JP6536342B2 - Box and box blank sheet - Google Patents

Description

  The present invention relates to a box and its blank sheet, and more particularly to a cardboard packaging box and its blank sheet.

  A corrugated cardboard packaging box (hereinafter, also referred to as a box) capable of accommodating and transporting goods and dividing the box up and down at the time of opening and utilizing the lower part as a display tray is conventionally known. Such a cardboard packaging box is suitable for dealing with labor shortages and cost factors associated with reordering products at a store, and thus is suitably used, for example, in the distribution industry having a store.

  One method for dividing the box up and down is to provide a tape-like tear strip with two perforated cut lines on the side of the box, and open it by pinching the tear with a finger. In the case of this method, the opening operation may take time due to tearing of the tear band during the division and the like. In addition, the tear strips separated from the box become individual waste.

  On the other hand, as another method for dividing the box up and down, for example, Patent Document 1 is a so-called wrap-around type cardboard packaging box with long side plates and flaps extending on both ends in the longitudinal direction thereof and flaps. Discloses a continuous continuous perforated line. The cut line draws a generally gentle corrugation in the long side plate and has an inverted trapezoidal or rectangular portion that is partially downwardly convex in the corrugation valley. Division of the box is performed with this portion as the separation start portion. The operator first bends the separation start portion inside the box to form an opening, then puts a hand from the opening opening, grasps the bent separation start portion by hand, pulls it, and cuts the perforation Cut a line. The box is divided into two by sequentially performing this for both long side plates. According to this method, as compared with the conventional box, there is an advantage that the cut line is easy to cut, a relatively clean cut is obtained, and a part separated from the box does not occur as an individual waste, Workability is good.

Utility model registration 3,156,835 gazette

  However, the box described in Patent Document 1 is configured to separate the entire cut line extending around the box by pulling the separation start portion provided on the long side plate. Therefore, when cutting the cut line formed in the surface other than a long side plate, ie, the flap which constitutes a short side, there was a case where time and effort returned.

  An object of this invention is to provide the box excellent in the workability at the time of opening which can perform division | segmentation of a box more easily, and its blank sheet.

  The box according to the present invention includes four side surfaces including a pair of opposing first side surfaces and a pair of second side surfaces opposing in a direction orthogonal to the first side surface, and the four side surfaces A box of rectangular parallelepiped shape comprising a pair of opposing flat surfaces, wherein each of the pair of second side surfaces is a pair of inner flaps extending from each of the pair of first side surfaces, and the pair of And a pair of outer flaps extending from each of the flat surfaces and joined to overlap the outer surfaces of the pair of inner flaps, wherein the four side surfaces include the box on one flat side of the pair of flat surfaces and the other The present invention is characterized in that a perforated cut line for dividing into two on the flat surface side is provided, and the cut line on each of the four side surfaces includes a portion serving as a separation start portion.

  The blank sheet according to the present invention is a blank sheet of the box according to the present invention, wherein the first flat plate having the outer flaps extending from both ends via the folding line, and the folding line on the first flat plate A first side plate connected via the folding line and the inner flaps extending from both ends via the folding line, and connected via the folding line to the first side plate via the folding line A second flat plate from which the flap extends, a second side plate connected to the second flat plate via a fold line, the inner flap extending from both ends through the fold line, and And a joint margin for connecting the second side plate and the first flat plate, which is connected to one of the two side plates and one of the first flat plates via a folding line, The side plates and the inner flaps extending from the two ends A perforated cut line is provided having an end at an end of the inner flap opposite to the side plate and extending between the ends, the cut line of each side plate A portion serving as a separation start portion biased to the second flat plate side with respect to an intersection point of the cut line and a bending line between the side plate and the inner flap, the side plate and the side plate And an inclined portion which is inclined with respect to a bending line between each flat plate and connected from the intersection point to a portion which becomes the separation start portion, and the inner flap is in contact with the cut line of the inner flap Or the opening is transverse to the cut line of the inner flap, the opening being biased toward the first flat plate with respect to the cut line of the inner flap, the first flat plate The outer flaps extending from both ends of the Two sets of two separate auxiliary cut lines are provided extending from the end of the outer flap opposite to the first flat plate toward the first flat plate side. Do.

