JP2018203277A - Packaging box and blank sheet of packaging box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wraparound type packaging box that can be reused as a packaging box with a closed lid, and a blank sheet of the packaging box. A packaging box (1) includes a bottom plate (10), a pair of front and rear end walls (11, 12), a top plate (15), and a pair of left and right side walls (13, 14). The side walls 13 and 14 include front and rear side flaps 21 and 22, a lower flap 32, and an upper flap 31. The upper flap 31 and the lower flap 32 are attached to the outer surfaces of the front and rear side flaps 21, 22. In at least one surface of the bottom plate 10 and the top plate 15, perforations 17a for unpacking are formed between the edges of the side walls 13 and 14. [Selection diagram] Figure 1

Description

  The present invention relates to a packaging box and a blank sheet of the packaging box.

Conventionally, cardboard packaging boxes in which a plurality of products such as cut sheet books are packed are widely distributed. As such a cut sheet book packaging box, a wrap-around packaging box is often used.
A wrap-around packaging box is made of a corrugated sheet in which a top plate, a bottom plate, and a pair of end walls are connected via a folding ruled line. At the time of packaging, a sheet is folded so as to enclose a plurality of cut sheets, and the end wall and the top plate are glued and joined with a joining piece to form a peripheral wall. And while folding the inner flap extended from a both-ends wall, the both sides | surfaces of a surrounding wall are sealed by folding the outer flap extended from a top plate and a baseplate on an inner flap, and gluing it (for example, refer patent document 1).

  The wrap-around packaging box can be unpacked, for example, by peeling off the glued outer flap or joining piece.

  On the other hand, an A-type box is known as a general packaging box. The A-type box has an inner flap and an outer flap above and below a box that forms a rectangular parallelepiped. The A-type box is packed with a taped portion of the outer flaps. The A-type box can be easily unpacked by peeling off the tape.

JP 2012-246025 A

  The packaging box of Patent Document 1 described above, when the outer flap and the joining piece are peeled off and once unpacked, remains in an open state without being held in a state where the side surfaces and the top plate are closed. For this reason, there existed a subject that it was difficult to reuse as a packaging box with the lid | cover closed.

  In this regard, the A-type box described above can be reused as a packaging box with the lid closed by closing the outer flap after unpacking and tape-fastening the mating part. However, since the A-type box needs to be taped at the time of packing, there is a problem that the productivity and workability are inferior to those of the wrap-around type packaging box.

  This invention solves an above-described subject, and makes it a subject to provide the wrap-around type packaging box which can be reused easily as a packaging box with the lid | cover closed, and the blank sheet | seat of a packaging box.

  In order to solve the above-mentioned problems, the packaging box of the present invention is a wrap-around packaging box, and includes a bottom plate, a pair of front and rear end walls connected to front and rear edges of the bottom plate, and one of the ends. A top plate provided continuously with the upper edge of the wall and a pair of left and right side walls are provided. The side wall includes front and rear side flaps that are connected to the both end walls, a lower flap that is connected to the bottom plate, and an upper flap that is connected to the top plate. The upper flap and the lower flap are adhered to the outer surfaces of the front and rear side flaps. In at least one surface of the bottom plate and the top plate, a perforation for unpacking is formed between edges of the both side walls.

In the packaging box of this invention, it can unpack by opening the perforation for unpacking formed in one surface of a bottom plate and a top plate. In this case, since the flap is not stuck on the bottom plate and the top plate, the perforation can be smoothly opened. After that, when the unpacked packaging box is reused, the surface opened by the perforation is closed and the closed surface is taped. Thereby, the open surface is held in a closed state. Therefore, it can be reused as a packaging box with the lid closed. In addition, when tape-fixing, it is good to close the adjacent surface with one tape along a perforation.
Moreover, when the perforation for an unpacking is formed in the surface of both a bottom plate and a top plate, a packaging box can be folded flat by opening a perforation of both surfaces. Therefore, storage is easy.

