JPH08175530A - Carton - Google Patents

Abstract

PURPOSE: To obtain a carton that is improved in strength at four corners of side walls without providing a cover, prevents a content from becoming stuffy, and can be stacked high without a possibility of collapsing. CONSTITUTION: A bottom piece 1 is provided in the center. End wall pieces 4, 5 and side wall pieces 2, 3 are connected to four peripheral edges of the bottom piece 1 to be respectively erectly folded through folding lines (a), (b), (c), (d) to form walls on four peripheral edges of the bottom piece. Reinforcing corner pieces 9, 10, 11, 12 are connected to both ends of the end wall pieces 4, 5 through folding lines to be folded along the inner corner parts connecting the end wall pieces 4, 5 to the side wall pieces 2, 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carton which has good air permeability and is capable of stacking in multiple stages by strengthening the four corners of the carton without using an additional reinforcing material.

[0002]

2. Description of the Related Art When fresh produce such as vegetables, fruits and flowers is subdivided and transported, these items are placed in a carton with a lid or a cardboard case, or a wooden box, toro box or basket shape without a lid. The boxes are used to store them in small portions.

[0003]

However, since the contents to be stored are perishables, when a carton with a lid or a cardboard case is used, the inside of the carton becomes damp and the products are damaged, and further, when the products are stacked, each stage is stacked. The carton is unstable because there are no slips on the front, back, left, and right, so there is a risk of collapse of the load, and it is best to use a thin box as much as possible to reduce costs, but in a thin box the strength of the four corners is Due to the shortage, the number of stacking stages is also limited. Furthermore, since it has a lid, the product cost is higher than that without a lid. Although it is possible to perforate the side surface of the carton in order to prevent this stuffiness, the perforation of this side surface further reduces the strength of the side wall portion of the carton. It is also possible to bond three- or quadrangular prismatic reinforcing columns to each corner of the carton or to make the side walls have a double structure, but these methods result in high cost.

Further, when using a lidless wooden box / toro box,
Since this has no lid, when stacking it, it is not possible to pack the items in a box and subdivide it, it is necessary to provide a lot of unnecessary space, it is inefficient, and when stacking high, As with the covered carton, there is no front, rear, left, or right anti-slip, which makes it unstable and limits the number of steps. In addition, when piled up, the bottom part of the upper box acts as a lid and the articles in the lower box must be steamed, which is unattractive and reduces the commercial value.

When a basket-like box is used, its shape is generally a cone type so that it can be stacked easily in space. Therefore, when articles are stored and stacked, the weight of the stored items is on the upper side. There is a drawback that it is not easy to attach documents necessary for distribution because the main body is a basket, the peripheral wall strength is weak, and the appearance is not good, and the commercial value is reduced.

In view of the drawbacks of the prior art, the present invention provides a carton in which the strength of the four corners of the side wall is improved without a lid so that the stored items do not get damp and can be piled up at a high level to prevent the collapse of loads. With the goal.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above-mentioned object, in which a bottom piece is arranged in the center, and the four edges of the bottom piece are folded and bent to form four edges of the bottom piece. A side wall piece and a side wall piece are continuously provided, and a reinforcing corner piece formed by folding along both end corners of the end side wall piece and the side wall piece is formed at both ends of the end side wall piece. The gist is that a projecting piece is provided on the upper end edge of the end side wall piece, and a locking hole for inserting the projecting piece on the lower stage side is formed in the bottom piece.

[0008]

[Operation] A side wall piece and an end side wall piece that are folded around the bottom piece through four folds to form a peripheral wall are continuously provided. As well as forming the holes, both ends of the side wall piece are folded to integrally form a reinforcing corner piece that is established along the inside of both ends of the side wall piece. By assembling the materials, the wall pieces of the carton will be reinforced naturally, and it is possible to stack them in multiple stages. Also, the protruding pieces of the upper and lower carton can be locked together simply by stacking the cartons in the locking holes. As a result, slippage at the time of stacking cartons can be prevented, which prevents the load from collapsing and stabilizes the stacking state. Further, since the upper end edge of the side wall piece is folded back inward for the purpose of reinforcement, this part serves as a ventilation hole when the carton is piled up, so that the stored items do not get damp and the side wall is also reinforced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The carton of the present invention will be described below with reference to the embodiments shown in the drawings. Use corrugated paperboard with predetermined thickness and strength, and if necessary, water repellency.Furthermore, according to the size of the box to be formed, the bottom piece and the four-sided side piece, etc. are each made through folds as shown in the figure. In the unfolded state, the carton material A is formed by cutting it into a desired shape.

