JP2003040257A - Heat-insulating box made of paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat-insulating box made of paper, which has a high efficiency of containing a product while maintaining a heat-insulating effect. SOLUTION: An outer box 3 of the heat-insulating box is composed of a pair of first side sheets 9 opposed to each other, each erecting from a longer side edge of a bottom sheet and having a first top surface sheet 23 extending at an upper part of the first side sheet 9 and a first suspension sheet 27 suspending from the first top surface sheet 23, a pair of second side sheets 13 opposed to each other, each erecting from a shorter side edge of the bottom sheet and having a second top surface sheet 31 extending at an upper part of the second side sheet 13 and a second suspension sheet 35 suspending from the second top surface sheet 31, and corner sheets 17 for connecting both ends of the first and second side sheets to one another. After triangularly folding the corner sheets back to erect the first and second side sheets with respect to the bottom sheet, the first and second top surface sheets are folded back in a plane manner, and an upper interval between the first side sheets is made narrower than a lower interval therebetween to assemble the first side sheets so as to be formed into a trapezoidal shape when viewed from the side of the second side sheets. In an inner box 15 of the heat-insulating box, third side sheets 45, which are butted to each other to form a bottom sheet for closing a bottom surface at their lower portions, and fourth side sheets 47, which form bottom sheet pieces at their lower portions, are erected along the first and second suspension sheets, and a gap to be produced by the trapezoidal shape is made definable between each first side sheet and each third side sheet, respectively.

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]

The present applicant has proposed a paper heat insulation box in, for example, Japanese Patent Application No. 80-80594. The paper insulation box is an outer box at least having a bottom shape and made of a paper material, and one side edge of a bottom plate having a size smaller than the bottom surface of the outer box and made of a paper material of the same or different type as the outer box. A first upright plate having a width equal to or smaller than the height of the outer box, and a first flat plate extending at a width substantially corresponding to a gap to be formed between the side plates of the outer box at an upper edge of the first upright plate. A first side plate is provided integrally with the face plate and the first flat plate so as to be bendable, and a first hanging plate that is bent along the inner surface of the side plate of the outer box is integrally formed at the other side edge of the bottom plate. A second upright plate located between the ends of the second upright plate and having a height matching the first upright plate,
A second flat plate having a width substantially equal to the gap to be formed between the side plates of the outer box at the upper edge of the second standing plate, and hangs along the inner surface of the side plate of the outer box at the edge of the second flat plate. An inner frame body that is integrally formed with a second hanging plate and a second side plate that is bendably provided with closing plates that close the openings at both ends at both ends of the second hanging plate When the first side plate and the second side plate located between both end portions of the first side plate are inserted into the outer box in a state of being bent in a downward U shape, the first side plate and the second side plate are provided between the first side plate and each side plate of the outer box. And a space portion having a width substantially equal to that of the second flat plate, and both end openings of the space portion of the second side plate can be closed by closing plates.

In this paper heat insulation box, a flat plate and a hanging plate are provided on the upper side plates of an inner box to be fitted into the outer box, and an air layer as a heat insulation layer is formed between the side plates facing each other of the outer box. But
There is a problem that the accommodation volume of the inner box is smaller than the volume of the entire heat insulation box, and the product volume that can be accommodated is reduced.

The present invention has been invented in order to solve the above-mentioned conventional drawbacks, and its object is to reduce the volume that can be accommodated in the product relative to the volume of the outer box while maintaining the heat insulating effect. It is to provide a paper heat insulation box that can be avoided to increase the storage efficiency.

[0005]

