Zipper construction

Abstract

To provide a zipper structure that a belt-like portion in a predetermined surface can be broken away, in which the belt-like portion is to be broken from an arbitrary part other than both ends of the belt-like portion as a start point.SOLUTION: A zipper structure 100 comprises a belt-like portion 30 that is sandwiched by respective ones of first and second break lines 10, 20 and configured to be broken away. The first break line 10 and the second break line 20 comprise a plurality of first cut lines 11, 21 that are cut lines configured to guide breakage toward a first direction of the belt-like portion 30. The belt-like portion 30 comprises a plurality of second cut lines 31, in which the second cut line 31 includes a turn-back point 31c on a second-direction side as viewed from one end 31a and has the other end 31b on a first-direction side as viewed from the turn-back point 31c. When the belt-like portion 30 is broken away, one of the plurality of second cut lines 31 is selected so that the selected second cut line 31 becomes a start point of breakage toward the first direction of the belt-like portion 30.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a zipper structure that is applied to a paper box or the like, and separates a predetermined surface of the paper box or the like into a first surface and a second surface by tearing off a strip-shaped portion on the predetermined surface. [Background technology]

[0002] Conventionally, a zipper structure that is applied to a paper box or the like is known. For example, the zipper structure includes two break lines provided on a predetermined surface of the paper box or the like, and a strip-shaped portion that is sandwiched between the break lines and configured to be torn off from the surface. When the strip-shaped portion is torn off, the zipper structure separates the surface into a first surface including a first break line that is one of the break lines, and a second surface including a second break line that is the other of the break lines. This allows the paper box or the like to be opened.

[0003] In this type of zipper structure, from the viewpoint of ease of use for consumers and improvement of safety, the following Patent Documents 1 and 2 disclose a break line having a plurality of cuts having a predetermined shape. The cut has a continuous path from one end to the other end, and the other end is located on the side of the break direction when viewed from the one end. The path includes a curved part in a mountain shape between the one end and the other end, and a skirt part extends from the curved part toward the one end and the other end. By regularly arranging the cuts configured in this way, the band-shaped part can be torn off from the surface regardless of which of the two ends of the band-shaped part is used as the starting point. Furthermore, the break line after the band-shaped part is torn off is smooth and not jagged. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2014-133597 A [Patent Document 2] Japanese Patent Application Publication No. 10-81326 Summary of the Invention

[0005] However, in order to further improve ease of use in this type of zipper structure, there is a demand for tearing off the band-like portion from an arbitrary portion other than both ends of the band-like portion, for example, a portion corresponding to the middle between both ends, etc. The above-mentioned patent documents do not disclose any technology related to this point, making it difficult to meet this demand.

[0006] The object of the present invention is to provide a zipper structure in which a band portion on a specified surface is torn off to separate the surface into a first surface and a second surface, in which the band portion can be torn off from any point other than both ends of the band portion.

[0007] The zipper structure according to the present invention comprises at least two break lines provided on a specific surface, and a strip portion sandwiched between the two break lines, extending in a first direction which is a break direction, and configured to be torn off from the surface in the first direction, such that when the strip portion is torn off in the first direction, the surface is separated into a first surface including the first break line which is one side of the break lines, and a second surface including the second break line which is the other side of the break lines.

[0008] The zipper structure according to the present invention is characterized in that the first and second break lines at least include a plurality of first cuts, which are cuts having a continuous path from one end to the other end and are configured to guide tearing of the band-like portion in a first direction, and the band-like portion at least includes a plurality of second cuts, which are cuts having a continuous path from one end to the other end and include a turn-back portion as an intermediate portion of the path on a second direction side opposite to the first direction as viewed from the one end, and the other end of the path is configured to be on the first direction side as viewed from the turn-back portion, and when the band-like portion is torn off, one of the plurality of second cuts is selected, and the selected second cut becomes a starting point for tearing off the band-like portion in the first direction. The first cut in one of the two break lines is configured integrally with the second cut, and the first cut in the other of the two break lines is configured separately from the second cut. The point is...

