JP2005126148A - Easily openable carton - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an easily openable bag type carton capable of opening a top section and a front panel simultaneously. <P>SOLUTION: A break line 12 is provided in which an lower part is closed and an upper part is opened in the upper half section of a front side-wall panel 2, a top panel 8, a front cover 9 and a tab 10 are extendedly provided from the upper region of a rear face side-wall panel, the front side-wall panel is covered with the front cover, and this is the carton which is composed by that an opening strip 3 and the front cover are adhered, and of which the opening strip opens the heavens section and the front panel by that the front cover is separated from the front panel by pulling up the tab 10, the tab is a size which can reclose by being inserted into the inside of the opening section of the front side-wall panel opened by the opening strip, a folding line 13 in the root of the tab is positioned between the lowest end of an adhering section 14 and the knot 16 of the lower part of the break line, moreover, this is the carton good in opening properties in which the folding line in the root of the tab 10 is located in the deepest section of a notch 15 provided in both the ends of the tab. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an easy-opening carton that opens not only the top part but also the upper half part of the front panel so as to make it easy to take out products such as confectionery and food.

Bag type with a front cover that covers the top plate by covering the top panel and the front panel by extending the rear panel of the four side wall panels that surround the rectangular bottom plate into a lid. Carton is mainly used for confectionery, chocolate, etc. When the carton lifts the knob at the front end of the front cover that almost covers the front panel, the opening piece, which is defined by the cut line formed in the front panel, is separated from the front panel and attached to the back of the front cover. It is worn and taken away, allowing a large opening in the front panel. Such an operation makes it easy to take out the individually packaged goods, and also shows a display effect.
Furthermore, it can be resealed by inserting the knob at the tip of the lid into the slit of the front panel.
Although the above-described opening is a paperboard single layer, a so-called bag-in carton having an inner bag sealed on the inner side of the carton has been proposed having an easy-opening property with a large opening at the front and upper surfaces.

However, in the carton as described above, when the knob at the top of the lid is lifted, the adhesive layer remains on the surface of the opening piece of the front panel, and the opening is not destroyed and only the top is opened without being opened. There is a problem. In order to solve this problem, if the adhesion area is increased in order to increase the adhesion between the opening piece and the front cover of the lid, the adhesive protrudes in a small carton and impairs the design and aesthetics. There is a problem that the cost of the adhesive is high.
In addition, if the cutting edge part of the opening line is long, the connecting part is reduced, or the cutting line shape is made weaker by changing the shape of the cutting edge, a slight impact will occur at the distribution stage before opening by the end user. The problem of opening will occur.
The present invention has been made in view of the above-described problems, and it is necessary to obtain an opening in the front panel regardless of who opens it with the minimum necessary adhesion area and without needing to weaken the cut line more than necessary. An object of the present invention is to provide a bag-type easy-opening carton that can be opened stably and easily and can be easily reclosed.

  The present invention, which has been made to solve the above-mentioned problems, is defined by a cut line in which the lower part is closed to the upper half of the front side wall panel and the upper part is opened in the side wall panel raised from the periphery of the square bottom plate. The front cover is extended from the upper side of the rear side wall panel that is raised so as to face the front side wall panel through the folding line in this order, and is tilted to the front side. The front side wall panel is covered with a knob piece, and the opening piece and the front cover are bonded to each other by an adhesive portion provided at a predetermined position. By lifting the knob piece, the opening piece becomes a back surface of the front cover. In a bag-type carton that is separated from the front panel and has a large opening between the top and the front panel, the knob is widely inserted inside the opening of the front side wall panel that has a large opening. The fold line at the base of the knob is located between the lowermost end of the adhesive part and the joint at the lower part of the cut line, so that the adhesive part has a tensile force. When the knob is lifted by using the resistance stronger than the shearing force, the force of the peeling force moves to the position of the fold line at the base of the knob, and the tension of the adhesive portion is increased by the pulling force. The lower end also lifts up, but does not cause delamination at the adhesive part during this time, and surely breaks the joint at the lower part of the cut line, and this breakage extends to the entire cut line and the opening piece is surely The front side wall panel can be opened with being attached to the front cover, and the folding line at the base of the knob is located at the deepest part of the notch provided at both ends of the knob. Need an open carton To.

