JP2011240941A - Packaging box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a packaging box by eliminating a drum-like bulge of a body formed of vertical plates of the packaging box used for packaging of a product such as a bottled beverage or a canned beverage.SOLUTION: In the packaging box, buckling guide frame lines which are creased lines forming substantially a rectangle or square shape using a straight or curved line are formed in the pair of vertical plates at positions apart nearly at the same intervals inside from and along the outer peripheral edges of the vertical plates. Auxiliary guide lines guiding an area between the outer peripheral edge of the vertical plate and the buckling guide frame line in a direction expanding outward are arranged between the corner parts of the buckling guide frame lines and the corners of the vertical plates. Cut starting parts for opening the packaging box are arranged in long holes each formed by a pair of outer flap pieces which close upper and lower portions, by using inner flap pieces.

Description

  The present invention relates to an improvement of a wrap-around type packaging box used for packaging food and drink and other products stored in containers such as bottles and cans.

Conventionally, cardboard wrap-around packaging boxes have been used as packaging boxes for bottled beverages and cans.
As this type of packaging box 30, for example, as shown in FIGS. 7 (a) and 7 (b), a pair of elevation plates 21 and 21 ', which are opposed long sides, and an upper surface plate 22 and a lower surface plate 22' are alternately arranged. Provided are inner flap pieces 23 and 23 'on both ends of the elevation plates 21 and 21', and outer flap pieces 24 and 24 'on both ends of the upper surface plate 22 and the lower surface plate 22' to form a short side surface. The sticking allowance 26 is provided on the outside of the elevation plate 21 so that
Then, an upper surface plate 22 and a lower surface plate 22 ′ are arranged above and below the body part which is a pair of end face plates facing each other by overlapping the inner and outer flap pieces 23, 23 ′, 24, 24 ′. In the center of the face plates 21 and 21 ', a cut start portion 28 of the cut tape T for dividing the body portion into upper and lower portions is provided.
However, since the packaging box 30 has a structure in which the load at the time of loading is mainly received by stored items such as plastic bottles and cans, when the contents are packaged and then stacked in a plurality of stages in a pallet loaded state, In long-term storage and storage in a high-temperature and high-humidity environment, the standing plate of the case at the bottom of the stacking swells outward due to the load, causing the case to deform or buckle, and if further deformed, it is stacked The carton may collapse.
Further, as described above, since the packaging box holds the loading load with the stored items such as PET bottles and cans, the above-mentioned problem becomes more remarkable as the weight of the bottles and the like is further reduced.

Therefore, in the packaging box disclosed in Japanese Patent Application Laid-Open No. 2003-146329 (Japanese Patent No. 4004273), a pair of vertical plates and flat plates are connected in series, and a plurality of products arranged vertically and horizontally are rolled up. In a wrap-around type corrugated cardboard packaging box in which flaps continuously connected to the edges are bonded and sealed, a pair of elevation plates, a portion extending obliquely from the corner toward the center, and subsequently the middle Forming a buckling guide line having a portion extending in the horizontal direction with a ruled line, and separating the horizontal portion of the upper and lower buckling guide lines away from these buckling guide lines, and opening a cut-out opening for opening. The provided arrangement is disclosed.
Thereby, in the said structure, since the buckling induction line was provided in the elevation board, even if a load is applied, it bends along a buckling induction line, Therefore An irregular buckling line becomes difficult to appear.
However, in the above configuration, since the opening start portion made of a cut is provided apart from these in the region of the horizontal portion surrounded by the upper and lower buckling guide lines, the strength of the elevation plate is weakened by the cut. was there.
For this reason, if the region surrounded by the buckling guide line is narrowed, the area of the flat surface is reduced and the appearance of the elevation plate cannot be kept clean, and if the cut is shortened, it is difficult to open.

JP 2003-146329 A

  The present invention was devised in view of the above circumstances, and its main problem is to widen the surface surrounded by the buckling guide frame line and prevent it from being deformed into a drum shape due to swelling of the body, and for opening It is an object of the present invention to provide a packaging box in which the cut-off portion is formed in an inner flap piece and the strength of the elevation plate is not impaired.

