JP7203634B2 - packaging box - Google Patents

Description

TECHNICAL FIELD The present invention relates to a packaging box that is opened by a breakable line.

Conventionally, this type of packaging box is a so-called wrap-around type packaging box, in which a pair of inner flaps are connected to both side edges of the side wall plate from a break start portion formed in the center of the opposed long side surfaces. There is known one in which a breakable line is formed up to the tip edge. (See Patent Document 1).

In this type of packaging box, fingers are inserted into each break start portion and the upper half of the side wall plate is pulled outward, thereby breaking the periphery of the packaging box and dividing it into upper and lower parts, thereby forming the lower half into a tray. It can be opened while keeping

Registered Utility Model No. 3049479

However, in the packaging box of Patent Document 1, the side wall plate and the inner flap are bent at a right angle. However, it is not easy to break the inner flap along the breakable line.

In view of the above points, an object of the present invention is to provide a packaging box that can be easily torn along a breakable line continuously from one side surface to a side surface adjacent to the one side surface.

In order to achieve such an object, the packaging box of the present invention comprises a rectangular tube-shaped body portion composed of a plurality of side plates, a pair of closing portions for closing the open end of the body portion, and one side plate to the one side plate. A paper packaging box having a breakable line formed across another side plate adjacent to the side plate or a closed portion adjacent to the one side plate, wherein the one side plate in which the breakable line is formed At the boundary including the ridgeline between the other side plate adjacent to the one side plate or the closed portion adjacent to the one side plate, a pair of ridges extending in the direction intersecting the ridgeline at positions sandwiching the breakable line , a pair of obtuse-angled fold lines connecting the opposing ends of the pair of cut lines, and an inclined surface portion surrounded by the pair of cut lines and the pair of obtuse-angled fold lines are formed. It is characterized by

In the packaging box of the present invention, the breakable line is formed from the side plate to the side plate (or the closed portion) adjacent to this side plate. An inclined surface portion connecting the two plates at an obtuse angle is formed at the boundary between this side plate and the adjacent side plate (or closed portion), and the breakable line passes through this inclined surface portion.

Therefore, in the packaging box of the present invention, after breaking the breakable line provided on the side plate, breaking the breakable line provided on the inclined surface portion connected to the side plate at an angle of more than 90 degrees, In order to break the breakable line provided on the adjacent side plate (or blocking portion) that is connected to the inclined surface portion at more than 90 degrees, the force that caused the side plate to break is applied to the adjacent side plate (or blocking portion) sequentially. It can be transmitted smoothly.

Therefore, according to the packaging box of the present invention, it is possible to easily break along the breakable line continuously from one side to the side adjacent to the one side.

Further, in the packaging box of the present invention, the body portion includes a top plate, a bottom plate and a pair of side wall plates, and the closing portion includes a pair of inner flaps connected to the side wall plates, the top plate and the and a pair of outer flaps connected to the bottom plate and fixed to the outer surface of the inner flap, the leading edges of the pair of outer flaps facing each other with a gap, and the breakable line It is formed from the middle portion of the side wall plate to the tip edge of each inner flap connected to both side edges of the side wall plate, and along the gap sandwiched between the tip edges of the pair of outer flaps among the inner flaps. It is preferably extended

According to the packaging box having this configuration, in a so-called wrap-around type packaging box, the side wall plate and the vertical central portion of the inner flap to which the outer flap is not fixed can be broken. It can be divided into upper and lower parts so that the lower half can be shaped like a tray.

In the packaging box having this configuration, the side wall plate further includes a fold line and a bent or curved breakable line for finger insertion that connects both ends of the fold line, and the vertical direction of the side wall plate is surrounded by the broken line. A breakage starting portion formed below the center is formed so as to straddle the breakable line, and the breakable line gradually separates from the bottom plate from the breakage start portion toward the tip edge of the inner flap and the bottom plate. It is preferable that it is formed in a curved shape that protrudes toward.

According to the packaging box having this configuration, by rotating the upper half of the side wall plate about the ridge line between the top plate and the side wall plate, the side wall plate can be broken along the breakable line. . At this time, since the breakable line is broken from the breaking start portion formed below the vertical center of the side wall plate, the distance from the rotation axis can be increased, so the side wall plate can be broken with a relatively small force. can be made

In addition, in the packaging box having this configuration, since it is formed in a curved shape that gradually separates from the bottom plate and protrudes toward the bottom plate from the break start portion toward the tip edge of the inner flap, both break start portions are formed. When pulled in a direction away from the packaging box, the breakable line as a whole approaches an arc shape, so that it can be smoothly broken sequentially.

