JP2018203325A - Paper-made-box zipper and paper-made-box cutting line - Google Patents

Abstract

To provide a cutting structure which has good appearance of a blank cutting line after cutting and in which a zipper and a cutting line can be easily broken in a cutting structure of the zipper and the cutting line for a paper-made box.SOLUTION: A zipper A includes a cutting line constituted by plural notches 10 and a cutting line constituted by plural notches symmetrical to the notches 10. The notch 10 includes a straight line part 12, a curved line part 14, a curved line part 16 and an elongation part 18. An end part m11 is positioned on a virtual straight line 10E which passes through a contact point m14 and an end part m15, the straight line part 12 is formed as inclined to the direction of the virtual straight line 10E, and the curved line parts 14 and 16 are formed as arc-shaped or elliptical-arc-shaped. An angle α12 is formed larger than 90° and an angle α11 is formed smaller than 45°. The cutting line as a cutting structure is constituted by one of the cutting line constituted by the plural notches 10 or the cutting line constituted by the plural notches symmetrical to the notches 10.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a cutting structure for a paper box such as a cardboard box, and relates to a zipper and a score line for a paper box.

  Conventionally, the shape shown in FIG. 42 is widely known as the shape of the zipper for paper boxes.

  That is, the zipper U shown in FIG. 42 has cut lines U1 and U2 formed in two rows in parallel with each other, and a cut U3 for forming a piece 530 at the opening start position. The zipper U is formed on a sheet-like blank (for example, cardboard or cardboard) that constitutes a paper box.

  Here, the cut line U1 is formed by arranging a plurality of cuts 510 in a line at intervals, and each cut 510 has a straight part 512 formed in the opening direction (X1-X2 direction) and a straight part 512. And an inclined portion 514 that is linearly formed to be inclined inward from the front end (X1 side) of the opening direction, and an inner angle α510 formed by the straight portion 512 and the inclined portion 514 is an obtuse angle. ing. In each notch 510, the straight part 512 is formed on the same straight line.

  The cut line U2 includes a plurality of cuts 520 arranged in a row at intervals, and each cut 520 includes a straight part 522 formed in the opening direction and an end of the straight part 522 on the X1 side. It has an inclined portion 524 that is inclined inward and formed in a straight line, and an inner angle α520 formed by the straight portion 522 and the inclined portion 524 is an obtuse angle. In each notch 520, the straight line part 522 is formed on the same straight line.

  The cut line U1 and the cut line U2 are formed symmetrically with respect to the opening line center line Uh between the cut line U1 and the cut line U2, and the cut 510 and the cut 520 are formed to face each other. .

  In addition, the cut U3 has a substantially U-shape, and has a substantially U-shape opened to the X2 side. That is, the cut U3 includes a straight cut 532 formed on the extended line of the straight portion 512, a straight cut 534 formed on the extended line of the straight portion 522, and the X1 side ends of the cut 532 and the cut 534. And a notch 536 that connects the sections and is perpendicular to the center line Uh. A region surrounded by the cut U3 (that is, a region surrounded by a straight line connecting the cut U3 and the X2 side end of the cut 532 and the X2 side end of the cut 534) is a piece 530.

  In other words, in the zipper U, the belt 540 between the cut line U1 and the cut line U2 is pulled by raising the one part 530, grasping it by hand, and pulling in the X2 direction, and adjacent to the gap between the adjacent cuts 510. The gap between the notches 520 is broken and the zipper U is separated from the blank.

  As the shape of the carton zipper shown in Patent Document 1, the shape shown in FIG. 44 is also known.

  That is, the zipper V shown in FIG. 44 has cut lines V1 and V2 formed in two rows in parallel with each other, and a cut V3 for forming a piece 630 at the opening start position. The zipper V is formed on a sheet-like blank (for example, cardboard or cardboard) that constitutes a carton.

  Here, the cut line V1 is formed by arranging a plurality of cuts 610 in a line at intervals, and each cut 610 has a Y-shape. That is, the notch 610 is formed in a straight line inclined from the straight part 612 formed in the opening direction (X1-X2 direction) and the end of the straight part 612 on the front side (X1 side) in the opening direction. An inclined portion 614 and an inclined portion 616 formed in a straight line by inclining inward from the end portion on the X1 side of the straight portion 612, and an angle α614 formed by the straight portion 612 and the inclined portion 614, The angle α616 formed by the straight line portion 612 and the inclined portion 616 is an obtuse angle.

  The cut line V2 is a plurality of cuts 620 arranged in a row at intervals, and each cut 620 has a Y-shape. That is, the notch 620 is formed in a straight line with a straight line portion 622 formed in the opening direction (X1-X2 direction) and a slanted outward from the front end (X1 side) of the straight line portion 622 in the opening direction. An inclined portion 624 and an inclined portion 626 that is formed in a linear shape by inclining inward from the end portion on the X1 side of the linear portion 622, and an angle α 624 formed by the linear portion 622 and the inclined portion 624, The angle α626 formed by the straight line part 622 and the inclined part 626 is an obtuse angle.

  In addition, the cut V3 has a substantially U-shape, and has a substantially U-shape opened on the X2 side. That is, the cut V3 includes a straight cut 632 formed on the extended line of the straight portion 612, a straight cut 634 formed on the extended line of the straight portion 622, and the X1 side ends of the cut 632 and the cut 634. And a notch 636 that connects the sections and is perpendicular to the center line Vh. A region surrounded by the cut V3 (that is, a region surrounded by a straight line connecting the cut V3 and the X2 side end of the cut 632 and the X2 side end of the cut 634) is a piece 630.

  That is, in the zipper V, the strip portion 640 between the cut line V1 and the cut line V2 is pulled by raising the one part 630, grasping it by hand, and pulling in the X2 direction, and adjacent to the gap between the adjacent cuts 610. The gap between the notches 620 is broken and the zipper Q is separated from the blank.

  Further, the applicant has filed an application of Patent Document 2, and as a zipper in Patent Document 2, for example, there is a zipper A ″ shown in FIG. 46, and the zipper A ″ comprises a plurality of cuts 10. The incision 10 and the incision 20 are formed symmetrically with each other, and the incision 10 includes the first inclined portion 12, the second inclined portion 14, and the straight portion 16. The straight portion 16 is formed along the zipper opening direction, and the end portion m11 and the contact point m12 are disposed on both sides via the extension line e16 on the front side of the straight portion 16, and the rear side of the straight portion 16 The extension line f16 intersects with the first inclined portion 12 of the next cut 10, the angle α11 is formed larger than the angle α12, and the angle α13 is formed to be a right angle or less.

Japanese Patent Laid-Open No. 11-79242 JP-A-2006-74477

  However, in the zipper U shown in FIG. 42, when the zipper U is broken in the opening direction, there is a problem that the breaking force diffuses outward and causes peeling. That is, taking the cut line U1 as an example, the breaking force from the rear end of the straight line portion 512 diffuses in the range of the angle range β from the rear end of the straight line portion 512, but the band portion between the cut line U1 and the cut line U2 540 pulls and breaks, so there are many components that go inward rather than on the extended line of the straight part 512, but although it is easy to receive the breaking force at the inclined part 514, the component of the breaking force that goes outward depending on how the belt-like part is pulled In some cases, the center of the breaking force is directed outward, so that the breaking force that is not received by the inclined portion 514 of the next notch 510, that is, the breaking force toward the outside, causes peeling of the paper material constituting the blank. As shown in FIG. 43, strips 540a, 540b, and 540c are generated along the cutting line with the blank in the band-shaped portion 540 after the zipper U is broken. , The strip portion 540 of the release strip along the cutting line 552, 554 in the blank after separating 550a, 550b, would be 550c occurs, the appearance of the cut line in the blank is poor.

  In the zipper V shown in FIG. 44, the breaking force from the rear end of the straight portion 612 (622) can be received by the inclined portions 614 (624) and 616 (626) of the next cut 610 (620). Although the problem of peeling as in the case of the zipper U in FIG. 31 is small, the blank opening 650 formed by separating the zipper V is formed along one cutting line as shown in FIG. Since the inclined portion 614 remains and the inclined portion 624 remains along the other cutting line, the remaining inclined portion 614 and the broken line 614 from the base end of the inclined portion 614 along one cutting line 652 are left. 1 is a state in which a piece 618 having a side as 1 is hung around a broken line 614-1, and along the other cutting line 654, a remaining inclined part 624 and a bent line from the base end of the inclined part 624 Since the support sections 628 and 24-1 and the side portion is in a state of wandering around the polygonal line 624-1, the appearance of the cut line in the blank is poor. That is, since the inclined portion 614 forms an obtuse angle with respect to the straight portion 612 and the inclined portion 624 forms an obtuse angle with respect to the straight portion 622, the pieces 618 and 628 are easily formed together with the polygonal lines 614-1 and 624-1. There's a problem.

  In addition, in the zipper A ″ shown in FIG. 46, the end portion m11 and the contact point m12 are arranged on both sides via the extension line e16 that forms the zipper opening direction, so that the breaking line from the straight portion 16 is When formed on the end m11 side of the tip of the first inclined portion 12, as shown in FIG. 47, the side along the breaking line K16 from the straight portion 16 and the side along the first inclined portion 12 The projecting portion T1 is formed by the portion, or the projecting portion T2 is formed by the side portion along the breaking line K26 from the straight portion 26 and the side portion along the first inclined portion 22, and the blank There is a problem that the cutting line looks bad.

  Further, since the zipper U may be peeled as described above, there is a problem that the zipper U cannot be smoothly broken when the belt-like portion 540 is pulled and broken.

  Further, in the zipper V, the breaking force from the straight portions 612 and 622 has a large component toward the inner inclined portion (that is, the inclined portions 616 and 626) (that is, the center of the breaking force is directed to the inner inclined portion). However, depending on how the band-shaped portion 640 is pulled, the center of the breaking force may be directed toward the outer inclined portion (inclined portions 614 and 624) or in the direction of the linear portion 612. The feeling of breaking the gaps between the cuts 610 and the gaps between adjacent cuts 620 is different, and there is a problem that when the band-like portion 640 is pulled and broken, it cannot be broken smoothly. That is, when the center of the breaking force is directed to the inclined portions 614, 616, 624, and 626, a slight impact is felt when the breaking force reaches these inclined portions, but the center of the breaking force is the straight portion 612. When facing in the direction of (2), since such an impact is hardly felt, it cannot be smoothly broken.

  Therefore, the problems to be solved by the present invention are that the cutting line of the blank after cutting has a good appearance in the zipper for paper boxes and the cut structure of the cut line, and the zipper and the cut line are smoothly broken. It is to provide a cutting structure that can.

  The present invention was created to solve the above-mentioned problems. First, a paper box zipper used for a paper box formed by a sheet-like paper blank, Having a cut line and a second cut line, the zipper opening direction is linear, and the first cut line is formed by arranging a plurality of first cuts (10) in a row at intervals; The second cut line is formed by arranging a plurality of second cuts (20) in a row at intervals, and each of the first cut and the second cut includes a straight portion (12, 22) and a straight portion. The first curve portion (14, 24) formed from the first contact point (m12, m22) which is one end portion and the second end portion which is the opposite end of the first curve portion from the first contact point. The second curve portion (16, 26) formed from the contact points (m13, m23) and the end of the second curve portion opposite to the second contact point And the extended portion (18, 28) formed from the third contact point (m14, m24), and in each of the first cut and the second cut, the straight portion is the other end of the straight portion. A straight line is formed between the first end (m11, m21) and the first contact point, a first curved part is formed in a curved line between the first and second contact points, and a second curved part is formed. The second end portion (m15, which is formed in a curved shape between the second contact point and the third contact point, and the extending portion is an end portion on the opposite side of the third contact point and the third contact point of the extending portion. m25) is formed in a straight line shape, the extending portion is formed in the zipper opening direction, and the first end portion is a virtual straight line in the zipper opening direction and passes through the third contact point and the second end portion (10E, 20E). ) And the straight portion is virtually straight so that the first end portion is located in front of the first contact point in the zipper opening direction. The first curved portion is formed in a bending direction that is bent toward the zipper opening direction in the bending direction from the first contact point to the linear portion direction, and the second curved portion is The second contact point is formed in a bending direction opposite to the bending direction of the first curved portion from the two contact points, the first contact point is located in front of the second contact point in the zipper opening direction, and the second contact point is the third contact point. It is located in the front side in the zipper opening direction from the contact point, and the second cut line is formed in a symmetrical shape via the center line between the first cut line and the plurality of first cuts and the plurality of second cuts The first cut and the second cut corresponding to each other are in a state where the first contact point is outside the first end (the length between the straight line of the first cut and the straight line of the second cut is in the zipper opening direction). Even in a state that becomes longer as it goes to the rear side The first cut and the second cut are formed symmetrically with respect to the center line so as to face each other.

  In the first configuration, the first end is located on the imaginary straight line, the extending portion is on the imaginary straight line, and the breaking force from the extending portion is easily transmitted to the first end, Even when the center of the breaking force from the rear end of the stretched portion faces outward, the straight portion and the first curved portion are provided, so that the breaking force can be received, so that the zipper can be broken smoothly. Can improve the appearance of the cut surface.

  Further, the first end portion is located on the virtual straight line, and the extending portion is on the virtual straight line, and the breaking force from the extending portion is easily transmitted to the first end portion. Since the two cuts are formed in a protruding shape by the straight line portion, the first curved portion and the second curved portion, the appearance of the cut surface can be improved.

  Second, in the first configuration, the first curved portion and the second curved portion are formed in an arc shape or an elliptical arc shape.

  Third, in the first or second configuration, an extension line (12E, 22E) from the first contact point of the straight line portion and a tangent line (12E, 22E) at the second contact point of the first curve portion. The angle (α12, α22) on the first curve portion side is formed to be larger than 90 degrees.

  In the third configuration, the angle between the extended line from the first contact point of the linear portion and the tangent line at the second contact point of the first curved portion, and the angle on the first curved portion side is more than 90 degrees. Since it is formed large, the breaking force from the straight portion can be smoothly transmitted to the extending portion, and thus the zipper can be smoothly broken.

  Fourth, in any one of the first to third configurations, an acute angle between the straight line portion and the virtual straight line is smaller than 45 degrees. In the fourth configuration, since the acute angle between the straight portion and the virtual straight line is smaller than 45 degrees, the impact when the breaking force from the previous cut is transmitted to the straight portion is extremely small. The zipper can be broken smoothly.

  Further, fifthly, in any of the first to fourth configurations, the first curved portion in the range from the first end portion to the third contact point in each of the first cut and the second cut. The sum of the length (L12, L22) along the zipper opening direction and the length (L13, L23) along the zipper opening direction of the second curved portion is the length (L11) along the zipper opening direction of the linear portion , L21).

