JP2002068170A - Foldable packaging box with seamless bottom - Google Patents

Abstract

(57) [Summary] [Problem] Easy and quick folding from one cardboard,
The present invention provides a foldable packing box having a seamless bottom that can be made at the lowest possible cost, without any risk of bottoming out or collapse during handling even when heavy packed articles are stored. SOLUTION: The corrugated cardboard has side walls 2A to 2D connected to each side of a square bottom surface 1 and extends from each corner of the bottom surface 1 between each side end of each pair of adjacent side walls. Fold D for polymerization
A folding piece 6 provided with ridges is laid across the fold, a lid piece 3 is provided on one side wall surface, and a strip-shaped lid supporting pieces 4 and 5 are provided on the other three side wall surfaces. The folding pieces 6 are provided with engaging projections 7a, 7 protruding from the upper edge in a superposed state.
b are respectively provided, and are engaged with the notches 8 or the insertion holes 9 provided in the lid support pieces 4 and 5. Also, on the back side of the lid piece 3,
Cut 13 for fitting into which the projecting piece 7b is fitted halfway
At a depth that does not reach the surface side of the lid piece 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a simple and quick operation for folding and folding without placing a heavy packaged article in a box and preventing the box from being collapsed during handling. The present invention relates to a foldable packing box which is formed from a single piece of corrugated cardboard and has a seamless bottom, which is constructed so as to be able to be made and made as inexpensively as possible.

[0002]

2. Description of the Related Art FIGS. 7 to 10 show a typical example of a folding box conventionally used for packing heavy articles such as motors. FIG. 9 shows the state in which the lid is opened, and FIG. 10 shows the back side of the box. This conventional packing box 50 is assembled from one piece of corrugated cardboard 51 punched into the shape shown in FIG.

A corrugated cardboard 51 is provided with a bottom flap 53 at each lower edge of four side wall surfaces 52 which are integrally formed through folds, which are peripheral walls of the box. Engagement irregularities 53a and 53b are provided on the edge to engage these with each other to form the bottom surface of the box. Also, 4
A lid piece 54 is continuously provided on one upper edge of the side wall surfaces 52, and a support piece 5 for supporting the lid piece 54 is provided on the remaining three upper edges.
5 are connected in series.

As shown in FIG. 8, the cardboard 51 is folded in a folded box by connecting the four side walls 52 in the form of a rectangular tube crushed flat by a glue margin piece 56. It becomes 50 and stored and transported in this state.

[0005] The above-mentioned packing box 50 has considerable drawbacks as listed below. (A) The bottom of the box assembled by engaging the four bottom flaps with each other is easily disengaged by the weight of the packaged article,
There's a good chance that you'll run out. (B) In order to prevent this bottoming out, extra labor and cost are required, such as laying a reinforcing plate on the inner bottom surface of the box and attaching a packing tape to the engagement points. (C) Extra cost for gluing the glue pieces is required. (D) Some skill is required to quickly engage the bottom flaps. (E) Since the packing box made of cardboard is stored and transported in a bulky state, as if the rectangular cylindrical body was flattened, the storage and transportation costs are increased and the handling is difficult.

[0006]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to easily and quickly fold from a single piece of cardboard,
Even if you put heavy packaged goods, there is no danger of falling out or breaking down during handling, and it has excellent handling characteristics during storage and transportation, and it has a seamless bottom that can be made as cheaply as possible To provide a tatami box.

[0007]

In order to achieve the above-mentioned object, a foldable packing box having a seamless bottom according to the present invention comprises:
The cardboard is folded up into a box shape with a lid from one piece of corrugated cardboard. The corrugated cardboard is provided with side walls 2A to 2D connected to each side of a square bottom surface 1 through folds, respectively. Folding pieces 6 provided with overlapping folds D extending obliquely from the respective corners of the bottom surface 1 are laid across the respective folds E between the side ends of each set of side wall surfaces. And one side wall surface 2A has a lid piece 3
On the other side wall surfaces 2C to 2D, a strip-shaped lid support piece 4 or 5 is connected to each upper edge via a fold, and each folded piece 6 has Engagement protruding pieces 7a, 7 protruding from the edge
b is provided on each of the lid support pieces 4 and 5 to engage or insert the engaging projections 7a and 7b so as to fix the overlapping state of the folding pieces 6, respectively. A hole 9 is provided. And, on the back surface side of the lid piece 3, a fitting cut 13 for partially fitting the engaging projection 7 b may be provided at a depth that does not reach the front side of the lid piece 3.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 4 shows a state in which the lid is opened, and FIG. 5 shows a state in which the lid is closed. The packing box 200 of this embodiment can be easily and quickly folded from a single cardboard 100 having the shape shown in FIG. Can be raised.

The shape of the cardboard 100 will be described with reference to FIG.
Bottom surface 1. On each side of the bottom surface 1, side wall surfaces 2A to 2D serving as peripheral walls of the box are connected to each other via folds A for rising. In addition, as shown in the upper left of FIG.
By making the waving direction of the core paper 0 oblique to the fold A for rising, consideration is given to make the strength characteristics of the packing box 200 uniform in the three-dimensional direction.

