JPH09240755A - Heat insulating box made of paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a high heat insulating property by suppressing the flowing of air in a space between an external box and an internal frame body, and in addition, improve the assembling property by forming a member being fitted in the external box into a frame structure to reduce the cost. SOLUTION: A first side plate 9 wherein a first standing plate 9a comprising of a width which is not more than the height of an external box 3, a first flat surface plate 9b being extended with a width which approx. meets a gap to be formed between side plates of the external box, and a first vertically hanging plate 9c which vertically hangs down along the internal surface of the side plate of the external box are provided, is integrally formed. An internal frame body 5 is formed by integrally forming a second side plate 11 wherein a second flat surface plate 11b with a width which approx. meets the gap to be formed between the side plates of the external box, a second vertically hanging plate which vertically hangs down along the internal surface of the side plate of the external box, and closing plates to close openings at both end edges, are provided. When the internal frame body is fitted in the external box, spaces with widths which approx. meet the first and second flat surface plates, are respectively formed, and at the same time, openings at both ends of the spaces are closed by the closing plates.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper insulation box.

[0002]

As a conventional heat insulating box, a styrene foam synthetic resin box is generally used. However, while this synthetic resin box is excellent in heat insulating property, it is a large amount of synthetic resin raw material. However, there is a problem in that it consumes labor and costs after disposing of the petroleum resources.

In order to solve the above-mentioned drawbacks, the applicant of the present invention has disclosed, for example, in Japanese Unexamined Patent Publication No. 8-11864, a paper-made outer box having a pair of first and second side plates facing each other with a bottom, and the outer box. A third side plate erected on one of the opposite side edges of the bottom plate having a size that can be inserted into the box, a fourth side plate erected on the other opposing side plate, a third side plate, and a third side plate. Four
A corner plate integrally provided at the end of the side plate and having a fold in a diagonal position, a top plate and a drooping plate provided at the upper part of the third side plate, and an outer side with respect to each end of the top plate and the drooping plate Has a projecting portion integrally formed so as to project with a predetermined width, and folds each corner plate at the folds to lay up the third and fourth side plates with respect to the bottom plate while superimposing them in a substantially triangular shape. After that, when the inner box is inserted into the outer box, it consists of a paper inner box formed by folding the top plate into a substantially flat shape at the top of the third side plate and folding the hanging plate downward. A paper heat insulation box was proposed in which a gap can be formed by a top plate located between the first side plate and the third side plate and a protrusion located between the second side plate and the fourth side plate. In the paper-made heat-insulating box having the structure, it is formed by each side plate of the outer box and each side plate of the inner box which is fitted into the outer box and faces each other. Because the gas layer is a flowable, thermal insulation was not enough.

The present invention has been invented in order to solve the above-mentioned conventional drawbacks, and its object is to suppress the flow of air between the outer box and the inner frame to obtain a high heat insulating property. It is to provide a heat-insulating paper box that can be obtained.

Another object of the present invention is to provide a heat insulation box made of paper, which has a frame structure as a member to be inserted into the outer box, which can improve the assemblability and can reduce the cost. It is in.

[0006]

Therefore, according to the present invention, at least an outer box having a bottomed shape and made of a paper material, and a paper material of the same kind or different kind as the outer box, and having a size smaller than the bottom surface of the outer box. A first standing plate having a width equal to or smaller than the height of the outer box at one of the opposite side edges of the bottom plate, and substantially the same as the gap to be formed between the side plates of the outer box at the upper edge of the first standing plate. The first side plate extending along the inner surface of the side plate of the outer box at the end edge of the first flat plate extending in the width At the other side edge, between the both end portions of the first side plate, a second standing plate having a height corresponding to that of the first standing plate, and at the upper end edge of the second standing plate, is to be formed between the side plates of the outer box. A second flat plate having a width substantially equal to the gap formed by the second flat plate, and a second flat plate hanging along the inner surface of the side plate of the outer box at the edge of the second flat plate. The lower plate and the second hanging plate are integrally formed with a second side plate having bendable closing plates for closing the openings at both end edges at both ends of the lower plate and the second hanging plate. Make a heat insulation box. Then, when the inner frame body in which the first side plate and the second side plate located between both ends of the first side plate are bent downward in a U-shape is inserted into the outer box, the first frame is inserted between the respective side plates in the outer box. Space portions having widths substantially equal to those of the first and second plane plates are formed, respectively, to obtain a heat insulating effect. At this time, the second
Closing both end openings of the space in the side plate with the closing plate,
It suppresses the inflow and outflow of air and maintains the heat insulation effect.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view of a paper insulation box.

