JP2002145356A - Tray-like heat-insulating double container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tray-like heat-insulating double container that retains sufficient heat-insulation properties and a shape to a moderate degree, by defining a heat insulating space 10 between an inner container 20 and a box 30 by a method in which the tray-like box 30, made of cardboard or corrugated paper, is positioned on the outside of the tray-like inner container 20, made of a relatively thin expanded polystyrene or unexpanded polystyrene, the tray- like heat insulating double container being used for, for example, instant pan- fried noodle that is cooked in such a manner that hot water is poured in the container, the noodle is left to stand, and then residual hot water is poured out of the container. SOLUTION: A bottom projection 22 in the shape of a disk, doughnut, etc., is formed on the outside of the middle of a bottom plate 21 of the inner container 20. A bottom plate 31 of the box 30 is stuck to the bottom projection of the bottom plate 21. At the same time, on upper outer surfaces of side plates 23 of the inner container 20, upper peripheral projections are defined in the form of tapes or broken lines. Upper peripheral portions of side plates 23 of the box 30 are stuck to the upper peripheral projections 24 of the side plates 23. Thus, the tray-like heat-insulating double container can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-foamed or non-foamed foam made of relatively thin styrofoam for instant noodles in which hot water is poured and left to eat and then the remaining hot water is discharged and cooked. A tray-shaped box made of paperboard or corrugated paper is placed outside the tray-shaped inner container made of polypropylene or the like, and a tray-shaped heat-insulating device that forms an insulating space between the inner container and the box is placed. Related to heavy containers.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, the thickness is 2.5 mm for an instant fried noodle, for example, for pouring hot water, leaving it to be eaten, and then discharging and cooking the remaining hot water. Flange 25 made of Styrofoam with excellent heat insulation
A tray-shaped container body 20 having rigidity attached thereto is covered with a plate-shaped lid body 40 provided with a locking convex groove 45 around the periphery thereof, and is wrapped with a transparent film (not shown). Tray-shaped insulated containers are generally widely used.

That is, the tray-shaped heat-insulating container is once opened and poured with hot water, and the flange 25 of the container 20 is locked with the locking convex groove 45 of the lid 40 to close the lid. After standing for 5 minutes, fingers are put on the bottom plate 21 and the side plates 23 of the container body 20 and the locking convex grooves 45 around the lid 40, and the container is tilted with the lid closed. Instant food such as fried noodles in a tray-like insulated container shown in FIG. 4 that can be drained from the groove and easily cooked with the attached seasoning or the like by opening the lid is generally widely used. It is distributed and sold.

[0004] This conventional tray-shaped insulated container shown in Fig. 4 is closed by pouring hot water and leaving it closed for 3 to 5 minutes so that the poured hot water does not cool down and remains closed. When the remaining hot water is discharged by tilting,
0 so that the fingers hung on the bottom plate 21 and the side plate 23 are not hot (the locking convex grooves 4 around the lid 40 not in contact with the hot water).
5 is not hot), and a sufficient heat insulating property is required for the tray-like container body 20 made of styrene foam.
In addition, when the remaining hot water is discharged by tilting while closing the lid, the container body 20 is distorted and the lid body 40 is disengaged, so that the hot water is not spilled and a burn-formed tray-shaped styrofoam is used. The container body 20 is required to have appropriate shape retention.

By the way, in the tray-shaped container body 20 shown in FIG. 4 made of polystyrene foam having a thickness of about 2.5 mm and having excellent heat insulating properties, hot water at 97 ° C. is poured and closed.
Bottom plate 21, side plate 23 of container body 20 when left for
Was 55 ° C. or less.

[0006]

In connection with the recent problem of waste disposal relating to the global environment (destruction of the ozone layer; foaming with CFC-based gas), FIG. The thickness of the rigid tray-shaped container body 20 is reduced from the conventional 2.5 mm to a relatively thin 1.7 m.
When the length is changed to about m, the rigid-shaped tray-shaped container body 20 made of styrene foam having excellent heat insulation shown in FIG. 4 is changed to a tray-shaped container body 20 made of non-foamed polypropylene. In this case, it is difficult to maintain the required sufficient heat insulation and moderate shape retention (rigidity), which is a problem.
When left for 5 minutes, the poured hot water cools down. Also, when the remaining hot water is discharged by tilting with the lid closed, the fingers hung on the bottom plate 21 and the side plate 23 of the container body 20 become hot. In addition, tilt it with the lid closed,
When the remaining hot water is discharged, the container 20 is distorted and the lid 4
There were many problems that had to be solved, such as the loss of 0 and the risk of hot water spilling and burns.

