JP2002019769A - Packaging box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof packaging box which can be built up at the time of usage, and developed into a flat state after the usage. SOLUTION: For this packaging box, a corrugated fiberboard on the internal surface of which a polyethylene film 40 is bonded is used. Then, a corner plate 28 which is connected between a longer edge side side-plate 12 and a shorter edge side side-plate 14 is folded inward by a diagonal folding line 33, and the corner plate 28 is superposed on the inside of the shorter edge side side-plate 14. Then, a folding back plate 20 is folded back to the inside. At the same time, an engaging plate 22 is inserted in the inside of a protruding section 32 of the corner plate 28, and locked.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging box, and more particularly to a packaging box having side plates connected to respective sides of a bottom plate.

[0002]

2. Description of the Related Art A packaging box formed of a cardboard case is widely used as a packaging means for providing various articles for distribution. For example, in order to supply vegetables collected in a production area to a consumption area, the vegetables are stored in a packaging box and transported. In this case, ice may be added together in order to maintain the freshness of the stored vegetables.

[0003]

When ice is put together with vegetables in a normal packaging box, the ice melts as the temperature rises, and the corrugated cardboard constituting the packaging box is moistened, and the corrugated cardboard is destroyed and the vegetables are destroyed. There are problems such as spilling, water dripping, and wetting of peripheral articles.

[0004] In view of such problems, it is considered to use a packaging box made of, for example, a plastic case. In the case of a plastic case, even if it gets wet, the case does not break and the articles inside do not fall off. However, the plastic case is more expensive than the cardboard case and has a problem that it is difficult to recycle. Incineration and disposal after use can generate harmful gases and cause air pollution, and high-temperature heat can damage the incinerator.

The present invention has been made in view of such problems, and provides a packaging box which is made of corrugated cardboard, has waterproof properties, and is prevented from dripping water. With the goal.

[0006]

According to one aspect of the present invention, there is provided a packaging box having side plates connected to four sides of a bottom plate, wherein a corner plate is connected between adjacent side plates so as to be bent to both side plates. And forming an oblique bending line on the corner plate, forming a locking portion by cutting off the front end side of the corner plate so as to cover the oblique bending line, and connecting with the corner plate. A locking plate is formed at the end of one of the side plates to be formed, and the corner plate is folded along the diagonal bending line so as to overlap inside or outside the one side plate, and the locking plate is engaged with the corner plate. The present invention relates to a packaging box locked to a stop.

Here, an opening may be formed in the one side plate at a position where the locking plate is folded, and the locking plate may be detached from the locking portion through the opening. Further, the oblique bending line has an inclination angle of 45 degrees, is formed so as to cross the corner plate diagonally, and a diagonal notch is formed at the tip of the oblique bending line by a square notch. The locking portion may be formed so as to coincide with the oblique bending line, and furthermore, formed so as to protrude into the square notch. Further, the corner plate may be folded inside the one side plate, and a handle hole may be formed at a position below the opening of the one side plate and corresponding to a root portion of the locking plate. . Further, the locking plate may be connected to a tip of a folded plate formed at a tip of the one side plate. Further, the corner plate may be folded outside the one side plate, and a tip of the folded plate and a root portion of the locking plate may constitute a handle.

According to another invention of the present application, in a packaging box in which a bottom plate has a polygonal shape with even-numbered sides and side plates are connected to each side, a corner plate is folded between adjacent side plates into two side plates. The slanted bending line is formed in the corner plate, and the slanted bending line is folded so as to overlap the outside or the inside of one adjacent side plate. The present invention relates to a packaging box, characterized in that a locking plate is continuously provided at the tip of the box, and the locking portion of the locking plate is locked inside the oblique bending line of the bent corner plate.

