JP4631389B2 - box - Google Patents

Description

  The present invention relates to a liquid bag storage box for storing and transporting a plurality of liquid bags containing an infusion solution or the like.

  In medical facilities, high-calorie chemicals that supply nutrition to the human body by infusion are used in large quantities. In many cases, such a liquid bag containing a high-calorie chemical solution has a plurality of chambers for containing two or more types of chemical solutions. For example, as a double bag type liquid bag having two chambers for storing two types of chemical solutions, as shown in FIGS. 7A and 7B, a flexible sheet 82 that overlaps is sealed with a side seal portion 83 and a bottom seal portion 84. The inside of the flexible bag is separated into a plurality of chambers 86 and 87 by a partition wall 85 that can be peeled, and different medicines P and N are separately stored in each chamber, and the partition 85 is peeled off by applying pressure from the outside of the bag during use. Then, the medicines P and N are mixed, that is, in the form of a mixed liquid (chemical liquid) bag 80 at the time of use.

A discharge port 88 for discharging the liquid from the room is provided at one end of the liquid bag 80, and a suspension port 89 is provided at the other end. The discharge port 88 includes a rubber plug 90, a cap 91, a diaphragm 92, a film 93, and the like. For example, as disclosed in Patent Document 1, such a liquid bag typified by a high calorie infusion solution is externally packaged with a film having a high gas barrier performance, and then stored and transported in a cardboard box. At this time, it is necessary to support the load with a cardboard box so that no force is applied to the chemical solution bag.
JP 2000-128150 A

  When a plurality of large-capacity liquid bags represented by high-calorie infusion are stored and transported in a cardboard storage and transport box, the storage and transport box may be damaged by the weight of the liquid bag. In order to prevent this, the box for storing and transporting the liquid bag is made of a double flute and is made of a hard corrugated cardboard to increase the strength, but at this time, the cost is low and the standard flexo folder It is desirable to use a fluted cardboard box made with a gluer machine (FFG machine).

  However, the fluted cardboard box made with such a conventional flexo folder gluer has a fold line of the flap that is on the same line as that of the inner and outer flaps. When folding and folding the flap that forms the top or bottom plate, the inner and outer flaps interfere with each other, increasing the repulsive force. When sealing the edge of the folded flap with adhesive tape There was a problem that the flap was opened against the adhesion by the adhesive tape.

  Further, since the double flute paper constituting the box is hard, there is a problem that when the flap is bent, a large stress acts on the corner portion of the box and a crack occurs. Furthermore, since the double flute paper is thick, if a portion that is bent from the top surface or the bottom surface to the side surface is pasted with an adhesive tape, there has been a problem that the tape will sag when the corrugated paper is crushed in the subsequent transport process. As a result, tampering due to poor sealing, contamination of insects and foreign matters, and poor appearance due to tape slack occur.

  As a method of making a box while solving these phenomena, it is possible to make a box by a punching die method instead of a box making by a flexo folder gluer machine (FFG machine). In other words, if the punching method is used, the positions of the folding line of the inner flap and the ruled line of the outer flap can be changed, so that interference between the flaps can be avoided and flap repulsion can be reduced. However, the die-cutting method has many manufacturing processes and has the problem of generating corrugated paper to be discarded, which is not preferable from the viewpoint of high cost and environmental protection, and is a grooving type by a flexo folder gluer machine that does not generate waste corrugated paper. There was a need to manufacture cardboard boxes.

  An object of the present invention is to solve the problems of a conventional corrugated paper box for storing and transporting a liquid bag, and forming a top plate or a bottom plate while minimizing the decrease in strength of the box for storing and transporting a liquid bag. Liquid bag that can reduce the resistance or repulsion force against the folding of the flap, and can stably seal the top plate and the bottom plate by the adhesive tape, and the sealing by the adhesive tape is not broken by the repulsive force of the flap during transportation It is to provide a box for storage and transportation.

  Another object of the present invention is to provide a box for storing and transporting a liquid bag that can reduce the stress at the corners of the box due to the folding of the flap and prevent the occurrence of cracks. Another object of the present invention is to eliminate problems caused by an increase in the thickness of the overlapping portions of corrugated paper, such as the top plate or bottom plate of the container for storing and transporting the liquid bag being inflated and the stacking being unstable. It is in.

  Another object of the present invention is to use an FFG machine (a machine that performs flexographic printing, folding, and gluing), which is a method for producing a cardboard box with less waste than the conventional method at a lower cost than the method for solving the above problems. The purpose is to make a box by a process.

