JP3210653U - Box sheet - Google Patents

Abstract

The present invention provides a box sheet that is easy to stack packaging boxes and that can sufficiently suppress collapse of the packaging boxes in a stacked state. The box sheet is defined by an easy-to-break line 22 formed in a convex shape from one of the upper edge and the lower edge of the long face panel 2 toward the flap 10 extending from the long face panel. The insertion piece 23, a pair of first cuts 24 extending from the other of the upper and lower edges of the long face panel to the length face panel, and a second cut 25 connecting the base ends of the pair of first cuts. And an opening forming portion 27 which is defined by a pair of third cuts 26 extending from the base ends of the pair of first cuts to the flap side and into which the inserted piece of another assembled box sheet can be inserted. . [Selection] Figure 1

Description

  The present invention relates to a box sheet.

  A pair of long surface panels and a pair of width surface panels that can constitute the rectangular tube-shaped portion, and an upper opening and an upper opening of the rectangular tube-shaped portion extending from the upper and lower edges of the length surface panel and the width surface panel, respectively Packaging boxes assembled from corrugated cardboard sheets having a flap that can seal the lower opening are widely used. This packaging box is used as, for example, a commodity storage box, and may be stacked on another packaging box when storing, transporting, displaying, or the like.

  As this packaging box, one that can suppress the collapse of the load in a stacked state has been proposed. As a packaging box capable of suppressing such load collapse, for example, a “packaging box” (see JP 2007-55629 A) has been proposed.

  The packaging box described in the above publication includes a notch piece defined by a notch formed in a convex shape on the upper outer flap with the boundary line of the long face panel and the upper outer flap as a base end, and the long face panel or the lower It has an insertion hole formed in the side outer flap and into which the cut piece of the other packaging box is inserted. The packaging box described in the above publication can stably maintain the stacked state by inserting the cut pieces of the packaging box disposed on the lower side into the insertion holes of the packaging box stacked on the upper side. Has been.

JP 2007-55629 A

  As described above, in the packaging box described in the above publication, the cut piece is formed with the boundary between the length panel and the upper outer flap as the base end, and the insertion hole is either the length panel or the lower outer flap. Formed. However, when the insertion hole is formed in the long face panel, the insertion piece of the packaging box disposed on the lower side is first taken out to the outside in the left-right direction of the packaging box stacked on the upper side, and then this insertion piece is appropriately disposed. It is necessary to bend at the position and insert it into the insertion hole. On the other hand, when the insertion hole is formed in the lower outer flap, it is necessary to bend the insertion piece upward at an appropriate position and insert the insertion piece into the insertion hole with the insertion piece tilted in the left-right direction.

  As described above, in this packaging box, the operation of inserting the insertion piece into the insertion hole is complicated. Further, since the strength of the folding position of the packaging box is reduced by folding the insertion piece, the load may collapse relatively easily when a lateral force is applied to the packaging box stacked on the upper side. There is.

  The present invention has been made in view of such inconveniences, and it is easy for the packaging boxes to be stacked, and for the box that can sufficiently suppress the collapse of the packaging boxes in the stacked state. It is an object to provide a sheet.

  A box sheet according to the present invention made to solve the above problems comprises a pair of long surface panels and a pair of width surface panels that form a rectangular cylindrical portion during assembly and are opposed to each other in the assembled state, and the pair of sheets. A pair of upper outer flaps extending from the upper edge of the length surface panel, a pair of upper inner flaps extending from the upper edge of the pair of width surface panels, and a lower edge of the pair of length surface panels A box sheet comprising a pair of lower outer flaps to be taken out and a pair of lower inner flaps extending from the lower edges of the pair of width panel, and can be assembled into a box shape, An insertion piece defined by an easy-to-break line formed convexly from one of the upper edge and lower edge of the length panel to the flap side, and the other of the upper edge and the lower edge of any one of the length panels A pair of first cuts extending from the side to the length side panel Another box sheet defined and assembled by a second cut connecting the base ends of the pair of first cuts and a pair of third cuts extending from the base ends of the pair of first cuts to the flap side. And an opening forming portion into which the insertion piece can be inserted.

