JPH0427775Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a cardboard box for heat/cold insulation, which is suitable for transporting and storing fresh foods, frozen desserts, medicines, etc. while maintaining their quality.

[Prior art]

Conventionally, as this type of corrugated cardboard box, one in which a synthetic resin foam sheet, an aluminum vapor-deposited film, and a synthetic resin film are successively laminated on the inner surface is known (Japanese Utility Model Publication No. 18346/1983). This is assembled by using cardboard with these materials laminated on one side, and the aluminum vapor deposition film is formed by applying aluminum vapor deposition to the front surface of a foam sheet, or by using a synthetic resin film with aluminum vapor deposition applied to the back surface. There are cases where it is pasted.

When the inner surface of a cardboard box has such a laminated structure, convection and conduction of heat are mainly cut off by the cardboard and the foam sheet, and radiation is cut off mainly by the aluminum vapor-deposited film.
The inside of the cardboard box retains heat and cold, and the synthetic resin film protects the laminated structure of the cardboard box, while also providing water resistance to the cardboard.
The cold storage function is maintained.

[Problem that the invention attempts to solve]

However, the conventional cardboard boxes mentioned above have an assembly structure that uses a single layer of cardboard, so they do not have sufficient insulation function and are not suitable for keeping the inside warm or cold for long periods of time. It was perfect and warm. In addition, since the inner surface has a laminated structure of synthetic resin foam sheet, aluminum vapor deposition film, and synthetic resin film, when folding the cardboard to assemble the box, the laminated structure interferes with the folding, making it difficult to Because of the bending process, it is not possible to obtain a smooth bend line, and the folded part has the disadvantage of being uneven and unsightly.

In view of the above-mentioned circumstances, this idea was developed to create a heat/cold storage corrugated board that is suitable for keeping the inside warm and cold for long periods of time, as the overall structure of the corrugated wall has excellent insulation properties. The purpose is to provide a box.

[Means for solving problems]

The structure of this invention to achieve the above object is that in a C-type corrugated box consisting of a box body and a lid body covering the box body, the box body and the lid body:
At least a pair of opposing side walls extend to the outer wall and an inner wall folded inward to form a double structure with a space in between, and when the box body and the lid are combined, each side has at least a triple structure. The bottom wall of the box body and the top wall of the lid body are provided with pads on their inner surfaces, and the box body, the lid body, and the cardboard forming both pads are each coated with a heat reflective film on at least one surface. The gist of the product is a cardboard box for heat and cold insulation, which is made with a synthetic resin film attached to the bottom.

[Effect]

According to the above structure, the structure of a C-type cardboard box is skillfully utilized, and although it is a simple structure, by covering it with a lid, each side has at least a triple structure of heat-reflecting films [implemented] Example] FIGS. 1 to 5 show one embodiment.

The corrugated cardboard box for heating and cooling has a so-called C-type assembly structure consisting of a box body A and a lid body B that covers it. The corrugated board F used is a double-sided corrugated board in which front and back liners 2 and 3 are attached to a core 1, a synthetic resin foam sheet 4 is attached on the back liner 3, and aluminum vapor deposition is applied to the back side. A synthetic resin film 6 is pasted onto the foamed sheet 4, so that an aluminum vapor deposited film 5 is formed between the foamed sheet 4 and the synthetic resin film 6 as a heat reflective film. However, the vapor deposited film 5 may be formed by performing aluminum vapor deposition on the foam sheet 4.

The box A has upright side walls 12, 1 on each side of the bottom wall 10.
2, 13, 13 are provided, and the lid body B has an assembled structure in which hanging side walls 15, 15, 16, 16 are provided on each side of the top plate 11, and hanging side walls 15, 15, 16, 16 are fitted to the outside of the upright side walls 12, 12, 13, 13, The bottom wall 10 and the top plate 11 are
A double corrugated structure is obtained by applying rectangular pads 18 and 19, which are separately formed from the same corrugated cardboard F, to the inner surface.

In addition, for the box A, the upright side walls 12, 12 on both the front and rear sides are assembled into a double structure consisting of an outer wall 12a and an inner wall 12b, and for the lid B, the hanging side walls 16, 16 at both left and right ends are the outer walls. wall 16
It is assembled into a double structure consisting of a and an inner wall 16b. External walls 12a, 16a and internal wall 12b,
16b, and connecting pieces 22, 23 are provided to hold the spaces 20, 21.
is inserted in between.

Regarding the double structure of the side walls 12 and 16, the bottom wall 1
The outer walls 12a, 16a, the folded connection pieces 27, 28, the inner walls 12b, 16b, and the end folded pieces 30, 31 are successively arranged from the top wall 11 to the inner wall 1.
Fold 2b and 16b inward to create folded piece 3 at the tip.
0 and 31 are pressed against parts 18 and 19.

However, the pads 18 and 19 may be placed above the folding pieces 30 and 31 to provide a space between them and the bottom wall 10 and the top wall 11.

The connecting pieces 22, 23 are provided continuously between the outer walls 12a, 16a and the side walls 13, 15 adjacent thereto, and have a fold line 32 formed therebetween, and are folded in half along the fold line 32 to form the outer surface. wall 12
a, 16a and the inner walls 12b, 16b, and fix them together with a wire needle or the like.

As for how to use the cardboard F, the box body A and the lid body B are assembled so that the 6th side of the film is on the outside. Further, it is preferable that the parts 18 and 19 be assembled so that the 6th side of the film is inside the box A or the lid B, that is, the box A is at the top and the lid B is at the bottom.

