JP6409671B2 - Packaging box - Google Patents

Description

  The present invention relates to a packaging box.

  When discarding a wrap-round packaging box, each of the flaps constituting the side wall is peeled off and separated, and the packaging box is folded into a rectangular tube shape (for example, patent document) 1).

JP 2003-26154 A

  As described above, the conventional wrap round type packaging box needs to separate all the flaps on the side wall when folded, and thus there is a problem that the disposal work of the packaging box becomes complicated.

  An object of the present invention is to solve the above-described problems and provide a wrap-round packaging box that can be easily folded.

In order to solve the above-mentioned problem, a packaging box of the present invention includes a bottom plate, a pair of front and rear end walls connected to the front and rear edge portions of the bottom plate, and a top plate connected to the upper edge portions of the both end walls. And a pair of left and right side walls, and an opening is formed in the top plate. The side wall includes front and rear side flaps that are connected to the both end walls, an upper flap that is connected to the top plate, and a lower flap that is connected to the bottom plate. The upper flap and the lower flap are joined to the outer surfaces of the front and rear side flaps. A first ruled line extending in the left-right direction is formed at the center portion in the front-rear direction of the bottom plate and the top plate, and the center portion in the front-rear direction of the upper flap and the lower flap extends in the up-down direction. A second ruled line is formed. The top plate is formed with perforated upper cutting lines extending from the opening to the front, back, left and right corners of the top plate. The lower flap is formed with a pair of front and rear perforated lower cutting lines from the middle portion of the upper edge portion to the front and rear end portions of the lower edge portion, and the front and rear edge portions of the bottom plate, A pair of lock pieces are formed symmetrically with respect to the first ruled line as an axis of symmetry, and the lock pieces are formed by separating a part of the bottom plate, and the first ruled line is formed at the left and right edges of the bottom plate. In addition, left and right lower openings are formed at positions where the second ruled lines intersect.

When the packaging box of the present invention is folded, each top cutting line of the top plate is cut open, and the top plate is separated into four parts, front, rear, left and right. Moreover, the lower cutting line is cut open, and the middle part of the lower flap is cut off from the side wall. As a result, the bottom plate, the top plate, and both side walls can be folded in half at the center in the front-rear direction.
Therefore, in the present invention, when the wrap round type packaging box is discarded, the packaging box can be easily folded without separating all the flaps on the side wall.

Moreover, when the packaging box is folded, the front and rear locking pieces overlap. When the two lock pieces are overlapped and bent, the other lock piece is inserted into and engaged with the cutout hole from which one lock piece is cut out. Thereby, since a bottom plate is hold | maintained in the folded state, it can prevent that the folded packaging box swells with a restoring force.
In addition, when the lock piece is formed on the end wall or the side wall, the strength of the packaging box against the pressing force from above is lowered. However, since the lock piece of the present invention is formed on the bottom plate, the strength of the packaging box is reduced. Decline can be prevented.

In the packaging box described above, it is preferable that the first ruled line is formed on the inner surfaces of the bottom plate and the top plate, and the second ruled line is formed on the inner surfaces of the upper flap and the lower flap.
In this configuration, the ruled line formed in the bottom plate, the top plate, and the central portion of the side wall cannot be seen from the outside of the packaging box, so that the appearance of the packaging box can be improved.

  In the present invention, since the wrap-round packaging box can be easily folded, the disposal operation of the packaging box can be simplified.

It is the figure which showed the packaging box which concerns on embodiment of this invention, and is the perspective view seen from the front upper side. It is the figure which showed the packaging box which concerns on embodiment of this invention, and is the perspective view seen from the back lower side. It is the blank sheet which showed the packaging box which concerns on embodiment of this invention. It is the figure which showed the procedure which folds the packaging box which concerns on embodiment of this invention, and is the perspective view which looked at the state which opened the upper cutting line and the lower cutting line from the front upper side. It is the figure which showed the procedure which folds the packaging box which concerns on embodiment of this invention, and is the perspective view which looked at the state which opened the upper cutting line and the lower cutting line from the back lower side. It is a perspective view of the state which folded the packaging box which concerns on embodiment of this invention. It is the expansion perspective view which showed the lock piece which concerns on embodiment of this invention.

