JP2010030628A - Carton with line to be fractured - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a carton with lines to be fractured having a shape capable of performing a predetermined opening even when there exist an individual difference by a user and a change in the opening direction caused by changing a holding condition of the carton when the lines to be fractured of the carton are opened. <P>SOLUTION: On the carton, the lines to be fractured composed of cut lines intermittently arranged at predetermined sites of the carton made of a paperboard are provided, and a predetermined region of the carton is opened by tearing the lines to be fractured. In the carton with the lines to be fractured, the lines to be fractured consists of a straight line base part cuts respectively close or adjacent in parallel and oblique line branch part cuts linearly extending respectively symmetrically to the opposing side from one end part on the same side of the parallel straight line base part cuts, and approximately Y-shaped formed cut parts consist of intermittently arranged cut lines on the extending part of the parallel straight lines, and opening of predetermined lines to be fractured is possible. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a paper box for storing snacks and foods. More specifically, the present invention relates to a carton with a planned break line formed in a rectangular parallelepiped shape from a single blank plate, and more specifically, a carton having a novel planned break line structure. About.

Conventionally, in a so-called sealed end carton in which a paper box having a folding cylindrical structure called a carton is used, and both ends of a cylindrical body are glued and closed in a so-called sealed end carton. When opening the trunk, it is assumed to be a rupture scheduled part by drilling a cutting blade structure part that is interrupted in advance in a predetermined part of the paper box, and in use, the rupture scheduled part is broken and opened. As the cutting blade structure portion, a zipper band opening structure with a perforated line structure with an intermittent cutting blade or a planned breaking line structure with a cutting edge with its tip bent into a bowl shape is often used. 6 is an explanatory view of a carton having a conventional zipper strip opening structure, and an intermittent row of scissors cut across the upper part of the front plate 102 of the cylindrical trunk forming the carton H in parallel. , J ′ and a zipper strip 114 formed between the upper side of both ends of the zipper strip 114 and the left and right side plates 101 and 103 (not shown in the figure) obliquely crossing each other. After opening the zipper strip 114, a carton lid portion formed by opening the broken perforations N, N is provided on the back plate connecting both ends of the broken perforations N, N. A carton having a structure that opens and closes in a vertical manner with a hinge portion formed by a broken line as a fulcrum is shown, and a saddle-like cut row J, J constituting a zipper belt portion 114 that crosses the front plate 102 in parallel in the carton H 'Is composed of parallel linear base cutting blades and diagonally branched branch cutting blades whose ends on the opening start side of each of the linear base cutting blades are bent in a hook shape toward the inside of the parallel line. Yes.
Carton punching dies usually engrave grooves on a 18mm thick board (laminated plywood) with laser light output according to the carton blank drawing or according to the digital data of the carton blank figure, and then cut or fold the carton Is manufactured by embedding a 0.7 mm thick, 23.6 mm wide strip-shaped steel sheet cut into a predetermined dimension and bent so as to form one end.
For carton punching, a punching die and a face plate facing it (attaching a press board on a metal plate to make a female die for the punching die) are attached to a punching machine, and a paperboard is inserted between them. After that, punching is performed by applying instantaneous pressure processing (processing such as half cutting and ruled pressing is performed simultaneously with die cutting). The punching machine is generally divided into a flat pressure type and a rotary type. The rotary type uses a punching die and a female die that are machined into a cylinder shape, and has a feature that the die life is long and the punching accuracy is high. Because it is extremely expensive, it is used for limited production of long runs. On the other hand, the flat pressure type is used for general purposes.

The opening operation of the zipper strip 114 of the carton H shown in FIG. 6, that is, the strip-shaped portion formed between the parallel scissors cut rows J and J ′, is performed by pinching the tabs provided at the corners of the carton, If the zipper line (scheduled opening direction) is moved in the extending direction of the linear base cutting blades of the ridge-like cut lines J and J ′ crossing the front plate 102, the zipper belt portion of the zipper belt portion is opened after the linear base cutting blade is opened. By the pulling operation, tearing breaks inward from the respective straight portions are generated by the inward force of the zipper strip from the end of the straight portion parallel to the force in the moving direction, and then disposed. Reach the diagonal branch cutting edge of each bowl-shaped cutting edge. By the continuation of this operation, the joint portion of the bowl-shaped cutting blade portion that forms the zipper band portion is broken, and the opening operation is performed. However, if the opening direction is deflected due to the state of holding the carton, etc., or due to individual differences in the operation method, the zipper line breakage due to the above operation is not performed correctly, and at the tearing part from the end of the straight line part to the shaded part Detachment from the zipper line, breakage progresses in areas other than the planned breakage, for example, causing delamination and peeling off the printed part around the zipper belt, damaging the aesthetics, or damaging the necessary display area. There was a concern that the zipper belt would be broken.
Also, the zipper line indicates the direction of the paper in the carton (the direction of paper fibers formed when paperboard used in the carton, such as coated cardboard, is made, and the paper such as paperboard tears in the direction of the paper. In contrast, when it is inclined obliquely or when a curved line is drawn, the used paperboard tends to break in the direction of the paper that is easy to tear. It was easy to occur. In the case of a coated ball having a basis weight of 160 g / m ² or more that is normally used for a carton, since 5-6 layers of paperboard are made at the time of paperboard making, the tear from the place where the zipper line is removed. Delamination tends to spread.

