JPH0725306Y2 - Breaker for self-heating or canned cooling - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is a chemistry that causes an exothermic or endothermic reaction in a thermal reaction chamber that is separated from the contents such as beverages and foods contained in a can body by a partition wall. A substance and a liquid reaction inducing agent that induces a thermal reaction of this chemical substance are housed in a state of being separated by a wall of a sealed container in which the reaction inducing agent is enclosed, and the contents are heated or cooled immediately before the contents are taken out. The present invention relates to a crushing tool for breaking a wall of a self-heating or cooling canned sealed container that causes a chemical reaction and a reaction inducer to cause a thermal reaction.

(Prior Art) Many types of this kind of canned food have been proposed, but as a crushing and breaking tool for breaking the sealed container containing the reaction inducing agent, a thin needle-shaped one or a plurality of cutting edges is provided at the tip. As it uses one, assembly work (thermal reaction chamber closing work)
In order to prevent the sealed container from being broken during the process of making a can, etc., the push-break tool must be attached to the outside of the can lid after the production of canned goods, or the length of the push-break tool must be set to ensure a sufficient distance between the sealed container and the tip. Since it is necessary to shorten the length and fix it to the inner surface of the can lid, there are drawbacks that the manufacturing work efficiency is low and the breaking operation is difficult, and improvement has been desired.

The present inventors have already classified a chemical substance that causes an exothermic or endothermic reaction and a reaction inducer that induces a reaction when the chemical substance comes into contact with each other and store them in a thermal reaction chamber that is provided so as to project into the can body. In addition, a canister capable of heating or cooling the contents such as the beverage contained in the can body is housed in the thermal reaction chamber of a crushing tool that breaks the partition wall of the chemical substance and the reaction inducing agent to bring them into contact with each other. Proposed (Practical application Sho 63-74167
issue).

This canned food has the structure shown in FIG. That is, the thermal reaction chamber 11 is formed in the can body by the inner cup 9 that projects deeply into the can body 8 from one end of the can body 8, and the contents of alcohol, beverages, etc. are provided between the inner cup 9 and the can body 8. A content-accommodating chamber 10 for accommodating a substance is formed, and a thermal reaction inducing agent 16 for inducing a reaction of a chemical substance, for example, water is accommodated in the inner cup 9, and a hermetically sealed container 17 is first accommodated. On the upper wall 17a of this hermetically sealed container, a cylindrical cutting edge 32 is connected to the lower end of the rod-shaped body 31 by several supporting arms 33, and several L-shaped supporting pieces are provided on the side of the cutting edge 32. A leg 35 is formed, and an integrally molded crusher 30 having a weakening portion 36 provided at the connecting portion between the cylindrical blade edge 32 and the supporting leg 35 is placed, and in the space above it, a granular chemical substance is placed. A substance (for example, quicklime) is filled (not shown), and the inner cup 9 is sealed with a bottom lid 18 which is formed so as to be deformable inwardly of the can body.

A through hole 34 is formed between the cylindrical cutting edge 32 and the supporting arm 33, and the lower end of the supporting leg 35 is at the upper wall 17 of the hermetically sealed container.
It is placed near the outer periphery of a.

On the other hand, after the contents storage chamber 10 is filled with the contents 7 such as a beverage, the opening of the can body 8 is closed by the easy-open top cover 21 (the easy-open structure is not shown).

To eat and drink the canned contents, first, the central portion of the bottom lid 18
40 is strongly pressed with a thumb or the like, and the central portion 40 of the bottom lid 18 is moved to the can body 8
Displace a large amount inward. Then, the inner surface of the bottom lid 18 and the upper end of the rod-shaped body 31 of the push-break tool come into contact with each other, and the support leg 35 of the push-break tool is strongly pressed against the upper wall 17a of the sealed container 17, and as a result, the weakened portion 36 is bent. The stress concentrates and the supporting leg 35 breaks at this portion, and the blade edge 32 is pushed into the upper wall 17a of the sealed container and breaks the upper wall 17a.

Then, when the canned goods are placed upside down, the water in the sealed container 17 comes into contact with the quicklime stored in the space through the through hole 34 of the crushing tool.