In order to solve the above-mentioned problems, the present invention provides
A pair of elevation plates serving as the left and right side wall surfaces of the packaging box and a pair of plane plates serving as the upper wall surface and the bottom wall surface are alternately provided. Inner flap pieces are provided at both end edges of each elevation plate. In the wrap-around packaging box where the outer flap pieces are connected to both end edges respectively to become the end wall surface,
Forming a buckling induction frame line composed of a ruled frame of a substantially rectangular frame arranged in a straight line or a curve in parallel along the outer peripheral edge of the elevation plate with the center at the center of the elevation plate. It is provided with auxiliary guide lines for ruled lines extending from each corner portion of the outer peripheral edge of the elevation plate to each corner portion of the buckling guide frame line adjacent thereto,
The opening start portion is provided in an elongated hole formed by an inner flap piece and a pair of outer flap pieces closing the upper and lower sides.
In the invention of claim 2,
The buckling guide frame line is formed by a ruled line having a rectangular shape or a square shape that is spaced inwardly at substantially equal intervals from the four sides of the outer peripheral edge of the elevation plate, and the corner portion is formed at a right angle or an arc shape. Features.
In the invention of claim 3,
The buckling guide frame line is characterized in that a corner portion is formed on a diagonal line of the elevation plate, and the auxiliary guide line extends along the diagonal line.
Furthermore, in the invention of claim 4,
The auxiliary guide line is in contact with a corner portion of the buckling guide frame line or extends to a position near the corner portion.

Since the packaging box of this invention does not need to provide the opening start part which consists of a notch in an elevation board, the intensity | strength of an elevation board is not impaired.
Also, the buckling guide frame line consists of a ruled frame of a substantially rectangular frame centered on the center of the elevation plate (the corner part may be right-angled or curved), and the upper and lower horizontal lines and the left and right vertical lines respectively. Because it is set at a position that is spaced at approximately equal intervals from the outer peripheral edge of the rising surface plate, even if the rising surface swells outward, the region surrounded by the buckling guide frame line is moved substantially in parallel to maintain the flat surface. This can effectively suppress the swelling of the body that swells like a drum.
And since the opening start part for opening is provided in an inner flap piece and arrange | positioned at an end surface board, the intensity | strength of an upright board is not impaired and it becomes possible to set the buckling induction | guidance | derivation frame line widely.
As a result, the upright plate can be surrounded by a buckling guide frame line over a wide range, and a packaging box with no noticeable swelling can be formed.

3 is a development view of a blank of the packaging box of Example 1. FIG. It is a perspective view of the packaging box. It is a figure of the trunk swelling state of the elevation board seen from the end face board side of the packaging box. (A) is a cutting start part, (b) is an enlarged view which shows a holding part. (A) is an end view showing a buckling guide frame line that is spaced inwardly from the outer peripheral edge of the elevation plate, and (b) is a view showing a buckling guide frame line provided along a diagonal line. (A) is an end view of a packaging box in which the corner portion of the buckling guide frame line is arcuate, and (b) is an end surface of the packaging box in which the auxiliary guide line extends to the vicinity of the corner portion of the buckling guide frame line. FIG. (A) The developed view of the blank of the packaging box of a prior art example, (b) It is a figure of the swelling state of the standing board seen from the same end face board side.

  In this invention, a rectangular or square buckling guide frame line is provided on the vertical plate of the trunk, and the corner portion of the vertical plate is connected to the corner of the vertical plate by an auxiliary guide line. The enclosed area was moved almost in parallel to reduce the swelling of the trunk.

[Packaging box]
As shown in FIGS. 1 and 2, the packaging box 10 of the present embodiment is formed of a wrap-around packaging box in which a blank 10 ′ made of cardboard such as cardboard is folded and assembled into a rectangular cylindrical box shape. ing.

  This blank 10 'is formed through a crease in which a pair of upright plates 1, 1' serving as left and right side wall surfaces of the packaging box and a pair of flat plates 2, 2 'serving as an upper wall surface and a bottom wall surface are indicated by dotted lines in the figure. The inner flap pieces 3, 3 ′ are shown at both ends of each of the elevation plates 1, 1 ′, and the outer flap pieces 4, 4 ′ are shown at both ends of each plane plate 2, 2 ′. It is connected continuously through the fold shown by the middle dotted line.

Moreover, the pasting allowance 6 is continuously provided along the outer edge of one elevation board 1 through the fold shown by the dotted line in the figure.
The portion surrounded by a circle at the center of the flat plate 2 indicates the direction of the fiber of the cardboard.

  The packaging box 10 is arranged such that a stored item (not shown) such as a bottled drink is placed on the blank 10 'and the elevation plates 1, 1' and the flat plates 2, 2 'are folded while being folded along the folds. After storing, the edge (shown by hatching in the figure) of the flat plate 2 that becomes the upper wall surface is stacked and bonded together so that the folded pasting allowance 6 is on the inside to form a cylindrical body.

  Next, the inner flap piece 3 ′ is bent inward from one outer side in the left-right direction of the opening along the fold of the elevation plate 1 ′, and the opening side is formed by the pair of inner flap pieces 3 extending in the same direction on the opposite elevation plate 1. Is closed from the other outside in the left-right direction.

  Further, the outer flap pieces 4 and 4 ′ extending in the same direction on the opposing flat plates 2 and 2 ′ are folded inward from above and below the folds so as to overlap the outside of the inner flap pieces 3 and 3 ′. A pair of outer flap pieces 4, 4 ′ are bonded at portions overlapping the inner flap pieces 3, 3 ′ to form an end wall surface that closes the opening of the body portion.

