JP6411241B2 - Corrugated zipper for breaking - Google Patents

Description

  The present invention relates to a cardboard breaking zipper provided on a peripheral wall or the like of a cardboard box in order to facilitate an opening operation of the cardboard box.

  In a packaging box assembled by bending and bonding corrugated cardboard, zipper is formed on the side wall plate so that it can be easily unpacked without peeling off the bonded portion (for example, see Patent Document 1 below).

  This type of zipper consists of two breakable lines extending in parallel with a predetermined width, and by holding the break start portion formed at the end of the zipper and pulling it in the break direction, the side wall plate of the packaging box Can be unpacked by tearing into a strip.

  As shown in FIG. 4, the two breakable lines 11 constituting the zipper 10 are formed by a plurality of unit cuts 12 arranged at predetermined intervals along the breaking direction. Each unit cut 12 includes a first cut portion 12a that extends in parallel with each other that constitutes the two breakable lines 11, and a second cut portion 12b that extends in an inclined direction in the direction of crossing each other. The first cut portion 12a and the second cut portion 12b of the unit cut 12 are continuous with each other. The unit cut 12 breaks in the direction from the second cut portion 12b to the first cut portion 12a.

  In this type of zipper, a band-shaped cut piece that is broken along the two breakable lines 11 is formed by picking the break start portion and pulling it outward. At this time, when the pulling direction of the strip-shaped separating piece is biased to one of the breakable lines during the zipper breaking operation, a breaking force is applied in a direction intersecting the one breakable line. For this reason, after the zipper breaks, a portion where the surface layer of the surface liner of the corrugated cardboard is largely peeled off is formed at the break edge along one breakable line, and the appearance is remarkably lowered.

  Therefore, in order to suppress the surface layer peeling of the cardboard, as shown in FIG. 5, the third cut extending from the boundary 12y between the first cut portion 12a and the second cut portion 12b toward the outer side between the two breakable lines 11. A zipper having a unit cut 12 provided with a portion 12c has been proposed (see Patent Document 2).

JP 2003-165533 A JP 2004-26178 A

  However, when one end of the third cut portion 12c intersects the boundary 12y between the first cut portion 12a and the second cut portion 12b, the first cut portion 12a and the second cut portion weakened by the third cut portion 12c. The vicinity of the boundary 12y with 12b is easily bent. For this reason, at the time of the breaking operation, the belt-like separating piece is greatly raised in the pulling direction at the interval between the adjacent unit cuts 12, and the surface layer of the surface liner is largely peeled off, so that the appearance deterioration cannot be sufficiently suppressed.

  In view of the above points, an object of the present invention is to provide a corrugated cardboard breaking zipper that can sufficiently suppress the occurrence of surface layer peeling of the corrugated cardboard surface liner and can prevent the appearance of the breaking edge from being deteriorated. To do.

  In order to achieve such an object, the present invention comprises two ruptureable lines provided along the rupture position of the corrugated cardboard, and when the direction of tearing the corrugated cardboard between the two ruptureable lines into a strip shape is the rupture direction, In the corrugated cardboard breaking zipper in which each breakable line is formed by a plurality of unit cuts arranged at predetermined intervals along the breaking direction, the unit cuts extend along the breaking direction. A second cut portion that extends while inclining toward the first cut portion from a center side between both breakable lines, and has a terminal end that is continuous with a start end of the break direction of the first cut portion, and the first cut portion A third cut portion extending in a direction separating one end from the breakable line and having one end intersecting the cut portion, and the one end of the third cut portion is a boundary between the first cut portion and the second cut portion A predetermined distance from the first cut Than the center in the longitudinal direction, characterized in that intersects the first incisions portion at a position where the second cut lines side.

  In the corrugated cardboard breaking zipper according to the present invention, when the unit cut has a third cut part, when the cardboard is broken along two breakable lines, the progress of the peeling of the surface layer of the surface liner is made by the third cut. It can be stopped by the part. At this time, in the present invention, since the third cut portion is separated from the boundary between the first cut portion and the second cut portion and intersects the first cut portion, the first cut portion and the second cut portion The periphery of the boundary is difficult to bend. As a result, when tearing between two breakable lines in a strip shape, it is possible to suppress the rise of the gap between the unit cuts and to reduce the peeling of the surface layer of the front liner. Can be prevented.

  In the cardboard breaking zipper of the present invention, it is preferable that the third cut portion extends in a direction perpendicular to the breaking direction of both breakable lines. According to this, even if the total length of the third cut portion is relatively short, the progress of the peeling of the surface layer of the front liner can be stopped by the third cut portion, and the decrease in the strength of the cardboard by the third cut portion is minimized. can do.

  Further, in the corrugated cardboard breaking zipper according to the present invention, the first cut portion extends from the boundary with the second cut portion so as to gradually approach the center between both breakable lines. According to this, since the direction in which the breakage of the first cut portion proceeds is the direction approaching the center between both breakable lines, the surface layer of the surface liner is peeled from the end portion of the breakage direction of the first cut portion. Even so, the surface peeling proceeds toward the center between both breakable lines. Therefore, it can suppress that surface layer peeling of a surface liner advances to the outer side between both breakable lines.

The perspective view which shows a packaging box provided with the zipper for corrugated-cardboard fracture | rupture of this invention. Explanatory drawing which shows an example of the cardboard fracture zipper of this invention. Explanatory drawing which shows the other example of the zipper for cardboard fracture | rupture of this invention. Explanatory drawing which shows the conventional zipper for cardboard fracture | rupture. Explanatory drawing which shows the other conventional zipper for cardboard fracture | rupture.