In order to solve the above problem, a carton has been proposed in which the cutting edge shape of the planned break line is formed in a Y shape and the opening region can be opened according to the zipper line (for example, Patent Document 1). That is, in what was shown by patent document 1, the shape received in the oblique line part of the bowl-shaped cutting blade part by which the fracture | rupture by the tear from the linear part of a zipper line was arrange | positioned conventionally is on the extension line of a linear part. By receiving in the two diagonal lines that are opened symmetrically and have a substantially V shape, even if the opening direction is deflected, it can be received in either of the two diagonal lines that have a substantially V shape, forming a V shape. The rupture is continued at the straight line portion that is continuous with both shaded portions.
Japanese Patent Laid-Open No. 10-218167

In the carton according to the invention described in Patent Document 1, the punching die for the Y-shaped planned break line is a continuous strip-shaped punching having a bowl-shaped cutting edge on one side, similar to the conventional bowl-shaped fracture planned line Both the blade and the continuous strip-shaped punching blade having a short cutting blade corresponding to one diagonal portion of the Y shape on one side, the cutting blade portion of both punching blades with the strip-shaped portion parallel and with a predetermined interval Embedded in the base plate so as to form a Y-shape according to the above.
Among the above punching dies, those that form a short cutting edge corresponding to one of the Y-shaped hatched portions are durable to those that embed a cutting blade with only the hatched portions as in the prior art. However, it takes a long time to leave the short cutting edge part and delete it to prevent the other cutting edge part from popping out. However, there is a problem in economic efficiency in that the cost increases. Furthermore, since the short hatched portion cutting blade formed by the punching die is not integrally continuous with the straight portion of the cutting blade formed by the other punching die, the cutting blade is changed over time by continuous punching processing. Since the partial movement is likely to occur due to the bending of the zipper line, there is a possibility that the break to the zipper line may not be continued, and there is a problem that it takes time to adjust the partial movement or the like.
In view of the above, there is a demand for a carton with a planned fracture line that is made of a punching die that can shorten the machining time and the adjustment time due to its excellent workability and that does not impair continuous breakage to the zipper line.

  Accordingly, an object of the present invention is to solve the above-described problem, and when opening the planned breaking line of the carton, the zipper line caused by the individual difference by the user or the change in the holding state of the carton is removed. An object of the present invention is to provide a carton with a planned breaking line having a shape that can be opened according to a predetermined breaking planned line even when the opening direction changes.

  In order to solve the above-mentioned problem, the invention described in claim 1 is to drill a planned break line formed by a row of cuts arranged intermittently at a predetermined portion of the carton, and to tear the broken break line to break the carton. A carton for opening a predetermined area, and each of the straight base cuts parallel to each other in close proximity or close to each other and bent linearly from one end of the parallel straight base cuts to the opposite sides of each other The substantially Y-shaped cut portion formed by the extended oblique branch cut is a cut row that is intermittently arranged on the extension of the parallel straight base cut. A carton with a line to break. By constructing in this way, conventionally, when manufacturing a punching blade and a punching die, a processing time and an adjustment time are required. In order to reduce the cost by shortening the machining time and adjustment time, in applying to a carton, the oblique branch cuts that have received the breaking from the end of the cut row are continuously straight base cuts. Therefore, it is possible to open at a predetermined planned fracture line without causing problems such as delamination due to deviation at the discontinuous portion.

  The invention according to claim 2 is arranged in a predetermined part of the carton, arranged on the start side in the opening direction of the oblique branch cut of the cut part, and arranged on the terminal side in the opening direction of the linear base part cut, The carton with a planned break line according to claim 1, wherein the cut line is provided, and the planned break line consisting of a substantially Y-shaped cut line with good workability is as described above. By doing, it can be set as the shape of the expected break line from the opening part more excellent in opening property.

  The invention according to claim 3 is the carton with a planned breaking line according to claim 2, wherein the cut portions are arranged in a straight line at a predetermined part of the carton, and the cut line is provided in a straight line. By comprising in this way, it can open easily by the continuous fracture | rupture in a linear opening site | part.

  The invention according to claim 4 is a carton with a planned breaking line according to claim 2, wherein the cut portions are arranged in a curved line at a predetermined portion of the carton, and the cut line is provided in a curved shape. By comprising in this way, it can open easily by the continuous fracture | rupture in a curvilinear opening site | part.

  In the invention according to claim 5, the angle formed by the straight base cut and the oblique branch cut extending linearly from one end of the straight base cut is 95 ° to 165 °. 5. A carton with a planned fracture line according to any one of claims 1 to 4, wherein the linear base cuts in parallel and the one end on the same side of the parallel straight base cuts are respectively extended to opposite sides. At least a substantially Y-shape is formed by the oblique branch cut, and the continuous break from the other end of the straight base cut can be received.

