JP2011201594A - Corrugated cardboard sheet and article storage body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothen the outer surface or the inner surface of a corrugated cardboard box by effectively reducing a level difference caused by overlapping of corrugated cardboard sheets.SOLUTION: A top surface 1a and a paste margin 1m of the corrugated cardboard sheet are overlapped at least at a part of the corrugated cardboard sheet assembled into the corrugated cardboard box. A thin-walled section 1n is arranged in the top surface 1a and formed by crushing an end of the top surface 1a in a thickness direction. A thin-walled section 1o is arranged in the paste margin 1m and formed by crushing an end of the paste margin 1m in a thickness direction opposite to the thin-walled section 1n. These thin-walled sections 1n, 1o are overlapped each other when the corrugated cardboard sheet is assembled to the corrugated cardboard box.

Description

  The present invention relates to a cardboard sheet and an article container using the same.

  Cardboard boxes are frequently used as storage boxes for storing articles when goods (products) distributed in the market are conveyed. The cardboard box is assembled by folding a flat cardboard sheet, and articles are accommodated in the internal space. Also, as in Patent Documents 1, 2, and 3, the corrugated cardboard box is designed to make it easy to open the packaging box so that the hands are not cut at the time of opening, or the flaps are easily engaged with each other. For this reason, some of the outer flaps of the cardboard box are crushed to provide thin portions on the outer flaps. In general, the thin portion is formed by punching a cardboard sheet from a sheet and pressing the sheet at one time from one direction.

JP 2002-370728 A Japanese Patent No. 4230853 JP 2002-019770 A

  By the way, when a cardboard box is assembled by folding the cardboard sheets, there are portions where the cardboard sheets overlap. For example, when corrugated sheets having the same thickness overlap on a part of a surface of the corrugated cardboard box, there are only one corrugated sheet and two overlapping portions on the surface. As a result, a step is generated on the outer or inner surface of the cardboard box (see FIG. 5). Also, for example, even if there are thin portions in the flap, if all the thin portions were formed by crushing the sheet from the same direction, it was crushed at the part where the cardboard sheets overlap in the assembled cardboard box The parts overlap in the same direction. As a result, a step is also generated on the outer or inner surface of the cardboard box. When such a level difference exists, various problems arise in handling the cardboard box. For example, when there are steps on the upper and lower (top and bottom) outer surfaces of the cardboard box, when the cardboard boxes are stacked in a plurality of stages, the stacked cardboard boxes are not horizontal, and are inclined and easily collapsed toward the upper stage. Further, if there is a step on the outer surface of the cardboard box, the cut surface of the corrugated cardboard sheet is exposed or the side surface is swollen, leading to a decrease in appearance. At the same time, unnatural catching is likely to occur during loading. A plurality of cardboard boxes are stacked between the pallets. However, when the cardboard boxes are caught when the cardboard boxes are pushed and pulled to adjust the stacking stage, the cardboard boxes may move unintentionally. Furthermore, if there is a step on the inner surface of the cardboard box, a part of the article, for example, a product label, a bottle mouth, a can mouth, a decorative box, etc., when or after the article such as a bottle, can, bottle is accommodated in the cardboard box. May be caught on the inner surface of the cardboard box.

  Therefore, an object of the present invention is to alleviate the level difference caused by the overlapping of the cardboard sheets and to smooth the outer surface or the inner surface of the cardboard box.

  In order to solve this problem, the first invention provides a corrugated cardboard sheet that is assembled and used as a cardboard box, and has a pair of sheet portions, a first thin part, and a second thin part. The pair of sheet portions are at least partially overlapped in a state assembled in a cardboard box. The first thin portion is provided on one of the pair of sheet portions and is formed by crushing an end portion of the one sheet portion in the thickness direction. The second thin portion is provided on the other of the pair of sheet portions, and is formed by crushing an end portion of the other sheet portion in a thickness direction opposite to the first thin portion. The first thin portion and the second thin portion are overlapped with each other when assembled in the cardboard box.

  Here, in the first invention, one seat portion is a first main surface having an open end, and the other seat portion is opposed to the first main surface in a state in which the cardboard box is assembled. It may be a glue margin connected to a second main surface different from the main surface. Further, the pair of sheet portions may be a pair of flaps.

  2nd invention provides the goods container which has a cardboard box and the goods accommodated in this cardboard box. The cardboard box includes a pair of sheet portions that overlap at least partially, a first thin portion provided in one of the pair of seat portions, and a first thin portion provided in the other of the pair of sheet portions and overlapping the first thin portion. 2 thin portions. The first thin portion is formed by crushing the end portion of one sheet portion in the thickness direction, and the second thin portion is the end portion of the other sheet portion opposite to the first thin portion. It is formed by crushing in the thickness direction.