[0009] According to the present invention, the strip is provided with a second cut. The folded portion of the path at the second cut is located on the second direction side as viewed from one end and the other end. Therefore, the folded portion can be raised like a flap toward the first direction side and gripped with the one end and the other end as a fulcrum. In addition, the second cut can be provided, for example, in a plurality of places along the first direction, midway between both ends of the strip. When tearing off the strip, one of the second cuts can be selected and used as a starting point for tearing off while holding the second cut. Starting from the selected second cut, the strip is guided to the first cut and torn off in the first direction. Thus, according to the present invention, the strip can be torn off starting from any part other than both ends of the strip.

[0010] In the zipper structure according to the above invention, the second cuts are preferably configured such that one end is located closer to the first break line than the other end and on a first virtual line that is a virtual line parallel to the first direction, and the other end is located closer to the second break line than the one end and on a second virtual line that is a virtual line parallel to the first direction, and the band-shaped portion further comprises a first region sandwiched between the first break line and the first virtual line and extending in the first direction, a second region sandwiched between the second break line and the second virtual line and extending in the first direction, and an intermediate region sandwiched between the first virtual line and the second virtual line and extending in the first direction, and the first cuts are preferably configured such that a part of the path of the first cut of the first break line extends from the intermediate region to the first region so as to cross the first virtual line, and / or a part of the path of the second break line extends from the intermediate region to the second region so as to cross the second virtual line.

[0011] In the zipper structure according to the above invention, the first cut is configured such that one end of the first cut of the first break line is located on a third imaginary line which is an imaginary line parallel to the first direction relative to the other end of the first cut of the first break line, and one end of the first cut of the second break line is located on a fourth imaginary line which is an imaginary line parallel to the first direction relative to the other end of the first cut of the second break line, and the cut has a continuous path from one end to the other end, the path being an imaginary line which starts at one end of the first cut of the first break line and extends in the first direction relative to the one end of the first cut of the first break line, and which forms an angle with the third imaginary line. and the angle on the side of the first direction a fifth imaginary line which forms an acute angle with the fourth imaginary line, and a virtual line which starts at one end of the first cut of the second break line and extends in the first direction as viewed from the one end of the first cut of the second break line, and which forms an angle with the fourth imaginary line and the angle on the side of the first direction and a sixth imaginary line forming an acute angle therewith. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a plan view showing a zipper structure according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is an enlarged view of the zipper structure shown in FIG. 1. [Diagram 3] FIG. 2 is a diagram for explaining a method of arranging cuts in the zipper structure shown in FIG. 1. [Figure 4] FIG. 2 is a perspective view showing a paper box to which the zipper structure shown in FIG. 1 is applied. [Diagram 5] FIG. 4 is a plan view showing a zipper structure according to a second embodiment of the present invention. [Figure 6] FIG. 6 is an enlarged view of the zipper structure shown in FIG. 5. [Figure 7] 10A and 10B are diagrams illustrating the shapes of a first cut and a second cut of a zipper structure according to a modified example of the present invention. [Figure 8] FIG. 11 is a plan view showing a zipper structure according to a modified example of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, various embodiments of the zipper structure according to the present invention will be described with reference to the drawings.

[0017] First Embodiment First, the first embodiment will be described. Fig. 1 is a plan view showing a zipper structure 100 according to the first embodiment of the present invention. In the following description, the front-rear direction and the left-right direction correspond to the front-rear direction and the left-right direction as seen from a user of a paper box or the like to which the zipper structure 100 is applied, as shown in each figure, and correspond to the directions of appropriate arrows in each figure.

[0018] As shown in Fig. 1, the zipper structure 100 includes a first break line 10 and a second break line 20 provided on a predetermined surface, and a strip portion 30 sandwiched between the two break lines 10, 20. The strip portion 30 extends in a break direction (hereinafter also referred to as the "first direction") from left to right, and has a predetermined strip width in the front-rear direction. The strip portion 30 is configured to be able to be torn off from the surface in the first direction.

