JP2002321732A - Structure for break portion of corrugated fiberboard box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure for a break portion of a corrugated fiberboard box which can be securely broken without reducing the strength of the corrugated fiberboard box and which can provide a breakage with a satisfactory appearance. SOLUTION: In this structure for break portion of a corrugated fiberboard box 1 composed by attaching a cut tape 8 on a back liner along a breaking direction, a front liner in a region between a starting end and terminating end of the breaking of the cut tape 8, includes cuts 11 and 14 which are extended in a direction crossing a breaking direction and one ends of which abut on a breaking position by the cut tape 8 or are positioned adjacent to the breaking position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a breakable structure which is broken when a cardboard box is opened or divided.

[0002]

2. Description of the Related Art Conventionally, there is known a cardboard box in which a cut tape adhered to a back liner of a cardboard box forming the box is broken and opened by pulling a cut tape (for example, Japanese Patent Laid-Open Publication No. No. 9-165026). By providing the cut tape, a part of the corrugated cardboard is cut along with the cut tape in a strip shape along the breaking direction, so that opening and the like can be reliably performed.

However, when the cardboard is broken by the cut tape, the breaking force applied to the back liner of the cardboard via the cut tape is apt to be dispersed to reach the front liner through the stepped core. May come off from the core in a shape that gradually widens in the breaking direction. When such a peeling of the front liner occurs, the core is exposed in a relatively wide area around the broken portion, and there is a disadvantage that the box after the break becomes extremely ugly in appearance.

[0004] Further, as a breakable portion structure that can be broken without using the cut tape, a pair of parallel perforated lines or a strip-shaped breakable line called a zipper is extended in the breaking direction. (Eg, Japanese Utility Model 5)
-35630 gazette). The breakable line allows the back liner and the front liner to break evenly, and the break can be performed with almost no peeling of the front liner at the cut edge.

However, since this kind of breakable line is formed by a cut that penetrates the corrugated cardboard from the front and back, there is a disadvantage that the strength of the corrugated cardboard box is significantly reduced as compared with the case where the cut tape is provided.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a cardboard box which can be reliably broken without substantially lowering the strength of the cardboard box and which can be broken with a good appearance. It is an object of the present invention to provide a structure of a break portion.

[0007]

In order to achieve the above object, the present invention relates to a cut-off structure of a cardboard box, wherein a cut tape is attached to a back liner of a cardboard along a breaking direction. At least on the front liner of the corrugated cardboard in the area between the fracture start end and the fracture end end, extending in a direction intersecting the fracture direction by the cut tape, and having one end in contact with the fracture position or near the fracture position. It is characterized by having a cut to be made.

In the cardboard box of the present invention, by pulling the cut tape, the cardboard is continuously broken from the break start end to the break end end of the cut tape. At this time, when the back liner and the core of the corrugated cardboard to which the cut tape is attached are broken along the cut tape, the front liner is located at a position in the middle of the break between the break start end and the break end end. In some cases, the front liner peels off from the core and the peeled front liner gradually progresses toward the breaking direction while expanding. According to the present invention, the cut is provided in a region between a break start end and a break end end of the cut tape, and the cut is extended in a direction intersecting a break direction by the cut tape, The peeled portion of the front liner is separated through the cut, and the progress of peeling is stopped. At this time, since one end of the cut is in contact with or near the break position by the cut tape, the peeled portion of the front liner can be easily separated from the cardboard other than the break position, and the progress of peeling Can be reliably suppressed.

[0009] As a specific mode of the cut,
The cut is continuous from one end to the other end. Further, the discontinuity may be discontinuous, that is, a discontinuous discontinuity such as a perforation or a step discontinuity. In the case where the cut is formed continuously from one end to the other end, the separated portion of the front liner can be more reliably separated as compared with the case where the cut is discontinuous such as a perforation or a step cut. This makes it possible to reduce the exposure of the core by the front liner peeled off after breaking, and to maintain the appearance of the cardboard box after breaking well. Further, when the discontinuity is formed discontinuously like a perforation or a stepped discontinuity, by providing a discontinuous portion at an interval where separation of a peeled portion of the front liner can be smoothly performed, continuous from one end to the other end. The decrease in strength of the corrugated cardboard can be made smaller than that at the cut.

