JPH1035642A - Corrugated cardboard case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a corrugated cardboard case which can be compactly collapsed after use and easily transferred. SOLUTION: An unfolded corrugated cardboard 10 that a used corrugated cardboard case is unfolded, can be compactly collapsed. Folding parts 20 composed of a pair of recessed ruled lines in advance in addition to the folding lines for assembling in the corrugated cardboard case are formed in the unfolded corrugated cardboard 10. The innermost side part is formed as the first flap when folded and the part folded on the upper face is formed as the second flap and the part folded at the underside of the first flap is the third flap and the fourth and the fifth flap... are formed in the same way. The folding parts 20 are provided between respective flaps. The width W of the folding parts 20 is wider than the following formula, W=A(n+1)mm, where Amm is the thickness of the unfolded corrugated cardboard 10 and n is the folded number.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cardboard box used for protecting products and the like, and to a cardboard box which can be folded compactly after use to facilitate handling.

[0002]

2. Description of the Related Art As is well known, a corrugated cardboard box is formed into a box shape by using corrugated paper having a flat liner attached to both sides or one side of a corrugated core paper. Strength. For this reason, cardboard boxes have been used as a means of protecting products during transportation.
Widely used for storage.

[0003] Further, cardboard boxes are manufactured according to the shapes and sizes of various commodities, and their assembling and dimensions are also various. In addition, the cardboard boxes are usually disposed of as unnecessary after they have been delivered.

[0004]

However, the conventional cardboard box has the following problems. In other words, when a used cardboard box is to be carried out as a three-dimensional empty box, the transfer efficiency is extremely low, and the transfer cost is extremely high. Further, as described above, it is difficult to compact a large number of cardboard boxes of various sizes even if the cardboard boxes are unfolded and folded in order to improve the transport efficiency.

In particular, in the folding operation, since the cardboard box has a structure having corrugated core paper as described above, it is difficult to bend accurately at a desired position.
Further, even when folded, it can be held only in a state of being greatly expanded by the repulsive force.

Further, for example, when the above-mentioned product is a building article or the like used in a construction site of a high-rise apartment, how to efficiently carry out a used cardboard box is a very big problem. However, conventionally, as described above, the cardboard box could not be made very compact, and the unloading operation required a large number of man-hours.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a cardboard box which can be compactly folded after use and can be easily carried out.

[0008]

According to the first aspect of the present invention, there is provided a cardboard box in which an expanded cardboard box in which a used cardboard box is unfolded is made compactly foldable. Separately, a folding portion composed of a pair of concave ruled lines for folding is provided in advance, and the innermost portion when folded is the first portion.
Each of the above-mentioned pieces is referred to as a second piece, a portion folded below the first piece is referred to as a second piece, and then a portion folded below the first piece is referred to as a third piece. And the width W of each folded portion is not less than W = A (n + 1) mm, where A is the thickness of the expanded cardboard paper and n is the number of times of folding. It is in the cardboard box.

The most remarkable point in the present invention is that the folded cardboard paper is provided with the folded portions in advance, and each folded portion is composed of a pair of concave ruled lines, and each of the folded portions has a width W. Is A (n + 1) mm
That is all.

In the above-mentioned folded portion, a folded piece rebounds if only one concave ruled line is provided. Therefore, a pair of concave ruled lines is provided. The width W of the concave ruled line is A (n + 1).
In the case where the width of the folded part is smaller than the total thickness of the folded piece, the folded piece rebounds and swells. On the other hand, since the upper limit of the width of the folded portion directly affects the thickness of the entire expanded cardboard paper after folding, the above A (n
+1) It is more preferable to be closer to mm.

The pair of concave ruled lines constituting the folded portion are formed by denting the inner surface (folding side) of the cardboard paper into a concave shape. Thereby, the expanded corrugated cardboard can be easily folded along the concave ruled line regardless of the presence of the corrugated core paper constituting the corrugated paper.

It is necessary that the width of each of the above-mentioned pieces (interval between adjacent folded portions) in the expanded cardboard paper is set to be wider than the piece located inside when folded. In particular, the width of each piece needs to be the width of the piece to be folded immediately before, plus the thickness of the expanded cardboard paper, so that there is no rebound when folded, and there are few gaps when folded. It can be made compact.

Next, the operation of the present invention will be described. In the cardboard box of the present invention, the folded portion is provided in advance on the expanded cardboard paper. Therefore, after its use, it can be unfolded and easily folded compactly.

That is, the used cardboard box is first developed on a flat developed cardboard paper by removing the adhesive, adhesive tape, stapler and the like held in the box shape. Next, folding is performed along the folded portion sequentially from the innermost first piece. As a result, the expanded cardboard paper is folded compactly by successively folding the first piece and the second piece.

