JP2002019768A - Corrugated fiberboard box equipped with multiple layer wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a corrugated fiberboard box equipped with a multiple layer wall, which eliminates such a problem that a conventional type box, wherein wing walls connected from respective side ends of one pair of confronted side walls are superposed and made into the other pair of confronted side walls, is weak to a force which pushes to open the side walls outward or the like, and of which the strength has been greatly increased. SOLUTION: One sheet of a corrugated fiberboard which becomes the material for this box is equipped with a configuration wherein to respective side ends of one pair of confronted side walls being connected to one pair of confronted edges of the bottom surface of the box, two folding wing walls to be doubly folded in the vertical direction are connected. Then, on the upper edges of one set of the doubly folding wing walls which have been already superposed and are confronted under a standing state, fitting pieces and notches for fitting which are fitted in each other, in order to fix the superposed state are provided. To the other pair of confronted edges of the bottom surface, the other pair of confronted side walls which are superposed on the doubly folding wing walls are connected. Then, lid pieces may be connected to one pair of the confronted side walls, and lid closing pieces may be connected to the other pair of the confronted side walls.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pair of sleeve walls which are continuously provided on one side of one side of a bottom of a box. In the case of a tray-shaped box in which the side walls are overlapped with each other to form the other opposing side wall, if a force is applied that pushes the side wall outward while the box is being handled, the sleeve walls are easily misaligned. The present invention relates to a corrugated cardboard box provided with a multi-layered wall so as to reliably eliminate problems such as the box being easily disintegrated due to movement, and to simultaneously obtain the effect of remarkably improving the pressure resistance of the box.

[0002]

2. Description of the Related Art FIG. 13 shows an example of a conventional cardboard box of the type described above, which is developed into a single cardboard box. The corrugated cardboard 400 has a central rectangular area as the bottom surface 50 of the box, and an outer wall 51 and an inner wall 52 folded inside the outer wall 51 are sequentially provided on one of the opposite sides through a fold. A sleeve wall 53 is continuously provided at each side end of both outer walls 51 via a fold.

[0003] On the other opposite side of the bottom surface 50, both outer walls 51 are provided.
In order to fix the pair of sleeve walls 53 facing each other in an overlapped state by standing up, a covering wall 54 for covering the overlapped sleeve walls 53 in a folded state is connected. (See FIG. 4 of the present invention). Reference numerals 55a and 55b denote engaging projections and fixing holes for fixing the covering state, and reference numeral 56 denotes a manual operation hole.

[0004]

In the conventional box of the above type, when a force is applied to push each side wall outward, the overlapped sleeve walls 53 are separated from each other. However, there was a problem that the shape of the box easily collapsed.

Accordingly, a main object of the present invention is to provide a tray-type box as described above, in which even if a force which pushes each side wall of the box outward is applied, there is no possibility that the form of the box is collapsed. Of course, an object of the present invention is to provide a corrugated cardboard box having a multi-layer wall whose strength is remarkably improved so as to sufficiently withstand multi-stacking of boxes.

[0006] An additional object of the present invention is to provide a pair of opposing side walls of the peripheral wall of the box, by stacking four or more cardboards, to ensure a high strength enough to withstand multiple boxes. Another object of the present invention is to provide a cardboard box in which thinner cardboard can be used because of the increased strength. Further, it is another object of the present invention to effectively use a cut piece produced when punching a corrugated cardboard piece having a required shape from a raw corrugated cardboard as a partition material in a box.

[0007]

According to the present invention, there is provided a cardboard box having a multilayer wall according to the present invention, wherein the cardboard box is folded from one piece of cardboard into a box shape. Has a middle rectangular area as a bottom face, and has one opposing side wall connected to one opposing side thereof. Each side end of the one opposing side wall is folded in two in the vertical direction via a fold for superimposition. A fitting piece and a notch for fitting are formed at the upper edges of a set of folded two-fold sleeve walls, which are provided with two folded sleeve walls in series and face each other in an upright state. The other side of the bottom face is provided with a form in which the other side wall for connecting to the folded wall is continuously provided.
A lid piece is connected to each upper edge of one of the opposing side walls, and a hook portion of the lid closing piece connected to each upper edge of the other opposing side wall is inserted into an insertion hole provided in the lid piece. You may make it fit. Alternatively, on each side end of one of the opposed side walls, instead of a lid piece, an inner wall is continuously provided via a fold for polymerization, and the lid closure piece is omitted,
A pair of hooking pieces are continuously provided at both ends of the upper edge of the other opposing side wall,
The top surface of one of the opposing side walls may be provided with an engagement hole for engaging the engaging piece. In this case,
While cutting the corrugated cardboard from the raw corrugated cardboard, the two pieces of cut off material generated between one set of hooking pieces are engaged in a cross shape to partition the inside of the tray into four sections. It should be a partition. Furthermore, on each side edge of one of the opposed side walls and the inner wall,
A single sleeve wall may be provided in place of the two-fold sleeve wall.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Several embodiments of the present invention will be described below in order. First, regarding the first embodiment,
This will be described with reference to FIGS. The cardboard box 201 of this embodiment, which is shown in a folded state in FIG. 7, is suitable for packing fruits and vegetables, and is shown in FIGS. 1 and 2 from a single cardboard 101 shown in plan and perspective views. Can be folded up.