[0019] The first break line 10 corresponds to the front end of the band-shaped portion 30 and has a plurality of first cuts 11. The second break line 20 corresponds to the rear end of the band-shaped portion 30 and has a plurality of first cuts 21. The first cuts 11, 21 are cuts having a continuous path from one end 11a, 21a to the other end 11b, 21b. The plurality of first cuts 11, 21 are provided at predetermined intervals along the first direction at each of the front end and rear end of the band-shaped portion 30. As a result, the first cuts 11, 21 are configured to guide the tearing off of the band-shaped portion 30 in the first direction.

[0020] The band-shaped portion 30 has a plurality of second cuts 31. The second cuts 31 are cuts having a continuous path from one end 31a to the other end 31b. The plurality of second cuts 31 are provided at a predetermined interval along the first direction, approximately in the center in the front-to-rear direction of the band-shaped portion 30. When the band-shaped portion 30 is to be torn off, one of the plurality of second cuts 31 is selected. The second cuts 31 are configured so that the selected second cut 31 becomes the starting point for tearing off the band-shaped portion 30 in the first direction.

[0021] Furthermore, the first break line 10 and the second break line 20 have a plurality of third cuts 12, 22. The third cuts 12, 22 are cuts having a continuous path from one end 12a, 22a to the other end 12b, 22b. The plurality of third cuts 11, 21 are provided at a predetermined interval along the first direction at each of the front end and the rear end of the band-shaped portion 30. The third cut 12 is disposed between two adjacent first cuts 11 in the first direction. The third cut 22 is disposed between two adjacent first cuts 21 in the first direction. The third cuts 12, 22 are configured to act as relays between the cuts constituting the break line when the band-shaped portion 30 is torn off, and to suppress deviation of the band-shaped portion 30 from the first direction.

[0022] As shown in the area surrounded by the dashed line in FIG. 1, units including the first cuts 11, 21, the second cuts 31, and the third cuts 12, 22 are repeatedly arranged in parallel in the first direction. In one unit, one first cut 11 and two third cuts 12 are provided on the first break line 10, one first cut 21 and two third cuts 22 are provided on the second break line 20, and one second cut 31 is provided in the approximate center of the band-shaped portion 30 in the front-rear direction. Before the band-shaped portion 30 is torn off, the paths of the first cuts 11, 21, the second cut 31, and the third cuts 12, 22 are independent of each other without being connected, intersecting, or integrated. That is, the first cuts 11, 21, the second cut 31, and the third cuts 12, 22 are each configured as a separate body.

[0023] FIG. 2 is an enlarged view of a zipper structure 100 including one unit shown in FIG. 1. The first cuts 11 and 21, the second cuts 31, and the third cuts 12 and 22 have a predetermined path shape and arrangement. The third cut 12 is provided at a right front corner of one unit. One end 12a of the third cut 12 is located closer to the first direction than the other end 12b. The path of the third cut 12 extends from the one end 12a to the left (also referred to as the "second direction" opposite to the first direction), bends to the left front side at the middle, and reaches the other end 12b. The first cut 11 is provided closer to the second direction than the other end 12b of the third cut 12. One end 11a of the first cut 11 is located closer to the first direction than the other end 11b. The path of the first cut 11 extends from one end 11a to the left rear side and includes a turn-back portion 11c as an intermediate portion of the path. The next path extends from the turn-back portion 11c to the left front side and reaches the other end 11b. The third cut 12, which is the same as the one described above, is provided at the left front corner of the unit, which is located on the second direction side of the other end 11b of the first cut 11.

[0024] A first cut 21 is provided at a corner on the right rear side of one unit. One end 21a of the first cut 21 is located closer to the first direction than the other end 21b. The path of the first cut 21 extends from the one end 21a to the left front side and includes a turn-back portion 21c as an intermediate portion of the path. The subsequent path extends from the turn-back portion 21c to the left rear side and reaches the other end 21b. A third cut 22 is provided on the second direction side of the other end 21b of the first cut 21. One end 22a of the third cut 22 is located closer to the first direction than the other end 22b. The path of the third cut 22 extends from the one end 22a to the second direction, turns to the left rear side at the intermediate portion, and reaches the other end 22b. The same third cut 22 as described above is provided at a corner on the left rear side of one unit, closer to the second direction than the other end 22b of the third cut 22.