According to the present invention, there is provided a paper heat insulation box in which an inner box made of a paper material which is the same as or different from the outer box is inserted into an outer box made of a paper material. Of the bottom plate and the pair of first side plates facing each other having the first top plate that stands up from the long side edge and extends inward with a predetermined width in the upper part, and the first hanging plate that hangs from the first top plate; A pair of opposing members that stand up from the short side edges, have an upper width shorter than the lower width, and have a second top plate that extends inward at a predetermined width in the upper part and a second hanging plate that hangs from the second top plate. Second side plate and a corner plate that connects both ends of the first and second side plates, and the corner plate is folded back into a triangle and is overlapped with the inner surface of the first or second side plate to form the first and the second plates with respect to the bottom plate. After the two side plates are erected, the first and second top plate are folded back into a flat shape so that the upper space of the first side plate is narrower than the lower space. The shape from the 2 side plate side is assembled into a trapezoidal shape, the inner box is abutted to close the bottom surface, the 3rd side plate having the bottom plate formed at the lower portion, and the 4th side plate having the bottom plate piece formed at the lower portion contact the 1st and It is characterized in that it stands up along the second hanging plate so that a trapezoidal void can be formed between the first side plate and the third side plate.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 In FIGS. 1 to 5, a paper heat insulation box 1 is composed of an outer box 3 and an inner box 5 inserted into the outer box 3. The outer box 3 and the inner box 5 are made of paper materials such as corrugated cardboard and thick kraft paper, at least the inner surfaces of which are coated with a synthetic resin waterproof film.

The bottom plate 7 of the outer box 3 is a horizontally long rectangular plane, and the first side plate 9 has folds 11 on its long side edges, and the second side plate 13 has folds 15 on its short side edges. The corner plates 17 continuous at both ends of the side plate 9 and the second side plate 13 are integrally formed with fold lines 19 and 21.

At least the outer box 3 is provided on the upper portion of each first side plate 9.
The first top face plate 23 extending in the longitudinal direction with a width twice the thickness of the paper material forming the fold forms the fold line 25, and at the edge of the first top face plate 23 extends in the longitudinal direction with a predetermined width. One hanging plate 27 is integrally formed via a fold line 29.

A second top surface plate 31 extending in the longitudinal direction with an arbitrary width has a fold line 33 at the upper portion of each second side plate 13.
A second hanging plate 35 extending in the longitudinal direction with a predetermined width is formed at the edge of the second top plate 31 via a fold line 37.

A fold line 19.2 in each corner plate 17 continuously provided at both ends of each of the first side plate 9 and the second side plate 13.
The fold line 21 on the side of the second side plate 13 is formed so that the upper part thereof is located inside the second side plate 13 with a width that matches the thickness of two sheets of paper material in the vertical direction. Second side plate 1
The fold line 19 on the third side is formed in the vertical direction. As a result, both end edges of the second top surface plate 31 of the second side plate 13 are formed as overlapping pieces 31 a that are superposed on the upper surfaces of both ends of the first top surface plate 23. Then, each corner plate 17 is formed with a fold line 39 that bisects each corner plate 17 and is folded inward and overlapped.

The bottom plate 7 and each of the second side plates 13 are formed with a series of center fold lines 41 passing through the center in the width direction in the longitudinal direction, and each of the second side plates 13 is formed with an X-shaped inclined fold line 43. Further, engaging pieces 35a are integrally formed at both ends of the second hanging plate 35 in the second side plate 13, and the engaging pieces 3 are formed.
The first hanging plate 27 corresponding to 5a is formed with a notch 27a in which the engaging piece 35a is locked. A relief portion 17a is formed on the upper surface of each corner plate 17 for escaping the engagement piece 35a engaged with the notch 27a.

The outer box 3 described above is assembled as follows. That is, each corner plate 17 is provided with a fold 39 and a fold 19.
At 21, the first side plate 9 and the second side plate 13 are erected with respect to the bottom plate 7 while being folded inward and overlapped. Then, the first top face plates 23 of the respective first side plates 9 that have stood up after the corner plates 17 that were overlapped in a triangle were placed on the inner surfaces of both ends of the first side plate 9 were inward, and from each first top face plate 23 1 Hanging the hanging plate 27 and folding it back. As a result, the corner plates 17, which are triangularly overlapped with each other, are positioned in the space formed by the first side plates 9 and the first hanging plates 27.

Also, after the second top plate 31 is folded back inward at the upper portion of each of the second side plates 13 that have stood upright, the second hanging plate 35 is formed.
And the engaging piece 35a of the second hanging plate 35 is locked and fixed to the notch 27a of the first hanging plate 27. As a result, the outer box 3 is assembled into a trapezoidal shape having a narrow upper width when viewed from the second side plate 13.