  The box sheet has an insertion piece defined by an easy-to-break line formed in a convex shape from one of the upper edge and the lower edge of any one of the length surface panels to the flap side. The insertion piece is configured to be able to protrude outward in the vertical direction of the lid or bottom formed by abutting the tips of the pair of outer flaps. Further, the box sheet has a pair of first cuts extending from the other of the upper edge and the lower edge of any one of the long face panels toward the length face panel, and proximal ends of the pair of first cuts. An opening that is defined by a second cut that connects each other and a pair of third cuts that extend from the base ends of the pair of first cuts to the flap side, and into which the inserted piece of another box sheet assembled can be inserted. Since it has a formation part, an opening can be formed in the area | region containing the boundary of the said length surface panel and an outer flap in an assembly state. The box sheet includes a first piece in which the opening forming portion is defined by a pair of first cuts and a second cut, and a second piece defined by the second cut and the pair of third cuts. When the insertion piece of the other packaging box is inserted into the opening formed by the opening forming portion in the assembled state, the first piece is slightly inclined outward in the left-right direction and the second piece is inward in the up-down direction. Slightly inclined. Therefore, the box sheet can be inserted into the opening without difficulty while guiding the insertion piece of another packaging box between the first piece and the second piece. Therefore, the box sheet can easily stack the packaging boxes, and can sufficiently suppress load collapse in the stacked state by inserting the insertion pieces of the other packaging boxes into the openings.

  It is good to have an easy bending line which connects the tip of a pair of above-mentioned 3rd cut. Thus, by having an easy-to-bend line that connects the tips of the pair of third cuts, it is easy to incline the second piece inward in the vertical direction, making it easier to insert the other piece in the packaging box. And it can insert reliably in the said opening, and it is easy to keep the insertion state of the said insertion piece stably.

  The insertion piece may include a substantially rectangular base portion having a base end of the upper edge or the lower edge of the length surface panel. As described above, since the insertion piece has a substantially rectangular base portion having the upper edge or the lower edge of the long surface panel as a base end, the insertion state of the insertion piece can be easily maintained stably.

  It is preferable that the left and right lengths of the base portion and the opening forming portion are substantially equal, and the left and right ends of the base portion are chamfered. In this way, the base portion and the opening forming portion have substantially the same length in the left-right direction, and the left and right ends of the base portion are chamfered, so that the insertion piece can be easily inserted into the opening. This can be performed, and the insertion state of the insertion piece can be kept more stable.

  The insertion piece has a protruding portion protruding from the tip of the base portion, and the easy-to-break line includes a plurality of slits provided at intervals, and a non-cutting portion disposed between adjacent slits. And the non-cutting portion is preferably located at the tip of the protruding portion. Thus, the insertion piece has a protruding portion protruding from the tip of the base portion, and the easy break line is arranged between the plurality of slits provided at intervals and the adjacent slits. And the uncut portion is positioned at the tip of the protruding portion, so that the protruding portion can be prevented from being unintentionally bent at the time of assembling the packaging box, etc. It can suppress that an insertion piece separates from the cover part or bottom part of a packaging box unintentionally.

  In this specification, “left-right direction” means a horizontal direction in a general usage mode assumed in an assembled state, and “upper” and “lower” indicate an assumed general usage mode. Although it means the upper and lower sides in the above, it is not intended to limit the orientation of the box sheet before use.

  As described above, the box sheet according to the present invention is easy to stack the packaging boxes, and can sufficiently suppress the collapse of the packaging boxes in the stacked state.

