JP7115527B2 - packaging box - Google Patents

Description

The present invention relates to packaging boxes .

2. Description of the Related Art Conventionally, corrugated cardboard packaging boxes in which a plurality of products such as cut sheet books are packed have been widely distributed. A wrap-around type packaging box is often used as a packaging box for such cut sheet volumes.
A wrap-around type packaging box consists of a corrugated cardboard sheet in which a top plate, a bottom plate, and a pair of end walls are connected via a ruled line for folding. At the time of packaging, the sheet is folded so as to involve a plurality of stacked cut sheets, and the end wall and the top plate are glued and joined to form a peripheral wall. The inner flaps extending from both end walls are folded, and the outer flaps extending from the top and bottom plates are folded over the inner flaps and glued to seal both side surfaces of the peripheral wall (see Patent Document 1, for example).

A wrap-around packaging box can be opened, for example, by peeling off the glued outer flaps or joint pieces.

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 on the upper and lower sides of a rectangular parallelepiped box. The A-type box is packed by tape-fastening the butt portions of the outer flaps. The A-type box can be easily opened by tearing off the tape.

JP 2012-246025 A

In the packaging box disclosed in Patent Document 1, once the outer flaps and joint pieces are peeled off and the box is unpacked, the sides and top plate are not kept closed and remain open. Therefore, there is a problem that it is difficult to reuse the packaging box with the lid closed.

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

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems and to provide a wrap-around packaging box that can be easily reused as a packaging box with a closed lid.

In order to solve the above-mentioned problems, the packaging box of the present invention is a wrap-around type packaging box comprising a bottom plate, a pair of front and rear end walls connected to the front and rear edges of the bottom plate, and one end wall. It has a top plate connected to the upper edge of the wall and a pair of left and right side walls. The side walls include front and rear side flaps connected to the end walls, lower flaps connected to the left and right edges of the bottom plate via ruled lines, and ruled lines to the left and right edges of the top plate. and an upper flap that is connected via . The upper flap and the lower flap are attached to the outer surfaces of the front and rear side flaps. In at least one of the bottom plate and the top plate, perforations for unpacking are formed between the ruled lines on the left and right edges of the both side walls. The unpacking perforation is a first perforation that linearly extends between the ruled lines on both side walls and divides the plane into two. Knobs are formed on both side walls at both ends of the first perforation and continue through the ruled lines of the both side walls. Each of the knob portions has a pair of cut lines separated in the front and rear of both ends of the first perforation and connected to the ruled lines of the both side walls. A pair of second perforations formed in the planes of the both side walls intersect with each of the knob portions . The pair of second perforations extend obliquely along the ruled lines of the both side walls and intersect the pair of cut lines .

In the packaging box of the present invention, the knob part is pinched and separated, and the opening surface is divided into two along the first perforation with the hole formed thereby as a starting point, and the second perforation on both side walls is cut open. can be unpacked. In this case, since flaps are not attached to the bottom plate and the top plate, the perforations can be cut open smoothly. After that, when the unpacked packaging box is to be reused, the bisected surface is closed, the open surface is closed by perforations, and the closed surface is taped. As a result, the surface on which the opening is open is held in a closed state. Therefore, it can be reused as a packaging box with a closed lid. In this case, the halves and the side walls should be closed together with one piece of tape.

Further, the packaging box of the present invention is a wrap-around packaging box comprising a bottom plate, a pair of front and rear end walls connected to the front and rear edges of the bottom plate, and an upper edge of one of the end walls. and a pair of left and right side walls. The side walls include front and rear side flaps connected to left and right edges of the end walls via ruled lines, respectively, lower flaps connected to the bottom plate, and upper flaps connected to the top plate. and have. The upper flap and the lower flap are attached to the outer surfaces of the front and rear side flaps. In at least one of the front end wall and the rear end wall, perforations for unpacking are formed between the ruled lines on the left and right edges of the both side walls. The unpacking perforation is a first perforation that linearly extends between the edges of the side walls and divides the plane into two. Knobs are formed on both side walls at both ends of the first perforation and continue through the ruled lines of the both side walls. Each of the knob portions has a pair of cut lines separated vertically from both ends of the first perforation and connected to the ruled lines of the side walls. A pair of second perforations formed in the planes of the both side walls intersect with each of the knob portions . The pair of second perforations extend obliquely along the ruled lines of the both side walls and intersect the pair of cut lines .