  Here, in the second invention, it is preferable that the thickness of the portion where the first thin portion and the second thin portion overlap is substantially the same as the thickness of the other portion in the pair of sheet portions. Moreover, a pair of sheet | seat site | part may be latched mutually in the 1st thin part and the 2nd thin part.

  In the second invention, the first thin portion and the second thin portion may be provided on the upper surface or the lower surface of the cardboard box. In this case, the cardboard boxes containing the articles may be stacked in a plurality of stages. Moreover, the 1st thin part and the 2nd thin part may be provided in the side surface of the cardboard box.

  According to the first or second aspect of the invention, the first thin portion and the second thin portion are provided by crushing the end portion at a portion where the cardboard sheets overlap. Since the direction in which these thin portions are crushed is opposite, the thickness when superimposed is effectively reduced. Thereby, a level | step difference is relieve | moderated and the outer surface or inner surface of a cardboard box can be smoothed.

Corrugated sheet development Cross-sectional view of main parts of cardboard sheet Explanatory drawing of an example of formation process of thin part Cross section of the main part of the cardboard box Cross-sectional view of the main parts of a cardboard box in a comparative example Perspective view of the article container in the stacked state

  FIG. 1 is a development view of a die-cut corrugated cardboard sheet according to the present embodiment, showing a state in which the corrugated cardboard sheet is viewed from the inner surface. The cardboard sheet 1 is used as a cardboard box for accommodating articles such as bottles, cans and bottles by assembling and three-dimensionalizing the cardboard sheet 1. The corrugated cardboard sheet 1 is composed of sheet portions such as four main surfaces 1a to 1d, flaps 1e to 1l, and adhesive margin 1m that define a basic shape as a cardboard box. Hereinafter, for convenience of explanation, the main surface 1a is the upper surface, the main surface 1b is the left surface, the main surface 1c is the lower surface, the main surface 1d is the right surface, the flaps 1e to 1h are the front side, and the flaps 1i to 1l are the rear side. Further, in the corrugated cardboard sheet 1, when the corrugated cardboard sheet 1 is assembled, the surface on the side that accommodates the article is defined as the inner surface, and the outer surface is defined as the outer surface.

  The right end of the upper surface 1a is an open end to which nothing is connected, and the left end is connected in a horizontal row in the order of the left surface 1b, the lower surface 1c, and the right surface 1d toward the left. A margin 1m is connected to the left side of the right surface 1d. In the state assembled in the cardboard box, the adhesive margin 1m overlaps at least a part of the upper surface 1a, specifically, the right end portion of the upper surface 1a. On the other hand, the front flaps 1e to 1h are connected to the lower sides of the main surfaces 1a to 1d, respectively, and the rear flaps 1i to 1l are connected to the upper sides thereof. In the assembled state of the cardboard box, the flaps 1f and 1h extend so as to face each other, and these become a pair of inner flaps on the front side, and the flaps 1e and 1g also extend so as to face each other. It becomes the outside flap. On the other hand, in the assembled state of the cardboard box, the flaps 1j and 1l extend so as to face each other, and these become a pair of inner flaps on the rear side, and the flaps 1i and 1k also extend so as to face each other. A pair of outer flaps on the rear side.

  As shown by the hatched area in the figure, a thin portion 1n is provided on a part of the upper surface 1a. The thin portion 1n has a predetermined width starting from the right end portion of the upper surface 1a, and extends over substantially the entire end portion. As shown in FIG. 2, the thin portion 1n formed on the upper surface 1a is formed by crushing the cardboard sheet in the thickness direction indicated by the arrow, that is, downward. The outer surface (the lower side in FIG. 2) of the thin portion 1n is substantially flush with that of the upper surface 1a (excluding the thin portion 1n), but the inner surface (the upper side in FIG. 2) of the thin portion 1n is the upper surface 1a (the thin portion). 1) (except 1n) and is flattened toward the end. When the thickness of the upper surface 1a excluding the thin portion 1n is W1, and the thickness of the thin portion 1n is W2, the thickness W2 is smaller than the thickness W1, and is about ½ of W1 as an example.