[0015] Further, as described above, the folding portion has
It has a width of (n + 1) mm or more. Therefore, the pieces folded in order are folded neatly without being repelled by their thickness. Therefore, the cardboard box of the present invention can be folded very compactly after use, and the work of carrying out the cardboard box can be facilitated.

[0016] For a plurality of types of cardboard boxes,
By setting the formation positions of the above-mentioned folded portions to the optimum positions in advance, even if the boxes are different in size, they can be folded to substantially the same width. In other words, when handling a plurality of types of cardboard boxes having different sizes of expanded cardboard paper, it is preferable that the width of the outermost piece when each expanded cardboard paper is folded is set to be the same. This makes it possible to keep the width of the folded cardboard paper constant even if the number of times of folding of the expanded cardboard paper is different. Therefore, in this case, the convenience of carrying out and transporting a large number of used cardboard boxes can be further improved.

Next, as in the second aspect of the present invention, the width W of the folded portion is preferably in the range of A (n + 1) to A (n + 2) mm. If it is less than A (n + 1) mm, there is a problem that each piece rebounds when the expanded cardboard paper is folded as described above. On the other hand, A (n + 2)
If it exceeds mm, the gap between the respective pieces when folded becomes large, which is a countermeasure against the purpose of compactness.

Further, as in the third aspect of the present invention, the used cardboard box is not merely compact, but is easy to carry after folding. That is, this is a cardboard box in which an expanded cardboard box obtained by unpacking a used cardboard box can be compactly folded. When the cardboard box is folded, it forms a hand-down state consisting of a bottom piece and both side pieces. As described above, on both sides of the bottom piece, a concave ruled line for the bottom piece is provided separately from the folding line for assembling the cardboard box, and on the outer side of the concave ruled line for the bottom piece, a top is formed at the time of folding. There is a cardboard box characterized in that a folded portion composed of a pair of concave ruled lines is provided separately from the above-mentioned folded line.

The most remarkable point in the present invention is that the expanded cardboard paper is configured to form a hand-down state consisting of a bottom piece and both side pieces when folded. In order to realize this hand-down state, the expanded corrugated cardboard is provided with the concave ruled line for the bottom piece and the folded portion in advance.

In the case of the present invention, a used cardboard box folded compactly can be handled in a hand-down state of a substantially triangular or trapezoidal shape, so that the carrying out operation can be facilitated. In addition, the above-mentioned hand-hanging state is, for example, tied up with a packing string to form a hand-held luggage. Further, in the state folded in the hand-down state, another small cardboard paper piece or the like is placed between the two side pieces, so that the folded cardboard box can be used as a carrying case (FIG. 8). Therefore, the work of unloading a plurality of cardboard boxes can be further facilitated.

Further, as in the invention of claim 4, it is preferable that cut lines for forming a handle hole to be penetrated at the time of folding are provided on both sides of the top. This makes it easier to carry the folded cardboard box (FIGS. 5 and 8).

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. 1 shows a cardboard box according to an embodiment of the present invention.
This will be described with reference to FIG. As shown in FIG. 2, the cardboard box 1 of this embodiment is for protecting relatively long products such as doors, interior materials, desks, entrance storage boxes, etc., and is a type in which a pair of upper and lower opening boxes are combined. belongs to. After use, each of the upper and lower cardboard boxes 1 is peeled off from the adhesive tape held in a box shape, and is developed to form a developed cardboard paper 10 (FIG. 1).

As shown in FIG. 1, the unfolded corrugated cardboard 10 is provided with a folded portion 20 consisting of a pair of folded concave ruled lines 2 separately from the folding line 8 of the cardboard box. Also, as shown in FIGS. 1 and 4, the innermost part when folded is the first piece 11, the part folded on the upper surface thereof is the second piece 12, and then the part folded below the first piece 11. To the third piece 13, and similarly to the fourth piece
Each of the pieces 11, the fifth piece 15, and the sixth piece 16
The folded portion 20 is provided between the positions .about.16.

The width W (W _{1 to} W ₅ (FIG. 1)) of the folded portion 20 is W = A (n + 1) mm or more, where A is the thickness of the expanded cardboard paper 10 and n is the number of times of folding. Specifically, the thickness of expanded corrugated paper 10 of the present embodiment is a 5 mm, the value of W1 to _W-5, respectively, W
₁ = 10 mm, W ₂ = 15 mm, W ₃ = 20 mm, W ₄
= 25 mm and W ₅ = 30 mm. That is, in this example, the width W of each folded portion 20 was set to be the same as the total thickness of the pieces folded inside.

As shown in FIG. 3, the expanded corrugated paper 10 is so-called corrugated paper having a structure in which liners 19 are attached to both surfaces of a corrugated core paper 18. As shown in FIG. 3, the folded portion 20 is composed of a pair of concave ruled lines 2. Each concave ruled line 2 is provided with a liner 19 on the inner surface side (the inner side when folded) of the expanded cardboard paper 10. It is formed by making it concave.