Further, by providing the cut only in the front liner, the strength of the cardboard can be reduced less than in the case where the cut is provided so as to penetrate from the front liner to the back liner.

Further, in the present invention, a plurality of the cuts are provided at predetermined intervals along a breaking direction of the cut tape. Thus, before the spread of the front liner peeling due to the breakage by the cut tape becomes large, it is suppressed at a plurality of locations with each cut, and the appearance of the corrugated cardboard box after the breakage can be maintained well.

Further, the cardboard box employing the present invention is broken through the cut tape provided on the entire circumference at a predetermined position on the peripheral wall, so that a substantially upper half is removed and a substantially lower half is removed. In the case of a tray forming box formed in a tray shape, it is preferable that the cut is provided only on a peripheral wall of a substantially lower half portion formed in a tray shape.

In this type of tray forming box, a substantially lower half is used as a tray for displaying an article to be packaged, and a substantially upper half is removed as an unnecessary part after being broken. Therefore, it is not necessary to prevent the front liner from being peeled off from the substantially upper half when the cut tape is broken. Therefore, by providing the cut only in the substantially lower half portion formed in a tray shape, the appearance of the substantially lower half portion when used for display of an article to be packaged or the like after breaking can be favorably maintained, As compared with the case where cuts are provided on both sides of the substantially upper half portion and the substantially lower half portion, reduction in box strength (pressure resistance of the side wall) can be reduced.

In the cardboard box adopting the present invention, a plurality of adjacently arranged small boxes are integrally connected by a single connecting plate, and are provided along the boundaries of the respective small boxes of the connecting plate. In the case of a small box that can be divided into small boxes by breaking the connecting plate through the cut tape, it is preferable that the cuts are provided on both sides of the cut position of the connecting plate with the cut tape. .

[0015] The small box is divided into a plurality of small boxes in an unopened state by breaking the connecting plate.
When the connection plate is broken, the spread of the peeling of the front liner due to the break by the cut tape is suppressed by the cuts provided on both sides of the break position. Thereby, in the connecting plate that seals the small box for each small box, the exposure of the center core by the front liner peeled after the break is small, and the appearance of the small box after the break is maintained well. be able to. Moreover, since the cut is provided only in a predetermined breaking area of the connecting plate, the strength of the connecting plate is not reduced as compared with a case where a perforation or a zipper or the like for breaking is provided. Inadvertent division of the small box can be reliably prevented.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG. 1A is an explanatory perspective view showing the appearance of the cardboard box of the present embodiment, FIG. 1B is an exploded perspective view showing the configuration of the cardboard box of the present embodiment, and FIG. Explanatory perspective view showing a state, FIG. 3 is an enlarged view showing a part of a connecting plate, FIG. 4 is an explanatory perspective view showing a tray forming state of a small box, and FIG. 5 is a part of a side wall of the small box. It is explanatory drawing which expands and shows.

As shown in FIG. 1A, a cardboard box 1 according to the present embodiment is a so-called small box in which a plurality of small boxes 2 are connected by a single connecting top plate (connecting plate) 3. Each small box 2
As shown in FIG. 1 (b), is formed in a rectangular tube with a bottom and an open top, and is arranged with one side wall 4 adjacent to each other. Further, the connection top plate 3 includes a cover plate portion 5 for closing an open upper portion of each small box 2, and a pair of connection pieces 6 vertically bent downward from both side edges of the cover plate portion 5.
And is constituted by. Both connecting pieces 6 are shown in FIG.
As shown in FIG. 6, the small boxes 2 are bonded to a pair of opposed side walls 7 of the small boxes 2 with an adhesive, and connect the two small boxes 2 integrally.