  In order to achieve the above object, according to the present invention, a box for storing and transporting a plurality of liquid bags, comprising a cardboard top plate, a bottom plate, a front plate, a rear plate, a left plate and a right plate. The front side plate, the rear side plate, the left side plate, and the right side plate including the plate are joined to the upper flap for forming the top plate, respectively, and the top plate is bent along the upper valley line of the left side plate and the right side plate, respectively. A second pair of upper flaps folded along the upper valleys of the front plate and the rear plate, respectively, are overlaid on the upper flaps of the pair of pairs, and the mutually parallel edges of the second pair of upper flaps are bonded with adhesive tape. The upper valleys of the side plates are arranged in substantially the same plane, and the upper flaps are crushed portions that are crushed to a predetermined thickness. A box is provided.

  According to the present invention, a box for storing a plurality of liquid bags and storing and transporting a plurality of liquid bags, a cardboard top plate, a bottom plate, a front side plate, a rear side plate, a left side plate, and a right side plate The front side plate, the rear side plate, the left side plate, and the right side plate are respectively coupled to the upper flap for forming the top plate, and the top plate is bent along the upper valley line of the left side plate and the right side plate, respectively. Over the upper flaps of the pair, the upper flaps of the second pair folded along the upper valleys of the front plate and the rear plate are overlapped, and the parallel edges of the upper flaps of the second pair are joined by adhesive tape The upper valleys of each side plate are arranged in substantially the same plane, and each upper flap has a crushing portion having a predetermined width along two edges perpendicular to the upper valley line and the upper valley line. A box is provided that is characterized by including.

  The crushing portion along the upper valley line (185, 165) on each upper flap connected to the front side plate and the rear side plate may be provided in a range overlapping the left side plate (22) and the right side plate (24). .

Further, it Re 10% to 60% der depth (D) is the thickness of the corrugated board towards the upper valley line downward (t) cuts between the two upper flaps adjacent to each other.

  The depth of cut (D) between the two upper flaps adjacent to each other is 10% to 60% of the thickness (t) of the corrugated paper from the upper trough to the lower side, and is connected to the front plate and the rear plate, respectively. The vertical dimension (H) from the edge parallel to the upper trough line of each upper flap to the upper trough line is 5% of the thickness (t) of the corrugated paper from half the side length (0.5F) of the left or right side plate. It may be formed shorter by% to 50%.

  The front side plate, the left side plate, and the right side plate are combined with a lower flap for forming a bottom plate, and are connected with a lower flap for forming a bottom plate, and the bottom plate is a lower valley line of the left side plate and the right side plate, respectively. The mutually parallel edges of the second pair of lower flaps folded along the lower valleys of the front plate and the rear plate are respectively bonded to the first pair of lower flaps folded along the adhesive tape with an adhesive tape, and sealed The lower valleys of each side plate are arranged in substantially the same plane, and each lower flap is formed so as to include a crushing portion having a predetermined width along two edges perpendicular to the lower valley line. Just do it.

  The depth of cut between two lower flaps adjacent to each other is 10% to 60% of the thickness of the corrugated paper upward from the lower valley line, and each of the lower flaps respectively connected to the front side plate and the rear side plate. The vertical dimension (K) from the edge parallel to the lower valley line to the lower valley line is formed to be shorter by 5% to 50% of the thickness of the corrugated paper than half the side length (0.5F) of the left or right side plate. It ’s fine. The corrugated board has a double flute structure, and its thickness (t) may be about 8 mm.

  According to the box of the present invention, the resistance or repulsive force to the folding of the flap forming the top plate or the bottom plate is reduced while minimizing the decrease in the strength of the liquid bag storage and transport box, and the top plate and the like are provided by the adhesive tape. The bottom plate can be stably sealed, and a box for storing and transporting a liquid bag can be provided in which the sealing by the adhesive tape is not broken by the repulsive force during transportation.