In this case, a reinforcing plate may be continuously provided at a tip of the other side plate adjacent to the one side plate, and the reinforcing plate may be folded back outside or inside the other side plate and joined. Further, the bottom plate may be a regular hexagon.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. First, a first embodiment will be described with reference to FIGS. This embodiment relates to a rectangular parallelepiped packaging box assembled using corrugated cardboard punched into a shape as shown in FIG.

As shown in FIG. 1, the cardboard has a rectangular bottom plate 10. A long-side plate 12 is connected to the bottom plate 10 via a bending line 11 on the long side of the bottom plate 10. A short side plate 14 is provided on the short side of the bottom plate 10 via a bending line 13.

A cover plate 16 is connected to a tip end of the long side plate 12 via a bending line 15. The width of the cover plate 16 is １ ／ of the width of the bottom plate 10, so that when assembled, the ends of the cover plates 16 on both sides abut to close the upper opening. I have.

A horizontally long folded plate 20 is connected to a front end portion of the short side plate 14 via a pair of bending lines 19.
A locking plate 22 is connected to a front end side of the folded plate 20 via a pair of bending lines 21. The locking plate 22 has a lateral dimension that is approximately 1/3 the value of the folded plate 20, and a bending line 23 is formed at an intermediate position.

An opening 24 is formed from the position where the pair of bending lines 19 are formed on the base side of the folded plate 20 to the short side plate 14. A handle hole 25 is formed in the short side plate 14 below the opening 24.

Between the long side plate 12 and the short side plate 14, there is provided a corner plate 28 having a substantially square shape as a whole. The corner plate 28 is connected to the long side plate 12 and the short side plate 14 by bending lines 29 and 30 so as to be bent, respectively.

The leading end of the corner plate 28 is cut out in a substantially square shape to form a notch 31. Note that notch 31
Is formed so that the diagonal thereof substantially coincides with the oblique bending line 33 obliquely crossing the corner plate 28. A protruding portion 32 is formed on the long side side plate 12 with respect to the bending line 33 so as to protrude into the notch 31.

The corrugated cardboard punched into such a shape is:
As shown in FIG. 2, a core 39 is interposed between the front liner 37 and the back liner 38 by bending. A polyethylene film 40 is bonded to the front side of the front liner 37. The corrugated cardboard shown in FIG. 1 is punched so that the polyethylene film 40 is located inside the packaging box, whereby a waterproof packaging box is assembled.

Next, the operation of assembling the cardboard shown in FIG. 1 and assembling the packaging box will be described. As shown in FIG.
The long side plates 12 and the short side plates 14 are bent at right angles to the bottom plate 10 by the bending lines 11 and 13. At this time, the long side plate 12 and the short side plate 14
Is bent inward by a bending line 33 obliquely crossing the center of the corner plate 28. That is, the corner plate 28 is folded in such a manner that the bending line 33 projects inward, and the long side plate 12 and the short side plate 14
Are folded substantially at right angles to the bottom plate 10.

When the long side plate 12 and the short side plate 14 are bent at right angles to the bottom plate 10, the corner plate 28 connected between the side plates 12, 14 is shown in FIG. As shown in FIG. 4, it is joined so as to overlap the inside of the short side plate 14. In such a state, the folded plate 20 at the upper end of the short side plate 14 is folded 180 degrees inward as shown in FIG. 5 by a pair of bending lines 19, so that the folded plate 20 overlaps the upper side of the corner plate 28. .

When the folded plate 20 is laid on the upper side of the corner plate 28, the locking plate 22 provided on the tip side of the folded plate 20 is formed on the corner plate 28 as shown in FIGS. Inserted into the locking portion 32 and locked.

As described above, since the bending line 23 is formed at the intermediate position of the locking plate 22 (see FIGS. 6 and 8).
A), the locking plate 22 is bent at the intermediate position by the bending line 23, and the front end portion of the locking plate 22 is inserted into the protrusion 32 as shown in FIGS. 7 and 8B. . Then, in conjunction with the operation of folding the folded plate 20 further inward, the portion of the locking plate 22 closer to the base than the bending line 23 is completely inserted into the protrusion 32 as shown in FIG. 8C. .

