JP2003285883A - Heat-insulating packing box made of corrugated fiberboard - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat-insulating packing box made of a corrugated fiberboard which causes no troublesome problem in processing after disposal, can be repetitively recycled and reused, and is relatively inexpensive and not bulky so that it can substitute for an expanded-styrene-made box. <P>SOLUTION: The packing box comprises a combination of a lidded packaging box for receiving perishable food or the like to be preserved in cold, and a set of upper and lower heat-insulating outer packaging boxes formed in a double-wall structure in a tray form to be put over the packaging box in a butted state. A single piece of corrugated fiberboard to be a material of the packaging box is formed in such a shape that sidewalls are connected with four sides of a rectangular bottom face and corner pieces equipped with two- folding slant creases extending between side ends of the adjacent sidewalls, so that the packaging box is folded in a seamless state free from water leakage. The heat-insulating outer packaging boxes are improved in strength and heat insulation by incorporating a reinforcing plate folded in an upward U-shape. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-insulating packaging box made of corrugated cardboard for transporting items such as fresh seafood that need to be kept cold.

[0002]

2. Description of the Related Art Heretofore, it has been customary to use a Styrofoam packaging box when delivering fresh food that needs to be kept cool by courier or the like.

[0003]

Styrofoam has the characteristics of excellent heat insulation, being freely moldable using a mold, and being extremely light. However,
On the other hand, there are many social problems such as many problems in the way of disposal after disposal and waste of limited oil resources.

Therefore, an object of the present invention is to replace the conventional packing box made of Styrofoam with excellent features such that it can be repeatedly reused after disposal, it does not waste resources, is relatively inexpensive, and is not bulky during storage. Get in, provide a corrugated insulation box.

[0005]

In order to achieve the above object, a heat-insulating packaging box made of corrugated cardboard according to the present invention is a packaging box with a lid for storing fresh food or the like that needs to be kept cold, and a butt box shape. It is made up of a pair of upper and lower tray-shaped heat-insulating outer boxes, which are used as the material for the packaging box.
The corrugated cardboard has two side walls connected to each of the four sides of the rectangular bottom face through folds, and between the side edges of the adjacent side walls, two corrugated sheets extending outward from each corner of the bottom face are used for folding. The corner pieces provided with the oblique folds are provided so as to straddle each other through the folds, and the lid pieces are continuously provided through the folds at the upper edges of the pair of side walls facing each other. One piece of corrugated board, which is the material for the heat-insulating outer box, is formed by connecting the outer walls to each of the four sides of the rectangular bottom surface (or the top surface) through folds, and the upper edge of each outer wall. The inner side walls for superimposing on the inner side surface of the inner side wall are connected to each other through double folds. -It is characterized in that it has a form in which insert pieces for inserting into the overlapping gaps on both outer side walls are connected in series through folds. Then, in the heat-insulating outer box, a reinforcing plate bent in an upward U-shape is arranged, the bottom part thereof is along the bottom surface of the heat-insulating outer box, and the rising pieces connected to both ends of the bottom part are
It is advisable to assemble them by inserting them into the overlapping gaps on both outer side walls. Also, the width of the reinforcing plate should be
Shorter than the length of both outer walls, and the lower edges of the inner walls are
It is advisable to provide a notch for fitting the reinforcing plate. In addition, as a material for the packaging box, waterproof corrugated cardboard,
Alternatively, waterproof cardboard may be used.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 10 shows the appearance of the use state of the heat insulating packaging box 300 of this embodiment.
Has the longitudinal sectional structure shown in FIG.

That is, the heat-insulating packaging box 300 includes a packaging box 201 with a lid that is folded up from the single corrugated board 101 shown in FIGS. 1 and 2 into the form shown in FIGS. 4 and 5, and FIG.
As shown in FIG. 6, the single corrugated board 102 shown in FIG. 6 for covering the packaging box 201 in a butt shape from the upper and lower sides is folded up into the form shown in FIG.
It is composed of a combination of a pair of tray-shaped heat insulating outer boxes 202, 202.

Further, as shown in FIGS. 8 and 9, the reinforcing plate 103 shown in FIG. 7 is assembled in the heat insulating outer box 202 in a state of being bent in an upward U-shape, so that the heat insulating outer box is formed. The structural strength and heat insulation performance of 202 are improved.

As shown in FIG. 1, one corrugated board 101, which is a material of the packaging box 201, has a rectangular area at the center thereof,
It is the bottom surface 1 of the packaging box 201. On the four sides of the bottom 1,
The side walls 2 to 5 forming the peripheral wall of the box are connected to each other through folds.