  In the fifth configuration, in the range from the first end to the third contact point, the sum of the length along the zipper opening direction of the first curved portion and the length along the zipper opening direction of the second curved portion is Since the straight portion is longer than the length along the zipper opening direction, unevenness in the cut can be made inconspicuous, and the zipper can be smoothly broken by smoothly transmitting the breaking force to the extending portion.

  In addition, as a 5-1 configuration, in any of the first to fifth configurations described above, in each of the first cut and the second cut, the tangent at the first contact point of the first curved portion is a straight portion. The tangent line of the first curve portion at the second contact point overlaps with the tangent line of the second curve portion at the second contact point, and the tangent line of the second curve portion at the third contact point overlaps with the extended portion. It is good also as what. Thereby, in the boundary of each part which comprises cutting, the direction in cutting can be switched smoothly and a zipper can be broken smoothly.

  Further, as the 5-2 configuration, in any one of the first to fifth configurations and the 5-1 configuration, the third contact point and the second cut in each of the first cut and the second cut. The length (L14, L24) along the virtual straight line between the two ends is 30% or more and 50% or less of the length (L10, L20) along the virtual straight line between the first end and the second end. It may be characterized by being.

  The sixth is a paper box cut line used for a paper box formed by a sheet-like paper blank, the cut line opening direction is linear, and the paper box cut line is A plurality of cuts (10, 20) are arranged in a row at intervals, and the cuts are straight portions (12, 22) and the first contact point (m12, one end of the straight portion). m2) formed from the first curved portion (14, 24) formed from m22) and the second contact point (m13, m23) which is the end of the first curved portion opposite to the first contact point. It has an extended portion (18, 28) formed from a curved portion (16, 26) and a third contact point (m14, m24) which is the end of the second curved portion opposite to the second contact point. The straight line portion is linearly formed between the first end (m11, m21), which is the other end of the straight line portion, and the first contact point, and the first curved portion The second contact point is formed in a curved shape between the first contact point and the second contact point, the second curved portion is formed in an arc shape or a curved shape between the second contact point and the third contact point, and the extending portion is formed in the third shape. A straight line is formed between the contact point and the second end part (m15, m25) which is the end part opposite to the third contact point of the extension part, the extension part is formed in the cut line opening direction, and the first end Is located on an imaginary straight line (10E, 20E) passing through the third contact point and the second end portion in a virtual straight line in the opening direction of the cut line, and the first end portion of the straight line portion is cut more than the first contact point. It is formed to be inclined with respect to the direction of the imaginary straight line so as to be positioned on the front side in the line opening direction, and the first curved portion is bent toward the cut line opening direction side in the bending direction with respect to the direction of the linear portion from the first contact point. It is formed in the bending direction, and the second curved portion is bent in the direction opposite to the bending direction of the first curved portion from the second contact point. The first contact point is located on the front side in the cut line opening direction with respect to the second contact point, and the second contact point is located on the front side in the cut line opening direction with respect to the third contact point. Features.

  In the sixth configuration, the first end is located on the imaginary straight line, the extending portion is on the imaginary straight line, and the breaking force from the extending portion is easily transmitted to the first end, Even when the center of the breaking force from the rear end of the stretched portion is directed outward, the straight line portion and the first curved portion are provided, so that the breaking force can be received, so the paper box cut line can be smoothly smoothed. Can be broken and the appearance of the cut surface can be improved.

  Further, the first end portion is located on the virtual straight line, and the extending portion is on the virtual straight line, and the breaking force from the extending portion is easily transmitted to the first end portion. Since the two cuts are formed in a protruding shape by the straight line portion, the first curved portion and the second curved portion, the appearance of the cut surface can be improved.

  Seventhly, in the sixth configuration, the first curved portion and the second curved portion are formed in an arc shape or an elliptical arc shape.

  Eighth, in the sixth or seventh configuration, an extension line (12E, 22E) from the first contact point of the straight line portion and a tangent line (12E, 22E) at the second contact point of the first curved portion. The angle (α12, α22) on the first curve portion side is formed to be larger than 90 degrees.

  In the eighth configuration, the angle between the extended line from the first contact point of the linear part and the tangent line at the second contact point of the first curved part, and the angle on the first curved part side is more than 90 degrees Since it is formed large, the breaking force from the straight portion can be smoothly transmitted to the extending portion, and thus the paper box break line can be smoothly broken.

  Ninth, in any of the sixth to eighth configurations, an acute angle between the straight line portion and the virtual line may be smaller than 45 degrees.

  In the ninth configuration, since the acute angle between the straight portion and the virtual straight line is smaller than 45 degrees, the impact when the breaking force from the previous cut is transmitted to the straight portion is extremely small. The cut line for paper boxes can be broken smoothly.

  Tenth, in any one of the sixth to ninth configurations, the length (in the range from the first end portion to the third contact point) along the cut line opening direction of the first curved portion ( L12, L22) and the sum of the length (L13, L23) along the cut line opening direction of the second curved portion is longer than the length (L11, L21) along the cut line opening direction of the straight line portion. Features. Thereby, in the boundary of each part which comprises cutting, the direction in cutting can be switched smoothly and a zipper can be broken smoothly.

  In the tenth configuration, in the range from the first end portion to the third contact point, the sum of the length along the zipper opening direction of the first curved portion and the length along the zipper opening direction of the second curved portion is Since the length of the straight part is longer than the zipper opening direction, unevenness in the incision can be made inconspicuous, and the breaking force can be smoothly transmitted to the stretched part, thereby smoothly breaking the cut line for paper boxes. can do.

  As the 10th configuration, in any one of the sixth to tenth configurations, the tangent line at the first contact point of the first curved portion overlaps the straight line portion, and the first curve at the second contact point. The tangent of the second portion may overlap with the tangent of the second curved portion at the second contact point, and the tangent of the second curved portion at the third contact point may overlap with the extended portion. Thereby, in the boundary of each part which comprises a cut, the direction in a cut can be switched smoothly and a cut line can be broken smoothly.

  Further, as the 10-2 configuration, in any of the 6th to 10th configurations and the 10th configuration, in the incision, a virtual straight line between the third contact point and the second end is formed. The length along the length (L14, L24) is not less than 30% and not more than 50% of the length (L10, L20) along the imaginary straight line between the first end and the second end. Also good.

  The eleventh is a paper box zipper used for a paper box formed by a sheet-like paper blank, and has a first cut line and a second cut line, and the zipper opening direction is curved. The first cut line is formed by arranging a plurality of first cuts (10) in a row with intervals, and the second cut line has a plurality of second cuts (20) through the intervals. The first cut and the second cut are each formed from a straight line portion (12, 22) and a first contact point (m12, m22) which is one end of the straight line portion. The second curve portion (16, 24) formed from the first curve portion (14, 24) thus formed and the second contact point (m13, m23) which is the end of the first curve portion opposite to the first contact point. , 26) and the third contact point (m14, m24) which is the end of the second curved portion opposite to the second contact point. It has an extension part (18, 28), and in each of the 1st cut and the 2nd cut, a straight part is between the 1st end (m11, m21) which is the other end of a straight part, and the 1st contact point. The first curved portion is formed in a curved shape between the first contact point and the second contact point, and the second curved portion is formed in a curved shape between the second contact point and the third contact point. The extension part is formed in a curved shape between the third contact point and the second end part (m15, m25) which is the end part opposite to the third contact point of the extension part, and the extension part is opened with a zipper The first end is a virtual curve in the zipper opening direction and is located on a virtual curve (11E, 21E) passing through the third contact point and the second end, and the straight end is the first end With respect to the tangent lines (15E, 25E) of the virtual curve at the first end so as to be located on the front side in the zipper opening direction from the first contact point The first curved portion is formed in a bending direction that bends toward the zipper opening direction in the bending direction from the first contact point to the linear portion direction, and the second curved portion is formed from the second contact point to the second contact point. It is formed in a bending direction opposite to the bending direction of one curved portion, the first contact point is located on the front side in the zipper opening direction from the second contact point, and the second contact point is zippered from the third contact point The first cut and the second cut corresponding to each other in the plurality of first cuts and the plurality of second cuts are located on the front side in the opening direction, and the first contact point is outside the first end (the first cut) The length between the straight line portion of the first cut and the straight line portion of the second cut may be longer toward the rear side in the zipper opening direction).

  In the eleventh configuration, the first end is located on the imaginary curve, and the extending portion is on the imaginary curve, and the breaking force from the extending portion is easily transmitted to the first end, Even when the center of the breaking force from the rear end of the stretched portion faces outward, the straight portion and the first curved portion are provided, so that the breaking force can be received, so that the zipper can be broken smoothly. Can improve the appearance of the cut surface.

  The first end portion is located on the virtual curve, and the extending portion is on the virtual curve, and the breaking force from the extending portion is easily transmitted to the first end portion. Since the two cuts are formed in a protruding shape by the straight line portion, the first curved portion and the second curved portion, the appearance of the cut surface can be improved.

  Twelfth, in the eleventh configuration, the first curved portion and the second curved portion are formed in an arc shape or an elliptical arc shape.

  In the thirteenth aspect, in the eleventh or twelfth configuration, an extension line (12E, 22E) from the first contact point of the straight line portion and a tangent line (12E, 22E) at the second contact point of the first curve portion. The angle (α12, α22) on the first curve portion side is formed to be larger than 90 degrees.

  In the thirteenth configuration, the angle between the extended line from the first contact point of the linear part and the tangent line at the second contact point of the first curved part, and the angle on the first curved part side is more than 90 degrees Since it is formed large, the breaking force from the straight portion can be smoothly transmitted to the extending portion, and thus the zipper can be smoothly broken.

  In the fourteenth aspect, in any of the eleventh to thirteenth configurations, the acute angle between the straight line portion and the tangent line (15E, 25E) of the virtual curve at the first end portion is greater than 45 degrees. Is also small.

  In the fourteenth configuration, when the acute angle between the straight line portion and the tangent line of the virtual curve at the first end is smaller than 45 degrees, the breaking force from the previous cut is transmitted to the straight line portion. The impact of the zipper is extremely small, so that the zipper can be broken smoothly.

  According to a fifteenth aspect, in any one of the eleventh to fourteenth configurations, in each of the first cut and the second cut, the first curved portion in a range from the first end portion to the third contact point. The sum of the length (L12, L22) along the zipper opening direction and the length (L13, L23) along the zipper opening direction of the second curved portion is the length (L11) along the zipper opening direction of the linear portion , L21).

  In the fifteenth configuration, in the range from the first end portion to the third contact point, the sum of the length along the zipper opening direction of the first curved portion and the length along the zipper opening direction of the second curved portion is Since the straight portion is longer than the length along the zipper opening direction, unevenness in the cut can be made inconspicuous, and the zipper can be smoothly broken by smoothly transmitting the breaking force to the extending portion.

As the 15th configuration, in any one of the eleventh to fifteenth configurations, in each of the first cut and the second cut,
The tangent line at the first contact point of the first curve portion overlaps with the straight line portion, the tangent line of the first curve portion at the second contact point overlaps with the tangent line of the second curve portion at the second contact point, and at the third contact point. The tangent line of the second curved portion may overlap the extended portion. Thereby, in the boundary of each part which comprises cutting, the direction in cutting can be switched smoothly and a zipper can be broken smoothly.

  Further, as the 15th configuration, in any one of the eleventh to fifteenth configurations and the 15th configuration, the third contact point and the second cut in each of the first cut and the second cut. The length (L14, L24) along the virtual curve between the two ends is 30% to 50% of the length (L10, L20) along the virtual curve between the first end and the second end. It may be characterized by being.

  The sixteenth aspect is a paper box cut line used for a paper box formed by a sheet-like paper blank, the cut line opening direction is curved, and the paper box cut line is A plurality of cuts (10, 20) are arranged in a row at intervals, and the cuts are straight portions (12, 22) and a first contact point (m12) that is one end of the straight portion. , M22) and the first curve portion (14, 24) formed from the first curve portion and the second contact point (m13, m23) which is the end of the first curve portion opposite to the first contact point. There are two curved portions (16, 26) and extended portions (18, 28) formed from third contact points (m14, m24) which are the ends of the second curved portion opposite to the second contact points. The straight portion is formed in a straight line between the first end (m11, m21), which is the other end of the straight portion, and the first contact point. The portion is formed in a curved shape between the first contact point and the second contact point, the second curved portion is formed in a curved shape between the second contact point and the third contact point, and the extending portion is formed in the third contact. The first end portion is formed in a curved shape between the second end portion (m15, m25) which is the end portion opposite to the third contact point of the extension portion and the extension portion, and the extension portion is formed in the direction of opening the cut line. Is located on the virtual curve (11E, 21E) passing through the third contact point and the second end portion in a virtual curve in the opening direction of the cut line, and the first end portion of the straight line portion is a cut line from the first contact point. It is formed to be inclined with respect to the tangent lines (15E, 25E) of the virtual curve at the first end so as to be positioned on the front side in the opening direction, and the first curve is bent from the first contact point toward the straight line. Is formed in a bending direction that bends in the direction of opening of the cut line in the direction, and the second curved portion is the first curve from the second contact point. Formed in a bending direction opposite to the bending direction of the portion, the first contact point is located on the front side in the opening direction of the cut line from the second contact point, and the second contact point is a cut line from the third contact point It is located on the front side in the opening direction.

  In the sixteenth configuration, the first end is located on the imaginary curve, and the extending portion is on the imaginary curve, and the breaking force from the extending portion is easily transmitted to the first end, Even when the center of the breaking force from the rear end of the stretched portion is directed outward, the straight line portion and the first curved portion are provided, so that the breaking force can be received, so the paper box cut line can be smoothly smoothed. Can be broken and the appearance of the cut surface can be improved.

  The first end portion is located on the virtual curve, and the extending portion is on the virtual curve, and the breaking force from the extending portion is easily transmitted to the first end portion. Since the two cuts are formed in a protruding shape by the straight line portion, the first curved portion and the second curved portion, the appearance of the cut surface can be improved.

  Seventeenth, in the sixteenth configuration, the first curved portion and the second curved portion are formed in an arc shape or an elliptical arc shape.

  Eighteenth, in the sixteenth or seventeenth configuration, an extension line (12E, 22E) from the first contact point of the straight line portion and a tangent line (12E, 22E) at the second contact point of the first curve portion. The angle (α12, α22) on the first curve portion side is formed to be larger than 90 degrees.

  In the eighteenth configuration, the angle between the extended line from the first contact point of the linear portion and the tangent line at the second contact point of the first curved portion, and the angle on the first curved portion side is more than 90 degrees Since it is formed large, the breaking force from the straight portion can be smoothly transmitted to the extending portion, and thus the paper box break line can be smoothly broken.