By the locking operation of the locking plate 22, the short side plate 14, the corner plate 28, and the folded plate 20 are locked in an overlapping state, whereby the packaging box is assembled in a rectangular parallelepiped shape. Maintain state. This state is shown in FIG. Then, in such a state, the desired articles are stored inside, and then the lid 16 is closed to pack the articles.

As shown in FIG. 2, such a packaging box uses corrugated cardboard having a polyethylene film 40 bonded inside, so that even if a wet article is stored therein,
Corrugated cardboard does not break down with water. There is no dripping on the way. That is, it becomes a waterproof cardboard. Therefore, even if ice is added together with vegetables, water does not drip when the ice inside melts. It is also possible to transport the fresh fish while cooling it with the ice that was put in with it.

Such packaging boxes are supplied in the form shown in FIG. 1, that is, stacked in a state where the cardboard is unfolded. At the time of use, assembly is performed by the operations shown in FIGS. That is, assembly is performed before use. Such assembling consists only of a step of bending a corrugated cardboard punched into the shape shown in FIG. 1, and is assembled in a rectangular parallelepiped shape without using an adhesive or a glue.

After transporting the goods using such a packaging box, when the packaging box is to be reused or disposed, an operation reverse to the above operation may be performed. That is, a finger is inserted into the opening 24 shown in FIG. 8C, whereby the upper end of the locking piece 22 is moved downward as shown in FIG. 8B.
And upward as shown in FIG. This results in the state shown in FIG. Therefore, after this, the long side plate 1
2 and the short side plate 14 are respectively rotated with respect to the bottom plate 10 and opened to a deployed state. This results in a flat plate-like state as shown in FIG. 1, that is, a developed state. The cardboard thus unfolded and flattened can be stacked and transported in any number of layers, and by repeating such operations, the packaging box can be used repeatedly, and the movement or movement of the packaging box during that time is possible. It allows reasonable transportation and storage without requiring any space for storage.

Next, a second embodiment will be described with reference to FIGS. The corrugated cardboard used in this embodiment is a waterproof corrugated cardboard having a polyethylene film 40 bonded inside similarly to the corrugated cardboard shown in FIG. Then, such a waterproof cardboard is punched as shown in FIG. This shape is almost the same as the shape shown in FIG.
The configuration is the same as that shown in FIG. 1 except for a structure in which the handle hole 25 is not provided in the short side plate 14. Therefore, the description uses the description of the first embodiment.

As shown in FIG. 10, the long side plate 12 and the short side plate 14 of this cardboard 10 are bent at right angles to the bottom plate 10 along bending lines 11 and 13. At this time, the corner plate 28 connected between the long side plate 12 and the short side plate 14 is bent outward by an oblique bending line 33 as shown in FIG.

As shown in FIG. 11, if the long side plate 12 and the short side plate 14 are respectively bent at right angles to the bottom plate 10, they are then bent outward by oblique bending lines 33. The bent corner plate 28 is bent along the folding lines 29 and 30 so as to overlap the outside of the short side plate 14.

Thereafter, the folded plate 20 at the upper end of the short side plate 14 is folded outward by a pair of bending lines 19, and the folded plate 20 is overlapped on the short side plate 14 by a corner plate 28. Is further superimposed as shown in FIG. At this time, the locking plate 22 connected to the distal end of the folded plate 20 is locked by the projection 32 constituting the locking portion of the corner plate 28 as shown in FIGS.

The locking operation of the locking plate 22 is performed by bending the leading end of the locking plate 22 inward by a bending line 23 provided at an intermediate position of the locking plate 22, FIG.
And as shown in FIG. 14A. Thereafter, the folded plate 20 is further rotated, and the locking plate 22 on the tip end side of the folded plate 20 is completely inserted into the projection 32 of the corner plate 28 as shown in FIGS. 14B and 15. Thereby, the corner plate 28 overlapped on the outside of the short side side plate 14
Is locked while being held down by the turning plate 20.