  Invention of Claim 6 is a zipper belt | band | zone part comprised by the strip | belt shape which the said notch row | line | column consists of two strips parallel at predetermined intervals, It is described in any one of Claims 1-5 characterized by the above-mentioned. By configuring in this manner with a carton with a planned breaking line, it is possible to easily cause a band-like continuous breaking in the opening direction by the zipper band portion.

  According to a seventh aspect of the present invention, each of the punching blades forming the substantially Y-shaped cut portion is formed of a single-cut blade, and there is no cutting edge of the single-cut blade at the parallel base cut portion. The carton with a planned breaking line according to any one of claims 1 to 6, characterized in that the surfaces are brought into close contact with each other. The diagonal branch cut continues continuously to the straight base cut, and does not cause problems such as delamination due to deviation at the discontinuous portion, and can be opened at a predetermined planned breaking line. In addition, there is no occurrence of delamination or the like due to the gap between the close linear base cutting edges, and the appearance is not impaired.

  In the carton with a planned fracture line of the present invention, the planned fracture line is linearly extended from the adjacent linear base cuts and the opposite ends of the parallel linear base cuts to the symmetrically opposite sides. It is composed of an oblique line branch cut that extends, and by forming a substantially Y shape, the break opening from the opening start side is received by the Y-shaped oblique branch cut and then disposed. The punching blade can easily propagate the opening to the substantially Y-shaped cut portion and eliminates the need for processing for forming the step portion, which was necessary for manufacturing the conventional Y-shaped punching blade. In addition, the punching die can be easily manufactured and processed, and there are economical effects such as cost reduction by shortening the processing time and adjustment time.

  Since the parallel linear base cut formed in a substantially Y shape and the oblique branch cut extending linearly from one end of the linear base cut are each integrally formed, One oblique line cut of the planned fracture line consisting of a cut line formed from a Y-shape is not formed integrally with the straight base cut, but is more durable. Along with the planned fracture line formed from the conventional Y-shaped cut line, the punched diagonal base cutting edge is partially moved or dropped due to bending of the cutting edge over time, etc. Therefore, there is an effect that the breakage is not discontinuous without being continuous with the linear base cutting edge.

  Further, the punching blades constituting the substantially Y-shaped cut line are respectively formed by using the punching blades of the single cutting blades and bringing the surfaces of the single cutting blades having no cutting edges into close contact with each other at the linear base cutting blade portion. Thus, there is no occurrence of delamination or the like in the gap between the close linear base cutting edges, and there is an effect that the appearance is not impaired.

  The present invention will be described in detail below with reference to the drawings. FIG. 1 is a developed plan view showing a blank state of an embodiment of a carton with a planned breaking line according to the present invention. FIG. 2A is an explanatory perspective view showing the assembled state of the embodiment. FIG.2 (b) is the perspective view for description which shows the display state after opening of an Example similarly. FIG. 3A is a plan view for explaining the structure of a conventional Y-shaped punching blade. FIG. 3B is a perspective view for explaining the structure of a conventional Y-shaped punching blade. FIG. 4A is a plan view for explaining the configuration of a substantially Y-shaped punching blade according to the present invention. FIG. 4B is an explanatory perspective view showing the configuration of a substantially Y-shaped punching blade according to the present invention. FIG. 4C is a plan view for explaining the cut formed by the substantially Y-shaped punching blade according to the present invention. Fig.5 (a) is a perspective view for description of another Example of the carton with a fracture line according to the present invention. (B) is the perspective view for description of another Example similarly. (C) is the perspective view for explanation of other examples similarly. FIG. 6 is a perspective view for explaining a carton using a zipper belt portion by a planned fracture line made of a conventional saddle-shaped cut line. FIG. 7A is an explanatory partial side view showing typical types and shapes of punching blades. (B) is an explanatory perspective view showing a configuration in which a single cutting edge is used in a substantially Y-shaped cut row according to the present invention.

  FIG. 1 is a developed plan view showing a blank state of an embodiment of a carton with a planned breaking line according to the present invention, and blanks P formed by punching a sheet material such as paperboard are folded lines L1, L2, L3, The sticking plate 5, the left side plate 1, the front plate 2, the right side plate 3, and the back plate 4 are connected in series through L4, and the top plate 6 is connected to the upper extension of the left side plate 1 via folding lines L5 and L6. The insertion plate 7 is arranged in order, and ear pieces 8 and 9 are extended on the upper extensions of the front plate 2 and the back plate 4 via fold lines L7 and L8, respectively. On the lower extensions of the front plate 2, the right side plate 3, and the back plate 4, bottom component plates 10, 11, 12, and 13 are extended through fold lines L9, L10, L11, and L12, respectively. In parallel with a predetermined distance from the lower end side of the front plate 2, zipper strips 14 are formed from the center toward the left and right side plates, respectively, by a planned breaking line composed of two ridge-like cut lines J and J ′. Further, the ridge-like cut lines J and J ′ forming the zipper strip 14 reach the left and right side plates 1 and 3 and are linear base cutting edges that are close to each other and inclined obliquely upward from the corners. Continuing to a substantially Y-shaped cut row K, K ′ consisting of diagonally branched cutting edges extending from opposite ends of the parallel linear base cutting blades to the opposite sides, the substantially Y-shaped cut row K Inclined zipper strips 15 and 15 formed with the oblique branch cutting edge as a starting end side between K ′ and K ′, respectively, are engraved to approximately the center of the upper end sides of the left side plate 1 and the right side plate 3. The fold line L5 on the upper side of the left side plate 1 has a cut line M between the intersections with the cut lines K and K ′, and a break perforation line N between the left end fold line L1 and the bottom component plate 10, Adhesive pieces 10 ′ and 12 ′ are extended from the right end corners of 12 via folding lines L13 and L14, respectively. Further, at the time of exhibition after opening, which will be described later, the ear piece 9 extending on the upper portion of the back plate 4 may be cut off with the fold line L8 as the broken perforation line.