  Further, it is possible to reduce the stress at the corner portion of the box due to the folding of the flap and to make a box for storing and transporting the liquid bag capable of preventing the occurrence of cracks. And it becomes possible to eliminate the problem caused by the increase in the thickness of the overlapping portion of the corrugated paper sheets, such as the top plate or the bottom plate bulging and the stacking becomes unstable. Furthermore, such a box for storing and transporting a liquid bag can be manufactured by an FFG machine capable of manufacturing a cardboard box with less waste than the conventional one at a low cost.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of the liquid bag storing and transporting box 8 according to the embodiment of the present invention with the top plate opened, and FIG. 2 is a liquid bag of FIG. It is a schematic vertical view (sectional view in a cross section parallel to the front side surface and the rear side surface) of the box 8 for storage and transportation. FIG. 2 shows a vertical cross-section of the box 8 in which seven liquid bags 80 (FIGS. 7A and 7B) are folded in the vicinity of the partition wall 85 and placed in an outer bag and accommodated in an alternating manner. FIG. 3 is a perspective view of the box 8 that is sticking the adhesive tape 31 to the top plate of the box 8. 4 is a schematic development view of the corrugated paper for forming the box 8 for storing and transporting the liquid bag of FIG.

  As shown in FIG. 1, a box 8 for storing and transporting a liquid bag includes a front side plate 16, a rear side plate 18, a left side plate 22 and a right side plate 24 made of corrugated cardboard. ) And four upper flaps 161, 181, 221, 241 which are made of corrugated paper with a double flute structure.

  FIG. 3 is a perspective view showing a state in which the top plate of the box 8 for storing and transporting the liquid bag according to the embodiment of the present invention is closed. In FIG. 3, the liquid bag storing and transporting box 8 has the upper flaps 161 and 181 constituting the outside of the top plate 12 folded, and the parallel edges of the upper flaps 163 and 183 are fed out from the adhesive tape roll 30. A state where the adhesive tape 31 is joined to the middle of the edge and sealed is shown. As apparent from FIG. 1, the top plate 12 is formed by first folding upper flaps (inner flaps) 221 and 241 and then bending upper flaps (outer flaps) 161 and 181 thereon.

  As shown in FIG. 2, the entire top plate 12 has a plurality of liquid bags 80 as shown in FIG. 2, and four upper flaps 221, 241, 161, 181 are connected to upper valley lines 165, 185, 245 ( 1 is folded around the upper valley line of the flap 221 (not shown) and sealed with the adhesive tape 31 as shown in FIG. 3 along the edges 163 and 183 of the flaps 161 and 181 on the outer side. It is formed.

  In detail, the top plate 12 bends the upper flaps 221 and 241 along the upper valley lines 225 and 245 of the left side plate 22 and the right side plate 24, respectively, and the upper valleys of the front side plate 16 and the rear side plate 18 thereon, respectively. The upper flaps 161 and 181 are folded and overlapped along the lines 165 and 185. As shown in FIG. 3, the adhesive tape 31 is laid across the parallel edges 163 and 183 of the second pair of upper flaps 161 and 181. It is formed by sticking and sealing between both end edges. In FIG. 1, the left side plate 22 and the right side plate 24 are provided with long holes 23 and 25 for clues in the upper center portions thereof. In FIG. 2, the box 8 accommodates seven liquid bags 80 in a horizontal position. Instead of being placed horizontally, as shown in Japanese Patent Laid-Open No. 2000-128150, it is also possible to accommodate vertically.

  FIG. 4 is a schematic development view of a box material 81 for forming the box 8 for storing and transporting the liquid bag of FIG. This box material 81 is cut out from a piece of corrugated paper. FIG. 5 is an enlarged view of a main part of FIG. As shown in FIG. 4, cut-in portions 511, 531, and 551 are provided between two upper flaps adjacent to each other. As shown in the developed view of FIG. 4, the cut-in portions 511, 531, and 551 have a certain width so that the box material forming the box is cut out from a piece of corrugated paper and the strength of each flap is increased. The groove has G (FIG. 5). The width G of the cut-in portions 511, 531, and 551 is 10% or more of the thickness t of the cardboard, and is preferably 3.5 mm.

  As shown in FIG. 5 (partially enlarged view of FIG. 4), the cutting depth D (FIG. 5) between the two upper flaps 181 and 241 adjacent to each other is directed downward from the upper valley 185 (or 245). And 10% to 60% of the thickness t of the cardboard. More specifically, when the thickness of the corrugated paper is t = 8 mm, the cutting depth D is required to be about 1 mm or more in order to reduce the repulsive force against bending and prevent the occurrence of cracks. The cut depth D is required to be about 4 mm or less so that the air gap is not visible.