  Further, in the packaging box described above, the perforation for unpacking is a first perforation that extends linearly between edges of both side walls and divides the surface into two, and the first perforation. A pair of second perforations formed along the edges of the side walls intersect each other.

  In this configuration, the surface opened along the first perforation can be divided into two, and then the surface divided into two along the second perforation can be opened to open the package. After that, when the unpacked packaging box is reused, the two divided surfaces are closed and the closed surface is taped. As a result, the opening is held in a closed state. Therefore, it can be reused as a packaging box with the lid closed. In this case, the two divided surfaces should be closed together with one tape.

  The packaging box has two parallel first perforations, and a zipper portion extends between the first perforations. In this configuration, the zipper part can be easily opened by picking it with fingers and unpacking can be performed smoothly.

In the packaging box, the perforation for unpacking extends diagonally.
In this structure, it can unpack by opening a perforation along a diagonal. Thereafter, when the unpacked packaging box is reused, the surface opened by the perforation is closed and the closed surface is taped. As a result, the opening is held in a closed state. Therefore, it can be reused as a packaging box with the lid closed. In this case, since it is only necessary to tape the diagonal line, it is easy to perform the tape fixing operation.
Moreover, when the perforation extended on a diagonal line is formed in the surface of both a baseplate and a topplate, a packaging box can be folded flat by cutting open the perforation of both surfaces. Therefore, storage is easy.

  In the packaging box, the unpacking perforation is a first perforation that extends linearly at least between the edges of the both side walls and divides the surface into two. Knob portions that are continuous with the first perforation are formed on both side walls. A second perforation formed on each side wall intersects each knob portion.

  In this configuration, the knob portion is pinched and separated, and the surface opened along the first perforation is divided into two starting from the hole formed thereby, and the second perforation on both side walls is opened to open the package. be able to. After that, when the unpacked packaging box is reused, the two divided surfaces are closed and the closed surface is taped. As a result, the opening is held in a closed state. Therefore, it can be reused as a packaging box with the lid closed. In this case, the two divided surfaces and both side walls are preferably closed together with one tape.

  The blank sheet of the packaging box of the present invention is a blank sheet of a wrap-around packaging box that includes a bottom plate, a top plate, a pair of end walls, and a pair of side walls. In at least one surface of the bottom plate and the top plate, a perforation for unpacking is formed between edges of the both side walls.

In the packaging box formed using the blank sheet of the packaging box of the present invention, unpacking can be performed by opening a perforation for unpacking formed in one surface of the bottom plate and the top plate. In this case, it can cut open between the edge parts of both side walls, and unpacking is easy to perform. When reusing the unpacked packaging box, close the open surface by perforation and tape the closed surface. Thereby, the open surface is held in a closed state. Therefore, it can be reused as a packaging box with the lid closed. In addition, when tape-fixing, it is good to close the adjacent surface with one tape along a perforation.
Moreover, when the perforation for an unpacking is formed in the surface of both a bottom plate and a top plate, a packaging box can be folded flat by opening a perforation of both surfaces. Therefore, storage is easy.

  In the present invention, a wrap-around type packaging box that can be reused as a packaging box with a closed lid and a blank sheet of the packaging box are obtained.