  In the nineteenth aspect, in any of the sixteenth to eighteenth configurations, the acute angle between the straight line portion and the tangent line (15E, 25E) of the virtual curve at the first end portion is more than 45 degrees. Is also small.

  In the nineteenth configuration, when the acute angle between the straight line portion and the tangent line of the virtual curve at the first end portion is smaller than 45 degrees, the breaking force from the previous cut is transmitted to the straight line portion. Thus, the paper box break line can be smoothly broken.

  Twenty, in any of the sixteenth to nineteenth configurations, in the range from the first end to the third contact point, the length along the opening direction of the cut line of the first curved portion ( L12, L22) and the sum of the length (L13, L23) along the cut line opening direction of the second curved portion is longer than the length (L11, L21) along the cut line opening direction of the straight line portion. Features.

  In the twentieth configuration, in the range from the first end portion to the third contact point, the sum of the length along the zipper opening direction of the first curved portion and the length along the zipper opening direction of the second curved portion is Since the length of the straight part is longer than the zipper opening direction, unevenness in the incision can be made inconspicuous, and the breaking force can be smoothly transmitted to the stretched part, thereby smoothly breaking the cut line for paper boxes. can do.

  As a twentieth configuration, in any one of the sixteenth to twentieth configurations, the tangent line at the first contact point of the first curved portion overlaps with the straight line portion, and the first curve at the second contact point. The tangent of the second portion may overlap with the tangent of the second curved portion at the second contact point, and the tangent of the second curved portion at the third contact point may overlap with the extended portion. Thereby, in the boundary of each part which comprises cutting, the direction in cutting can be switched smoothly and a zipper can be broken smoothly.

  Further, as the twentieth configuration, in any one of the sixteenth to twentieth configurations and the twentieth configuration, the imaginary curve between the third contact point and the second end portion is formed in the cutting. The length along the length (L14, L24) is not less than 30% and not more than 50% of the length (L10, L20) along the virtual curve between the first end and the second end. Also good.

  The 21st is a paper box zipper used for a paper box formed by a sheet-like paper blank, and has a first cut line and a second cut line, and the zipper opening direction is linear. The first cut line is formed by arranging a plurality of first cuts (10) in a row with intervals, and the second cut line has a plurality of second cuts (20) through the intervals. Each of the first cut and the second cut is a first straight portion (12, 22) and a first contact point (m12, one end of the first straight portion). m22) formed from the first curve portion (14, 24) formed from m2) and the second contact point (m13-1, m23-1) which is the end of the first curve portion opposite to the first contact point. The second straight line portion (15, 25) and the third contact point (m13-2, m) which is the end of the second straight line portion opposite to the second contact point. 3-2) formed from the second curved portion (16, 26) and the fourth contact point (m14, m24) which is the end of the second curved portion opposite to the third contact point. It has an extending portion (18, 28), and in each of the first cut and the second cut, the first straight portion is the first end (m11, m21) that is the other end of the first straight portion and the first cut A straight line is formed between one contact point, a first curved part is formed between the first contact point and the second contact point, and a second straight part is formed between the second contact point and the third contact point. The second curved portion is formed in a curved shape between the third contact point and the fourth contact point, and the extended portion is opposite to the fourth contact point of the third contact point and the extended portion. Are formed in a straight line between the second end portions (m15, m25), the extension portion is formed in the zipper opening direction, and the first end portion is a virtual straight line in the zipper opening direction. Is located on an imaginary straight line (10E, 20E) passing through the fourth contact point and the second end, and the first straight part is located on the front side in the zipper opening direction from the first contact point. The first curved portion is formed in a bending direction that is bent from the first contact point toward the zipper opening direction in the bending direction with respect to the first linear portion, In the straight line portion, the second contact point is positioned in front of the third contact point in the zipper opening direction, and the length from the second contact point to the virtual straight line is longer than the length from the third contact point to the virtual straight line. As described above, the second curved portion is formed to be inclined with respect to the direction of the imaginary straight line, and the first contact point is formed in a bending direction opposite to the bending direction of the first curved portion from the third contact point. Positioned forward in the zipper opening direction from the second contact point The third contact point is located on the front side in the zipper opening direction with respect to the fourth contact point, and the second cut line is formed in a symmetrical shape via the center line between the first cut line and The first cut and the second cut corresponding to each other in the first cut and the plurality of second cuts are in a state where the first contact point is outside the first end (the straight line portion and the second cut of the first cut). (The length between the straight portions may be longer toward the rear side in the zipper opening direction.) The first cut and the second cut are formed symmetrically via the center line so as to face each other. It is characterized by.

  In the twenty-first configuration, the first end is located on the imaginary straight line, and the extending portion is on the imaginary straight line, and the breaking force from the extending portion is easily transmitted to the first end, Even when the center of the breaking force from the rear end of the stretched portion is directed outward, the first straight portion and the first curved portion are provided, so that the breaking force can be received and the zipper is smoothly broken. And the appearance of the cut surface can be improved.

  Further, the first end portion is located on the virtual straight line, and the extending portion is on the virtual straight line, and the breaking force from the extending portion is easily transmitted to the first end portion. In the two cuts, since the first straight portion, the first curved portion, and the second curved portion are formed in a projecting shape, the appearance of the cut surface can be improved.

  Note that as a twenty-first configuration, in the twenty-first configuration, the first curved portion and the second curved portion may be formed in an arc shape or an elliptic arc shape.

  Further, as the 21-2 configuration, in the 21st or 21-1 configuration, an extension line (12E, 22E) from the first contact point of the first straight portion and a second contact point of the second straight portion. The angle (α12, α22) on the first curve portion side with respect to the extension line (15E, 25E) from the first side may be larger than 90 degrees.

  Further, as the 21st-3rd configuration, in the 21st, 21st-1 or 21-2th configuration, the acute angle between the first straight portion and the virtual straight line is smaller than 45 degrees. It may be a feature.

  Further, as the twenty-first configuration, in the twenty-first, twenty-first, twenty-first, or twenty-first or third configuration, the first notch and the second notch are each fourth from the first end. In the range up to the contact point, the sum of the length (L12, L22) along the zipper opening direction of the first curved portion and the length (L13, L23) along the zipper opening direction of the second curved portion is the first The length (L11, L21) along the zipper opening direction of the straight portion and the length (L15, L25) along the zipper opening direction of the second straight portion may be longer than the sum.

  Further, as the 21-5th configuration, in the 21st, 21st, 21st, 21-2, 21-3, or 21-4 configuration, in each of the first cut and the second cut, The tangent line at the first contact point of the curved portion overlaps the first straight line portion, the tangent line of the first curved portion at the second contact point overlaps with the second straight line portion, and the tangent line of the second curved portion at the third contact point is The tangent line of the second curved line portion at the fourth contact point overlaps with the second straight line portion and may overlap with the extended portion.

  In addition, as the 21st-6th configuration, in the 21st, 21st-1st, 21st-2th, 21st-3th, 21st-4th, 21st-5th configuration, the first cut and the second cut. In each, the length (L14, L24) along the virtual straight line between the fourth contact point and the second end is the length (L10, L20) along the virtual straight line between the first end and the second end. 30) or more and 50% or less.

  The 22nd is a paper box cut line used for a paper box formed by a sheet-like paper blank, the cut line opening direction is linear, and the paper box cut line is A plurality of cuts (10, 20) are arranged in a row at intervals, and the cuts are the first straight part (12, 22) and the first contact that is one end of the first straight part. The first curve portion (14, 24) formed from the point (m12, m22) and the second contact point (m13-1, m23-) that is the end of the first curve portion opposite to the first contact point. 1) formed from the second straight line portion (15, 25) and the third contact point (m13-2, m23-2) which is the end of the second straight line portion opposite to the second contact point. The second curved portion (16, 26) formed and the fourth contact point (m14, m24) which is the end of the second curved portion opposite to the third contact point. A first end portion (m11, m21) in which the first straight portion is the other end portion of the first straight portion in each of the first cut and the second cut. Between the first contact point and the first contact point, a first curved portion is formed in a curved shape between the first contact point and the second contact point, and a second straight portion is formed between the second contact point and the third contact point. It is formed linearly between the points, the second curved portion is formed in a curved shape between the third contact point and the fourth contact point, and the extended portion is the third contact point and the fourth contact point of the extended portion. It is formed in a straight line between the second ends (m15, m25), which are the opposite ends, the extending portion is formed in the cut line opening direction, and the first end is a virtual straight line in the cut line opening direction. It is located on a virtual straight line (10E, 20E) passing through the four contact points and the second end, and the first straight portion is located in the direction of opening the cut line from the first contact point. A bending direction formed so as to be inclined with respect to the direction of the imaginary straight line so as to be located on the front side, and the first curved part being bent toward the cut line opening direction in the bending direction from the first contact point to the direction of the first linear part The second straight line portion has a second contact point located on the front side in the opening direction of the cut line from the third contact point, and the length from the second contact point to the virtual straight line is virtual from the third contact point. The second curved portion is formed so as to be inclined with respect to the direction of the imaginary straight line so as to be longer than the length to the straight line, and the second curved portion is formed in a bending direction opposite to the bending direction of the first curved portion from the third contact point. The first contact point is located on the front side in the cut line opening direction with respect to the second contact point, and the third contact point is located on the front side in the cut line opening direction with respect to the fourth contact point.

  In the twenty-second configuration, the first end is located on the imaginary straight line, and the extending portion is on the imaginary straight line, and the breaking force from the extending portion is easily transmitted to the first end, Even when the center of the breaking force from the rear end of the stretched portion is directed outward, the first straight portion and the first curved portion are provided, so that the breaking force can be received. Can be smoothly broken, and the appearance of the cut surface can be improved.

  Further, the first end portion is located on the virtual straight line, and the extending portion is on the virtual straight line, and the breaking force from the extending portion is easily transmitted to the first end portion. In the two cuts, since the first straight portion, the first curved portion, and the second curved portion are formed in a projecting shape, the appearance of the cut surface can be improved.

  In addition, as a 22nd configuration, in the 22nd configuration described above, the first curved portion and the second curved portion may be formed in an arc shape or an elliptical arc shape.

  As the 22-2th configuration, in the above 22nd or 22-1th configuration, an extension line (12E, 22E) from the first contact point of the first straight line portion and a second contact point of the second straight line portion. The angle (α12, α22) on the first curve portion side with respect to the extension line (15E, 25E) from the first side may be larger than 90 degrees.

  Further, as a 22nd configuration, in the 22nd, 22-1 or 22-2 configuration, the acute angle between the first straight portion and the virtual straight line is smaller than 45 degrees. It may be a feature.

  Further, as a 22-4th configuration, in the 22nd, 22-1, 22-2, or 22-3 configuration, the first notch and the second notch are each fourth from the first end. In the range up to the contact point, the sum of the length (L12, L22) along the cut line opening direction of the first curved portion and the length (L13, L23) along the cut line opening direction of the second curved portion is, It is characterized by being longer than the sum of the length (L11, L21) along the cut line opening direction of the first straight line portion and the length (L15, L25) along the zipper opening direction of the second straight line portion. Also good.

  Further, as a 22-5th configuration, in the above 22nd, 22-1, 22-2, 22-3, or 22-4 configuration, the tangent at the first contact point of the first curved portion is The tangent line of the first curve portion at the second contact point overlaps with the first straight line portion, the tangent line of the second curve portion at the third contact point overlaps with the second straight line portion, and the fourth contact point. The tangent line of the second curved portion at the point may overlap with the extended portion.

  Further, as the 22-6th configuration, in the 22nd, 22-1, 22-2, 22-3, 22-4, or 22-5 configuration, in the cutting, the fourth contact point and The length (L14, L24) along the virtual straight line between the second ends is 30% or more and 50% or less of the length (L10, L20) along the virtual straight line between the first end and the second end. It is good also as what is characterized by being.

  The 23rd is a paper box zipper used for a paper box formed by a sheet-like paper blank, and has a first cut line and a second cut line, and the zipper opening direction is curved. The first cut line is formed by arranging a plurality of first cuts (10) in a row with intervals, and the second cut line has a plurality of second cuts (20) through the intervals. Each of the first cut and the second cut is a first straight portion (12, 22) and a first contact point (m12, one end of the first straight portion). m22) formed from the first curve portion (14, 24) formed from m2) and the second contact point (m13-1, m23-1) which is the end of the first curve portion opposite to the first contact point. The second straight line portion (15, 25) and the third contact point (m13-2, m) which is the end of the second straight line portion opposite to the second contact point. 3-2) formed from the second curved portion (16, 26) and the fourth contact point (m14, m24) which is the end of the second curved portion opposite to the third contact point. It has an extending portion (18, 28), and in each of the first cut and the second cut, the first straight portion is the first end (m11, m21) that is the other end of the first straight portion and the first cut A straight line is formed between one contact point, a first curved part is formed between the first contact point and the second contact point, and a second straight part is formed between the second contact point and the third contact point. The second curved portion is formed in a curved shape between the third contact point and the fourth contact point, and the extended portion is opposite to the fourth contact point of the third contact point and the extended portion. Are formed in a straight line between the second ends (m15, m25), which are the end portions of the zipper, the extension portion is formed in the zipper opening direction, and the first end portion is a virtual curve in the zipper opening direction. Is located on a virtual curve (11E, 21E) passing through the fourth contact point and the second end, and the first straight portion is located on the front side in the zipper opening direction from the first contact point. The first curved portion is inclined with respect to the tangent line (15E, 25E) of the virtual curve at the first end portion, and the first curved portion has a zipper opening direction in a bending direction from the first contact point to the first linear portion. The second straight line portion is formed in a bending direction that bends to the side, and the second contact point is located on the front side in the zipper opening direction from the third contact point, and the length from the second contact point to the virtual curve is third. The second curved portion is formed longer than the length from the contact point to the virtual curve, the second curved portion is formed in a bending direction opposite to the bending direction of the first curved portion from the third contact point, and the first contact point is the second Positioned in front of contact point in zipper opening direction The third contact point is located in front of the fourth contact point in the zipper opening direction, and the first cut and the second cut corresponding to each other in the plurality of first cuts and the plurality of second cuts are the first contact. The points are opposed to each other in a state where the points are outside the first end portion.

  In the twenty-third configuration, the first end is located on the virtual curve, and the stretched portion is on the virtual curve, and the breaking force from the stretched portion is easily transmitted to the first end, Even when the center of the breaking force from the rear end of the stretched portion is directed outward, the first straight portion and the first curved portion are provided, so that the breaking force can be received and the zipper is smoothly broken. And the appearance of the cut surface can be improved.

