JP5249460B1 - Packing box - Google Patents

Abstract

[PROBLEMS] To realize a packaging box that can be closed without using gluing or tape sticking, and can be unpacked without using a tool.
A blank 2 forming a packaging box 1 has a top plate portion 10, a bottom plate portion 30, a front plate portion 20, and a rear plate portion 40, and two bottom plate flaps 31 and 32 are connected to the bottom plate portion. Yes. A box having a quadrilateral cross section can be formed by bending the front plate portion, the rear plate portion, and the bottom plate flap with respect to the bottom plate portion. Two top plate flaps 11 and 12 are connected to the top plate portion, and the top plate portion can be bent and covered with a box, and the two flaps of the top plate portion can be bent and stacked on the bottom plate flap. The lid side locking pieces 13 to 16 extend to the top plate flap, and the box locking pieces 33 to 36 extend to the bottom plate flap. The box locking piece and the lid side locking piece are bent along the inner surface 20x of the front plate portion and the inner surface 40x of the rear plate portion, and the box body locking piece and the lid side locking piece are engaged. Stop. The packaging box 1 formed tear lines 17, 18, 21, 22.
[Selection] Figure 1

Description

  In the present invention, it is possible to form a packing box and to close the lid without adhering the blank with glue or attaching a tape or the like, and to close the packing box by hand without using a tool. The present invention relates to a packing box that can be packed.

  A packaging box that accommodates various articles, for example, a packaging box for delivery or storage, includes a plate portion that forms four side surfaces, a plate portion that serves as a top surface, and a blank that includes a plate portion that serves as a bottom surface. It is common to make a packing box by folding along a line. In such a packaging box, adjacent board parts are adhere | attached with glue etc., or it sticks with a tape, and a packaging box is formed (patent documents 1-5).

  Closing the packaging box is done by bonding the top or side plate that will be the lid with glue etc. or sticking it with tape, while unpacking is done either on the top or side of the packaging box or Some are performed by tearing the perforations formed on both sides (Patent Documents 3 and 4). Alternatively, there is a case where the plate portions positioned on the top surface and the bottom surface are closed with a tape or the like, and the tape is peeled off when unpacking (Patent Document 5).

  However, each packaging box described above cannot form a packaging box unless it is glued or affixed with a tape when accommodating an article. In addition, the packaging box is required to be securely closed and the contents cannot be seen from the outside, and must be glued or taped to close the gaps formed at the boundaries of each surface. There is also. For this reason, for example, in the mail-order sales industry, there is a problem that the cost increases due to generation of material costs such as gluing at the time of assembling the packaging box or tape attaching work and glue.

  The packaging box glued or attached with tape must be peeled off at the time of unpacking, and requires a tool such as a cutter knife, so that unpacking is not easy. Furthermore, when recycling the tape, the tape must be peeled off from the dismantled packaging box, which causes problems of unpacking work and increased work cost. Even in a packaging box that tears a perforation that is easy to unpack, the processing of tape in recycling causes the same problem. Each of the above problems is the same even when the packaging box is used for article storage or the like.

JP 2010-095262 A JP 2008-074458 A Japanese Patent No. 4852920 Japanese Patent No. 4938402 JP 2004-168354 A

  Therefore, the present invention realizes a packaging box that can be securely closed without gluing or sticking tape, and can be unpacked by hand without the need for tools such as a cutter knife when unpacking. When recycling, the packaging box can be easily disassembled, and separation of tape or the like is unnecessary, and more preferably, a packaging box with fewer gaps formed when the blank is bent is realized.

  In order to solve the above problems, in the packaging box according to the present invention (Claim 1), a blank for forming the packaging box has a top plate portion, a bottom plate portion, a front plate portion, and a rear plate portion. The front plate portion is interposed between the first side of the top plate portion and the first side of the bottom plate portion, and the second side opposite to the first side of the bottom plate portion is connected to the rear plate portion. The top plate and the bottom plate have a substantially quadrilateral shape that is substantially similar, the bottom plate third side flap is on the third side of the blank bottom plate, and the bottom plate fourth side is on the fourth side opposite to the third side. Each flap is connected. This blank has a quadrilateral cross-sectional shape in which the front plate portion, the rear plate portion, the bottom plate third side flap and the bottom plate fourth side flap are bent at the respective crease portions, and the area facing the bottom plate portion is opened. Can be formed.

  The top plate portion has a closing piece formed on the second side facing the first side, the top plate third side flap connected to the third side, and the top side connected to the fourth side. It has a plate fourth side flap, and the boundary between the top plate portion, the top plate third side flap and the top plate fourth side flap is a crease portion.

  Therefore, the top plate part can be bent to cover the box, and the top plate third side and the fourth side flaps can be further bent, and the bottom plate third side flap and the top plate fourth side are respectively the bottom plate. Can be overlaid on the 4th side flap.

  Here, in the top plate third side flap, the lid side first locking piece extends to the front plate side, and the lid side second locking piece extends to the opposite side. Similarly, in the top plate fourth side flap, the lid side third locking piece extends to the front plate side, and the lid side fourth locking piece extends to the opposite side. In the bottom plate third side flap, the box first locking piece extends to the front plate portion side, and the box second locking piece extends to the opposite side. Similarly, in the bottom plate fourth side flap, the box third locking piece extends to the front plate portion side, and the box fourth locking piece extends to the opposite side.