A pair of adjacent side walls 2, 3, 3, 4,
Between each side edge of 4, 5 and 5, 2 is a square corner piece 6
Are laid across each fold. The corner piece 6 is provided with a two-fold oblique fold A so as to extend outward from each corner of the bottom surface 1. Slanted fold A of each corner piece 6
Of the half portions on both sides of the side walls, one half portion on the side in contact with the side walls 2 and 4 is used as an adhesive margin piece 6a for superimposing on the inner side surfaces of the side walls 2 and 4, respectively. In addition, at the corner of each corner piece 6,
A rectangular notch a is provided.

Further, lid pieces 7 and 8 are continuously connected to the upper edges of the pair of side walls 2 and 4 facing each other through folds. Further, the lid stopper piece 9 projecting from the leading edge of the lid piece 7 is inserted into the hooking hole b provided on the base end side of the lid piece 8. A strip-shaped flange piece 10 is continuously provided on the upper edges of the side walls 3 and 5 via a fold.

On the other hand, for folding up the heat insulating outer box 202,
In the single corrugated board 102 shown in FIG. 6, the rectangular area in the central portion is the bottom surface (or top surface) 11 of the heat insulating outer box 202. On the four sides of the bottom surface 11, the outer side walls 12, 13, 1
4 and 15 are connected to each other via a fold.

At the upper edge of each of the outer side walls 12-15, there is an inner side wall 22-for superimposing on their respective inner side surfaces.
25 are connected to each other through double folds B. Furthermore,
As shown in FIGS. 8 and 9, the outer side walls 12, 14 and the inner side walls 22, 24 are inserted into the overlapping gaps formed by overlapping the inner and outer side walls, as shown in FIGS. Inserting pieces 16 and 26 for fitting are connected to each other through folds.

Hanging pieces 27 for fixing the folded state of the heat-insulating outer box 202 are projectingly provided on the respective upper ends of the respective inner side walls 23, 25 at both ends thereof. This hook 2
7 is inserted into the insertion holes d (see FIG. 9) formed by the cut-and-raised cuts c provided at the upper portions of both side ends of the inner side walls 22 and 24. Further, as shown in FIG. 9, notches 28 for fitting the reinforcing plates 103 are provided at the lower edges of the inner walls 22 and 24, respectively.

Next, the reinforcing plate 103 is made of one thick rectangular corrugated cardboard as shown in FIG. Reinforcing plate 103
The width dimension W of is smaller than the length dimension L of the bottom surface 11 by a predetermined dimension.

The reinforcing plate 103 has a form in which a rising piece 32 is connected to both ends of a bottom portion 31 which is orthogonally overlapped on the bottom surface 11 of the heat insulating outer box 202 through folds. As shown in FIGS. 8 and 9, the rising piece 32 is
It is to be inserted into the overlapping gap of the outer side walls 12, 22 and 14, 24, and the height dimension thereof is substantially equal to the height of the overlapping gap.

Next, how to assemble the packaging box 201 will be described with reference to FIGS. First, the corrugated cardboard 101 that has been developed flat is glued to the respective glue margin pieces 6a of the four corner pieces 6 and then on the inner surfaces of the adjacent side walls 2 and 4 via the creases. They are superposed as shown by adding a virtual line f in FIG. With this bending movement, the side wall 3,
5 is folded on the bottom surface 1 by itself.

When the adhesive (adhesive) is allowed to harden in this superposed state, the folded packaging box 201 is completed as shown in FIG.

In order to fold up the folded packaging box 201 into a box form, one of the opposite side walls 2, 4 (or 3, 5) is simply raised with both hands.
Along with this erection operation, the other opposing side walls 3 and 5 also erect together, and as shown in FIG. 4, the packaging box 201 with the lid open is folded up by almost one-touch operation. FIG. 5 shows a state in which the lid of the packaging box 201 is closed.

The folded packaging box 201 has a bottom surface 1
As shown in FIGS. 2 to 4, the four side walls 2 to 5 are connected in a completely seamless state. Therefore, by using water-resistant corrugated cardboard or water-resistant corrugated cardboard as the material of the packaging box 201, the packaging box can be stored or transported during storage / transportation, even if a product containing considerably moisture such as fresh seafood is stored. There is no danger of water leaking from 201.