It is a typical top view showing the sheet for boxes concerning one embodiment of the present invention. It is a typical perspective view which shows the packaging box formed by assembling the sheet | seat for boxes of FIG. It is a typical perspective view which shows the state which piled up the two packaging boxes of FIG. It is a typical perspective view which shows the starting procedure of the insertion piece of the packaging box of FIG. It is typical side surface sectional drawing which shows the insertion state of the insertion piece of the two packaging boxes of FIG. It is a schematic plan view which shows the sheet | seat for boxes which concerns on the form different from the sheet | seat for boxes of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

[First embodiment]
[Box sheet]
The box sheet in FIG. 1 is composed of a single sheet and is configured to be assembled into a box shape. The box sheet includes a pair of long surface panels 1 and 2 and a pair of width surface panels 3 and 4 that form a rectangular cylindrical portion when assembled and face each other in an assembled state. Specifically, the box sheet has a first length surface panel 1, a first width surface panel 3, a second length surface panel 2, and a second width surface panel 4 connected from one side to the other side in the left-right direction. The margin part 13 is connected to the edge of the first length surface panel 1 opposite to the connection side with the first width surface panel 3. The box sheet includes a pair of upper outer flaps 5 and 6 extending from the upper edges of the pair of long surface panels 1 and 2 and a pair of upper surfaces of the pair of width surface panels 3 and 4. A pair of upper inner flaps 7, 8; a pair of lower outer flaps 9, 10 extending from the lower edges of the pair of long surface panels 1, 2; Lower inner flaps 11 and 12. The pair of upper outer flaps 5 and 6 and the pair of upper inner flaps 7 and 8 are configured as a lid portion forming panel that forms a lid portion that seals the upper end of the rectangular cylindrical portion in an assembled state. Further, the pair of lower outer flaps 9 and 10 and the pair of lower inner flaps 11 and 12 are configured as a bottom portion forming panel that forms a bottom portion that seals the lower end of the rectangular tubular portion in the assembled state. In FIG. 1, a thick solid line indicates an edge formed by cutting the sheet, and a thin solid line indicates a ruled line formed by pushing the surface of the sheet.

  The sheet used for the box sheet is not particularly limited as long as it has sufficient strength to maintain the shape of the packaging box formed by assembling the box sheet. For example, the sheet made of paper such as cardboard sheet or cardboard is used. Examples thereof include a sheet, a synthetic resin sheet, and a laminated sheet of a paper sheet and a synthetic resin sheet. Among them, a paper sheet is preferable from the viewpoints of processability, impact absorbability, handleability, recyclability, economy, and the like, and a cardboard sheet is particularly preferable. The corrugated cardboard forming the box sheet is obtained by bonding a core formed of a base paper into a corrugated shape to a liner, for example, a single side in which the core formed in a corrugated shape is bonded to a single liner Corrugated cardboard sheet, double-sided cardboard sheet with a liner attached to the top of a single-sided cardboard sheet, double-sided cardboard sheet with a single-sided cardboard sheet laminated with one-sided cardboard sheet, single-sided cardboard on one side A double-sided corrugated cardboard sheet in which the tops of the sheets are further bonded together can be used. Among these, double-sided cardboard sheets are preferable from the viewpoint of processability, economy, durability, and the like.

  A procedure for assembling the box sheet will be described. First, the first length surface panel 1 is folded on the inner surface of the first width surface panel 3, and then the second width surface panel 4 is folded on the inner surface of the second length surface panel 2, and the adhesive margin 13 is set to the second width surface. Adhere to the inner surface of the panel 4. Thereby, the 1st length surface panel 1, the 1st width surface panel 3, the 2nd length surface panel 2, and the 2nd width surface panel 4 are connected endlessly. The box sheet is generally provided to the user in a state where the first length surface panel 1, the first width surface panel 3, the second length surface panel 2, and the second width surface panel 4 are connected in an endless manner. .

  Next, the first length surface panel 1, the first width surface panel 3, the second length surface panel 2, and the second width surface panel 4 connected in an endless manner are connected to the first length surface panel 1 and the second length. A rectangular tubular portion is formed by spreading so that the face panel 2 faces and the first width face panel 3 and the second width face panel 4 face each other. Further, the pair of lower inner flaps 11 and 12 are bent inward at a substantially right angle, the pair of lower outer flaps 9 and 10 are bent inward at a substantially right angle, and the tips are brought into contact with each other to form a bottom portion. In addition, sealing tape X etc. can be stuck to the abutting part of a pair of lower outer flaps 9 and 10 so as to maintain the abutting state. Subsequently, the pair of upper inner flaps 7 and 8 are bent substantially vertically inward, and the pair of upper outer flaps 5 and 6 are bent substantially vertically inward and the tips are brought into contact with each other to form a lid. In addition, the sealing tape X etc. can be stuck to the butt | matching part of a pair of upper outer flaps 5 and 6 so that a butt | matching state may be maintained. Thereby, the packaging box 21 of FIG. 2 is assembled.