In the above cardboard box, when the lid B is placed on the box A, the side walls 15 of the lid B on both the front and back sides,
The outer wall 12a and the inner wall 12b of the box A have a triple corrugated structure (Fig. 5), and
On both the left and right sides, the outer wall 16a and inner wall 16b of the lid B and the side wall 13 of the box A form a triple corrugated structure (FIG. 4). Therefore,
Each side has a uniform triple structure of aluminum vapor deposited film 5. Further, each side has one layer of space 20 or 21.

Therefore, on each side, heat convection and conduction are cut off mainly by the space 20 or 21 and the cardboard structure, and the penetration of radiant heat is cut off by the triple aluminum vapor deposited films 5, 5, 5. The insulation properties on each side are very good.

Since the outer surface is entirely covered with the synthetic resin film 6, it can be protected from damage even if it gets wet with rain or dew. In addition, the other side of the cardboard F,
In other words, as shown by the two-dot chain line in Fig. 2, the front liner 2
If the synthetic resin film 6a is attached to the box, the entire inner surface of the box will be covered with the synthetic resin film 6, 6a, making it particularly suitable for transporting items containing moisture such as perishable foods.

In addition, the cardboard F is a synthetic resin foam sheet 4
Since it is folded with the edges facing outward, there are no wrinkles at the bending point, resulting in a nice, tight curved surface of the film 6, and the unevenness of the step on the core 1 is absorbed by the foam sheet 4 and appears on the surface of the film 6. There is no such thing, so the appearance is very good.

[Other Examples]

FIG. 6 shows another example of the structure of the corrugated board F. The corrugated board F has a C-tiered structure in which the pitch of the waves in the core 1 is small, and in this case,
An aluminum vapor-deposited film 5 is formed on the outer surface of the front liner 2, and a synthetic resin film 6 is adhered thereon. If the pitch of the waves on center core 1 is small like this,
In particular, the surface liner 2 does not show any unevenness, and the surface of the film 6 is smooth even if the foam sheet is not used as a base.

In this case as well, the surface of the aluminum vapor-deposited film 5 is used on the outside, but it is desirable to attach the synthetic resin film 6a to the back liner 3 so that both the inside and outside of the box are covered with the film.

FIG. 7 shows another developed view of the box A, showing not only the front and rear side walls 12, 12, but also the left and right side walls 1.
3 and 13 are double corrugated cardboard walls, and the left and right side walls 13 are constituted by a bottom wall 10, an outer wall 13a, a folded connection piece 35, an inner wall 13b, and an end folded piece 36. Further, regarding the front and rear side walls 12, 12, space holding pieces 37, 37 which are folded in half along a folding line 38 are extended from both ends of the inner wall 37.

For assembly, fold the connecting piece 22 in half and attach the outer wall 13a and inner wall 13b of the left and right side walls 13.
Insert the spacer between the outer wall 12a and the inner wall 12b of the front and rear side walls 12 by folding the spacing retaining piece 37 in half.
Insert it between.

[Effect of idea]

As explained above, according to the heat-insulating/cold-insulating cardboard box of this invention, when the box body and the lid body are combined, each side has at least a triple structure,
The box body, the lid body, and the cardboard constituting both parts each have a synthetic resin film pasted on at least one side with a heat reflective film facing down,
When the lid is placed on the box, each side has at least a triple layered structure of cardboard and heat reflective film, and together with the space on each side and the pads on the top and bottom, it has excellent insulation properties. , and has the excellent effect of being easy to assemble.

[Brief explanation of the drawing]

Figures 1 to 5 show one embodiment, with Figure 1 being a partially cutaway perspective view, Figure 2 being an enlarged sectional view of the cardboard, and Figures 3A and 3B showing the box and lid. A developed view, FIG. 4 is a sectional view seen from the front with the lid covered, and FIG. 5 is a sectional view seen from the same side. FIG. 6 is an enlarged sectional view of a cardboard according to another embodiment, and FIG. 7 is a developed view of a box according to still another embodiment. A...Box body, B...Lid body, F...Cardboard, 4
...Synthetic resin foam sheet, 5...Heat reflective film, 6
...Synthetic resin film, 10...Bottom wall, 11...
...Ceiling wall, 12, 13, 15, 16...Side wall, 12
a, 16a...inner wall, 12b, 16b...outer wall, 18, 19...pat.

Claims (1)

[Claims for Utility Model Registration] 1. In a C-type cardboard box consisting of a box body and a lid covering the box body, at least a pair of opposing side walls of the box body and the lid body are folded back inside the outer wall. It is formed into a double structure with an extended inner wall and a space in between, and when the box body and the lid body are combined, each side has at least a triple structure, and the bottom wall of the box body and the lid body are combined. A pad is arranged on the inner surface of the top wall of the box, and a synthetic resin film is attached to at least one surface of each of the box body, the lid body, and the cardboard that makes up both pads, with the heat-reflecting film facing down. A cardboard box for heating and cooling. 2. The corrugated cardboard box for heat/cold insulation according to claim 1 of the utility model registration claim, characterized in that the corrugated cardboard of the box body and the lid body are E-tiered corrugated cardboard. 3. A cardboard box for heat/cold storage according to claim 1 of the utility model registration claim, characterized in that a synthetic resin foam sheet is adhered to one side of the cardboard, and a heat reflective film is formed on the foam sheet. .