  Therefore, the box-side first and third locking pieces and the lid-side first and third locking pieces are bent along the inner surface of the front plate portion, and the lid-side first locking piece and the box-first The locking piece can be locked and the lid side third locking piece and the box body third locking piece can be locked. Further, the box body second and fourth locking pieces and the lid side second and fourth locking pieces are bent along the inner surface of the rear plate portion, and locked in the same manner as the front plate portion side. Can do. As a result, the top plate third side flap and the bottom plate third side flap overlap, and the top plate fourth side flap and the bottom plate fourth side flap overlap each other.

  The top plate portion has a closing piece on the second side, and the rear plate portion has a rear slit. Therefore, the box can be covered by inserting the closing piece into the rear slit.

  The packing box includes a top plate portion, a front plate portion, a bottom plate portion, a rear plate portion, a bottom plate third side flap, a bottom plate fourth side flap, a top plate third side flap, and a top plate fourth side flap. A tear line is formed and can be easily opened by tearing the tear line by hand.

  That is, the packaging box can be assembled into a packaging box simply by folding and assembling the blank, and the box shape can be maintained by the box-side locking pieces, the lid-side locking pieces, and the closing pieces. (There is no need to apply tape or glue to maintain the box shape.) Moreover, it can be opened by hand without the need for tools such as a cutter (claim 1).

  Here, the distance between the box first locking fold portion for folding the box first locking piece and the box second locking fold portion for folding the box second locking piece is defined by the bottom plate portion. A box body fourth locking fold line for folding the box body third locking piece and a box body fourth locking piece that is slightly narrower than the length of the third side and for folding the box body third locking piece. By making the interval with the part slightly narrower than the length of the fourth side of the bottom plate part, the box first and third locking pieces can be easily bent along the inner surface of the front plate part, Moreover, the box body second and fourth locking pieces can be bent along the inner surface of the rear plate portion (claim 2).

  Further, the distance between the lid-side first locking fold portion for folding the lid-side first locking piece and the lid-side second locking fold portion for folding the lid-side second locking piece is set to the box first. The lid side third locking fold part and the lid side fourth locking piece for folding the lid side third locking piece are slightly wider than the interval between the locking fold part and the box body second locking fold part. The gap between the lid side fourth locking fold part for folding is slightly wider than the gap between the box third locking fold part and the box fourth locking crease part, so that the lid side first and second The three locking pieces can be positioned along the inner surface of the front plate portion, and the lid-side second and fourth locking pieces can be positioned along the inner surface of the rear plate portion.

  The packaging box having a blank in which the interval between the respective locking folds is set as described above is arranged at positions along the inner surface of the front plate portion and the inner surface of the rear plate portion. The locking piece can be locked (claim 2).

  The rear plate portion may be folded to form a double structure (Claim 3). In this case, the rear plate portion is composed of a main rear plate (rear outer plate) connected to the bottom plate portion, a sub rear plate ( A rear inner plate), a rear plate folding portion interposed between the main rear plate and the sub rear plate, and a rear plate locking claw extending from the auxiliary rear plate to the side facing the rear plate folding portion. With such a rear plate portion, the auxiliary rear plate is folded with respect to the main rear plate at the rear plate folding portion, and the rear plate locking claw is locked to the bottom plate slit that the bottom plate portion has in the vicinity of the rear plate fold portion. Thereby, the double structure by a main backplate and a sub backplate can be formed.

  The packaging box having the blank having the rear plate portion configured as described above is configured such that the box body second locking piece and the lid side second locking piece are locked, and the box body fourth locking piece and the lid side. The fourth locking piece can be locked and sandwiched between the main rear plate and the sub rear plate (can be sandwiched between the inner surfaces of the rear plate portion).

  The packing box has the following configuration so that the locking pieces can be easily locked while the locking state cannot be easily released (Claims 4 and 5). .

  That is, the lid side first to fourth locking pieces have the lid side first to fourth locking slits, while the box body first to fourth locking pieces have the box body first to fourth locking claws. The box body locking piece and the lid side locking piece can be locked by inserting the tip of the box locking claw into the lid side locking slit.

  Here, the folds of the box first to fourth locking claws are slightly offset toward the center side of the bottom plate third side flap or the fourth side flap from the box body locking folds. Yes. Therefore, when forming the box body, if each box body locking piece is bent along the front plate portion or the rear plate portion, the front end portion of each locking claw is more than the front plate portion than each box body locking piece. It protrudes slightly to the part side or rear plate part side. Thereafter, when the lid side locking piece is inserted along the box locking piece, the locking claw protruding from the box locking piece can be inserted into the lid side locking slit.

  After the box is formed, the locking claw prevents the movement of the locking slit even if the lid side locking piece is moved toward the outside of the box (even if the assembled box is disassembled). Thus, the locked state between the lid side locking piece and the box body locking piece cannot be released (the assembled box cannot be easily disassembled).

