JP2012012037A - Zipper structure bidirectionally breakable in seal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure more excellent than conventional ones in the ease of operation, a shape of a breaking line after torn-off or the like, relating to a zipper which can be torn off in both directions.SOLUTION: Breaking lines 11 and 12 of the zipper comprise a plurality of first cuts and a plurality of second cuts alternately and repetitively arranged along a virtual line L extending in a tear-off direction. Where the respective areas divided into two areas by the virtual line L are an upper area and a lower area, the first cut 1 is composed of one continuous curved line having "a center region having an apex in the upper area and extending toward the lower area while curving right and left from the apex" and "two skirts connected with both ends of the center region having the lowermost point in the lower area and returning in a direction of directing to the upper area while curving". The second cut 2 has a shape line-symmetric to the first cut 1 with respect to the virtual line L and has the apex in the lower area. In addition, the first cut 1 and the second cut 2 have their skirts overlapping in a direction along the virtual line L.

Description

  The present invention relates to a zipper structure for breaking a paper box or other carton. More particularly, the present invention relates to a zipper structure that can be broken in both directions.

  For example, various types of confectionery boxes that are opened by tearing an elongated zipper are conventionally known. Many zippers are configured to tear only in a predetermined direction, but zippers that can be opened from both directions have been proposed so that even visually impaired persons, children, and the like can easily open them (Patent Literature). 1).

Furthermore, Patent Document 2 discloses a specific zipper structure for preventing a cutout portion after breaking the zipper from becoming jagged in a zipper that can be opened from both directions. If the cut-out portion becomes jagged, there are problems such as undesirable appearance and scratching the fingertip.
In addition, a zipper that can be broken in both directions is also disclosed in Patent Document 3. In FIGS. 7 and 8 of Patent Document 3, the cut lines constituting the zipper are curved lines, and it is considered that the cut portions after tearing are smooth. However, when looking closely at the figure, the cuts that appear to be curved at first glance are actually configured as if they were curved lines by combining a plurality of straight lines. In this case, as the cutting blade for forming the cut in the blank, one cutting blade bent at a plurality of locations is used, or a plurality of linear blades are used in combination. It is technically difficult to create a bent cutting blade. In addition, when trying to approximate a curved shape by combining a plurality of straight blades, it is necessary to set the arrangement and interval of each straight blade finely, and press the cutting blade against a blank to form a shot (cut). As the number of times increases, the problem arises that the blade is chipped or worn, resulting in a poor finish.

JP 10-101064 A JP 2005-178788 A Japanese Patent No. 3462192

  In view of the above-mentioned problems of the prior art, the present invention relates to a zipper that can be broken in both directions, and the shape of the broken line after breaking is smooth, and the durability of the cutting blade used to form the zipper It aims at providing the zipper structure excellent in property.

  The present invention has been devised in order to effectively solve the above problems, and provides a zipper structure having the following features.

The zipper structure of this invention opens the said box by tearing off the strip | belt-shaped area | region pinched | interposed into the two breaking lines formed in the wall of the box.
The breaking line is composed of “a plurality of first cuts” and “a plurality of second cuts” that are alternately and repeatedly arranged along a virtual line extending in the breaking direction.
When each region divided into two by the virtual line is an upper region and a lower region, the first cut is “having a vertex in the upper region and extending from the vertex to the lower region while curving left and right. It is composed of a single continuous curve line having “a central part” and “two skirts that are connected to both ends of the central part and have the lowest point in the lower region and turn in the direction toward the upper region while being curved”. ing.
The second cut is symmetrical with the first cut with respect to the virtual line, and has a vertex in the lower region. And as for the 1st cut and the 2nd cut, each skirt part has overlapped in the direction which meets the above-mentioned virtual line.

  It is preferable that the shapes of the first cut and the second cut are symmetric along the virtual line.

  In the present invention, the terms “upper region” and “lower region” are merely what distinguishes the two regions for convenience of explanation. The plane is divided into two regions by one imaginary line, and the two regions are expressed in an easily distinguishable manner. Therefore, the relationship between “upper” and “lower” may be reversed, and the relationship between “right” and “left” may be replaced.