  On the other hand, as shown by the hatched area similar to the thin portion 1n in FIG. 1, a thin portion 1o is provided in a part of the adhesive margin 1m overlapping the upper surface 1a. The thin portion 1o has a predetermined width starting from the left end portion of the adhesive margin 1m, and extends over substantially the entire area of the left end portion. As shown in FIG. 2, the thin portion 1o is formed by crushing the cardboard sheet in the thickness direction (arrow direction) opposite to the thin portion 1n, that is, upward. The outer surface of the thin portion 1o (the lower side in FIG. 2) is substantially flush with that of the adhesive margin 1m (excluding the thin portion 1o), but the inner surface (the upper side in FIG. 2) of the thin portion 1o has an adhesive margin of 1m ( It is depressed from that of the thin portion 1o) and extends in a planar shape toward the end portion. When the thickness of the adhesive margin 1m excluding the thin portion 1o is W1, and the thickness of the thin portion 1o is W2, the thickness W2 is smaller than the thickness W1, and is about ½ of W1 as an example.

  FIGS. 3A and 3B are explanatory diagrams of an example of a process for forming the thin portions 1n and 1o. FIG. 5A shows an example of a process for forming one thin portion (for example, the thin portion 1n). An elastic member 6 such as resin, cork, or rubber is disposed on one side surface of the punching blade 5 that cuts the cardboard sheet 1. The lower surface of the elastic member 6 is inclined obliquely with the cutting blade 5 side as the lowest point. Moreover, the protrusion part 8 which consists of a resin sheet, G tape, etc. is attached to the base 7 side. The upper surface of the protrusion 8 is inclined obliquely with the cutting blade 5 side as the uppermost point. When cutting the corrugated cardboard sheet 1, the upper surface of the corrugated cardboard sheet 1 is pressed by the lowering of the elastic member 6 interlocked with the punching blade 5, whereby the core of the corrugated cardboard sheet 1 is crushed in the thickness direction, and one thin part 1n is formed. FIG. 5B shows an example of a process for forming the other thin part (for example, the thin part 1o). The elastic member 6 and the protruding portion 8 described above are arranged on both side surfaces of a portion of the base 7 that faces the punched blade 5. When cutting the corrugated cardboard sheet 1, the lower surface of the corrugated cardboard sheet 1 is pressed against the elastic member 6 by the lowering of the cutting blade 5, whereby the core of the corrugated cardboard sheet 1 is crushed in the thickness direction, and the other thin portion 1o is formed. It is formed. According to this formation method, the cutting of the corrugated cardboard sheet 1 and the formation of the thin portions 1n and 1o that are crushed in the opposite directions can be performed simultaneously in a single step.

  3A and 3B, if the pressing member is disposed at a position facing the elastic member 6, and the cardboard sheet 1 is sandwiched between these members, the cardboard sheet 1 is more effective. Can be crushed. Moreover, the formation method of the thin parts 1n and 1o is not limited to that shown in the same figure (a), (b), respectively, as long as the corrugated cardboard sheet 1 can be depressed in the opposite direction, Any method may be adopted including the case where the step is performed in a separate step.

In the process of assembling the cardboard box from the corrugated cardboard sheet 1 as described above, for example, the following operations (1) to (3) are performed.
(1) Arrangement of Articles A predetermined number of articles (bottles, cans, bottles, etc.) to be accommodated are arranged on the lower surface 1c with the inner surface of the unfolded corrugated cardboard sheet 1 facing upward.
(2) Bending the corrugated cardboard sheet 1 The corrugated cardboard sheet 1 on which the article is arranged is bent along the dotted line portion in FIG. Thereby, a part of the upper surface 1a and the adhesive margin 1m overlap, and the pair of thin portions 1n and 1o also overlap. (3) Engagement of the corrugated cardboard sheet 1 At the same time, the front and rear openings in the cardboard box are closed. As a locking means for the corrugated cardboard sheet 1, an adhesive, a double-sided tape, a fastener, a hot melt or the like is used. By locking the thin portions 1n and 1o with locking means, the adhesive margin 1m is fixed to the upper surface 1a. Further, the front opening of the cardboard box is closed by engaging the pair of folded outer flaps 1e and 1g outside the pair of folded inner flaps 1f and 1h. Furthermore, the rear opening of the cardboard box is closed by engaging the pair of folded outer flaps 1i, 1k outside the pair of folded inner flaps 1j, 1l. As a result, a cardboard box containing articles, that is, an article container is completed.

  FIG. 4 is a cross-sectional view of a principal part of the assembled cardboard box. In this cardboard box 1 ', the upper surface 1a having an open end is opposed to the adhesive margin 1m connected to the right surface 1d different from the upper surface 1a, and the thin portions 1n and 1o are also overlapped. The thickness of the overlapping portion is twice the thickness W2 of the thin portion alone, and is thinner than the original overlapping thickness 2 × W1 by the amount of the crushing. As a result, as compared with the comparative example in which the crushing process is not performed as shown in FIG. 5, the level difference between the upper surface 1a and the adhesive margin 1m is reduced. In particular, it is preferable that the thickness 2 × W2 of the portion where the thin portions 1n and 1o overlap is approximately the same as the thickness W1 of the other portions because the step can be almost eliminated.