  ADVANTAGE OF THE INVENTION According to this invention, the easy cutting off of the cut line provided around the box is attained, and the workability at the time of opening is improved.

It is a top view of the blank sheet of the box concerning the embodiment of the present invention. It is a perspective view which shows the state before opening of the box which concerns on embodiment of this invention obtained by assembling the blank sheet | seat shown in FIG. It is a figure explaining the opening procedure of the box shown in FIG. It is a figure explaining the opening procedure of the box shown in FIG. It is a figure explaining the opening procedure of the box shown in FIG. It is a figure explaining the opening procedure of the box shown in FIG. It is a figure explaining the use form after opening of the box shown in FIG.

  In a box according to an embodiment of the present invention, a box is divided into two by a perforated cut line provided around the box and the box is opened. By starting cutting from the separation start portion, a hand hole or finger hole for the separation operation is provided. According to the box according to the embodiment of the present invention, the cut line can be easily separated, and the workability at the time of opening can be improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the figure, a thin line indicated by reference numeral 11 means a bending line, and hereinafter, referred to as a bending line 11 in the present specification. The folding line 11 may be subjected to a ruled line process to facilitate folding. Further, in the drawing, a dotted line indicated by reference numeral 12 means a perforated cut line for performing separation, and hereinafter, referred to as a cut line 12 in the present specification.

  Here, the perforation-like cut line is a line formed by alternately arranging cut-off portions and non-cut-off portions. In the present specification, when terms such as “one, two, etc.”, “connected (connected)”, and “continuous” are used with respect to a cut line, attention is paid to the cut off portion of the cut line Instead, whether it is one or is connected depending on whether there is continuity in the line that can be conceived from the alternating arrangement of the cut and uncut parts of the cut line , Etc. shall be said.

  The present invention is not limited to the embodiments described below and the variations described above, and appropriate modifications and variations can be made without departing from the technical concept of the present invention.

Embodiment
<Structure>
FIG. 1 is a plan view of a blank sheet 10 of a box according to an embodiment of the present invention, ie, corresponds to a development of the box according to an embodiment of the present invention. FIG. 2 is a perspective view of the box 100 according to the embodiment of the present invention obtained by assembling the blank sheet 10 shown in FIG. 1, in which an article (a plastic bottle in this embodiment) is accommodated. Indicates

  First, the structure of the box 100 of the present invention will be described. The box 100 according to the present invention includes four side surfaces including a pair of opposing first side surfaces 2 and 4 and a pair of second side surfaces opposing in a direction orthogonal to the first side surfaces 2 and 4; It has a rectangular parallelepiped shape formed of a pair of flat surfaces 1 and 3 facing each other across the four side surfaces.

  Each of the pair of second side surfaces extends from each of the pair of inner flaps 6, 8 extending from each of the pair of first side surfaces 2, 4 and each of the pair of flat surfaces 1, 3 And a pair of outer flaps 5 and 7 joined to overlap the outer surface of the inner flap.

  The four side surfaces are provided with perforation-like cut lines 12 for dividing the box 100 into one of the flat surfaces 1 and 3 and the other flat surface side of the pair of flat surfaces 1 and 3. Each of the cut lines 12 includes a portion serving as a separation start portion. In the present invention, by providing the part serving as the separation start portion of the cut line not only on the long side surface but also on the short side surface, cutting of the cut line becomes easy, and the workability of the separation improves.

  In each of the pair of second side surfaces, the cut line 12 is provided on the pair of inner flaps 6 and 8.

  The cut lines 12 of the pair of inner flaps 6 and 8 are in a portion where the pair of outer flaps 5 and 7 do not overlap. The cut lines 12 of the pair of inner flaps 6 and 8 may be in a position where the opposing edges of the pair of outer flaps 5 and 7 are in contact with each other. When the cut line of the inner flap is at any of these positions, there is no need to cut the outer flap at the time of cutting the cut line 12 described later, and the cut becomes easy.