  The pair of long surface panels 1, 2 and the pair of width surface panels 3, 4 are each formed in a substantially rectangular shape. The pair of long surface panels 1 and 2 are formed in substantially the same shape. The pair of width surface panels 3 and 4 are formed in substantially the same shape. The vertical lengths of the pair of long surface panels 1 and 2 and the pair of width surface panels 3 and 4 are substantially equal. Further, the left and right lengths of the pair of long face panels 1 and 2 are larger than the left and right lengths of the pair of width face panels 3 and 4.

  The vertical lengths of the pair of long surface panels 1 and 2 and the pair of width surface panels 3 and 4 can be set as appropriate depending on the size of the articles accommodated in the packaging box 21 formed by assembling the box sheet. It can be 10 cm or more and 30 cm or less. The length in the left-right direction of the pair of long surface panels 1 and 2 can be set as appropriate depending on the size of the article accommodated in the packaging box 21 formed by assembling the box sheet. it can. The length in the left-right direction of the pair of width surface panels 3 and 4 can be set as appropriate depending on the size of the article accommodated in the packaging box 21 formed by assembling the box sheet, and can be set to, for example, 5 cm or more and 20 cm or less.

  The first long face panel 1 and the upper outer flap 5 extending from the upper edge of the first length face panel 1 are provided with an outlet forming portion 14 for forming an outlet for taking out articles. . The take-out forming portion 14 includes a substantially rectangular take-out forming easy break line 15 formed over the first length surface panel 1 and the upper outer flap 5 and straight portions of the take-out forming easy break line 15. A first notch 16 for breaking start extending from the inner side to the second notch 16 for breaking start extending outward from a portion between the pair of first notch 16 for breaking start of the easy-to-break breakage line 15 17 and a third notch for breaking start 18 which is connected to the outer end of the second notch for breaking start 17 and is arranged in parallel with the easy-to-break breaking line 15 for forming the outlet. In the assembled state, the take-out forming part 14 puts the operator's finger into the inside of the packaging box 21 from the second notch 17 for breaking start, puts this finger inside the area between the first notch 16 for breaking start, and outwards. By pulling, the whole easy-to-break breakable line 15 can be broken. In the assembled state, the box sheet breaks the easy-to-break breakable line 15 and separates the portion surrounded by the easy-to-break breakable line 15 from the packaging box 21 so that the takeout can be formed. It is configured. In this embodiment, the region included in the easy-to-break breakable easy line 15 is cut out in the assembled state of the pair of upper inner flaps 7 and 8.

  The box sheet includes an insertion piece 23 defined by an easy-to-break line 22 formed in a convex shape from the lower edge of the second length surface panel 2 to the lower outer flap 10 side, and the second length surface panel 2. A pair of first cuts 24 extending from the upper edge to the second length surface panel 2 side, a second cut 25 connecting the base ends of the pair of first cuts 24, and a base end of the pair of first cuts 24 And an opening forming portion 27 into which an inserted piece 23 of another assembled box sheet can be inserted. As shown in FIG. 3, the box sheet is formed by inserting the insertion pieces 23 of the packaging box 21b stacked on the upper side into the opening formed by the opening forming portion 27 of the packaging box 21a disposed on the lower side. The horizontal position of the packaging boxes 21a and 21b in the stacked state can be fixed, thereby suppressing the deviation of the packaging boxes 21a and 21b and stably stacking these packaging boxes 21a and 21b. it can. The insertion piece 23 and the opening forming portion 27 are preferably formed at the same position in the left-right direction of the second length surface panel 2, and more preferably formed at the center in the left-right direction. Hereinafter, the insertion piece 23 and the opening forming portion 27 will be described in detail.