  The first end portion is located on the virtual curve, and the extending portion is on the virtual curve, and the breaking force from the extending portion is easily transmitted to the first end portion. In the two cuts, since the first straight portion, the first curved portion, and the second curved portion are formed in a projecting shape, the appearance of the cut surface can be improved.

  As the twenty-third configuration, in the twenty-third configuration, the first curved portion and the second curved portion may be formed in an arc shape or an elliptic arc shape.

  Further, as a 23rd configuration, in the above 23rd or 23rd configuration, an extension line (12E, 22E) from the first contact point of the straight line portion and a tangent line at the second contact point of the first curved portion. The angle (α12, α22) on the first curve portion side may be greater than 90 degrees between the angle (12E, 22E).

  Further, as the configuration of 23-3, in the configuration of the 23rd, 23-1, or 23-2, between the first straight line portion and the tangent line (15E, 25E) of the virtual curve at the first end portion. The acute angle may be smaller than 45 degrees.

  Further, as the 23rd configuration, in the 23rd, 23-1, 23-2, or 23-3 configuration, the first cut and the second cut are respectively changed from the first end to the fourth. In the range up to the contact point, the sum of the length (L12, L22) along the zipper opening direction of the first curved portion and the length (L13, L23) along the zipper opening direction of the second curved portion is the first The length (L11, L21) along the zipper opening direction of the straight portion and the length (L15, L25) along the zipper opening direction of the second straight portion may be longer than the sum.

  Further, as the 23-5th configuration, in the 23rd, 23-1, 23-2, 23-3, or 23-4 configuration, in each of the first cut and the second cut, The tangent line at the first contact point of the curved portion overlaps the first straight line portion, the tangent line of the first curved portion at the second contact point overlaps with the second straight line portion, and the tangent line of the second curved portion at the third contact point is The tangent line of the second curved line portion at the fourth contact point overlaps with the second straight line portion and may overlap with the extended portion.

  Further, as the 23-6 configuration, in the 23rd, 23-1, 23-2, 23-3, 23-4, or 23-5 configuration, the first cut and the second cut In each, the length (L14, L24) along the virtual curve between the fourth contact point and the second end is the length (L10, L20) along the virtual curve between the first end and the second end. 30) or more and 50% or less.

  In the twenty-fourth aspect, there is a paper box cut line used for a paper box formed by a sheet-like paper blank, the cut line opening direction is curved, and the paper box cut line is The plurality of cuts (10, 20) are arranged in a row at intervals, and the cuts are the first straight part (12, 22) and the first straight part that is one end of the first straight part. The first curve portion (14, 24) formed from the contact point (m12, m22) and the second contact point (m13-1, m23) which is the end of the first curve portion opposite to the first contact point. -1) from the second straight line portion (15, 25) formed from the third contact point (m13-2, m23-2) which is the end of the second straight line portion opposite to the second contact point. From the formed second curve portion (16, 26) and the fourth contact point (m14, m24) which is the end of the second curve portion opposite to the third contact point. The first extending portion (18, 28) is formed, and the first linear portion is linear between the first end (m11, m21) which is the other end of the first linear portion and the first contact point. Formed, the first curved portion is formed in a curved shape between the first contact point and the second contact point, the second straight portion is formed in a linear shape between the second contact point and the third contact point, Two curved portions are formed in a curved shape between the third contact point and the fourth contact point, and the extended portion is an end portion on the opposite side of the third contact point and the fourth contact point of the extended portion. Formed in a straight line between the portions (m15, m25), the extending portion is formed in the opening direction of the cut line, and the first end portion passes through the fourth contact point and the second end portion in a virtual curve in the opening direction of the cut line. Located on the imaginary curve (11E, 21E), the first straight line portion is at the first end portion so that the first end portion is located on the front side in the cut line opening direction from the first contact point. It is formed to be inclined with respect to the tangent lines (15E, 25E) of the imaginary curve, and the first curved portion is bent in the bending direction with respect to the direction of the first linear portion from the first contact point to the cut line opening direction side. The second straight line portion is formed such that the second contact point is located in front of the third contact point in the opening direction of the cut line, and the length from the second contact point to the virtual curve is from the third contact point to the virtual curve. The second curve portion is formed in a bending direction opposite to the bending direction of the first curve portion from the third contact point, and the first contact point is cut more than the second contact point. It is located on the front side in the line opening direction, and the third contact point is located on the front side in the cut line opening direction with respect to the fourth contact point.

  In the twenty-fourth configuration, the first end is located on the imaginary curve, and the extending portion is on the imaginary curve, and the breaking force from the extending portion is easily transmitted to the first end, Even when the center of the breaking force from the rear end of the stretched portion is directed outward, the first straight portion and the first curved portion are provided, so that the breaking force can be received. Can be smoothly broken, and the appearance of the cut surface can be improved.

  The first end portion is located on the virtual curve, and the extending portion is on the virtual curve, and the breaking force from the extending portion is easily transmitted to the first end portion. In the two cuts, since the first straight portion, the first curved portion, and the second curved portion are formed in a projecting shape, the appearance of the cut surface can be improved.

  Note that as a twenty-fourth configuration, in the twenty-fourth configuration, the first curved portion and the second curved portion may be formed in an arc shape or an elliptical arc shape.

  Further, as a 24-2 configuration, in the above-described 24th or 24-1 configuration, an extension line (12E, 22E) from the first contact point of the first straight portion and a second contact point of the second straight portion. The angle (α12, α22) on the first curve portion side with respect to the extension line (15E, 25E) from the first side may be larger than 90 degrees.

  Also, as the 24-3 configuration, in the 24th, 24-1, or 24-2 configuration, between the first straight line portion and the tangent line (15E, 25E) of the virtual curve at the first end portion. The acute angle may be smaller than 45 degrees.

  Moreover, as a 24th structure, in the said 24th, 24-1, or 24-2 or 24-3 structure, in the range from a 1st edge part to a 4th contact point, it is a 1st curve part. The sum of the length (L12, L22) along the cut line opening direction and the length (L13, L23) along the cut line opening direction of the second curved portion is along the cut line opening direction of the first straight line portion. It is good also as what is characterized by being longer than the sum of the length (L11, L21) and the length (L15, L25) along the cut line opening direction of a 2nd linear part.

  Also, as a 24th-5th configuration, in the above 24th, 24th-1st, 24-2th, 24th-3rd, or 24th-4th configuration, the tangent line at the first contact point of the first curved portion is The tangent line of the first curve portion at the second contact point overlaps with the first straight line portion, the tangent line of the second curve portion at the third contact point overlaps with the second straight line portion, and the fourth contact point. The tangent line of the second curved portion at the point may overlap with the extended portion.

  Further, as the 24th configuration, in the 24th, 24th, 24th, 24th, 24-3, 24-4, or 24-5, in the cutting, the fourth contact point and The length (L14, L24) along the virtual curve between the second ends is 30% or more and 50% or less of the length (L10, L20) along the virtual curve between the first end and the second end. It is good also as what is characterized by being.

  The twenty-fifth configuration may be the following configuration. That is, a bottom surface portion (50) and a sleeve-like portion standing from each side of the bottom surface portion and substantially perpendicular to the bottom surface portion, the front surface portion (10), the right side surface portion (20), and the left side surface portion (30). ) And a back surface portion (40), and a paper box having a lid portion (120, 130) continuously provided from the upper end of the sleeve shape portion. A cut line (K5) is provided in a circumferential shape, and the cut line is formed between the first cut line (K10) formed between the side part on the right side surface and the side part on the left side surface in the front part, and the right side part. A second cut line (K20) formed between the front side part and the back side part, and a third cut line (K30) formed between the front side part and the back side part in the left side part. ) And a fourth cut line (K40) formed between the right side and the left side of the back surface. And a pair of cut lines (K44, K45) connected from the fourth cut line to the lower back surface part (42), which is an area below the fourth cut line of the back part. Is provided on the upper back surface portion (45), which is an area above the fourth cut line on the back surface portion, and the first corner portion that is the upper corner portion on the right side surface side of the back surface portion and the right side surface of the fourth cut line. A first broken line (C42) is formed in a direction connecting the first corner and the first intermediate position at a position between the first intermediate position, which is an intermediate position from the side end to the left side end. In addition, the left side surface from the first halfway position in the middle position from the left side edge part to the right side edge part of the second corner part and the fourth cut line, which is the corner part of the upper left side of the rear face part. A second broken line (C43) is formed in a direction connecting the second corner and the second intermediate position at a position between the second intermediate positions on the side, and the first folding The line (C42) and the second fold line (C43) are formed symmetrically so that the length between the first fold line and the second fold line becomes shorter toward the fourth cut line side, and the lower end of the first fold line And the lower end of the second polygonal line are provided with a gap in the left-right direction, and the upper back surface portion is a central area (46) that is an area between the first polygonal line and the second polygonal line, and on the right side of the first polygonal line. A right side region (47) that is a region and a left side region (48) that is a region on the left side of the second polygonal line, and in the right side, in a region above the second cut line of the right side On the upper right side surface part (25), the third broken line (C21) extends from the back side end part of the back side of the right side part to the front side end part. Formed in the direction between the third corner and the third intermediate position at a position between the third intermediate position, which is the intermediate position of The third broken line is formed so as to be on the front side toward the lower side, and in the left side surface portion, the fourth left side portion (35), which is the region above the third cut line on the left side surface portion, The polygonal line (C31) is between the fourth corner, which is the upper corner of the rear side of the left side, and the fourth middle position, which is the middle of the third cut line from the rear end to the front end. Is formed in the direction connecting the fourth corner and the fourth intermediate position, and the fourth broken line is formed so as to be on the front side toward the lower side, and the third broken line or the second broken line in the second cut line Front side from the point of contact with the first specific cut line, which is at least a part of the cut line in the range of the front side from the contact point with the extension line of the three broken line, and the fourth broken line or the extension line of the fourth broken line in the third cut line A second specific cut line that is at least a part of the cut line in the range of , Both have a plurality of cuts, the cut line opening direction of the first specific cut line and the second specific cut line is linear, and the cut at the first specific cut line and the cut at the second specific cut line are straight lines A first curve portion (14, 24) formed from the portion (12, 22), a first contact point (m12, m22) which is one end of the linear portion, and a first contact point of the first curve portion The second curve portion (16, 26) formed from the second contact point (m13, m23) that is the end portion on the opposite side of the second curve portion, and the end portion on the opposite side of the second contact point of the second curve portion. It has the extending | stretching part (18, 28) formed from a certain 3rd contact point (m14, m24), and a linear part is the 1st end part (m11, m21) which is the other edge part of a linear part, and 1st The first curved portion is formed in a straight line between the contact points, and the first curved portion is formed in a curved line between the first contact point and the second contact point. The curved portion is formed in an arc shape or a curved shape between the second contact point and the third contact point, and the extended portion is an end portion on the opposite side of the third contact point and the third contact point of the extended portion. It is formed in a straight line between two end portions (m15, m25), the extending portion is formed in the cut line opening direction, and the first end portion is a virtual straight line in the cut line opening direction, and the third contact point and the second end portion The straight line portion is inclined with respect to the direction of the virtual straight line so that the first end portion is located on the front side in the opening direction of the cut line from the first contact point. The first curved portion is formed in a bending direction that is bent from the first contact point toward the cut line opening direction in the bending direction with respect to the direction of the linear portion, and the second curved portion is formed from the second contact point to the first curve. Formed in a bending direction opposite to the bending direction of the portion, the first contact point is more discontinuous than the second contact point It is located on the front side in the line opening direction, the second contact point is located on the front side in the cut line opening direction from the third contact point, and the notch in the first specific cut line is the second end of the right side surface portion. A lower right side surface side that is an area below the cut line is provided, and a first contact point (a first contact point, a second contact point, or a first curved portion may be provided) is provided as an upper right side surface side. The incision in the specific cut line is the first contact point (the first contact point and the second contact point, the first contact point) on the lower right side surface side which is the region below the second cut line of the right side surface part. (It may be a curved part) is provided on the upper right side, and the area between the pair of cut lines on the lower back is pushed from the outside, the finger is caught at the lower end of the central area, and the lower end of the central area is pulled outward. The right area passes through the first broken line with respect to the central area. And the left region bends through the second fold line with respect to the central region, and a break line between the left region and the lower back surface portion and a cut line between the right region and the lower back surface portion in the fourth cut line. The first back side region (27), which is an area on the back side of the third broken line in the upper right side surface portion, is turned inward via the third broken line, and the first back side at the second cut line A break line between the side area and the lower right side surface part (22), which is a lower area than the second cut line of the right side surface part, is broken, and a second side which is a back side area from the fourth broken line in the upper left side surface part. The back side region (37) rotates inward via the fourth broken line, and the lower left side surface portion (32) which is a region below the second back side region and the third cut line of the left side surface portion at the third cut line. ) The break line is broken, and the lower end of the center area As a result, the cut line between the first front side region (26), which is a region on the front side of the third broken line in the second cut line, and the lower right side surface portion breaks, and the fourth broken line in the third cut line. A paper box, wherein the cut line between the second front side region (36), which is a region on the front side, and the lower left side surface portion is broken. It is good also as.