On the upper edge of the side wall surface 2A, a lid piece 3 is continuously provided via a fold B to form a side wall surface 2B and a side wall surface 2C,
At each upper edge of the 2D, a strip-shaped lid bearing piece 4 and 5, 5
Are connected to each other via a fold line C.

Further, a pair of side wall surfaces 2 adjacent to each other
A, 2C, 2C, 2B,..., Between each side end, a square folding piece 6 provided with a stacking fold D extending obliquely from each corner of the bottom surface 1, Each is straddled.

As shown in FIG. 2, each of the folding pieces 6 is provided with a pair of engaging pieces for each edge, which is the upper end of the folding piece 6 when folded in a triangular shape along the overlapping fold D. The protruding pieces 7a and 7b are protruded at predetermined intervals. The engaging projections 7a and 7b are
When each folding piece 6 is folded in two, as shown in FIG.

Then, as shown in FIGS.
At both ends of the lid support piece 4 connected to B, an engagement notch 8 for engaging the engagement projection 7a is provided along the fold C. In addition, near the both ends of the lid support piece 4, an engagement projection 7 is provided.
Insertion holes 9 for inserting b are provided respectively. Further, the lid support piece 4 is provided with an insertion hole 11 for inserting a lid closing piece 10 protruding from the tip edge of the lid piece 3 to form a cut and raised shape, and a fold C It is provided along.

A pair of lid support pieces 5 and 5 which are opposed to each other are provided with a projection 7a for engaging a folding piece 6 adjacent to this side end at the side end on the side in contact with the lid piece 3. A notch 12 for hooking for hooking is provided.

Further, on the back side of the lid piece 3, an engagement projection 7 is provided.
b is inserted into the cover piece 3
Is provided in a notch so as not to reach the surface side. The fitting cut 13 in this embodiment is formed in a U-shape as shown in FIGS. 1 and 5, and both ends thereof are provided so as to be in contact with the fold B.

Next, from the cardboard 100, the packing box 200
An example of a procedure for assembling the components will be described with reference to FIGS. Each of the folds provided on the corrugated cardboard 100 has a fold in a predetermined direction, and a fold D for polymerization is provided with a half-cut line for facilitating bending.

First, as shown in FIG. 2, a pair of side walls 2C and 2D facing each other are erected along the rising fold A, respectively. Along with this, each of the total of four folding pieces 6 is bent halfway along the folding fold D for polymerization, and the side walls 2A and 2B are also raised halfway. Next, as shown in FIG. 3, when the side wall surface 2B is completely erected, the folding pieces 6, 6 connected to both ends thereof are completely folded, and the inside of the side wall surface 2B is hit. Touched.

At this stage of folding, when the lid support piece 4 continuously connected to the upper edge of the side wall surface 2B is horizontally lowered inside the box as shown in FIG. 3, the notches 8 at both ends thereof are engaged. 8, one engagement projection 7 a projecting from the upper edge of the folded folding piece 6 is fitted. As a result, the above-described form during the folding is securely fixed.

At the same time, the other engaging projection 7b is
The lid support pieces 5 are respectively fitted into insertion holes 9 provided near both side ends. Thus, the folded state of the folding piece 6 is securely fixed.

Thereafter, as shown in FIG. 3, if the side wall surface 2A is also completely erected, the folding pieces 6, 6 connected to both side ends thereof are provided.
Also, the packing box 200 with the lid 3 opened is extremely easily and quickly folded along the inside of the side wall surface 2A in a completely folded state.

In order to put a packed article (not shown) in the packing box 200, the packing box 200 is folded not only after the packing box 200 is folded up but from the stage where the packing box 200 is still unfolded on one cardboard 100. The packaged article may be previously placed at a predetermined position on the bottom surface 1 at any stage before being raised.

As described above, each side wall surface 2A is in the middle of folding the box.
In a state in which 立 ち 2D has not yet completely risen, the degree to which each side wall surface impedes the storage operation of the packaged articles is reduced, and the work can be performed quickly and easily. However, in which of the above stages the storage efficiency can be maximized depends on the shape of the packaged article, the condition of the packing work line, etc., and may be determined on a case-by-case basis.

When the packaged articles have been stored in the packaging box 200, as shown in FIG.
When each box is tilted horizontally inward, the engaging notches 12 provided at the respective side ends are engaged with the engaging projections 7a of the folding pieces 6 connected to both side ends of the side wall surface 2A. , 2
The standing state of D is fixed.

When the lid 3 is finally closed, the engaging projection 7b of the folding piece 6 is pressed against the fitting cut 13 provided on the back side of the lid 3. Cut 1 for mating
Since the area surrounded by 3 is easily compressed and deformed due to the characteristics of the cardboard, the engaging projection 7b is forcibly pushed into this area as shown on the left side of FIG. .
Therefore, the upright state of the side wall surface 2A and the two-fold state of the folding piece 6 are reliably fixed.