(Inset piece)
The insertion piece 23 includes a substantially rectangular base portion 23a having a lower end of the second length surface panel 2 as a base end, and a protruding portion 23b protruding from the tip of the base portion 23a. In addition, a foldable line (first foldable line 23c) is formed at the connecting portion of the base portion 23a and the protruding portion 23b. The protruding part 23b protrudes from the central part in the left-right direction of the base part 23a, and is formed in a substantially semicircular shape. The box sheet has a base portion 23a, 21b in a stacked state, with the insertion piece 23 having a substantially rectangular base portion 23a having the lower edge of the second length surface panel 2 as a base end. It is easy to stably hold 23a between the pair of first cuts 24, and thus it is easy to keep the insertion state of the insertion piece 23 stable.

  The lower limit of the ratio of the length in the left-right direction of the base portion 23a to the length in the left-right direction of the second length surface panel 2 is preferably 0.10, and more preferably 0.15. On the other hand, the upper limit of the ratio is preferably 0.25, and more preferably 0.20. If the ratio is less than the lower limit, the stacked packaging boxes 21a and 21b may not be held sufficiently stably. On the contrary, if the ratio exceeds the upper limit, the horizontal length of the base portion 23a becomes unnecessarily large, and it may be difficult to insert the insertion piece 23 into the opening formed by the opening forming portion 27.

  The lower limit of the ratio of the vertical length of the base portion 23a to the length in the left-right direction of the base portion 23a is preferably 0.2, and more preferably 0.3. On the other hand, the upper limit of the ratio is preferably 0.7, and more preferably 0.6. If the ratio is less than the lower limit, the length of the insertion piece 23 in the vertical direction becomes insufficient, and thus the stability of the stacked state of the packaging boxes 21a and 21b in a state where the insertion piece 23 is inserted into the opening. May not be sufficiently obtained. Conversely, if the ratio exceeds the upper limit, the vertical length of the insertion piece 23 becomes unnecessarily large, and it may be difficult to insert the insertion piece 23 into the opening.

  The length in the left-right direction of the base portion 23a is preferably substantially equal to the length in the left-right direction of the opening forming portion 27 (the interval between the pair of first cuts 24). Specifically, the lower limit of the ratio of the length in the left-right direction of the base portion 23a to the length in the left-right direction of the opening forming portion 27 is preferably 0.90, and more preferably 0.95. On the other hand, the upper limit of the ratio can be set to 1.00 from the viewpoint of holding the base portion 23 a between the pair of first cuts 24. When the ratio is within the above range, the insertion piece 23 is prevented from being displaced with respect to the opening in a state where the insertion piece 23 is inserted into the opening. Therefore, the stacked packaging boxes 21a and 21b are prevented from being displaced. It can be easily and reliably suppressed.

  Moreover, it is preferable that the left-right direction length of the base part 23a and the opening formation part 27 is the said sheet | seat for boxes concerned, and the right and left of the front-end | tip of the base part 23a are chamfered. In this case, the ratio of the length in the left-right direction of the base portion 23a to the length in the left-right direction of the opening forming portion 27 is particularly preferably 1.00. Further, in this case, for example, the tip edge of the base portion 23a may have a shape curved like a bow toward the protruding direction as a whole. In the box sheet, the length of the base part 23a and the opening forming part 27 in the left-right direction is substantially equal, and the left and right ends of the base part 23a are chamfered, so that the insertion piece 23 is inserted into the opening. The insertion state of the insertion piece 23 can be kept stable.

  The lower limit of the length in the left-right direction at the base end of the projecting portion 23b (boundary with the base portion 23a) is preferably 1.0 cm, and more preferably 1.5 cm. On the other hand, the upper limit of the length in the left-right direction is preferably 3.0 cm, and more preferably 2.5 cm. Moreover, as a minimum of the maximum protrusion length of the protrusion part 23b, 0.5 cm is preferable and 0.8 cm is more preferable. On the other hand, the upper limit of the maximum protrusion length is preferably 2.5 cm, and more preferably 2.0 cm. As shown in FIG. 4, the box sheet is folded in the projecting portion 23b in the assembled state by the first foldable line 23c, and the base is placed with the operator's finger on the tip edge of the base portion 23a. The insertion piece 23 can be raised from the bottom by lifting the portion 23 a to the outside of the packaging box 21. At this time, since the length in the left-right direction and the maximum protrusion length of the base end of the protrusion 23b are within the above ranges, the protrusion 23b can be easily bent inward, and the bending of the protrusion 23b can be used. Thus, it is easy to put an operator's finger on the leading edge of the base portion 23a.