Therefore, in such a state, as shown in FIG. 15, the cover plate 16 is opened, and articles are stored and packed therein. After packing, the cover plate 16 is closed to be used for distribution.

When disassembling the used packaging box, the distal end of the locking plate 22 is pushed down by a finger through the opening 24 shown in FIG. 14B as shown in FIG. 14A. Thereafter, the folded plate 20 is pivoted upward to unlock the corner plate 28. Thereafter, the corner plate 28 is bent outward at a right angle to the short side plate 14 as shown in FIG. 11, and the long side plate 12 and the short side plate 14 are connected to each other in FIG. Open as shown. Thereby, it is developed into a flat state as shown in FIG.

Such a packaging box is assembled and locked in a rectangular parallelepiped shape as shown in FIG. 15 by using only a bending operation without using an adhesive or hot melt. By releasing the locking of the locking plate 22, the flat plate can be developed as shown in FIG. Therefore, it can be assembled in a rectangular parallelepiped shape at the time of use, and can be stacked or stored in a flat state as shown in FIG. 9 when not in use.

In this cardboard box, a handle hole is not formed in the short side plate 14, but a corner plate 28 is folded outside the short side plate 14 and a folded plate 20 is folded outside the corner plate 28. Become like Therefore, this folded plate 20
Of the locking plate 22 as a handle. And thus the short side plate 1
Since the handle hole is not formed in 4, the waterproof effect is further enhanced.

Next, a third embodiment will be described with reference to FIGS. This embodiment is not a rectangular parallelepiped,
It is a packaging box having a waterproofing function so that the whole shape can be assembled in a hexagonal column shape. Such a packaging box is assembled from stamped cardboard as shown in FIG.

The corrugated cardboard shown in FIG.
A rectangular bottom plate 10 is provided, and every other three sides of the bottom plate 10 are provided with side plates 12 through bending lines 11 respectively.
Are continuously installed. Further, side plates 14 are continuously provided on the remaining three sides via bending lines 13. And side plate 1
A reinforcing plate 16 is continuously provided at the tip of 2 via a bending line 15.

On the other hand, a fold plate 20 is connected to the end of the side plate 14 via a pair of fold lines 19, and is locked to the end of the fold plate 20 via a fold line 21. The plate 22 is provided continuously. The locking plate 25 is provided with locking portions 25 on both sides thereof. Note that the locking portion 45
Can be bent with respect to the locking plate 22 by a bending line 46.

A corner plate 28 is provided between the side plates 12 and 14 adjacent to each other. Corner plate 28 is bent line 2
9 and 30 are respectively connected to the side plates 12 and 14 on both sides so as to be bendable. An oblique bending line 33 is formed in the corner plate 28 so as to cross the central portion thereof.

Next, the operation of assembling the packaging box by folding such a cardboard will be described. As shown in FIG.
The six side plates 12 and 14 are bent at right angles at bending lines 11 and 13 with respect to 0. At this time, the corner plates 28 are bent outward by the oblique bending lines 33, and the corner plates 28 that are folded in a triangular shape by the oblique bending lines 33 are alternately side plates 14 as shown in FIG. Overlap outside.

Thereafter, the bending line 19 on the tip side of the side plate 14 is formed.
Is folded outward, whereby the folded plate 20 overlaps the outside of the corner plate 28 as shown in FIG. After this, the locking portions 45 on both sides of the locking plate 22 are further added.
Into the inside of the oblique bending line 33 of the corner plate 28. Thus, the folded plate 20 and the locking plate 22 are locked by the corner plate 28 as shown in FIG. By such a locking operation, the corner plate 28 is folded outside the side plate 14, and the folded plate 20 is further locked outward in a state of being overlapped, thereby maintaining the hexagonal column shape.