The inner box 5 has a structure known as a so-called A-type box,
The first side plate 9 and the second side plate 1 of the outer box 3 which are made of the same or different paper material as the outer box 3 and are assembled as described above.
Third side plates 45 and fourth side plates 47 having an inner width of 3 and a height corresponding to the inner depth of the outer box 3 are alternately provided.
5, a bottom plate 49 extending in the longitudinal direction with a width half the width of the third side plate 45 is folded back, and a bottom plate piece 51 extending in the longitudinal direction with an appropriate width is folded under the fourth side plate 47. It is made possible.

Each of the fourth side plates 47 has a central fold line 53 extending upward at an intermediate portion in the longitudinal direction, a third side plate 45 and a fourth side plate 4.
An inclined fold line 55 extending from the lower part of the fold line 7 to the middle part in the height direction of the fourth side plate 47, and a fold line 57 continuous to the central fold line 53 in the middle part in the longitudinal direction of the bottom plate piece 51.
Are formed respectively.

Then, the inner box 5 is formed by folding back the paper material into a plane-R shape so that a pair of the third side plate 45 and the fourth side plate 47 are opposed to each other, and the adhesive piece 45a formed at the end of the third side plate 45 is adjacent to the inner box 5. The bottom plate 49 is bonded to the inside of the fourth side plate 47, then the bottom plates 49 are folded back inward at the lower portion of the third side plate 45 to close the bottom surface, and then the bottom plate pieces 51 are inwardly placed at the lower portion of the fourth side plate 47. It is folded back and overlapped on the upper surface of the bottom plate 49. Next, the bottom plate 49
A double-sided tape (not shown) is attached to the abutting part of the base plate and a part of the bottom plate piece 51 to form the inner box 5 in a box shape.

When the inner box 5 is inserted into the outer box 3, the first side plate 9 and the third side plate 45, the second side plate 13 and the fourth side plate 4 are inserted.
Voids 56 and 58 formed by the first top plate 23 and the second top plate 31 are formed between 7 and 7. Among them, in the void portion 56 formed between the first side plate 9 and the third side plate 45, since the second side plate 13 is formed in a trapezoidal shape, the mutual interval in the lower portion is enlarged and the void portion 56 is formed. It is possible to increase the capacity and enhance the heat insulation effect. The inner box 5 of the paper insulation box 1
When a product (not shown) requiring heat insulation is housed inside, a lid (not shown) is placed with an intermediate plate (not shown) placed on the upper end surfaces of the side plates of the outer box 3 and the inner box 5. No.) should be provided.
In this case, the height of the first and second top plates and the third
Since the heights of the fourth side plate and the fourth side plate are substantially the same, the adhesion of the middle plate to the paper heat insulation box 1 can be enhanced.

Further, the paper heat insulating box 1 may be integrated or carried as a so-called air box with the inner box 5 still fitted in the outer box 3 assembled in a box shape. As a result, the integration efficiency is significantly reduced. In order to avoid this, as shown in FIG. 6, with the inner box 5 still inserted in the outer box 3, the fold lines 41 and 43 of the outer box 3 and the seam of the bottom plate 49 of the inner box 5 and the fourth side plate. 47 folds 53 and 55 and bottom plate piece 5
By folding the paper-made heat insulating box 1 in the boat shape at the fold line 57 to make it substantially flat, stacking and stacking can be performed efficiently. When used as an air box, the above-mentioned fold line is unnecessary.

In the present embodiment, the gap 56 between the first side plate 9 and the third side plate 13 can be made large in capacity while the width of the first top plate 23 is minimized to enhance the step heating effect. As a result, the inner box 5
The storage capacity can be increased by increasing the capacity.

Embodiment 2 As shown in FIGS. 7 and 8, a paper heat insulation box 71 according to this embodiment is composed of an outer box 73 and an inner box 75 made of the same paper material as in the first embodiment. 73 is formed by alternately providing first side plates 77 and second side plates 79 and adhering an end edge of the first side plate 77 to an inner surface of an end edge of the second side plate 79 to form a plane rectangular shape.
The first top plate 81 and the first side plate 77 are provided on the first side plate 77.
The hanging plate 83 is integrally provided, and the second side plate 79 is provided on the lower part.
Is integrally provided with a bottom plate 85 having a width half the longitudinal width thereof.