A band-shaped cut tape 8 is adhered to the back side of the connecting top plate 3 corresponding to the boundary between the two small boxes 2, thereby forming a first break 9 along the cut tape 8. Have been. Further, the cover plate portion 5 has an H-shaped cut portion 10 cut through the front and back at a center position of the first break portion 9.
Is formed, and the breakage by the cut tape 8 can be started using the H-shaped cut portion 10 as a clue.
That is, the H-shaped cut portion 10 is a break start end of the cut tape 8, and the edge of the connecting piece 6 is a break end end of the cut tape 8. Further, between the H-shaped cut portion 10 and both end edges of the lid plate portion 5 (between the break start end and the break end end of the cut tape 8), the first portion extending to both sides of the first break portion 9 by the cut tape 8 is formed. A first cut 11 is formed. The first cut 1
Reference numeral 1 is formed only on the front liner of the cover plate portion 5, and is provided so that one end thereof is in contact with the first break portion 9 formed by the cut tape 8. In the first break portion 9 of the present embodiment, a zipper 12 for guiding the break by the cut tape 8 is formed from the first cut 11 to the vicinity of the leading edge of the connecting piece 6. The zipper 12 is formed by a discontinuous cut that penetrates the front and back, but by providing the zipper 12 only in a part of the first break portion 9, the strength of the connecting top plate 3 along the first break portion 9 is prevented from being reduced. Have been.

Each of the small boxes 2 is provided with a band-shaped cut tape 8 around the entire back surface substantially at the center of the four side walls 4 and 7 in the height direction.
Are continuously adhered, whereby a second break portion 13 is formed along the cut tape 8. Furthermore, each small box 2
A pair of side walls 4 facing each other in the arrangement direction are formed with an H-shaped cut portion 10 that cuts through the front and back at an intermediate position of the second break portion 13 to divide the cut tape 8, Breaking by the cut tape 8 can be started using the part 10 as a clue. In this case, the H-shaped cut portion 10 provided on one side wall 4 becomes a break start end of the cut tape 8, and the H-shaped cut portion 10 provided on the other side wall 4 becomes a break end end of the cut tape 8. By providing the second break portion 13, each small box 2 can be vertically divided through the second break portion 13, and the lower half portion is used as a tray for display of an article to be packaged or the like. It is a so-called tray forming box to be used.

A plurality of second cuts 14 extending downward from the second break portions 13 by the cut tape 8 are formed at a predetermined interval on a pair of side walls 7 which are orthogonal to each other in the arrangement direction of the small boxes 2. Is formed. The second cut 14
Is formed only on the front liner of the side wall 7, and is provided so that one end thereof is in contact with the second break portion 13 formed by the cut tape 8. In this embodiment, a zipper 15 is formed to guide the breakage by the cut tape 8 along the second break portion 13 of the side wall 4 provided with the H-shaped cut portion 10. The zipper 15 is formed by a discontinuous cut that penetrates the front and back sides.
By providing only on the side wall 4 where 0 is provided, a decrease in the strength of the side wall 7 along the second break portion 13 is prevented.

The cardboard box 1 having the above structure is divided into a pair of small boxes 2 as follows. As shown in FIG. 2, first, the H-shaped cut portion 10 is gripped and the cut tape 8 is cut.
By pulling up, the breaking by the cut tape 8 is started along the first breaking portion 9. At this time, FIG.
As shown in (2), the cut liner 8 is adhered to the back liner x on the back surface side of the connection top plate 3, so that the front liner z is broken from the back liner x through the core y. However, in the front liner z, since the breaking force applied from the cut tape 8 is easily dispersed, it is difficult to break along the cut tape 8 and may come off from the core y.
Here, the peeled front liner z is the first cut 1
1 stops the peeling. That is, when the peeled front liner z reaches the first cut 11, only the part peeled off by the first cut 11 is removed from the core y. In this way, before the peeled front liner z greatly spreads,
Since the degree of exposure of the core y is relatively small due to the suppression by the first cuts 11, the broken top panel 3 can be maintained in a good appearance. Then, as shown in FIG.
Further, when the cut tape 8 is pulled, the rupture advances along the zipper 12 and is divided into a pair of small boxes 2.