According to such an embodiment, as shown in FIG. 16, a packaging box punched can be assembled when used, and no adhesive or gluing is required at that time.
When it is used, the disassembling is performed by performing the operation reverse to the above-described assembling operation and removing the locking portions 45 on both sides of the locking plate 22 from the inside of the corner plate 28. In other words, by performing an operation reverse to the above-described assembling operation, it is developed into a flat state as shown in FIGS.

Even if the reinforcing plate 16 on the distal end side of the side plate 12 is folded outside the side plate 12 and overlapped and glued in advance, the assembling operation or the disassembling operation as described above is not hindered. Therefore, the reinforcing plate 16 is connected to the side plate 12.
It is desirable to fix in advance on the outer surface of the device by gluing or the like.

Even in such a packaging box, complete waterproofing is achieved by using the cardboard having the polyethylene film bonded to the inner surface as described above, and liquid leakage occurs even when wet articles are stored therein. Nothing. Alternatively, it is also possible to store a liquid therein.

Although the present invention has been described with reference to the illustrated embodiments, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the technical concept of the present invention. It is. For example, in the above embodiment,
Although it is configured to be assembled from corrugated cardboard having a polyethylene film 40 bonded to the inner surface, instead of such a configuration, it may be assembled from corrugated cardboard having at least one surface impregnated with paraffin.

[0045]

According to one aspect of the present invention, in a packaging box having side plates connected to four sides of a bottom plate, a corner plate is connected between adjacent side plates in a state where the corner plates are connected to both side plates in a bendable manner. Forming an oblique bending line on the corner plate,
Cut out the tip side of the corner plate so as to cover the diagonal bending line to form a locking part, form a locking plate at the tip of one side plate connected by the corner plate, and diagonally bend the corner plate It is folded by a line so as to overlap the inside or outside of one of the side plates, and the locking plate is locked to the locking portion of the corner plate.

Therefore, according to such a packaging box, the corner plate is folded so as to overlap the inside or outside of one of the side plates with an oblique bending line, and the locking plate is locked to the locking portion of the corner plate. Thereby, the packaging box can be assembled, and the rectangular parallelepiped shape is maintained. Therefore, it is possible to assemble such a form at the time of use. In addition to releasing the locking by the locking plate and opening the corner plate outward, the flat plate can be unfolded and stored or transported in a folded state. Here, if the plate-shaped body constituting the packaging box is made of a waterproof material, the waterproof packaging box is formed by the folded structure of the corner plate.

According to another aspect of the present invention, in a packaging box in which a bottom plate has a polygonal shape with even-numbered sides and side plates are connected to each side, a corner plate is folded between adjacent side plates into two side plates. It is connected continuously in a state where it can be bent and forms an oblique bending line on the corner plate, and is folded by the oblique bending line so as to overlap the outer side or the inner side of one adjacent side plate. A locking plate is continuously provided at the end, and the locking portion of the locking plate is locked inside the oblique bending line of the bent corner plate.

Therefore, according to such a packaging box, a packaging box having a polygonal column shape can be obtained. Here, the corner plate is folded by an oblique bending line so as to overlap the outside or inside of one adjacent side plate, and the locking plate of one side plate is locked inside the oblique bending line of the corner plate. As a result, the polygonal column shape is maintained. Therefore, it is possible to assemble it into a polygonal pillar shape at the time of use, and to fold it flat when used.

[Brief description of the drawings]

FIG. 1 is a developed plan view of a packaging box according to a first embodiment.

FIG. 2 is an enlarged sectional view of a cardboard constituting the packaging box.

FIG. 3 is a perspective view showing an operation of assembling the packaging box.

FIG. 4 is a perspective view showing an operation of assembling the packaging box.

FIG. 5 is an external perspective view of the assembled packaging box.

FIG. 6 is an enlarged perspective view of a main part showing an operation of locking by a locking plate.

FIG. 7 is an enlarged perspective view of a main part showing an operation of locking by a locking plate.