As shown in FIG. 1, the middle rectangular area of the cardboard 101 is the bottom surface 1 of the cardboard box 201. Opposite side walls 2, 2 are connected to one side (vertical direction in the figure) of the bottom surface 1 via a fold A, respectively.

[0010] Two folded sleeve walls 3 are respectively provided on both side ends of one of the opposed side walls 2 with a fold B therebetween. The two-fold sleeve wall 3 is provided with a folding fold C at an intermediate height position.

On the upper edge of one of the opposing side walls 2, a lid piece 4 having a projection length half the width of the bottom surface 1 is continuously provided via a fold D. In the vicinity of both side ends of the lid piece 4, insertion holes 5 for closing the lid are provided in a cut-and-raised shape slightly oblique to the side ends.

Further, the other side of the bottom surface 1 (left and right in the figure)
On the opposing sides, the other opposing side walls 6 that are brought into contact with the outer side surface of the two-fold sleeve wall 3 are continuously provided via a fold E, respectively. A lid closing piece 7 having a short protruding length is connected to the upper edge of the opposing side wall 6 via a double fold F. At both ends of the lid closing piece 7, notches a for forming a hooking portion 7 a to be fitted into the insertion hole 5 are provided.

One of a pair of two-fold sleeve walls 3, 3 located on both sides of the opposing side wall 6, is cut and raised while straddling both sides of the fold C for polymerization. A fitting piece 8 formed in a shape is provided. The fitting piece 8 sandwiched between the parallel cuts b, b is provided with three parallel folds c. And
As shown in FIG. 5, a notch 9 for fitting into which the protruding fitting piece 8 protrudes into the other two folded sleeve wall 3 is fitted.
Is provided.

In FIG. 1, reference numerals 1a and 3a denote engaging protrusions and engaging holes which are fitted to each other.
It plays a role in fixing the folded state, that is, the folded state of the cardboard box 201 (see FIG. 4). 11 is a handle hole, 1
2 is a ventilation hole.

Next, a procedure for folding up a cardboard box 201 with a lid from one piece of cardboard 101 will be described with reference to FIGS. First, as shown in FIG.
One of the pair of opposed side walls 2 is raised. Then, each of the two folded sleeve walls 3 connected to both side ends thereof is horizontally bent at right angles along the fold line B and folded inward into the box along the overlapped fold line C. I do.

Subsequently, as shown in FIGS. 4 and 5, the other opposing side wall 2 and the two-fold sleeve wall 3 connected thereto are also bent in the same manner as in the above-described step 2. At this time, when the two-fold sleeve wall 3 is folded into two, the already folded two-fold sleeve wall 3
And folded so as to cover it (see FIG. 5).

Then, the latching projections 3a provided on the two-fold sleeve wall 3 are fitted into the respective locking holes 1a provided on the bottom surface 1 by themselves, and each of the pair of two-fold sleeve walls 3 is formed. The folded state is fixed.

At the same time, the fitting piece 8 provided on one of the pair of folded sleeve walls 3 and 3 is erected in a cut-and-raised manner by itself, and the fitting piece 8 provided on the other folded sleeve wall 3 is provided. It is fitted into the notch 9 (see FIG. 5). Therefore, due to the external force exerted during the handling of the cardboard box 201, there is a possibility that the set of two folded sleeve walls 3 which have been overlapped so far shifts in a direction away from each other, and the shape of the box collapses. Can be eliminated.

The packaged article is placed in the box body folded in this way, and a set of lid pieces 4 and 4 are closed as shown in FIG. 6, and further, as shown in FIG. Then, the other opposing side walls 6 and 6 are raised, and the respective latching portions 7 a provided on the lid closing piece 7 are inserted into the corresponding insertion holes 5 of the lid piece 4. Assembly and packaging operations are completed very simply and quickly.