FIG. 2 is a development view of the inner frame body.

FIG. 3 is a longitudinal sectional view of the paper heat insulating box corresponding to the line III-III in FIG.

FIG. 4 is a partial perspective view showing an assembled state of the inner frame body.

The heat insulation box 1 made of paper is composed of an outer box 3 and an inner frame body 5 inserted into the outer box 3. The outer box 3 and the inner frame body 5 are made of thick paperboard or corrugated cardboard. It is made of paper material. The paper material of the outer box 3 and the inner frame body 5 may be a non-waterproof material or a waterproof material in which at least one of the inner surface and the outer surface or a middle layer is coated with a synthetic resin such as polypropylene resin or polyethylene resin. Good.

The outer box 3 has a box structure in which the bottom plates 3c and 3d are superposed on the lower ends of the opposite side plates 3a and 3b, or each corner plate (not shown) of a substantially rectangular paper material is formed. Any conventionally known box structure may be used, such as a box structure in which side plates (not shown) that face each other are erected by folding them back in a triangular shape and stacking them, and the bottom surface is not cut.

The outer box 3 shown in the figure is one in which the lid pieces 3e and 3f are formed integrally on the upper ends of the side plates 3a and 3b so as to be bendable, but the present invention does not include the lid pieces 3e and 3f. It may be 3. In this case, the upper opening of the outer box 3 may be closed by a box-shaped lid that can be fitted into the upper part of the outer box 3.

The inner frame body 5 has a structure in which the first side plate 9 and the second side plate 11 can be erected at the folds 13 and 15 at the upper and lower edges and the left and right edges of the bottom plate 7 in the unfolded state. That is, a first standing plate 9a having a size facing the side plate 3a is integrally formed at the upper and lower edges of the bottom plate 7 so as to be bendable by the fold line 13, and the side plate 3a is formed at the edge of the first standing plate 9a. A first flat plate 9b having a width substantially matching the space 30 to be provided therebetween is integrally formed so as to be bendable at the fold line 17.
Further, a first hanging plate 9c having a size substantially equal to that of the first standing plate 9a is integrally formed on the edge of the first flat plate 9b so as to be bendable at a fold line 19, and the first side plate 9 is longitudinally cut. The first upright plate 9a, the first flat plate 9b, and the first hanging plate 9c are bent so that the surfaces thereof face downward.

Further, at the left and right edges of the bottom plate 7 shown in the drawing, the second side plate 11 is provided at a position where cuts 21a and 21b having a length substantially corresponding to the thickness of the second side plate 11 are formed from each end of the first standing plate 9a.
Are integrally formed so that they can stand. That is, the second upright plates 11a having a size opposite to the side plates 3b are integrally formed on the left and right edges of the bottom plate 7 so as to be bendable at the folds 15.
At the edge of 1a, a fold 23 is provided with a second flat surface portion 11b having a width substantially matching the space portion 31 to be formed between the side plate 3b and the side plate 3b.
It is integrally formed so that it can be bent. A second hanging plate 11c having the same size as the second standing plate 11a is integrally formed at the edge of each second flat surface portion 11b so as to be bendable at the fold line 25. Further, a closing plate 11d having a thickness substantially equal to that of the second side plate 11 is integrally formed at both ends of the second hanging plate 11c so as to be bent inward at a fold 27, and is folded back at the tip of the closing plate 11d. The piece 11e is integrally formed so as to be bendable at the fold line 29.

The inner frame body 5 is bent as follows and assembled into a frame shape. That is, first, the first and second edges of the bottom plate 7
After the standing plate 9a is bent at the fold 13 to stand up, the first plane plate 9b is bent horizontally at the fold 17 and the first hanging plate 9c is bent at the fold 19. The first,
It is formed on the first side plate 9 having a space portion 30 between the plane plate 9b and the first hanging plate 9c, which has a width substantially equal to the width of the first plane plate 9b. Further, in the above state, the second standing plate 1 is attached to the left and right edges of the bottom plate 7.
Fold 1a along fold line 15 to stand it up, and then fold line 2
At 3, the second flat surface portion 11b is bent in the horizontal direction, and at the fold line 25, the second hanging plate 11c is bent and hung.
At this time, the closing plate 11d is provided at both ends of the second hanging plate 11c.
Is bent at the fold 27 and the folded piece 11e is bent at the fold 29 so that the closing plate 11d is positioned between both ends of the second standing plate 11a and the second hanging plate 11c. Second
The openings at both ends of the space 31 formed between the hanging plates 11c are closed.