FIG. 8 is an enlarged sectional view of a main part showing an operation of locking by a locking plate.

FIG. 9 is an exploded plan view of the packaging box according to the second embodiment.

FIG. 10 is an external perspective view showing an operation of assembling the packaging box.

FIG. 11 is an external perspective view showing an operation of assembling the packaging box.

FIG. 12 is an external perspective view showing an operation of assembling the packaging box.

FIG. 13 is an enlarged perspective view of a main part showing an operation of locking by a locking plate.

FIG. 14 is an enlarged vertical sectional view showing an operation of locking by a locking plate.

FIG. 15 is an external perspective view of the assembled packaging box.

FIG. 16 is an exploded plan view of a hexagonal column-shaped packaging box.

FIG. 17 is an external perspective view showing the assembling operation of the packaging box.

FIG. 18 is an external perspective view showing the assembling operation of the packaging box.

FIG. 19 is an external perspective view of the assembled packaging box.

FIG. 20 is an enlarged sectional view showing a structure of locking by a locking portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Bottom plate 11 Bending line 12 Long side plate 13 Bending line 14 Short side plate 15 Bending line 16 Cover plate / reinforcement plate 19 Bending line 20 Fold plate 21 Bending line 22 Locking plate 23 Bending line 24 Opening 25 Handle hole 28 Corner plate 29, 30 Bending line 31 Notch 32 Projection (locking portion) 33 Diagonal bending line 37 Front liner 38 Back liner 39 Core 40 Polyethylene film 45 Locking portion 46 Bending line

Claims (9)

[Claims] 1. A packaging box comprising side plates connected to four sides of a bottom plate, wherein a corner plate is connected between adjacent side plates in a state where the corner plates are connected to both side plates in a bendable manner. And a notch is formed by cutting out the tip side of the corner plate so as to extend over the oblique bending line, and is locked to the tip of one side plate connected by the corner plate. A plate is formed, and the corner plate is folded by the oblique bending line so as to overlap inside or outside of the one side plate, and the locking plate is locked to a locking portion of the corner plate. Packaging box. 2. The locking device according to claim 1, wherein an opening is formed in the one side plate at a position where the locking plate is bent, and the locking plate is detached from the locking portion through the opening. The packaging box described. 3. The oblique bending line has an inclination angle of 45 degrees, is formed so as to cross the corner plate diagonally, and has a square notch at the end of the oblique bending line. 3. The locking portion according to claim 1, wherein the diagonal line is formed so as to coincide with the diagonal bending line, and the locking portion is formed so as to project into the square notch. 4. Packaging box. 4. The corner plate is folded inside the one side plate, and a handle hole is formed at a position below the opening of the one side plate and at a position corresponding to a root portion of the locking plate. Claims 1 and 2, wherein
Or the packaging box according to claim 3. 5. The locking plate according to claim 1, wherein said locking plate is connected to a tip of a folded plate formed at a tip of said one side plate. 4. The packaging box according to 4. 6. The device according to claim 5, wherein the corner plate is folded outside the one side plate, and a tip of the folded plate and a root portion of the locking plate constitute a handle. Packaging box described in. 7. A packaging box in which a bottom plate has a polygonal shape with even-numbered sides, and side plates are connected to each side, and a corner plate is connected to both side plates between adjacent side plates in a bendable manner. In this state, a diagonal bending line is formed on the corner plate, and the diagonal bending line is folded so as to overlap the outside or inside of one of the adjacent side plates, and is locked at the tip of the one side plate. A packaging box, wherein a plurality of plates are connected to each other, and a locking portion of the locking plate is locked inside a diagonal bending line of the bent corner plate. 8. A reinforcing plate is connected to a tip portion of the other side plate adjacent to the one side plate, and the reinforcing plate is folded back to the outside or inside of the other side plate and joined. The packaging box according to claim 7, 9. The packaging box according to claim 7, wherein the bottom plate is a regular hexagon.