  FIG. 2A is an explanatory perspective view showing an assembled state of the embodiment of the carton with a planned breaking line according to the present invention, in which the bottom component plates 10, 11, 12, 13 are preliminarily connected to the folding lines L9, L10, L11, L12. And folding the folding lines L13 and L14 and sticking the sticking pieces 10 'and 12' to the bottom constituting plates 11 and 13, and then folding the folding lines L2 and L4 to make the back plate 4 and the sticking board 5 The carton that is stuck and flattened is erected, filled with the contents, and then the top plate 6 is put on, and the insertion plate 7 is inserted, and the assembled state is shown. By the way, Carton Q usually collects and packs small cartons and bags that store confectionery, miscellaneous goods, etc. in multiples (for example, dozen units or 10 units) corresponding to retail, and also for transportation and transportation in small lots. This is an exhibition and transport carton that can be used, opened at the store, and displayed.

  When opening the carton Q, first, a zipper band is formed by a planned fracture line composed of conventional scissors cut lines J and J ′ which are engraved on the upper portion at a predetermined distance from the lower end side of the front plate 2 and opened from the center. The upper end of the left and right side plates 1 and 3 is formed by tearing the portion 14 in the left-right direction and continuously forming the inclined zipper strips 15, 15 formed between the substantially Y-shaped cut rows K, K ′ according to the present invention. Next, by breaking through the cut line M, the broken perforated line N, and the broken perforated line L8 engraved on the upper end side of the left side plate 1, the upper portion of the front plate 2 and the left and right side plates 1, 3 are cut. The front part, the top plate 6 and the ear piece 9 are removed, and in FIG. 2 (b), the packaged article as the contents is opened in a substantially tray-like displayable state which is exposed from the front in a visible state.

The belt-shaped inclined zipper strips 15 and 15 carved on the left and right side plates 1 and 3 are formed between substantially Y-shaped cut rows K and K ′ disposed at predetermined intervals, respectively. Opening direction, that is, continuous from zipper strips 14 and 14 made of conventional scissors-like cut lines J and J 'engraved on the front plate, and inclined obliquely upward from the vicinity of the lower ends of the left and right side plates 1 and 3, respectively. And it is engraved up to the approximate center of the upper edge. In the left side plate 1, the opening direction is a diagonally upward left direction from the vicinity of the lower end of the corner portion, and in the right side plane plate 3, it is a diagonally upward direction from the vicinity of the bottom end of the corner portion. The paper grain direction of the paperboard is perpendicular to the vertical fold line forming the carton body, that is, the fold lines L1, L2, L3, and L4 in the embodiment. It has become. For this reason, when opening the inclined zipper strips 15, 15, there is a tendency to be relatively easily oriented in the horizontal direction with respect to the opening direction, and the components of the cut row will be described later, for example, engraved on the left side plate 1. In the substantially Y-shaped cut rows K and K ′ that form the inclined zipper strip 15 between them, even if the direction of the shear stress acting on the end of the straight base cut is horizontal in the cut row K on the upper side, Since the slanted branch part cut inside the zipper strip is located at the position where it is received, the shear will propagate to the next cut. Similarly, in the cut line K ′ on the lower side, even if the direction of the shearing stress acting on the end of the straight base cut is horizontal, the slanted branch cut on the outer side of the zipper strip is present at the position where it is received. Therefore, the shear will propagate to the next cut. This effect is the same in the right side plate 3 and does not cause problems such as paper peeling from the middle part of the zipper belt part and tearing of the zipper belt part.
In the carton of this embodiment, the carton is formed with a zipper belt portion engraved across the side plates constituting the body portion with an inclination of approximately 45 degrees upward. For example, it may be a zipper belt portion having a gentle inclination angle across the side plate constituting the body portion. Similarly, in the carton of the present embodiment, the opening method using the zipper band part from the front plate of the carton to both sides is not limited to this. For example, the zipper band part that interferes with the entire circumference of the trunk part The zipper belt part of the entire circumference can be opened in one direction from any of the body part constituting plates.