When the second side plate 11 is erected on the left and right edges of the bottom plate 7 as described above, the second side plate 11 is located inside from the left and right ends of the first upright plate 9a by the thickness thereof. Since it stands upright, it is positioned between both ends of the first side plate 9.

Next, the inner frame body 5 assembled as described above.
Is inserted into the outer box 3 to assemble the paper heat insulating box 1. At this time, by disposing a plurality of insole boards 33 such as cardboard or corrugated paper on the bottom surface of the outer box 3, heat insulation at the bottom surface of the outer box 3 can be ensured. In addition, since the space portions 30 and 31 formed by the first side plate 9 and the second side plate 11 are formed between the side plates 3a and 3b of the outer box 3 and the inner frame body 5, the heat insulating property on the side surface of the outer box 3 is improved. Can be secured.

The space portion 30 of the first side plate 9 is a side plate 3b which comes into contact with both end surfaces when the inner frame body 5 is inserted into the outer box 3.
Therefore, the space 31 of the second side plate 11 is closed by the closing plate 11d.
Since they are respectively closed by, the air in the space portions 30 and 31 is suppressed from flowing in and out, and a heat insulating effect is obtained.

Then, after the required product is accommodated in the inner frame body 5 inserted into the outer box 3, the first side plate 9 in the inner frame body 5 is placed.
Also, with the insole plate (not shown) made of corrugated paper of a desired thickness placed on the upper surface of the second side plate 11, the lid pieces 3e and 3f are folded back and the tip portions are superposed on each other. The top opening of the box 3 is closed.

As a result, the space portion 30 and the second portion of the first side plate 9 formed between the inner frame 5 in which the product is housed and the outer box 3 are formed.
The space portion 31 of the side plate 11 heat-insulates the inside of the inner frame body 5, reduces heat radiation from the inside of the inner frame body 5 and heat transfer from the outside, and can thermally accommodate the product. At the time of stacking and stacking, the weight of the plurality of stacked paper thermal insulation boxes 1 acting on the lower paper thermal insulation box 1 causes the first standing plate 9a to be curved so that a gap is formed between both end surfaces of the second side plate 11. There are things you can do.
In this case, the space portion 3 in the second side plate 11
Since both end openings of 1 are closed by the closing plates 11d, it is possible to suppress the inflow and outflow of air in the space 31 and maintain the heat insulating effect.

(1) In the above description, the closing plate 11d and the folded piece 11e are integrally formed in a bendable manner at both ends of the second hanging plate 11c of the second side plate 11, and the space 31 in the second side plate 11 is closed. However, as shown in FIG. 5, the closing plate 9e and the folding piece 9d are integrally formed so as to be bent at both ends of the first hanging plate 9c of the first side plate 9, and the space in the first side plate 9 is formed by the closing plate 9e. The configuration may be such that the part 30 is closed. In such a configuration, when a large number of paper heat insulation boxes 1 containing products are stacked, the paper heat insulation in which the side plates 3b of the outer box 3 of the paper heat insulation box 1 located below are stacked. Box 1
Even if it is curved due to the weight of the first side plate 9, it is possible to maintain the closed state of the space portion 30 in the first side plate 9 and suppress the inflow and outflow of air to maintain the heat insulating effect.

(2) In the above description, when the inner frame body 5 is inserted into the outer box 3, the insole plate 33 is provided between the bottom surface of the outer box 3 and the bottom plate 7 of the inner frame body 5 to provide the outer frame. Although the heat insulating property from the bottom surface of the box 3 is ensured, in the case of containing a lightweight product, as shown in FIG. 6, the first hanging plate 9c of the first side plate 9 and the second hanging plate 9c 2 hanging plate 11c to the first and second upright plate 9a
It may be made longer than the height of 11a, and when the inner frame body 5 is inserted into the outer box 3, a space portion 37 may be provided between both bottom surfaces of the outer box 3 and the inner frame body 5 to obtain a heat insulating effect. . In addition, as a structure in which the space portion 37 is provided between the bottom surface of the outer box 3 and the bottom plate 7 of the inner frame body 5 as described above, one of the first and second hanging plates 9c and 11c is used as described above. , First and second upright plates 9a
-It may be longer than 11a.