In this carton material A, a rectangular or square bottom piece 1 having a predetermined size is arranged in the central portion, and side wall pieces 2, 3 are formed along the longitudinal side edge of the bottom piece 1 via folds a, b. Further, end side wall pieces 4 and 5 are continuously arranged along the edge of the bottom side so as to surround four rounds of the bottom piece 1 via folds c and d.

The side wall pieces 2 and 3 symmetrically arranged with the bottom piece 1 sandwiched between them are cut at a position slightly inside the left and right outer side surfaces from the outer end surface and shorter than the width of the side wall pieces 2 and 3. Groove 2
1 and 31 are engraved respectively, and these kerfs 21, 21 and 3
One or two parallel folds e, f between the bottoms of 1, 31
The folding piece 22 between the cut grooves 21 and 21 is bent inward from the fold e, and the folding piece 32 between the cut grooves 31 and 31 is bent inward from the fold f, respectively. The side wall pieces 2 and 3 are reinforced by adhering and tacking as necessary.

The end side wall pieces 4 and 5 are also formed symmetrically with the bottom piece 1 interposed therebetween, and the folding reinforcement pieces 7 and 8 are connected to the outer edges of the end side wall pieces 4 and 5 via folds g and h. At the same time, two folds c and g are arranged in parallel on the left and right sides of the short edge of the bottom piece 1.
And a flat U-shaped cut 4 at the center of each of d and h
Tongue pieces 41, 51, 71, 8 containing 0, 70, 50, 80
1 is formed. Engagement pieces 71, 81 are formed at both ends of the folding reinforcement pieces 7, 8 via folds i and j, respectively. Instead of the cuts 40 and 50, it is also possible to cut from the fold positions of the tongues 41 and 51 shown in FIGS. 1 and 2 to form slit-shaped locking holes.

Further, at the front end portions of the end side wall pieces 4 and 5 in the longitudinal direction, there are reinforced corner post pieces 9 through folds k, l, m and n, respectively.
10, 11, 12 are connected in series. Then, each of the reinforcing corner post pieces 9, 10, 11, 12 is provided with two or three folds parallel to the folds k, l, m, n, and 9a, 9 from each fold.
b, 10a, 10b, 11a, 11b, 12a, 12b
Is bent inward and the outermost fold is bent outward to make each of the reinforcing corner pillar pieces 9, 10, 11, 12 into a triangular or quadrangular corner prism. At this time, each reinforcing corner post piece 9, 1
Outermost pieces 9c, 10c, 11c, 12 of 0, 11, 12
c is adhered and fixed to the inner side surfaces of the end side wall pieces 4 and 5.

Therefore, in order to assemble the carton material A formed as described above, the carton material A is sandwiched between the upper and lower folding molds, and the folding pieces 22, 22 are folded from the folds e, f by the upper and lower folding molds. And 32, 32 are bent inwardly at a substantially right angle, and the reinforcing corner post pieces 9, 10, 11, 12 are bent inward through the folds k, l, m, n, and the folding reinforcement pieces 7, 8 are also formed. Fold inward through folds g and h, respectively.

Next, through the outer folds of the reinforcing corner post pieces 9, 10, 11, and 12, the pieces 9c, 10c, 11c, and 12c are bent outward while sandwiching the inner and outer surfaces thereof with guide bars. The pieces 9a, 10a, 11a, 12a are folded inward from the parallel folds outside the folds k, 1, m, n to form triangles, and the outer pieces 9c, 10c, 11 are formed.
C and 12c are adhered to the inner side surfaces of the machine pieces 4 and 5 to the end side to form a triangular reinforcing corner post piece. Next, the end side wall pieces 4 and 5 are bent from the folds c and d by using a bending die so as to face each other and raised. Next, using a folding die, the side walls 2 and 3 are bent from the folds a and b so as to be opposed to each other, and raised, and the inner surfaces of the side walls 2 and 3 are raised in advance to form triangular triangular corners. The outer surfaces of the pillar pieces 9, 10, 11, 12 are glued to be integrated.