It is the perspective view which looked at the packaging box which concerns on 1st embodiment of this invention from the front upper left. It is a blank sheet of a packaging box concerning a first embodiment of the present invention. It is the figure which showed the packaging box which concerns on 1st embodiment of this invention, (a) is a perspective view which shows the state turned upside down at the time of unpacking, (b) is the perspective view which shows the state which opened the strip | belt-shaped zipper part FIG. It is the figure which showed the packaging box which concerns on 1st embodiment of this invention, (a) is a perspective view which shows the state which opened and opened the bottom plate divided | segmented by the zipper part, (b) is a bottom plate at the time of reuse. It is a perspective view which shows the state which closed and taped. It is the perspective view which looked at the packaging box which concerns on 2nd embodiment of this invention from the front upper left. It is a blank sheet of a packaging box concerning a second embodiment of the present invention. It is the figure which showed the packaging box which concerns on 2nd embodiment of this invention, (a) is a perspective view which shows the state turned upside down at the time of unpacking, (b) is the state which cut the perforation and opened the bottom plate It is a perspective view shown. It is the figure which showed the packaging box which concerns on 2nd embodiment of this invention, (a) is a perspective view which shows the state which closed and taped the baseplate at the time of reuse, (b) is the perforation of a baseplate and a topplate, and cuts open It is a figure which shows the state folded up flatly. It is the perspective view which looked at the packaging box concerning a third embodiment of the present invention from the front upper left. It is a blank sheet of a packaging box concerning a third embodiment of the present invention. It is the figure which showed the packaging box which concerns on 3rd embodiment of this invention, (a) is a perspective view which shows the state turned upside down at the time of unpacking, (b) is the perspective view which shows the state which cut | disconnected one knob part. FIG. It is the figure which showed the packaging box which concerns on 3rd embodiment of this invention, (a) is the state which opened and opened the bottom plate divided | segmented by the 1st perforation and the 2nd perforation, and the part continuous to this. (B) is a perspective view showing a state in which the bottom plate is closed and taped when reused. It is the perspective view which looked at the packaging box which concerns on 4th embodiment of this invention from the front upper left. It is a blank sheet of a packaging box concerning a fourth embodiment of the present invention. It is the figure which showed the packaging box which concerns on 4th embodiment of this invention, (a) is a perspective view which shows the state which turned up the rear end wall at the time of unpacking, (b) is the state which cut off one knob part FIG. It is the figure which showed the packaging box which concerns on 4th embodiment of this invention, (a) opened the rear end wall divided | segmented by the 1st perforation and the 2nd perforation, and the part continuous to this, and unpacked it. The perspective view which shows a state, (b) is a perspective view which shows the state which closed the tape and closed the baseplate at the time of reuse.

Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In the following description, the front / rear / left / right / up / down directions are set for convenience in describing the packaging box, and do not limit the configuration of the packaging box.

(First embodiment)
As shown in FIG. 1, the packaging box 1 is a rectangular parallelepiped box of a wraparound method. The packaging box 1 includes a bottom plate 10, a pair of front and rear end walls 11 and 12, a pair of left and right side walls 13 and 14, and a top plate 15. After packing a product such as a cut sheet book C (not shown) (see FIG. 4A), the packaging box 1 is turned upside down, for example, as shown in FIG. Can be transported with the top plate 15 being lowered.

As shown in FIG. 2, the packaging box 1 is formed by performing a mountain fold and a valley fold on each ruled line of a blank sheet S cut out from a single cardboard sheet. The blank sheet S shown in FIG. 2 is arranged so that the inner surface side can be seen.
Each ruled line (folded line) of the blank sheet S is a linear groove formed by pressing the surface of the blank sheet S.
In addition, you may form a notch in a ruled line. If it does in this way, it will become easy to bend the blank sheet S in a ruled line.

  As shown in FIG. 1, the bottom plate 10 is formed in a rectangular shape, and is formed to have a larger left-right direction than a front-rear direction. A front end wall 11 and a rear end wall 12 are connected to the front and rear edges of the bottom plate 10 via ruled lines L1 and L2.

  The front end wall 11 rises upward from the front edge of the bottom plate 10. The front end wall 11 is formed perpendicular to the bottom plate 10. The front end wall 11 is formed in a substantially rectangular shape, and is formed larger in the left-right direction than in the up-down direction.

  As shown in FIG. 1, the rear end wall (one end wall) 12 rises upward from the rear edge of the bottom plate 10. The rear end wall 12 is formed perpendicular to the bottom plate 10. The rear end wall 12 is formed in a rectangular shape corresponding to the front end wall 11, and is formed in the left-right direction larger than the vertical direction.