(3) The weight of the paper heat insulating box 1 in which the first standing plates 9a of the inner frame 5 in the paper heat insulating box 1 located below are stacked when the paper heat insulating boxes 1 are stacked in multiple stages. As shown in FIG. 7, the first upright plate 9
A support piece 9 having a width substantially equal to that of the first flat plate 9b at both ends of a
The upper surface of the first flat plate 9b is formed by bending f so that the upper end of the support piece 9f abuts the lower surface of the first flat plate 9b when the first side plate 9 is folded downward in a U shape. The force acting on can be accepted. In this case, the height width of the first hanging plate 9c may be shorter than that of the first standing plate 9a. Also, the first upright plate 9a is used as the support piece 9f.
The width may not be the entire width above and below, and may be the shape shown by the broken line in FIG. 7, for example.

[0026]

As described above, according to the present invention, it is possible to suppress the flow of air between the outer box and the inner frame to obtain high heat insulation. Further, according to the present invention, the member to be inserted into the outer box has a frame structure, so that the assemblability thereof can be improved and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a paper insulation box.

FIG. 2 is a development view of an inner frame body.

FIG. 3 is a vertical cross-sectional view of the paper heat insulation box corresponding to the line III-III in FIG.

FIG. 4 is a partial perspective view showing an assembled state of the inner frame body.

FIG. 5 is a partial perspective view showing a modified embodiment.

FIG. 6 is a vertical sectional view showing a modified embodiment.

FIG. 7 is a partial perspective view showing a modified embodiment.

[Explanation of symbols]

1: Heat insulation box made of paper 3: Outer box 5: Inner frame 9: First side plate 9a: First standing plate 9b First flat plate 9c: First hanging plate 11: Second side plate 11a: Second standing plate 11b:
2nd plane board 11c: 2nd hanging board 11d: Closing board 3
0.31: Space

Claims (7)

[Claims] 1. An outer box at least having a bottomed shape and made of a paper material, and a paper material of the same kind or different kind as the outer box, and at one side edge of a bottom plate having a size smaller than the bottom surface of the outer box. A first upright plate having a width equal to or less than the height of the outer box;
A first flat plate extending at a width substantially matching the gap to be formed between the side plates of the outer box at the upper edge of the standing plate and the edge of the first flat plate hanging along the inner surface of the side plate of the outer box. A first side plate formed by bending the first hanging plate is integrally formed, and a second side plate having a height corresponding to that of the first standing plate is formed at the other side edge of the bottom plate between both ends of the first side plate. Standing plate, a second flat plate having a width substantially matching the gap to be formed between the side plates of the outer box at the upper edge of the second standing plate, along the inner surface of the side plate of the outer box at the edge of the second flat plate The second side plate that is provided with the second hanging plate that hangs down and the closing plate that closes the openings at both ends at both ends of the second hanging plate so as to be bendable are integrally formed, and the second side plate that can be inserted into the outer box is formed. A frame body and a first side plate and a second side plate located between both ends of the first side plate are bent in a downward U shape and inserted into the outer box. Insulation made of paper in which a space portion having a width substantially equal to that of the first and second plane plates is formed between each side plate of the outer box and both ends of the space portion of the second side plate can be closed by closing plates. box. 2. The paper heat insulation box according to claim 1, wherein a closing plate is provided at both ends of either the first upright plate or the first hanging plate of the first side plate so as to be bendable. 3. The inner frame body according to claim 1, wherein at least one of the first hanging plate and the second hanging plate is made longer than the height width of the first and second upright plates, and the inner frame is inserted into the outer box. In this case, a paper heat insulation box that can form a space between the bottom of the outer box and the bottom of the inner frame that has a width that approximately matches the height difference between the hanging plate and the upright plate. 4. The heat insulation box made of paper according to claim 1, wherein a support plate abutting against the inner surface of the first flat plate whose upper portion is bent is provided at least at the upper part of both edges of the first standing plate so as to be bendable. 5. The heat insulating box made of paper according to claim 1, wherein the paper material forming the outer box and the inner frame is a paperboard having a required thickness. 6. The heat insulating box made of paper according to claim 1, wherein the paper material forming the outer box and the inner frame is a corrugated cardboard paper having a required thickness. 7. The heat insulation box made of paper according to claim 5, wherein at least one surface of the paper material is coated with a synthetic resin layer.