  When the box is closed by further extending the third side top flap from the bottom plate third side flap and the bottom side fourth side flap from the bottom plate fourth side flap (38), respectively, By making the in-plate flap contact the inner surface of the top plate portion, the boundary region between the top plate portion of the packaging box and the top plate third side flap and the boundary region of the top plate portion and the top plate fourth side flap, It can be made stronger (claim 6).

  A tear line for opening the packaging box is formed on either the top plate or the bottom plate, and either the front plate or the rear plate, and is formed on the front plate or the rear plate. If the line and the tear line formed on the top or bottom plate are continuous, tear all the tear lines by tearing the tear line formed on the front or rear plate. Can be opened easily (claim 7).

  The tear line of the top plate part is substantially coincident with the boundary between the top plate part and the top plate third side flap, and the boundary between the top plate part and the top plate fourth side flap, or the tear line of the bottom plate part Can be opened at the time of opening the entire area of the top plate part or the bottom plate part as long as the boundary between the bottom plate part and the bottom plate third side flap and the boundary between the bottom plate part and the bottom plate fourth side flap are substantially the same. The contents can be easily taken out (claim 8). The blank (the packaging box) can be formed of cardboard or cardboard (Claim 9).

  According to the packaging box according to the present invention having the above-described configuration, it is not necessary to use glue for the assembly of the packaging box, or for attaching the tape, and for closing the packaging. In addition, it can be unpacked by hand without the need for tools such as cutter knives, making it easy to work, reducing the cost of unpacking work, and unpacking after unpacking Since there is no need to remove the tape from the box, the cost of recycling work can be reduced.

It is a figure which shows the schematic plane structure of the blank for forming the packaging box concerning one Example of this invention. It is a figure which shows schematic planar configurations, such as a flap and locking piece by the side of a top-plate part in a blank of FIG. 1, and a flap and locking piece by the side of a baseplate part. It is a figure which shows the plane schematic structure of the box locking piece vicinity in the blank of FIG. 1, The figure (a) shows the state before bending a box locking piece, The figure (b) is a box locking The state which bent the piece is shown, The same figure (c) shows the state which bent the box latching claw further. FIG. 4A is a diagram showing a schematic cross-sectional configuration in a state where the bottom plate third side flap, the box first locking piece, and the box first locking claw are bent as shown in FIG. 3C. FIG. 4B is a diagram showing a state where the lid side first locking piece is inserted and locked between the front plate portion and the box first locking piece. In the blank of FIG. 1, it is a figure which shows the state which bent the backplate part with respect to the baseplate part, and latched the backplate latching claw of the baseplate part to the baseplate slit of the baseplate part. It is a figure which shows the folding of a box latching piece and a baseplate 3rd side flap at the time of assembling a packaging box with the blank of FIG. It is a figure which shows the insertion of the box latching piece by a backplate part at the time of assembling a packaging box with the blank of FIG. It is a figure which shows formation of a box body at the time of assembling a packaging box with the blank of FIG. It is a figure which shows the superimposition of the top plate 4th side flap and the bottom plate 4th side flap at the time of assembling a packaging box with the blank of FIG. It is a figure which shows the schematic external appearance structure of the packaging box assembled with the blank of FIG. It is a figure which shows the state which opened the packaging box assembled with the blank of FIG.

  Hereinafter, a packaging box according to the present invention will be described with reference to the drawings.

<Schematic configuration of blank>
FIG. 1 shows a schematic plan configuration of a blank 2 of a packaging box 1 according to an embodiment of the present invention. The blank 2 has a top plate portion 10, a front plate portion 20, a bottom plate portion 30, and a rear plate portion 40. The first side 10a of the substantially quadrilateral top plate portion 10 is in contact with the first side 20a of the front plate portion 20, and is closed on the second side 10b side facing the first side 10a of the top plate portion 10. The piece 10t extends. The second side 20b facing the first side 20a of the front plate 20 is in contact with the first side 30a of the bottom plate 30 and the second side 30b facing the first side 30a of the bottom plate 30 is the rear plate. 40 is in contact with the first side 40a.

  The first side 10 a of the top plate part 10 and the first side 20 a of the front plate part 20 that are in contact with each other form a top plate fold part, and the second side 20 b of the front plate part 20 and the first side 30 a of the bottom plate part 30. Is a front plate fold portion, and the second side 30b of the bottom plate portion 30 and the first side 40a of the rear plate portion 40 are rear plate fold portions. The blank 2 is typically formed of cardboard, but is not limited to cardboard and may be formed of cardboard or the like.

<Rear plate part>
The rear plate portion 40 includes a rear outer plate 41, a rear inner plate 42, and a rear plate folded portion 43. The rear outer plate 41 is connected to the bottom plate portion 30, and the rear plate 41 and the rear inner plate 42 are interposed between them. The rear plate folding portion 43 is interposed. The inner surface 40x of the rear plate portion 40 is the inner surface of each of the rear outer plate 41, the rear inner plate 42, and the rear plate folding portion 43.

  The rear plate folding portion 43 is provided with a rear slit 40 s for inserting the closing piece 10 t of the top plate portion 10. Two rear plate locking claws 40t extend on the second side 40b side facing the first side 40a of the rear plate portion 40. And in the boundary area | region of the baseplate part 30 and the backplate part 40, the baseplate slit 30s for latching the backplate latching claw 40t is provided.