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, and right directions are set for convenience in describing the packaging box 1 and do not limit the configuration of the packaging box 1.

  As shown in FIG. 1, the packaging box 1 is a wrap-round rectangular parallelepiped box, and 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. I have.

As shown in FIG. 3, the packaging box 1 is formed by folding a blank sheet S obtained by cutting out a sheet of corrugated cardboard on each ruled line. The blank sheet S shown in FIG. 3 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.

  As shown in FIG. 2, the bottom plate 10 is formed in a rectangular shape, and is formed so that the left-right direction is larger than the front-rear direction. A pair of front and rear end walls 11 and 12 are connected to the front and rear edges of the bottom plate 10 via ruled lines L1 and L2 (see FIG. 3).

As shown in FIG. 1, the front end wall 11 is raised upward from the front edge of the bottom plate 10. The front end wall 11 is formed at a right angle to the bottom plate 10. The front end wall 11 is formed in a rectangular shape, and is formed so that the left-right direction is larger than the vertical direction.
As shown in FIG. 2, the rear end wall 12 is raised upward from the rear edge of the bottom plate 10. The rear end wall 12 has the same shape as the front end wall 11 (see FIG. 1) and is formed at a right angle to the bottom plate 10.

As shown in FIG. 1, a top plate 15 is connected to the upper edge of the front end wall 11 via a ruled line L3 (see FIG. 3).
The top plate 15 is bent rearward from the upper edge of the front end wall 11. The top plate 15 has the same shape as the bottom plate 10 and is formed at right angles to the front and rear end walls 11 and 12.

As shown in FIG. 2, a joining flap 16 is connected to the rear edge of the top plate 15 via a ruled line L4 (see FIG. 3). The joining flap 16 is formed in a strip shape along the rear edge of the top plate 15.
The joining flap 16 is a part joined to the upper part of the outer surface of the rear end wall 12 by an adhesive. While the blank sheet S (see FIG. 3) is bent along the ruled lines L1 to L4, the joining flap 16 is joined to the outer surface of the rear end wall 12, so that the rear end wall 12, the bottom plate 10, the front end wall 11, and the top plate 15 are square. A cylindrical shape is exhibited (see FIG. 1).

  As shown in FIG. 1, a rectangular upper surface opening 17 is formed at the center of the top plate 15. The upper surface opening 17 is formed larger in the left-right direction than in the front-rear direction. The top plate 15 of the present embodiment is formed by a band-shaped portion formed along the front, rear, left and right edges.

  As shown in FIG. 2, the left side wall 13 is formed at right angles 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 connected to the front end wall 11, a rear side flap 22 connected to the rear end wall 12, and an upper flap 31 connected to the top plate 15. , And a lower flap 32 continuously provided on the bottom plate 10.

  The front side flap 21 is connected to the left edge of the front end wall 11 via a ruled line L5 (see FIG. 3). The front side flap 21 is bent backward from the left edge of the front end wall 11. The front side flap 21 is formed at a right angle to the front end wall 11.

  The rear side flap 22 is connected to the left edge of the rear end wall 12 via a ruled line L6 (see FIG. 3). The rear side flap 22 is bent forward from the left edge of the rear end wall 12. The rear side flap 22 is formed at a right angle to the rear end wall 12.

  The length in the front-rear direction of the side flaps 21, 22 is formed to be about 1/3 of the length in the front-rear direction of the bottom plate 10 and the top plate 15. Therefore, the front and rear side flaps 21 and 22 are arranged at an interval in the front-rear direction.

  The upper flap 31 is connected to the left edge portion of the top plate 15 via a ruled line L7 (see FIG. 3). The upper flap 31 hangs downward from the left edge of the top plate 15. The upper flap 31 is formed at a right angle to the top plate 15.

  The lower flap 32 is connected to the left edge of the bottom plate 10 via a ruled line L8 (see FIG. 3). The lower flap 32 rises upward from the left edge of the bottom plate 10. The lower flap 32 is formed at a right angle to the bottom plate 10.

  The height of the upper flap 31 and the lower flap 32 is formed to be about 1/3 of the height of the front and rear end walls 11 and 12. Therefore, the upper side flap 31 and the lower side flap 32 are arrange | positioned at intervals in the up-down direction.