The other opposing side wall 6 extends along the part of the folded cardboard box 201 where the pair of two folded sleeve walls 3 and 3 overlap. Therefore, a total of five layers of corrugated cardboards overlap the opposing side wall 6.

Therefore, the pressure resistance of the cardboard box 201 is remarkably increased, and the risk of the cardboard box 201 being crushed is almost completely eliminated even when a large number of boxes are stacked or the boxes are slightly wet. Therefore, fruits and vegetables having a low resistance to a slight pressing force can be surely protected.

As described above, since the pressure resistance is extremely excellent, the required pressure resistance can be secured even if a thinner corrugated cardboard is used as the material, so that the material cost of the cardboard box is conspicuous. And save money.

Next, FIGS. 8 to 10 show a second embodiment in which the present invention is applied to a cardboard box (tray for strawberry packs) for packing four strawberry packs. The cardboard box 202 of this embodiment, which is shown in a folded state in FIG.
And it is folded up from one piece of cardboard 102 shown as a plan view and a perspective view in FIG.

The first difference from the first embodiment is as follows.
It is in the form of a tray without a lid. For that reason,
An inner wall 21 to be superposed on the inside of the opposing side wall 2 is connected to one opposing side wall 2 instead of the lid piece 4.

The second difference is that the lid closing piece 7 is omitted, and the hooking portions 22a of a pair of hooking pieces 22 connected to both ends of the upper edge of the other opposing side wall 6 are connected to one of the opposing side walls 2. Is engaged with the engaging hole 23 provided on the top surface.

The third difference is that, since the lid closing piece 7 is no longer necessary, when cutting the corrugated cardboard 102 from the raw corrugated cardboard, this portion which generates cut off material is effectively used.
The material of the cross-shaped middle partition 300 (see FIG. 10) that divides the inside of the cardboard box 202 into four sections is obtained by measuring the size from this part.

That is, in FIG. 8, two partition pieces 24 constituting the middle partition 300 can be dimensioned from a portion sandwiched between a pair of the engaging pieces 22 facing each other. A slit 25 for fitting the end of the partition piece 24 into the inner wall 21
Is provided.

It should be noted that one of the pair of folded sleeve walls 3 and 3 positioned opposite to each other is replaced with a fold C for superimposition, and has a wide cut 26. Then, when the cardboard box 202 is to be folded, as shown in FIG. 10, the two single sleeve walls 3A, 3A on both sides of the cut 26 are overlapped, and the two folded sleeve walls 3 are put thereon. I just need.

Next, FIGS. 11 and 12 show a third embodiment of the present invention.
An example is shown. The cardboard box 203 of this embodiment, which is folded up from one piece of cardboard 103 shown in FIG. 11 into the form shown in FIG. 12, is different from the second embodiment in that it is used as a "return box". It is as intended.
Therefore, as can be understood by comparing FIG. 11 with FIG. 10, the blocking piece 22 and the middle partition 300 which are in the way are not shown.

The width of the two-fold sleeve wall 3 is the same as that of the opposing side wall 6 to improve the strength and appearance of the box. On the upper edge of the opposing side wall 6, an inner wall (not shown) for covering the two-fold sleeve wall 3 like a conventional box shown in FIG.
May be continuously provided via a fold.

Like the cardboard boxes of the first and second embodiments, the cardboard box 203 also has excellent characteristics that are not required for conventional boxes of the same type, that is, the side wall faces outward during handling of the box. Even when an external force such as pushing is applied, there is no danger that the overlapped sleeve walls will be separated from each other, and therefore there is no risk of the box being deformed or crushed.

Since the corrugated cardboard is superposed on the opposing side wall 6 in five layers, the pressure resistance when the boxes are stacked in multiple stages is excellent.

[0033]

As is apparent from the above description, the cardboard box provided with the multi-layered wall according to the present invention has a sleeve wall connected to each side end of one of the opposing side walls, and the other opposing side wall. The above type has extremely excellent effects as listed below as compared with the conventional type. (A) When a force is applied to push the side walls outward during the handling of the box, it is possible to surely eliminate the risk that the set of sleeve walls in the overlapped state shifts and the shape of the box collapses. (B) The side wall portion where the sleeve walls are overlapped with each other has a corrugated cardboard of 5 pieces.
Since the layers are overlapped with each other, the pressure resistance of the box is extremely excellent, and the box can withstand multi-stacking sufficiently. (C) Even if the box is slightly wet, it can withstand external pressure. (D) Therefore, even fruits and vegetables that are easily damaged by a slight pressing force can be reliably protected. (E) Use of thinner corrugated cardboard is sufficient because the pressure resistance of the box is greatly increased, and material costs are correspondingly reduced. Can be saved.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment of the present invention, in a state where a cardboard box is developed into one cardboard.