[0007] Incidentally, the thickness of the rigid tray-shaped container body 20 made of polystyrene foam having excellent heat insulation shown in Fig. 4 is reduced from the conventional 2.5 mm to a relatively thin 1.7 m.
m, the hot water of 97 ° C. is poured similarly, the lid is closed, and the bottom plate 2 of the container 20 is left for 3 minutes.
1. The surface temperature of the side plate 23 was 63 ° C. or higher.

Accordingly, an object of the present invention is to provide a tray made of relatively thin polystyrene foam or non-foamed polypropylene or the like for instant noodles in which hot water is poured and left, and the remaining hot water is discharged and cooked. A tray-shaped box 30 made of paperboard or corrugated cardboard is positioned outside the inner container 20 of FIG.
It is an object of the present invention to provide a tray-shaped insulated double container which can maintain a sufficient heat insulating property and a suitable shape-retaining property in which a zero is formed.

[0009]

As shown in FIGS. 1A, 1B, and 1C, a tray-shaped insulated double container of the present invention has a tray-shaped box positioned outside a plastic inner container. ,
An insulated double container in which an insulated space is formed between an inner container and a box body, wherein a bottom projection protruding outward is provided on a bottom plate of the inner container, and an upper outer surface side of a side plate of the inner container. A tray-shaped insulated double container characterized in that a circumferential convex portion is provided, and an upper peripheral portion of a side plate of a box is adhered to the convex portion.

In the tray-shaped insulated double container of the present invention, the bottom plate 21 of the inner container 20 is provided with a bottom projecting portion 22 protruding outward, and on the upper outer surface of the side plate 23 of the inner container 20,
By providing the convex part 24 in the circumferential direction and attaching the upper peripheral part of the side plate 33 of the box 30 to the convex part 24, as shown in FIG. 1A, the bottom plate 21 of the inner container 20 and the side plate Since a heat insulating space 10 having a gap of 2 to 4 mm, which will be described later, is formed between the bottom plate 23 and the bottom plate 31 and the side plate 33 of the box 30, a tray-shaped heat insulating member capable of maintaining sufficient heat insulating properties. Double containers can be provided.

In the tray-shaped insulated double container of the present invention, the bottom convex portion 22 of the bottom plate 21 of the inner container 20 and the box 3
The bottom plate 31 of the inner container 20 may or may not be adhered, but the upper peripheral portion of the side plate 33 of the box 30 is adhered to the circumferential projection 24 of the side plate 23 of the inner container 20. At the same time, by adhering the bottom plate 31 of the box 30 to the bottom convex portion 22 of the bottom plate 21 of the inner container 20, as shown in FIG. Since the tray-shaped box 30 is firmly fixed (shape-retained), a tray-shaped insulated double container capable of maintaining appropriate shape-retaining property (rigidity) can be provided.

The tray-shaped insulated double container of the present invention is provided on the upper outer surface side of the side plate 23 of the inner container 20 in the tray-shaped insulated double container shown in FIGS. 1A, 1B and 1C. , Tape-shaped or broken-line-shaped projections 2 provided in the circumferential direction
4, the side plate 2 of the inner container 20 as shown in FIG.
3 (the inclination angle of the bottom plates 21 and 31 with respect to the perpendicular (0 degree), the same applies hereinafter) is made larger than the inclination angle of the side plate 33 of the box 30, and the upper periphery of the side plate 23 is increased. In the department,
This is a tray-shaped insulated double container characterized by sticking the upper peripheral portion of the side plate 33 of the box 30.