  In the zipper structure of the present invention having the above-described configuration, (i) the first cut and the second cut each have a skirt that is continuous with both ends of the center portion, and the shapes of the first cut and the second cut Is symmetric about the virtual line. (Ii) In the adjacent first cut and second cut, the vertex of the central portion is at the opposite position with respect to the imaginary line, and the skirt portion of one cut turns in the direction toward the skirt portion of the other cut. It will be. Further, (iii) the adjacent first cut and second cut are overlapped in the direction along the imaginary line.

  As a result of the structural features of (i) to (iii) above, the adjacent first cut and second cut extend in the direction of approaching each other so that the skirts of each other take their hands. It becomes. Since this relationship exists on both the left and right sides of one cut, this zipper structure can be broken smoothly in either the left or right direction.

Further, in the zipper structure of the present invention, each of the first cut and the second cut is constituted by one continuous curved line, so that the manufacturing process can be simplified and the cost can be reduced.
That is, since each cut is a curved line, the cutting blade for forming the said cut into a blank can also use the single cutting blade which has a curved shape corresponding to this. In other words, it is not necessary to use one bent cutting edge that is technically difficult to manufacture, and the above-described problems (poor durability and finishability) when a plurality of linear blades are combined can be solved. .
In addition, since the cutting edge has a curved shape, it is possible to make a rupture mark smooth after breaking the zipper.

  The shapes of the first cut and the second cut are more preferably left-right symmetric along the virtual line. In this way, the fracture surface after tearing is more beautiful, and the feel when tearing is not different when the tear is opened from either direction.

The perspective view which shows an example of the paper box provided with the zipper structure of this invention. The enlarged view of the zipper structure in FIG.

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a paper box 10 having the zipper structure of the present invention. The paper box 10 is a packaging box that stores and sells confectionery and the like, and includes a zipper structure 20 on the top surface.
1 (a) shows the state before opening, and FIG. 1 (b) shows the state after opening. After opening, the insertion piece 15 is inserted into the slit 16 so that the paper box 10 can be restored. Sealing is possible.

  FIG. 2 is an enlarged view of the zipper structure 20 on the top surface. The zipper structure 20 is composed of an elongated band-like region 13 sandwiched between two break lines 11 and 12 formed on the top wall of the paper box 10, and the paper box 10 is opened by breaking this. The belt-like region 13 can be torn off in either the left or right direction, and includes similar knobs 13a and 13a at both ends. In the figure, the first cut 1 and the second cut 2 constituting the fracture line 11 are further enlarged.

  In the present invention, with respect to a zipper that can be broken in both directions, in order to provide a structure that is superior to conventional ones in terms of operability and the shape of the broken line after breaking, the specific configuration of the broken lines 11 and 12 Devised about. These are described below.

≪Feature 1≫
In FIG. 2, the virtual line (L) is literally a virtual line and indicates the breaking direction of the zipper. The breaking line 12 is composed of “a plurality of first cuts 1” and “a plurality of second cuts 2”. The first cut 1 and the second cut 2 are alternately and repeatedly arranged along the virtual line (L).

For convenience, in FIG. 2, each region divided into two by the virtual line (L) is defined as an upper region and a lower region. The first cut 1 is “a central part having an apex a in the upper area and extending from the apex a toward the lower area while curving left and right” and “the lowermost point in the lower area, connected to both ends of the central area. and a single continuous curve line having two skirt portions that bend in the direction toward the upper region while being curved.
The second cut 2 is symmetrical with the first cut 1 with respect to the virtual line (L).

  As described above, the first cut and the second cut have substantially the same shape, but their postures are different by 180 °. That is, the cuts of the same shape are arranged alternately while changing the direction.