  An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the corrugated cardboard breaking zipper 1 of the present embodiment is provided on a side wall 3 of a corrugated cardboard packaging box 2.

  As shown in FIG. 2, the zipper 1 is composed of two breakable lines 4, and both breakable lines 4 can be broken as shown in FIG. The line 4 is torn like a band. Thereby, the strip | belt-shaped cutting piece 5 is cut off from the side wall 3 of the packaging box 2, a fracture | rupture edge is formed, and the said side wall 3 is divided | segmented up and down.

  As shown in FIG. 2, the breakable line 4 is composed of a plurality of unit cuts 6 arranged at predetermined intervals. The unit cuts 6 constituting the upper and lower breakable lines 4 are formed vertically symmetrical.

  As shown in FIG. 2, each unit cut 6 includes a first cut portion 6a, a second cut portion 6b, and a third cut portion 6c. The first cut portion 6a extends in the same direction as the breaking direction, and the first cut portions 6a at the upper and lower positions are parallel to each other. The second cut portion 6b extends in the direction of breakage so as to incline away from the center between both breakable lines 4, and the end of the break direction is continuous with the start direction of the first cut portion 6a in the break direction. To do. The 3rd cut part 6c is extended in the direction which leaves | separates from both the breakable lines 4 (part used as the strip | belt-shaped separation piece 5).

  Furthermore, one end of the third cut portion 6c intersects the first cut portion 6a and continues to the first cut portion 6a. The position 6x where one end of the third cut portion 6c intersects the first cut portion 6a is at a predetermined distance from the boundary 6y between the first cut portion 6a and the second cut portion 6b, and the first cut portion 6a. It is the position which becomes the 2nd cut part 6b side rather than the center 6z of the longitudinal direction. As a result, one end of the third cut portion 6c is located away from the boundary 6y between the first cut portion 6a and the second cut portion 6b, so that the boundary 6y between the first cut portion 6a and the second cut portion 6b is the first. Since it is not weakened by the 3rd cut part 6c, and the swell of the part between the unit cuts 6 adjacent to each other is suppressed when the zipper 1 is broken, the effect of suppressing the occurrence of surface peeling of the surface liner is improved.

  The length of the third cut portion 6c is equal to the dimension from the boundary 6y between the first cut portion 6a and the second cut portion 6b to the position 6x where one end of the third cut portion 6c intersects the first cut portion 6a. Or more. Thereby, when the surface layer peeling of the surface liner of the corrugated cardboard (side wall 3 of the packaging box 2) occurs between the adjacent unit cuts 6 when the zipper 1 breaks, the surface layer peeling does not occur even if the third cut portion 6c is relatively short. Progress can be sufficiently suppressed by the third cut portion 6c.

  Furthermore, the third cut portion 6c extends in a direction perpendicular to the first cut portion 6a. According to this, the effect which the 3rd cut part 6c suppresses progress of surface layer peeling of a surface liner can be improved.

  In the above example, the first cut portion 6a of the unit cut 6 extends in the same direction as the breaking direction, and both the first cut portions 6a at the upper and lower positions are parallel to each other. As shown in FIG. 3, the first cut portion 6 a is inclined in a direction gradually approaching from the boundary 6 y with the second cut portion 6 b toward the center between the two breakable lines 4 (the portion that becomes the strip-shaped separation piece 5). It may be provided. According to this, since the progress direction of the breakage of the first cut portion 6a becomes a direction approaching the center between both breakable lines 4, even if the surface layer peeling of the surface liner occurs, both the surface layer peelings can be broken. The outward progress between the lines 4 can be suppressed.

  In addition, as shown in FIG. 3, even if the third cut portion 6 c does not extend at right angles to the first cut portion 6 a, the third cut portion 6 c is in the breaking direction of both breakable lines 4. If it is provided so as to extend in a direction that is a right angle, the effect of suppressing the progress of surface layer peeling is improved as in the embodiment shown in FIG.

  DESCRIPTION OF SYMBOLS 1 ... Corrugated cardboard breaking zipper, 2 ... Packaging box (cardboard), 4 ... Breakable line, 6 ... Unit cut, 6a ... 1st cut part, 6b ... 2nd cut part, 6c ... 3rd cut part.

Claims (3)

It consists of two breakable lines provided along the breaking position of the corrugated cardboard. When the direction of tearing the corrugated cardboard between the two breakable lines into a strip direction is the breaking direction, each breakable line is along the breaking direction. In the zipper for breaking the cardboard formed by a plurality of unit cuts arranged at a predetermined interval,
The unit cut extends from the center side between both breakable lines to the first cut portion extending along the breaking direction, and the terminal cut extends toward the first cut portion, and the terminal end is the breaking direction of the first cut portion. A second cut portion that is continuous with the start end of the first cut portion, and a third cut portion that extends in a direction away from both breakable lines with one end intersecting the first cut portion,
The one end of the third cut portion has a predetermined distance from the boundary between the first cut portion and the second cut portion, and is closer to the second cut portion side than the center in the longitudinal direction of the first cut portion. A corrugated cardboard breaking zipper that crosses the first cut portion at a position where   The corrugated cardboard breaking zipper according to claim 1, wherein the third cut portion extends in a direction perpendicular to the breaking direction of both breakable lines.   3. The corrugated cardboard breaking zipper according to claim 1, wherein the first cut portion extends at an inclination from a boundary with the second cut portion so as to gradually approach a center between both breakable lines.

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