In the tray-shaped insulated double container of the present invention, the bottom plate 21 of the inner container 20 is provided with a bottom convex portion 22 protruding outward, and the upper outer surface of the side plate 23 of the inner container 20 is provided. The inclination angle of the side plate 23 of the inner container 20 is made larger than the inclination angle of the side plate 33 of the box 30 in place of the circumferential projection 24 provided on the side plate 23. 2, the bottom plate 21, the lower side plate 23 of the inner container 20 and the bottom plate 31 of the box 30, the lower side Since a heat insulating space 10 having a gap of 2 to 4 mm, which will be described later, is formed between the inner plate 20 and the face plate 33, the inner container 20 has a rigid tray shape.
And the tray-shaped box 30 having rigidity is firmly fixed (shape-preserved), so that it has sufficient heat insulating properties similar to the tray-shaped insulated double container shown in FIGS. 1A, 1B, and 1C described above. A tray-shaped insulated double container capable of maintaining appropriate shape retention (rigidity) can be provided.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION In the tray-like insulated double container of the present invention, a heat insulating space 10 formed between an inner container 20 and a box 30 is provided with a bottom plate 21 and a side plate 23 of the inner container 20. The heat insulating space 10 in which the gap between the bottom plate 31 and the side plate 33 of the box 30 is 2 to 4 mm is appropriate.

That is, the gap between the bottom plate 21 and the side plate 23 of the inner container 20 and the bottom plate 31 and the side plate 33 of the box 30 is less than 2 mm. The rigid-shaped tray-shaped container body 20 shown in FIG. 4 made of styrene foam having excellent heat insulating property of about 2.5 mm is replaced with a rigid tray made of relatively thin styrene foam or non-foamed polypropylene. When it is changed to the inner container 20, it is difficult to maintain the required sufficient heat insulating property. Also, the bottom plate 21, the side plate 23 of the inner container 20 and the bottom plate 31, the side plate 3
In the heat insulating space 10 in which the gap between the inner space 3 and the inner space 3 exceeds 4 mm, even if the rigid tray-shaped inner container 20 and the rigid tray-shaped box 30 are firmly fixed (shape preservation), When the container is tilted with the lid closed and the remaining hot water is discharged, the container 30 (the inner container 20) may be distorted and the lid 40 may come off. The inventors of the tray-shaped insulated double container of the present application have learned through repeated trial and error that it is difficult to maintain the temperature.

A rigid tray-like inner container 20 is provided.
The heat-insulating space 10 was formed between the inner container 20 and the box 30 by positioning a tray-shaped box 30 having a step height of 1.2 mm or more and made of corrugated paper and having rigidity. In the case, the bottom plate 21, the side plate 23 of the inner container 20 and the box 30
Even if the gap between the bottom plate 31 and the side plate 33 is a heat insulating space 10 of less than 2 mm, sufficient heat insulation is maintained in combination with the heat insulation of corrugated paper having a step height of 1.2 mm or more. can do.

[0017]

<Embodiment 1> FIG. 1A is a cross-sectional view of a tray-shaped insulated double container according to Embodiment 1 of the present invention, and FIGS. It is a perspective view of the inner container 20 and the box 30 in an insulated double container. FIG. 3 is a plan view of a blank of the box 30 in the tray-shaped insulated double container of the first embodiment.

That is, a disc-shaped bottom protrusion 22 having a diameter of 5 cm and a height of 2.5 mm is provided on the outer side of the center of the bottom plate 21 of the inner container 20. On the outer side of the upper part, 1cm wide tape-shaped, 2.0m high
Bottom plate 21 made of styrene foam having a relatively thin thickness of about 1.7 mm and provided with flanges 25 provided with tapping grooves 26, 26 at two opposing corners.
FIG. 1A, which is 10 × 13 cm in length and width and 5 cm in height.
A tray-shaped inner container 20 having the rigidity shown in B was produced by ordinary sheet molding.