  The twenty-sixth configuration may be the following configuration. That is, a bottom surface portion (50) and a sleeve-like portion standing from each side of the bottom surface portion and substantially perpendicular to the bottom surface portion, the front surface portion (10), the right side surface portion (20), and the left side surface portion (30). ) And a back surface portion (40), and a paper box having a lid portion (120, 130) continuously provided from the upper end of the sleeve shape portion. A cut line (K5) is provided in a circumferential shape, and the cut line is formed between the first cut line (K10) formed between the side part on the right side surface and the side part on the left side surface in the front part, and the right side part. A second cut line (K20) formed between the front side part and the back side part, and a third cut line (K30) formed between the front side part and the back side part in the left side part. ) And a fourth cut line (K40) formed between the right side and the left side of the back surface. And a pair of cut lines (K44, K45) connected from the fourth cut line to the lower back surface part (42), which is an area below the fourth cut line of the back part. Is provided on the upper back surface portion (45), which is an area above the fourth cut line on the back surface portion, and the first corner portion that is the upper corner portion on the right side surface side of the back surface portion and the right side surface of the fourth cut line. A first broken line (C42) is formed in a direction connecting the first corner and the first intermediate position at a position between the first intermediate position, which is an intermediate position from the side end to the left side end. In addition, the left side surface from the first halfway position in the middle position from the left side edge part to the right side edge part of the second corner part and the fourth cut line, which is the corner part of the upper left side of the rear face part. A second broken line (C43) is formed in a direction connecting the second corner and the second intermediate position at a position between the second intermediate positions on the side, and the first folding The line (C42) and the second fold line (C43) are formed symmetrically so that the length between the first fold line and the second fold line becomes shorter toward the fourth cut line side, and the lower end of the first fold line And the lower end of the second polygonal line are provided with a gap in the left-right direction, and the upper back surface portion is a central area (46) that is an area between the first polygonal line and the second polygonal line, and on the right side of the first polygonal line. A right side region (47) that is a region and a left side region (48) that is a region on the left side of the second polygonal line, and in the right side, in a region above the second cut line of the right side On the upper right side surface part (25), the third broken line (C21) extends from the back side end part of the back side of the right side part to the front side end part. Formed in the direction between the third corner and the third intermediate position at a position between the third intermediate position, which is the intermediate position of The third broken line is formed so as to be on the front side toward the lower side, and in the left side surface portion, the fourth left side portion (35), which is the region above the third cut line on the left side surface portion, The polygonal line (C31) is between the fourth corner, which is the upper corner of the rear side of the left side, and the fourth middle position, which is the middle of the third cut line from the rear end to the front end. Is formed in the direction connecting the fourth corner and the fourth intermediate position, and the fourth broken line is formed so as to be on the front side toward the lower side, and the third broken line or the second broken line in the second cut line Front side from the point of contact with the first specific cut line, which is at least a part of the cut line in the range of the front side from the contact point with the extension line of the three broken line, and the fourth broken line or the extension line of the fourth broken line in the third cut line A second specific cut line that is at least a part of the cut line in the range of , Both have a plurality of cuts, the cut line opening direction of the first specific cut line and the second specific cut line is linear, the cut at the first specific cut line and the cut at the second specific cut line, A first straight line part (12, 22), a first curve part (14, 24) formed from a first contact point (m12, m22) which is one end of the first straight line part, A second straight point (15, 25) formed from a second contact point (m13-1, m23-1) that is the end opposite to the first contact point, and a second contact point of the second straight point The second curve portion (16, 26) formed from the third contact point (m13-2, m23-2) which is the end portion on the opposite side to the side, and the third contact point on the opposite side to the third contact point of the second curve portion Having an extended portion (18, 28) formed from a fourth contact point (m14, m24) which is an end of the first incision and second The first straight line portion is formed linearly between the first end (m11, m21), which is the other end of the first straight line portion, and the first contact point, and the first curved line portion is A curved line is formed between the first contact point and the second contact point, a second straight line portion is formed linearly between the second contact point and the third contact point, and a second curved line portion is formed at the third contact point. And the fourth contact point are formed in a curved shape, and the extending portion is a straight line between the third contact point and the second end portion (m15, m25) which is the end portion on the opposite side of the extending portion. The first end is a virtual straight line (10E, 20E) passing through the fourth contact point and the second end in a virtual straight line in the cut line opening direction. The first straight line portion is inclined with respect to the direction of the imaginary straight line so that the first end portion is located on the front side in the opening direction of the cut line from the first contact point. The first curved portion is formed in a bending direction that is bent from the first contact point toward the cut line opening direction in the bending direction with respect to the direction of the first linear portion, and the second linear portion has the second contact point at the first contact point. With respect to the direction of the imaginary straight line so that the length from the second contact point to the imaginary straight line is longer than the length from the third contact point to the imaginary straight line. The second curve portion is formed in a bending direction opposite to the bending direction of the first curve portion from the third contact point, and the first contact point is opened along the cut line than the second contact point. Is located on the front side in the direction, the third contact point is located on the front side in the opening direction of the cut line from the fourth contact point, and the cut at the first specific cut line is the second cut line on the right side surface portion The lower right side, which is the lower area, The contact point (the first contact point and the second contact point, which may be the first curved portion) is provided on the upper right side surface side, and the cut at the second specific cut line is the second end of the right side surface portion. The lower right side is the lower right side, which is an area below the line, and the first contact point (the first contact point, the second contact point, or the first curved portion) may be provided as the upper right side. Push the area between the pair of cut lines from outside, hook your finger on the lower end of the central area, and pull the lower end of the central area outward, so that the right area is bent through the first fold line with respect to the central area In addition, the left region is bent with respect to the central region via the second fold line, and the cut line between the left region and the lower back surface portion and the cut line between the right region and the lower back surface portion in the fourth cut line are Fracture, back side from the third broken line in the upper right side The first back side region (27), which is a region of the second side, rotates inward via the third broken line, and is a region below the first back side region in the second cut line and the second cut line in the right side surface portion. A break line between a certain lower right side surface part (22) breaks, and a second back side area (37), which is an area on the back side with respect to the fourth broken line in the upper left side surface part, rotates inward via the fourth broken line. Then, the cut line between the second back side region at the third cut line and the lower left side part (32) which is the lower side of the third cut line at the left side part is broken, and further, the lower end of the central area is raised upward As a result, the cut line between the first front side region (26), which is the region on the front side of the third broken line in the second cut line, and the lower right side surface portion breaks, and the fourth broken line in the third cut line. The second front side region (the front side region) 36) and the lower left side surface portion are broken.

  In the twenty-fifth and twenty-sixth configurations, the space between the pair of score lines in the lower back surface portion is pressed to form a space for putting a finger below the central region. When removing, it is possible to easily perform the operation of hooking a finger first. Moreover, since the first fold line and the second fold line are provided, it is easy to break the cut line between the left region and the lower back surface portion and the right region and the lower back surface portion in the fourth cut line, Moreover, since the 3rd broken line and the 4th broken line are provided, the 2nd back side area | region and lower left side surface part in the 3rd score line between the 1st back side area | region and lower right side surface part in a 2nd score line It is easy to break the score line.

  The twenty-seventh configuration may be the following configuration. That is, in the twenty-fifth or twenty-sixth configuration, the cut line between the first front side region (26), which is a region on the front side of the third broken line in the second cut line, and the lower right side surface portion breaks, and the first After the cut line between the second front side region (36), which is the region on the front side of the fourth broken line in the third cut line, and the lower left side surface part is broken, the first cut line is broken, thereby The upper constituent part (A-2) composed of the upper front part (15), the upper right side part, the upper left side part, the upper rear part and the lid part, which is an area above the first cut line, is removed. .

  The twenty-eighth configuration may be the following configuration. That is, in any one of the 25th to 27th configurations, the second cut line is formed from the contact point with the third broken line or the extended line of the third broken line toward the front side of the second cut line. A first rising cut line (K24) formed so as to be higher on the front side in one rising cut line, and provided on the front side than the first rising cut line, and is on the lower side as it goes to the front side. And the first specific cut line is provided in a range from the back end to the front end of the first rise cut line. , Provided in the range from the back side end to the front side end of the first descending cut line, and the third cut line is a contact with the fourth broken line or the extended line of the fourth broken line in the third cut line Second rise formed from the front to the front A second rising cut line (K34) formed so as to be on the upper side as it goes to the front side along the line of cut, and provided on the front side of the second rising cut line so that it is on the lower side as it goes to the front side And a second specific cut line is provided in a range from the rear side end to the front side end of the second rising cut line, and the second specific cut line is formed in the second rising cut line (K32). 2 It is provided in the range from the end part on the back side to the end part on the front side in the descending cut line.

  Therefore, since the first rising cut line and the second rising cut line are formed so as to be higher on the front side, the first rising cut line and the second rising cut line are formed by pulling the lower end of the central region upward. It is easy to break the line, and since the first descending cut line and the second descending cut line are formed so as to be on the lower side as it goes to the front side, the upper constituent part is placed on the front side or the front lower side. The breaking of the first descending cut line and the second descending cut line by pulling becomes easy.

  The twenty-ninth configuration may be the following configuration. That is, in any one of the above 25th to 28th configurations, the cut line between the left side region and the lower back surface part in the fourth cut line and the cut line between the first back side region and the lower right side part in the right side surface part The above-mentioned incision in the first specific cut line is used, and the second cut line between the right side area and the lower back surface part in the fourth cut line and the second back side area and the lower left side part in the left side part are The above-mentioned cut at a specific cut line is used.

  According to the paper box zipper and the paper box cut line according to the present invention, the first end is located on a virtual straight line (virtual curve), and the extending part is a virtual straight line (virtual curve). The breaking force from the stretched portion is easily transmitted to the first end portion, and even when the center of the breaking force from the rear end of the stretched portion faces outward, the straight portion (first straight portion) Since one curve portion is provided, the breaking force can be received, so that the zipper (cut line) can be smoothly broken, and the appearance of the cut surface can be improved.

  The first end is located on a virtual straight line (virtual curve), and the extending part is on the virtual straight line (virtual curve), so that the breaking force from the extending part is easily transmitted to the first end. In addition, in the first cut and the second cut, the first cut portion and the second cut portion are formed in a projecting shape by the straight portion (first straight portion), the first curved portion, and the second curved portion, so that the appearance of the cut surface can be improved. it can.

(Example 1) which is a top view which shows the structure of a zipper. It is explanatory drawing which shows the principal part of the zipper of FIG. FIG. 3 is an enlarged view of a main part of FIG. 2. It is explanatory drawing for demonstrating the structure of a notch | incision. FIG. 3 is an enlarged view of a main part of FIG. 2. It is explanatory drawing explaining the use condition of the zipper of Example 1. FIG. It is explanatory drawing explaining the use condition of the zipper of Example 1. FIG. It is explanatory drawing explaining the effect | action of the zipper of Example 1. FIG. It is explanatory drawing explaining the effect | action of the zipper of Example 1. FIG. It is a top view which shows the structure of a zipper in case a zipper opening direction is curvilinear. It is a principal part enlarged view of FIG. It is a principal part enlarged view of FIG. It is a principal part enlarged view of FIG. It is a perspective view which shows the example of the paper box using the zipper of Example 1. FIG. FIG. 3 is a development view illustrating an example of a paper box using the zipper of the first embodiment. (Example 2) which is a top view which shows the structure of a cut line. (Example 2) which is a top view which shows the structure of a cut line. It is a left rear perspective view of a paper box. It is a right front perspective view of a paper box. It is a top view of a paper box. It is a bottom view of a paper box. It is an expanded view of a paper box. It is principal part explanatory drawing of FIG. It is principal part explanatory drawing of FIG. It is a left rear perspective view for demonstrating the usage method of a paper box. It is a left rear perspective view for demonstrating the usage method of a paper box. It is a left rear perspective view for demonstrating the usage method of a paper box. It is a left rear perspective view for demonstrating the usage method of a paper box. It is a right front perspective view for demonstrating the usage method of a paper box. It is explanatory drawing for demonstrating the effect | action of a paper box. (Example 3) which is a top view which shows the structure of a zipper. It is explanatory drawing which shows the principal part of the zipper of FIG. It is a principal part enlarged view of FIG. It is explanatory drawing for demonstrating the structure of a notch | incision. It is a principal part enlarged view of FIG. It is a top view which shows the structure of a zipper in case a zipper opening direction is curvilinear. It is a principal part enlarged view of FIG. It is a principal part enlarged view of FIG. It is a principal part enlarged view of FIG. (Example 4) which is a top view which shows the structure of a cut line. (Example 4) which is a top view which shows the structure of a cut line. It is a top view which shows the conventional zipper. It is explanatory drawing which shows the use condition of the zipper shown in FIG. It is a top view which shows the conventional zipper. It is explanatory drawing which shows the use condition of the zipper shown in FIG. It is a top view which shows the conventional zipper. It is explanatory drawing explaining the use condition of the zipper of FIG.

  In the present invention, in a zipper for paper boxes and a cutting structure for a cut line, a blank cutting line after cutting has a good appearance, and a cutting structure capable of smoothly breaking the zipper and the cutting line is provided. The purpose was achieved as follows.

  A zipper A as a paper box zipper (paper box cutting structure, carton cutting structure) according to the present invention is configured as shown in FIGS. And a cut A3 for forming the piece 30 at the opening start position. That is, the cut line A1 and the cut line A2 are formed in two rows in parallel to each other. The zipper A is formed on a sheet-like blank (for example, cardboard or cardboard) constituting a paper box.

  Here, the cut line A1 is formed by linearly arranging a plurality of cuts 10 in a row with a space therebetween, and each cut 10 includes a straight part 12 and a straight part as shown in FIGS. 12, the curved portion 14 provided continuously from the end portion, the curved portion 16 provided continuously from the end portion on the opposite side of the linear portion 12 of the curved portion 14, and the curved portion 14 on the opposite side of the curved portion 16. It has the extending | stretching part 18 provided in a row from the edge part. The straight portion 12, the curved portion 14, the curved portion 16, and the extending portion 18 are all formed by a cut that penetrates from the front surface to the back surface of the blank.

  Here, the straight portion (which may be an inclined portion. The same applies to other portions) 12 is formed so as to be inclined with respect to the virtual straight line 10E in the zipper opening direction (also referred to as the “zipper breaking direction”) (X1-X2 direction). The angle between the straight line portion 12 and the virtual straight line 10E (the angle on the curved line portion 14 side) is α11, and the angle α11 is an acute angle, specifically, an angle smaller than 45 degrees (specifically, 34 to 42 degrees). The straight portion 12 is formed in a straight line shape. The virtual straight line 10 </ b> E is a straight line formed in the opening direction of the zipper A and passing through the end m <b> 11 that is the front end of the straight part 12 and the end m <b> 15 that is the rear end of the extending part 18. 1 to 5 show a case where the zipper opening direction is linear, and the zipper forming direction is linear.

  The angle α11 is preferably set to 40 degrees or more in order to prevent peeling when the breaking force is directed outward (the same applies to α21 described later). This also applies to each embodiment described later.

  As shown in FIG. 3, the end portion (first end portion) m11 opposite to the curved portion 14 side of the straight portion 12 is from a contact point (first contact point) m12 with the curved portion 14 of the straight portion 12. Is also on the front side (X1 side) in the zipper opening direction. That is, the straight line portion 12 is inclined with respect to the direction of the virtual straight line 10E (may be a virtual straight line 10E) so that the end portion m11 is located in front of the contact point m12 in the zipper opening direction.

  Further, the end m11 is located on an extension line to the front side of the extending portion 18. That is, the end portion m11, the adhesion point m14 and the end portion m15 located at both ends of the extending portion 18 are located on the same straight line.

  Further, the curved portion (the first curved portion and the first arc-shaped portion may be the same. The same applies to other portions) 14 is formed in an arc shape from the end of the linear portion 12 as shown in FIG. (It is formed in an arc shape between the point m12 and the contact point m13), specifically, curved to the side in the zipper opening direction (specifically, the right side (or right direction)) (that is, bent) ) It is formed in an arc shape. That is, the curved portion 14 is formed in a bending direction that bends toward the zipper opening direction in the bending direction with respect to the direction of the straight portion 12. The tangent line of the curved portion 14 at the contact point m12 between the curved portion 14 and the linear portion 12 is overlapped with the linear portion 12, whereby the straight line of the linear portion 12 is located at the boundary between the linear portion 12 and the curved portion 14. The direction is smoothly switched from the direction to the arcuate direction of the curved portion 14. Further, the contact point m12 of the curved part 14 with the straight line part 12 is on the front side (X1 side) in the zipper opening direction with respect to the contact point (second contact point) m13 of the curved part 14 with the curved part 16.