A second top plate 87 and a second hanging plate 89 are integrally provided on the upper portion of the second side plate 79, and a bottom plate having a width of 1/2 or less of the longitudinal width of the first side plate 77 is provided on the lower portion. The piece 91 is integrally provided. Both ends of the second hanging plate 89 are cut out by the width of the first top plate 81.

Then, the first side plate 77 and the second side plate 79 are bent so as to face each other and the edges are adhered to each other, and then the bottom plate piece 91 at the lower part of the second side plate 79 is folded back inward. The bottom plate 85 in the lower part of 77 is overlapped on the bottom plate piece 91, and an adhesive tape (not shown) is attached to the bottom plate 85 corresponding to the butted portion. Further, the first top plate 81 on the upper part of the first side plate 77 is folded back inward, and then the first hanging plate 83 is folded back and hung down. In this state, the second top plate 87 above the second side plate 79 is folded back inward, and then the second hanging plate 89
Fold back and let it hang down. At this time, the outer case 73 is kept in a box shape by sandwiching the second hanging plate 89 between the first hanging plates 83.

The inner box 75, like the outer box 73, has a second hanging plate 8
Third side plate 93 and first hanging plate 83 having a width of 9 mutual intervals
It is formed by folding back a paper material, in which the fourth side plates 95 having the widths of the mutual intervals are alternately provided, into a plane R-shape, and then adhering the edges together. The fourth side plate 95 is provided below the third side plate 93.
A bottom plate 97 having a half width in the longitudinal direction is provided so as to be able to be folded back, and a bottom plate piece 99 having an appropriate width that is not in contact with each other is provided at the lower portion of the fourth side plate 95 so as to be able to be folded.

Then, the third and fourth side plates 93 and 95 are bent in a plane-R shape, the edges are adhered, the bottom plate 97 is folded back inward to close the bottom opening, and then the bottom plate piece 99 is moved inward. It is folded back and overlapped on the lower surface of the bottom plate 97. In addition, an adhesive tape (not shown) is attached to the bottom plate 97 corresponding to the abutting location to close the gap at the abutting location.

When the inner box 75 is inserted into the outer box 73 to form the paper heat insulating box 71, the first side plate 77 and the third side plate 9 are formed.
3 and a space 101 corresponding to the width of the first top plate 81.
However, a space 103 corresponding to the width of the second top plate 87 is formed between the second side plate 79 and the fourth side plate 95, and the bottom plate 85 of the outer box 73 and the bottom plate 97 of the inner box 75 are formed. A gap portion 105 having a width corresponding to the thickness of the overlapping bottom plate pieces 91 and 99 is formed between these gap portions 101 and 103.
Product (not shown) housed in inner box 75 by 105
Heat insulation.

As shown in FIG. 9, bottom plate pieces 91 and 99
In this case, the bottom plate piece 9
The void portion 105 having a thickness of 9, 4 sheets can be formed to enhance the step heating effect.

In the above description, the heights of the first and third side plates, the second side plate and the fourth side plate when the inner box is inserted into the outer box are made to match, but as shown in FIG. The heights of the third and fourth side plates are made slightly lower than that of the second side plate so that the middle plate 106 having a thickness matching the height difference is inserted into the outer box while being positioned on the upper surface of the inner box. May be. On the contrary, as shown in FIG. 11, the third and fourth side plates may be made higher than the first and second side plates so that the lid 107 can be fitted into the upper edge of the inner box. 10 and 11 show the paper heat insulation box 1 according to the first embodiment, the paper heat insulation box 71 according to the second embodiment may be used.

[0028]

According to the present invention, it is possible to improve the storage efficiency while avoiding the reduction of the product accommodating volume with respect to the outer box volume while maintaining the heat insulating effect.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a paper heat insulation box according to a first embodiment.

FIG. 2 is an overall perspective view.

FIG. 3 is a development view of an outer box.

FIG. 4 is a development view of an inner box.

5 is a vertical cross-sectional view taken along the line AA of FIG.

FIG. 6 is a perspective view showing a folded state of a paper heat insulation box.

FIG. 7 is an exploded perspective view showing an entire paper heat insulation box according to a second embodiment.

8 is a vertical cross-sectional view taken along the line BB of FIG.