  The pair of inner flaps 6 and 8 have an opening 15 in contact with the cut line 12 of the pair of inner flaps 6 and 8. The opening 15 may cross the cut line 12 of the pair of inner flaps 6, 8. The portion of the cut line 12 in contact with the edge of the opening 15 is the portion that becomes the separation start portion of the cut line on the short side surface.

  The opening 15 may be biased to one plane side with respect to the cut line 12. According to this configuration, when cutting the cut line 12 described later, the force is easily transmitted and the cutting becomes easy.

  In the present embodiment, one opening 15 is provided for each of the pair of inner flaps 6 and 8. Even if the openings 15 are provided in only one of the pair of inner flaps 6, 8, the workability of separation is facilitated as compared with the configuration of the prior art, but by providing both, the workability of separation is achieved. It will be better. Moreover, although the structure by which the opening 15 is provided with two or more by each inner flap is also the scope of the present invention, it is preferable to make the number of openings into one for each flap from a viewpoint of strength of a box.

  The size of the opening 15 is not less than the extent to which fingers can be inserted and moved at the time of separation work from the part to be the separation start part of the cut line 12 and can be set as appropriate. However, from the viewpoint of the strength of the box, the size of the opening has a preferable range and an upper limit.

  In the present embodiment, the outer flap 5 is a pair of auxiliary cut lines extending along the edge of the opening 15 from the opposing edge of the outer flap 5 to the plane side from which the outer flap extends. Have fourteen. According to this configuration, in the opening operation described later, when cutting the auxiliary cutting line 14, the operator can bend the portion sandwiched by the auxiliary cutting line 14 to the inside of the box 100 through the opening 15 of the inner flap. .

  Further, the portion 16 serving as the separation start portion of the cut line 12 of the first side faces 2 and 4 is the end of the cut line 12 of the first side faces 2 and 4 and the first side face 2 , 4 may be biased toward one of the pair of flat surfaces 1 and 3 with respect to a connecting portion connecting the end of the cut line 12 of the second side surface adjacent to the second and third side faces. In the present embodiment, the portion 16 to be the separation start portion is biased to the flat surface 3 side, but as described above, the portion 16 to be the separation start portion is biased to the flat plate side to be the bottom when using the box. It is preferable from the viewpoint of the ease of cutting the cut line.

  The cut line 12 of the first side surfaces 2 and 4 has an inclined portion which is inclined with respect to the pair of planes 1 and 3 and is connected from the connection portion to the portion 16 serving as the separation start portion. Thus, if it has the inclined part which inclines toward the part 16 used as the cutting start part from the edge part of a 1st side, it does not have such an inclined part, for example, ends are linear. The cutting line is easier to cut as compared with the configuration having the cutting line 12 connected in a straight line.

  The inclination of the pair of flat surfaces 1 and 3 may be larger as the inclined portion approaches the portion 16 side which becomes the separation start portion. According to this configuration, in the opening operation described later, cutting of the portion 16 serving as the separation start portion is facilitated, and the opening start port having a size suitable for the opening operation is formed by cutting the portion. It becomes possible.

  The opening 15 and the portion 16 serving as the separation start portion of the first side surfaces 2 and 4 may be biased toward different planes of the pair of planes with respect to the connection portion. For example, when the portion 16 serving as the separation start portion is disposed toward the flat plate 3 serving as the bottom in use as described above, the opening 15 is biased to the flat plate 1 serving as the opposite top. The configuration in which the cutting lines 12 are arranged makes it easy for the worker to cut the cut line 12.

  A plane side different from the plane side on which the part 16 which becomes the separation start portion of the first side faces 2 and 4 is biased with respect to the cut line 12 of the second side face on the second side face The one-sided pushing portion 13 may be provided in a biased manner. That is, in the present invention, a hand hole may be provided in order to remove one (upper half) after dividing the box 100 into two. By forming the hook holes in such a manner as a one-sided pushing portion, it is possible to prevent the generation of cutting pieces which are cut and become dust when they are pushed. In addition, although the structure which provided the handhold hole as a through-hole from the beginning is also the range of this invention, it is preferable to set it as a half-opening pushing part from a viewpoint of the intensity | strength and boxability of a box.