As shown in FIGS. 1 and 4, each of the pieces 11 to 16 of the expanded corrugated cardboard 10 is wider than the width of the piece located inside. In particular,
The second piece 12 to the fifth piece 15 are sequentially set wider by the thickness of the developed corrugated paper 10. Also, the first piece 11
Is sufficiently narrower than the width of the second piece 12, and the sixth piece 16
Is the same width as the fifth piece 15.

Next, the operation of this embodiment will be described.
As described above, the cardboard box 1 of the present embodiment is provided with the folded portion 20 in the developed cardboard paper 10 in advance. Therefore, after using the cardboard box 1, unfold it,
It can be easily folded compactly.

That is, as shown in FIG. 1, the used cardboard box 1 is first expanded on a flat expanded cardboard paper 10. Next, as shown in FIG.
The pieces 11 are sequentially folded along the folding section 20. As a result, the expanded cardboard paper 10 becomes the first piece 1
The first and second pieces 12 and the respective pieces 11 to 116 are successively folded to be compactly folded.

As described above, each of the folded portions 20 is set to have the same total thickness of the pieces folded inside thereof. Therefore, each of the pieces 11 to 16 that have been sequentially folded is finely folded without being repelled by its thickness. Therefore, as shown in FIG. 4, the cardboard box 1 of this example can be folded very compactly after use, and the work of carrying out the cardboard box can be facilitated.

Embodiment 2 In this embodiment, one of the procedures for determining the width W and the arrangement position of the folded portion 20 of the expanded cardboard paper 10 in Embodiment 1 will be described. First, unfold cardboard paper 10
Has a thickness of 5 mm and a total length of 2300 mm.
The case of compact folding to a width of 0 mm will be described as an example.

In order to fold the expanded cardboard paper 10 most compactly, it is preferable that no extra space is formed between the folded pieces. First, the width of each piece to be folded is determined. That is, referring to FIG. 1, the sixth piece 16, which is the outermost portion, has a desired size of 380 mm. Next, since the fifth piece 15 located inside is also an outer part located on the opposite side to the sixth piece 16, this is also set to the desired dimension of 380 mm.

Next, the fourth piece 14 folded inside the fifth piece 15 has a size reduced by the thickness of the developed corrugated paper 10, that is, 375 mm. Next, the third piece 13
Is further reduced from the width of the fourth piece 14 by the thickness of the developed cardboard paper 10 to 370 mm. Similarly, the second piece 1
2 is 365 mm.

As described above, by making each piece narrower than the outer piece by the thickness of the expanded corrugated paper 10, the gap in the width direction when folded can be eliminated. The innermost first piece 11 is automatically determined by determining the width of the folded portion 20 described below.

That is, the folded portion 2 between the pieces 11 to 16
First, the width of the fold 2 between the first piece 11 and the second piece
Determined from the width of 0. It is desirable that the width be set so that each piece does not rebound and expand when folded, and a gap between the pieces does not open. Therefore, the width of the folded portion 20 between the first piece 11 and the second piece 12 is set to 10 mm which is the total thickness of both pieces.

Next, the folded portion 20 between the second piece 12 and the third piece 13 is set to the total thickness of the first piece 11 to the third piece 13, that is, 15 mm. Similarly, outwardly, the width of each folded portion 20 is set to 20 mm and 25 m.
m, 30 mm.

Next, as described above, by determining the width of the second piece 12 to the sixth piece 16 and the width of each folded portion 20,
The width of the first piece 11 is calculated by adding the total width of these to 2300 mm
Is determined to be 330 mm subtracted from Thus, if the desired folding size is determined. The optimum arrangement position and the width of the folded portion 20 can be easily determined mechanically.

Also, for example, when it is desired to fold a developed cardboard paper having a total length of 2400 mm to 500 mm, the same procedure is used to divide the cardboard paper into five pieces, and the width of each piece is 500 mm and 500 mm, respectively, from the outside. ,
495mm, 490mm, 385mm, width of each folded part is 10mm, 15mm, 20m from inside
It is very easily understood that the optimum values of m and 25 mm are optimal.

Embodiment 3 As shown in FIGS. 5 and 8, a cardboard box 7 according to this embodiment is a cardboard paper 70 obtained by unpacking a used cardboard box.
Is a cardboard box that can be folded compactly and is easy to carry after folding.

As shown in FIG. 5 and FIG. 8, when the folded cardboard paper 70 is folded, the bottom piece 71 and the side pieces 7 are folded.
In order to form a hand-down state composed of 2, 73 (FIG. 8), concave ruled lines 25 for the bottom piece are provided on both sides of the bottom piece 71 in addition to the assembly folding line 8 of the cardboard box.