As a result, quicklime causes an exothermic reaction, and the heat heats the beverage and the like in the can body 8. If an endothermic reaction substance such as ammonium nitrate is used as the chemical substance, an endothermic reaction occurs and the beverage or the like is cooled.

(Problems to be solved by the invention) In the above-mentioned canned food, the push-breaking tool 30 is not needle-like as is found in many conventional self-heating or cooling canned goods, and the cutting edge 32 is provided at the lower end of the push-breaking tool 30. Since it has a plurality of support legs 35 that extend downward than the
It has been found that while the insertion work of 30 is easy (it is only necessary to place it on the sealed container 17), there are the following problems.

This type of can is usually packaged and shipped with the easy-open top lid 21 that is the opening of the contents facing up (the opposite of Fig. 8), but in this state, the sealed container 17 is pushed. It will be supported by the support legs 35 of the tear tool. Then, when receiving a strong drop impact during transportation or the like, the hermetically sealed container 17 moves upward and collides with the bottom surface of the thermal reaction chamber, and in reaction to this, it moves downward and strongly collides with the support leg 35, so that the connection portion with the blade edge 32 is formed. The weakened portion 36 is bent, and the blade edge 32 is formed on the upper wall 17a of the sealed container.
May break.

On the other hand, if the wall thickness of the weakened portion 36 is increased in order to prevent bending, a large force is required to break the broken portion 36, which makes it difficult to operate.

Further, the upper wall 17a of the hermetically sealed container and the blade edge 32 of the crushing tool are spaced apart by the support leg 35 extending longer than the blade edge 32, but the canned product is high during transportation or the like. When dropped, the reaction inducing agent (water, etc.) in the sealed container 17 suddenly moves and presses and deforms the thin upper wall 17a outward, so that the upper wall 17a and the cutting edge 32 come into contact and break. May occur.

An object of the present invention is to provide a can breaker for heating or cooling the contents, in which the above problems are alleviated or almost eliminated.

(Means for Solving Problems) The present invention has been made in order to achieve the above object, and is a chemical substance that causes an exothermic or endothermic reaction in a thermal reaction chamber that is separated from a content storage chamber by a partition wall. A push-break tool that is placed on the upper wall to break the thin upper wall of the hermetically-sealed container that contains the liquid reaction inducer and is located at the central portion of the upper wall. It comprises an elongated rod-shaped body extending in a direction perpendicular to the rod-shaped body, and a plurality of rod-shaped supporting legs extending in a direction substantially perpendicular to the rod-shaped body from the lower end of the rod-shaped body to the vicinity of the periphery of the upper wall, and the lower surface of the intermediate portion of the supporting leg. Side is crossed in the width direction of the support leg, and has a cut-out portion that is cut off. By pressing the rod-shaped body toward the upper wall, the support leg bends at the cut-out portion, and the cut-out portion forming surface and the lower surface of the support leg are formed. Of the upper wall at the connecting part with A device for pushing and breaking self-heated or cooled canned products, characterized by initiating rupture.

In addition, it is preferable that the connecting portion between the cutout forming surface and the lower surface of the support leg is angular or has a radius of curvature of 0.5 mm or less.

Further, it is preferable that the length from the center of the lower end of the rod-shaped body to the surface of the excised portion on the rod-shaped body side is 1/2 or less of the length from the center of the lower end of the rod-shaped body to the tip of the support leg.

This crushing tool can be easily integrally molded by injection molding using a synthetic resin that is hard but not brittle.

(Operation) In order to manufacture a self-heating or cooling canned product using the push-break device of the present invention, first, the contents are filled in the contents storage chamber by a conventional method, and the upper lid is wound around the opening to close the contents storage chamber. Seal.

Next, after placing the sealed container containing the liquid reaction inducer in the thermal reaction chamber, put it on the upper wall of the sealed container with the supporting leg side of the crushing tool down, and from above it, place the required amount of chemical substance. And then the opening of the thermal reaction chamber is closed by means such as tightening the bottom lid (see FIG. 3).