FIG. 3A is a plan view for explaining the structure of a conventional Y-shaped punching blade. FIG. 3B is an explanatory perspective view showing the configuration of a conventional Y-shaped punching blade, which is composed of a long punching blade B-1 and a similarly long punching blade B-2.
As shown in the lower part of the perspective view of FIG. 3B, the long punching blade B-1 is a straight base cutting blade C- formed on the long punching blade in the same direction as the longitudinal direction of the punching blade. 1 and an oblique branch cutting edge C-2 formed by bending the upper portion of the punching blade at a bent portion F in a predetermined direction with respect to the longitudinal direction of the punching blade while being connected to the linear base cutting blade. The configured bowl-shaped cutting edge portion is provided on the side edge of the punching blade at a predetermined pitch, and the other side edge is an embedded portion D-1 embedded in the punching die. In the plan view of FIG. 3 (a), a state is shown in which a diagonal branch cutting edge C-2 is bent at an angle of approximately 45 degrees to the left from the bent portion at the upper end of the linear base cutting edge C-1. ing.
As shown in the upper perspective view of FIG. 3B, the long punching blade B-2 is formed on the long punching blade in the same direction as the longitudinal direction of the punching blade. The upper portion of the punching blade is bent in a predetermined direction with respect to the longitudinal direction of the punching blade at one end of the stepped portion E-1 having a length substantially equal to the straight base cutting blade C-1 of FIG. The slanted branch cutting edge C-3 formed by bending at the same length as the slanting branch cutting edge C-2 of the long punching blade B-1 and at the same pitch It is provided on the side edge, and the other side edge is an embedded portion D-2 embedded in the punching die. As shown in the plan view of FIG. 3 (a), the long punching blade B-2 is parallel to the long punching blade B-1 and on the left side from the bent portion at the lower end of the stepped portion E-1. The tip of the oblique branch cutting edge C-3 that is bent and formed at an angle of approximately 45 degrees is in a position where it comes into contact with the bent portion at the upper end of the straight base cutting edge C-1 of the long punching blade B-1. By being arranged, the oblique branch cutting edge C-2 connected to the linear base cutting edge C-1 constituting the bowl-shaped cutting edge formed from the long punching blade B-1, The Y-shaped cutting edge part which consists of the slanting branch part cutting edge C-3 formed from this punching blade B-2 is formed.
As described above, in manufacturing the long punching blade B-2, the stepped portion E-1 is formed so that the cutting blade portion does not contact the blank in the punching process in order to form the oblique branch cutting blade C-3. It is necessary to provide a machining step and a machining time for removing the cutting edge portion existing in the punching blade before machining.

4 (a) and 4 (b) show the configuration of the punching blade of the substantially Y-shaped cut line according to the present invention and the explanation for the configuration of the conventional Y-shaped punching blade. In the perspective view, it is composed of a long punching blade B-4 as well as a long punching blade B-1.
The configuration of the long punching blade B-1 is as described with reference to FIG. 3. However, the linear base cutting blade C formed on the long punching blade in the same direction as the longitudinal direction of the punching blade. -1 and an oblique branch cutting edge C-2 formed by bending the upper part of the punching blade at a bent portion F in a predetermined direction with respect to the longitudinal direction of the punching blade while being connected to the linear base cutting blade The configured bowl-shaped cutting blade portion is provided on one side of the punching blade at a predetermined pitch, and the other side is an embedded portion D-1 embedded in the punching die. In the plan view, a state is shown in which a diagonal branch cutting edge C-2 is bent at an angle of approximately 45 degrees to the left from the bent portion at the upper end of the linear base cutting edge C-1.
As shown in the upper part of the perspective view of FIG. 4B, the structure of the long punching blade B-4 is a linear base cutting blade formed on the long punching blade in the same direction as the longitudinal direction of the punching blade. C-5 and the upper part of the punching blade connected to the linear base cutting edge and in the direction opposite to the oblique branch cutting edge C-2 of the long punching blade B-1 with respect to the longitudinal direction of the punching blade A side edge of the punching blade is formed at a pitch equal to that of the long punching blade B-1 with a saddle-shaped cutting blade C-6 formed by bending a bent portion F at a bent portion F. The other side edge is an embedded portion D-4 embedded in the punching die. As shown in the plan view of FIG. 4 (a), the long punching blade B-1 and the long punching blade B-4 are arranged in parallel in close contact or very close to each other at the same pitch. Is a back-to-back saddle-shaped cutting edge formed by the straight base cutting edge C-1 and the oblique branch cutting edge C-2, and the linear base cutting edge C-5 and the oblique branch cutting edge C-6, respectively. A substantially Y-shaped punching blade is formed.
As described above, the structure of the punching blade composed of a substantially Y-shaped cut line for a carton according to the present invention is formed by machining a long punching blade, so that the punching die used is formed into a punching die. The embedded part is large, and even with a large amount of punching processing, the fixing of the punching blade is stable, and troubles such as dropout do not occur. In addition, even if the direction of the shear stress acting on the end of the straight base cut of the planned fracture line is horizontal, the shear is present at the position where the oblique branch cuts on both sides of the zipper band are received, so that the shear is the next cut. Therefore, opening to the cut portion to be disposed next can be easily propagated.