The perspective view which shows the packaging box in this embodiment. FIG. 2 is an exploded view of the packaging box of FIG. 1; FIG. 4 is an explanatory view for explaining the process of unpacking the packaging box of FIG. 1 and is a perspective view showing the process of breaking the side wall plate; FIG. 4 is an explanatory diagram for explaining the unpacking process of the packaging box of FIG. 1 and is a perspective view showing the process of breaking the inclined surface portion; 1. It is an explanatory view for explaining the unpacking process of the packaging box of FIG. 1, Comprising: The perspective view which shows the state which fracture|ruptured the inner flap and made the lower half part of the packaging box into the shape of a tray.

One embodiment of the present invention will be described based on the drawings. As shown in FIG. 1, the packaging box 1 of this embodiment has a rectangular parallelepiped appearance, and contains contents (not shown) inside.

The packaging box 1 is a so-called wrap-around case, and includes a horizontally extending body portion 2 and a pair of closing portions 3 that close open ends of the body portion 2 .

The body portion 2 is composed of four side plates: a bottom plate 21 , a pair of side wall plates 22 standing from the bottom plate 21 , and a top plate 23 connecting the tip edges of the side wall plates 22 .

The closing portion 3 includes a pair of inner flaps 31 connected to the side wall plate 22 , a lower outer flap 32 connected to the bottom plate 21 , and an upper outer flap 33 connected to the top plate 23 .

In the packaging box 1, a breakable line 4 extends horizontally from the central portion of the side wall plate 22 to the leading edges of the inner flaps 31 that are connected to both side edges. A fracture starting portion 5 is formed in the central portion of the side wall plate 22 so as to straddle the fracture-possible line 4 .

A substantially rectangular slanted surface portion 6 is formed in the vertical intermediate portion of the boundary between the side wall plate 22 and the inner flap 31 .

As shown in FIG. 2, the packaging box 1 is assembled from corrugated cardboard 10 punched into a substantially rectangular shape.

The corrugated paperboard 10 includes a bottom plate 21, side wall plates 22 connected to the right edge of the bottom plate 21 via a fold line a, and a ceiling connected to the right edge of the side wall plate 22 via a fold line b. It has a plate 23, a side wall plate 22 connected to the left edge of the bottom plate 21 via a fold line a, and an adhesive piece 24 connected to the left edge of the side wall plate 22 via a fold line c. .

Inner flaps 31 are connected to the upper and lower edges of both side wall plates 22 via fold lines d. Lower outer flaps 32 are connected to the upper and lower edges of the bottom plate 21 via fold lines e. Upper outer flaps 33 are continuously provided at the upper and lower edges of the top plate 23 via fold lines f.

Each of the lower outer flap 32 and the upper outer flap 33 has an abutting portion 34 extending in a direction away from the proximal end at the central portion of the tip edge, and has a substantially "convex" shape as a whole. The height from the base end of the lower outer flap 32 and the upper outer flap 33 to the tip of the abutting portion 34 (length in the vertical direction in FIG. 2) is approximately half the lateral width of the inner flap 31 . On the other hand, the length from the proximal end to the distal end of the inner flap 31 is less than half the lateral width of the lower outer flap 32 and the upper outer flap 33 .

Further, the side wall plate 22 and both inner flaps 31 are formed with a breakable line 4 extending from the tip of one inner flap 31 through the side wall plate 22 to the tip of the other inner flap 31 . The breakable line 4 curves convexly toward the bottom plate 21 and draws an arc.

The breakable line 4 is an intermittent cut, and each unit cut is mainly connected to a straight cut 41 extending along the breaking direction and the end of the straight cut 41 on the side of the fold line g. It consists of an auxiliary cut 42 extending in a direction away from and is formed in a substantially "F" shape.

A crease line g extending parallel to the crease lines a and b is formed in the vertical central portion of the breakable line 4 . The crease line g is provided at the center in the height direction and on the side of the bottom plate 21 from the center in the left-right direction.

Both ends of the fold line g are connected by a breakable line 51 for inserting a finger in a substantially inverted "M" shape. Finger-insertion breakable line 51 is formed by intermittent cuts. The breakage initiation portion 5 of the present invention is composed of the crease line g and the breakable line 51 for finger insertion.