Now, in the above-mentioned canned product equipped with the crusher of the present invention, it is the crusher that comes into contact with the upper wall of the hermetically sealed container when the bottom lid side is down (inverted state from the state of FIG. 3). The whole lower surface of a plurality of rod-shaped support legs extending outward from the lower end of the rod-shaped body in a direction substantially perpendicular to the rod-shaped body.Therefore, both sides of the cutout portion also come into contact with the upper wall. Even if it is subjected to vibration in the direction or drop impact, the support leg is less likely to bend at the weakened part, and at that time, the upper wall of the sealed container is damaged due to the water hammer phenomenon caused by the movement of the liquid reaction inducer. Even if it receives an outward deforming force, it is supported by the lower surfaces of the plurality of support legs extending from the central part to the outside, and in addition, there are no sharp cutting edges near the support legs. The wall will not break.

In order to allow the canned food to self-heat or cool using the push-break tool of the present invention, first place the canned food with the bottom lid facing up (state of FIG. 3), and firmly press the bottom lid with the thumb or the like inside the can body. When pushed inward, the bottom lid is inverted and lowered, and its inner surface hits the upper end of the rod-shaped body of the crushing tool, and strongly pushes the crushing tool toward the upper wall of the sealed container containing the reaction inducing agent.
The push-break tool is in contact with the upper wall surface of the sealed container on the lower surface of the support leg that extends outward from the central portion of the lower end, but when the strong pressing force from above is applied, the support leg becomes thin. The weakened portion is bent, and the pressing force is concentrated on the lower surface of the support leg on the center side (bar-shaped body side) of the weakened portion and pushes the upper wall of the sealed container (see FIG. 4).

Then, when the canned food is placed upside down, the liquid reaction inducer flows out from the broken portion of the upper wall of the sealed container, comes into contact with the chemical substance, and flows down while inducing an exothermic or endothermic reaction of the chemical substance.

By this reaction, the contents stored in the contents storage chamber are heated or cooled.

The lower surface of the middle part of the support leg is cut across the width direction of the support leg, and the connecting part between the cut surface (cavity) forming surface and the lower surface of the support leg is angular or has a radius of curvature of 0.5 mm or less. The following is a detailed description of the process leading to the breakage of the upper wall of the hermetically sealed container when the pushing and breaking tool is used.

When a pressing force is applied to the breaking tool from above, the supporting legs press the upper wall of the sealed container and push down (deform) the upper wall, but the degree of deformation of the upper wall at that time becomes larger in the center, The support leg has a large rod-like body side and a smaller extent toward the leading end side (a bent state) in accordance with the degree of deformation.

When the difference between the lowering direction of the rod-shaped body and the tip side of the support leg becomes larger than a certain value, the support leg bends from the excised part, and from that point, the pressing force from above on the whole support leg is removed. Concentrate on the part on the rod-like side of the part, and the connecting part that is the end of the excision part is square (or 0.
Since the radius of curvature is 5 mm or less, the upper wall of the part that was in contact with the connecting part immediately ruptured, and then the upper wall of the part that was in contact with the rod-shaped body side of this support leg started from this ruptured part. The fracture progresses immediately.

Also, the length of the portion sandwiched between the excised portion of the support leg and the rod-shaped body,
That is, when the length from the center of the lower end of the rod-shaped body to the surface on the rod-shaped body side of the cutout portion is set to 1/2 or less of the length from the center of the lower end of the rod-shaped body to the tip of the support leg, the support leg is cut off. Since the pressing force from above after bending from the center is concentrated on the supporting leg portion having a small area, breakage occurs even with a small pressing force.

(Embodiment 1) FIG. 1 is a view showing a crushing tool of this embodiment, (A) is a front view, (B) is a plan view, (C) is a bottom view, and (D) is (B). It is a longitudinal cross-sectional end view cut by XX line,
The figure is an enlarged view showing a weakened portion provided on the support leg of the crushing tool. (A) is an enlarged view of a portion surrounded by a broken line in FIG. 1 (D), (B) is a bottom view thereof, ( C) is Y of (A)
It is an end view cut by the -Y line. 3 to 4 are longitudinal sectional views of a main part of a can for heating the contents using the crushing tool of this embodiment, and FIG. 3 shows a state before the upper wall of the sealed container is broken, FIG. 4 shows a state immediately after the upper wall of the sealed container is broken.