FIG. 9 is a partial cross-sectional view showing a modified embodiment of the second embodiment.

FIG. 10 is a partial cross-sectional view showing a modified embodiment.

FIG. 11 is a partial cross-sectional view showing a modified embodiment.

[Explanation of symbols]

1.71-Paper insulation box, 3.73-Outer box, 5.75-Inner box, 7-Bottom plate, 9-First side plate, 13-Second side plate, 17-
Corner plate, 23-First top plate, 27-First hanging plate, 31-Second top plate, 35-Second hanging plate, 45-Third side plate, 47-
Fourth side plate, 56- / 58-gap

Claims (7)

[Claims] 1. A paper heat insulation box in which an inner box made of paper material which is the same as or different from the outer box is inserted into an outer box made of paper material, wherein the outer box stands up from the long side edge of the bottom plate and A pair of opposing first side plates having a first top plate extending inward with a predetermined width and a first hanging plate hanging from the first top plate, and standing up from the short side edges of the bottom plate, and A pair of opposing second side plates having a second top plate having a width shorter than the lower width and extending inward at a predetermined width and a second hanging plate hanging from the second top plate; And a corner plate that connects both ends of the second side plate, and the corner plate is folded back into a triangle, and the first and second side plates are erected with respect to the bottom plate while overlapping the inner surface of the first or second side plate. The 1st and 2nd top plates are folded back into a flat shape and the upper space of the first side plate is narrower than the lower space and the shape from the second side plate side is trapezoidal. Assembled, the inner box is butted and the third side plate having a bottom plate closed at the bottom and the fourth side plate having a bottom plate piece formed at the bottom are erected along the first and second hanging plates. A paper heat insulation box in which a trapezoidal void can be formed between the first side plate and the third side plate. 2. A center fold extending in the longitudinal direction at an intermediate portion in the width direction of the bottom plate and the second side plate of the outer box, and a center of the second side plate extending from both lower ends and upper ends of the second side plate. A fold line that intersects the fold line is provided, and a fold line that substantially coincides with the center fold line and the tilt fold line of the second side plate is provided on the fourth side plate of the inner box, and each fold line is inserted with the inner box inserted in the outer box. The paper heat insulation box according to claim 1, wherein the paper heat insulation box can be folded in a plane by bending along the same. 3. The paper heat insulation box according to claim 1, wherein engaging pieces are provided on both ends of the second hanging plate, and engaged parts are provided on the first hanging plate in correspondence with the engaging pieces. 4. A paper heat-insulating box in which an inner box made of paper material which is the same as or different from the outer box is inserted into an outer box made of paper material, and the outer box extends upward inward with a predetermined width. A first side plate that has a first top plate that projects and a first hanging plate that hangs from the first top plate and that has bottom plates that are butted against each other at the bottom to close the bottom and a predetermined inward direction at the top A second top plate extending in width and a second hanging plate hanging from the second top plate are formed, and second side plates having bottom plate pieces are alternately provided in the lower portion, and the first or second side plate is a flat surface. With the first and second top plates folded back in a rectangular shape and the first and second hanging plates hanging down while the bottom plate pieces are folded inward, the bottom plates abut each other. It folds back to the bottom and is assembled with the bottom closed, and the inner box contacts the first and second hanging plates. 3rd and 4th side plates are provided alternately, and at the bottom of the 3rd side plate, bottom plates that abut against each other and close the bottom surface are provided. The bottom plate is folded back so as to be abutted against each other in a state of being folded back in a plane B shape, and then a bottom plate piece is superposed on the lower surface of the bottom plate.
A space is formed between the side plate and the third and fourth side plates by the first and second top plate, and a space is formed between the bottom surface of the outer box and the bottom surface of the inner box by the bottom plate pieces overlapping each other. Paper insulation box. 5. The first and second top plate and the upper ends of the third and fourth side plates are aligned with each other when the inner box is inserted into the outer box.
To 4 paper insulation boxes. 6. The paper product according to claim 1, wherein the upper ends of the third and fourth side plates are located below the first and second top plate when the inner box is inserted into the outer box. Insulation box. 7. The paper product according to claim 1, wherein the upper ends of the third and fourth side plates are located above the first and second top plate when the inner box is inserted into the outer box. Insulation box.