<Flaps on the top and bottom plates>
A top plate third side flap 11 is connected to the third side 10c of the top plate part 10, and the third side 10c is a top plate third side fold part. A top plate fourth side flap 12 is connected to the fourth side 10d facing the third side 10c, and the fourth side 10d is a top plate fourth side fold. A bottom plate third side flap 31 is connected to the third side 30c of the bottom plate portion 30, and the third side 30c is a bottom plate third side fold portion. Then, a bottom plate fourth side flap 32 is connected to the fourth side 30d facing the third side 30c, and the fourth side 30d is a bottom plate fourth side fold. Further, the bottom plate third side flap 31 and the bottom plate fourth side flap 32 have top plate flaps 37 and 38 extending to the side opposite to the bottom plate part 30, respectively.

<Tear line>
A first tear line 17 and a second tear line 18 are formed on the top plate portion 10, and a third tear line 21 and a fourth tear line 22 are formed on the front plate portion 20. (These tear lines are formed by perforations, for example). The first tear line 17 formed at the boundary (top plate third side fold part) between the top plate portion 10 and the top plate third side flap 11 has one end 17a thereof and one end 21a of the third tear line 21. The second tear line 18 that is continuous and formed at the boundary (top plate fourth side fold part) between the top plate 10 and the top plate fourth side flap 12 has one end 18a at the fourth tear line. 22 is continuous with one end 22a. Then, the other end 21b of the third tear line and the other end 22b of the fourth tear line 22 define the tear start point 23 in the vicinity of the second side 20b of the front plate part 20 in contact with the first side 30a of the bottom plate part 30. Is continuous through.

  Here, the front plate 20 has a region 24 defined by the first side 10 a, the third tear line 21, the fourth tear line 22, and the tear start point 23 of the top plate 10 connected to the top plate 10. The remaining region 25 is connected to the bottom plate portion 30.

<Land side locking piece and box side locking piece>
As shown in FIG. 2, the top plate third side flap 11 is on the side facing the lid side first locking piece 13 and the lid side first locking piece 13 extending to the bottom plate third side flap 31 side. An extended lid-side second locking piece 14 is provided. The top plate fourth side flap 12 includes a lid side third locking piece 15 extending to the bottom plate fourth side flap 32 side, and a lid side fourth extending to the side opposite to the lid side third locking piece 15. A locking piece 16 is provided. Furthermore, the lid side first to fourth locking pieces 13 to 16 have lid side first to fourth locking slits 13s to 16s, respectively.

  On the other hand, the bottom plate third side flap 31 is a box body first locking piece 33 extending to the top plate third side flap 11 side, and a box body extending to the side opposite to the box body first locking piece 33. A second locking piece 34 is provided. The bottom plate fourth side flap 32 includes a box third locking piece 35 extending to the top plate fourth side flap 12 side and a box fourth fourth extending to the side opposite to the box third locking piece 35. A locking piece 36 is provided. Further, the box body first to fourth locking pieces 33 to 36 have box body first to fourth locking claws 33t to 36t, respectively.

<Folded part of lid side locking piece and box side locking piece>
The box first and third locking pieces 33, 35 are bent along the inner surface 20 x of the front plate portion 20, and the box second and fourth locking pieces 34, 36 are the inner surface 40 x of the rear plate portion 40. It can be bent along. Therefore, the distance between the box body first locking crease portion 33 a that folds the box body first locking piece 33 and the box body second locking fold portion 34 a that folds the box body second locking piece 34 is the distance between the bottom plate portion 30. A box body fourth locking fold portion 35a for folding the box body third locking piece 35 and a box body fourth locking piece 36 for folding the box body third locking piece 36 are slightly narrower than the length of the third side 30c. The distance from 36 a is slightly narrower than the length of the fourth side 30 d of the bottom plate portion 30.

  On the other hand, the distance between the lid-side first locking fold portion 13a and the lid-side second locking fold portion 14a is the same as the interval between the box first and second locking fold portions 33a, 34a. Further, the interval is substantially equal to the length of the third locking pieces 33 and 35 plus the thickness. Similarly, the interval between the lid-side third locking fold portion 15a and the lid-side fourth locking fold portion 16a is the same as the interval between the box body third and fourth locking fold portions 35a, 36a, and the box body second and The spacing is substantially equal to the length of the fourth locking pieces 34 and 36 plus the thickness.

  Therefore, the box body first locking piece 33 is bent along the inner surface 20x of the front plate portion 20, and the lid side first locking piece 13 is bent along the inner surface 20x of the front plate portion 20 (in detail). Both the locking pieces can be easily locked) by bending them so as to be inserted between the box first locking piece 33 and the inner surface 20x of the front plate portion 20. The same holds for the box third locking piece 35 and the lid side third locking piece 15.

  Further, the box second locking piece 34 is bent along the inner surface 40x of the rear plate portion 40, and the lid side second locking piece 14 is bent along the inner surface 40x of the rear plate portion 40 (specifically, Both the locking pieces can be easily locked) by bending them so as to be inserted between the box second locking piece 34 and the inner surface 40x of the rear plate portion 40. The same holds for the box fourth locking piece 36 and the lid-side fourth locking piece 16.