FIG. 5 is a plan view showing the shape of the fractured portion of the upper wall of the hermetically-sealed container, which is fractured by using the pushing and breaking tool of this embodiment.

Reference numeral 1 denotes a push-break tool integrally molded of synthetic resin, which has an elongated rod-shaped body 2 having a Y-shaped cross section (provided that it extends in three directions from the center at 120 ° intervals) and a rod-shaped body 2 from the lower end of the rod-shaped body 2.
Is provided with three support legs 3 extending substantially at right angles to the vicinity of the periphery of the upper wall. Each support leg 3 is rod-shaped,
Further, there is a weakened portion 4 formed by forming a cut portion which is cut across the lower surface side of the intermediate portion in the width direction, and the lower surface 5 of the portion other than the weakened portion 4 is made to be substantially coplanar.

Further, as is clear from FIG. 1 (D) and FIG. 2 (A), the cut-out portion 6 forming the weakened portion 4 has a surface 7 on which the rod-shaped body 2 side is substantially vertical.
Was formed. R of the connecting portion between the vertical surface 7 and the horizontal surface of the lower surface 5 of the supporting leg 3 is about 0.2 mm, and the length from the center of the lower end of the rod 2 to the connecting portion between the vertical surface 7 and the supporting leg lower surface 5 is set. Was about 10 mm, and the length from the center of the lower end of the rod 2 to the end surface of the support leg 3 was about 26 mm.

In addition, each support leg 3 has a width and a thickness of about 3.0 mm,
The width and the thickness of the weakened portion 4 were about 2.1 mm and about 0.9 mm, respectively.

The length of the rod-shaped body 2 is such that when the support leg 3 is placed on the upper wall 17a of the sealed container placed on the bottom wall 13 of the thermal reaction chamber 11, the upper end thereof is on the inner surface of the central portion 40 of the bottom lid. Decide so that they are close to each other.

The crushing tool 1 of this example is 80 parts by weight of a styrene-based resin (trade name "Esstyrene G14" of Nippon Steel Chemical Co., Ltd.) and a butadiene-styrene resin (trade name of Nippon Steel Chemical Co., Ltd.). KR05 ") 20 parts by weight was mixed and injection molded.

8 is a cylindrical metal can body, and an easy-open can lid 21 (an easy-open structure is not shown) that can easily open an opening for pouring out the contents at one end thereof is double-wound. It is fixed by the method.

Reference numeral 9 denotes an inner cup made of metal, which has a substantially inverted circular truncated cone shape having a side wall 12 and a bottom wall 13, and is deeply projected (or thrust) into the inside of the can body 8 from the other end side of the can body 8. The open ends of both are fixed by a double winding method. The inner cup 9 divides the can body 8 into two large chambers, and the first storage chamber 10 for storing contents 14 (for example, sake, soup, coffee, tea, milk, medicine) which are preferably heated or cooled. Is formed by the inner surface of the can body 8 and the outer surface of the inner cup 9,
A second storage chamber (heat) for separately storing a chemical substance 15 (for example, quick lime, ammonium nitrate, ammonium chloride, urea) that causes an exothermic or endothermic reaction and a reaction inducer 16 (for example, water) that induces a reaction of the chemical substance. A reaction chamber 11 is formed by the inner surface of the inner cup 9.

Reference numeral 17 denotes a hermetically sealed container in which a liquid reaction inducer 16 is filled, an opening is covered with an upper wall 17a, and a flange portion of the opening and an outer edge portion of the upper wall 17a are welded by heat sealing.

In this example, the body and the bottom were made by pressure molding a polypropylene resin, and the upper wall 17a was made by coating the inner surface of the aluminum foil with a chlorinated polypropylene resin and an adhesive for polypropylene.

Granular quicklime was used as the chemical substance 15 (only a part is shown in FIGS. 3 and 4), and red colored water was used as the reaction inducer 16.