In the packaging box of the present invention, the knob part is pinched and separated, the opening formed by this is used as a starting point to divide the opening surface along the first perforation into two, and the second perforation on both side walls is cut open. can be unpacked. In this case, since flaps are not attached to both end walls, the perforations can be cut open smoothly. After that, when the unpacked packaging box is to be reused, the bisected surface is closed, the open surface is closed by perforations, and the closed surface is taped. As a result, the surface on which the opening is open is held in a closed state. Therefore, it can be reused as a packaging box with a closed lid. In this case, the halves and the side walls should be closed together with one piece of tape.

The present invention provides a wrap-around packaging box that can be reused as a closed lid packaging box.

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 the packaging box according to the first embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS 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 a perspective view which shows the state which cut open the strip|belt-shaped zipper part. It is a diagram. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a packaging box according to a first embodiment of the present invention, (a) is a perspective view showing a state in which a bottom plate divided by a zipper part is opened and unpacked, and (b) is a bottom plate when reused. FIG. 10 is a perspective view showing the closed and taped condition; 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 the packaging box according to the second embodiment of the present invention. It is a diagram showing a packaging box according to a second embodiment of the present invention, (a) is a perspective view showing a state in which it is turned upside down when unpacking, and (b) is a state in which the bottom plate is opened by cutting the perforations. It is a perspective view showing. FIG. 3 is a diagram showing a packaging box according to a second embodiment of the present invention, (a) is a perspective view showing a state where the bottom plate is closed and taped when reused, and (b) is a perforation cut open on the bottom plate and the top plate. FIG. 10 is a diagram showing a flat folded state. It is the perspective view which looked at the packaging box which concerns on 3rd embodiment of this invention from the front upper left. It is a blank sheet of the packaging box according to the third embodiment of the present invention. It is a figure showing a packaging box according to a third embodiment of the present invention, (a) is a perspective view showing a state in which it is turned upside down when unpacking, and (b) is a perspective view showing a state in which one knob is separated. It is a diagram. It is a diagram showing a packaging box according to a third embodiment of the present invention, (a) shows a bottom plate divided by the first perforation and the second perforation, and a state in which the portion connected to the bottom plate is opened and unpacked. (b) is a perspective view showing a state in which the bottom plate is closed and taped for reuse. 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 the packaging box according to the fourth embodiment of the present invention. It is a figure showing a packaging box according to a fourth embodiment of the present invention, (a) is a perspective view showing a state in which the rear end wall is up at the time of unpacking, (b) is a state in which one knob is cut away It is a perspective view showing It is a diagram showing a packaging box according to a fourth embodiment of the present invention, (a) is the rear end wall divided by the first perforation and the second perforation and the portion continuous to this is opened and unpacked FIG. 3B is a perspective view showing a state, and (b) is a perspective view showing a state in which the bottom plate is closed and taped for reuse.

Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In the following description, the front, back, left, right, up and 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 wraparound rectangular parallelepiped box. 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 packaging a product such as a cut sheet volume C (see FIG. 4(a)) (not shown), the packaging box 1 is turned upside down as shown in FIG. can be transported with the top plate 15 facing up and the top plate 15 facing down.

As shown in FIG. 2, the packaging box 1 is formed by mountain-folding and valley-folding a blank sheet S obtained by cutting out one cardboard sheet. The blank sheet S shown in FIG. 2 is arranged so that the inner side can be seen.
Each ruled line (folding line) of the blank sheet S is a linear groove formed by pressing the surface of the blank sheet S. As shown in FIG.
Note that notches may be formed in the ruled lines. By doing so, it becomes easier to fold the blank sheet S at the ruled line.

As shown in FIG. 1, the bottom plate 10 is formed in a rectangular shape, and is larger in the left-right direction than in the 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 larger in the horizontal direction than in the vertical direction.

The rear end wall (one end wall) 12 rises upward from the rear edge of the bottom plate 10, as shown in FIG. 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 larger in the horizontal direction than in the vertical direction.