A top plate 15 is connected to the upper edge portion of the rear end wall 12 via a ruled line L3. The top plate 15 extends forward from the upper edge of the rear end wall 12. The top plate 15 has the same outer shape as the bottom plate 10 and is formed perpendicular to the front end wall 11 and the rear end wall 12.
A joining piece 16 is connected to the front edge portion of the top plate 15 via a ruled line L4. The joining piece 16 extends in a strip shape along the front edge portion of the top plate 15. The joining piece 16 is attached to the upper end portion of the front end wall 11.

  While bending the blank sheet S (see FIG. 2) along the ruled lines L1 to L4, the front end wall 11, the bottom plate 10, the rear end wall 12, The top plate 15 has a rectangular tube shape.

  The left side wall 13 is formed perpendicular to the left edge of the bottom plate 10 and the left edge of the top plate 15. The left side wall 13 includes a front side flap 21, a rear side flap 22, an upper flap 31, and a lower flap 32.

  The front side flap 21 is connected to the left edge of the front end wall 11 via a ruled line L5. The front side flap 21 extends rearward from the left edge of the front end wall 11. The front side flap 21 is formed perpendicular to the front end wall 11.

  The rear side flap 22 is connected to the right edge of the rear end wall 12 via a ruled line L6. The rear side flap 22 extends forward from the right edge of the rear end wall 12. The rear side flap 22 is formed perpendicular to the rear end wall 12.

  The length in the front-rear direction of the front side flap 21 and the rear side flap 22 is half of the length in the front-rear direction of the bottom plate 10 and the top plate 15. The left side surface of the packaging box 1 is closed by the side flaps 21 and 22.

  The upper flap 31 is connected to the left edge portion of the top plate 15 via a ruled line L7. The upper flap 31 extends downward from the left edge of the top plate 15. The upper flap 31 is formed perpendicular to the top plate 15.

The length of the upper flap 31 in the vertical direction is about half of the vertical length of the front and rear end walls 11 and 12.
The inner surface of the upper flap 31 is bonded and joined to the upper part of the outer surface of the front and rear side flaps 21 and 22.

  The lower flap 32 is connected to the left edge of the bottom plate 10 via a ruled line L8. The lower flap 32 extends upward from the left edge of the bottom plate 10. The lower flap 32 is formed perpendicular to the bottom plate 10.

The length of the lower flap 32 in the vertical direction is about half the vertical length of the front and rear end walls 11 and 12.
The inner surface of the lower flap 32 is bonded and joined to the lower part of the outer surface of the pair of front and rear side flaps 21 and 22.

  The right wall 14 is formed perpendicular to the right edge of the bottom plate 10 and the right edge of the top plate 15. The right side wall 14 is symmetrical to the left side wall 13. The right side wall 14 is configured by front side flaps 21, 22, an upper side flap 31 and a lower side flap 32, similarly to the left side wall 13.

  As shown in FIGS. 1 and 2, the bottom plate 10 has perforations for unpacking. The unpacking perforation is composed of two parallel first perforations 17a and 17a formed between the edges of the side walls 13 and 14 (ruled lines L8 and L8, see FIG. 2). The second perforations 18 and 18 intersect (orthogonally) the first perforations 17a and 17a. The first perforations 17a and 17a and the second perforations 18 and 18 function as unpacking guide lines for unpacking (unpacking), for example, a straight line or a bent cut formed intermittently. It is. Each notch penetrates the blank sheet S (see FIG. 2).

  The first perforations 17a and 17a are formed in parallel with the front and rear edges (ruled lines L1 and L2) of the bottom plate 10 at the center in the front and rear direction of the bottom plate 10. A belt-like zipper portion 17 extends between the first perforations 17a and 17a. As shown in FIG. 3B, the zipper portion 17 is separated from the bottom plate 10 in a strip shape, leaving the left end portion, by pulling the right end portion 17b with a finger (not shown) and pulling it up to the left side. The left end portion 17c is connected to a lower flap 32 (see FIG. 2) that forms the left side wall 13 via a ruled line L8. By separating the zipper portion 17, a groove 10 e is formed in the bottom plate 10. The surface of the bottom plate 10 is divided into two in the front-rear direction by the groove 10e.

