JPH0620471Y2 - Insulated container for cooked dishes - Google Patents

Description

[Detailed description of the device] [Industrial application field] This device is mainly used for room service such as hotels,
The present invention relates to a heat-retaining container for cooked dishes, which is used for lunch at hospitals and the like.

[Conventional technology]

Traditionally, when providing cooked dishes such as bread, omelettes, soups, pilafs, stews, steaks, and other cooked foods that require heat insulation for room service in hotels, etc., cook a hollow hemispherical cover made of metal or the like By covering the plate with the ready-made food, it was intended to prevent dust and dirt from entering during transportation and to delay cooling.

However, as described above, in the method of keeping the temperature using a cover made of a metal such as a hollow hemisphere, the appropriate temperature duration is very short, and the dish is immediately cooled.

Therefore, as a heat retaining container set for cooked dishes that can obtain a heat retaining effect for a long time at an appropriate temperature, there is a proposal of Japanese Patent Application No. 32-32646 devised by the present inventor.

As shown in FIG. 8, this heat-retaining container set has a metal hollow shell body formed in a dish shape, and the heat storage agent (3) having a property that it is difficult to cool the hollow portion for a long time once heated (3)
It comprises a container (1) in which

Two of these containers (1) are preheated by an appropriate method, and cooked foods and the like are stored in an internal space in which the open ends (11) are opposed to each other and overlap each other.

The heat insulating container (1) is provided with a protrusion (61) and a dent (62) that engages with the protrusion (61) at the joint (6) in order to enhance the airtightness of the internal space when they are stacked.

The use of such a heat retaining container set has an advantage that it is possible to obtain a heat retaining effect for a long time at an appropriate temperature.

However, forming the dent portion (62) in the heat insulating container (1) is more difficult in terms of production than forming the protrusion portion (61), and it takes much time and effort to produce it.

[Problems to be solved by the device]

Therefore, an object of the invention of this application is to propose a heat-retaining container for cooked dishes, which does not take much labor for production.

[Means for Solving Problems]

In order to solve the above problems, the present invention takes the following technical means.

That is, a material having a certain degree of heat resistance is formed into a shape having a joining side (21) at the peripheral edge on the open end side.
A container having a hollow shell structure, wherein a heat storage agent (3) having a property of being hard to cool for a long time once heated is enclosed in the hollow portion, and the joint side (21) has a substantially peripheral edge. A strip-shaped projection (5) is provided along the circumference of the strip-shaped projection, and the strip-shaped projection (5) is divided into even-numbered portions. 5) to the joint side (2
1) on the outer circumference side (5a) and slightly on the inner circumference side (5a)
It was decided that they were arranged alternately with the one shifted in b).

Along the outer peripheral edge of the joint side (21), the elastic member (2
4) may be provided around.

The elastic member (25) may be provided on at least a part of the outer surface.

A heat insulating material may be interposed at least in part.

The heat storage material (3) may be filled in the hollow portion in a state of being enclosed in a cover.

The heat storage agent (3) may contain magnesium nitrate as a main component or sodium acetate as a main component.

[Action]

The heat-retaining container for cooked dishes using the above-mentioned means has the following actions.

First, two heat insulation containers according to the present invention are preheated by an appropriate heating method.

Then, the cooked food is stored in one of the heat insulating containers, and the other heat insulating container is covered with the heat insulating container on the side storing the cooked food in such a manner that the respective joining sides (21) are matched. Cover.

The cooked food stored in the space closed by the upper and lower heat insulation containers has the property of the heat storage agent (3) filled in the hollow part of the heat insulation container, that is, the heat retention effect due to the property that it is difficult to cool for a long time once heated. As in the case described above in the section of the prior art, it is possible to maintain a suitable temperature for a long period of time.

Further, the joint portion for ensuring the airtightness of the internal space when superposed is shifted to the outer peripheral side and slightly to the inner peripheral side by the strip-shaped projections (5) adjacent to each other on the joint side (21). Since the belt-like protrusions (5) are arranged alternately, the dent portion for engaging the concave and convex portions as in the prior art is unnecessary.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 to FIG. 6 show an embodiment of a heat-retaining container (1) for cooked dishes according to the present invention, which has a substantially circular dish shape and has a joint edge ( 21), a heat-insulating container (1) formed by sealing a heat storage agent (3) inside a stainless steel container (2) having a hollow shell structure, which is formed in a shape including 21), is stacked. It shows the state of being used.

As the heat storage agent (3), one containing magnesium nitrate or sodium acetate as a main component can be used.

This heat storage agent (3) has an excellent heat storage effect once it is heated due to the characteristics of the magnesium nitrate or sodium acetate,
It has the property of being hard to cool.