Reference numeral 18 denotes a metal bottom lid that closes the open end of the second storage chamber (thermal reaction chamber) 11, and has an annular inclined portion 41 that projects toward the outside of the can body 8 toward the center thereof. , Inclined section
A flat plate-shaped central portion 40 following 41 is provided, and is tightly wound around and fixed to a tightly wound portion between the can body 8 and the inner cup 9. The central portion 40 is located inside the top portion 43 of the bottom lid 18 so as not to be pushed in accidentally.

Incidentally, 42 is a small hole through which high-pressure steam generated by a thermal reaction between quick lime 15 and water 16 can be escaped, and usually, paper is stuck and sealed.

In this example, the bottom cover 18 was made of an aluminum alloy having a plate thickness of 0.20 mm.

Reference numeral 19 denotes a partition plate made of a material having a high water-absorbing property, which is a disc shape having an outer diameter slightly smaller than the inner diameter of the inner cup 9, and is slightly larger than the outer diameter of the rod-shaped body 2 of the crusher in the central portion. It has a small hole with an inner diameter.

In this example, the partition plate 19 was formed by stacking 20 sheets of thin cotton paper, with one side being partially bonded with a thin kraft paper, in a two-tier stack, and punching out small holes in a circular shape.

Reference numeral 22 is a corrugated cardboard holding plate used to reduce the roughness of the granular chemical substance 15, and a small hole 23 having an inner diameter slightly larger than the outer diameter of the rod-shaped body 2 of the crushing tool at the center.
Is equipped with.

The canned goods of this example were manufactured in the following order.

First, the bottom wall 13 and the side wall 12 of the inner cup are inserted into the can body 8 and the open ends of the can body 8 and the inner cup 9 are double-wound.

Next, the content (soup) 14 is heated and filled into the first storage chamber 10 through the opening on the other end side of the can body 8, and the easy-open can lid 21 is double-wound and sealed at the opening.

At this stage, the canned food is stored in a retort sterilization kettle and heat-sterilized under predetermined conditions.

After being taken out from the retort sterilization kettle, the hot melt adhesive 15 is heated and applied to the bottom wall 13 of the inner cup 9 that constitutes the thermal reaction chamber (second storage chamber) 11, and immediately a sealed container that stores water. 17 is placed on the bottom wall 13 of the inner cup 9 and pressed from above to join them. Next, the partitioning plate 19 in which the rod-shaped body 2 is passed through the small hole is placed on the support leg 3 (the kraft paper side is facing up), and the push-break tool 1 is attached to the upper wall 17a of the sealed container. Then, the thermal reaction chamber 11 is filled with crushed and crushed quicklime 15.

After that, place the holding plate 22 on the quicklime 15 (holding plate 22
After passing the rod-shaped body 2 through the small hole 23), the bottom lid 18 is fixed by covering the opening of the thermal reaction chamber 11 with the bottom lid 18 and winding.

To drink the canned contents, first, the center portion 40 of the bottom lid is strongly pressed downward with the thumb to turn the bottom lid 18 downward.

Then, the upper end of the rod-shaped body 2 comes into contact with the inner surface of the bottom lid 18 and a downward pressing force is applied to the crushing tool 1, but the supporting leg 3 comes into contact with the upper wall 17a of the hermetically sealed container to prevent the downward movement. Therefore, the support leg 3 is bent at the weakened portion 4 which is a thin portion,
As a result, the pressing force is concentrated on the central portion side of the support leg 3, and the connecting portion between the substantially vertical surface 7 of the cutout portion 6 and the support leg lower surface 5 is the upper wall.
Break through 17a.

In this embodiment, since the connecting portion between the vertical surface 7 of the cut-out portion 6 of the supporting leg and the lower surface 5 of the supporting leg is a right angle and is substantially angular, the upper wall 17a of the hermetically sealed container is broken before it is bent so much. Occurs.

When a break occurs in one portion, the upper wall 17a of that part largely bends (the breakage also progresses), so that the other part does not normally break, and the broken part 24 has an elongated shape as shown in FIG.

