JP7192517B2 - packaging box - Google Patents

Description

The present invention relates to packaging boxes.

As a corrugated cardboard packaging box, an opening start portion is formed in the center of the top plate, and cutting guide lines extend from the opening start portion to the front and rear edges, and the cut guide lines divide the wall into upper and lower parts. are formed (see, for example, Patent Document 1).

When opening the packaging box described above, first, a fingertip is put on the unsealing start portion and the top plate is pulled up to cut open the cutting guide line of the top plate. Furthermore, the wall portion is divided into upper and lower parts by cutting open the wall portion following the cutting guide line of the top plate. When the packaging box is opened in this way, the lower part of the packaging box becomes a tray, so that the contents can be displayed in the store while being accommodated in the tray.

JP 2018-177373 A

In the above-described conventional packaging box, when the top plate is pulled up by putting a fingertip on the unsealing start portion, the top plate is difficult to deform upward, so there is a problem that it is difficult to cut open the cutting guide line of the top plate.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems and to provide a packaging box that can be opened by easily cutting open the cutting guide line of the top plate.

In order to solve the above-mentioned problems, the present invention provides a packaging box, which includes a cylindrical wall portion having a pair of front and rear end walls and a pair of left and right side walls, and a bottom plate connected to a lower edge portion of the wall portion. and a top plate connected to the upper edge of the wall portion, and an unsealing start portion is formed in the central portion of the top plate. The top plate is formed with a top cutting guide line extending toward one diagonal corner from the opening start portion and a top ruled line extending from the opening start portion toward the other diagonal corner. . The wall portion is provided with a transverse cutting guide line that vertically partitions the wall portion, and a longitudinal cutting guide line that continues from the end of the top cutting guide line to the transverse cutting guide line. ing. The vertical cutting guide line is formed on a ruled line between the end wall and the side wall. The end wall includes a pair of upper and lower outer flaps connected to the top plate and the bottom plate, respectively, and a pair of left and right inner flaps connected to the left and right side walls, respectively. The upper and lower outer flaps are superimposed on the outer surfaces of the left and right inner flaps. A downward recess is formed at the end of the upper edge of the inner flap, and the top cutting guide line and the vertical cutting guide line are continuous through the recess. .

In the packaging box of the present invention, when the top plate is lifted by putting a fingertip on the unsealing start portion, the top plate is bent upward along the top ruled line. As a result, the top plate can be largely drawn upward with a small force, so that the top cutting guide line can be easily cut open.

In the packaging box described above, the wall portion has a pair of front and rear end walls and a pair of left and right side walls, and the vertical cutting guide line is formed on a ruled line between the end walls and the side walls. It is
In this way, even if the vertical cutting guide line is formed on the wall, it is possible to prevent the strength of the wall from being lowered.

In the packaging box described above, a recess is formed in the upper edge of the wall, and the top cutting guide line and the vertical cutting guide line are connected through the recess.
With this configuration, cutting the top cut guide wire to the end will reach the recess. Since the vertical cutting guide line is continuous with the recessed portion, the vertical cutting guide line can be smoothly cut open following the top cutting guide line.

According to the packaging box of the present invention, the top plate can be pulled upward to a large extent to cut open the top cutting guide line, so that the box can be easily unsealed to form a tray.

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 the figure which showed the blank sheet of the packaging box which concerns on 1st embodiment of this invention. FIG. 4 is a perspective view showing a state in which the top cutting guide line is cut open in the packaging box according to the first embodiment of the present invention. 1 is a perspective view showing a state in which a wall portion is divided into upper and lower parts in the packaging box according to the first embodiment of the present invention; FIG. It is the perspective view which looked at the packaging box which concerns on 2nd embodiment of this invention from the front upper left.

Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In addition, in description of each embodiment, the same code|symbol shall be attached|subjected regarding the same component, and the overlapping description shall be abbreviate|omitted.
In the following description, the front, rear, left, and right directions are set for convenience in describing the packaging box of each embodiment, and do not limit the configuration of the packaging box.

[First embodiment]
The packaging box 1 of the first embodiment includes, as shown in FIG. This is a wrap-around type corrugated cardboard box provided with a connected top plate 20. - 特許庁
The wall portion 10 is formed in the shape of a quadrangular square tube in plan view, and includes a pair of front and rear end walls 11 and a rear end wall 12 and a pair of left and right walls 13 and 14 . A lower opening of the wall 10 is closed by a bottom plate 30 , and an upper opening of the wall 10 is closed by a top plate 20 .
Although the contents accommodated in the packaging box 1 of the first embodiment are not limited, for example, a plurality of PET bottles can be accommodated as the contents.