Here, magnesium nitrate as a main component of the heat storage agent (3) is adapted magnesium nitrate hexahydrate is mainly a chemical formula _{Mg (NO 3) 2 · 6H} 2 O, also, as well Sodium acetate, which is the main component of the heat storage agent (3), has sodium acetate trihydrate whose chemical formula is NaCH ₃ COO · 3H ₂ O as its main component.

The heat storage agent (3) is introduced through a hole (not shown) formed in a part of the container (2) and then filled in by a known method of welding the hole.

In addition, in this embodiment, the heat storage agent (3) is directly stored in the storage body (2) made of stainless metal.
In order to store the above, it is possible to fill the hollow portion in a state of being enclosed in an aluminum foil or a synthetic resin film (not shown) as a cover.

In this case, the heat storage agent (3)
Even if the inner surface of the aluminum foil is uniformly coated (not shown) with a resin that is not attacked by magnesium nitrate or sodium acetate (the main component of the heat storage agent), for example, nylon, polyethylene, etc. Good.

The shape of the container (1) can be appropriately selected according to the target food to be kept warm, the shape of the container (4) for cooking, and the like. For example, the outer periphery of the container (1) may be formed in an even-angled shape such as a quadrangle or an octagon as shown in FIG. 7 instead of the circular shape.

The upper and lower containers (1) do not necessarily have the same shape and size, but in actual use, the same shape and size are easier to use.

Further, when the upper and lower containers (1) are stored in a predetermined place after use, it is more convenient if they are formed in a known shape so that the open end side (11) can be stacked with the same direction. Become.

On the joint side (21) of the container (1), strip-shaped projections (5) are provided along the periphery of the open end side (11). The strip-shaped projections (5) are even-numbered locations, in this embodiment. It is divided into four parts, and the divided parts are appropriately omitted in length projections.

Further, the strip-shaped protrusions (5) adjacent to each other are connected to the joint side (2
The outer peripheral side in 1) and the one slightly shifted to the inner peripheral side are arranged alternately.

This is because, depending on the type of cooked food, there is a case where it is desired to provide a through hole from the overlapped internal space to the outside to allow water vapor and the like generated from the food to escape to the outside to prevent condensation inside. .

That is, when two containers (1) are overlapped with their open ends facing each other, as shown in FIG. 5, when the side ends (51) of the belt-like protrusions (5a) on the outer peripheral side are in contact with each other. (In FIGS. 5 and 6, the portion shown by the solid line is the lower heat-retaining container (1), the portion shown by the two-dot diagonal line is the strip-shaped projection of the upper heat-retaining container (1)), the internal space and the outside Can communicate only with a groove portion (portion indicated by an arrow) formed in the circumferential direction, and since this passage is long and narrow laterally, it is very difficult for air to flow therethrough, and a substantially sealed state can be formed.

Further, when the radial distance between the outer peripheral strip (5a) and the inner peripheral strip (5b) is made smaller, the air flow through the groove is practically eliminated.

On the contrary, as shown in FIG. 6, a strip-shaped protrusion (5a) on the outer peripheral side.
The upper and lower heat-retaining containers (1) are overlapped so that the radial positions of the belt-like protrusions (5b) on the inner peripheral side and the inner peripheral side of the container (1) are overlapped with each other from the gap (52) between the belt-like protrusions (5). It is also possible to allow free circulation of outside air.

Further, a hole (not shown) for removing water vapor may be opened outward from the space where the food is placed in the substantially central portion of the annular portion (22) of the container (1).

By doing so, the water vapor emitted from the food is discharged outward from this hole, and it becomes difficult for dew to condense in the container (1).

When the heat insulation container (1) is manufactured, it is usually press-molded, but if the joint portion (6) is formed only by the strip-shaped protrusions (5) as in the invention of this application, the protrusions (61) are formed as in the conventional case.
The joint (6) from the dent (62) with which it engages
There is an advantage that molding can be done very easily compared to the case of configuring.

Although the material of the container (1) is stainless steel in this embodiment, it is also possible to use a material having heat resistance to some extent, that is, about 100 ° C., for example, a molded product of synthetic resin. If a synthetic resin molded product is used, the common sense of the user is that the synthetic resin is vulnerable to high temperature when preheating the heat insulation container (1), so there is no risk of accidentally overheating by direct fire such as a gas stove. It is advantageous in terms.

The stainless steel housing (2) has a handle (23) formed by coating a stainless steel wire (23a) with a synthetic resin (23b) on an annular portion (22) protruding from the top of the housing. It is attached by the method. By coating the synthetic resin in this manner, it is advantageous that the heat storage agent (3) sealed in the heat insulation container (1) is not overheated by direct fire for the same reason as above.