<Locking claw and locking slit>
Next, the box body first to fourth locking pieces 33 to 36, the box body first to fourth locking folds 33a to 36a, the box body first to fourth locking claws 33t to 36t, and the box body The positional relationship of the crease portions 33u to 36u of the locking claws will be described by taking the box first locking piece 33 as an example.

  Fig.3 (a) is a figure which shows the plane schematic structure of the box 1st locking piece 33 vicinity in the blank 2 in the unfolding state. As shown in the figure, the fold 33u of the box first locking claw 33t is closer to the center side (lower side in the figure) of the bottom plate third side flap 31 than the box first locking fold 33a. There is a slight offset. The rectangular box first locking claw 33t is connected to the bottom plate third side flap 31 at the fold part 33u, while the remaining three sides are cut between the box first locking piece 33, The side facing the crease 33u is the box body first locking claw tip 33x.

<< Formation of packing boxes >>
Next, formation of the packaging box 1 and the like will be described.

<Preparation for folding the blank>
First, the box first locking piece 33 will be described as an example with respect to preparation for bending the box first to fourth locking pieces 33 to 36. As shown in FIG. 3 (b), the box first locking fold 33a is first valley-folded so that the box first locking claw 33t is not bent, and the box first locking piece 33 is fixed to the bottom plate. It overlaps with the third side flap 31. Then, in the box first locking piece 33, the region where the box first locking claw 33t existed before the above bending became the window 33s, and the box first locking claw tip 33x was in contact therewith. The portion becomes the box body first locking piece window tip 33y.

  Further, as shown in FIG. 3 (c), when the box first locking claw 33t is valley-folded at the fold portion 33u, a region near the box first locking claw tip 33x becomes a box first locking piece window. It overlaps with the vicinity of the tip 33y. In this way, each box body locking piece and each box body locking claw with the creases are returned to a substantially flat surface.

  Here, FIG. 4A is a schematic cross-sectional configuration of the bottom plate third side flap 31, the box body first locking piece 33, and the box body first locking claw 33t folded as shown in FIG. 3C. (It is a schematic cross-sectional configuration of the XX region of FIG. 3C).

  Next, preparation for bending the rear plate portion 40 will be described.

  When the rear plate portion 40 is valley-folded at the rear plate fold portion located at the boundary between the bottom plate portion 30 and the rear plate portion 40 and the rear plate folding portion 43, the rear plate locking claw 40t is moved as shown in FIG. The bottom plate slit 30s can be locked. At this time, a gap 40 w that is substantially equal to the width of the rear plate folded portion 43 is formed between the rear outer plate 41 and the rear inner plate 42. In the bending preparation stage, the rear plate locking claw 40t is not yet locked to the bottom plate slit 30s.

  Similarly, the top plate portion 10 is valley-folded with respect to the front plate portion 20 to give a crease. At this time, the top plate third side flap 11 is valley-folded with respect to the top plate portion 10 to form a crease, and the lid side first and second locking pieces 13, 14 are valleys with respect to the top plate third side flap 11. Fold and crease (the same applies to the top plate fourth side flap 12, the lid side third and fourth locking pieces 15 and 16), and the closing piece 10t is valley-folded with respect to the top plate 10 and folded. Put on a heel (none shown).

<Formation of packing box>
Next, assembly of the packaging box 1 by bending a blank will be described. First, as shown in FIG. 6, the box first and second locking pieces 33, 34 are bent so as to be orthogonal to the bottom plate third side flap 31, and the box first and second locking pieces 33, 34 are folded. The bottom plate third side flap 31 is bent substantially perpendicularly to the bottom plate portion 30 so that is located on the bottom plate portion 30 side.

  Next, the rear plate folded portion 43 is valley-folded with respect to the inner surface 40x of the rear plate portion 40 (see FIG. 5), while the box body second and fourth locking pieces 34, 36 are moved to the rear outer plate 41 and the rear. The rear plate locking claw 40t is locked to the bottom plate slit 30s by being pinched between the inner plate 42 (pinched along the inner surface 40x of the rear plate portion 40) (FIG. 7).

  Next, as shown in FIG. 8, the front plate portion 20 is bent until it contacts the bottom plate third side flap 31 and the bottom plate fourth side flap 32. Then, the box body first and third locking pieces 33, 35 are positioned so as to be along the inner surface 20x of the front plate portion 20, and the bottom plate portion 30, the front plate portion 20, the bottom plate third side and the fourth side flap 31, The box 3 can be formed by 32 (in FIG. 8, the top plate 10 for closing the box 3 is still open). In FIG. 8, the rear plate portion 40 is shown on the front side.

  Next, as shown in FIG. 9, the box 3 is closed by the top plate portion 10. At this time, the closing piece 10t of the top plate 10 is inserted into the rear slit 40s of the rear plate 40. Further, the top plate fourth side flap 12 is bent toward the bottom plate fourth side flap 32. At this time, the lid-side third locking piece 15 is inserted along the inner surface 20x of the front plate portion 20, and the lid-side fourth locking piece 16 is inserted along the inner surface 40x of the rear plate portion 40. The bottom plate third side flap 31 side is also bent in the same manner (note that FIG. 9 shows that the top plate third side flap 11 has already been bent toward the bottom plate third side flap 31 and the rear plate portion 40 is It is written on the front side.)