  Next, the blank sheet 10 of the box 100 of the present invention will be described. The blank sheet 10 is formed, for example, from a single corrugated cardboard sheet of uniform thickness by a method such as die cutting. The corrugated cardboard sheet applicable to the present invention includes, for example, a corrugated core and a front liner laminated on the surface side of the core from the viewpoint of strength and ease of processing and forming. And a back liner laminated on the back side of the core.

  Referring to FIG. 1, blank sheet 10 is connected to first flat plate 1 having outer flaps 5 extending from both ends via folding line 11 and to first flat plate 1 via folding line 11. The first side plate 2 from which the inner flaps 6 extend from both ends via the folding line 11, and the first side plate 2 connected via the folding line 11 via the folding line 11. A second flat plate 3 from which the outer flaps 7 extend from both ends, and the second flat plate 3 are connected to the second flat plate 3 via the folding line 11, and the inner flaps 8 extend from both ends via the folding lines 11. The second side plate and the first flat plate connected to the second side plate 4 and one of the second side plate 4 and the first flat plate 1 via the folding line 11 And a joint margin 9 for connecting the face plates.

  Each of the side plates 2, 4 and the inner flaps 6, 8 extending from the both ends have an end portion at an end edge of the inner flaps 6, 8 opposite to the side plates, and between the ends A perforated cut line 12 is provided which extends to That is, when the side plate and the inner flaps at both ends are viewed as one unit, the unit may extend from one edge to the other edge of the unit, such as crossing both the inner flap and the side plate One perforated cut line is provided. This cut line makes it possible to divide the box into two. The cut line is preferably continuous at the connecting portion of the inner flap and the side plate, but it is within the scope of the present invention even if there is a slight deviation that is acceptable in terms of ease of cutting.

  The cut line 12 of each of the side plates 2 and 4 is the second one with respect to the intersection of the cut line 12 and the folding line 11 between the side plates 2 and 4 and the inner flaps 6 and 8. The separation start portion is inclined from the intersection point with respect to the bending line 11 between the portion 16 serving as the separation start portion biased to the flat plate 3 side and the side plates 2, 4 and the flat plates 1, 3 And an inclined portion connected to the portion 16.

  The inner flaps 6, 8 have openings 15 in contact with the cut line 12 of the inner flaps 6, 8 or across the cut line 12 of the inner flaps 6, 8.

  The opening 15 is biased toward the first flat plate 1 with respect to the cut line 12 of the inner flaps 6 and 8.

  In the outer flaps 5 extending from both ends of the first flat plate 1, the outer flaps 5 face the first flat plate 1 from the edge opposite to the first flat plate 1. There are two sets of two separate auxiliary cut lines 14 extending.

  The outer flap 5 extending from both ends of the first flat plate 1 may be provided with a single-opening pressing portion 13. The single-opening push-in portion 13 may be a region defined by perforation cut lines 12 whose ends are separated from each other, and a bending line 11 may be formed between the ends.

<Assembly>
An example of an assembly procedure for assembling the box 100 from the blank sheet 10 according to the embodiment of the present invention will be described with reference to FIGS. 1 and 2. In FIG. 2, the box 100 has a plastic bottle housed and sealed therein as an example of a storage item. The transportation of the box in the merchandise distribution is performed in the sealed state shown in FIG. In addition, in this specification, a "sealing" is engaging and fixing the inner flap and outer flap of a box, and making the short side of a box the closed state, or the state. The dimensions of the box 100 and the blank sheet 10 can be appropriately set in consideration of the size of the product as the contents.

  In the blank sheet 10 in the state shown in FIG. 1, first, a container such as a product to be packaged is placed on the second flat plate 3. Then, the folding line 11 located between each of the first and third flat plates 1 and 3 and the first and second side plates 2 and 4 is bent to form a first bonding via bonding using a joint margin 9 The flat plate 1 of 1 and the second side plate 4 are connected to form a square tubular portion surrounding the contents. Then, the inner flaps 6, 8 and the outer flaps 5, 7 are folded in the inward direction of the square tubular portion to form short side portions, and the overlapping portions are adhered to fix the short side portions. As a result, the contents are sealed in a state of being packaged in the cardboard packaging box 100, and are in the state shown in FIG.