A top plate 15 is connected to the upper edge 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 joint piece 16 is connected to the front edge of the top plate 15 via a ruled line L4. The joint piece 16 extends along the front edge of the top plate 15 in a strip shape. A joint piece 16 is attached to the upper end of the front end wall 11 .

While folding the blank sheet S (see FIG. 2) along the ruled lines L1 to L4, the joining piece 16 is adhered to the upper front surface of the front end wall 11 to join the front end wall 11, the bottom plate 10, the rear end wall 12, The top plate 15 comes to exhibit square tube shape.

Left side wall 13 is formed perpendicular to the left edge of bottom plate 10 and the left edge of top plate 15 . The left side wall 13 is composed of 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 flaps 21 are 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. A rear side flap 22 extends forward from the right edge of the rear end wall 12 . The rear side flaps 22 are formed perpendicular to the rear end wall 12 .

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

The upper flap 31 is connected to the left edge 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 vertical length of the upper flap 31 is approximately half the vertical length of the front and rear end walls 11 and 12 .
The inner surface of the upper flap 31 is adhered and joined to the upper portions of the outer surfaces 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 vertical length of the lower flap 32 is approximately half the vertical length of the front and rear end walls 11 and 12 .
The inner surface of the lower flap 32 is adhered and joined to the lower portions of the outer surfaces of the pair of front and rear side flaps 21 and 22 .

The right side 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 bilaterally symmetrical with the left side wall 13 . The right side wall 14 , like the left side wall 13 , is composed of front side flaps 21 and 22 , an upper flap 31 and a lower flap 32 .

As shown in FIGS. 1 and 2, the bottom plate 10 is formed with perforations for unpacking. The unpacking perforations consist of two parallel first perforations 17a, 17a formed between the edges of the side walls 13, 14 (ruled lines L8, L8, see FIG. 2). The second perforations 18, 18 cross (perpendicularly) the first perforations 17a, 17a. The first perforations 17a, 17a and the second perforations 18, 18 respectively function as unpacking guide lines for unpacking (opening), and for example, straight or curved cuts are intermittently formed. is. Each notch penetrates the blank sheet S (see FIG. 2).

The first perforations 17a, 17a are formed parallel to the front and rear edges (ruled lines L1, L2) of the bottom plate 10 at the central portion of the bottom plate 10 in the front-rear direction. A strip-shaped zipper portion 17 extends between the first perforations 17a, 17a. As shown in FIG. 3(b), the zipper part 17 is cut off from the bottom plate 10 in a belt shape, leaving the left end part, by picking up the right end part 17b with fingers (not shown) and pulling it to the left. The left end portion 17c is connected to a lower flap 32 (see FIG. 2) forming the left side wall 13 via a ruled line L8. A groove 10 e is formed in the bottom plate 10 by cutting off the zipper portion 17 . The surface of the bottom plate 10 is divided into two parts in the front-rear direction by the groove 10e.

The second perforations 18 , 18 are formed along the left and right edges (ruled lines L<b>7 , L<b>7 ) of the bottom plate 10 . The second perforations 18, 18 cross (perpendicularly) the first perforations 17a, 17a. By separating the zipper part 17, the second perforations 18, 18 are in a state in which the notches are in communication with the groove 10e or in a state close to the groove 10e, so that they are easily cut open.

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 faces upward. Then, the right end 17b of the zipper portion 17 is pinched with fingers (not shown), and as shown in FIG. 3B, the zipper portion 17 is pulled upward while being pulled to the left. As a result, the zipper portion 17 is cut off in a belt shape leaving the left end portion 17c, and the surface of the bottom plate 10 is divided into front and rear halves via the groove 10e.

After that, fingers are inserted into the grooves 10e, and the front and rear bottom plates 10 divided into two parts are respectively lifted. Then, the left and right second perforations 18, 18 of the bottom plate 10 are cut open. As a result, as shown in FIG. 4A, the bottom plate 10 is opened forward and backward, the packaging box 1 is unpacked, and the cut sheet volume C can be taken out.

After that, when the remaining cut sheet volume C is stored in the packaging box 1, or when the cut sheet volume C is taken out and reused as the packaging box 1 for storing documents, etc., the opened bottom plate 10 is used as a lid. use. Specifically, the bottom plate 10 divided into two front and rear portions is closed, and the separated zipper portion 17 is applied to the groove 10e, and as shown in FIG. do. Thereby, the bottom plate 10 is held in a closed state. In order to open the bottom plate 10 again, the tape T can be peeled off and the bottom plate 10 can be opened back and forth.