In the invention according to claim 1, when opening the lid portion of the bag-type carton, the fold line at the base of the knob is located between the lowermost end of the adhesive portion and the joint below the cut line. As a result, the tensile force in the vertical direction is large, and the cut line can be surely cut while preventing delamination at the bonded portion. Therefore, the opening can be stably opened as compared with the conventional bag-type openable carton. And it is easy to reseal by inserting the knob into the inside of the opened front panel. Further, since the knob is formed large on the front side wall so that it can be widely inserted inside the opening of the panel, it is easy to pull, and an attractive design effect can be obtained. Furthermore, once opened, it cannot be returned to its original state, so that it can also have a mischief prevention mechanism.
In addition, when re-sealing, the lid part is inserted into the front side wall panel where the knob piece is opened until the edge of the front side wall panel presses into the deepest part of the notch provided at both ends of the knob piece, so that the lid part Since the front side wall panel can be sandwiched and fixed by the front covers at both ends, re-sealing becomes easy and reliable in combination with the wide formation of the knob.

  The present invention is a bag-type carton in which an opening piece separated from the cut line of the front side wall panel is attached to the back surface of the front cover and opens the top part and the front panel to a large extent. Is placed between the bottom end of the adhesive part that attaches the opening piece and the front cover, and the joint below the cut line of the front side wall panel, and a lot of tensile force in the vertical direction is applied to the adhesive part, While preventing delamination at the bonded part, it is possible to eliminate the unopened state of the front panel by reliably cutting off the cut line, and inside the front side wall panel where the knob is opened in the case of resealing, Insert the lid until the edge of the front side wall panel touches the deepest part of the notch provided at both ends of the knob, so that the lid is sandwiched between the knob and the front cover at both ends. In can be fixed.

Hereinafter, it demonstrates in detail based on drawing.
FIG. 1 is a developed view of a carton blank of an easily openable carton, FIG. 2 is an explanatory view of opening and resealing of an easily openable carton according to the present invention, FIG. 3 is an explanatory view of easy openability according to the present invention, and FIG. FIG. 5 is an explanatory view of opening of a conventional carton.
First, regarding the problem of the conventional carton, when the handle (10) of the front cover of the carton before opening shown in FIG. 5 (a) is pulled up, the case is opened as shown in FIG. 5 (b). That is, the opening piece (K) defined by the cut line of the front panel is adhered and removed on the back side of the front cover, and the front panel opens greatly. However, as shown in FIG. 5C, the opening piece (K) often remains as it is, and there arises a problem that only the front cover is lifted with the adhesive (S) remaining mostly. In this case, a hot melt type adhesive is used as the adhesive (S).
When the carton is resealed, the knob (10) is inserted into the slit (SL) provided on the front panel, and the lid is fixed.

The present invention was invented in order to solve the problem that only the front cover is lifted with most of the adhesive (S) left as described above.
That is, FIG. 1 is a development view of a carton blank of an easy-open carton according to the present invention. When this carton is molded, the front panel (2), rear panel (7), left and right panels (5) are formed from four sides of the bottom plate (1). ) (6) will stand up. An opening piece (3) is partitioned by a cut line (12) at the upper part of the front panel (2), and an adhesive part (14) is provided at the lower part of the opening piece (3). In addition, a top panel (8), a front cover (9), and a knob (10) are sequentially extended on the upper side of the rear panel (7). A folding flap (4) is connected to the bottom plate (1), and an adhesive margin (11) is connected to the right panel.
FIG. 1 is an exploded view of a carton blank of an embodiment of an easy-open carton according to the present invention, and is a figure of a bag-type carton whose lid (8) (9) (10) covers a front panel (2). It is not limited to one form.

FIG. 2 is an explanatory view of opening and resealing the easy-opening carton according to the present invention formed from the carton blank shown in FIG. 1, and the state-of-the-art knob (10) of the lid shown in FIG. It is larger and has a fold line (13) at its root. Therefore, when the knob (10) is pulled up, it is bent at approximately 90 ° at the fold line (13), and a force is applied to peel off the front cover from the position of the fold line (13).
As a result, as shown in FIG. 2B, the carton is opened, and the upper portion of the front panel (2) is greatly opened.
When taking out the individually packaged product and resealing it, insert the knob (10) into the inside of the front panel (2), and make sure that the deepest part of the notches (15) provided on both sides of the knob (10). The lid is fixed if it is inserted deeply until it reaches the edge of the front panel from which the opening piece (3) is cut off.