At the boundary between the side wall plate 22 and the inner flap 31, a pair of cut lines 61 are provided so as to sandwich the breakable line 4 so as to extend in a direction perpendicular to the boundary line which will be a ridgeline when the boxes are made. The pair of cut lines 61 are provided with obtuse crease lines h so as to connect the upper ends and the lower ends thereof.

The crease line d described above is provided outside the region surrounded by the pair of cut lines 61 and the pair of obtuse crease lines h on the boundary line between the side wall plate 22 and the inner flap 31 .

Next, the process of forming the packaging box 1 shown in FIG. 1 from the corrugated board 10 shown in FIG. 2 having the above structure will be described.

First, a plurality of contents (not shown) are aligned and placed on the bottom plate 21, and each side wall plate 22 is erected through the folding line a.

Next, the inner flap 31 is folded at a substantially right angle with respect to the side wall plate 22 via the folding line d. At this time, the area surrounded by the pair of obtuse fold lines h and the pair of cut lines 61 is bent at approximately 135 degrees with respect to the side wall plate 22 and the inner flap 31 by the obtuse fold lines h.

Next, the lower outer flaps 32 continuously provided on both sides of the bottom plate 21 are erected via the fold line e and adhered to the outer surface of each inner flap 31 via an adhesive.

Subsequently, the adhesive strip 24 is folded horizontally along the folding line c, the top plate 23 is folded parallel to the bottom plate 21 through the folding line b, and the top plate 23 is placed on the outside of the adhesive strip 24 via an adhesive. glued together.

After that, the upper outer flaps 33 continuously provided on both sides of the top plate 23 are bent downward along the folding lines f, and the abutting portions 34 of the lower outer flaps 32 and the upper outer flaps 33 are abutted against each other.

The upper outer flap 33 is adhered to the outer surface of each inner flap 31 with an adhesive. At this time, the breakable line 4 provided on the inner flap 31 is arranged between the leading edge of the lower outer flap 32 and the leading edge of the upper outer flap 33 in most of the portion except for the leading end. In other words, the breakable line 4 is formed in a region of the inner flap 31 where the lower outer flap 32 and the upper outer flap 33 are not overlapped.

As described above, the packaging box 1 shown in FIG. 1 is formed at the same time as the packaging of the contents is completed.

Next, the unpacking work of the packaging box 1 of this embodiment will be described.

When unpacking the packaging box 1, first, as shown in FIG. As a result, the breakable line 51 for finger insertion is broken, and the break start portion 5 is folded back to the inner surface of the side wall plate 22 along the crease line g, and the side wall plate 22 is gripped.

Next, by pulling the upper inner surface of the side wall plate 22 toward the outer surface side, the breakable line 4 is broken in the direction of the left and right side edges. At this time, since the upper side of the side wall plate is connected to the top plate 23 by the folding lines b and c, it rotates obliquely upward with the folding lines b and c as the rotation axis.

Furthermore, when the upper side of the side wall plate 22 is pulled in a direction away from the outer surface side, the breakable line 4 is broken up to the left and right side edges of the side wall plate 22, and then, as shown in FIG. The breakable line 4 provided is broken, and finally, a part of the breakable line 4 provided on the inner flap 31 is also broken.

Next, when the upper half of the packaging box 1 is pulled upward, the packaging box 1 is divided into upper and lower parts, and the lower half is formed like a tray.

According to the packaging box 1 described above, the breakable line 4 is provided from the bottom plate 21 side toward the left and right side edges from the center in the vertical direction in FIG. Since the distance from the line of sight b, c) can be increased, the side wall plate can be broken with a relatively small force.

Further, in the packaging box 1, the breakable line 4 is formed in a curved shape that gradually separates from the bottom plate 21 and protrudes toward the bottom plate 21 from the break start portion 5 toward the tip edge of the inner flap. Therefore, when the breakage starting portion 5 is pulled in the direction away from the packaging box, the possible breakage line 4 approaches an arc shape as a whole, so that it can be smoothly broken sequentially.