[0025] The second cut 31 is provided at the left end of one unit, approximately in the center in the front-rear direction. One end 31a of the second cut 31 is located forward of the other end 31b (i.e., on the side of the first break line 10). The other end 31b of the second cut 31 is located rearward of the one end 31a (i.e., on the side of the second break line 20). The path of the second cut 31 extends from the one end 31a in the second direction and includes a turn-back portion 31c as an intermediate portion of the path. The subsequent path extends from the turn-back portion 31c in the first direction to reach the other end 31b. The turn-back portion 31c has a tapered shape toward the second direction, and is located on the second direction side as viewed from the one end 31a and the other end 31b.

[0026] One end 31a of the second cut 31 is located on a first virtual line L1, which is a virtual line parallel to the left-right direction, i.e., the first direction. The other end 31b of the second cut 31 is located on a second virtual line L2, which is a virtual line parallel to the left-right direction, i.e., the first direction. The one end 31a and the other end 31b of the adjacent units are also located on the same first virtual line L1 and second virtual line L2, respectively. The band-shaped portion 30 is divided into a first region A1, a second region A2, and an intermediate region AM. The first region A1 is an area sandwiched between the first break line 10 and the first virtual line L1, and extends in the first direction. The second region A2 is an area sandwiched between the second break line 20 and the second virtual line L2, and extends in the first direction. The intermediate region AM is an area sandwiched between the first virtual line L1 and the second virtual line L2, and extends in the first direction.

[0027] The turn-back portion 11c of the first cut 11 is located in the middle region AM. The path of the first cut 11 extends from the turn-back portion 11c to one end 11a and the other end 11b across the first virtual line L1. That is, the path of the first cut 11 extends from the middle region AM to the first region A1 so as to straddle the first virtual line L1. The turn-back portion 21c of the first cut 21 is located in the middle region AM. The path of the first cut 21 extends from the turn-back portion 21c to one end 21a and the other end 21b across the second virtual line L2. That is, the path of the first cut 21 extends from the middle region AM to the second region A2 so as to straddle the second virtual line L2.

[0028] One end 11a of the first cut 11 is located on a third virtual line L3, which is a virtual line parallel to the left-right direction, i.e., the first direction. One end 21a of the first cut 21 is located on a fourth virtual line L4, which is a virtual line parallel to the left-right direction, i.e., the first direction. The one ends 11a and 21a of adjacent units are also located on the same third virtual line L3 and fourth virtual line L4, respectively. In addition, a fifth virtual line L5 is defined, which extends from the one end 11a of the first cut 11 as a starting point. The angle B1 between the fifth virtual line L5 and the third virtual line L3 on the right front side is set to 45 degrees, but is not limited to this and can be 0 degrees or more and 180 degrees or less. In addition, a sixth virtual line L6 is defined, which extends from the one end 21a of the first cut 21 as a starting point. The angle B2 between the sixth virtual line L6 and the fourth virtual line L4 on the right rear side is 45 degrees, but is not limited to this and may be between 0 degrees and 180 degrees.

[0029] The other end 12b of the third cut 12 is located on the fifth imaginary line L5. That is, the third cut 12 intersects with the fifth imaginary line L5 at the other end 12b. The other end 22b of the third cut 22 is located on the sixth imaginary line L6. That is, the third cut 22 intersects with the sixth imaginary line L6 at the other end 22b.

[0030] In the zipper structure 100 of this embodiment, the band-shaped portion 30 is torn off in the first direction (right direction). When the tearing is actually performed, the breakage deviating from each break line 10, 20 is also conceivable. The direction of the force deviating from each break line 10, 20 is the front direction and the rear direction perpendicular to the first direction, respectively. On the other hand, the force in the first direction is the largest because the person performing the tearing has the intention of tearing in the first direction. Therefore, when deviation actually occurs during tearing, it is considered that deviation is likely to occur in the area that is 45 degrees or less on the right front side and 45 degrees or less on the right rear side with respect to the first direction as viewed from each break line 10, 20. From the above, the positions of the third cuts 12, 22 are adjusted so that the breakage does not deviate continuously from one end 11a, 21a of the first cuts 11, 21. The angles B1 and B2 are each 45 degrees based on the above findings.