  Alternatively, as another example of the assembly procedure, the joint margin 9 is used by appropriately bending the folding lines 11 of the flat plates 1 and 3 and the side plates 2 and 4 of the blank sheet 10 in the state shown in FIG. The top plate 1 and one side plate 4 are connected via adhesion to form a sheet in a planar state which becomes a square cylinder when three-dimensionally spread. Next, the sheet is spread in a three-dimensional cylindrical shape, and the contents to be packaged are inserted from the opening of the formed square cylindrical portion. Thereafter, as in the example described above, the flaps are folded to form short side portions, and the overlapping portions are bonded to fix the short side portions. As a result, the contents are sealed in a state of being packaged in the cardboard packaging box 100, and are in the state shown in FIG. The sheet in the flat state obtained in this example, which has a square cylindrical shape when expanded three-dimensionally, has an area approximately half that of the expanded blank sheet 10, so Handling is easy when stacking or carrying in the state of

<Opened>
The opening procedure of the box according to the embodiment of the present invention will be described with reference to FIGS. 2 to 6.

  FIG. 2 is a perspective view of the box according to the embodiment of the present invention, and the box 100 is in a closed state before the opening operation is started. The box 100 is provided with a perforated cut line 12 for dividing the box 100 into upper and lower parts so as to surround the box 100. In particular, the perforated cut lines 12 extend across the plane of the first and second side plates 2, 4 (i.e. the long sides) and then extend from the ends of each side plate 2, 4 It extends transversely in the plane of the exiting inner flaps 6, 8 (i.e. the short sides). The opening operation in the present invention, which will be described in detail below, includes cutting (performing) the perforated cut line 12 to divide the box 100 into upper and lower parts and removing the upper part.

  With reference to FIG. 3 and FIG. 4, the cutting procedure of the perforated cut line 12 provided in each side plate 2 and 4 of the box 100 is demonstrated.

  FIG. 3 is a diagram for explaining the start stage of the opening operation. The operator cuts the portion 16 serving as the separation start portion of the cut line 12 provided on the side plates 2 and 4 of the box 100 by pressing it toward the inside of the box 100, and further cuts the separation start portion and The portion in the vicinity of the portion 16 is folded to the inside of the box to form an opening opening as shown in FIG. At this time, bending may be facilitated by providing the bending line 11 in advance in the vicinity of the portion 16 which is to be the separation start portion.

  FIG. 4 is a diagram for explaining the stage of the opening operation following the stage shown in FIG. Although FIG. 4 shows the box 100 as viewed obliquely from below for the purpose of easy understanding, the worker can work while the box 100 is placed on a floor or a desk. The operator puts a hand in the opening start opening formed by the process described with reference to FIG. 3 and grasps a portion near the portion 16 serving as the separation start portion, and then the portion 16 serving as the separation start portion. The portion in the vicinity is pulled in the outer direction (for example, substantially horizontal direction) of the box 100 to cut the perforated cut line 12. Although FIG. 4 shows that both side plates 2 and 4 are simultaneously subjected to the cutting operation using both hands, the cutting operation may be performed separately for each side. By this operation, the cut line 12 extending in the plane of the side plates 2 and 4 can be cut.

  Then, with reference to FIG. 5, the cutting procedure of the perforated cut line 12 provided in the inner flaps 6 and 8 of the short side of the box 100 is demonstrated.

  The operator uses two perforated auxiliary cut lines 14 provided on the outer flap 5 of each short side of the box 100 and extending from the edge of the outer flap 5 toward the flat plate 1 side, It is shown in FIG. 5 by cutting the vicinity thereof by pressing it toward the inside of the box and further bending the portion between the two perforated auxiliary cut lines 14 separated from each other to the inside of the box. Form such an opening opening. That is, the portion sandwiched by the two perforation-like auxiliary cutting lines 14 which are separated from each other serves as a pressing notch. At this time, bending (pushing) may be facilitated by providing in advance a bending line 11 connecting the two perforation-like auxiliary cutting lines 14 separated from each other.