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

The bottom plate 30 is a rectangular flat plate, as shown in FIG. A lower edge portion of the wall portion 10 is connected to the outer peripheral edge portion of the bottom plate 30 .
A left side wall 13 is connected to the left edge of the bottom plate 30 via a ruled line, and a right side wall 14 is connected to the right edge of the bottom plate 30 via a ruled line.
The left side wall 13 and the right side wall 14 are the same rectangular wall body and are formed perpendicular to the bottom plate 30 .

A top plate 20 is connected to the upper edge of the right side wall 14 via a ruled line. The top plate 20 is the same rectangular flat plate as the bottom plate 30 and is formed perpendicular to the right side wall 14 .
A connecting piece 15 is connected to the upper edge of the left side wall 13 via a ruled line. The joint piece 15 is a strip-shaped portion formed along the upper edge of the left side wall 13 .
While bending the blank sheet S (see FIG. 2) along the respective ruled lines, the joining piece 15 continuously provided on the upper edge of the left side wall 13 is joined to the inner surface of the top plate 20 to form the left side wall 13, the bottom plate 30, and the right side wall. 14 and the top plate 20 are formed in a square tube shape.

The front end wall 11 includes a pair of upper and lower outer flaps 16a, 16a connected to the front edges of the top plate 20 and the bottom plate 30, respectively, and a pair of left and right flaps connected to the front edges of the left side wall 13 and the right side wall 14, respectively. Inner flaps 16b, 16b are provided.
The upper and lower outer flaps 16a, 16a are overlapped and adhered to the outer surfaces of the left and right inner flaps 16b, 16b.
The upper and lower outer flaps 16a, 16a are arranged with a gap in the vertical direction, and the left and right inner flaps 16b, 16b are arranged with a gap in the left and right direction. As a result, a square opening is formed in the central portion of the front end wall 11 .
Further, a handle hole 16c is formed in the upper outer flap 16a. The handle hole 16c is a part where a finger is put when lifting the packaging box 1. - 特許庁
In the state of the blank sheet S (see FIG. 2), the handle hole 16c is closed, and the periphery of the handle hole 16c is ruled and cut so that the handle hole 16c can be formed when the packaging box 1 is used. Consists of any combination of lines, half-cut lines, etc.

The rear end wall 12 has the same configuration as the front end wall 11, and is composed of a pair of upper and lower outer flaps 16a, 16a and a pair of left and right inner flaps 16b, 16b. The rear end wall 12 is also formed with an opening and a handle hole 16c.

In the packaging box 1 of the first embodiment, an opening start portion 50 is formed in the central portion of the top plate 20 . The unsealing start portion 50 is an opening formed at the center of one diagonal line connecting the left front corner 21 and the right rear corner 24 of the top plate 20 . The opening start part 50 is formed in a substantially rectangular shape along one diagonal line.

In the state of the blank sheet S (see FIG. 2), the opening start portion 50 is closed by the cover plate 51 . Intermittent cut lines are formed by cutting the liner and flutes (core) at the front and rear edges of the cover plate 51 , and ruled lines are formed at the left and right edges of the cover plate 51 . Also, a half-cut line is formed on one diagonal line in the cover plate 51 .
When the packaging box 1 is assembled, the opening start part 50 is closed by the cover plate 51, and when the packaging box 1 is opened, the cover plate 51 in the opening start part 50 is pushed inward to open the opening start part 50. open up.

In the first embodiment, the position of the opening start portion 50 is set so that the lid plate 51 does not hit the contents when the lid plate 51 in the opening start portion 50 is pushed inward. For example, when the contents are a plurality of PET bottles, the opening start part 50 is arranged between the caps of the PET bottles arranged side by side.

The top plate 20 has a top cutting guide line 60 extending from the opening start portion 50 toward one of two pairs of diagonal corners of the top plate 20 (left front corner 21 and right rear corner 24). is formed. The top cutting guide line 60 is a perforated line in which Y-shaped cuts are intermittently formed.
The top cutting guide line 60 is formed on one of the two sets of diagonal lines of the top plate 20 (diagonal connecting the left front corner 21 and the right rear corner 24 of the top plate 20).

A first transverse cutting guide line 71 is formed on the left and right inner flaps 16b, 16b of the front end wall 11 (see FIG. 2). The first transverse cutting guide line 71 is a perforated line in which linear cuts are intermittently formed.
The first cross-cutting guide line 71 extends in the left-right direction, and vertically divides the inner flap 16b. The first transverse cutting guide line 71 is formed at a position overlapping the upper edge of the lower outer flap 16a.