The packaging box 1 as described above can be unpacked by cutting open the zipper portion 17 (first perforations 17a, 17a) and the second perforations 18, 18 formed in the plane of the bottom plate 10 . In this case, since the bottom plate 10 is a single plate to which no flap or the like is attached, the zipper portion 17 can be smoothly cut off and the second perforations 18, 18 can be smoothly cut open when unpacking. can.

When reusing the unpacked packaging box 1, each side of the bottom plate 10 divided into two is closed and the closed side is taped. 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. In addition, when fixing the tape T, the bottom plate 10 can be easily closed with one tape T by fixing the tape T along the zipper portion 17 .

In addition, the zipper portion 17 and the second perforations 18 , 18 are not limited to those provided on the bottom plate 10 , and may be provided on the top plate 15 . Even in this case, the packaging box 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 taping with the tape T. can be done.
Also, the second perforations 18, 18 may be provided at the edges of the side walls 13, 14 (ruled lines L8, L8).

(Second embodiment)
Next, a packaging box according to a second embodiment of the present invention will be described with reference to FIGS. 5 to 8. FIG. This embodiment differs from the first embodiment in that, as shown in FIG. 5, perforations 41 for unpacking are provided on the diagonal lines on both sides of the bottom plate 10 and the top plate 15, respectively.

The perforations 41 , 41 are formed so as to match diagonal lines on both sides of the bottom plate 10 and the top plate 15 . That is, the perforations 41, 41 are straight lines. A circular hole 42 for hooking a finger is formed in the portion where the perforations 41, 41 at the center of each surface intersect. The perforations 41, 41 are formed between 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 faces upward. Then, a finger (not shown) is inserted into the circular hole 42 in the central portion of the bottom plate 10 and the bottom plate 10 is lifted to cut open the perforations 41 , 41 . As a result, as shown in FIG. 7(b), the bottom plate 10 is divided into four surfaces 10a to 10d by the perforations 41, 41, and the packaging box 1 is unpacked. As a result, the cut sheet booklet C can be taken out.

After that, when the remaining cut sheet volume C is stored in the packaging box 1, or when the cut sheet volume C is taken out and reused as the packaging box 1 for storing documents, etc., the opened bottom plate 10 is used as a lid. use. Specifically, the bottom plate 10, which is divided into front, back, left, and right, is closed, and tape T is fastened on the diagonal line of the bottom plate 10 along the perforations 41, 41, as shown in FIG. 8(a). Thereby, the bottom plate 10 is held in a closed state. In order to open the bottom plate 10 again, the tape T can be peeled off and the bottom plate 10 can be opened back and forth.

When the packaging box 1 as described above is reused as the packaging box 1 with the lid closed, the tape T can be fastened along the diagonal line, which facilitates the taping operation. Moreover, since the tapes T are stopped so as to intersect along the diagonal line, the closed bottom plate 10 can be reinforced.

Similarly, by cutting open the perforations 41, 41 on the top plate 15 side, the top plate 15 is divided into four surfaces 15a to 15d by the perforations 41, 41, as shown in FIG. 8(b). Thereby, the packaging box 1 can be folded flat. Therefore, storage is easy.

In the present embodiment, the bottom plate 10 is opened by cutting the perforations 41, 41 of the bottom plate 10 at the time of unpacking. may
Also, the circular hole 42 may be formed with a cut line so that it can be opened by hooking it 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. 9 to 12. FIG. This embodiment differs from the first and second embodiments in that, in addition to the first perforation 171, the side walls 13 and 14 are provided with a knob 35 for unpacking and a second perforation 36. .

As shown in FIG. 9, the first perforation 171 is formed in the front-rear direction central portion of the bottom plate 10 between the edges (ruled lines L8, L8) of the side walls 13, 14. As shown in FIG.