FIG. 4C is a plan view for explaining a substantially Y-shaped cut row according to the present invention, and the cut formed in the substantially Y-shape is a straight base cutting edge C− as described in the previous section. With a substantially Y-shaped punching blade by a back-to-back saddle-shaped cutting edge formed by 1 and a diagonal branch cutting edge C-2, a straight base cutting edge C-5 and a diagonal branch cutting edge C-6 The angle α formed by one hook-shaped cut portion, that is, the straight base cut and the oblique branch cut extending linearly from one end of the straight base cut is 95 ° to It is preferably in the range of 165 °, desirably 135 ° to 150 °. The length γ of the linear base cut is preferably in the range of 1 to 4 times, preferably 2 with respect to the shortest distance β from the end G of the straight base cut to the next oblique branch cut. ~ 3 times.
If the angle α is too small or the shortest distance β is too large, the shearing from the end G of the straight base cut will be difficult for the next oblique branch cut, and tearing will not continue. If it is too large or the shortest distance β is too small, the tear resistance is reduced and it is easy to open, but there is a disadvantage that the surface of the carton component plate itself is weakened at the part provided with the cut, so within the above range. Therefore, it is necessary to design a planned fracture line by a combination of a good balance between the strength of the component plate surface and the tear resistance.

Fig.5 (a) is a perspective view for description which shows the assembly state of the other Example of the carton with a fracture line according to this invention. FIG.5 (b) is a perspective view for description which shows the assembly state of the another expansion example of the carton with a fracture line according to the present invention. FIG.5 (c) is an explanatory perspective view which shows the assembly state of the further another expansion example of the carton with a fracture line according to the present invention,
The carton R shown in FIG. 5 (a) is a carton in which the inclined zipper belt portion of the exhibition / conveyance carton shown in FIG. 1 is changed, and the configuration of each face plate is substantially the same as that of the carton Q shown in FIG. Although it is the same and is omitted, the portion to be broken is parallel to the lower end side of the front plate 2 with a predetermined distance in parallel, and the zipper strips 14 and 14 comprising two ridge-like cut rows J and J ′ are in the center. To the corners of the left and right side plates, and the saddle-like cut lines J and J are inclined obliquely upward from the corners, respectively, and the saddle-like cut lines J ′ and J ′ are corners and close to each other. Formed in a substantially Y-shape with a parallel straight base cutting edge and a saddle-shaped cut line made up of one end of the parallel straight base cutting edge and an oblique branch cutting edge extending to the opposite side. Are inclined obliquely upward in succession to the row of cuts K ′ and K ′ starting from the oblique branch cutting edge. In addition, inclined zipper strips 15 'and 15' composed of the ridge-like cut rows J and J and the Y-shaped cut rows K 'and K' are engraved up to the center of the upper end sides of the left side plate 1 and the right side plate 3, respectively. Has been.

When opening the carton R having the above-described configuration, as in the carton illustrated in FIG. 1, a conventional scissor-like cut line J engraved at a predetermined distance from the lower end side of the front plate 2 and opened from the center, The zipper strips 14, 14 made of J ′ are torn to the left and right in the horizontal direction to reach both sides, and continuously, the upper side is made into bowl-like cut rows J, J, respectively, and the lower side is made into a substantially Y-shaped cut row K The inclined zipper strips 15 ′ and 15 ′ formed by “, K” are torn up to the upper end sides of the left and right side plates 1 and 3, respectively, and then, although not shown in the figure, engraved on the upper end sides of the left side plate 1 By cutting the cut M, the break perforation N and the break perforation L8, the upper portion of the front plate 2, the front portions of the left and right side plates 1, 3 and the top plate 6 and the ear piece 9 are removed. The body is composed of a face plate, a back plate and left and right side plates, and the bottom is closed It is intended to open the exhibition possible state of Leh-like.
As described in the description of the conventional example, as shown in FIG. 1 and FIG. 6, when the opening direction is diagonally upward in the zipper band section that obliquely crosses the trunk of the carton, the end of each cut constituting the zipper band section The direction of the shear stress in the case of the individual may vary depending on the user, but it tends to be relatively biased toward the paper grain direction, and the fracture of the cut line at the bottom of the zipper band does not propagate to the next cut line. However, continuous opening becomes impossible, and inconveniences such as paper peeling from the middle part of the zipper belt part and tearing of the zipper belt part occur. On the contrary, in the break of the cut line on the upper side of the zipper band part, even if the direction of the shear stress from the end of each cut constituting the zipper band part is biased toward the paper grain direction, it tends to propagate to the next cut. Therefore, as in the inclined zipper belt portions 15 ′ and 15 ′ in the development example shown in FIG. 5A, the cut row on the upper side of the zipper belt portion is a saddle-like cut row, and the cut row on the lower side of the zipper belt portion. Even when a zipper strip portion having a substantially Y-shaped cut row is used, tearing at the end of each cut propagates to the next cut and can be opened along the opening direction. With this configuration, a part of the long punching blade used for the punching die can be omitted, so that the cost of the punching die can be suppressed. That is, when compared with only the inclined zipper strip, it is possible to omit 1/4 of the punching blades forming the cut row, and reduce costs by reducing the raw materials and processing steps of the punching blades. Is possible.