  Further, the curved portion (which may be a second curved portion or a second arc-shaped portion. The same applies in other cases) 16 is formed in an arc shape from the end of the curved portion 14 as shown in FIG. (It is formed in an arc shape between the point m13 and the contact point m14), specifically, curved in the direction opposite to the curve direction of the curved portion 14 (that is, curved to the left side (or left direction)) It is formed in an arc shape. In other words, the curved portion 16 is formed in a bending direction opposite to the bending direction of the curved portion 14, and is formed in an arc shape between the contact point m13 and the contact point (third contact point) m14. The contact point m13 is in front of the contact point m14 in the zipper opening direction. The diameter (radius) of the arc that forms the curved portion 16 is larger than the diameter (radius) of the arc that forms the curved portion 14.

  Note that the tangent of the curved portion 14 at the contact point m13 and the tangent of the curved portion 16 at the contact point m13 overlap (that is, the tangent of the curved portion 14 at the contact point m13 and the tangent of the curved portion 16 at the contact point m13 are Thus, at the boundary between the curved portion 14 and the curved portion 16, the direction of the curved portion 14 is smoothly switched to the curved direction of the curved portion 16.

  Further, the contact point m14 is located on the virtual straight line 10E, and the tangent of the curved portion 16 at the contact point m14 is in the direction of the virtual straight line 10E (that is, the tangent overlaps with the extending portion 18). Since the portion 18 is also formed in the direction of the imaginary straight line 10E, at the boundary between the curved portion 16 and the extending portion 18, the direction is smoothly switched from the direction of the curved portion 16 to the extending portion 18.

  Further, the extending portion (which may be a straight portion) 18 is formed linearly from the end portion of the curved portion 16, and is formed linearly between the contact point m14 and the end portion (second end portion) m15.

  In the incision 10, an angle formed between the extended line 12E of the straight line portion 12 and the tangent line 14E of the curved line portion 14 at the contact point m13 (the angle on the curved line portion 14 side formed by the extended line 12E and the tangent line 14E) α12 is 90 degrees or more. For example, it is formed at 105 to 115 degrees (preferably 108 to 112 degrees). The angle α13 formed by the tangent line 14E and the virtual line 10E is substantially the same as the angle α11, but the angle α11 is formed to be slightly larger than the angle α13.

  Further, the length L14 of the extending portion 18 is 30% to 50% of the length L10 along the virtual straight line 10E from the end portion m11 to the end portion m15.

  Further, in the range from the end m11 to the contact point m14, the length (length L12 and length) along the virtual straight line 10E (that is, the zipper opening direction) of the curved portion (that is, the curved portion 14 and the curved portion 16). L13) is longer than the length (length L11) along the virtual straight line 10E (that is, the zipper opening direction) of the straight line portion (that is, the straight line portion 12), specifically, the virtual straight line of the curved portion. The length along 10E is twice or more the length along the virtual straight line 10E of the straight line portion.

  The length along the virtual straight line 10E is a length along the virtual straight line 10E at the intersection of the vertical line and the virtual straight line 10E. The same applies to others).

  As an example of a method of actually creating a graphic showing the cut 10, specifically, as shown in FIG. 4. That is, when the length from the end m11 to the end m15 (the length along the virtual straight line 10E) is 5 × N (N is a unit length), the isosceles whose left end is the position of the end m11 Draw a triangle. This isosceles triangle has a base of 2 × N length and a height of 0.8 × N, and is composed of hypotenuses 60 and 62 and a base 64. Here, the straight line portion 12 is formed on the hypotenuse 60.

  Then, an arc 66 having a radius of 3.2 × N is drawn at an obtuse angle α42 formed by the hypotenuse 62 and the virtual straight line 10E. This arc 66 is in contact with the virtual straight line 10E at the position W1, and is in contact with the hypotenuse 62 at the position W2. The curved portion 16 is formed on the arc 66, and the position W1 is a position corresponding to the contact point m14.

  Then, an arc 68 that touches the hypotenuse 60 and the arc 66 and has a radius of 0.6N is drawn. Then, this arc 68 contacts the hypotenuse 60 at the position W3 and contacts the arc 66 at the position W4. The position W4 is located outside the isosceles triangle composed of the hypotenuses 60 and 62 and the base 64. The arc 68 corresponds to the curved portion 14, the position W3 corresponds to the contact point m12, and the position W4 corresponds to the contact point m13.

  And the extending | stretching part 18 is formed by drawing linearly from the position W1 to the position corresponded to the edge part m15 along the virtual straight line 10E. As described above, a graphic showing the cut 10 is created. In the two adjacent cuts 10 in the opening direction, in the adjacent cuts 10, the rear end of the front cut 10 (the rear end of the extending portion 18) and the front end of the rear cut 10 (the front end of the straight portion 12). The length between them is N. In the two cuts 10 adjacent to each other in the opening direction, the length between the rear end of the front cut 10 and the front end of the rear cut 10 does not have to be N, but of course the zipper breakage is obstructed. The length of the zipper portion is short enough that the strength of the zipper portion can be maintained so that the zipper does not break carelessly.

  The opening direction of the zipper A can be said to be the direction connecting the same portions of the plurality of cuts 10, for example, the direction connecting the ends m11 of the plurality of cuts 10 can be said to be the opening direction of the zipper A, and the direction of the virtual straight line 10E is the zipper opening Direction. Further, the opening direction of the zipper A may be a direction connecting the same places in the plurality of cuts 20, for example, the direction connecting the end portions m21 in the plurality of cuts 20 is the opening direction of the zipper A, and the direction of the virtual straight line 20E Is the zipper opening direction. The zipper opening direction is the direction from the X1 side to the X2 side, the X1 side is the front side in the zipper opening direction, and the X2 side is the rear side in the zipper opening direction. That is, since the cuts 10 and 20 are ruptured from the straight portions 12 and 22, the straight portions 12 and 22 are the front side in the zipper opening direction and the end portions m15 and m25 are the cut portions. It is the rear side in the zipper opening direction.

  When the opening direction of the zipper A is linear (when the zipper A is formed linearly, the zipper forming direction may be linear), the direction connecting the plurality of ends m11 is linear. (That is, the imaginary line connecting the plurality of ends m11 along the zipper opening direction is linear, and the plurality of ends m11 are positioned on the linear imaginary line, ie, the imaginary straight line 10E in the zipper opening direction. The direction connecting the plurality of ends m21 is linear (that is, the virtual line connecting the plurality of ends m21 along the zipper opening direction is linear, and the plurality of ends m21 are linear It is located on the virtual line, that is, the virtual straight line 20E).

  On the other hand, when the opening direction of the zipper A is curvilinear (when the zipper A is formed in a curvilinear shape, the zipper formation direction may be curvilinear), as shown in FIG. When the direction connecting the ends m11 is curved (that is, the plurality of ends m11 are located on the virtual curve 11E in the zipper opening direction) and the opening direction of the zipper A is an arc, the plurality of ends m11 The plurality of contact points m14 and the plurality of end portions m15 are positioned on the arcuate virtual curve 11E, and the plurality of end portions m21, the plurality of contact points m24, and the plurality of end portions m25 are arcuate virtual curves 21E. Located on the top.

  In addition, in one cut line A1, the cuts 10 have the same configuration, and the interval between the adjacent cuts 10 is basically the same, and is adjacent when at least the zipper A is formed in a straight line. The intervals between the cuts 10 are formed the same.

  Next, as shown in FIG. 2, the cut line A2 is formed symmetrically (line symmetric) via the center line Ah between the cut line A1 and the cut line A2, and the gap line A1 is spaced from the cut line A1. Is formed. The center line Ah is a straight line having the same distance from the cut line A1 and the cut line A2, and has a point (for example, the end m11) having the cut 10 and a point (the end m11) corresponding to the certain point of the cut 20. In the case of points, it can be said that the distances from the end m21)) are equal straight lines.

  The cut line A2 is formed by arranging a plurality of cuts 20 in a straight line at intervals, and each cut 20 includes a straight part 22 and a straight part as shown in FIGS. A curved portion 24 continuously provided from the end portion of the curved portion 24, a curved portion 26 continuously provided from the end portion on the opposite side to the linear portion 22 of the curved portion 24, and a curved portion 24 on the opposite side of the curved portion 24. It has the extending | stretching part 28 provided in a row from the edge part. The straight portion 22, the curved portion 24, the curved portion 26, and the extending portion 28 are all formed by cutting that penetrates from the front surface to the back surface of the blank. Each cut 20 is formed symmetrically with respect to the corresponding cut 10 in the cut line A1 and the center line Ah. A center line Ah in FIG. 2 is a straight line parallel to the virtual straight lines 10E and 20E. In addition, in the plurality of cuts 10 and the plurality of cuts 20, the corresponding cuts 10 and the cuts 20 become longer as the length between the straight line part 12 of the cuts 10 and the straight line part 22 of the cuts 20 goes rearward in the zipper opening direction. Are symmetrical with each other. That is, in the notch 10 and the notch 20 corresponding to each other, the notch 10 and the notch 20 face each other in a state where the contact point m12 is outside the end portion m11 and the contact point m22 is outside the end portion m21. The line is symmetrical with respect to the center line Ah.

  Here, the straight portion (which may be an inclined portion, the same applies to other portions) 22 is formed to be inclined with respect to the virtual straight line 20E in the zipper opening direction (may be referred to as the “zipper breaking direction”) (X1-X2 direction). The angle between the straight line portion 22 and the virtual straight line 20E (the angle on the curved line portion 14 side) is α21, and the angle α21 is an acute angle, specifically, an angle smaller than 45 degrees (specifically, 34 to 42 degrees). The straight portion 22 is formed in a straight line shape. The virtual straight line 20 </ b> E is a straight line that is formed in the opening direction of the zipper A and passes through the end m <b> 21 that is the front end of the straight part 22 and the end m <b> 25 that is the rear end of the extending part 28.

  As shown in FIG. 5, the end portion (first end portion) m21 opposite to the curved portion 24 side of the straight portion 22 is from a contact point (first contact point) m22 with the curved portion 24 of the straight portion 22. Is also on the front side (X1 side) in the opening direction. That is, the straight line portion 22 is inclined with respect to the direction of the virtual straight line 20E (or may be a virtual straight line 20E) so that the end m21 is located in front of the contact point m22 in the zipper opening direction.

  Further, the end m21 is located on an extension line to the front side of the extending portion 28. That is, the end portion m21 and the adhesion point m24 and the end portion m25 located at both ends of the extending portion 28 are located on the same straight line.

  Further, the curved portion (the first curved portion and the first arc-shaped portion may be the same. The same applies to other portions) 24 is formed in an arc shape from the end portion of the linear portion 22 as shown in FIG. (It is formed in an arc shape between the point m22 and the contact point m23), specifically, curved to the side in the zipper opening direction (specifically, the left side (or left direction)) (that is, bent) ) It is formed in an arc shape. That is, the curved portion 24 is formed in a bending direction that is bent toward the zipper opening direction in the bending direction with respect to the direction of the straight portion 22. The tangent line of the curved portion 24 at the contact point m22 between the curved portion 24 and the straight portion 22 is overlapped with the straight portion 22, so that the straight line of the straight portion 22 is located at the boundary between the straight portion 22 and the curved portion 24. The direction is smoothly switched from the direction to the arcuate direction of the curved portion 24. Further, the contact point m22 of the curved portion 24 with the straight portion 22 is on the front side (X1 side) in the zipper opening direction with respect to the contact point (second contact point) m23 of the curved portion 24 with the curved portion 26.

  Further, the curved portion (which may be a second curved portion or a second arc-shaped portion. The same applies to other portions) 26 is formed in an arc shape from the end of the curved portion 24 as shown in FIG. (It is formed in an arc shape between the point m23 and the contact point m24), specifically, curved in the direction opposite to the curve direction of the curved portion 24 (that is, curved to the right side (or right direction)) It is formed in an arc shape. That is, the curved portion 26 is formed in a bending direction opposite to the bending direction of the curved portion 24, and is formed in an arc shape between the contact point m23 and the contact point (third contact point) m24. The contact point m23 is in front of the contact point m24 in the zipper opening direction. The diameter (radius) of the arc that forms the curved portion 26 is larger than the diameter (radius) of the arc that forms the curved portion 24.

  Note that the tangent of the curved portion 24 at the contact point m23 and the tangent of the curved portion 26 at the contact point m23 overlap (that is, the tangent of the curved portion 24 at the contact point m23 and the tangent of the curved portion 26 at the contact point m23 are As a result, at the boundary between the curved portion 24 and the curved portion 26, the direction of the curved portion 24 is smoothly switched to the curved direction of the curved portion 26.

  Further, the contact point m24 is located on the virtual straight line 20E, and the tangent of the curved portion 26 at the contact point m24 is in the direction of the virtual straight line 20E (that is, the tangent overlaps with the extending portion 28). Since the portion 28 is also formed in the direction of the imaginary straight line 20E, at the boundary between the curved portion 26 and the extending portion 28, the direction is smoothly switched from the direction of the curved portion 26 to the extending portion 28. The extending portion 28 is formed linearly from the end of the curved portion 26, and is formed linearly between the contact point m24 and the end (second end) m25.

  In the incision 20, the angle formed between the extended line 22E of the straight line portion 22 and the tangent line 24E of the curved portion 24 at the contact point m23 (the angle on the curved line portion 24 side formed by the extended line 22E and the tangent line 24E) α22 is 90 degrees or more. For example, it is formed at 105 to 115 degrees (preferably 108 to 112 degrees). The angle α23 formed by the tangent line 24E and the virtual straight line 20E is substantially the same as the angle α21, but the angle α21 is formed to be slightly larger than the angle α23.

  Further, the length L24 of the extending portion 28 is 30% to 50% of the length L20 along the virtual straight line 20E from the end m21 to the end m25.

  Further, in the range from the end m21 to the contact point m24, the length (length L22 and length) along the virtual straight line 20E (that is, the zipper opening direction) of the curved portion (that is, the curved portion 24 and the curved portion 26). L23) is longer than the length (length L21) along the virtual straight line 20E (that is, the zipper opening direction) of the straight line portion (that is, the straight line portion 22), specifically, the virtual straight line of the curved portion. The length along 20E is more than twice the length along the virtual straight line 20E of the straight line portion.