Similarly to the front end wall 11, the left and right inner flaps 16b, 16b of the rear end wall 12 are also formed with first transverse cutting guide lines 71. As shown in FIG.

A second transverse cutting guide line 72 is formed on the left side wall 13 . The second transverse cutting guide line 72 is a perforated line in which linear cuts are intermittently formed.
The second transverse cutting guide line 72 extends in the front-rear direction and divides the left side wall 13 vertically. The second transverse cutting guide line 72 of the first embodiment is a wavy line that is repeatedly curved vertically.
The front and rear end portions of the second transverse-cutting guide wire 72 are respectively continuous with the front and rear first transverse-cutting guide wires 71, 71 (see FIG. 2).

Further, the right side wall 14 is also formed with a second transverse cutting guide line 72 in the same manner as the left side wall 13 .
The entire wall portion 10 is vertically partitioned by the front and rear first cross-cutting guide lines 71, 71 and the left and right second cross-cutting guide lines 72, 72. As shown in FIG.

A recess 81 is formed in the upper edge of the left inner flap 16b of the front end wall 11 (see FIG. 2). The recessed portion 81 is a portion formed by recessing the left end (the end on the left side wall 13 side) of the upper edge of the left inner flap 16b downward.
A recess 81 separates the upper edge of the left inner flap 16 b from the front edge of the left sidewall 13 . That is, the upper end of the ruled line between the left inner flap 16b and the left wall 13 is cut open.

A vertical cutting guide line 82 is formed on the ruled line between the left inner flap 16 b of the front end wall 11 and the left side wall 13 . The vertical cutting guide line 82 is a perforated line in which curved cuts are intermittently formed.
The upper end of the vertical cutting guide line 82 is continuous with the lower end of the recessed portion 81 . As a result, the upper end of the vertical cutting guide line 82 is continuous with the front end of the top cutting guide line 60 via the recess 81 .
A lower end portion of the vertical-cutting guide wire 82 is continuous with a point of contact between the first transverse-cutting guiding wire 71 and the second transverse-cutting guiding wire 72 .

The right inner flap 16b of the rear end wall 12 is also formed with a recess 81 in the same way as the left inner flap 16b of the front end wall 11 is. A ruled line between the right inner flap 16b of the rear end wall 12 and the right side wall 14 also has a vertical cutting line 82 similar to the vertical cutting line 82 between the front end wall 11 and the left side wall 13. formed.

The top plate 20 is formed with a top ruled line 90 extending from the opening start portion 50 toward the other of the two sets of diagonal corners of the top plate 20 (the right front corner 22 and the left rear corner 23). It is
The top crease 90 is a linear groove (press crease) formed by pressing the inner surface (lower surface) of the top plate 20 . In each figure of the first embodiment, the outer surface (upper surface) of the top plate 20 is indicated by a solid line in order to show the position of the top ruled line 90 in an easy-to-understand manner.
The top ruled line 90 is formed on the other diagonal line of the two sets of diagonal lines of the top plate 20 (the diagonal line connecting the right front corner 22 and the left rear corner 23 of the top plate 20).

The joint piece 15 of the first embodiment is formed with a ruled line 15a that overlaps the top cutting guide line 60 and a ruled line 15b that overlaps the top ruled line 90 .

Next, a procedure for opening the packaging box 1 of the first embodiment will be described.
First, an operator pushes the cover plate 51 in the opening start portion 50 of the top plate 20 shown in FIG.

Subsequently, as shown in FIG. 3, the operator puts his or her fingertip on the edge of the opening of the unsealing start portion 50, and pulls the top plate 20 from one diagonal line connecting the left front corner 21 and the right rear corner 24. Also pull up the right and left half parts respectively.
As a result, the top cutting guide line 60 is cut open from the unsealing start portion 50 toward the left front corner 21 and the right rear corner 24 .
At this time, the top plate 20 is bent upward with the top ruled line 90 as the folding line, so that the top plate 20 can be largely pulled out upward.

Since the front and rear corners of the joining piece 15 are bent at the ruled lines 15a and 15b (see FIG. 2), the corners of the joining piece 15 may get caught on the top plate 20 when the top cutting guide line 60 is cut open. The bend of the top ruled line 90 is not hindered.

When the top cut guide line 60 is cut to the left front corner 21, it reaches the recess 81 in the left inner flap 16b of the front end wall 11. As shown in FIG. As a result, the upper end of the ruled line between the front end wall 11 and the left side wall 13 is cut open.