  The breakable line 22 that defines the insertion piece 23 preferably includes a plurality of slits provided at intervals and a non-cut portion disposed between adjacent slits. Moreover, it is preferable that the said non-cut | disconnecting part is located in the front-end | tip of the protrusion part 23b. According to this structure, it can suppress that the protrusion part 23b bends unintentionally at the time of the assembly of the packaging box 21, etc., and also suppresses that the insertion piece 23 unintentionally separates from the bottom part of the packaging box 21. Can do.

(Opening part)
The pair of first cuts 24 are each formed in a straight line, and are disposed at right angles to the upper edge of the second length surface panel 2. The lengths of the pair of first cuts 24 are equal. Further, each of the pair of third cuts 26 is formed in a straight line, and is disposed perpendicular to the upper edge of the second length surface panel 2. Further, the pair of third cuts 26 are equal in length.

  The lengths of the pair of first cuts 24 and the pair of third cuts 26 are preferably equal. The lower limit of the length of the pair of first cuts 24 and the pair of third cuts 26 is preferably 1.5 cm, and more preferably 1.8 cm. On the other hand, the upper limit of the length is preferably 3.0 cm, and more preferably 2.5 cm. As shown in FIG. 5, the box sheet includes a first piece 31 in which an opening forming portion 27 is defined by a pair of first cuts 24 and second cuts 25, and a second cut 25 and a pair of third cuts 26. The insertion piece 23 of the packaging box 21b disposed on the upper side is inserted into the opening formed by the opening forming portion 27 of the packaging box 21a stacked on the lower side. The first piece 31 is slightly inclined outward in the left-right direction, and the second piece 32 is slightly inclined downward. As a result, the box sheet guides the insertion piece 23 of the packaging box 21b disposed on the upper side between the first piece 31 and the second piece 32, and inserts the insertion piece 23 into the opening without difficulty. I can do it. In this regard, if the length is less than the lower limit, the insertion piece 23 needs to be relatively inclined with respect to the second length surface panel 2 when inserted into the opening. There is a risk that it is difficult to easily insert the opening. Moreover, if the said length is less than the said minimum, it will become easy to contact the insertion piece 23 with the articles | goods accommodated in the lower packaging box 21a, and there exists a possibility that the insertion to the said opening of the insertion piece 23 may become difficult. is there. Conversely, if the length exceeds the upper limit, the function of guiding the insertion piece 23 by the first piece 31 and the second piece 32 may be insufficient, or the first piece 31 and the second piece in a stacked state. The function of stably holding the insertion piece 23 by 32 may be insufficient.

  The lower limit of the ratio of the vertical length of the base portion 23a to the vertical length of the first cut 24 and the third cut 26 is preferably 0.7, and more preferably 1.0. On the other hand, the upper limit of the ratio is preferably 2.5 and more preferably 2.0. If the ratio is less than the lower limit, the function of stably holding the insertion piece 23 by the first piece 31 and the second piece 32 in a stacked state may be insufficient. Conversely, if the ratio exceeds the upper limit, it may be difficult to insert the insertion piece 23 into the opening.

  It is preferable that the opening forming portion 27 has an easy-to-bend line (second easy-to-bend line 28) that connects the tip portions of the pair of first cuts 24. Thereby, it becomes easy to incline the 1st piece 31 to the left-right direction outer side, and while being able to insert the insertion piece 23 of the packaging box 21b arrange | positioned at upper side into the said opening more easily and reliably, an insertion piece It is easy to keep the 23 insertion state stable.

  Moreover, it is preferable that the opening formation part 27 has a bendable line (third bendable line 29) that connects the tips of the pair of third cuts 26 to each other. Accordingly, the second piece 32 can be easily inclined downward, and the insertion piece 23 of the packaging box 21b disposed on the upper side can be more easily and reliably inserted into the opening. It is easy to keep the insertion state stable.