Next, an example of how to fold up the heat-insulating outer box 202 will be described. First, in the middle of the bottom surface 11 of the expanded cardboard 102, the bottom portion 31 of the reinforcing plate 103 that is bent in the upward U shape in advance is attached to the bottom surface 11.
(See FIG. 8).

After that, a pair of inner and outer side walls 12, 22 and 14, 24 facing each other are folded inward along the double fold line B as shown in FIG. While standing up. At that time, the rising pieces 32, 32 of the reinforcing piece 103
Are sandwiched between the inner and outer side walls of the overlapping wall. And
Each of the insertion pieces 16 and 26 in a two-ply stacked state, which are connected to both side ends of the inner and outer both side walls via a fold, are bent inward at right angles.

Subsequently, the remaining pair of inner and outer side walls 13,
23 and 15, 25 inward along the double fold line B
Stand up while folding. At that time, the insertion pieces 16, which are superposed in the overlapping gaps on both the inner and outer side walls,
Insert 26.

When the inner and outer side walls are completely erected, as shown in FIG.
As shown in FIG. 5, the hooking pieces 27 projecting from both side ends of the inner side walls 23 and 25 are inserted into the insertion fitting holes d formed in a cut and raised shape at both side ends of the adjacent inner side walls 22 and 24. Can be fitted. Thus, the heat-insulating outer box 202 whose folded state is securely fixed can be folded up very easily and quickly.

Next, the heat-insulating packing box 30 comprising a combination of the packing box 201 and two heat-insulating outer boxes 202, 202.
The use and function of 0 will be described with reference to FIGS. First, items such as fresh seafood that need to be kept cold are stored in the folded packaging box 201 together with "sawdust" if necessary, and the lid pieces 7 and 8 are closed.

After that, the lower half of the packaged packaging box 201 is fitted into the lower heat-insulating exterior box 202 of the upper and lower sets. When the upper half of the packaging box 201 is covered with the upper heat-insulating outer box 202, the upper and lower heat-insulating outer boxes 202, 202 are shaped like "the middle skin" as shown in FIG. Butt in close contact.

Then, finally, if a pressure-sensitive adhesive tape (not shown) is wrapped around the butt line, a series of heat insulating packing work using the heat insulating packing box 300 is extremely simple and quick, and Surely done.

In this packed state, the packing box 201 is shown in FIG.
As shown in FIG. 7, the outer periphery of the peripheral wall is wrapped in the peripheral wall portion of the heat insulating outer box 202 having a double wall structure and excellent in heat insulating property. The bottom surface and the top surface of the packaging box 201 are covered with the bottom surfaces (or the top surfaces) 11 of the upper and lower heat-insulating outer boxes 202, 202.

Between the bottom surface 11 and the bottom surface 1 of the packaging box 201 and the two lid pieces 7 and 8 stacked together, the bottom portion 31 of the thick corrugated reinforcing plate 103 having good heat insulating properties is provided.
Is intervening. Therefore, the bottom surface and the top surface of the packaging box 201 are also well heat-insulated.

In this embodiment, however, in order to save the amount of corrugated cardboard used, etc., as shown in FIGS. 6 and 7, the lateral width W of the reinforcing plate 103 is set to the length of the bottom surface (top surface) 11. It is shorter than the dimension L. Therefore, as shown in FIG. 11, the reinforcing plate 103 is lacking on both sides of the bottom surface 11 in the longitudinal direction.

However, since this lacking portion becomes an air layer e having a better heat insulating property than the corrugated board, the saving of the amount of the corrugated board used contributes to the improvement of the heat insulating performance.

Further, in the heat-insulating outer box 202, as can be understood from FIG. 11, the bottom surface (or the top surface) 11 and the inner and outer double side walls 12, 22, 14, 24 respectively have the reinforcing plate 10.
3, the bottom portion 31, and the raising pieces 32, 32 and the inserting pieces 16, 2
It will be reinforced by 6. Therefore, even when the packed heat-insulating packing boxes 300 are stacked in multiple stages, it is possible to sufficiently bear a heavy load. In addition, when some large impact force is exerted during the handling of the heat insulating packaging box 300,
The heat-insulating outer box 202 surely protects the packaging box 201.