  The second perforations 18 and 18 are formed along the left and right edges (ruled lines L7 and L7) of the bottom plate 10. The second perforations 18 and 18 intersect (orthogonally) the first perforations 17a and 17a. The second perforations 18, 18 are easily cut off by cutting the zipper portion 17 so that the cuts are in communication with the groove 10 e or close to the groove 10 e.

  When unpacking the packaging box 1 as described above, as shown in FIG. 3A, the packaging box 1 is turned upside down so that the bottom plate 10 is turned up. Then, the right end portion 17b of the zipper portion 17 is pinched with fingers (not shown), and the zipper portion 17 is pulled up to the left side as shown in FIG. 3B. Thereby, the zipper part 17 is cut | disconnected in strip | belt shape leaving the left end part 17c, and the surface of the baseplate 10 is divided into the front and back through the groove | channel 10e.

  Thereafter, fingers are inserted into the groove 10e, and the front and rear bottom plates 10 divided into two are respectively lifted. Then, the left and right second perforations 18 and 18 of the bottom plate 10 are cut open. Thereby, as shown to Fig.4 (a), the baseplate 10 opens back and forth, the packaging box 1 is unpacked, and the cut sheet book C can be taken out.

  Thereafter, when the remaining cut sheet book C is stored in the packaging box 1, or when the cut sheet book C is taken out and reused as the packaging box 1 for storing documents, the opened bottom plate 10 is used as a lid. Use. Specifically, the bottom plate 10 divided into the front and the rear is closed, and the zipper part 17 which has been separated is applied to the groove 10e, and the zipper part 17 is covered with the tape T as shown in FIG. To do. Thereby, the bottom plate 10 is held in a closed state. In addition, what is necessary is just to peel off the tape T and open the baseplate 10 back and forth when opening the baseplate 10 again.

  In the packaging box 1 as described above, the zipper portion 17 (first perforations 17a and 17a) and the second perforations 18 and 18 formed in the surface of the bottom plate 10 can be unpacked. In this case, since the bottom plate 10 is a single plate to which a flap or the like is not attached, the zipper portion 17 can be smoothly separated and the second perforations 18 and 18 can be smoothly opened at the time of unpacking. it can.

  When the unpacked packaging box 1 is reused, each side of the bottom plate 10 divided into two parts is closed, and the closed side is stopped with a tape T. Thereby, the bottom plate 10 is held in a closed state. Therefore, it can be reused as the packaging box 1 with the lid closed. When the tape T is stopped, the bottom plate 10 can be easily closed with one tape T by stopping the tape T along the zipper portion 17.

The zipper portion 17 and the second perforations 18 and 18 are not limited to those provided on the bottom plate 10 and may be provided on the top plate 15. Also in this case, it can be easily unpacked through the zipper part 17 and the second perforations 18, 18 and can be reused as the packaging box 1 with the lid closed by tape-fastening with the tape T. Can do.
Further, the second perforations 18 and 18 may be provided at the edges (ruled lines L8 and L8) of the side walls 13 and 14.

(Second embodiment)
Next, a packaging box according to a second embodiment of the present invention will be described with reference to FIGS. The present embodiment differs from the first embodiment in that perforations 41 and 41 for unpacking are provided on diagonal lines on both surfaces of the bottom plate 10 and the top plate 15 as shown in FIG.

  The perforations 41 and 41 are formed so as to coincide with diagonal lines on both surfaces of the bottom plate 10 and the top plate 15. That is, the perforations 41 and 41 are straight lines. A circular hole 42 for finger hanging is formed at a portion where the perforations 41 at the center of each surface intersect. The perforations 41, 41 are formed across the edges of the side walls 13, 14 (between the ruled lines L8, L8).

  When unpacking the packaging box 1 as described above, as shown in FIG. 7A, the packaging box 1 is turned upside down so that the bottom plate 10 is turned up. Then, fingers (not shown) are inserted into the circular holes 42 in the center of the bottom plate 10, and the perforations 41, 41 are cut open so as to lift the bottom plate 10. Thereby, as shown in FIG.7 (b), the baseplate 10 is divided | segmented into the four surfaces 10a-10d by each perforation 41 and 41, and the packaging box 1 is unpacked. Thereby, the cut sheet book C can be taken out.