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

As shown in FIG. 9, each knob portion 35 is continuous with both ends of the first perforation 171, and is surrounded by a front/rear cut line L35a and an elliptical cut line L35b that is continuous with the upper end of the front/rear cut line L35a. range (see FIG. 10). The lower ends of the front and rear cut lines L35a of the respective knob portions 35 are connected to ruled lines L8, L8 with which both ends of the first perforations 171 are in contact. An edge portion 21 a of the side flap 21 and an edge portion 22 a of the side flap 22 are positioned on the front and rear sides of each knob portion 35 . In other words, each knob portion 35 does not interfere with both the front and rear edge portions 21a and 22a.
Note that each knob portion 35 may be provided so as to contact (interfere with) both the front and rear edge portions 21a and 22a.

As shown in FIGS. 9 and 10, the second perforations 36 are perforations formed on both front and rear sides of each knob portion 35 on both side walls 13 and 14, respectively. As shown in FIG. 9, the second perforation 36 on the front side extends obliquely from above the front cut line L35a of the knob portion 35 toward the front end of the ruled line L8. The second perforation 36 on the rear side extends obliquely from the upper portion 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 faces upward. Then, each knob portion 35 is picked up by fingers (not shown) and pulled upward. As a result, as shown in FIG. 11(b), the knob portion 35 is separated from both side walls 13 and 14 (the figure shows a state in which only the side wall 14 side is separated). As a result, holes 37 along the cut line of the knob portion 35 are formed in the side walls 13 and 14, respectively.

After that, insert fingers into the holes 37 and pull the bottom plate 10 upward. Then, the surface of the bottom plate 10 is divided into two via the first perforation 171, and the second perforations 36 are cut open. As a result, as shown in FIG. 12(a), the bottom plate 10 is opened, the packaging box 1 is unpacked, and the cut sheet volume C can be taken out.

After that, when the opened bottom plate 10 is used as a lid, the bottom plate 10 divided into two parts is closed, and as shown in FIG. . Thereby, the bottom plate 10 is held in a closed state. When opening the bottom plate 10 again, the tape T should be peeled off to open the bottom plate 10 .

The packaging box 1 as described above can be unpacked by cutting open the first perforations 171 and the second perforations 36 formed in the plane of the bottom plate 10 . In this case, the knob portion 35, which serves as a trigger for unpacking, is formed so as not to interfere with both the front and rear edges 21a and 22a, so that it can be separated smoothly and a finger can be easily inserted at the time of unpacking. can. Therefore, the unpacking operation is easy.

When reusing the packaging box 1 with the lid closed, each surface of the bottom plate 10 divided into two is closed and the closed surfaces are taped, which facilitates the taping operation.

In addition, the first perforation 171 is not limited to being provided on the bottom plate 10 , and may be provided on the top plate 15 . In this case, by providing the upper flap 31 folded back along the ruled line L7 with the knob portion 35 and the second perforations 36, the same configuration as when provided on the bottom plate 10 can be achieved.

(Fourth embodiment)
Next, a packaging box according to a fourth embodiment of the present invention will be described with reference to FIGS. 13 to 16. FIG. This embodiment is a modification of the third embodiment. This embodiment is different in that the first perforations 171 are formed in the rear end wall 12 and the knob portion 35 and the second perforations 36 are formed in the side flaps 22 .

As shown in FIG. 13, the first perforation 171 is formed in the vertical central portion of the rear end wall 12 between the edges (ruled lines L6, L6) of the side walls 13,14.

The knob portions 35 are formed on the side flaps 22, 22, as shown in FIG. 14, and are exposed at the vertical central portions of the rear ends of the side walls 13, 14, respectively, as shown in FIG. ing.
Each knob portion 35 is continuous with both ends of the first perforation 171 . The rear ends of the front and rear cut lines L35a in each knob portion 35 are connected to ruled lines L6, L6 with which both ends of the first perforation 171 are in contact. An edge portion 31 a of the upper flap 31 and an edge portion 32 a of the lower flap 32 are positioned on the upper and lower sides of the knob portion 35 . In other words, each knob portion 35 does not interfere with both the upper and lower edge portions 31a and 32a.
Note that each knob portion 35 may be provided so as to contact (interfere with) both 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 the upper and lower sides of each knob portion 35 on the side walls 13 and 14, respectively. As shown in FIG. 13, the second perforation 36 on the upper side extends from the rear end (near the rear end) of the upper cut line L35a of the knob portion 35 in a state of being inclined forward toward the upper ruled line L7. is doing. The second perforation 36 on the lower side 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 be inclined forward toward the lower ruled line L8.