Further, as shown in FIG. 5, a top portion 74 (FIG. 8) is provided outside the concave ruled line 25 for the bottom piece when folded.
Is formed separately from the folding line 8 for assembling the cardboard box. Also, on both sides of the top 74, there are provided oblong cut lines 75 for forming a handle hole to be penetrated at the time of folding (FIG. 5). Others are the same as the first embodiment.

Next, the operation of this embodiment will be described. In the cardboard box of this embodiment, as shown in FIG. 5, two concave ruled lines 25 for bottom pieces and a folded portion 20 are provided in advance on a developed cardboard paper 70. Therefore, the expanded cardboard paper 70
As shown in FIG. 8, it can be folded in a hand-down state. That is, both end pieces 721, 73 of the developed cardboard paper 70
1 are folded inward, and both end pieces 721, 731
Together with the intermediate pieces 722 and 732 between the bottom piece 71 and the bottom piece 71, both side pieces 72 and 73 are formed.

Next, both side pieces 72 and 73 are bent upward from the left and right around the concave ruled line 25 for the bottom piece.
Thus, as shown in FIG. 8, the hand-down state can be easily created. Further, the handle hole can be easily formed by bending the inside thereof along the handle hole forming cut line 75 provided near the top portion 74. Therefore, in this embodiment, the compact expanded cardboard paper 70 can be easily carried with one hand.

In this embodiment, as shown in FIGS. 6 and 7, the two types of expanded cardboard paper 61 and 62 of the separately used cardboard box can be handled together with the expanded cardboard paper 70 described above. That is, the folded portion 20 provided with the expanded cardboard papers 61 and 62 at the respective centers thereof.
Fold it into two folded states. As a result, the width of the expanded cardboard paper 61, 62 becomes equal to the width of the expanded cardboard paper 70.
Are shorter than the widths of both side pieces 72 and 73 of the first embodiment.

Next, the folded unfolded cardboard paper 61, 62 is sandwiched between both side pieces 72, 73 of the unfolded unfolded cardboard paper 70. Thereby, the expanded corrugated paper 70, 61, 62 can be easily handled in a compact state.

As described above, in this embodiment, a plurality of cardboard boxes can be compactly combined on the largest expanded cardboard paper 70. The expanded cardboard paper 70
By changing the width of the bottom piece 71 in the above, the amount of the expanded corrugated cardboard that can be sandwiched together can also be adjusted.

[0046]

According to the present invention, it is possible to provide a cardboard box which can be compactly folded after use and can be easily carried out.

[Brief description of the drawings]

FIG. 1 is a development view of a development cardboard paper in a first embodiment.

FIG. 2 is a perspective view of a cardboard box according to the first embodiment.

FIG. 3 is an explanatory diagram showing a structure of a folded portion in the first embodiment.

FIG. 4 is an explanatory diagram showing a state in which the expanded cardboard paper is folded in the first embodiment.

FIG. 5 is a development view of a development cardboard paper in the third embodiment.

FIG. 6 is a development view of another developed corrugated cardboard according to the third embodiment.

FIG. 7 is a development view of another developed corrugated cardboard according to the third embodiment.

FIG. 8 is an explanatory diagram showing a state in which the expanded cardboard paper is folded in a hand-down state in the third embodiment.

[Explanation of symbols]

 1,7. . . Cardboard box, 10, 70. . . Expanded cardboard paper, 11-16. . . 1st to 16th pieces; . . Recessed ruled line, 20. . . Folding part, 25. . . 70. Concave ruled line for bottom piece . . Bottom piece, 72, 73. . . 7. bilateral pieces, . . Assembly broken line,

Claims (4)

[Claims] 1. A cardboard box in which a used cardboard box in which a used cardboard box is unfolded is made compactly foldable. A folded portion composed of a concave ruled line is provided, the innermost portion when folded is the first piece, the portion folded on the upper surface thereof is the second piece, and the portion folded below the first piece is the second piece. .., And the same applies to the fourth piece, the fifth piece,..., The folds are provided between the pieces, and the width W of each fold corresponds to the thickness of the developed cardboard paper Amm, when the number of times of folding is n, W
= A (n + 1) mm or more. 2. The cardboard box according to claim 1, wherein the width W of the folded portion is in a range of A (n + 1) to A (n + 2) mm. 3. A cardboard box in which a used cardboard box in which a used cardboard box is unfolded is made compactly foldable, wherein the unfolded cardboard paper has a bottom piece and side pieces when folded. In order to form a state, a concave crease for the bottom piece is provided on both sides of the bottom piece in addition to the folding line for assembling the cardboard box, and a top is formed outside the concave crease for the bottom piece when folded. A cardboard box characterized in that a folded portion formed of a pair of concave ruled lines is provided separately from the above-mentioned folded line. 4. The cardboard box according to claim 3, wherein cut lines for forming handle holes are provided on both sides of the top portion so as to penetrate when folded.