  Thereafter, when the remaining cut sheet book C is stored in the packaging box 1, or when the cut sheet book C is taken out and reused as the packaging box 1 for storing documents, the opened bottom plate 10 is used as a lid. Use. Specifically, the bottom plate 10 divided into the front, rear, left and right is closed, and the tape T is stopped on the diagonal line of the bottom plate 10 along the perforations 41 and 41 as shown in FIG. Thereby, the bottom plate 10 is held in a closed state. In addition, what is necessary is just to peel off the tape T and open the baseplate 10 back and forth when opening the baseplate 10 again.

  In the packaging box 1 as described above, when reusing as the packaging box 1 with the lid closed, it is only necessary to stop the tape T along the diagonal line. Further, since the tape T is stopped so as to cross along the diagonal line, the closed bottom plate 10 can be reinforced.

  Further, by similarly opening the perforations 41 and 41 on the top plate 15 side, the top plate 15 is divided into four surfaces 15a to 15d at the perforations 41 and 41 as shown in FIG. Thereby, the packaging box 1 can be folded flat. Therefore, storage is easy.

In this embodiment, the perforations 41 and 41 of the bottom plate 10 are opened by opening the bottom plate 10 at the time of unpacking. On the contrary, the perforations 41 and 41 on the top plate 15 side are opened and opened. May be.
In addition, the round hole 42 may be configured to form a score line and be opened by being hooked with a finger when unpacking.

(Third embodiment)
Next, a packaging box according to a third embodiment of the present invention will be described with reference to FIGS. This embodiment is different from the first and second embodiments in that, in addition to the first perforation 171, a knob 35 for unpacking and a second perforation 36 are provided on both side walls 13 and 14. .

  As shown in FIG. 9, the first perforation 171 is formed at the center in the front-rear direction of the bottom plate 10 across the edge portions (ruled lines L8, L8) of the side walls 13, 14.

  The knob portion 35 is a portion that is pinched with fingers when the packaging box 1 is unpacked, and can be separated from the side walls 13 and 14 (see FIG. 11B). As shown in FIG. 10, the knob portion 35 is formed with respect to the lower flaps 32 and 32, and is exposed at the center portions in the front-rear direction of the lower ends of the side walls 13 and 14 (see FIG. 9).

As shown in FIG. 9, each knob portion 35 is continuous to both ends of the first perforation 171 and is surrounded by a front and rear cut line L35a and an elliptical cut line L35b continuous to the upper end of the front and rear cut line L35a. It consists of a range (see FIG. 10). The lower ends of the front and rear cut lines L35a in each knob portion 35 are connected to ruled lines L8 and L8 that are in contact with both ends of the first perforation 171. The edge 21a of the side flap 21 and the edge 22a of the side flap 22 are located on the front and rear sides of each knob 35. That is, each knob part 35 does not interfere with the front and rear edge parts 21a and 22a.
Each knob portion 35 may be provided so as to be in contact with (interfere with) the front and rear edge portions 21a and 22a.

  As shown in FIGS. 9 and 10, the second perforation 36 is a perforation formed on each of the side walls 13 and 14 on both front and rear sides of each knob portion 35. As shown in FIG. 9, the front second perforation 36 extends in an inclined manner from the upper part of the front cut line L35a of the knob part 35 toward the front end of the ruled line L8. The rear second perforation 36 extends in an inclined manner from the upper part of the rear cut line L35a of the knob portion 35 toward the rear end portion of the ruled line L8.

  When unpacking the packaging box 1 as described above, as shown in FIG. 11 (a), the packaging box 1 is turned upside down so that the bottom plate 10 is turned up. Then, each knob part 35 is pinched with fingers not shown and pulled upward. Thereby, as shown in FIG.11 (b), the knob part 35 is each isolate | separated from the both-side walls 13 and 14 (in the figure, the state which isolate | separated only the side wall 14 side is shown). Thereby, the holes 37 along the cut line of the knob portion 35 are formed in the side walls 13 and 14 respectively.