The carton V shown in FIG. 5 (b) is a so-called sealed end carton that is formed in a rectangular parallelepiped shape by standing in a rectangular tube shape and gluing the left and right side ends, respectively, and has a large opening on the top plate in a flat state. A carton with a take-out port to be formed is usually a carton for use in a state in which a plurality of chocolate confectionery and snack confectionery are stored directly or individually in a single bag and placed on a table. Although a development plan view is omitted, the top plate is continuous from the upper ends on both sides of the knob formed by the parallel vertical lines drilled in the center of the lower end of the front plate 20 and is connected to the front plate 20 via a fold line. On both sides of the unsealed area that interferes with the face plate 60, a rupture planned line consisting of a substantially Y-shaped cut line in which the unsealing direction is from the front plate to the top plate is provided in the left and right symmetrical curved lines. In the carton, a substantially elliptical region extending from the front plate 20 to the top plate 60 is opened by a lifting and opening operation from the knob at the lower end of the front plate 20. As in this embodiment, when a cut line is arranged and opened in a curved shape in the carton body, the opening direction changes at the cuts at the respective positions where the opening direction is arranged. The zipper line may come off due to various changes in conditions such as personal differences, carton holding conditions, etc., but use a substantially Y-shaped cut line made of the punching blade according to the present invention for the curved line of the opening portion Thus, opening along the opening direction in a stable and orderly manner is possible. In this development example, the opening portion has a curved line shape. However, for example, the same applies to a carton that forms a polygonal opening, as the opening direction changes at the cuts at the respective positions. An effect can be obtained.
Further, in the above description, the seal end carton in which the left and right side ends are glued is not limited to this, but a so-called tuck-in carton type carton in which the left and right side ends are closed with plugs with insertions. However, it is possible to apply the above opening form, and it is also possible to apply the above opening form to a top plate that closes the top surface, and has a structure that closes the bottom with a cylindrical shape that forms the periphery of the trunk. . Furthermore, it can also be used for opening the top plate opening of a tissue paper packaging box such as tissue paper.

The carton W shown in FIG. 5C is a so-called sealed end carton that is formed in a rectangular parallelepiped shape by standing up in a rectangular tube shape and pasting both upper and lower ends, and a lid portion formed at the upper end of the carton is opened up. This is a so-called hinge-lid carton, which is usually a hand-held snack candy carton that contains a plurality of stick-shaped chocolate confectionery directly or individually in a packaged state, and is used in a held state. Although not shown in the developed plan view, after tearing the zipper band portion formed by the fracture line composed of a substantially Y-shaped cut line horizontally traversing the front plate 200 constituting the carton body, both sides of the zipper band portion are formed. A broken perforation line that obliquely crosses the left and right side plates 100, 300 (not shown in the figure) from the upper end is cut off, and both ends of the broken perforation line are connected to each other to connect the back plate 400 (in the figure). By bending in the hinge fold line transverse to the non), the lid of the carton top end is OsshaHiraki. In this way, when the zipper belt part horizontally crosses the carton body part, the direction of the shear stress from the end of each cut constituting the planned fracture line is generally horizontal along the paper grain or zipper It works inward from both ends by the pulling operation of the band part, and it can be torn by the zipper band part that consists of the conventional rupture line made of the saddle-shaped cut line, but conversely, the individual difference of the person who uses it or the carton Depending on the holding state, the zipper line may be removed on the contrary, as shown in the figure, if the zipper belt part consisting of the planned break line by the substantially Y-shaped cut line using the punching blade structure according to the present invention is used on the upper and lower sides Opening along the opening direction is possible.
In the carton of the above development example, a zipper belt portion is provided on the front plate, and after opening the zipper belt portion, it is configured to be opened by a lid structure at the upper end. It can be used for a carton that has a zipper strip that extends over the face plate of the four rounds and divides the four rounds, or a zipper strip that is open at one end of the adhesive blockage at the top and bottom ends. For example, it can also be used for an unsealed opening portion such as a glued portion of a covering lid portion used in a carton for a wrap film.