  In addition, in one cut line A2, the cuts 20 have the same configuration, and the interval between the adjacent cuts 20 is basically the same, and is adjacent when at least the zipper A is formed in a straight line. The intervals between the cuts 20 are formed the same.

  When the cut line A1 is the first cut line, the cut line A2 is the second cut line, the cut 10 is the first cut, and the cut 20 is the second cut. When the cut line A1 is the second cut line, the cut line A2 is the first cut line, the cut 10 is the second cut, and the cut 20 is the first cut.

  In addition, as a case where the zipper A is formed in a curved shape, it is formed like a zipper A ′ shown in FIGS. 10 to 13, and the zipper A ′ has a cut line A 1 ′ and a cut line A 2 ′, The cut line A1 ′ is a line in which a plurality of cuts 10 are arranged in a line at intervals, and the cut 10 is a straight line part 12, a curved part 14, and a curved part, similar to the cut line 10 of the cut line A1. 16 and the extending portion 18 (see FIG. 12), and the extending portion 18 is substantially the same as the cut line A1 except that the extending portion 18 is formed in a curved shape along the zipper opening direction.

  That is, the straight line portion 12 is positioned on the tangent line 15E of the virtual curve 11E at the end portion m11 so that the end portion (first end portion) m11 is located in front of the contact point (first contact point) m12 in the zipper opening direction. It is inclined with respect to it. The straight line portion 12 is formed in a straight line shape. An angle α11 with respect to the tangent line 15E of the straight line portion 12 is an angle smaller than 45 degrees. The straight line portion 12 is formed to be inclined with respect to the virtual straight line 10E ′ along the zipper opening direction, and the angle α11 ′ of the straight line portion 12 with respect to the virtual straight line 10E ′ forms an acute angle. This end m11 is located on an extension line along a virtual curve to the front side of the extending portion 18. That is, the end m11, the contact point (third contact point) m14 and the end (second end) m15 located at both ends of the extending part 18 are located on the same curve along the zipper opening direction. Yes.

  The imaginary straight line 10E 'is a straight line connecting an end m11 of a certain notch 10 and an end m11 of the next notch 10 in the zipper opening direction of a certain notch 10. The virtual curve 11E is a curve that is formed in the opening direction of the zipper A ′ and passes through the end portion m11 that is the front end of the straight portion 12 and the end portion m15 that is the rear end of the extending portion 18.

  The curved portion 14 is formed in an arc shape from the end of the straight portion 12, and the tangent of the curved portion 14 at the contact point m12 between the curved portion 14 and the straight portion 12 overlaps the straight portion 12. .

  The curved portion 16 is formed in an arc shape from the end of the curved portion 14 so that the tangent of the curved portion 14 at the contact point (second contact point) m13 and the tangent of the curved portion 16 at the contact point m13 overlap. It has become.

  The contact point m14 is located on the virtual curve 11E, the tangent line of the curved portion 16 at the contact point m14 overlaps with the tangent line of the extending portion 18 at the contact point m14, and the extending portion 18 is formed in the direction of the virtual curve 11E. ing.

  The extending portion 18 is formed in a curved shape along the zipper opening direction from the end of the curved portion 16. That is, the extending portion 18 is on the virtual curve 11E.

  Also in the configuration shown in FIG. 12, in the incision 10, the angle formed by the extension line 12E of the straight line portion 12 and the tangent line 14E of the curved line portion 14 at the contact point m13 (on the side of the curved line portion 14 formed by the extended line 12E and the tangential line 14E). The angle α12 is greater than 90 degrees, and is, for example, 105 to 115 degrees (preferably 108 to 112 degrees).

  The length L14 (length along the virtual curve 11E) of the extending portion 18 is 30% to 50% of the length L10 along the virtual curve 11E from the end m11 to the end m15. Further, the length of the extending portion 18 (the length along the virtual straight line 10E ′) is 30% to 50% of the length L10 ′ along the virtual straight line 10E ′ from the end m11 to the end m15. Yes.

  In the range from the end m11 to the contact point m14, the length along the virtual curve 11E of the curved portion (that is, the curved portion 14 and the curved portion 16) (the sum of the length L12 and the length L13) is a straight line. It is longer than the length (length L11) along the virtual curve 11E of the portion (that is, the straight line portion 12), specifically, the length along the virtual curve 11E (that is, the zipper opening direction) of the curved portion. The length of the straight portion along the virtual curve 11E is twice or more. In addition, when the curve part or the straight line part is not formed in the direction of the virtual curve 11E, the length along the virtual curve 11E is the shortest straight line from both ends of the curve part or the straight line part to the virtual curve 11E, The length is along the virtual curve 11E between the intersections of these straight lines and the virtual curve 11E. For example, the length L11 along the virtual curve 11E of the straight line portion 12 is the length along the virtual curve 11E between the intersection m12 ′ of the shortest straight line from the contact point m12 to the virtual curve 11E and the virtual curve 11E and the end m11. It becomes. In the range from the end m11 to the contact point m14, the length along the virtual straight line 10E ′ of the curved portion (that is, the curved portion 14 and the curved portion 16) (the sum of the length L12 ′ and the length L13 ′). Is longer than the length (length L11 ′) along the virtual straight line 10E ′ of the straight line portion (that is, the straight line portion 12), specifically, the length of the curved line portion along the virtual straight line 10E ′ is The length of the straight line portion is at least twice the length along the virtual straight line 10E ′.

  In addition, in one cut line A1 ′, the cuts 10 have the same configuration, and the interval between the adjacent cuts 10 is basically the same, but the curve when the zipper A ′ is formed in a curved shape. When the curvature in the shape changes, the extending portion 18 is formed along the zipper opening direction, so the shape of the extending portion 18 is different.

  In addition, the cut line A2 ′ is a line in which a plurality of cuts 20 are arranged in a line at intervals, and the cut 20 is similar to the cut line 20 of the cut line A2, and includes a straight line portion 22 and a curved line portion 24. It has substantially the same configuration as the cut line A2, except that it has a curved portion 26 and an extending portion 28 (see FIG. 13), and the extending portion 28 is formed in a curved shape along the zipper opening direction.

  That is, the straight line portion 22 is positioned on the tangent line 25E of the virtual curve 21E at the end portion m21 so that the end portion (first end portion) m21 is located in front of the contact point (first contact point) m22 in the zipper opening direction. It is inclined with respect to it. The straight portion 22 is formed in a straight line shape. An angle α21 with respect to the tangent line 25E of the straight line portion 22 is an angle smaller than 45 degrees. Further, the straight line portion 22 is formed to be inclined with respect to the virtual straight line 20E ′ along the zipper opening direction, and an angle α21 ′ of the straight line portion 22 with respect to the virtual straight line 20E ′ forms an acute angle. The end portion m21 is located on the extension line to the front side of the extending portion 28. That is, the end m21, the contact point (third contact point) m24 and the end (second end) m25 located at both ends of the extending part 28 are located on the same curve along the zipper opening direction. Yes.

  The imaginary straight line 20E 'is a straight line that connects an end m21 of a notch 20 and an end m21 of the next notch 20 in the zipper opening direction of the notch 20. The virtual curve 21E is a curve that is formed in the opening direction of the zipper A ′ and passes through the end m21 that is the front end of the linear portion 22 and the end m25 that is the rear end of the extending portion 28.

  The curved portion 24 is formed in an arc shape from the end of the straight portion 22, and the tangent line of the curved portion 24 at the contact point m <b> 22 between the curved portion 24 and the straight portion 22 is overlapped with the straight portion 22. .

  Further, the curved portion 26 is formed in an arc shape from the end of the curved portion 24 so that the tangent of the curved portion 24 at the contact point (second contact point) m23 and the tangent of the curved portion 26 at the contact point m23 overlap. It has become.

  Further, the contact point m24 is located on the virtual curve 21E, the tangent of the curved portion 26 at the contact point m24 overlaps with the tangent of the extending portion 28 at the contact point m24, and the extending portion 28 is also formed in the direction of the virtual curve 21E. ing.

  Moreover, the extending | stretching part 28 is formed in the curve shape along the zipper opening direction from the edge part of the curve part 26. As shown in FIG. That is, the extending portion 28 is on the virtual curve 21E.

  Also in the configuration shown in FIG. 13, in the incision 20, the angle formed by the extended line 22E of the straight line portion 22 and the tangent line 24E of the curved line portion 24 at the contact point m23 (on the curved line 24 side formed by the extended line 22E and the tangent line 24E). The angle α22 is greater than 90 degrees, and is, for example, 105 to 115 degrees (preferably 108 to 112 degrees).

  Further, the length of the extending portion 28 (the length along the virtual curve 21E) is 30% to 50% of the length L20 along the virtual curve 21E from the end m21 to the end m25. The length of the extending portion 28 (the length along the virtual straight line 20E ′) is 30% to 50% of the length L20 ′ along the virtual straight line 20E ′ from the end m21 to the end m25. Yes.

  In the range from the end m21 to the contact point m24, the length along the virtual curve 21E of the curved portion (that is, the curved portion 24 and the curved portion 26) (the sum of the length L22 and the length L23) is a straight line. It is longer than the length (length L21) along the virtual curve 21E of the portion (that is, the straight portion 22), specifically, the length along the virtual curve 21E (that is, the zipper opening direction) of the curved portion. The length of the straight line portion along the virtual curve 21E is twice or more. In addition, when the curve part or the straight line part is not formed in the direction of the virtual curve 21E, the length along the virtual curve 21E draws the shortest straight line from the both ends of the curve part or the straight line part to the virtual curve 21E. It becomes the length along the virtual curve 21E between the intersections of these straight lines and the virtual curve 21E. Further, in the range from the end m21 to the contact point m24, the length along the virtual straight line 20E ′ of the curved portion (that is, the curved portion 24 and the curved portion 26) (the sum of the length L22 ′ and the length L23 ′). Is longer than the length (length L21 ′) along the virtual straight line 20E ′ of the straight line portion (that is, the straight line portion 22), specifically, the length of the curved line portion along the virtual straight line 20E ′ is The length of the straight line portion is not less than twice the length along the virtual straight line 20E ′.

  In addition, in one cut line A2 ′, the cut 20 has the same configuration, and the interval between the adjacent cuts 20 is formed in principle the same, but the curve when the zipper A ′ is formed in a curved shape. When the curvature in the shape changes, the stretched portion 28 is formed along the zipper opening direction, so the shape of the stretched portion 28 is different.

  When the cut line A1 'is the first cut line, the cut line A2' is the second cut line, the cut 10 is the first cut, and the cut 20 is the second cut. When the cut line A1 'is the second cut line, the cut line A2' is the first cut line, the cut 10 is the second cut, and the cut 20 is the first cut.

  Even when the zipper A is formed in a curved shape, the cuts 10 and the cuts 20 corresponding to each other in the plurality of cuts 10 and the plurality of cuts 20 are the lengths between the straight portions 12 of the cuts 10 and the straight portions 22 of the cuts 20. Are opposed to each other in a state where the length becomes longer toward the rear side in the zipper opening direction. That is, in the notch 10 and the notch 20 corresponding to each other, the notch 10 and the notch 20 face each other in a state where the contact point m12 is outside the end portion m11 and the contact point m22 is outside the end portion m21. ing.

  Even when the zipper A is formed in a curved shape, the pair of cuts 10 and the cut 20 are basically formed symmetrically about the center line Ah ′ for each pair of cuts. However, since at least the extending portions 18 and 28 are formed along the zipper opening direction, they are not line symmetric. Moreover, also about the length of the extending | stretching parts 18 and 28, if the length of the extending | stretching part 18 and the length of the extending | stretching part 28 are made the same, along the virtual curve 11E of the clearance gap between the adjacent notches 10 in cut line A1 '. In this case, the length of the extending portion 18 is set to the length of the extending portion 28. It is preferable to make the gap between the adjacent cuts as long as possible, and even in this case, the pair of cuts 10 and the cuts 20 are not line-symmetric.

  In addition, as shown in FIGS. 1 and 2, the cut A <b> 3 has a substantially U shape, and has a substantially U shape that opens to the X <b> 2 side (cut line A <b> 1, A <b> 2 side). That is, the cut A3 includes a straight cut 32 formed on the extended line of the extending portion 18, a straight cut 34 formed on the extended line of the extended portion 28, and the X1 side (cut) of the cut 32 and the cut 34. A notch 36 is formed between the ends of the lines A1 and A2 on the opposite side to the center line Ah. That is, the cut 32 is on the virtual straight line 10E, and the cut 34 is on the virtual straight line 20E. A region surrounded by the cut A3 (that is, a region surrounded by a straight line connecting the cut A3 and the end portion of the cut 32 on the X2 side and the end portion of the cut 34 on the X2 side) is a piece 30.

  In the above description, the curved portions 14 and 24 and the curved portions 16 and 26 are arcuate, but may be elliptical arcs instead of arcs. That is, even if the curved portions 14 and 24 and the curved portions 16 and 26 are formed in an elliptical arc shape instead of the circular arc shape, the same operation and effect as described above can be obtained. Further, the curved portion 14 does not have to be an arc shape or an elliptical arc shape as long as the curved portion 14 is formed in a curved shape that curves in the bending direction that turns to the zipper opening direction side in the bending direction with respect to the direction of the linear portion 12 from the contact point m12. In addition, the curved portion 24 may not be an arc shape or an elliptical arc shape as long as the curved portion 24 is formed in a curved shape that curves in the bending direction with respect to the direction of the linear portion 22 from the contact point m22. The curved portion 16 may not be an arc or an elliptical arc as long as the curved portion 16 is formed in a curved shape that is curved in a direction opposite to the bending direction of the curved portion 14 from the contact point m13. As long as it is formed in a curved shape curved from the contact point m23 to the bending direction opposite to the bending direction of the curved portion 24, it may not be an arc shape or an elliptical arc shape.

  When using the zipper A, the zipper A is broken by raising the piece 30 and holding it by hand and pulling it in the X2 direction (opening direction), thereby breaking the gap between the adjacent notches 10 and the adjacent notches 20. Is done. Thereby, as shown in FIG. 6, the strip | belt-shaped part 40 isolate | separates from a blank, and the clearance gap 50 after isolate | separating the strip | belt-shaped part 40 is formed in a blank. Cut surfaces 52 and 54 are formed on both sides of the gap in the blank. In this case, the belt-like portion 40 is separated in a direction substantially perpendicular to the blank surface with respect to the regions on both sides of the belt-like portion 40 (that is, one region via the cut line is separated from the other region). Pull apart in a generally vertical direction).