When unpacking the packaging box 1 as described above, as shown in FIG. 15(a), the rear end wall 12 is placed upward. Then, each knob portion 35 is picked up by fingers (not shown) and pulled upward. As a result, as shown in FIG. 15B, the knob portion 35 is separated from both side walls 13 and 14 (the figure shows a state in which only the side wall 13 side is separated). As a result, holes 37 along the cut line of the knob portion 35 are formed in the side walls 13 and 14, respectively.

After that, insert a finger into each hole 37 and pull the rear end wall 12 upward. As a result, the surface of the rear end wall 12 is divided into two through the first perforation 171, and the second perforations 36 are cut open. As a result, as shown in FIG. 16(a), the rear end wall 12 is opened, the packaging box 1 is unpacked, and the cut sheet volume C can be taken out.

After that, when the opened rear end wall 12 is used as a lid, the divided rear end wall 12 is closed, and as shown in FIG. and tape it down. This keeps the rear end wall 12 closed. To open the rear end wall 12 again, the tape T should be peeled off.

The packaging box 1 as described above can be unpacked by cutting open the first perforations 171 and the second perforations 36 formed in the plane of the rear end wall 12 . In this case, since the knob portion 35 that serves as a trigger for 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, it is possible to smoothly separate and unpack. You can easily stick your finger in it. Therefore, the unpacking operation is easy.

In addition, when the packaging box 1 with the lid closed is reused, each surface of the rear end wall 12 divided into two can be closed, and the closed surface can be fixed with the tape T, which facilitates the taping operation. .

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

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and can be appropriately modified without departing from the scope of the invention.
Although the bottom plate 10 is provided with the zipper portion 17 in the first embodiment, the zipper portion 17 is not limited to this, and may be formed by a single perforation. Also, the second perforations 18, 18 may be used as a zipper.

Further, in the third and fourth embodiments, the first perforation 171 is formed as a band-shaped zipper portion that is continuous with each knob portion 35, and the zipper portion is separated into a band shape together with the knob portion 35, leaving one end. You may

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

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 (2)

A wrap-around packaging box,
a bottom plate;
a pair of front and rear end walls connected to 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 walls are
front and rear side flaps respectively connected to the end walls;
a lower flap connected to the left and right edges of the bottom plate via a ruled line;
and an upper flap connected to the left and right edges of the top plate via a ruled line,
The upper flap and the lower flap are attached to the outer surfaces of the front and rear side flaps,
In at least one surface of the bottom plate and the top plate, perforations for unpacking are formed between the ruled lines on the left and right edges of the both side walls,
The unpacking perforation is a first perforation that extends linearly between the ruled lines on the both side walls and divides the plane into two,
Knob portions are formed on both side walls at both ends of the first perforation and are continuous via the ruled lines of the both side walls,
each of the knob portions has a pair of cut lines spaced forward and backward from both ends of the first perforation and connected to the ruled lines of the both side walls;
A pair of second perforations formed in the planes of the both side walls intersect each of the knob portions ,
A packaging box, wherein the pair of second perforations extends obliquely along the ruled lines of the both side walls and intersects the pair of cut lines . A wrap-around packaging box,
a bottom plate;
a pair of front and rear end walls connected to 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 walls are
Front and rear side flaps connected to the left and right edges of the end walls via ruled lines, respectively;
a lower flap connected to the bottom plate;
and 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,
In at least one of the front end wall and the rear end wall, perforations for unpacking are formed between the ruled lines on the left and right edges of the both side walls,
The unpacking perforation is a first perforation that extends linearly between the edges of the side walls and divides the plane into two,
Knob portions are formed on both side walls at both ends of the first perforation and are continuous via the ruled lines of the both side walls,
each of the knob portions has a pair of cut lines separated vertically from both ends of the first perforation and connected to the ruled lines of the both side walls;
A pair of second perforations formed in the planes of the both side walls intersect each of the knob portions ,
A packaging box, wherein the pair of second perforations extends obliquely along the ruled lines of the both side walls and intersects the pair of cut lines .

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