FIG. 7A is an explanatory partial side view showing typical types and shapes of punching blades. FIG. 7 (b) is an explanatory perspective view showing a configuration in which a single cutting blade is used in a substantially Y-shaped cut row according to the present invention. The punching blade used for punching is a paper quality and paper thickness used for carton production. Alternatively, the type to be used is selected from the punching blade shape shown in FIG. 7A depending on the number of production lots, etc., and as shown in FIG. 3 and FIG. . The substantially Y-shaped cut row of the carton punching blades according to the present invention has a tip end of each cutting blade when the straight base cutting blades are brought into close contact with each other as shown in FIG. A gap of 0.7 mm is generated between the two, and two cuts are punched and formed as shown in the developed plan view and perspective view of FIGS. 1, 2A, 5A, 5B, and 5C. The As described above, it is possible to continuously cut in the opening direction by the action of the substantially Y-shaped cut row, but in rare cases, the two parallel cuts are rarely between the two cuts. Delamination may occur and the appearance may be deteriorated.
The configuration of a substantially Y-shaped punching blade using a single cutting blade (reference numeral is omitted) shown in FIG. 7B is a long base cutting blade, and a straight base cutting blade portion is used. The surfaces of the single-cutting blades that have no cutting edges are closely or closely adhered to each other, and one end on the same side is bent in the opposite direction to form a diagonal branch cutting blade, and a Y-shaped cut portion is formed. This is a structure of a punching blade that constitutes a row of cuts continuously in the direction of straight line extension of the straight base cutting edge, and the tip of the cutting edge of the straight base cutting edge portion in close contact or in close contact with In the meantime, a gap of 0.2 mm is generated by design, but in the punching process of actual work, it is punched into a single cut, and each oblique branch cut is continuous from one end of the single cut. Will be formed, and the carton surface by punching So that the no discontinuities Y-shaped cuts are formed in the bent part in.
With the configuration described above, the oblique branch cuts that have received the breaks from the end of the cut row continue continuously to the straight base cuts, and there is no problem of discontinuity of breakage due to discontinuous portions. Further, unlike the configuration of a substantially Y-shaped punching blade by a double-blade punching blade, there is no delamination in the gap between the close linear base cutting blades, and the appearance is not impaired.

The expansion | deployment top view which shows the blank state of the Example of the carton with a fracture line according to the present invention. (A) The explanatory perspective view which similarly shows the assembly state of an Example. (B) The explanatory perspective view which similarly shows the display state after opening of an Example. (A) The top view for description which shows the structure of the conventional Y-shaped punching blade. (B) The explanatory perspective view which similarly shows the structure of the conventional Y-shaped punching blade. (A) The top view for description which shows the structure of the substantially Y-shaped punching blade which comprises the carton with a fracture line according to this invention. (B) The perspective view for description which shows the structure of the punching blade of a substantially Y shape similarly. (C) The top view for description of the substantially Y-shaped cut row. (A) The perspective view for description which shows the assembly state of the other Example of the carton with a fracture line according to this invention. (B) The explanatory perspective view which shows the assembly state of the other expansion | deployment example of the carton with a fracture line according to this invention. (C) The explanatory perspective view which shows the assembly state of the further another expansion example of the carton with a fracture line according to the present invention. The perspective view for description of the carton using the zipper belt | band | zone part by the fracture | rupture planned line which consists of the conventional scissors-like cut line. (A) The explanatory partial side view which shows the typical kind and shape of a punching blade. (B) The explanatory perspective view which shows the structure which used the single cutting blade for the substantially Y-shaped cut line which concerns on this invention.

Explanation of symbols

P Blank Q Carton 1, (31) Left side plate 2, (22), (32) Front plate 3, (23) Right side plate 4, Back plate 5 Adhering plate 6, (26), (36) Top plate 7 Difference Inlay plate 8, 9 Ear piece 10, 11, 12, 13 Bottom component plate 14 Zipper belt portion 15, 15 'Inclined zipper belt portion J, J' Knot-like cut row K, K 'Abbreviated Y-shaped cut row L1-L7 , L9 to L14 Folding line L8 Break perforation line M Cut line N Break perforation line B-1, B-2, B-4 Long punching blades C-1, C-5 Straight base cutting blades C-2, C- 3, C-6 Diagonal branch cutting edge D-1, D-2, D-4 Embedded portion E-1 Stepped portion F Folding portion G End of straight base portion cut α Straight base portion cut and oblique branch portion Angle to cut β Shortest distance between straight base cut end and diagonal branch cut γ Length of straight base cut H Conventional example Carton R, V, carton X contents of the W Deployment Example

Claims (7)

A carton that has a planned break line formed by a row of cuts arranged intermittently at a predetermined part of a carton, and opens a predetermined region of the carton by tearing and breaking the planned break line. Are formed by a linear base cut parallel to each other and a diagonal branch cut extending linearly from one end on the same side of the parallel linear base cut to symmetrically opposite sides. A carton with a planned breaking line, wherein the Y-shaped cut portions are cut rows arranged intermittently on the extension of the parallel straight base cuts. In the predetermined part of the carton, the oblique line branch cut of the cut portion is arranged on the start end side in the opening direction, and the linear base cut is arranged on the end side in the opening direction, and the cut row is provided. The carton with a fracture line according to claim 1. The carton with a planned breaking line according to claim 2, wherein the cut portions are arranged in a straight line at a predetermined portion of the carton, and the cut row is provided in a straight line. The carton with a planned breaking line according to claim 2, wherein the cut portions are arranged in a curved line at a predetermined part of the carton, and the cut line is provided in a curved line. The angle formed by the straight base cut and the oblique branch cut extending linearly from one end of the straight base cut is 95 ° to 165 °. 4. A carton with a fracture line according to any one of 4 above. The carton with a planned breaking line according to any one of claims 1 to 5, wherein the incision row is a zipper belt portion formed in a belt shape composed of two strips parallel to each other at a predetermined interval. The punching blades that form the substantially Y-shaped cut portion are each formed of a single-cutting blade, and the surfaces having no cutting edges of the single-cutting blades are in close contact with each other at the parallel base cut portions. A carton with a planned fracture line according to any one of claims 1 to 6.

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