The upper flap 31 is joined to the outer surface of the upper part of the pair of front and rear side flaps 21 and 22 with an adhesive.
The lower flap 32 is joined to the outer surface of the lower part of the pair of front and rear side flaps 21 and 22 with an adhesive.
Between the upper flap 31 and the lower flap 32, an intermediate portion between the front and rear side flaps 21 and 22 is disposed.
A rectangular side opening 13 a surrounded by the front and rear side flaps 21, 22, the upper flap 31 and the lower flap 32 is formed at the center of the left side wall 13.

As shown in FIG. 1, the right side wall 14 is formed at right angles to the right edge of the bottom plate 10 and the right edge of the top plate 15.
Similar to the left side wall 13 (see FIG. 2), the right side wall 14 includes front and rear side flaps 21 and 22, an upper side flap 31 and a lower side flap 32, and a side opening 14a is formed. The right side wall 14 and the left side wall 13 have a symmetrical shape.

  In the top plate 15 of the present embodiment, four upper and lower cutting lines 41 are formed on the front, rear, left and right sides (see FIG. 3). The upper cutting line 41 is a straight line extending from the corner of the upper surface opening 17 to the corner of the top plate 15.

The upper cutting line 41 is a perforated line in which bent cuts are formed intermittently, and each cut of the upper cutting line 41 passes through the blank sheet S (see FIG. 3).
The upper cutting line 41 is a part that becomes a boundary when the top plate 15 is cut into front, rear, left, and right belt-like parts (see FIG. 4).

As shown in FIG. 2, the lower flap 32 of this embodiment has a pair of front and rear lower cutting lines 42, 42 extending from the middle portion of the upper edge portion of the lower flap 32 to the front and rear ends of the lower edge portion. Is formed.
The upper end portion of the lower cutting line 42 is connected to a position where the upper edge portion of the lower flap 32 intersects with the inner edge portions of the side flaps 21 and 22. The lower end of the lower cutting line 42 is connected to the end of the lower edge (ruled line L8) of the lower flap 32.

The lower cutting line 42 is a perforated line in which bent cuts are formed intermittently, and each cut of the lower cutting line 42 passes through the blank sheet S (see FIG. 3).
The lower cutting line 42 is a part serving as a boundary when the intermediate portion of the lower flap 32 is cut off from the side walls 13 and 14 (see FIG. 5).

  As shown in FIG. 3, first ruled lines L9, L10 extending in the left-right direction are formed on the inner surfaces of the bottom plate 10 and the top plate 15 of the present embodiment. The first ruled lines L9 and L10 are fold lines for folding the bottom plate 10 and the top plate 15 (see FIG. 6).

  As shown in FIG. 1, the first ruled line L <b> 9 of the top plate 15 is formed on the left and right sides of the upper surface opening 17. The first ruled line L9 is formed at the center portion of the top plate 15 in the front-rear direction.

As shown in FIG. 2, the first ruled line L <b> 10 of the bottom plate 10 is formed at the center in the front-rear direction of the bottom plate 10.
A plurality of cuts C are intermittently formed in the first ruled line L10 of the bottom plate 10. In addition, although the cut C of this embodiment has penetrated the blank sheet S (refer FIG. 3), the half-cut notch which cut the liner and flute (core) of the outer surface side of the baseplate 10 may be sufficient.

  Second ruled lines L11 and L12 extending in the vertical direction are extended on the inner surfaces of the upper flap 31 and the lower flap 32 of the present embodiment. The second ruled lines L11 and L12 of the upper flap 31 and the lower flap 32 are fold lines for folding the side walls 13 and 14 (see FIG. 6).

The second ruled line L11 of the upper flap 31 is formed at the center portion in the front-rear direction of the upper flap 31.
The second ruled line L12 of the lower flap 32 is formed in the center portion of the lower flap 32 in the front-rear direction.
A circular lower opening 43 is formed at a position where the ruled line L8 between the bottom plate 10 and the lower flap 32, the first ruled line L10 of the bottom plate 10 and the second ruled line L12 of the lower flap 32 intersect. ing.