Next, 270 g of beautiful printed on the outer surface side
/ M2 kraft cardboard, and trapezoidal front, rear, left and right side plates 33, 3
3, 33, 33 are successively provided via fold lines (one-dot chain lines without reference numerals, the same applies hereinafter), and glue margin pieces 35 of appropriate shapes are attached to the oblique sides before and after the left and right side plates 33, 33. , 3
After the blanks of the box body 30 shown in FIG. 3 in which 5, 35, and 35 are continuously provided via the fold line are produced by a punching process using a normal punching die, the front and rear side plates 33, 3 are formed.
3A and 3B, glue margins 35, 35, 35, 35 are adhered to the left and right oblique sides of FIG. The tray-shaped box 30 having the rigidity shown in FIG. 1 was produced by a box-making process using a normal adhesive.

Subsequently, a 270 g / m 2 kraft ball is placed outside the rigid inner tray 20 shown in FIGS. 1A and 1B made of styrene foam having a relatively thin heat insulating property of about 1.7 mm. 1A and 1C made of paper
The tray-shaped box 30 having rigidity shown in FIG.
In mechanical box making and filling process using hot melt etc.
The bottom plate 31 of the box 30 is attached to the bottom protrusion 22 of the bottom plate 21 of the inner container 20, and at the same time, the top plate 24 of the side plate 23 of the inner container 20 is 12 not shown with the peripheral part attached and a bagged source attached.
After storing 0 g of instant noodles, a flat lid 4 made of ordinary polypropylene and provided with locking projections 45 around the periphery.
0 and wrapped with a transparent film (not shown) to produce a tray-like insulated double container shown in FIGS. 1A, 1B, and 1C in Example 1 of the present invention.

That is, the tray-shaped insulated double container is once opened, and hot water is poured into the tray.
The locking convex groove 45 of the lid body 40 is locked and the lid is closed.
After leaving for 30 minutes, the bottom plate 31, the side plate 33 of the box 30
A finger is hung on the locking convex groove 45 around the lid 40 and the lid is inclined with the lid closed, and the remaining hot water is discharged from the tapping groove 26 provided in the flange 25 of the inner container 20 to open. An instant yakisoba was obtained in a tray-shaped insulated double container shown in FIGS. 1A, 1B, and 1C, which can be easily cooked with a sauce or the like attached with a lid.

FIG. 1A, FIG.
In the case of the tray-shaped insulated double container shown in FIG.
A bottom plate 22 having a diameter of 5 cm and a height of 2.5 mm is provided on the center outer surface side of the bottom plate 21 of FIG. At the same time, a convex portion 24 having a width of 1 cm and a height of 2.0 mm is provided on the upper outer surface side of the side plate 23 of the inner container 20 by attaching the face plate 31. 24, the upper peripheral portion of the side plate 33 of the box 30 is adhered, so that the bottom plate 21, the side plate 23 of the inner container 20 and the box 30 as shown in FIG.
2.5m gap between bottom plate 31 and side plate 33
m, 2.0 mm insulated space 10 is formed, pouring hot water and closing the lid. When left for 3 to 5 minutes, make sure that the poured hot water does not cool down. ,
When the remaining hot water is discharged, the fingers hung on the bottom plate 31 and the side plate 33 of the box 30 are not hot (the locking convex grooves 45 around the lid 40 not in contact with the hot water are not hot). As a result, a tray-shaped insulated double container capable of maintaining sufficient heat insulating properties was obtained.

In Embodiment 1 of the present invention, FIGS.
In the tray-shaped insulated double containers shown in B and C, the bottom plate 31 of the box 30 is adhered to the bottom convex portion 22 of the bottom plate 21 of the inner container 20, and at the same time, the side plate 23 of the inner container 20 is attached. 1A, the upper peripheral portion of the side plate 33 of the box 30 is adhered to the convex portion 24 of the container 30. As shown in FIG. 1A, the tray inner container 20 having rigidity and the tray container 30 having rigidity are provided. And
In order to firmly fix (retain shape), the container is inclined with the lid closed, and when the remaining hot water is discharged, the box 30 (inner container 20) is distorted and the lid 40 comes off, and the hot water spills and burns. Thus, a tray-shaped insulated double container capable of maintaining an appropriate shape-retaining property (rigidity) so as not to perform the process can be obtained.