The small box 2 thus divided is formed in a tray shape as follows. As shown in FIG.
By holding the H-shaped cut portion 10 and pulling the cut tape 8 in the outward direction, breakage by the cut tape 8 is started along the second break portion 13. In the side wall 4 where the H-shaped cut portion 10 is provided, the zipper 15
Is provided, the breakage proceeds smoothly. Subsequently, breakage by the cut tape 8 causes the connection piece 6 to break.
Is advanced to the side plate 7 to which the
Only breaks. At this time, as shown in FIG. 5, when the front liner z comes off, the progress of the peeling of the front liner z is stopped by the second cut 14. That is, when the peeled front liner z reaches the second cut 14, only the part peeled off by the second cut 14 is the core y
Removed from Further, in the case where the break is performed only by the cut tape 8 over a relatively long distance, the plurality of second cuts 14 are provided, so that the peeling of the front liner z can be suppressed while being extremely small. Can be. As a result, the degree of exposure of the core y becomes relatively small, so that it can be broken and the tray-like substantially lower half can be maintained in good appearance. Moreover, the second break 14
Is provided only in the substantially lower half part, the strength of the side plate can be sufficiently maintained. In the case of the present embodiment, on the side wall 7 to which the connecting piece 6 is adhered, the breaking of the front liner z is guided by the suppression of the line edge of the connecting piece 6, and the peeling of the front liner z occurs. Absent.

The second cut 14 is not limited to the small box 2 of the present embodiment, but can be provided on the side wall of another tray forming box (not shown). It can be provided only in the substantially lower half where the tray is formed to prevent a reduction in strength.

The first cut 11 and the second cut 14 in the present embodiment are formed on the front liner to obtain the effect of preventing the front liner from peeling as described above. Sometimes, the first cut 11 and the second cut 14 are formed not only on the front liner but also on the back liner. Also in this case, it is needless to say that the effect of preventing the front liner from being peeled off by the first cut 11 and the second cut 14 is not hindered.

In this embodiment, the case where the first cut 11 and the second cut 14 are formed continuously from one end to the other end has been described.
Although not shown, the first cut 11 and the second cut 14 may be formed discontinuously, such as perforations or uneven cuts. In this case, by forming the first cuts 11 and the second cuts 14 discontinuously to such an extent that the effect of preventing peeling is not hindered, a decrease in the strength of the cardboard can be reduced.

[Brief description of the drawings]

FIG. 1A is an explanatory perspective view showing an external appearance of a cardboard box according to an embodiment of the present invention, and FIG. 1B is an explanatory exploded perspective view showing its configuration.

FIG. 2 is an explanatory perspective view showing a subdivided state of the cardboard box.

FIG. 3 is an explanatory diagram showing a part of a connecting plate in an enlarged manner.

FIG. 4 is an explanatory perspective view showing a tray forming state of a small box.

FIG. 5 is an explanatory diagram showing a part of a side wall in an enlarged manner.

[Explanation of Signs] 1 ... cardboard box, 2 ... small box, 3 ... connecting top plate (connecting plate),
8 ... cut tape, 9 ... first break part (break part), 11,
14 ... cut, 13 ... 2nd break part (break part), x ... back liner, z ... front liner.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E060 AA03 AC03 BA01 BA14 BA22 BC02 CE03 CE07 CE18 CE23 DA04

Claims (4)

[Claims] 1. A broken part structure of a cardboard box in which a cut tape is adhered to a back liner of a cardboard along a breaking direction, wherein the cut tape has a cardboard box in an area between a break start end and a break end end. A broken portion structure of a corrugated cardboard box, characterized in that at least a front liner is provided with a cut extending in a direction intersecting a direction of rupture by the cut tape and having one end in contact with the rupture position or located near the rupture position. 2. The broken portion structure of a cardboard box according to claim 1, wherein a plurality of said cuts are provided at predetermined intervals along a breaking direction of said cut tape. 3. The cardboard box is broken through the cut tape provided at a predetermined position of the peripheral wall on the entire periphery, whereby a substantially upper half is removed and a substantially lower half is formed in a tray shape. The broken part structure of a cardboard box according to claim 1 or 2, wherein the cut is provided only on a peripheral wall of a substantially lower half part formed in a tray shape. 4. The cardboard box, wherein a plurality of small boxes arranged adjacent to each other are integrally connected by a single connecting plate, and the cut tape provided along a boundary of each small box of the connecting plate. 2. A subdivision box which can be divided into small boxes by breaking said connecting plate, wherein said cuts are provided on both sides of a position where said connecting plate is cut by cut tape. Or the fracture | rupture part structure of the cardboard box of 3.