  As shown in FIG. 8, the box body first and third locking pieces 33, 35 are positioned on the inner surface 20x side of the front plate portion 20 so as to be substantially in contact with each other (in FIG. 8, the box body first locking). 4 (b), the lid-side first locking piece 13 is inserted between the box first locking piece 33 and the inner surface 20x of the front plate portion 20. As shown in FIG. (The positional relationship between the two locking pieces is that the distance between the lid-side first locking fold portion 13a and the lid-side second locking fold portion 14a is such that the box body first and second locking folds are This is realized by the interval substantially equal to the length obtained by adding the thickness of the box first and third locking pieces 33, 35 to the interval between the portions 33a, 34a).

  As a result, the lid-side first locking slit 13s (lid-side first locking piece 13) and the box body first locking claw tip 33x (box body first locking piece 33) are locked. The lid side third locking piece 15 and the box body third locking piece 35 are similarly locked. At this time, the lid side first locking piece 13 is inserted from the box body first locking fold 33a side, and the box body first locking claw tip 33x and the lid side first locking slit 13s are locked. Therefore, even if the lid-side first locking piece 13 is pulled out to the box-side first locking fold 33a side, the movement of the lid-side first locking piece 13 is prevented (the lid-side third locking piece). The same applies to the stopper piece 15).

  Similarly, on the inner surface 40x side of the rear plate portion 40, the lid side second locking piece 14 and the box body second locking piece 34, and the lid side fourth locking piece 16 and the box body fourth locking are also provided. The pieces 36 are respectively locked and the lid side second and fourth locking pieces 14 and 16 cannot be pulled out.

  Specifically, the box second locking piece 34 is positioned between the rear outer plate 41 and the rear inner plate 42 (both plates have a gap W (FIG. 5)) (the rear plate portion 40). Is positioned along the inner surface 40x). The lid-side second locking piece 14 is inserted between the rear outer plate 41 having such a positional relationship and the box body second locking piece 34 (this positional relationship is determined by the lid-side first locking crease. The distance between the portion 13a and the lid-side second locking fold portion 14a is equal to the interval between the box first and second locking fold portions 33a, 34a, and the thickness of the box first and third locking pieces 33, 35. This is realized by the interval being approximately equal to the length plus the length.)

  Thus, the blank 2 can assemble the packaging box 1 shown in FIG. 10 without using a tape and an adhesive agent by bending a crease part by hand. In the assembled packaging box 1, the top plate third side flap 11 and the bottom plate third side flap 31 overlap (the top plate fourth side flap 12 and the bottom plate fourth side flap 32 are the same), and the rear plate part 40 is The rear outer plate 41 and the rear inner plate 42 have a double structure. Thus, the packaging box 1 is strong because three of the six surfaces have a double structure.

  Moreover, the place latched by the packing box 1 is four places, the lid side 1st-4th latching pieces 13-16, and the box body 1st-4th latching pieces 33t-36t, and the top-plate part 10. There are a total of five locations, one for the closing piece 10t and the rear slit 40s for the top plate portion 10. Since each system stop point is a triple or quadruple structure, the packaging box 1 is strengthened and the contents of the packaging box 1 are shielded from the outside field of view (of course, there is no gap at each fold portion in the blank 2). .

  Slightly, a gap may remain between the top plate portion 10 and the top plate portion 10 only in a region where the closing pieces 10t are not connected on the second side 10b of the top plate portion 10. Such a gap can also narrow the gap between the top plate 10 and the rear plate 40 by widening the width of the closing piece 10t of the top plate 10. Further, the gap between the top plate portion 10 and the rear plate portion 40 is blocked in the vicinity of the bottom plate third side and fourth side flaps 31 and 32 where the top plate inner flaps 37 and 38 are in contact with the inner surface of the top plate portion 10. In addition, since the rear plate portion 40 has a thickness greater than or equal to the rear outer plate 41, the rear inner plate 42, and the gap 40w, the overlap between the rear plate folding portion 43 and the top plate portion 10 is the top plate portion 10 and the rear plate. Block the gap between the portions 40.

<Opening etc.>
As shown in FIG. 10, the tear line of the blank 2 is such that the first tear line 17 formed at the boundary between the top plate part 10 and the top plate third side flap 11 is the third tear line of the front plate part 20. The second tear line 18 that is continuous with the line 21 and formed at the boundary between the top plate portion 10 and the top plate fourth side flap 12 is also continuous with the fourth tear line 22. The other end 21 b of the third tear line and the other end 22 b of the fourth tear line are located near the second side 20 b of the front plate 20 in contact with the first side 30 a of the bottom plate 30 via the tear start point 23. Are continuous.

  Therefore, when the tear start point 23 of the front plate 20 is grasped with the fingertip and the tear line is torn, the front plate 20 is connected to the region 24 connected to the top plate 10 and the bottom plate 30 as shown in FIG. And a region 25 connected to the region 25. The top plate 10 is separated from the top plate third side flap 11 and the top plate fourth side flap 12. Then, the closing piece 10t of the top plate portion 10 can be easily pulled out from the rear slit 40s of the rear plate portion 40. That is, the packing box 1 can be opened.