  Thereafter, fingers are inserted into the holes 37, and the bottom plate 10 is pulled upward. Then, the surface of the bottom plate 10 is divided into two via the first perforation 171 and the second perforation 36 is cut open. Thereby, as shown to Fig.12 (a), the baseplate 10 opens, the packaging box 1 is unpacked, and the cut sheet book C can be taken out.

  Thereafter, when using the opened bottom plate 10 as a lid, the bottom plate 10 divided into two parts is closed, and the separated part is covered with tape T as shown in FIG. . Thereby, the bottom plate 10 is held in a closed state. When the bottom plate 10 is opened again, the bottom plate 10 may be opened by peeling off the tape T.

  In the packaging box 1 as described above, the first perforation 171 and each second perforation 36 formed in the surface of the bottom plate 10 can be opened and opened. In this case, the knob portion 35 that triggers unpacking is formed so as not to interfere with both the front and rear edge portions 21a and 22a, so that it can be smoothly separated and a finger can be easily inserted during unpacking. it can. Therefore, the unpacking operation is easy.

  Moreover, when reusing as the packaging box 1 with the lid closed, each surface of the bottom plate 10 divided into two parts is closed and the closed surface is fastened with the tape T, so that the tape fastening work is easy to perform.

  The first perforations 171 are not limited to those provided on the bottom plate 10 and may be provided on the top plate 15. In this case, by providing the knob portion 35 and the second perforation 36 on the upper flap 31 folded back at the ruled line L7, the same configuration as that provided on the bottom plate 10 can be obtained.

(Fourth embodiment)
Next, a packaging box according to a fourth embodiment of the present invention will be described with reference to FIGS. This embodiment is a modification of the third embodiment. In the present embodiment, the first perforation 171 is formed on the rear end wall 12, and the knob portion 35 and the second perforation 36 are formed on the side flap 22.

  As shown in FIG. 13, the first perforation 171 is formed at the center in the vertical direction of the rear end wall 12 across the edges (ruled lines L6 and L6) of the side walls 13 and 14.

As shown in FIG. 14, the knob portion 35 is formed with respect to the side flaps 22 and 22, and as shown in FIG. 13, the knob portion 35 is exposed at the center in the vertical direction at the rear ends of the side walls 13 and 14. ing.
Each knob portion 35 is continuous with both end portions of the first perforation 171. The rear ends of the front and rear cut lines L35a in the respective knob portions 35 are connected to ruled lines L6 and L6 that are in contact with both ends of the first perforation 171. On the upper and lower sides of the knob portion 35, the edge portion 31a of the upper flap 31 and the edge portion 32a of the lower flap 32 are located. That is, each knob portion 35 is configured not to interfere with the upper and lower edge portions 31a and 32a.
Each knob portion 35 may be provided so as to be in contact with (interfere with) the upper and lower edge portions 31a and 32a.

  As shown in FIGS. 13 and 14, the second perforations 36 are perforations formed on both upper and lower sides of each knob portion 35 in the side walls 13 and 14. As shown in FIG. 13, the upper second perforation 36 extends from the rear end portion (near the rear end portion) of the upper cut line L35a of the knob portion 35 to incline forward toward the upper ruled line L7. doing. The lower second perforation 36 extends from the rear end portion (near the rear end portion) of the lower cut line L35a of the knob portion 35 so as to incline forward toward the lower ruled line L8.

  When unpacking the packaging box 1 as described above, as shown in FIG. Then, each knob part 35 is pinched with fingers not shown and pulled upward. Thereby, as shown in FIG.15 (b), the knob part 35 is each isolate | separated from the both-side walls 13 and 14 (in the figure, the state which isolate | separated only the side wall 13 side is shown). Thereby, the holes 37 along the cut line of the knob portion 35 are formed in the side walls 13 and 14 respectively.