[0031] The position of each cut is also appropriately adjusted. As shown in FIG. 3(a), for example, when the second cut 31 is gripped and torn in the first direction, the break line extends from one end 31a and the other end 31b to the right. The break line from the one end 31a tends to be toward the right rear side, and the break line from the other end 31b tends to be toward the right front side. Here, if the interval between the second cut 31 and the adjacent cut is excessively large, the right end may taper and the break may be interrupted. In contrast, in this embodiment, as shown in FIG. 3(b), the interval between each cut is adjusted so that the break is not interrupted when the zipper structure 100 is torn in the first direction. Note that the smaller the interval between each cut, the more the number of cuts in the entire zipper structure 100 increases, and the strength tends to be smaller. For this reason, in this embodiment, the interval between each cut is adjusted to a range in which the break is not interrupted and strength can be ensured.

[0032] The zipper structure 100 of this embodiment is applied to, for example, a rectangular parallelepiped paper box 200, as shown in Fig. 4. As shown in Fig. 4(a), the zipper structure 100 can be provided at approximately the center in the front-rear direction of the top surface 210 of the paper box 200, from the left end to the right end of the top surface 210. When opening the paper box 200, one of the multiple second cuts 31 is selected and gripped.

[0033] As shown in FIG. 4(b), the strip 30 is torn off in the first direction starting from the selected second cut 31. At this time, the break progresses from the selected second cut 31 toward the first cuts 11, 21, and is continuously broken along the first cuts 11, 21 through the third cuts 12, 22. The break line does not intersect with the unselected second cut 31, so that the break is prevented from being interrupted. The subsequent break reaches the right end of the top surface 210. After that, the remaining strip 30 is also torn off from the top surface 210, and the top surface 210 is separated into the first surface 211 including the first break line 10 and the second surface 212 including the second break line 20. With the above, the opening of the paper box 200 is completed.

[0034] As described above, according to the zipper structure 100 of the first embodiment, the band-shaped portion 30 is provided with the second cut 31. The folded back portion 31c of the path of the second cut 31 is located on the second direction side as viewed from the one end 31a and the other end 31b. Therefore, the folded back portion 31c can be raised like a flap toward the first direction side and grasped with the one end 31a and the other end 31b as fulcrums. In addition, a plurality of the second cuts 31 are provided along the first direction in the middle between both ends of the band-shaped portion 30. When the band-shaped portion 30 is to be torn off, one of the second cuts 31 can be selected and used as a starting point for tearing off while grasping the second cut 31. Starting from the selected second cut 31, the band-shaped portion 30 is guided by the first cuts 11 and 21 and torn off in the first direction. In this way, according to the zipper structure 100 of the first embodiment, the band portion 30 can be torn off starting from any part other than both ends of the band portion 30.

[0035] In the first embodiment, the band-shaped portion 30 defines a first region A1, a second region A2, and an intermediate region AM. One end 31a and the other end 31b of the second cut 31 are located on the first virtual line L1 and the second virtual line L2, respectively. The path of the first cut 11 extends from the intermediate region AM to the first region A1 so as to straddle the first virtual line L1. The path of the first cut 21 extends from the intermediate region AM to the second region A2 so as to straddle the second virtual line L1. Therefore, the breakage progresses from one end 31a of the second cut 31 in the first direction, and the breakage can be smoothly connected to the first cut 11. Also, the breakage progresses from the other end 31b of the second cut 31 in the first direction, and the breakage can be smoothly connected to the first cut 21.