  In the front plate portion 20, the unpacked packaging box 1 is thus engaged with the lid-side first locking piece 13 of the top plate third side flap 11 and the box body first locking piece 33 of the bottom plate third side flap 31. The locked state is released, and the locked state between the lid side third locking piece 15 of the top plate fourth side flap 12 and the box body third locking piece 35 of the bottom plate fourth side flap 32 is released (see FIG. 11). On the other hand, on the rear plate portion 40 side, the locked state between the lid side second locking piece 14 of the top plate third side flap 11 and the box body second locking piece 34 of the bottom plate third side flap 31 is maintained. Further, the locked state of the lid-side fourth locking piece 16 of the top plate fourth side flap 12 and the box fourth locking piece 36 of the bottom plate fourth side flap 32 is maintained (FIG. 11).

  As described above, the packaging box 1 can be easily assembled by hand without using tape or adhesive, is strong and has high confidentiality, and can be easily opened by hand without using tools. It can be opened.

  The packaging box concerning this invention is not limited to the said Example, It can deform | transform and implement suitably, without changing the meaning.

  For example, the locking claw is formed not on the box body first to fourth locking piece side but on the lid side first to fourth locking piece side, and the locking slit is not on the lid side first to fourth locking piece side. You may form in a box 1st thru | or 4th latching piece.

  As described above, according to the present invention, the glue for assembling the packaging box, the tape sticking operation, the glue for closing, and the like are not necessary, so the cost for assembling the packaging box is reduced. It can be unpacked by hand without the need for tools such as a cutter knife, and the work can be done easily and the cost of unpacking can be reduced. Since it is not necessary to remove the above, the cost of recycling work can be reduced.

  Therefore, the present invention is useful in all industries such as distribution business, various retail businesses, and building businesses.

DESCRIPTION OF SYMBOLS 1 Packing box 2 Blank 3 Box 10 Top plate part 10t Top plate part closure pieces 10a to 10d First side to fourth side 11 and 12 of top plate part Top plate third side flap, top plate fourth side flap 13 -16 lid side first to fourth locking pieces 13a to 16a lid side first to fourth locking folds 13s to 16s lid side first to fourth locking slits 17, 18 first tear line, second Tear line 20 front plate part 20a, 20b first side of front plate part, second side 20x of front plate part inner surface 21, 22 of front plate part third tear line, fourth tear line 30 bottom plate part 30a- 30d First side to fourth side 30s of bottom plate part Bottom plate slits 31, 32 Bottom plate third side flaps, bottom plate fourth side flaps 33 to 36 Box body first to fourth locking pieces 33a to 36a Box body first to first Four locking crease portions 33 s to 36 s 1st to 4th locking piece windows 33 t to 36 t 1st to 4th box Claws 33u to 36u Box body first to fourth locking claw folds 33x to 36x Box body first to fourth locking claw tips 33y to 36y Box body first to fourth locking piece window tips 37, 38 Top plate inner flap 40 Rear plate portion 40s Rear slit 40x Rear plate inner surface 40w Gap 41 between main rear plate (rear outer plate) and auxiliary rear plate (rear inner plate) Main rear plate (rear outer plate)
42 Sub-rear plate (rear inner plate)
43 Rear plate folding section

Claims (9)