  Here, the upper and lower outer flap pieces 4, 4 ′ are projected after the outer end sides of the convex piece portions 4 a, 4 a ′ protruding at the center and the base end side of the convex piece portions are curved in an arc shape. It has a pair of long hole constituting edge portions 4b, 4b 'extending in a stepped manner to the end portions in the left-right direction in parallel with the tip sides of the pieces 4a, 4a'.

  Therefore, the upper and lower outer flap pieces 4 and 4 'are bent to form a central connecting portion 4A that is in contact with the pair of convex piece portions 4a and 4a' in the vertical direction with almost no gap as shown in FIG. On both sides, the long hole-constituting edges 4b and 4b 'are vertically combined to form a pair of right and left U-shaped long holes 4B that open at the ends.

[Starting part]
In the pair of inner flap pieces 3 provided in the extending direction of each elevation plate 1, cut portions 8, 8 ′ are formed in the inner flap pieces 3 on the opposite side across the elevation plate 1.
As shown in FIG. 4A, the incision portion 8 (same as 8 ') is an inner portion for pressing a finger at a central position slightly spaced from the outer end portion of the inner flap piece 3. A circular arc portion 8a composed of an arc-shaped cut in the direction, a dotted inner guide cut 8b gradually narrowing from both ends of the circular arc portion 8a toward the elevation plate 1, and one end portion of the circular arc portion 8a And an outer guide cut 8 c extending toward the outer end of the inner flap piece 3.
In the present invention, the cut-out portion is not limited to the above-described configuration, such as a circular arc shape or a linear shape, and a known cut-out configuration can be used as appropriate.

  Further, a cut tape (not shown) passes through the elevation plates 1 and 1 'in the longitudinal direction from one inner flap piece 3 and 3', and continues along the center line to the end of the other inner flap piece 3 and 3 '. It is preferable that the section where the inner guide cut 8b is cut and the tip of the cut tape are connected in series.

[Buckling guide frame]
A rectangular buckling guide frame line 9 is formed on each elevating plate 1, 1 ′ by a ruled line, with the center of the elevating plate 1 as a center and a rectangular buckling guide frame line 9 that is inward along the peripheral edge at substantially the same interval.
The buckling guide frame line 9 is composed of upper and lower horizontal lines 9a and 9b and left and right vertical lines 9c and 9d connecting the ends of the upper and lower horizontal lines when the box is assembled. Has been placed.

In the illustrated example, when the elevation plate 1 is a rectangle having a length of 217 mm and a width of 404 mm, the buckling guide frame line 9 is in a position moved inward at the same interval of 20 mm in parallel from the upper and lower and left and right edges of the elevation plate 1. The vertical lines 9c and 9d are set to a rectangle of 177 mm and the horizontal lines 9a and 9b are set to a rectangle of 356 mm (see FIG. 5A).
In this case, the separation length of the buckling guide frame line 9 from the outer peripheral edge portion of the elevation plate 1 is not limited to 20 mm, and may be, for example, in the range of 15 mm to 50 mm. In the present invention, the numerical value is not particularly limited. Absent.

By setting the length substantially equal from each edge, the region surrounded by the buckling guide frame line 9 from the outer peripheral edge of the upright plate 1 can be set wide and can be moved outward in parallel.
In the above embodiment, the buckling guide frame line 9 is rectangular, but may be square.
Further, the length that is spaced in parallel from the edge of the elevation plate 1 is not limited to the above embodiment.

The buckling guide frame line 9 in FIG. 5B is set so that the intersections of the horizontal lines 9 a and 9 b and the vertical lines 9 c and 9 d are located on the diagonal line of the elevation plate 1.
Accordingly, the auxiliary guide wire 7 described later extends along the diagonal line.
In this case as well, the four auxiliary guide wires 7 have the same length and are guided along the diagonal lines, so that swelling of the trunk can be suppressed.
In each of the above-described embodiments, the horizontal lines 9a and 9b and the vertical lines 9c and 9d constituting the buckling guide frame line 9 are formed as straight lines, but the both ends coincide with the both ends of the straight line. A curved curve (not shown) may be used.

This curve is preferably a line that curves so that the center approaches the center of the buckling guide frame line 9 from both ends, but may be a line that curves so that the center approaches the outer peripheral edge.
Further, the horizontal line and the vertical line constituting the buckling guide frame line 9 may be a combination of a straight line and a curved line.
Therefore, the buckling induction frame line 9 is based on a square or a rectangle, but each line segment may be a substantially square or a substantially rectangle composed of straight lines or curves.
Moreover, although the case where the corner part of the buckling induction frame line 9 is a right angle is illustrated, it may be curved in an arc shape as shown in FIGS.