Furthermore, when the right half of the top plate 20 is lifted, as shown in FIG.
When the longitudinal cutting guide line 82 is cut open to the lower end, the first transverse cutting guide line 71 of the left inner flap 16b of the front end wall 11 is cut open, and then the first transverse cutting guide line 71 of the right inner flap 16b of the front end wall 11 is cut open. A cutting guide line 71 is cut open. After that, the second transverse cutting guide line 72 of the right side wall 14 is cut open rearward from the front end.

Further, when the top cutting guide line 60 is cut to the right rear corner 24, it reaches the recess 81 of the right inner flap 16b of the rear end wall 12. As shown in FIG. As a result, the upper end of the ruled line between the rear end wall 12 and the right side wall 14 is cut open.
Furthermore, after the vertical cutting guide line 82 on the rear side is cut open downward from the recessed portion 81, the second transverse cutting guide line 72 of the right side wall 14 is cut open forward from the rear end portion.

When the entire second transverse cutting guide line 72 of the right side wall 14 is cut open, the front end wall 11 and the right side wall 14 of the wall portion 10 are divided into upper and lower parts, and the right half of the top plate 20, the upper part of the front end wall 11 and the right side wall 14 are separated. The upper part is cut off from the packaging box 1 .

On the other hand, when the operator pulls up the left half of the top plate 20, the first transverse cutting guide line 71 of the right inner flap 16b of the rear end wall 12 is cut open, and then the left inner flap 16b of the rear end wall 12 is cut open. A first transverse cutting guide line 71 is cut open. After that, the second transverse cutting guide line 72 of the left side wall 13 is cut forward from the rear end. Also, the second transverse cutting guide line 72 of the left side wall 13 is cut open from the front end toward the rear.

When the entire second transverse cutting guide line 72 of the left side wall 13 is cut open, the rear end wall 12 and the left side wall 13 of the wall portion 10 are divided into upper and lower parts, the left half of the top plate 20, the upper part of the rear end wall 12 and the left side wall. The upper part of 13 is cut off from the packaging box 1 .
In this way, when the packaging box 1 is opened, the lower part of the packaging box 1 becomes a tray, so that the contents can be displayed in the tray.

In the packaging box 1 as described above, as shown in FIG. 3, when the top plate 20 is lifted by putting a fingertip on the opening start portion 50, the top plate 20 is bent upward along the top ruled line 90. As a result, in the packaging box 1, the top plate 20 can be largely pulled upward with a small force to cut open the top cutting guide line 60, so that the packaging box 1 can be easily unsealed to form a tray.

In the packaging box 1 of the first embodiment, when the top cutting guide line 60 is cut open to the end, the recess 81 between the front end wall 11 and the left side wall 13 and the recess between the rear end wall 12 and the right side wall 14 are formed. Part 81 is reached. Since the vertical cutting guide line 82 is continuous with the recessed portion 81 , the vertical cutting guide line 82 can be smoothly cut open following the top cutting guide line 60 .

In the packaging box 1 of the first embodiment, vertical cutting guide lines 82 are formed on the ruled lines between the end walls 11, 12 and the side walls 13, 14, as shown in FIG. In this way, even if the vertical cutting guide line 82 is formed on the wall portion 10, the decrease in the strength of the wall portion 10 can be suppressed.

Although the first embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment and can be appropriately modified without departing from the scope of the invention.
As shown in FIG. 1, the packaging box 1 of the first embodiment has a top plate 20 and a bottom plate 30 formed in a quadrilateral shape, but the shape of the top plate 20 and the bottom plate 30 is not limited, and may be a pentagon or a hexagon. A shape having more corners than a quadrangle may be used.
In this case, the top plate 20 has a top cutting guide line 60 extending from the opening start portion 50 toward one of the plurality of diagonal corners of the top plate 20, and a plurality of pairs of the top plate 20 from the opening start portion 50. Extend the top rule 90 toward the other diagonal of the corners.

In the packaging box 1 of the first embodiment, the opening start portion 50 is formed in the central portion of the top plate 20, but the position of the opening start portion 50 is not limited. The position of the opening start section 50 is set. Further, although the unsealing start portion 50 in the first embodiment is an opening, the shape of the unsealing start portion 50 is not limited, and for example, the unsealing start portion may be configured by a slit.

In the packaging box 1 of the first embodiment, the top cut guide line 60 is formed on one diagonal line of the top plate 20, and the top cut guide line 90 is formed on the other diagonal line. It is not necessary to form ruled lines on diagonal lines. Also, the top cutting guide wire 60 may be bent or curved.