  As shown in FIG. 4, when the upper flaps 161 and 181 respectively joined to the front side plate 16 and the rear side plate 18 are bent along the upper valley lines 165 and 185, respectively, The size of the top plate formed by abutting the edges 163 and 183 of the plate is equal to or slightly shorter than the side length F (FIG. 4) of the corresponding left or right plate, and the edges 163 and 183 intersect. Or forming a mountain shape. That is, the vertical dimension H from the edge 163, 183 to the upper valley line 165, 185 is 5% to 30% of the thickness of the corrugated board t from the half (0.5F) of the side length (FIG. 4) of the left or right plate. %, Ie, H = 0.5 F-t (5-30%).

  The box 8 for storing and transporting a liquid bag requires a large strength in order to safely store and transport a heavy liquid bag. Therefore, the cardboard (box material 81) forming the box preferably has a double flute structure and a thickness t larger than that of a single layer as shown in the cross section of FIG. However, when the thickness t of the corrugated cardboard is large, the thickness of the structure portion where the stacking occurs increases, so that the repulsive force of the flap portion increases, and the sealing portion by the adhesive tape is opened or the corner portion is cracked. There is a fear.

  In order to solve such a problem, each upper flap reduces the thickness t of the box material in a portion that does not affect the strength of the box. The portion where the thickness t of the box material is reduced is formed by a crushing portion obtained by crushing the thickness of the box material using a cork.

  Preferably, each upper flap 161, 181, 221, 241 includes a crushed portion along the upper valley line and a crushed portion along two edges perpendicular to the upper valley line, respectively. Each crushing portion has a predetermined width. The non-crushing portion between the crushing portions 1812 and 1814 of the upper flap 181 is a portion that does not overlap the upper flaps 221 and 241.

  The crushing part 1812 of the upper flap 181 and the crushing part 2413 of the upper flap 241 are important crushing parts. That is, it is a portion that interferes when the upper flap 241 is bent and the upper flap 181 is bent to the outside thereof, and these have the effect of competing to push the outer upper flap 181 apart. Therefore, the degree of competing by reducing the thickness of the crushing portions 1812 and 2413, that is, the action of expanding the outer upper flap can be reduced. The lateral length L of the crushed portion 1812 needs to be not less than the longitudinal dimension H of the upper flap 241 (L ≧ H). The crushed portions 1814 and 2211 have a similar relationship. Further, there is a similar situation related to the crushing portion of the upper flap 161.

  The crushing portion 1811 on the side edge of the upper flap 181 and the crushing portion 2412 along the upper valley of the upper flap 241 make the corner portion adjacent to both overlapped when the top plate of the box is assembled thin, The adhesion length of the portion along the side plate of the tape (reference numeral 32 in FIG. 3) is increased, which is effective in preventing peeling. If the crushing parts 1811 and 1813 are not crushed (thickness t = 8 mm), and the adhesive tape is applied, a load is applied from the top due to the subsequent pallet stacking, and the corrugated paper of the box is crushed and the thickness t is reduced. Although the adhesive tape sags and becomes unsightly, by providing the crushing portions 1811 and 2412, it becomes possible to prevent the adhesive tape from sagging.

  A similar relationship exists with respect to the lower flaps 182 and 242 of the bottom plate of the box 8. The crushing part on the bottom plate prevents competition between (A) inner flaps and outer flaps (flaps located inside and outside the box), (B) increases the adhesive length of the adhesive tape on the side (C) It has the purpose of preventing the adhesive tape from sagging due to compression load (gravity) or the like. For these purposes, it is better to provide a crushing portion for the bottom flap as well as the top plate.

  However, in the bottom plate, the crushing portion is reduced for the following reason. First, the crushing part is performed by an FFG machine (a machine that performs flexographic printing, folding, and gluing). In this case, the crushing pressure has a limit, and as the crushing area increases, the unit per unit area increases. The crushing pressure decreases and crushing becomes insufficient. Therefore, for the crushing portion of the bottom plate, the above-mentioned (C) having high importance is prioritized.

  That is, as shown in FIG. 4, with respect to the bottom plate, the crushing portions 1621, 1623, 1821, and 1823 along the side edges of the lower flaps 162 and 182 that are outside are preferentially provided. Compared to the top plate, the bottom plate is pressed from above by its own weight, so that there is basically a favorable condition that the flap does not open.

