low because it is not necessary to use a mold for its production. Note that the heating tool 113 can use, for example, an inexpensive general-purpose polystyrene resin food tray as the heating agent tray even when the heating agent tray 119 is accommodated in the watertight container 118.

  Use the lunch box provided with the heating tool of the present invention by using it as a lunch box for take-out sold at station stations, catered lunch boxes, convenience stores, etc., or for lunch boxes provided to victims in the event of a disaster It becomes possible to provide a warm lunch to the person stably.

It is a disassembled perspective view which shows the structural example of the lunch box provided with the heat generating tool of this invention. It is a perspective view of the heating tool 13 with which the lunch box 10 of FIG. 1 is provided. It is sectional drawing of the heating tool 13 cut | disconnected along the cutting line III-III line entered in FIG. It is a figure explaining operation | movement of the heat generating tool 13 of FIG. It is another figure explaining operation | movement of the heat generating tool 13 of FIG. It is a figure explaining the usage method of the lunch box 10 of FIG. It is another figure explaining the usage method of the lunch box 10 of FIG. It is another figure explaining the usage method of the lunch box 10 of FIG. It is a perspective view which shows another structural example of the lunch box provided with the heating tool of this invention. It is a perspective view which shows another structural example of the heat generating tool of this invention. It is sectional drawing of the heating tool 113 cut | disconnected along the cutting line XI-XI line entered in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Lunch box provided with heating tool 11 Hole 12 Box 13 Heating tool 14 Food tray 15 Lid 15a Water vapor outlet 16 Heat generating agent 16a Water-permeable bag 17 Water-impermeable film 17a Cut 18 Water-tight container 18a Container body DESCRIPTION OF SYMBOLS 19 Easily tearable bag 19a Notch 20 Water 21 Water bag 22 Long opening device 23 Double-sided adhesive tape 24a, 24b Water vapor-permeable hole part 25a, 25b Adhesive 90 Lunch box provided with a heating tool 91 Hole 92 Long 113 Opening tool 113 Heating tool 117 Water-impermeable film 117a Cut section 118 Watertight container 119 Heating agent tray

Claims (16)

  A box having an opening on the top and a hole on the front side that allows the following elongate opening device to be pulled out, a heating tool housed in the bottom of the box, and disposed on the heating tool It consists of a food tray and a lid that closes the opening of the box, and the heating tool is encapsulated with a heat generating agent that generates heat upon contact with water, and the upper surface is formed of an easily tearable water-impermeable film. A water-tight container, a water bag in which water is contained in an easily tearable bag that is bonded and fixed onto the water-impermeable film, and water between the water-impermeable film and the water bag of the water-tight container. It is arranged in a state where it is bonded to the surface of the impermeable film, one end is fixed to the front side of the box, watertight container or water bag, and the other end is bent at the rear side of the water bag. A long opening device that is passed through the hole on the near side of the box and protrudes outside the box. Lunch box with a heating tool, wherein.   The lunch box provided with the heating tool according to claim 1, wherein the elongated opening tool is a tape-shaped opening tool.   The lunch box provided with the heating tool according to claim 2, wherein the tape-shaped opening tool has a width in the range of 3 to 40 mm.   The lunch box provided with the heating tool of Claim 2 or 3 by which the message which consists of a character and / or a code | symbol is displayed on the surface of the tape-shaped opening tool.   The lunch box provided with the heating tool according to any one of claims 1 to 4, wherein the hole is a cut made from an upper side of the wall on the near side of the box.   The lunch box provided with the heating tool according to any one of claims 1 to 5, wherein the easily tearable water-impermeable film of the watertight container is an aluminum foil.   7. The method according to claim 1, wherein the water-impermeable film and the easily tearable bag are joined by a double-sided adhesive tape disposed in parallel with the elongated opening device. A lunch box equipped with the heating tool described in 1.   The lunch box provided with the heating tool in any one of Claims 1 thru | or 7 in which many water-vapor-permeable holes are formed in the bottom part of the food tray.   The lunch box provided with the heating tool according to any one of claims 1 to 8, wherein the exothermic agent is a mixture of quicklime powder and aluminum powder.   A water-tight container formed with a water-impermeable film with an easily tearable surface, encapsulating a heat generating agent that generates heat upon contact with water, and an easy-tearable material bonded and fixed on the water-impermeable film A water bag in which water is contained in a bag, and a water-impermeable film in a watertight container and the water bag are arranged in a state of being bonded to the surface of the water-impermeable film, and one end portion is A long opening device that is fixed to the front side of the watertight container or water bag, the other end protrudes from the rear side of the water bag, and the length of the protruding part is larger than the length of the watertight container in the front-rear direction. Including heating tools.   The heating tool according to claim 10, wherein the long opening device is a tape-shaped opening device.   The heating tool according to claim 11, wherein the tape-shaped opening tool has a width in the range of 3 to 40 mm.   The heating tool according to claim 11 or 12, wherein a message composed of characters and / or symbols is displayed on the surface of the tape-shaped opening tool.   The heating tool according to any one of claims 10 to 13, wherein the easily tearable water-impermeable film of the watertight container is an aluminum foil.   15. The method according to any one of claims 10 to 14, wherein the water-impermeable film and the easily tearable bag are joined by a double-sided adhesive tape disposed in parallel with the elongated opening device. The heating tool described in.   The heating tool according to any one of claims 10 to 15, wherein the heating agent is a mixture of quicklime powder and aluminum powder.

Images