By raising the end side wall pieces 4, 5 and the folding reinforcement pieces 7, 8 from the folds c, d, g, h, the folding reinforcement pieces 7, 8 cover the end portions of the end side wall pieces 4, 5. Further, the engaging pieces 72, 72 and 82, 82 connected to the both ends of the folding reinforcing pieces 7, 8 via i, j are respectively bent inward to form the reinforcing corner post pieces 9, 10, 11, 12. Piece 9a,
10a, 11a, 12a are overlaid and glued into one piece, and cuts 70, 80 are formed on the upper edges of the end side wall pieces 4, 5.
The tongue pieces 71, 81 separated from the folding reinforcing pieces 7, 8 are projected substantially vertically upward, and the bottom piece 1 is provided with cuts 40, 50 at positions facing the tongue pieces 71, 81. Notch holes H, H are formed. Therefore, when the cartons thus assembled are stacked vertically, the tongue pieces 71 and 81 of the lower carton are inserted and locked in the notch holes H formed in the bottom piece of the upper carton to prevent slipping, Prevent load collapse.

The above assembling order is one example, and the folding order may be different depending on the mold, guide, etc. used.

The embodiment shown in FIG. 2 is different from the first embodiment shown in FIG. 1 in that folds o and p are further arranged along the outer edges of the folding reinforcing pieces 7 and 8 in the longitudinal direction. 13,
It is a modification of the first embodiment in which 14 and the engaging pieces 15 and 16 are arranged in series, and the other structure is the same as that of the first embodiment. Then, fold the reinforcing folding pieces 13 and 14 inward from the folds o and o,
Further, the engaging pieces 15 and 16 are folded outward from the folds p and p, and if necessary, the engaging pieces 15 and 16 are glued to the inner side surfaces of the end side wall pieces 4 and 5 so as to be integrated with each other. It constitutes a reinforcing crosspiece. The order of assembling, the status of stacking when used, and the operation and effect are the same as those in the first embodiment of FIG.

FIG. 3 shows a different embodiment in which protruding anti-slip pieces are provided at both corners of the end side wall piece. Similar to the carton material A, this carton material B has a bottom piece 11 arranged in the central portion, and side wall pieces 2 and 3 are provided along the longitudinal side edges of the bottom piece 1 via folds a and b, and at the end edges. Along the folds c and d, the end side wall pieces 4 and 5 are continuously arranged so as to surround the four rounds of the bottom piece 1, respectively.

The side wall pieces 2 and 3 which are symmetrically arranged with the bottom piece 1 sandwiched therebetween are cut on both sides at positions slightly inside the left and right outer side surfaces and from the outer end surface to be shorter than the width of the side wall pieces 2 and 3. Groove 2
1 and 31 are engraved respectively, and these kerfs 21, 21 and 3
One or two parallel folds e, f between the bottoms of 1, 31
The folding piece 22 between the cut grooves 21 and 21 is bent inward from the fold e, and the folding piece 32 between the cut grooves 31 and 31 is bent inward from the fold f, respectively. The side wall pieces 2 and 3 are reinforced by adhering and tacking as necessary.

The end side wall pieces 4 and 5 are also formed symmetrically with the bottom piece 1 sandwiched therebetween, and folds k, l, m and n are respectively formed at the longitudinal end portions of the end side wall pieces 4 and 5. Reinforcing corner post pieces 9, 10, 11, 12 are arranged in series. Then, each of the reinforcing corner post pieces 9, 10, 11, 12 is provided with two or three folds parallel to the folds k, l, m, n, and 9 folds from each fold.
a, 9b, 10a, 10b, 11a, 11b, 12a,
By bending 12b inward and the outermost fold outward, the reinforcing corner post pieces 9, 10, 11, 12 are made into triangular or quadrangular corner prisms. At this time, the outermost pieces 9c, 10c, 11 of the reinforcing corner post pieces 9, 10, 11, 12
c and 12c are adhered and fixed to the inner side surfaces of the end side wall pieces 4 and 5.

The end side wall pieces 4, 5 and the reinforcing corner post pieces 9, 1
Projecting pieces 41, 41 and 51, 51 projecting from the outer end surface of the connecting portion through the folds k, 1, m, n with 0, 11, 12 are integrally formed. Folds k and l,
When the reinforcing corner post pieces 9, 10, 11, 12 are bent substantially at right angles through m and n, they are L-shaped or key-shaped.

Further, as shown in the drawing, locking holes 17, 18, 19, 20 are bored in the four corners of the bottom piece 1 for inserting and locking the L-shaped or key-shaped protruding pieces 41, 41, 51, 51, respectively. To do. The shapes of the locking holes 17, 18, 19, 20 are triangular as shown in the drawing, and are not limited as long as the L-shaped or key-shaped engaging pieces can be inserted properly.