<Advantages>
The box sheet has an insertion piece 23 defined by an easy-to-break line 22 formed in a convex shape from the lower edge of the second length surface panel 2 to the lower outer flap 10 side. The insertion piece 23 is configured to be able to protrude below the bottom formed by abutting the tips of the pair of lower outer flaps 9 and 10 together. The box sheet connects the base ends of the pair of first cuts 24 and the pair of first cuts 24 extending from the upper edge of the second length face panel 2 to the second length face panel 2 side. The second cut 25 and the pair of third cuts 26 extending from the base ends of the pair of first cuts 24 to the upper outer flap 6 side can be inserted into the inserted piece 23 of another assembled box sheet. Since the opening forming portion 27 is provided, the opening can be formed in a region including the upper end of the second length surface panel 2 and the boundary of the upper outer flap 6 in the assembled state. The box sheet is assembled between a first piece 31 defined by a pair of first cuts 24 and a second cut 25 and a second piece 32 defined by a second cut 24 and a pair of third cuts 26. The insertion piece 23 can be inserted into the opening without difficulty while guiding the insertion piece 23 of the packaging box 21b disposed on the upper side. Therefore, the box sheet is easy to stack the packaging boxes 21a and 21b, and the insertion piece 23 of the packaging box 21b disposed on the upper side is inserted into the opening of the lower packaging box 21a. Load collapse in the stacked state can be sufficiently suppressed.

[Second Embodiment]
The box sheet in FIG. 6 is composed of a single sheet and is configured to be assembled into a box shape. The box sheet includes a pair of long surface panels 31 and 32 and a pair of width surface panels 33 and 34 that form a rectangular cylindrical portion when assembled and face each other in an assembled state. Specifically, in the box sheet, a first length surface panel 31, a first width surface panel 33, a second length surface panel 32, and a second width surface panel 34 are connected from one side to the other in the left-right direction. The margin part 43 is connected to the edge of the first length surface panel 31 opposite to the connection side with the first width surface panel 33. The box sheet includes a pair of upper outer flaps 35 and 36 extending from the upper edges of the pair of long surface panels 31 and 32 and a pair of upper surfaces of the pair of width surface panels 33 and 34. A pair of upper inner flaps 37, 38, a pair of lower outer flaps 39, 40 extending from the lower edges of the pair of long surface panels 31, 32, and a pair of extending from the lower edges of the pair of width surface panels 33, 34 Lower inner flaps 41 and 42. The pair of upper outer flaps 35 and 36 and the pair of upper inner flaps 37 and 38 are configured as a lid portion forming panel that forms a lid portion that seals the upper end of the rectangular tubular portion in the assembled state. Further, the pair of lower outer flaps 39 and 40 and the pair of lower inner flaps 41 and 42 are configured as a bottom forming panel that forms a bottom portion that seals the lower end of the rectangular tubular portion in the assembled state.

  The box sheet includes an insertion piece 53 defined by an easy break line 52 formed in a convex shape from the upper edge of the second length surface panel 32 toward the upper outer flap 36, and the second length surface panel 32. From the pair of first cuts 54 extending from the lower edge to the second length face panel 32 side, the second cut 55 connecting the base ends of the pair of first cuts 54, and the base ends of the pair of first cuts 54 It has the opening formation part 57 which is demarcated by a pair of 3rd cut 56 extended to the lower side outer flap 40 side, and can insert the insertion piece 53 of the other box sheet assembled. The box sheet is configured in substantially the same manner as the box sheet of FIG. 1 except that the insertion position of the insertion piece 53 and the opening forming portion 57 is different from that of the box sheet of FIG.

  The box sheet is inserted into the opening formed by the opening forming part 57 of the packaging box stacked on the upper side by inserting the insertion piece 53 of the packaging box disposed on the lower side of the packaging box in the stacked state. The horizontal position can be fixed, thereby suppressing the deviation of the packaging boxes, and these packaging boxes can be stacked stably.