Incidentally, a 270 g / m 2 kraft cardboard made of 270 g / m 2 of kraft cardboard is provided on the outside of the tray-shaped inner container 20 shown in FIGS. 1A and 1B made of styrene foam having a relatively thin heat insulating property of about 1.7 mm. Tray-shaped box 3 shown in C
0, the bottom plate 21 and the side plate 23 of the inner container 20
In the tray-shaped insulated double container of Example 1 in which the heat insulating space 10 with a gap of 2.5 mm and 2.0 mm was formed between the bottom plate 31 and the side plate 33 of the box 30 and 97 ° C. Of the bottom plate 31 and the side plate 33 of the box 30 when the hot water was poured, closed, and left for 3 minutes was 52 ° C. or less.

<Embodiment 2> FIG. 2 is an explanatory sectional view of a tray-shaped insulated double container in Embodiment 2 of the present invention.
FIG. 3 is a plan view of a blank of the box 30 in the tray-shaped insulated double container of the second embodiment.

That is, a disk-shaped bottom protrusion 22 having a diameter of 5 cm and a height of 3.5 mm is provided on the outer side of the center of the bottom plate 21 of the inner container 20. The inclination angle (with respect to the perpendicular (0 degree) of the bottom plate 21)
Flange 25 made of non-foamed polypropylene having a thickness of about 0.6 mm and having tapping grooves 26, 26 at two opposing corners, the inclination angle of side plate 33 of box 30 being 12 degrees larger than 9 degrees. The length and width of the bottom plate 21 are 10 × 13
A tray-shaped inner container 20 having a rigidity shown in FIG. 2 and having a height of 5 cm and a height of 5 cm was produced by a usual sheet forming method.

Next, 400 g of beautiful printed on the outer surface side
/ M2 kraft cardboard, and trapezoidal front / rear and left / right side plates 33, 33, 33, 33 are respectively placed on the four sides of the rectangular bottom plate 31 via fold lines in the same manner as in the first embodiment. And glue margin pieces 35, 35, 35, 35 having appropriate shapes are attached to the oblique sides in front of and behind the left and right side plates 33, 33.
After the blanks of the box 30 shown in FIG. 3 were continuously formed through the fold lines in a punching process using a normal punching die, the blanks were formed on the left and right oblique sides of the front and rear side plates 33, 33. 2, except that the glue margin pieces 35, 35, 35, 35 are attached and the inclination angle of the side plate 33 is 9 degrees, and is substantially the same as that of the rigid inner tray 20 shown in FIG. Figure 2
The tray-shaped box 30 having the rigidity shown in FIG. 1 was produced by a box-making process using a normal adhesive.

Subsequently, the above-mentioned non-foamed thickness of 0.1 mm.
A side plate 33 made of kraft cardboard of 400 g / m 2 is placed on the outside of a rigid tray-shaped inner container 20 shown in FIG. With the inclination angle of 9 degrees, a tray-shaped box body 30 having rigidity as shown in FIG. 2 is positioned, and similarly to the first embodiment, a mechanical box making using hot melt or the like, The bottom plate 31 of the box 30 is attached to the bottom projection 22 of the bottom plate 21 of the inner container 20, and at the same time, the side plate 3 of the box 30 is
3. Attach the upper periphery and attach a bag-packed sauce, etc.
After accommodating 120 g of instant fried noodles (not shown), cover the flat lid 40 made of ordinary polypropylene and provided with the locking convex groove 45 around it, and wrap it with a transparent film (not shown). In Example 2 of the present invention, a tray-shaped insulated double container shown in FIG. 2 was produced.