Thus, all of the four folding pieces 6 are securely fixed in the folded state. Therefore, for example, even if a packing box 200 containing a heavy article such as a motor tilts obliquely during handling and a force is applied to strongly push any of the side walls 2A to 2D outward. The packing box 200 as shown in FIG.
This can reliably eliminate the possibility that the folding form of the vehicle may be collapsed.

The bottom surface 1 of the packing box 200 has no seams at all of its four sides since the side walls 2A to 2D are integrally connected to each other, so that the conventional packing box 5 shown in FIGS.
As in the case of 0, the danger of the package article falling out due to the weight is completely eliminated.

In addition, due to the above-described integral structure, the structural strength of the packing box 200 is significantly increased as compared with the packing box 50. Of course, the folded pieces 3 which are arranged in contact with the inner side surfaces of the side walls 2A and 2B serve to further reinforce the box and cushion and protect the packaged articles.

[0028]

As is apparent from the above description, the foldable packing box having the seamless bottom according to the present invention has excellent practical effects as listed below. (A) Since the bottom surface of the box is completely seamless with the peripheral wall surface of the box in a seamless state, there is no danger that the box will fall out even when heavy packed articles are stored. (B) Therefore, unlike a box with a seam at the bottom, the labor and cost for separately taking measures to reinforce the bottom can be saved. (C) The folded state of the folded piece is reliably fixed by engaging the engaging projection on the upper edge thereof with the engaging notch or the insertion hole of the lid supporting piece. (D) Therefore, even if the packing box containing the heavy packing articles is tilted during the handling and a strong outward pressing force is applied to the side wall surface, there is no danger that the folding form of the box collapses. There is no. (E) In addition, it is possible to prevent the box from being collapsed by pushing the engaging projection into a fitting cut provided on the back side of the lid. (F) Since the fitting cut does not reach the surface of the lid piece, the appearance of the box is not impaired. (G) The folded pieces in the folded state serve to reinforce the box and serve as a cushioning material for protecting the packaged articles. (H) Due to the folding structure and the folding habits provided in advance at each fold, even a beginner of packing work can easily and quickly fold the packing box from one sheet of material, And it can be performed reliably. (I) Since the packaged goods can be stored in the middle of the folding of the box, the side wall surfaces of the four circumferences are not completely raised yet, this storage work can be considerably easily performed in some cases. (J) Unlike conventional packing boxes, in which storage and transportation are performed in a form in which a rectangular tube is crushed, storage and transportation can be performed in a state of being developed into one sheet-like material. (K) Therefore, it is easy to store and transport since a large number of pieces are stacked, are not bulky and are stable without shaking.

[Brief description of the drawings]

FIG. 1, showing an embodiment of the present invention, is a perspective view of a state in which a packing box is developed into one piece of cardboard.

FIG. 2 is a perspective view showing a state in which the packing box has begun to be folded from cardboard.

FIG. 3 is a perspective view showing a state where the packing box is substantially folded up;

FIG. 4 is a perspective view of the packing box in a state where the lid is opened.

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

FIG. 6 is a longitudinal sectional view taken along the line YY of FIG. 5;

FIG. 7 shows a conventional example, and is a plan view showing a state in which a packing box is developed into one piece of cardboard.

FIG. 8 is a plan view showing a state where the packing box is folded flat.

FIG. 9 is a transparent perspective view of the folded packing box.

FIG. 10 is a perspective view of the packing box as viewed from the back side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 100 Corrugated cardboard 200 Packing box 1 Bottom surface 2A-2D Side wall surface 3 Lid piece 4, 5 Lid support piece 6 Folding piece 7a, 7b Engagement projection 8 Engagement notch 9 Insertion hole 10 Lid closing piece 11 Insert cut 12 Hook Notch for stop 13 Cut for fitting A Folding fold B, C fold D Stacking fold E Standing fold 50 Conventional packing box 51 Cardboard 52 Side wall 53 Bottom flap 54 Cover piece 55 Support piece 56 Glue allowance Piece

Claims (2)

[Claims] 1. A cardboard box which is folded up from a single cardboard box into a box-like shape with a lid, wherein the cardboard box is provided on each side of a rectangular bottom surface 1 with side walls 2A to 2D interposed by folds. A fold piece 6 having a stacking fold D extending obliquely from each corner of the bottom face 1 is provided between each side end of each pair of adjacent side wall faces, and a fold E for standing is provided. The lid 3 is provided on one side wall surface 2A, and the other side wall surfaces 2C to 2D
, A strip-shaped lid support piece 4 or 5 is connected to each upper edge via a fold, and each folding piece 6 has an engaging projection 7a projecting from the upper edge in a superposed state. , 7b are respectively provided on the lid support pieces 4, 5 so that the engaging projections 7a, 7b are engaged or inserted in order to fix the overlapping state of the folding pieces 6, the engagement notch 8 or the insertion notch. A foldable packing box having a seamless bottom, wherein a fitting hole 9 is provided. 2. A fitting cut 13 for partially fitting the engaging projection 7b into the back surface of the cover piece 3 at a depth that does not reach the front side of the cover piece 3. Foldable packaging box with the seamless bottom as described.