<Advantages>
The box sheet is in an assembled state between a first piece defined by a pair of first cuts 54 and a second cut 55 and a second piece defined by a second cut 55 and a pair of third cuts 56. The insertion piece 53 can be inserted into the opening without difficulty while guiding the insertion piece 53 of another packaging box disposed on the lower side. Therefore, the sheet for boxes is easy to stack the packaging boxes, and is inserted into the opening of the upper packaging box by inserting the insertion piece 53 of the packaging box disposed on the lower side in the stacked state. Load collapse can be sufficiently suppressed.

[Other Embodiments]
In addition, the box sheet | seat which concerns on this invention can be implemented in the aspect which gave the various change and improvement other than the said aspect. For example, the insertion piece and the opening forming portion only have to be formed from one of the first length surface panel and the second length surface panel, and both the insertion piece and the opening formation portion are necessarily the second length. It may not be formed from the face panel. Further, it is not always necessary to provide the insertion piece and the opening forming portion one by one, and a plurality of insertion pieces and opening forming portions may be provided.

  The insertion piece does not necessarily have a substantially rectangular base. Moreover, even if it is a case where the said insertion piece has the said base part, it does not need to have the protrusion part which protrudes from the front-end | tip of this base part. Furthermore, the specific configuration of the breakable line that defines the insertion piece is not particularly limited. For example, a slit of the breakable line may be located at the tip of the protruding portion.

  As described above, the box sheet of the present invention is easy to stack packaging boxes, and can sufficiently suppress the collapse of packaging boxes in a stacked state. Suitable as a box sheet used for storage, display, etc.

1,31 1st length surface panel 2,32 2nd length surface panel 3,33 1st width surface panel 4,34 2nd width surface panel 5,6,35,36 Upper outer flap 7,8,37,38 Upper side Inner flaps 9, 10, 39, 40 Lower outer flaps 11, 12, 41, 42 Lower inner flaps 13, 43 Glue margin 14 Extraction port 15 Easy-to-break breakage line 16 First cut for break initiation 17 Second notch for starting fracture 18 Third notch for starting fracture 21, 21, a, 21b Packaging box 22, 52 Easy break line 23, 53 Insertion piece 23a Base part 23b Protruding part 23c First easy break line 24, 54 First Cuts 25, 55 Second cuts 26, 56 Third cuts 27, 57 Opening forming portion 28 Second fold easy line 29 Third fold easy line 31 First piece 32 Second piece X Sealing tape

Claims (5)

A pair of long face panels and a pair of wide face panels that form a rectangular tubular portion during assembly and face each other in the assembled state;
A pair of upper outer flaps extending from the upper edges of the pair of length surface panels;
A pair of upper inner flaps extending from the upper edges of the pair of width surface panels;
A pair of lower outer flaps extending from the lower edges of the pair of length surface panels;
A pair of lower inner flaps extending from the lower edges of the pair of width surface panels,
A box sheet that can be assembled into a box shape,
An insertion piece defined by an easy-to-break line formed in a convex shape from one of the upper edge and the lower edge of any one of the above-mentioned length surface panels;
A pair of first cuts extending from the other of the upper and lower edges of any one of the long face panels to the long face panel, a second cut connecting the base ends of the pair of first cuts, and the above A box sheet having an opening forming portion into which the insertion piece of another box sheet assembled and defined by a pair of third cuts extending from the base ends of the pair of first cuts to the flap side can be inserted.   The sheet | seat for boxes of Claim 1 which has a bendable line which connects the front-end | tips of a pair of said 3rd cut.   The box sheet according to claim 1 or 2, wherein the insertion piece has a substantially rectangular base portion having a base edge of an upper edge or a lower edge of the length surface panel.   The box seat according to claim 3, wherein the base part and the opening forming part have substantially the same length in the left-right direction, and the left and right ends of the base part are chamfered.   The insertion piece has a protruding portion protruding from the tip of the base portion, and the easy-to-break line includes a plurality of slits provided at intervals, and a non-cutting portion disposed between adjacent slits. The box sheet according to claim 3, wherein the non-cut portion is located at a tip of the protruding portion.

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