[0036] In the first embodiment, the first ends 11a, 21a of the first cuts 11, 21 are located on the third virtual line L3 and the second virtual line L4, respectively. A fifth virtual line L5 is defined starting from the first end 11a of the first cut 11 and extending to the right front side from the first end 11a. An angle B1 between the fifth virtual line L5 and the third virtual line L3 on the right front side is 0 degrees or more and 180 degrees or less. A sixth virtual line L6 is defined starting from the first end 21a of the first cut 21 and extending to the right rear side from the first end 21a. An angle B2 between the sixth virtual line L6 and the fourth virtual line L4 on the right rear side is 0 degrees or more and 180 degrees or less. The other end 12b of the third cut 12 is located on the fifth virtual line L5. That is, the third cut 12 intersects with the fifth virtual line L5 at the other end 12b. The other end 22b of the third cut 22 is located on the sixth virtual line L6. That is, the third cut 22 intersects with the sixth virtual line L6 at the other end 22b. Therefore, the break progresses from one end 11a of the first cut 11 in the first direction, and is relayed by the third cut 12 before the break deviates from the first direction. Also, the break progresses from one end 21a of the first cut 21 in the first direction, and is relayed by the third cut 22 before the break deviates from the first direction. Therefore, it is possible to suppress the break deviating from the first direction and being interrupted.

[0037] In particular, in the first embodiment, the first cuts 11, 21 and the second cuts 31 are configured as separate bodies. This improves the degree of freedom in the path shapes and arrangement of the first cuts 11, 21 and the second cuts 31.

[0038] <Second embodiment> Next, a second embodiment will be described. Fig. 5 is a plan view showing a zipper structure 100 according to a second embodiment of the present invention. The second embodiment differs from the first embodiment in that the second cut 31 and the first cut 21 are integrally formed and the path shape of the third cut 12 is changed. Only the differences between the first embodiment and the second embodiment will be described below.

[0039] As shown in Fig. 6 corresponding to Fig. 2, in the second cut 31 of the second embodiment, one end 31a is located to the left front side of the other end 31b. A folded-back portion 31c in the middle part of the path of the second cut 31 extends rearward on the second direction side as seen from the other end 31b. The second cut 31 also functions as the first cut 21. The path shape of the third cut 12 is formed by a straight line from one end 12a to the other end 12b.

[0040] According to this, the breakage progresses in the first direction from the other end 31b of the second cut 31, and the breakage can be smoothly connected to the adjacent third cut 22. Moreover, the breakage progresses in the first direction from one end 31a of the second cut 31, and the breakage can be smoothly connected to the first cut 11, as in the first embodiment. From the above, as in the first embodiment, the zipper structure 100 according to the second embodiment also makes it possible to tear off the band portion 30 from any position other than both ends of the band portion 30 as a starting point.

[0041] In particular, in the second embodiment, the first cut 21 in the second break line 20 is configured integrally with the second cut 31, and the first cut 11 in the first break line 10 is configured separately from the second cut 31. Therefore, since the cuts are integrated, the configuration of the zipper structure 100 can be simplified, and, for example, the manufacturing cost can be reduced.

[0042] The shapes, materials, etc. of the components in the zipper structure 100 of each of the above embodiments may be within the scope of the claims, and are not limited to those of the above embodiments.

[0043] In the zipper structure 100 of each of the above-mentioned embodiments, the path shape of the first cuts 11, 21 is a broken line shape. Alternatively, as shown in Figures 7(a) and 7(b), for example, the turn-back portions 11c, 21c may have a curved shape, or the path of the first cuts 11, 21 may have a straight line shape without having a turn-back portion.

[0044] In the zipper structure 100 of each of the above-mentioned embodiments, the folded-back portion 31c as the intermediate portion of the second cut 31 has a tapered shape facing the second direction by a folding line. Alternatively, as shown in Fig. 7(c) and Fig. 7(d), for example, the folded-back portion 31c may have a curved shape, and the second cut 31 may have a substantially rectangular shape. Also, as shown in Fig. 7(e), for example, a sticker 40 or the like may be attached to make the second cut 31 easier to grip.