By forming each cut with one continuous curved line, there are the following merits. That is, in order to form a cut in the blank in the manufacturing process, the corresponding curved cutting blade is pressed, but the cutting blade can be easily processed. If it is attempted to approximate the curved shape using a single cutting blade that is bent at a plurality of locations, or a plurality of straight blades, it is difficult to create the cutting blade in the former case. It is necessary to set the arrangement and interval of the straight blades finely, which leads to an increase in cost. In addition, when multiple straight blades are used, generally, chipping and abrasion are likely to occur during repeated shots (pressing the cutting blade against the blank to form a cut), resulting in poor durability. In addition, there is a problem that the finish is deteriorated thereby, but in the present invention in which one curved cutting blade can be used, such inconvenience does not occur.
Moreover, when the cutting edge has a curved shape as in the present invention, the fracture mark after the zipper is broken can be made smooth.

≪Feature 2≫
The vertex a of the first cut 1 exists in the upper region, and the vertex a of the second cut 2 exists in the lower region. That is, the vertex a of the first cut 1 and the vertex a of the second cut 2 are located in regions on the opposite side with respect to the virtual line (L). Thereby, it is prevented that the 1st cut 1 and the 2nd cut 2 leave | separate too much in the direction orthogonal to a virtual line (L), and progress of a fracture line advances smoothly.

  Moreover, in the adjacent 1st cut 1 and 2nd cut 2, the skirt part of one cut will be turned in the direction which goes to the skirt part of the other cut. As a result, the skirts of each other extend in the direction of approaching each other as if they are holding hands. Since this relationship exists on both the left and right sides of one cut, this zipper structure can be broken open in either the left or right direction.

  Note that, in the illustrated example, the skirt portion of the first cut 1 is folded back in the direction toward the upper region, but the end thereof is preferably stopped in the lower region. This is because if the skirt regions of the first cut 1 and the second cut 2 that are adjacent to each other are too close, the strength of the paper box decreases at that portion, which is not preferable.

≪Feature 3≫
As for the 1st cut 1 and the 2nd cut 2, each skirt part has overlapped in the direction which meets a virtual line (L). By overlapping the first cut 1 and the second cut 2, it is possible to appropriately guide the progress of the breaking line when breaking the zipper in a predetermined direction.

≪About the upper area and the lower area≫
In the present specification, the terms “upper region” and “lower region” are merely what distinguishes the two regions for convenience of explanation. The plane is divided into two regions by one imaginary line, and the two regions are expressed in an easily distinguishable manner. Therefore, the relationship between “upper” and “lower” may be reversed, and the relationship between “right” and “left” can be considered.

≪Others≫
The specific forms of the first cut 1 and the second cut 2, that is, the dimensions, the degree of bending, and the like are not limited to those illustrated. For example, in the figure, the first cut 1 and the second cut 2 have substantially the same shape except for the different directions, but such a configuration is not necessarily required.
Moreover, as shown in figure, it is preferable that the 1st cut 1 and the 2nd cut 2 are a left-right symmetric shape along a virtual line (L). The reason is that the fracture surface after tearing is more beautiful, and the feel when tearing is not different when it is torn from either direction. However, it is not necessarily symmetrical.

  The first cut and the second cut constituting the break line 12 are the same as described above.

DESCRIPTION OF SYMBOLS 1 1st cut 2 2nd cut 5 Insert piece 6 Slit 10 Paper box 11, 12 Break line 13 Band-like area 20 Zipper structure

Claims (2)

A zipper structure that opens the box body by tearing the band-like region (13) sandwiched between the two break lines (11, 12) formed on the wall of the box body (10),
The break line (11, 12) is composed of a plurality of first cuts (1) and a plurality of second cuts (2) arranged alternately and repeatedly along a virtual line (L) extending in the break direction,
When each region divided into two by the imaginary line (L) is an upper region and a lower region, the first cut (1) is “the lower region has a vertex in the upper region and is curved left and right from the vertex. A continuous portion having “a central portion extending toward the center” and “two skirt portions that are connected to both ends of the central portion and have a lowermost point in the lower region and bend in a direction toward the upper region while being curved” Composed of curved lines,
The second cut (2) is symmetrical with the first cut (1) with respect to the virtual line (L), and has a vertex in the lower region,
The zipper structure, wherein the first cut (1) and the second cut (2) are overlapped in the direction along the virtual line (L).   The zipper structure according to claim 1, wherein the shapes of the first cut (1) and the second cut (2) are symmetrical along the virtual line (L).

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