In order to form the bottom plate by combining the lower flaps 162, 182, 222 and 242, hot melt bonding is used in addition to the adhesive tape. The adhesive tape on the bottom is provided with a perforation in the center for convenient disassembly of the box after use. The symbol R in FIG. 4 indicates a typical hot melt application point. Hot melt has a strong adhesive force and can prevent the opening of the lower flap by itself, but an adhesive tape is applied to prevent foreign matter from entering the gap between the flaps (especially insects). The crushing portions 224, 244 provided along the edges of the lower flaps 222, 242 have the purpose of minimizing the step inside the box. The dimensions of the crushing part are as follows.
A. L ≧ H
I. 40% to 90% of u = t
C. B ≧ 30 mm (for example, 50 mm)
D. C ≧ 20 mm (for example, 30 mm)
E. M ≧ 30mm (basically M = B)

  As shown in FIGS. 4 and 5, the upper flap 181 includes crushing portions 1812 and 1814 along the upper valley line 185 and crushing portions 1811 and 1813 along two edges perpendicular to the upper valley line 185. The upper flap 161 has a crushing portion similar to the upper flap 181. The upper flap 241 includes a crushing portion 2412 along the upper valley line 245 and crushing portions 2411 and 2413 along two end edges perpendicular to the upper valley line 245.

  The upper flap 221 has a crushing portion similar to the upper flap 241. The width M of the crushing portions 1811 and 1813 along two edges perpendicular to the upper valley line 185 is, for example, about 30 mm. The width M of each crushing portion along two edges perpendicular to the other upper valley lines 165, 225, 245 is also about 30 mm.

  FIG. 6 is a sectional view taken along line 6-6 of the crushing portion 1811 of FIG. 5, and enlarges the thicknesses t and u of the crushing portion 1811 of the box material 81 made of corrugated paper having a double flute structure. It is displayed. As shown in FIG. 6, the crushing portion 1811 has a width M along the edge perpendicular to the upper valley line 185, and as shown schematically in FIG. The thickness t of the normal part is provided, and the thickness of the other end is u. u is 40% to 90% of t. A width M of the crushing portion 1811 is, for example, 50 mm. In the upper flap 181, the width B (FIG. 5) of the crushing portions 1812 and 1814 along the upper valley line 185 is about 50 mm. The width C (FIG. 5) of the crushing portion 2412 along the upper valley line 245 is about 30 mm.

  The bottom plate of the box 8 is formed by the four lower flaps 162, 182, 222, and 242 in substantially the same manner as the top plate 12. In other words, the bottom plate is formed on the first pair of lower flaps 222 and 242 bent along the lower valley lines 226 and 246 of the left side plate 22 and the right side plate 24, respectively, and the lower valley line 166 of the front side plate 16 and the rear side plate 18 respectively. A second pair of lower flaps 162 and 182 folded along 186 are overlapped, and parallel edges of the second pair of lower flaps 162 and 182 are joined and sealed with an adhesive tape. The depth of cut between two lower flaps adjacent to each other is set to 10% to 60% of the thickness t of the corrugated cardboard from the lower valley line upward (FIG. 4).

  The vertical dimension K (FIG. 4) from the edge 164 parallel to the lower valley 166 of each lower flap 162 coupled to the front plate 16 and the rear plate 18 to the lower valley 166 is that of the left or right plates 222, 242. It is the same as or slightly shorter than the side length F (FIG. 4).

  In the above-described embodiment, each upper flap 161, 181, 221, 241 has a crushing portion along the upper valley line and a crushing portion along two edges perpendicular to the upper valley line, respectively. The part that does not overlap with the upper flaps 221 and 241 is a non-crushing part, but in addition to this, a crushing part that crushes each of the upper flaps over almost the entire surface may be used. Good. By making the almost entire surface of each upper flap a crushed portion, it is possible to effectively alleviate the action of the upper flap to spread.

FIG. 1 is a perspective view showing a state in which a top plate of a box for storing and transporting a liquid bag according to an embodiment of the present invention is opened. FIG. 2 is a schematic vertical sectional view of the liquid bag storing and transporting box of FIG. 1 storing seven liquid bags. FIG. 3 is a perspective view of the liquid bag storing and transporting box according to the embodiment of the present invention with the top plate closed. FIG. 4 is a schematic development view of a box material forming the box for storing and transporting the liquid bag of FIG. FIG. 5 is an enlarged view of a main part of the developed view of FIG. FIG. 6 is a cross-sectional view taken along line 6-6 in FIG. 5 and is an enlarged cross-sectional view showing thicknesses t and u. 7A is a side view of a typical two-liquid separation type liquid bag, and FIG. 7B is a cross-sectional view taken along line XX in FIG. 7A.