A pair of lock pieces 44 and 44 that are symmetrical with respect to the first ruled line L10 as a symmetry axis are formed at the front and rear edges of the bottom plate 10 (see FIG. 3). Both lock pieces 44, 44 are formed at the center of the bottom plate 10 in the left-right direction.
The lock piece 44 is formed by cutting off a part of the bottom plate 10. The lock piece 44 is formed in a trapezoidal shape so that the width in the left-right direction gradually increases from the inside toward the outside.
The front end edge (outer end edge) of the lock piece 44 is disposed on the front and rear edges (ruled lines L 1, L 2) of the bottom plate 10.

  The lock piece 44 is separated from the bottom plate 10 by a cutting line L13 except for one side (ruled line L14) on the base end side (inner end side). That is, the base end portion (inner end portion) of the lock piece 44 is continuous with the bottom plate 10 via the ruled line L14.

Next, the procedure for folding the packaging box 1 will be described.
As shown in FIG. 4, the operator pulls up each of the front, rear, left and right sides of the inner edge of the upper surface opening 17 of the top plate 15 to open each upper cutting line 41. Thereby, the top plate 15 is separated into four belt-like portions on the front, rear, left and right.
In addition, since each notch of the upper cutting line 41 is bent, when the upper cutting line 41 is cut open, the cutting edge of the upper cutting line 41 has a gentle wavy shape.
Then, the front, rear, left and right belt-like portions of the top plate 15 are raised on the upper edge portions of both end walls 11 and 12 and both side walls 13 and 14.

Subsequently, as shown in FIG. 5, the operator hangs his / her fingertip on the lower edge of the side openings 13a and 14a (see FIG. 1) of the left and right side walls 13 and 14, and the lower flap 32 is outward. By pulling down, the front and rear lower cutting lines 42 and 42 are cut open. Thereby, the intermediate part of the lower side flap 32 is cut | disconnected from the side walls 13 and 14 (side part flaps 21 and 22).
Since each cut of the lower cutting line 42 is bent, when the lower cutting line 42 is cut open, the cutting edge of the lower cutting line 42 has a gentle wavy shape.
Then, the left and right lower flaps 32, 32 are brought into a tilted state so as to be flush with the bottom plate 10.

The first ruled line L10 of the bottom plate 10 and the second ruled lines L12, L12 of the left and right lower flaps 32, 32 are folded into valley folds, and the bottom plate 10 and both lower flaps 32, 32 are moved in the front-rear direction as shown in FIG. Fold it in half.
At this time, since the plurality of cuts C are formed in the first ruled line L10 of the bottom plate 10, the bottom plate 10 can be easily bent.
A lower opening 43 is formed at a position where the ruled line L8 between the bottom plate 10 and the lower flap 32, the first ruled line L10 of the bottom plate 10 and the second ruled line L12 of the lower flap 32 intersect. Therefore, the first ruled line L10 of the bottom plate 10 and the second ruled lines L12, L12 of the lower flaps 32, 32 are easily bent.

  At the same time that the bottom plate 10 and the lower flaps 32, 32 are folded, the first ruled line L9 of the top plate 15 and the second ruled lines L11, L11 of the left and right upper flaps 31, 31 are folded into valley folds, and the top plate 15 and both upper sides are folded. The flaps 31, 31 are folded in the front-rear direction.

  When the bottom plate 10, the top plate 15, and the side walls 13, 14 (the upper flap 31 and the lower flap 32) are folded, the front end wall 11 and the rear end wall 12 are overlapped. Thereby, the packaging box 1 will be in the state folded flat.

When the bottom plate 10 is folded back and forth, the front and rear lock pieces 44 and 44 overlap. Then, as shown in FIG. 7, both lock pieces 44, 44 are folded at the ruled line L <b> 14. In the present embodiment, both lock pieces 44 are bent forward.
When the lock piece 44 is bent with respect to the bottom plate 10, a cutout hole 45 in which the lock piece 44 is cut out is formed in the bottom plate 10.

In the present embodiment, the rear lock piece 44 is inserted into the cutout hole 45 from which the front lock piece 44 has been cut out. The outer peripheral edge of the rear lock piece 44 is engaged with the inner peripheral edge of the front cutout hole 45.
Thereby, since the bottom plate 10 is held in a folded state by the lock piece 44, the folded packaging box 1 can be prevented from expanding due to a restoring force as shown in FIG.