A substantially quadrilateral top plate portion, a bottom plate portion substantially similar to the top plate portion, and a substantially quadrilateral front plate interposed between the first side of the top plate portion and the first side of the bottom plate portion. A bottom plate connected to the second side opposite to the first side of the bottom plate, a third side flap connected to the third side of the bottom plate, and a fourth bottom plate connected to the fourth side. A packaging box formed by bending a blank having side flaps,
The blank is a closing piece formed on the second side facing the first side of the top plate part, a top plate crease located at the boundary between the top plate part and the front plate part, A front plate fold portion located at a boundary between the front plate portion and the bottom plate portion, a rear plate fold portion located at a boundary between the bottom plate portion and the rear plate portion,
A bottom plate third side fold portion located at a boundary between the bottom plate portion and the bottom plate third side flap and a bottom plate fourth side fold portion located at a boundary between the bottom plate portion and the bottom plate fourth side flap;
A top plate third side flap connected to the third side of the top plate portion, a top plate fourth side flap connected to the fourth side of the top plate portion, the top plate portion and the top plate third side flap; A top plate third side fold portion located at the boundary of the top plate and a top plate fourth side fold portion located at a boundary between the top plate portion and the top plate fourth side flap;
A lid-side first locking piece extending from the top plate third side flap to the front plate portion side and a lid-side second locking piece extending to the side opposite to the lid-side first locking piece; A lid-side third locking piece extending from the top plate fourth side flap to the front plate side and a lid-side fourth locking piece extending to the side opposite to the lid-side third locking piece;
A box body first locking piece extending from the bottom plate third side flap to the front plate portion side and a box body second locking piece extending to the side opposite to the box body first locking piece; A box third locking piece extending from the bottom plate fourth side flap to the front plate portion side, a box fourth locking piece extending to the side opposite to the box third locking piece, and the rear A rear slit provided in the plate portion,
When the rear plate portion, the front plate portion, the bottom plate third side flap, and the bottom plate fourth side flap are bent with respect to the bottom plate portion to form a box body in which an area facing the bottom plate portion is opened. In addition,
Bending the box first locking piece, the box third locking piece, the lid side first locking piece and the lid side third locking piece along the inner surface of the front plate part, and Bending the box second locking piece, the box fourth locking piece, the lid side second locking piece and the lid side fourth locking piece along the inner surface of the rear plate part,
Furthermore, the lid side first locking piece is locked to the box body first locking piece, the lid side second locking piece is locked to the box body second locking piece, and the lid side third locking piece is The locking piece is locked to the box third locking piece, and the lid side fourth locking piece is locked to the box fourth locking piece, so that the top plate is fixed to the bottom plate third side flap. While overlapping the plate third side flap, forming the box by overlapping the top plate fourth side flap on the bottom plate fourth side flap,
The box can be closed by inserting the closing piece of the top plate into the rear slit,
Any of the top plate portion, the front plate portion, the bottom plate portion, the rear plate portion, the bottom plate third side flap, the bottom plate fourth side flap, the top plate third side flap, and the top plate fourth side flap A packaging box, wherein a crab tear line is formed. The distance between the box first locking fold portion for folding the box first locking piece and the box second locking fold portion for folding the box second locking piece is the first plate of the bottom plate portion. Slightly narrower than the length of the three sides,
The distance between the box third locking fold for folding the box third locking piece and the box fourth locking fold for folding the box fourth locking piece is the second plate of the bottom plate. Slightly narrower than the length of the four sides,
The distance between the lid-side first locking fold portion for folding the lid-side first locking piece and the lid-side second locking fold portion for folding the lid-side second locking piece is the first box body. Slightly wider than the gap between the locking fold and the box second locking fold,
The distance between the lid-side third locking fold portion for folding the lid-side third locking piece and the lid-side fourth locking fold portion for folding the lid-side fourth locking piece is the third box body. The packaging box according to claim 1, wherein the packing box is slightly wider than a distance between the locking fold portion and the box body fourth locking fold portion. In the packaging box according to claim 1 or 2,
The rear plate portion includes a main rear plate connected to the bottom plate portion, a sub rear plate, a rear plate folded portion interposed between the main rear plate and the sub rear plate, and the sub rear plate A rear plate engaging claw extending from the side opposite to the rear plate folded portion, and the bottom plate portion has a bottom plate slit provided in the vicinity of the rear plate fold portion,
When forming the box body, the rear plate portion can be folded at the rear plate folding portion so that the rear plate locking claw can be locked to the bottom plate slit, and the box second locking piece The packaging box, wherein the box fourth locking piece, the lid side second locking piece and the lid side fourth locking piece can be sandwiched between the main rear plate and the sub rear plate. The lid side first to fourth locking pieces have lid side first to fourth locking slits, and the box body first to fourth locking pieces have box body first to fourth locking claws. And
The box first to fourth locking claws are slightly closer to the center side of the bottom plate third side flap or fourth side flap than the box first to fourth locking folds. Offset,
When the box body is formed, if the box body first to fourth locking pieces are bent, the front end of the box body first locking claw is more than the front plate than the box body first to fourth locking pieces. While projecting slightly to the part side or the rear plate part side, the box body first to fourth locking claw can be easily inserted into the lid side first to fourth locking slit,
After the box is formed, if the lid side first to fourth locking pieces are moved toward the outside of the box, the lid side first to fourth locking slits due to the movement Movement is prevented by the box first to fourth locking claws, and the lid side first to fourth locking pieces cannot be detached from the box first to fourth locking pieces. The packaging box according to any one of claims 1 to 3.   5. The packaging box according to claim 4, wherein a fold portion of the box body first to fourth locking claw is more than the box body first to fourth locking fold portion, the third side of the top plate or the fourth side. A packaging box characterized by being slightly offset toward the center side of the side flap. In the packaging box according to any one of claims 1 to 5,
The bottom plate third side flap further includes a third side top plate flap extending from a side facing the bottom plate portion, and the bottom plate fourth side flap extends from a side facing the bottom plate portion. It further has a fourth side top plate flap,
When the box is closed, the third side and fourth side top plate flaps come into contact with the inner surface of the top plate part.   The tear line is formed on either the top plate portion or the bottom plate portion, and on either the front plate portion or the rear plate portion, and is formed on the top plate portion or the bottom plate portion. The packaging box according to any one of claims 1 to 6, wherein a tear line and a tear line formed on the front plate portion or the rear plate portion are continuous. The tear line formed in the top plate portion is formed substantially coincident with the boundary between the top plate portion and the top plate third side flap and the boundary between the top plate portion and the top plate fourth side flap. Being
Alternatively, the tear line formed in the bottom plate portion is formed substantially coincident with the boundary between the bottom plate portion and the bottom plate third side flap and the boundary between the bottom plate portion and the bottom plate fourth side flap. The packaging box according to claim 7, wherein the packaging box is characterized.   The packaging box according to claim 1, wherein the blank is formed of cardboard or cardboard.

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