Explanation of symbols

8: Box for storing and transporting a liquid bag, 12: Top plate, 16: Front side plate, 18: Rear side plate, 24: Right side plate, 30: Adhesive tape roll, 31: Adhesive tape, 80: Liquid bag, 81 : Box material (corrugated paper), 161, 181, 221, 241: Upper flap, 162, 182, 222, 242: Lower flap, 163, 183: Edge, 165, 185, 245: Upper valley line, 166, 186 226, 246: Lower valley line, 168: Bello, 511, 531, 551: Cut portion, 1811, 1813, 2412: Crush portion, C: Width of crush portion, D, J: Cut depth, G: Width of cut portion, H, K: Vertical dimension, M: Width of crushed portion, L: Length, N, P: Chemical solution, R: Hot melt portion, u: Thickness of corrugated paper in crushed portion, t : Corrugated paper thickness.

Claims (8)

  A box for storing and transporting a plurality of liquid bags, including a cardboard top plate, a bottom plate, a front side plate, a rear side plate, a left side plate and a right side plate, including a front side plate, a rear side plate, a left side plate and a right side plate Each is coupled with an upper flap for forming a top plate, and the top plate is respectively formed on a first pair of upper flaps bent along an upper valley of the left side plate and the right side plate, respectively, on the front side plate and the rear side plate. The second pair of upper flaps folded along the upper valley line are overlapped, and the parallel edges of the second pair of upper flaps are joined and sealed with adhesive tape, and the upper valley line of each side plate is The box characterized by being arranged in substantially the same plane, and each upper flap being crushed to a predetermined thickness on substantially the entire surface thereof.   A box for storing and transporting a plurality of liquid bags, including a cardboard top plate, a bottom plate, a front side plate, a rear side plate, a left side plate and a right side plate, including a front side plate, a rear side plate, a left side plate and a right side plate Each is coupled with an upper flap for forming a top plate, and the top plate is respectively formed on a first pair of upper flaps bent along an upper valley of the left side plate and the right side plate, respectively, on the front side plate and the rear side plate. The second pair of upper flaps folded along the upper valley line are overlapped, and the parallel edges of the second pair of upper flaps are joined and sealed with adhesive tape, and the upper valley line of each side plate is A box arranged substantially in the same plane, wherein each upper flap includes an upper valley line and a crushing portion having a predetermined width along two edges perpendicular to the upper valley line.   The crushing portion along the upper valley line (185, 165) on each upper flap connected to the front side plate and the rear side plate is provided in a range overlapping the left side plate (22) and the right side plate (24). A box according to claim 2 characterized in that To claim 2, characterized in that 10% to 60% of the cutting depth between two adjacent top flaps (D) is a corrugated paper thickness toward the upper valley line downward (t) to each other The box described .   The depth of cut (D) between the two upper flaps adjacent to each other is 10% to 60% of the thickness (t) of the corrugated paper from the upper trough to the lower side, and is connected to the front plate and the rear plate, respectively. The vertical dimension (H) from the edge parallel to the upper trough line of each upper flap to the upper trough line is 5% of the thickness (t) of the corrugated paper from half the side length (0.5F) of the left or right side plate. A box according to any one of claims 2 to 4, characterized in that it is shorter by% to 50%.   The front side plate, the left side plate, and the right side plate are coupled to a lower flap for forming a bottom plate, respectively, and the bottom plate is folded along a lower valley line of the left side plate and the right side plate, respectively. The second pair of lower flaps folded along the lower valley line of the front side plate and the rear side plate are joined to each other by an adhesive tape and sealed, and the lower valley line of each side plate is formed by sealing. 6. The apparatus according to claim 2, wherein the lower flaps are arranged in substantially the same plane, and each of the lower flaps includes a crushed portion having a predetermined width along two edges perpendicular to the lower valley line. The box described.   The depth of cut between two lower flaps adjacent to each other is 10% to 60% of the thickness of the corrugated paper upward from the lower valley line, and each of the lower flaps respectively connected to the front side plate and the rear side plate. The vertical dimension (K) from the edge parallel to the lower valley line to the lower valley line is shorter by 5% to 50% of the thickness of the corrugated paper than half the side length (0.5F) of the left or right board. The box according to any one of claims 2 to 6.   The box according to any one of claims 2 to 7, wherein the corrugated board has a double flute structure, and its thickness (t) is about 8 mm.

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