  Here, the two auxiliary cut lines 14 of the outer flap 5 extend along the edge of the opening 15 of the inner flaps 6, 8. Therefore, by cutting the auxiliary cut line 14 and bending the part to be inserted therein, a second opening start port as shown in FIG. 5 can be formed on the short side.

  The worker inserts a finger such as a thumb into the formed second opening start opening, and the outer flap 7 fixed to the inner flaps 6, 8 by the inner flaps 6, 8 covered by the fingers and the adhesive etc. Then, the box 100 is pulled in the outward direction (substantially horizontal direction) to cut the perforated cut line 12. Although FIG. 5 shows that both short sides are simultaneously cut using both hands, the cutting may be performed separately for each side, and for two openings at a time. Alternatively, it may be performed for one opening. By this operation, the cut line 12 extending in the plane of the short side can be cut.

  Here, the cutting of the cut line 12 using the opening side opening on the long side shown in FIG. 4 and the cutting of the cut line 12 using the opening side opening on the short side shown in FIG. They may also be performed in the reverse order of the description order or may be performed alternately, that is, they can be performed in random order. Through these cutting procedures, the box 100 is cut into two, the whole of the cut lines 12 surrounding the four sides, and divided into upper and lower parts.

  According to the present invention, since there is a portion serving as the separation start portion of the cut line for dividing the box into two on all four side surfaces, the separation work can be easily performed.

  Next, with reference to FIG. 6, the procedure for lifting and removing the upper half of the box 100 divided into upper and lower halves will be described.

  At each short side of the box 100, the operator cuts the cut line by pressing the portion 13 to be the hook hole whose area is defined by the cut lines whose ends are separated toward the inside of the box, Furthermore, by bending the portion 13 to be the hook hole to the inside of the box, the hook hole as shown in FIG. 6 is formed. That is, the part 13 which becomes a handhold hole becomes a half open pushing part. At this time, bending (pushing) may be facilitated by providing in advance bending lines 11 which connect the ends of the cut lines separated from each other.

  The operator can lift and remove the upper half of the divided box 100 by putting a hand into the formed hook hole.

<Use form after opening>
The usage form after opening the box will be described with reference to FIG. FIG. 7 (a) is the upper half of the box 100 divided into upper and lower parts, and FIG. 7 (b) is the lower half of the box 100 divided into upper and lower parts. After opening, the contents of the box 100 (in this example, plastic bottles) are left in the lower half. Therefore, the lower half of the box can be used as a display tray as it is, for example, at a storefront such as a distribution industry where a store is set up. It is effective for correspondence.

  Moreover, although the upper half of the box can be discarded as it is, according to the present invention, since the opening operation is performed by dividing by a cut line, it can be discarded without generating fine debris.

<Others>
The present invention is not limited to the above-described embodiment and the various modifications described above, and appropriate modifications and changes can be made without departing from the technical concept of the present invention.

  For example, in the above-described embodiment, two sets of the auxiliary cut lines 14 forming the opening 15 and the pressing notch portion are provided for each short side, but in the present invention, the openings 15 and the auxiliary cut line 14 are One set may be provided for each short side, or three or more sets may be provided. Preferably, one opening 15 is provided for each inner flap and a corresponding set of auxiliary cutting lines 14 are provided correspondingly, in view of the effect of easy removal and the strength of the box.

  Moreover, in the above-mentioned embodiment, although the auxiliary cut line 14 which forms a pushing notch part is provided in one outer flap (1st outer flap) 5 in each short side, in this invention, an auxiliary cut line 14 may be provided on the other outer flap (second outer flap) 7 and similar auxiliary cutting lines 14 may be provided on both outer flaps (first and It may be provided on the second outer flaps 5, 7).

  Moreover, in the above-mentioned embodiment, although the part used as the handhold hole for removing the upper half of the box divided into 2 up and down is provided a total of two in both short sides, in the present invention, the handhold hole The number of portions may be provided on the long side, and the number is not limited to two, and may be three or more or one.