  Thus, according to this embodiment, when assembling the corrugated cardboard box 1 ′, the thin portions 1 n and 1 o are provided by crushing the region including the end portion at the portion where the corrugated cardboard sheets 1 are overlapped. Since the crushing directions of these thin portions 1n and 1o are opposite to each other, the thickness at the time of overlapping is effectively reduced. Thereby, a level | step difference is relieve | moderated and the inner and outer surfaces of the cardboard box 1 'can be smoothed.

  In particular, when the step on the upper surface of the cardboard box 1 ′ is relaxed as in the present embodiment, as shown in FIG. 6, the cardboard boxes 1 ′ stacked in a plurality of stages (the article storage in which the articles 2 are stored). Body) can be effectively prevented from collapsing. This is because the inclination of the upper stage is reduced by relaxing the step on the upper surface by the thin portions 1n and 1o. This is the same even when the thin portions 1n and 1o are provided on the lower surface of the cardboard box 1 '.

  In the above-described embodiment, the case where the thin portions 1n and 1o for reducing the step are provided on the upper surface or the lower surface of the cardboard box 1 ′ has been described. However, the present invention is not limited to this, and the cardboard As long as it is a pair of sheet | seat site | parts with which at least one part overlaps in the assembly state of box 1 ', what location may be sufficient. For example, it may be provided on the side surface of the cardboard box 1 ′ including the flap. When it is provided on the side surface of the cardboard box 1 ′, it is possible to suppress the exposure of the cut surface of the corrugated cardboard sheet 1 and the swelling of the side surface. At the same time, it is possible to effectively prevent unnatural catches during loading. At the same time, it is possible to suppress the product label, bottle mouth, can mouth, cosmetic box, etc. from being caught on the inner surface of the cardboard box 1 ′ during or after the housing of articles such as bottles, cans and bottles.

  As described above, the corrugated cardboard sheet and the article container according to the present invention can be widely applied to applications in which the level difference caused by the overlap of the corrugated cardboard sheets is reduced and the inner and outer surfaces of the cardboard box are smoothed.

DESCRIPTION OF SYMBOLS 1 Corrugated cardboard sheet 1a-1d Main surface 1e-1l Flap 1m Paste allowance 1n, 1o Thin part 1 'Corrugated cardboard box 2 Goods 5 Blanking tool 6 Elastic member 7 Base 8 Protrusion part

Claims (9)

In a corrugated cardboard sheet that is assembled and used as a corrugated cardboard box,
In a state assembled to the cardboard box, a pair of seat portions at least partially overlapping,
A first thin portion formed by crushing an end portion of the one sheet portion in the thickness direction, provided on one of the pair of sheet portions;
Provided on the other of the pair of sheet parts, and formed by crushing the end of the other sheet part in the thickness direction opposite to the first thin part, and assembled to the cardboard box A corrugated sheet having a second thin portion that overlaps with the first thin portion in a state. The one sheet portion is a first main surface having an open end,
The other sheet portion is an adhesive margin which is opposed to the first main surface in a state where the cardboard box is assembled and is connected to a second main surface which is different from the first main surface. The cardboard sheet according to claim 1.   The cardboard sheet according to claim 1, wherein the pair of sheet portions is a pair of flaps. In the article container,
A pair of sheet portions at least partially overlapping, a first thin portion provided in one of the pair of sheet portions, and a second provided in the other of the pair of sheet portions and overlapping the first thin portion. The first thin portion is formed by crushing an end portion of the one sheet portion in the thickness direction, and the second thin portion is an end portion of the other sheet portion. A cardboard box formed by crushing a portion in a thickness direction opposite to the first thin portion;
An article container having an article contained in the cardboard box.   The thickness of the part where the first thin part and the second thin part overlap each other is substantially the same as the thickness of the other part in the pair of sheet parts. Article container.   6. The article container according to claim 4 or 5, wherein the pair of sheet portions are locked to each other at the first thin portion and the second thin portion.   The article container according to any one of claims 4 to 6, wherein the first thin portion and the second thin portion are provided on an upper surface or a lower surface of the cardboard box.   The article container according to claim 7, wherein the cardboard boxes containing the articles are stacked in a plurality of stages.   The article container according to any one of claims 4 to 6, wherein the first thin portion and the second thin portion are provided on a side surface of the cardboard box.

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