In the tray-shaped insulated double container shown in FIG. 2 according to the second embodiment of the present invention, a disk having a diameter of 5 cm and a height of 3 cm is provided on the center outer surface of the bottom plate 21 of the inner container 20. A bottom plate 22 of 0.5 mm is provided, and a bottom plate 31 of a box 30 is adhered to the bottom protrusion 22 of the bottom plate 21. As shown in FIG. 2, the inclination angle of the side plate 33 of the container 30 is set to 12 degrees, which is larger than 9 degrees, and the upper periphery of the side plate 33 of the box body 30 is attached to the upper periphery of the side plate 23. And inner container 20
Bottom plate 21, lower side plate 23 and bottom plate 3 of box 30
1, the gap between the lower side plate 33 and 3.5 mm,
In order to form the heat insulating space 10 of 3.0 mm, and to firmly fix (retain the shape) the rigid tray-shaped inner container 20 and the rigid tray-shaped box 30, the hot water is supplied. When poured and closed and left for 3-5 minutes,
The bottom plate 3 of the box 30 is used to prevent the poured hot water from cooling down and to tilt it with the lid closed to discharge the remaining hot water.
1. The box 30 (the inner container 20) is distorted and the lid 40 comes off when the remaining hot water is discharged so that the fingers hung on the side plate 33 are not hot, and the remaining hot water is discharged while the lid is closed and inclined. A tray capable of maintaining sufficient heat insulation and moderate shape retention (rigidity) similar to the tray-shaped insulated double container of Example 1 so that hot water does not spill and cause burns. A heat-insulated double container was obtained.

By the way, unfoamed thickness 0.6mm
The tray-shaped box 30 made of kraft cardboard of 400 g / m 2 shown in FIG. 2 is positioned outside the tray-shaped inner container 20 shown in FIG. There is a gap of 3.5 between the face plate 21, the lower side plate 23 and the bottom plate 31 of the box 30 and the lower side plate 33.
Example 2 in which a heat insulating space 10 of 3.0 mm and 3.0 mm was formed.
In the case of the tray-shaped insulated double container, the surface temperature of the bottom plate 31 and the lower side plate 33 of the box 30 when pouring hot water of 97 ° C. and closing the lid for 3 minutes is 56 ° C. or less. Met.

[0031]

As described above, in the tray-like insulated double container of the present invention, as shown in the examples and the like, it is used for instant fried noodles in which boiling water is poured and left, and the remaining boiling water is discharged and cooked. A paper tray-shaped box 30 is positioned outside the relatively thin plastic inner container 20, and the inner container 2 is placed.
Insulated space 10 is formed between 0 and box 30. When pouring hot water and closing the lid, leave it for 3 to 5 minutes so that the poured hot water does not cool down and tilt it with the lid closed. When the remaining hot water is discharged, the fingers hung on the bottom plate 31 and the side plate 33 of the box 30 are not heated. Tray-shaped heat insulation that can maintain sufficient heat insulation and moderate shape retention so that the lid 30 does not come off due to distortion of the inner container 30 (inner container 20) and hot water does not spill and burn. Double containers can be provided.

[Brief description of the drawings]

FIG. 1A is an explanatory cross-sectional view of a tray-shaped insulated double container in Example 1 of the present invention.
C is a perspective view of the inner container 20 and the box 30 in the tray-shaped insulated double container of Example 1. FIG.

FIG. 2 is an explanatory cross-sectional view of a tray-shaped insulated double container according to a second embodiment of the present invention.

FIG. 3 is a plan view of a blank of a box body 30 in the tray-shaped insulated double containers of the first and second embodiments.

FIG. 4 is an explanatory sectional view of a conventional tray-shaped heat insulating container.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Heat insulation space 20 ... Inner container, container body 21, 31 ... Bottom plate 22 ... Bottom convex part 23, 33 ... Side plate 24 ... Upper peripheral convex part 25 ... Flange 26 ... Hot water supply groove 30 ... Box body 35 ... Adhesive margin piece 40 … Lid 45… Locking convex groove

Claims (2)

[Claims] 1. An insulated double container having a tray-shaped box positioned outside a plastic inner container to form an insulated space between the inner container and the box. On the face plate,
It is characterized in that a bottom convex portion protruding outward is provided, a circumferential convex portion is provided on the upper outer surface side of the side plate of the inner container, and an upper peripheral portion of the side plate of the box is attached to the convex portion. And a tray-shaped insulated double container. 2. The tray-shaped insulated double container according to claim 1, wherein the side plate of the inner container is inclined on the upper outer surface side of the side plate of the inner container instead of the convex portion provided in the circumferential direction. The angle,
A tray-shaped insulated double container, wherein the upper peripheral portion of the side plate of the box is adhered to the upper peripheral portion of the side plate at an angle larger than the inclination angle of the side plate of the box.