Reference Signs List 1 and 3 flat plates 2 and 4 side plates 5 and 7 outer flaps 6 and 8 inner flaps 9 joint allowance 10 box blank sheet 11 bending line 12 perforation-like cut line 13 part to be hooked hole )
14 auxiliary cut line 15 opening 16 part 100 box serving as the separation start portion of the perforated cut line

Claims (10)

Four side surfaces consisting of a pair of opposing first side surfaces and a pair of second side surfaces opposing in a direction orthogonal to the first side surface;
A pair of opposing flat surfaces sandwiching the four side surfaces;
A box of rectangular solid shape,
Each of the pair of second side surfaces extends from each of the pair of inner flaps extending from each of the pair of first side surfaces and each of the pair of flat surfaces so as to overlap the outer surfaces of the pair of inner flaps And a pair of outer flaps joined together;
The four side surfaces are provided with perforation-like cut lines for dividing the box into one plane side and the other plane side of the pair of planes.
Each of the cut line of the four sides, viewed contains a portion to be the disconnection start portion,
In each of the pair of second side surfaces, the cut line is provided to the pair of inner flaps,
The cut line of the pair of inner flaps is in a portion where the pair of outer flaps do not overlap or in a position where opposing edges of the pair of outer flaps are in contact with each other;
The pair of inner flaps has an opening in contact with the cut line of the pair of inner flaps or across the cut line of the pair of inner flaps;
The box is characterized in that the opening is biased toward one of the pair of flat surfaces with respect to the cut line . The box according to claim 1 , wherein the opening is provided in each of the pair of inner flaps. At least one of the pair of outer flaps has two separate auxiliary cut lines extending along the edge of the opening from the opposing edge of the outer flap to the flat side from which the outer flap extends. The box according to claim 1 or 2, characterized by The portion serving as the separation start portion of the cut line of the first side surface is an end portion of the cut line of the first side surface and the cut line of the second side surface adjacent to the first side surface The box according to any one of claims 1 to 3 , characterized in that the connection portion connecting with the end portion of the box is biased to one of the pair of flat sides. Wherein the cut line of the first aspect, according to claim 4, characterized in that it comprises an inclined portion that is connected to the portion serving as the disconnection start portion from the connecting portion is inclined with respect to said pair of plane box. The box according to claim 5 , wherein the sloped portion has a larger slope with respect to the pair of planes as it gets closer to the portion that becomes the separation start portion. The said opening and the part used as the said cutting start part of the said 1st side are biased to the mutually different plane side of the said pair of planes regarding the said connection part, The 4 to 6 characterized by the above-mentioned. The box according to any one of the above. The second side surface is biased to a plane side different from the plane side on which the portion serving as the separation start portion of the first side surface is biased with respect to the cut line of the second side surface, A box according to any one of claims 4 to 7 , characterized in that a one-sided push-in portion is provided. A box blank sheet according to any one of claims 1 to 8,
A first flat plate whose outer flaps extend from both ends via folding lines;
A first side plate connected to the first flat plate via a fold line, the inner flaps extending from both ends via the fold line;
The flat plate is connected to the first side plate via a folding line, and is connected via a folding line to a second flat plate whose outer flaps extend from both ends via the folding line A second side plate in which the inner flaps extend from both ends via the folding line,
A joint margin for connecting the second side plate and the first flat plate, which is connected to one of the second side plate and the first flat plate via a folding line;
Equipped with
Each side plate and an inner flap extending from the both ends thereof have an end portion at an end edge opposite to the side plate of the inner flap, and extend between the ends. Cut lines are provided,
The cut line of each side plate becomes a separation start portion biased toward the second flat plate side with respect to an intersection point of the cut line and a bending line between the side plate and the inner flap. A portion and an inclined portion which is inclined with respect to a bending line between the side plate and the flat plates and is connected from the intersection to a portion serving as the separation start portion;
The inner flap has an opening in contact with the cut line of the inner flap or across the cut line of the inner flap;
The opening is configured to be biased toward the first flat plate with respect to the cut line of the inner flap when the box is assembled .
In the outer flaps extending from both ends of the first flat plate, two sets of the outer flaps extending from the end opposite to the first flat plate to the first flat plate side are provided. A blank sheet characterized in that two separate auxiliary cutting lines are provided. 10. The blank sheet according to claim 9 , wherein the outer flaps extending from both ends of the first flat plate are provided with a single-opening pressing portion.

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