In the packaging box 1 as described above, as shown in FIG. 4, the bottom plate 10, the top plate 15, and the both side walls 13 are cut by opening the upper cutting line 41 of the top plate 15 and cutting the lower cutting line 42 of the lower flap 32. , 14 can be folded in half at the center in the front-rear direction.
Therefore, when the wrap round type packaging box 1 is discarded, the packaging box 1 can be easily folded without separating all the flaps 21, 22, 31, 32 of the side walls 13, 14, so that the packaging box 1 disposal work can be simplified.

  In the packaging box 1 of the present embodiment, as shown in FIG. 2, a pair of front and rear locking pieces 44, 44 are formed on the bottom plate 10. Then, as shown in FIG. 6, after the packaging box 1 is folded, the bottom plate 10 can be held in a folded state by engaging the lock piece 44 with the cutout hole 45, so that the folded packaging The box 1 can be prevented from expanding due to the restoring force.

  In addition, since the lock piece 44 of this embodiment is formed in the bottom plate 10, the strength reduction of the packaging box 1 with respect to the pressing force from above can be prevented.

  In the packaging box 1 of the present embodiment, the first ruled lines L9 and L10 are formed on the inner surfaces of the bottom plate 10 and the top plate 15, and the second ruled lines L11 and L12 are formed on the inner surfaces of the upper flap 31 and the lower flap 32. Yes. Therefore, since the ruled lines L9 to L12 formed at the center of the bottom plate 10, the top plate 15, and the side walls 13 and 14 are not visible from the outside of the packaging box 1, the appearance of the packaging box 1 can be improved.

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.
For example, in the present embodiment, as shown in FIG. 1, the upper surface opening 17 of the top plate 15 is formed in a rectangular shape, but the shape is not limited. For example, the upper opening may be formed in a circular shape, and the upper cutting line 41 extending from the peripheral edge of the upper opening to each corner of the top plate 15 may be formed.

  In the present embodiment, as shown in FIG. 2, two lock pieces 44, 44 are formed on the bottom plate 10, but the number and shape of the lock pieces 44 are not limited.

The first ruled line L10 of the bottom plate 10 of the present embodiment is formed across the left and right edges of the bottom plate 10, and since the length thereof is large, by forming a cut C in the first ruled line L10, the bottom plate 10 Is easy to bend.
The first ruled line L9 (see FIG. 1) of the top plate 15 and the second ruled lines L11 and L12 of the upper flap 31 and the lower flap 32 may also be cut. Alternatively, the cut C may not be formed in the first ruled line L10 of the bottom plate 10.

  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 13a Side opening 14 Right side wall 14a Side opening 15 Top plate 16 Joining flap 17 Top opening 21 Front side flap 22 Rear side flap 31 Upper flap 32 Lower flap 41 Upper cutting line 42 Lower cutting line 43 Lower opening 44 Lock piece 45 Cutout hole S Blank sheet

Claims (2)

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 the both end walls;
A pair of left and right side walls,
An opening is formed in the top plate,
The side wall
Front and rear side flaps respectively connected to the both end walls;
An upper flap connected to the top plate;
A lower flap connected to the bottom plate,
The upper flap and the lower flap are joined to the outer surfaces of the front and rear side flaps,
At the center of the bottom plate and the top plate in the front-rear direction, a first ruled line extending in the left-right direction is formed,
A second ruled line extending in the up-down direction is formed at the center in the front-rear direction of the upper flap and the lower flap,
The top plate is formed with perforated upper cutting lines from the opening to the front, back, left and right corners of the top plate,
The lower flap is formed with a pair of front and rear perforated lower cutting lines from the middle of the upper edge to the front and rear ends of the lower edge ,
A pair of lock pieces are formed on the front and rear edges of the bottom plate symmetrically with respect to the first ruled line as a symmetry axis,
The lock piece is formed by cutting off a part of the bottom plate,
A packaging box , wherein left and right lower openings are formed at positions where the first ruled line and the second ruled line intersect at left and right edges of the bottom plate . The first ruled line is formed on the inner surface of the bottom plate and the top plate,
2. The packaging box according to claim 1, wherein the second ruled line is formed on an inner surface of the upper flap and the lower flap.

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