[Auxiliary guide wire]
Further, in this embodiment, four auxiliary guide lines 7 having the same length are connected to each corner of the upright plate 1 by being inclined and connected to the corners of the buckling guide frame 9 adjacent thereto. .
The auxiliary guide line 7 is illustrated as being directly connected to the corner portion of the buckling guide frame line 9, but extends to the vicinity of the corner portion of the buckling guide frame line 9 as shown in FIG. You may not be connected.
In the illustrated example, the corner portion has an arc shape, but may be a right angle.
In addition, since the swelling of the packaging box can be assumed in advance by specifying the stored items, the length of the buckling guide frame 9 can be determined experimentally as appropriate.

Accordingly, when a load is applied from above and below the body portion, the peripheral edge of the elevation plate 1 is bent obliquely along the auxiliary guide wire 7.
Thereby, although the elevation board 1 swells outside, an irregular buckling line does not appear, and since the wide area | region enclosed by the buckling induction | guidance | derivation frame line 9 can maintain a flat surface, it is a drum shape. It does not swell, and can be in contact with adjacent packaging boxes without any gaps.

[Gripping cut]
In the present embodiment, a grip notch 5 is formed on one of the outer flap pieces, in the illustrated example, on the outer flap piece 4 on the upper side when the box is assembled.
As shown in FIG. 4 (b), the grasping cut 5 includes a vertical line 5a provided at the center, and a pair of horizontal lines 5b and 5c extending left and right with a slight gap at the lower end of the vertical line 5a. A top line 5d formed in a small arc shape slightly above the upper end of the vertical line 5a, and a side line 5e that rises obliquely from the left and right horizontal lines 5c, 5c and is bent outward in an arc shape. 5f and upper inclined lines 5g and 5h connecting the side lines 5e and 5f and the top line 5d.
In the present invention, the grip notches need only be capable of forming notches into which fingers can be inserted for gripping, and the position thereof may be either the upper or lower outer flap surface or may not be provided. .

[Notch]
Further, in the case where the grip cut 5 is provided, the end of the inner flap pieces 3, 3 ′ is overlapped with the grip cut 5 when the box is assembled. It is preferable that the substantially semicircular cutouts 11 and 11 ′ are transparently provided so as not to be formed.

[Zipper wire]
Further, the upper surface plate is provided with a zipper wire 12 for opening the entire upper surface.
The zipper wire 12 includes a portion 13 extending in a taper shape from the corner of the upper flat plate 2 toward the center side, and a pair of left and right belt-like portions extending in parallel with the longitudinal side of the flat plate 2 in the middle thereof. 14 and has a shape in which a trigger line 15 for opening is provided in the center of the band-like portion 14.

Thereby, the packaging box can also open the flat plate 2 which becomes an upper wall surface along the zipper wire 12, and the packaging box 10 is divided into two vertically along the cut-off portions 8 and 8 'and used as a tray. You can also
The shape of the zipper wire is not particularly limited in the present invention, and may be other known shapes or may not be provided.
In addition, it goes without saying that various design changes can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1, 1 'Elevation board 2, 2' Plane board 3, 3 'Inner flap piece 4, 4' Outer flap piece 6 Sticking allowance 7, 17 Auxiliary guide wire 8, 8 'Cutout part 9 Buckling guide frame line 10 Packaging Box 10 'blank 11, 11' notch 12 zipper wire

Claims (4)

A pair of elevation plates serving as the left and right side wall surfaces of the packaging box and a pair of plane plates serving as the upper wall surface and the bottom wall surface are alternately provided. Inner flap pieces are provided at both end edges of each elevation plate. In the wrap-around packaging box where the outer flap pieces are connected to both end edges respectively to become the end wall surface,
Forming a buckling induction frame line consisting of a ruled frame of a substantially rectangular frame formed in a straight line or a curve in parallel along the outer peripheral edge of the elevation plate with the center at the center of the elevation plate as a center. It is provided with auxiliary guide lines for ruled lines extending from each corner portion of the outer peripheral edge of the elevation plate to each corner portion of the buckling guide frame line adjacent thereto,
A packaging box, characterized in that the opening cut-off portion is provided in an elongated hole formed by an inner flap piece and a pair of outer flap pieces closing up and down.   The buckling guide frame line is a rectangle or square that is spaced inward from the four sides of the outer peripheral edge of the elevation plate at approximately equal intervals, and the corner portion is formed by a ruled line that is formed at a right angle or an arc shape. The packaging box according to claim 1, wherein the packaging box is characterized.   The packaging box according to claim 2, wherein the buckling guide frame line has a corner portion formed on a diagonal line of the elevation plate, and the auxiliary guide line extends along the diagonal line.   The packaging box according to claim 1 or 3, wherein the auxiliary guide line is in contact with a corner portion of the buckling guide frame line or extends to a position near the corner portion.

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