Along the outer peripheral edge of the joint side (21), the elastic member (2
By surrounding the rubber / elastomer as 4), it becomes a shock absorbing material when the heat retaining container (1) is dropped.

Further, on the outer surface side of the container (1), another gap (not shown) is provided on the outer wall of the container (2) in addition to the gap in which the heat storage agent (3) is sealed, and a known heat insulation is provided in this gap. The material may be contained internally, and glass wool or the like can be used as the heat insulating material.

In this case, the heat of the heat storage agent (3) is exclusively released to the inner surface side, and the release to the outer surface side is suppressed to the minimum by the heat insulating effect of the heat insulating material, so that the heat retention efficiency is further improved.
Further, since heat is not easily transferred to the outer surface side, it becomes hot, and it is very easy to handle because the temperature is the same as normal temperature even if it is touched by hand.

An elastic member (25) formed of a known material having a low thermal conductivity is fitted to the bottom surface of the heat retaining container (1) in order to enhance the heat insulating effect on the contact surface with the table or the like.

Cooked dishes in which the heat-insulating containers (1) according to the present invention are stacked and placed in the space inside these heat-insulating containers (1) are
Due to the excellent heat storage effect of the heat storage agent (3), it is possible to maintain a warm state.

Therefore, cooked food for room service is put in the space of the container (1) that has been warmed with hot water, steam, warm air, electric heater, etc. in advance, and it is possible to carry it for a long time after carrying it to the customer's room.
Hard to cool.

There are some differences in the shape and capacity of the heat insulation container (1),
It takes about 15 to 30 minutes to soak this heat-retaining container (1) in boiling water and heat it to about 90 ° C., and then 3
The heat-retaining container (1) maintained about 70-80 degreeC when time passed.

[Effect of device]

The present invention has the above-mentioned configuration and does not require a dent portion for engagement due to unevenness as in the prior art, so that a cooked dish that can be relatively easily manufactured and does not require much labor for production You can raise the heat insulation container.

[Brief description of drawings]

FIG. 1 shows an embodiment of a heat retaining container for cooked dishes according to the invention of this application, a cross-sectional view of two heat retaining containers in contact with each other, and FIG. 2 shows the same heat retaining container as a whole. FIG. 3 is a perspective view, FIG. 3 is a front view of the heat insulation container shown in FIG.
FIG. 5 is an overall perspective view for explaining a state in which the heat insulation container shown in FIG. 2 is turned upside down, and FIG. 5 is a view in which two heat insulation containers according to the present invention are superposed so as to be almost hermetically sealed, and at a joint side thereof. FIG. 6 is a diagram for explaining the state of the band-like protrusions, FIG. 6 is a diagram for explaining the state of the band-like protrusions at the joint side of the heat-insulating container according to the present invention, which is superposed on the other two so as to have a through hole. (A) and (B) are front views explaining a heat retaining container of another shape, and FIG. 8 is a cross-sectional view illustrating a state where two conventional heat retaining containers are in contact with each other. (3) …… Heat storage agent, (5) …… Band-shaped projections, (5a) ……
Outer peripheral side, (5b) ... inner peripheral side, (21) ... joint side,
(24) ... elastic member, (25) ... elastic member

Claims (7)

[Scope of utility model registration request] 1. A container having a hollow shell structure, which is formed of a material having a certain degree of heat resistance in a shape having a joint side (21) at a peripheral edge on the open end side, wherein the hollow portion is The heat storage agent (3), which has a property of being hard to cool for a long time once heated, is enclosed, and the joint side (21) is provided with a strip-shaped protrusion (5) around substantially the periphery thereof, and the strip-shaped protrusion (5) is formed. The protrusions (5) are divided into even-numbered portions, and the divided portions are made to lack protrusions of an appropriate length. Furthermore, the strip-shaped protrusions (5) adjacent to each other are connected to the joint side (2).
1) on the outer circumference side (5a) and slightly on the inner circumference side (5a)
A heat-retaining container for cooked dishes, characterized by being arranged alternately with those shifted in b). 2. The heat retaining container for cooked dishes according to claim 1, wherein an elastic member (24) is provided along the outer peripheral edge of the joining side (21). 3. An elastic member (25) on at least a part of the outer surface.
The heat-retaining container for cooked dishes according to claim 1 or 2, characterized in that it is provided with. 4. A heat retaining container for cooked dishes according to claim 1, wherein a heat insulating material is interposed at least in part. 5. The heat retaining container for cooked dishes according to claim 1, wherein the heat storage material (3) is filled in the hollow portion in a state of being enclosed in a cover. 6. The heat insulation container for cooked dishes according to claim 1, wherein the heat storage agent (3) contains magnesium nitrate as a main component. 7. The heat retaining container for cooked dishes according to claim 1, wherein the heat storage agent (3) contains sodium acetate as a main component.