FIG. 2 is a perspective view of the same cardboard.

FIG. 3 is a perspective view showing a state where the box is begun to be folded from a cardboard;

FIG. 4 is a perspective view showing a state in which the box is being folded up;

FIG. 5 is a diagram showing a state in which a fitting piece and a notch for fitting provided on each upper edge of the two folded sleeve walls are fitted to each other in order to fix a state in which two folded sleeve walls are overlapped. It is a perspective view.

FIG. 6 is a perspective view showing a state where one set of lid pieces is closed;

FIG. 7 is a perspective view of the cardboard box in which the lid is completely closed.

FIG. 8 is a view corresponding to FIG. 1, showing a second embodiment of the present invention.

FIG. 9 is a diagram corresponding to FIG. 2;

FIG. 10 is a perspective view of the folded cardboard box.

FIG. 11 is a view corresponding to FIG. 1, showing a third embodiment of the present invention.

FIG. 12 is a perspective view of the folded cardboard box according to the third embodiment.

FIG. 13 is a diagram corresponding to FIG. 1, showing a conventional example.

[Explanation of symbols]

 101-103 Corrugated cardboard 201-203 Corrugated cardboard box 300 Middle partition 1 Bottom surface 1a Hook hole 2 One opposing side wall 3 Two folded sleeve wall 3A Single sleeve wall 3a Hung protrusion 4 Cover piece 5 Insertion hole 6 The other opposing side wall 7 Lid closing piece 7a Hook part 8 Fitting piece 9 Fitting notch 11 Hand hole 12 Vent hole 21 Inner wall 22 Hook piece 23 Hook hole 24 Partition piece 25 Slit 26 Cut A, B, D, E Fold C Fold F Double fold a Notch b Parallel cut c Parallel fold 400 Corrugated cardboard 50 Bottom surface 51 Outer wall 52 Inner wall 53 Sleeve wall 54 Covering wall 55a Locking protrusion 55b Lock hole

Claims (5)

[Claims] 1. A cardboard box which is folded up into a box shape from one piece of cardboard, wherein the cardboard box has a middle rectangular area as a bottom face,
One opposed side wall is provided continuously, and two folded sleeve walls are vertically connected to each side end of the one opposed side wall and are folded in two in a vertical direction via a folding line for stacking. In each of the upper edges of a set of folded two-fold sleeve walls, a fitting piece and a notch for fitting are provided, and the other opposite side of the bottom face is overlapped with the two folded sleeve walls. A corrugated cardboard box provided with a multi-layer wall, characterized in that the cardboard box has a form in which the other opposing side wall is provided continuously. 2. A lid piece is continuously provided on each upper edge of one of the opposed side walls,
A hook portion of a lid closing piece connected to each upper edge of the other opposing side wall,
2. The cardboard box having a multi-layer wall according to claim 1, wherein the cardboard box is adapted to be inserted into an insertion hole provided in a lid piece. 3. A cardboard which is folded up from one piece of cardboard in a tray shape, wherein said cardboard has a middle rectangular area as a bottom surface and one of opposite sides thereof,
One opposed side wall is provided continuously, and two folded sleeve walls are vertically connected to each side end of the one opposed side wall and are folded in two in a vertical direction via a folding line for stacking. A fitting piece and a notch for fitting are provided on each upper edge of a pair of folded two-fold sleeve walls, and an inner wall is overlapped on each upper edge of one of the side walls. A pair of hooking pieces are continuously provided at both ends of the upper edge of the other opposing side wall connected to the other opposing side of the bottom surface. A cardboard box provided with a multi-layer wall, characterized in that the surface is provided with an engagement hole for engaging a retaining piece. 4. A part of a pair of cut pieces generated between a pair of engaging pieces when a corrugated cardboard is punched and cut from a raw corrugated cardboard is meshed in a cross shape, and the inside of the tray is formed. The cardboard box provided with a multi-layer wall according to claim 3, wherein the cardboard box is a middle partition for partitioning into four sections. 5. The multi-layer wall according to claim 1, wherein a single-sleeve wall is provided at each side end of one of the opposed side wall and the inner wall in place of the two-fold sleeve wall. Cardboard box.