In the packaging box 1 of the first embodiment, the vertical cutting guide lines 82 are formed on the ruled lines between the end walls 11, 12 and the side walls 13, 14. It may be formed in the walls 11,12 or the side walls 13,14.

In the packaging box 1 of the first embodiment, the upper and lower outer flaps 16a, 16a are arranged with an interval in the vertical direction, but the upper and lower outer flaps 16a, 16a may be butted against each other.

The packaging box 1 of the first embodiment is a wrap-around corrugated cardboard box, but the format of the packaging box of the present invention is not limited. For example, the present invention may be applied to an A-type cardboard box.
Although the packaging box 1 of the first embodiment is made of cardboard, the packaging box may be made of various known paperboards.

[Second embodiment]
Next, 1 A of packaging boxes of 2nd embodiment are demonstrated.
As shown in FIG. 5, the packaging box 1A of the second embodiment has substantially the same configuration as the packaging box 1 of the first embodiment (see FIG. 1). , the configuration of the top ruled line 190 is different.

The opening start part 150 of the second embodiment is formed in the central part of the top plate 20 and includes a linear slit 151 extending in the front-rear direction, and front and rear openings connected to the front and rear ends of the slit 151, respectively. It is composed of parts 152 and 152 . In the state of the blank sheet, the front and rear openings 152, 152 are closed by cover plates.

The top cutting guide line 160 of the second embodiment extends from the front opening 152 toward the left front corner 21 and extends from the rear opening 152 toward the right rear corner 24. . Thus, the top cutting guide line 160 extends from the opening start portion 150 toward one of the two sets of diagonal corners of the top plate 20 .

The top ruled line 190 of the second embodiment extends from the front opening 152 toward the right front corner 22 and extends from the rear opening 152 toward the left rear corner 23 . Thus, the top ruled line 190 extends from the opening start portion 150 toward the other of the two pairs of diagonal corners of the top plate 20 .

In the packaging box 1A of the second embodiment as described above, when the top plate 20 is lifted by hooking the fingertips on both openings 152, 152 of the unsealing start portion 150, the top plate 20 is directed upward with the top ruled line 190 as a folding line. Bend. As a result, in the packaging box 1A, the top plate 20 can be largely pulled upward with a small force to cut open the top cutting guide line 160. As shown in FIG.

In addition, in the packaging box 1A of the second embodiment, the cover plate of the opening start part 150 can be made smaller than the opening start part 50 (see FIG. 1) of the first embodiment. The opening start part 150 can be easily arranged according to the arrangement of the contents so that the cover plate does not interfere with the contents when the contents are pushed.

1 packaging box (first embodiment)
1A packaging box (second embodiment)
REFERENCE SIGNS LIST 10 Wall 11 Front end wall 12 Rear end wall 13 Left side wall 14 Right side wall 15 Joining piece 16a Outer flap 16b Inner flap 16c Hand hole 20 Top plate 30 Bottom plate 50 Opening start part (first embodiment)
51 cover plate 60 top cutting guide line (first embodiment)
71 first cross-cutting guide line 72 second cross-cutting guide line 81 recess 82 vertical cut guide line 90 top ruled line (first embodiment)
150 Opening start part (second embodiment)
151 slit 152 opening 160 top cutting guide line (second embodiment)
190 top ruled line (second embodiment)
S blank sheet

Claims (1)

a cylindrical wall portion having a pair of front and rear end walls and a pair of left and right side walls;
a bottom plate connected to the lower edge of the wall;
and a top plate connected to the upper edge of the wall,
An opening start portion is formed in the central portion of the top plate,
The top plate includes:
a top cutting guide line extending from the opening start portion toward one diagonal;
and a top ruled line extending from the opening start portion toward another diagonal corner,
In the wall part,
a transverse cutting guide line that divides the wall into upper and lower parts;
a longitudinal cutting guide line continuing from the end of the top cutting guide line to the transverse cutting guide line ;
The vertical cutting guide line is formed on a ruled line between the end wall and the side wall,
The end wall is
a pair of upper and lower outer flaps respectively connected to the top plate and the bottom plate;
a pair of left and right inner flaps connected to the left and right side walls, respectively;
The upper and lower outer flaps are superimposed on the outer surfaces of the left and right inner flaps,
A concave portion that is concaved downward is formed at the end of the upper edge of the inner flap,
The packaging box , wherein the top cut guide line and the vertical cut guide line are continuous through the recess .

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