In order to assemble the carton material B thus formed, the carton material B is first sandwiched between the upper and lower folding molds, and the folding pieces 2 are folded from the folds e and f by the upper and lower folding molds.
2, 22 and 32, 32 are bent inwardly at a substantially right angle, and the reinforcing corner post pieces 9, 1 are inserted through the folds k, 1, m, n.
Bend 0, 11, and 12 inward and fold.

Next, the pieces 9c, 10c, 11c, and 12c are bent outward by sandwiching the inner and outer surfaces of the pieces 9c, 10c, 11c, and 12c with guide bars through the outer folds of the reinforcing corner post pieces 9, 10, 11, and 12, respectively. The pieces 9a, 10a, 11a, 11c are bent inward from the parallel folds outside the folds k, 1, m, n to form triangles, and the outer pieces 9c, 10c, 11c are formed.
C and 12c are adhered to the inner side surfaces of the machine pieces 4 and 5 to the end side to form a triangular reinforcing corner post piece. Next, the end side wall pieces 4 and 5 are bent from the folds c and d by using a bending die so as to face each other and raised. Next, using a folding die, the side walls 2 and 3 are bent from the folds a and b so as to be opposed to each other, and raised, and the inner surfaces of the side walls 2 and 3 are raised in advance to form triangular triangular corners. The outer surfaces of the pillar pieces 9, 10, 11, 12 are glued to be integrated.

As a result, the upper surface is fully opened, and L-shaped or key-shaped protrusions 41, 41, 51, and
51 is projected, and the carton is formed with locking holes for inserting the projecting pieces at the four corners of the bottom surface. Therefore, by simply stacking this carton in the vertical direction, the projecting piece on the lower stage side is inserted and locked in the locking hole on the upper side surface, and the stacking carton does not slip and the load collapse does not occur, Moreover, since the four corners of the carton are reinforced, it can be stacked in multiple stages. In this embodiment as well, the assembly order is not limited. Further, the outer short edges of the end side wall pieces 4 and 5 are folded inwardly without cutting between the projecting pieces 41 and 41 at both ends and between the 51 and 51 as shown in the drawing. It can also be reinforced.

In the fourth embodiment shown in FIG. 4, the side wall pieces 2, 3 are provided.
The third embodiment is exactly the same as the third embodiment except that the ventilation holes 2H and 3H are drilled in the second embodiment. Therefore, detailed description thereof will be omitted.

[0028]

In the carton of the first aspect of the present invention, since the reinforcing corner pieces that are erected along the inner sides of both ends of the end side wall piece are integrally formed by folding through the folds at both ends of the end side wall, respectively. The carton wall pieces are naturally reinforced by assembling the carton material without using the attached reinforcing material, which is advantageous in that the carton can be stacked in multiple stages. In the carton of the second invention, the lower side projecting pieces are inserted and locked in the locking holes of the upper side bottom piece only by stacking the cartons vertically, so that slippage is prevented and the stacking state is stable. It does not collapse.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a first embodiment.

FIG. 2 is an exploded perspective view of a second embodiment.

FIG. 3 is an exploded perspective view of a third embodiment.

FIG. 4 is an exploded perspective view of a fourth embodiment.

FIG. 5 is an external view of the assembly of the first embodiment.

FIG. 6 is an external view of the assembly of the second embodiment.

FIG. 7 is an external view of the assembly of the third embodiment.

FIG. 8 is an external view of the assembly of the fourth embodiment.

[Explanation of symbols]

 1 Bottom piece 2 Side wall piece 21 Cutting groove 22 Folding piece 3 Side wall piece 31 Cutting groove 32 Folding piece 4 End side wall piece 41 Tongue piece 5 End side wall piece 51 Tongue piece 71 Tongue piece A Carton material B Carton material a Fold

Claims (2)

[Claims] 1. A bottom piece is arranged in the center, and four side walls are provided with end side wall pieces and side wall pieces which are folded up at four sides thereof to form four side walls of the bottom piece. A carton characterized in that a reinforcing corner piece, which is formed by folding the end side wall piece and the side wall piece along the inner corner of the side wall piece, is connected in series. 2. A bottom piece is arranged in the center, and end wall pieces and side wall pieces constituting the four circumference walls of the bottom piece are continuously provided by folding the four pieces around the bottom piece, and at the upper edge of the end side wall piece. The carton according to claim 1, wherein a protrusion is provided, and a locking hole for inserting the lower protrusion is formed in the bottom piece.