  Thereafter, fingers are inserted into the holes 37, and the rear end wall 12 is pulled upward. Then, the surface of the rear end wall 12 is divided into two via the first perforation 171 and the second perforation 36 is cut and opened. Thereby, as shown in FIG. 16A, the rear end wall 12 is opened, the packaging box 1 is unpacked, and the cut sheet book C can be taken out.

  Thereafter, when the opened rear end wall 12 is used as a lid, the rear end wall 12 divided into two parts is closed, and the separated portion is appropriately covered with a tape T as shown in FIG. And tape it. Thereby, the rear end wall 12 is held in a closed state. When the rear end wall 12 is opened again, the tape T may be peeled off and opened.

  In the packaging box 1 as described above, the first perforation 171 and each second perforation 36 formed in the surface of the rear end wall 12 can be opened and opened. In this case, the knob portion 35 that triggers unpacking is formed so as not to interfere with the edge portion 31a of the upper flap 31 and the edge portion 32a of the lower flap 32, so that it can be separated smoothly and unpacked. Sometimes you can easily insert your finger. Therefore, the unpacking operation is easy.

  Moreover, when reusing as the packaging box 1 with the lid closed, it is only necessary to close each surface of the rear end wall 12 divided into two and stop the closed surface with the tape T, so that the tape fixing operation is easy. .

  The first perforation 171 is not limited to the one provided on the rear end wall 12 and may be provided on the front end wall 11. In this case, by providing the knob portion 35 and the second perforation 36 on the side flap 21 which is folded back along the ruled line L5, the same configuration as that provided on the rear end wall 12 can be obtained.

The embodiment of the present invention has been described above, but the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.
In 1st embodiment, although the zipper part 17 was provided in the baseplate 10, it is not restricted to this, You may form by one perforation. The second perforations 18 and 18 may be zippers.

  Further, in the third and fourth embodiments, the first perforation 171 is formed as a belt-like zipper portion that is continuous with each knob portion 35, and the zipper portion is cut into a belt-like shape together with the knob portion 35 except for one end. May be.

  Although the packaging box 1 of this embodiment is made of cardboard, the packaging box may be formed of various known paperboards.

DESCRIPTION OF SYMBOLS 1 Packaging box 10 Bottom plate 11 Front end wall 12 Rear end wall 13 Left side wall 14 Right side wall 15 Top plate 17 Zipper part 17a First perforation 18 Second perforation 21 Side flap 22 Side flap 31 Upper flap 32 Lower flap 41 Sewing machine Eye S Blank sheet T Tape

Claims (6)

A wrap-around packaging box,
The bottom plate,
A pair of front and rear end walls connected to the front and rear edges of the bottom plate;
A top plate connected to the upper edge of one of the end walls;
A pair of left and right side walls,
The side wall
Front and rear side flaps respectively connected to the both end walls;
A lower flap connected to the bottom plate;
An upper flap connected to the top plate,
The upper flap and the lower flap are attached to the outer surfaces of the front and rear side flaps,
An unpacking perforation is formed between edges of the side walls in at least one surface of the bottom plate and the top plate. The unpacking perforation is a first perforation that extends linearly between edges of the both side walls and divides the surface into two.
The packaging box according to claim 1, wherein the first perforation intersects with a pair of second perforations formed along edges of the side walls. Two parallel first perforations,
The packaging box according to claim 2, wherein a zipper part extends between the first perforations.   The packaging box according to claim 1, wherein the unpacking perforation extends diagonally. The unpacking perforation is a first perforation that extends linearly at least between edges of the both side walls and divides the surface into two.
The both side walls are each formed with a knob portion that is continuous with the first perforation,
The packaging box according to claim 1, wherein a pair of second perforations formed on the both side walls intersect each of the knob portions. A blank sheet of a wrap-around packaging box comprising a bottom plate, a top plate, a pair of end walls, and a pair of side walls,
A blank sheet for a packaging box, wherein a perforation for unpacking is formed between edges of the both side walls in at least one surface of the bottom plate and the top plate.

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