At this time, the partition plate 19 is in a state in which the outer edge portion is slightly bent upward due to the bending of the lower support leg 3 and the weight of the quicklime 15 above (see FIG. 4).

Next, the canned food is placed upside down (Easy open can lid 21
Side 16), water 16 flows out from the broken portion of the upper wall 17a, part of which passes between the inner surface of the small hole of the partition plate and the outer surface of the rod-shaped body 2, and the other part of the bottom surface of the partition plate 19. While flowing down the side, it passes between the outer edge of the partition plate 19 and the inner surface of the thermal reaction chamber 11, and contacts the quick lime 15 contained in the thermal reaction chamber 11 to cause an exothermic reaction in the quick lime. Let

Since the shape of the broken portion 24 is elongated, water slowly flows out from the broken portion, and the partition plate 19 is made of a material that easily absorbs water, and the water flows down on the partition plate 19 or passes through the small holes of the partition plate. At that time, a part of it is absorbed by the partition plate 19, so the flow-down speed is further weakened, and the partition plate 19
Since the gap between the outer edge of the and the inner surface of the thermal reaction chamber 11 and the gap between the small hole of the partition plate and the rod-shaped body 2 are narrow (they do not spread), water slowly flows down. As a result, water 16 and quicklime
Contact with 15 is sufficient and extensive. Therefore, the water does not sufficiently contribute to the exothermic reaction and does not flow down to the bottom cover 18 at once.

After the exothermic reaction is completed, the easy-open can lid 21 is opened and the heated content (soup) 14 is drunk.

The reason why the water is colored in the present embodiment is to make it easier to see when the presence or absence of water leakage is inspected by pressing the sealed container 17 after sealing the water in the sealed container 17.

(Embodiment 2) FIG. 6 is a view showing a pushing and breaking tool according to a second embodiment of the present invention. FIG. 6A is a longitudinal sectional view of the same portion as FIG. 1D, and FIG. It is an expanded longitudinal cross-sectional view of the weakening part provided in the leg.

FIG. 7 is a plan view showing the shape of the fractured portion of the upper wall of the hermetically sealed container, which is fractured by the crushing tool of this embodiment.

The present embodiment differs from the first embodiment only in the structure of the weakened portion 4 provided on the support leg 3.

That is, in the push-break tool 1 of the present embodiment, the cut-out portion 6 forming the weakened portion 4 on the support leg 3 forms the inclined surface 25 on the rod-shaped body 2 side and the vertical surface 26 on the opposite end side of the support leg 3 is formed. Is formed.

In this embodiment, the angle between the inclined surface 25 and the lower surface 5 of the support leg 3 is set to 23 °, and the thickness of the thinnest portion of the weakened portion 4 is 0.85.
mm and the same as Example 1 except that the length from the center of the lower end of the rod-shaped body 2 to the connecting portion between the inclined surface 25 and the support leg lower surface 5 was about 5 mm.

The pushing and breaking tool 1 of the present embodiment also has good workability in the production of canned goods, and the upper wall 17a of the hermetically sealed container due to vibration and impact during transportation of canned goods.
Has the advantage of not breaking.

When the upper wall 17a of the sealed container is ruptured, the length from the center of the lower end of the rod-shaped body 2 to the connecting portion between the inclined surface 25 and the support leg lower surface 5 is as short as 5 mm.
The force required to break 7a is only about 30% greater than in Example 1.

In the push-break tool 1 of this embodiment, the shape of the broken portion 24 of the upper wall 17a, which is broken, is substantially Y-shaped and large as shown in FIG. 7, so that there is no inconvenience even if the reaction inducer flows down quickly. Suitable when using fine chemicals such as ammonium chloride and ammonium nitrate.