[0033]

As is apparent from the above description, the heat-insulating packing box made of corrugated cardboard according to the present invention is a conventional packing box made of styrofoam, which has been used for home delivery of fresh seafood or the like that needs to be kept cold. In comparison, it has the practically superior functions listed below. (A) Unlike styrofoam, finite petroleum resources are not wasted, and there is no need to be confused about measures for treating discarded boxes. (B) The cardboard packaging box can be recycled into cardboard for repeated use. (C) Since it is made of corrugated cardboard with good heat insulation and has a double-wall and multi-wall structure, heat insulation performance comparable to a styrofoam box can be obtained. (D) Since it can be folded compactly, storage and transportation costs can be reduced. (E) The structural strength and heat insulation performance of the packaging box can be significantly improved by only incorporating one reinforcing plate in the heat insulation exterior box. (F) Even if the reinforcing plate that also serves as a heat insulator is made smaller than the size of the heat-insulating outer box in order to save material costs,
The heat insulation is rather enhanced by the air layer formed in the lacking part of the reinforcing plate. (G) Since the packaging box folds up from one sheet of water-resistant corrugated card in a seamless state, there is no risk of water leaking out of the box even if the packaged article contains a considerable amount of water.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, and is a plan view of one corrugated board which is a material of a packaging box.

FIG. 2 is a perspective view of one cardboard as a material of the packaging box.

FIG. 3 is a perspective view showing a state in which the packaging box is folded.

FIG. 4 is a perspective view showing the folded packaging box with the lid open.

FIG. 5 is a perspective view of the packaging box with the lid closed.

FIG. 6 is a perspective view of one corrugated cardboard used as a material for the heat-insulating outer box.

FIG. 7 is a perspective view of the reinforcing plate.

FIG. 8 is a perspective view showing a state in which the heat-insulating outer box is being folded.

FIG. 9 is a perspective view of the heat-insulated outer box that has been folded up.

FIG. 10 is a perspective view showing a usage state of the heat insulating packaging box.

FIG. 11 is a vertical sectional view of the heat insulating packaging box.

[Explanation of symbols]

101, 102 cardboard 201 packaging box 202 Insulated outer box 103 Reinforcement plate 300 insulated packaging box 1 bottom 2-5 side walls 6 corner pieces 6a Adhesive piece 7,8 Lid piece 9 Lid stopper 10 Flange piece 11 Bottom (top) 16,26 Insert 12 to 15 outer walls 22-25 Inside walls 27 hanging piece 28 Notch 31 bottom 32 rising piece A diagonal fold B double fold a notch b Hook hole c Cut and cut d Insertion hole e Air layer

Claims (4)

[Claims] 1. A combination of a packaging box 201 with a lid for storing fresh food or the like that needs to be kept cold, and a pair of tray-shaped heat-insulating outer boxes 202 that cover the packaging box in a butt shape. One piece of corrugated board 101, which is a material of the box 201, has four side walls of a rectangular bottom surface 1 with side walls 2 to 5 connected continuously through folds, and a bottom surface 1 is formed between side edges of adjacent side walls. Each corner piece 6 provided with a two-fold oblique fold A extending outwardly from each corner of each of the ridges is laid across each fold, and a lid is provided at each upper edge of a pair of side walls facing each other. A piece of corrugated board 102, which is a material for the heat-insulating outer box 202, is provided with pieces 7 and 8 that are connected in series through folds.
Is formed by connecting the outer side walls 12 to 15 to each of the four sides of the rectangular bottom surface (or top surface) 11 through folds, and superimposing the inner side surfaces on the upper edges of the outer side walls. Inside walls 22 to 25 for
Are continuously provided through double folds B, and at each side end of one pair of inner / outer side walls facing each other, for inserting into another pair of inner / outer side wall overlapping gaps, Insert 1
A heat-insulating packaging box made of corrugated cardboard, characterized in that it has a configuration in which 6, 26 are connected in series through folds. 2. The heat-insulating outer box 202 includes a reinforcing plate 103 bent upward in a U shape, and a bottom plate 31 of the reinforcing plate 103 extending along a bottom surface 11 of the heat-insulating outer box and connected to both ends of the bottom part 31. 2. The heat-insulating packaging box made of corrugated board according to claim 1, wherein 32 is assembled in a state in which they are fitted into the overlapping gaps on both the inner and outer side walls, respectively. 3. The width dimension W of the reinforcing plate 103 is made shorter than the length dimension L of the bottom surface 11 of the heat insulating outer box 202, and the notch 2 for fitting the reinforcing plate 103 at the lower edge of the inner walls.
8. The heat-insulating packaging box made of corrugated board according to claim 2, wherein 8 is provided. 4. The heat-insulating packing box made of corrugated board according to claim 1, wherein waterproofing corrugated board or waterproof corrugated board is used as the material of the packaging box 201.