In the packaging box 1 , an inclined surface portion 6 is formed at the boundary between the side wall plate 22 and the inner flap 31 to connect them at an obtuse angle, and the breakable line 4 passes through this inclined surface portion 6 . Therefore, in the packaging box 1, after breaking the breakable line 4 provided on the side wall plate 22, the breakable line 4 provided on the inclined surface portion 6 connected to the side wall plate 22 at about 135 degrees is broken. Then, the rupturable line 4 provided on the inner flap 31 that is connected to the inclined surface portion 6 at approximately 135 degrees is broken. Therefore, the force for breaking the side wall plate 22 can be smoothly transmitted to the inner flap 31 via the inclined surface portion 6 .

In addition, in the packaging box 1, since the inclined surface portion 6 is formed by the pair of cut lines 61, by leaving the folding line d, the vertical ridge line that becomes the beam of the packaging box 1 and the inclined surface portion 6 are compatible. , the strength of the box and the ease of breakage can be compatible.

Furthermore, in the packaging box 1, the height from the base end of the lower outer flap 32 and the upper outer flap 33 to the tip of the abutment portion 34 (length in the vertical direction in FIG. 2) is about half the width of the inner flap 31. is. Therefore, the lower outer flap 32 and the upper outer flap 33 are not overlapped at the widthwise central portion of the inner flap 31, and the breakable line 4 is formed in this non-overlapping region.

Therefore, according to the packaging box 1, the inner flap 31 can be easily broken, and the bottom plate 21, the side wall plate 22, the lower half of the inner flap 31, and the lower outer flap 32 allow the bottom of the packaging box 1 to be opened. The halves can be made into trays.

Modifications of the present invention will be described below.

In the present embodiment described above, a so-called wrap-around case has been described as an example, but the present invention may be a so-called A-type or B-type corrugated cardboard case.

In addition, in the present embodiment, corrugated paperboard is used as a material, but the present invention may be applied to other paper materials such as cardboard.

Further, in the present embodiment, an example in which the breakage start portion 5 is formed so as to straddle the breakable line 4 has been described, but the breakage start portion 5 may be omitted.

In addition, in the present embodiment, an example of a substantially rectangular inclined surface portion 6 has been described, but the present invention is not limited to this. can also be formed.

In addition, in the present embodiment, an example of the breakable line 4 that is convexly curved downward has been described. It may be wavy or linear.

Further, in the present embodiment, the breakable line 4 has been described as an example in which the unit cuts are formed in a roughly "F" shape, but the present invention is not limited to this, and simple linear cuts It may be provided on the ground, or it may be a zipper.

1 Packaging box 2 Body 21 Bottom plate 22 Side wall plate 23 Top plate 3 Blocking part 31 Inner flap 32 Lower outer flap 33 Upper outer flap 4 Breakable line 5 Break start part 51 Finger insertion breakable line 6 Inclined surface part 61 Cut line g Crease line h Obtuse angle crease line

Claims (3)

A rectangular tube-shaped body portion composed of a plurality of side plates, a pair of closing portions for closing the open end of the body portion, and another side plate adjacent to the one side plate from one side plate or adjacent to the one side plate In a paper packaging box having a breakable line formed over the closure,
At the boundary including the ridge line between the one side plate on which the rupturable line is formed and the other side plate adjacent to the one side plate or the closed portion adjacent to the one side plate, at a position sandwiching the rupturable line A pair of score lines extending in a direction intersecting the ridgeline, a pair of obtuse angle crease lines connecting the opposing ends of the pair of score lines, and the pair of score lines and the pair of obtuse angles A packaging box characterized by forming an inclined surface portion surrounded by fold lines. In the packaging box according to claim 1,
The body portion comprises a top plate, a bottom plate and a pair of side wall plates,
The closing part comprises a pair of inner flaps connected to the side wall plate and a pair of outer flaps connected to the top plate and the bottom plate and fixed to the outer surface of the inner flap,
tip edges of the pair of outer flaps face each other with a gap,
The breakable line is formed from the intermediate portion of each side wall plate to the leading edge of each inner flap connected to both side edges of the side wall plate, and is formed at the leading edge of the pair of outer flaps among the inner flaps. A packaging box extending along the sandwiched gap. In the packaging box according to claim 2,
The side wall plate includes a fold line and a breakage start formed below the center of the side wall plate in the vertical direction, surrounded by a bent or curved breakable line for finger insertion that connects both ends of the fold line. The part is formed to straddle the breakable line,
The packaging box, wherein the breakable line is formed in a curved shape that gradually separates from the bottom plate and protrudes toward the bottom plate from the break start portion toward the leading end edge of the inner flap.

Images