Next, a mechanism for achieving reliable and normal opening of the present invention will be described with reference to FIG.
In FIG. 3, A is the lowest end of the adhesive portion, B is joint (16) on the underside of the mouthpiece (in practice are provided right and left two positions described in one place for clarity.) C indicates the force points at which the peeling force is first applied to the front cover as a lid.
First, a conventional carton will be described with reference to FIG. 3 (a) and FIG. 3 (a ′) which is an xx section in FIG. 3 (a).
The peeling force applied to the C point of the knob is transmitted to the A point. In this case, since A and C are considerably separated from each other and the paperboard is bent, a shearing force for peeling the adhesive layer from the lower end acts on point A. In general, in the case of a hot melt adhesive, the adhesive force at the interface with the paperboard on both sides of the adhesive layer is weak, and in particular, the adhesive force with the back surface with many recycled fibers is weak against shearing force and easily peels off. Therefore, as shown in FIG. 3 (a '), the peeling force transmitted from the C point to the A point disappears due to the peeling of the adhesive portion, and does not reach the B point, so the lowermost connecting portion of the cut line (12) (16) cannot be cut, and the opening piece (3) remains as it is.
The cut line (12) is designed so that the whole can be easily and continuously broken if the lower joint is broken.
Therefore, in the present invention, as shown in FIG. 3 (b ′) which is a yy section in FIG. 3 (b) and FIG. 3 (b), the first force point C of the peeling force is provided between A and B, The distance between A and C was made extremely small. By doing so, when the knob (10) is lifted as shown in FIG. 3 (b ′), the force C of the peeling force moves to the position of the fold line (13), and the point C of the front cover is lifted up. When you do, it will try to lift point A next to it. That is, as indicated by the thick arrow, the upward pulling force acts on the point A more than the shearing force. In general, since the adhesive layer has a resistance stronger than the shearing force to the tensile force, delamination or shear failure does not occur at the adhesive part, and the peeling force propagates from the point A to the point B to connect the joints (16 The front panel can be opened with the opening piece (3) firmly attached to the front cover (9).
Here, it is preferable that the distance between A and B is narrow, and the point C is preferably as close to the point A as possible. Moreover, it is formed in the size which can be reinserted widely inside the opening part of the front side wall panel which the knob piece opened largely with the opening piece, and is easy to pull by having enlarged the knob piece (10). At the same time, a design effect can be provided.

  Further, according to the present invention, notches (15) are provided on both sides of the knob (10) as shown in FIG. 4 (a), and fold lines are provided so as to connect the deepest portions. By adopting such a configuration, the broken line (13) can be positioned between A and B without impairing the design, and as shown in FIG. The edge of the opening of the front panel bites into the notches (15) at both ends, and the edges of the opening are held down by the repulsive force of the left and right paperboards of the notches (15). It becomes a state and the front cover (9) used as a lid | cover can be fixed. If the front cover is to be fixed more firmly, the notches on both sides may be cut (slits) (15 ') as shown in FIG. 4 (b).

  The cardboard for the carton of the present invention is preferably a coated ball, but it can also be used for a paperboard using a large amount of recycled pulp on the back surface, and the range of usable paperboard is widened. The basis weight of the paperboard can be appropriately selected from the range of 250 to 400 g / m @ 2 depending on the carton size and the weight of the contents.

Development view of carton blank of easy-open carton Easy-open carton opening and re-opening explanation diagram Illustration of easy opening Explanation of the knob Conventional carton opening explanation diagram

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bottom plate 2 Front side wall panel 3 Opening piece 4 Folding piece 5 Right side panel 6 Left side panel 7 Rear side wall panel 8 Top plate 9 Front cover
10 Picks
11 adhesive
12 Cut line
13 Polyline
14 Bonding part
15 Notch
15 'notch
16 joints
20 Carton blank according to the present invention K Opening piece S Bonding part
SL slit

Claims (1)

An opening piece partitioned by a cut line is provided in the upper half of the front side wall panel in the side wall panel raised from the periphery of the quadrangular bottom plate so that the lower part closes and the upper part opens, and faces the front side wall panel. The top panel, the front cover, and the knob piece are extended from the upper side of the rear side wall panel in this order through the fold line, respectively, tilted forward, the front cover and the knob piece cover the front side wall panel, and the opening A piece and the front cover are bonded to each other by an adhesive portion provided at a predetermined position, and by pulling up the knob piece, the opening piece is attached to the back surface of the front cover and separated from the front panel, and the top portion And in a bag-type carton that opens a large front panel,
The knob piece is formed in a size that can be re-closed by being inserted wide inside the opening of the front side wall panel that is greatly opened by the opening piece, and the fold line at the base of the knob piece is the lowermost end of the adhesive portion and the cut line By being located between the joints at the bottom of the line,
Utilizing the fact that the bonded portion exhibits a resistance stronger than the shearing force to the pulling force, when the knob is lifted, the strength of the peeling force moves to the position of the fold line at the base of the knob, and the pulling force The lowermost end of the bonded portion is also lifted up by this, but during this time, delamination does not occur at the bonded portion, and the joint below the cut line is surely broken, and this breakage extends to the entire cut line. The front side wall panel can be opened with the opening piece securely attached to the front cover, and the folding line at the base of the knob is located at the deepest part of the notch provided at both ends of the knob. Easy-open carton characterized by that.

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