[0045] In the zipper structure 100 of each of the above-mentioned embodiments, each cut is formed as a separate body or as a partly integrated body. Alternatively, as shown in Fig. 8(a), for example, the first cuts 11, 21 and the third cuts 12, 22 may be integrated, and only the second cut 31 may be formed as a separate body. As shown in Fig. 8(b), for example, the first cuts 21, the second cuts 31 and the third cuts 22 may be integrated, and the first cuts 11 and the third cuts 12 may be integrated. As shown in Fig. 8(c), for example, the first cuts 11, 21 and the third cuts 12, 22 may be integrated, and the second cut 31 may be integrated thereto. [Explanation of symbols]

[0046] 100... zipper structure, 210... top surface, 211... first surface, 212... second surface, 10... first break line, 11... first cut, 11a... one end, 11b... other end, 12... third cut, 12a... one end, 12b... other end, 20... second break line, 21... first cut, 21a... one end, 21b... other end, 22... third cut, 22a... one end, 2 2b...other end, 30...band-shaped portion, 31...second cut, 31a...one end, 31b...other end, 31c...folded-back portion, A1...first region, A2...second region, AM...middle region, B1...angle, B2...angle, L1...first virtual line, L2...second virtual line, L3...third virtual line, L4...fourth virtual line, L5...fifth virtual line, L6...sixth virtual line

Claims

1. Two break lines provided on a predetermined surface; a strip-shaped portion that is sandwiched between the two break lines, extends in a first direction that is a break direction, and is configured to be torn off from the surface in the first direction; At least a zipper structure for separating the surface into a first surface including a first break line that is one of the break lines and a second surface including a second break line that is the other of the break lines when the band-shaped portion is torn off in the first direction, The first break line and the second break line include at least a plurality of first cuts having a continuous path from one end to the other end, the first cuts being configured to guide tearing of the strip in the first direction; The band portion includes at least a second cut having a continuous path from one end to the other end, the second cut including a turn-back portion as an intermediate portion of the path on a second direction side opposite to the first direction as viewed from the one end, and the second cut being configured to have the other end of the path on the first direction side as viewed from the turn-back portion; When the band-shaped portion is torn off, one of the plurality of second cuts is selected, and the selected second cut becomes a starting point for tearing off the band-shaped portion in the first direction; The first cut in one of the two break lines is The second cut is integral with the second cut, The first cut in the other of the two break lines is The second cut is configured separately. Zipper construction.

2. 2. The zipper structure of claim 1, The second cut is The one ends are located closer to the first break line than the other ends and are located on a first virtual line that is a virtual line parallel to the first direction, the other ends are each located closer to the second break line than the one ends and on a second virtual line that is a virtual line parallel to the first direction, The band portion further includes: a first region that is sandwiched between the first break line and the first virtual line and extends in the first direction; a second region that is sandwiched between the second break line and the second virtual line and extends in the first direction; an intermediate region that is sandwiched between the first virtual line and the second virtual line and extends in the first direction; Equipped with The first cut is a zipper structure configured such that a portion of the path at the first cut of the first break line extends from the intermediate region to the first region so as to straddle the first imaginary line, and / or a portion of the path at the first cut of the second break line extends from the intermediate region to the second region so as to straddle the second imaginary line.

3. The zipper structure according to claim 1 or 2, The first cut is the one end of the first break line at the first cut is located on the first direction side of the other end of the first break line at the first cut, and is located on a third virtual line that is a virtual line parallel to the first direction; the one end of the first cut of the second break line is located on the first direction side of the other end of the first cut of the second break line and is configured to be located on a fourth virtual line that is a virtual line parallel to the first direction, A cut having a continuous path from one end to the other, The pathway is A fifth virtual line that starts from the one end of the first cut of the first break line and extends toward the first direction as viewed from the one end of the first cut of the first break line, and that forms an acute angle with the third virtual line on the first direction side; and a sixth virtual line that starts from the one end of the first cut of the second break line and extends toward the first direction as viewed from the one end of the first cut of the second break line, and that forms an acute angle with the fourth virtual line on the first direction side; The zipper structure further comprises a third cut configured to intersect with at least one of the first cut and the second cut.

Images