(Effect of the Invention) The push-break tool of the present invention has a plurality of supporting legs extending from the lower end of the elongated rod-shaped member to the rod-shaped member 2 in a direction substantially perpendicular to the vicinity of the upper wall and an intermediate portion of the supporting legs. Since it has only a weakened part, and there is no sharp edge on the side that comes into contact with the sealed container containing the liquid reaction inducer, it is placed on the sealed container during canning manufacturing work. Since it is sufficient to place it, therefore, the workability is better than that of the conventional push-and-break tool having a sharp tip. Further, the upper wall of the hermetically sealed container is in contact with almost all of the lower surfaces of the plurality of support legs extending from the lower end to the rod-shaped body 2 in a direction substantially perpendicular to the upper wall 17a and in the vicinity of the periphery of the upper wall 17a. The support leg is less likely to bend at the weakened part even when subjected to the vibration or drop impact, and at that time, the upper wall of the sealed container is deformed outward due to the water hammer phenomenon caused by the movement of the liquid reaction inducer. Received
In addition to receiving this on the underside of multiple support legs,
Since there is no sharp cutting edge or the like near the support leg, the upper wall is not broken.

Furthermore, when causing a thermal reaction between the chemical substance and the reaction inducer, the weakened part of the supporting leg bends only by pressing strongly from the top of the bottom lid, and then the upper wall of the sealed container is ruptured, so the operation is easy. The effect is simple and there is no failure.

[Brief description of drawings]

1 and 2 are views showing a first embodiment of the present invention.
In the figure, (A) is a front view, (B) is a plan view, and (C).
Is a bottom view, (D) is an end view of a vertical section taken along line X-X of (B), and in FIG. 2, (A) is an enlarged vertical section taken along the broken line in FIG. 1 (D). Figure, (B) is the bottom view,
(C) is an end view taken along line YY of FIG. 2 (A). 3 and 4 are longitudinal cross-sectional views of a main part of a self-heating can using the crushing tool of Example 1, FIG. 3 shows a state before the upper wall of the sealed container is broken, and FIG. The state immediately after breaking down the upper wall of a sealed container by pushing down a tool is shown. FIG. 5 is a plan view of the upper wall of the hermetically-sealed container, which is broken by using the crushing tool of the first embodiment. FIG. 6 is a view showing a second embodiment of the present invention, in which (A) is a longitudinal sectional end view taken at the same portion as FIG. 1 (D), and (B) is a broken line of (A). It is an enlarged view of the enclosed part. FIG. 7 is a plan view of the upper wall of the hermetically-sealed container, which is broken by using the crushing tool of the second embodiment. FIG. 8 is a longitudinal sectional view of a main part of self-heating or a cooling canned product using the already proposed push-breaking tool. 1,30… Ripper, 2,31… Bar, 3,25… Support legs, 4,36
... weakened part, 5 ... lower surface of support leg, 6 ... cut-off part, 7 ... vertical surface, 10 ... contents storage chamber (first storage chamber), 11 ... thermal reaction chamber (second storage chamber), 14 ... contents , 15 ... Chemical substance, 16 ... Reaction inducer, 17 ... Sealed container, 17a ... Upper wall of sealed container

Claims (3)

[Scope of utility model registration request] 1. A thin upper wall of a hermetically sealed container, which is housed together with a chemical substance that causes an exothermic or endothermic reaction in a thermal reaction chamber which is separated from a content storage chamber by a partition wall, and which seals a liquid reaction inducer. Therefore, it is a push-break tool placed on the upper wall, which is an elongated rod-shaped body located in the central portion of the upper wall and extending in a direction perpendicular to the upper wall, and from the lower end of the rod-shaped body to the periphery of the upper wall. A plurality of rod-shaped support legs that extend in a direction substantially perpendicular to the rod-shaped body, and further has a cut portion that is cut across the lower surface side of the middle portion of the support legs in the width direction of the support legs, Self-heating or cooling, characterized in that the support leg is bent at the cut portion by pressing the body toward the upper wall, and the upper wall starts to break at the connecting portion between the cut portion forming surface and the lower surface of the support leg. Canning and tearing tool. 2. The pushing and breaking tool according to claim 1, wherein the connecting portion between the cutout forming surface and the lower surface of the support leg is angular or has a radius of curvature of 0.5 mm or less. 3. The length from the center of the lower end of the rod to the surface of the cut portion on the rod side is half or less of the length from the center of the rod to the tip of the support leg. The pushing and breaking tool according to claim 1 or 2.