  Here, in the zipper A, the end m11 is located on the virtual straight line 10E, and the extending part 18 is on the virtual straight line 10E, so that the breaking force from the extending part 18 is transmitted to the end m11. Cheap. That is, in FIG. 7, since the center of the breaking force from the extending portion 18 is likely to be in the direction of H3, it is easily transmitted to the end portion m11. Further, even when the center of the breaking force from the rear end of the extending portion 18 faces outward (for example, when facing the directions of H1 and H2 in FIG. 7), the straight portion 12 and the curved portion 14 are provided. Therefore, the breaking force can be received. Therefore, the zipper A can be smoothly broken. Further, since the peeling is hardly caused by receiving the breaking force by the straight portion 12 or the curved portion 14, the appearance of the cut surface can be improved. In addition, when the thickness of the blank is thin (for example, E flute, F flute, G flute), the joint between the notches 10 can be broken with a weak force. The center of the breaking force is hard to face inward (it is hard to go in the direction of H4), and even if the center of breaking force is directed inward, if it breaks with a weak force, it does not go greatly inward. The breaking force can be received at the part m11. Further, even when the center of the breaking force is directed outward, when it is broken with a weak force, it does not greatly move outward, so the length L15 between the vertex of the curved portion 14 and the virtual straight line 10E (see FIG. 3). Even when the length is short, the breaking force can be received by the straight portion 12 or the curved portion 14. Similarly, the end m21 is located on the virtual straight line 20E, and the extending part 28 is on the virtual straight line 20E. Therefore, the breaking force from the extending part 28 is easily transmitted to the end m21, and the extending part 28 is stretched. Even when the center of the breaking force from the rear end of the portion 28 faces outward, since the straight portion 22 and the curved portion 24 are provided, the breaking force can be received, and the zipper A is smoothly broken. be able to. Further, since the peeling is hardly caused by receiving the breaking force by the straight portion 22 or the curved portion 24, the appearance of the cut surface can be improved.

  Even when the zipper opening direction is curved, the end m11 is located on the virtual curve 11E, and the extending portion 18 is on the virtual curve 11E, so that the breaking force from the extending portion 18 is the end. It is easy to be transmitted to the part m11, and even when the center of the breaking force from the rear end of the extending part 18 faces outward, the straight part 12 and the curved part 14 are provided, so that the breaking force can be received, Therefore, the zipper A ′ can be smoothly broken, and the appearance of the cut surface can be improved. Similarly, since the end m21 is located on the virtual curve 21E and the extending part 28 is on the virtual curve 21E, the breaking force from the extending part 28 is easily transmitted to the end m21. Even when the center of the breaking force from the rear end of the portion 28 faces outward, since the straight portion 22 and the curved portion 24 are provided, the breaking force can be received, and thus the zipper A ′ is smoothly broken. And the appearance of the cut surface can be improved.

  As described above, the zippers A and A 'are particularly suitable when the thickness of the blank is thin (the same applies to the cut lines B1 and B2 described later).

  In addition, in order to make peeling difficult to occur, the lengths of the straight portions 12 and 22 are required to some extent, and the length L11 along the virtual straight line 10E (or virtual curve 11E) of the straight portion 12 is from the end m11 to the end. It is desirable that it is 10% or more (preferably 12% or more) of the length L10 along the virtual straight line 10E (or virtual curve 11E) up to the part m15, and the length L11 is a contact point from the end m11. It is desirable that it is 15% or more (preferably 18% or more) of the length along the virtual straight line 10E (or virtual curve 11E) up to m14. Similarly, the virtual straight line 20E (or virtual curve 21E) of the straight line portion 22 is also desirable. ) Along the imaginary straight line 20E (or imaginary curve 21E) from the end m21 to the end m25 is preferably 10% or more (preferably 12% or more). Ku, The length L21, the length of 15% or more (preferably, 18% or more) of which along the imaginary straight line 20E from the end m21 to the contact point m24 (or virtual curve 21E) is desirably. This also applies to each embodiment described later.

  Further, in the zipper A, the end m11 is located on the virtual straight line 10E, and the extending part 18 is on the virtual straight line 10E, and the breaking force from the extending part 18 is easily transmitted to the end m11, Moreover, in the notch 10, since it forms in the protruding shape by the linear part 12, the curved part 14, and the curved part 16, the appearance of the cut surface 52 can be improved. Similarly, in the zipper A, the end m21 is located on the virtual straight line 20E, and the extending part 28 is on the virtual straight line 20E, so that the breaking force from the extending part 28 is easily transmitted to the end m21. In addition, since the cut 20 is formed in a protruding shape by the straight portion 22, the curved portion 24, and the curved portion 26, the appearance of the cut surface 54 can be improved. That is, when the zipper A is broken, as shown in FIG. 6, the projecting portions T1 and T2 (see FIG. 47) as in Patent Document 2 are not formed on the cut surfaces 52 and 54, and Even if the protrusions such as the protrusions T1 and T2 are formed, it is an extremely small protrusion, so that the appearance of the cut surfaces 52 and 54 can be improved. The projecting shape composed of 22, curved parts 14, 24 and curved parts 16, 26 is formed by a smooth curve having an arc or elliptical arc, in particular, by the curved parts 14, 24 and curved parts 16, 26. Even in terms of points, the appearance of the cut surfaces 52 and 54 can be improved.

  Even when the zipper opening direction is curved, the end m11 is located on the virtual curve 11E, and the extending part 18 is on the virtual curve 11E, and the breaking force from the extending part 18 is the end part. It is easy to be transmitted to m11, and the cut 10 is formed in a protruding shape by the straight portion 12, the curved portion 14, and the curved portion 16, so that the appearance of the cut surface can be improved. Similarly, the end m21 is located on the imaginary curve 21E, and the extending portion 28 is on the imaginary curve 21E, so that the breaking force from the extending portion 28 is easily transmitted to the end m21, and the notch 20 In FIG. 3, since the straight portion 22, the curved portion 24, and the curved portion 26 are formed in a projecting shape, the appearance of the cut surface can be improved.

  Further, since the angle α11 formed by the straight line portion 12 and the virtual straight line 10E is smaller than 45 degrees, the impact when the breaking force from the previous notch 10 is transmitted to the straight line portion 12 is extremely small, and the angle α12 is 90 degrees. Therefore, the breaking force from the straight portion 12 can be smoothly transmitted to the extending portion 18, and the zipper A can be smoothly broken. Since the angle α11 can be reduced by increasing the angle α12 to be greater than 90 degrees, the impact when the breaking force is transmitted to the straight portion 12 can be reduced by increasing the angle α12 to be greater than 90 degrees. A can be broken smoothly. Similarly, since the angle α21 formed by the straight line portion 22 and the virtual straight line 20E is smaller than 45 degrees, the impact when the breaking force from the previous notch 20 is transmitted to the straight line portion 22 is extremely small, and the angle α22 is Since it is larger than 90 degrees, the breaking force from the straight part 22 can be smoothly transmitted to the extending part 28, and therefore the zipper A can be smoothly broken. In addition, when the angles α11 and α21 are 45 degrees or more, an impact when the breaking force is transmitted to the linear portions 12 and 22 is felt, and when the angles α11 and α21 are smaller than 90 degrees, the breakage occurs. Since the force is not smoothly transmitted to the extending portions 18 and 28, there is a problem that it is difficult to break smoothly.

  Even when the zipper opening direction is curved, the angle α11 with respect to the tangent line 15E of the virtual curve 11E at the end m11 of the straight line portion 12 is smaller than 45 degrees, and the angle α12 is more than 90 degrees. Therefore, the breaking force from the straight portion 12 can be smoothly transmitted to the extending portion 18, and therefore the zipper A ′ can be smoothly broken. Similarly, the angle α21 with respect to the tangent line 25E of the virtual curve 21E at the end m21 of the straight line portion 22 is an angle smaller than 45 degrees, and the angle α22 is larger than 90 degrees. Can be broken.

  Moreover, when the length of the extending portion 18 is 30% or more of the length L10, the breaking force is applied from the rear end (that is, the end portion m15) of the extending portion 18 to the front end ( That is, it becomes easy to transmit to the end portion m11), and the length α of the extending portion 18 is 50% or less of the length L10, so that the angle α11 of the straight portion 12 with respect to the virtual straight line 10E is made smaller than 45 degrees. On the other hand, the length L15 from the vertex of the curved portion 14 to the virtual straight line 10E and the length of the straight portion 12 can be secured long enough to prevent peeling. The vertex of the curved portion 14 is a position in the curved portion 14 where the length to the virtual straight line 10E is the longest. That is, if the length of the extending portion 18 is 50% or more of the length L10, the length from the end m11 to the contact point m14 is shortened accordingly, and if the angle α11 is smaller than 45 degrees, the length is increased. When the length L15 is shortened and the length L15 is shortened, the length of the linear portion 12 is shortened. As a result, when the breaking force from the extending portion 18 of the previous notch 10 is directed outward, The breaking force cannot be received by the straight portion 12, and peeling occurs. In addition, if peeling does not occur, the appearance of the cut surface does not deteriorate, and the zipper can be smoothly broken. Similarly, when the length of the extending portion 28 is 30% or more of the length L20, the breaking force is applied from the rear end (that is, the end portion m25) of the extending portion 28 to the front end of the straight portion 22 of the next cut 20. (That is, the end portion m21) can be easily transmitted, and the length α of the extending portion 28 is 50% or less of the length L20, so that the angle α21 of the straight portion 22 with respect to the virtual straight line 20E is smaller than 45 degrees. However, the length L25 from the apex of the curved portion 24 to the virtual straight line 20E and the length of the straight portion 22 can be secured long enough to prevent peeling.

  Even when the zipper opening direction is curved, the length of the extending portion 18 (the length along the virtual curve 11E) is 30% or more of the length L10 along the virtual curve 11E (the length of the extending portion 18). Since the length (“the length along the virtual straight line 10E ′) may be 30% or more of the length L10 ′ along the virtual straight line 10E ′”), the breaking force is applied from the rear end of the extending portion 18. It is easy to transmit to the front end of the straight portion 12 of the next cut 10 and the length of the extending portion 18 (the length along the virtual curve 11E) is 50% or less of the length L10 along the virtual curve 11E ( Since the length of the extended portion 18 (“the length along the virtual straight line 10E ′) may be 50% or less of the length L10 ′ along the virtual straight line 10E ′”), the tangent line 15E of the straight portion 12 While the angle α11 with respect to is smaller than 45 degrees, The length of the length or the linear part 12 from a point to the virtual curve 11E may be secured long enough to peeling does not occur. In addition, if peeling does not occur, the appearance of the cut surface does not deteriorate, and the zipper can be smoothly broken. Similarly, the length of the extending portion 28 (the length along the virtual curve 21E) is 30% or more of the length L20 along the virtual curve 21E (the length of the extending portion 28 (in the “virtual straight line 20E ′”). The length along the imaginary straight line 20E ′ may be 30% or more of the length L20 ′ ”), and the breaking force is applied to the straight portion 22 of the next cut 20 from the rear end of the extending portion 28. It is easy to convey to the front end, and the length of the extending portion 28 (the length along the virtual curve 21E) is 50% or less of the length L20 along the virtual curve 21E (the length of the extending portion 28 (“virtual” (The length along the straight line 20E ′) may be 50% or less of the length L20 ′ along the virtual straight line 20E ′ ”), and therefore the angle α21 of the straight line portion 22 with respect to the tangent line 25E is smaller than 45 degrees. However, the length from the vertex of the curved portion 24 to the virtual curve 21E It is possible to ensure a long length of the line section 22 to the extent that peeling does not occur.

  In the range from the end m11 to the contact point m14, the length of the curved portion along the zipper opening direction is longer than the length of the straight portion along the zipper opening direction (specifically, the opening of the curved portion). (The length along the direction is more than twice the length along the opening direction of the straight portion), so that the unevenness in the notch 10 can be made inconspicuous, and the breaking force is smoothly transmitted to the extending portion 18. be able to. That is, if the diameter of the curved portion 14 or the curved portion 16 is reduced, another straight linear portion is provided between the curved portion 14 and the curved portion 16, and the other linear portion and the linear portion 12 When the ratio of the length along the opening direction increases, the configuration from the end m11 to the contact point m14 becomes close to an isosceles triangle, and the unevenness in the notch 10 is conspicuous, and the unevenness in the fractured surface when the zipper A is opened However, in this embodiment, since the ratio of the curved portion is large, the unevenness can be made inconspicuous, and thereby the appearance of the cut surface can be improved. Further, by increasing the proportion of the curved portion, the diameter of the circular arc of the curved portion 14 or the curved portion 16 can be increased, and accordingly, the breaking force can be smoothly transmitted to the extending portion 18, and thereby the zipper A Can be smoothly broken. In addition, when the length along the opening direction of the curved portion is shorter than the length along the opening direction of the straight portion, the diameters of the arcs of the curved portion 14 and the curved portion 16 are reduced accordingly, so that the break is smoothly broken. It becomes difficult. Similarly, in the range from the end m21 to the contact point m24, the length of the curved portion along the zipper opening direction is longer than the length of the straight portion along the zipper opening direction (specifically, the curved portion Since the length along the zipper opening direction is twice or more the length along the opening direction of the straight portion), the unevenness in the cut 20 is not noticeable, and the appearance of the cut surface can be improved, Further, by smoothly transmitting the breaking force to the extending portion 28, the zipper A can be smoothly broken.

  Even when the zipper opening direction is curved, the length (length) along the virtual curve 11E of the curved portion (that is, the curved portion 14 and the curved portion 16) in the range from the end m11 to the contact point m14. (The sum of the length L12 and the length L13) is longer than the length (length L11) along the virtual curve 11E of the straight line portion (that is, the straight line portion 12) (specifically, the virtual curve 11E ( That is, the length along the zipper opening direction is at least twice the length along the imaginary curve 11E of the straight line portion (the length along the imaginary straight line 10E ′ of the curve portion (the length L12 and The sum of the length L13) is longer than the length (length L11) along the virtual straight line 10E ′ of the straight line portion (specifically, the length along the virtual straight line 10E ′ of the curved line portion is equal to the straight line portion) More than twice the length along the virtual straight line 10E ' Therefore, it is possible to improve the appearance of the cut surface by making the concavity and convexity in the notch 10 inconspicuous, and by smoothly transmitting the breaking force to the extending portion 18, the zipper can be smoothed. Can break. Similarly, in the range from the end m21 to the contact point m24, the length along the virtual curve 21E of the curved portion (that is, the curved portion 24 and the curved portion 26) (the sum of the length L22 and the length L23) is The length along the virtual curve 21E (that is, the zipper opening direction) of the curved portion is longer than the length (length L21) along the virtual curve 21E of the straight portion (that is, the straight portion 22). Is more than twice the length of the straight line portion along the virtual curve 21E (the length of the curved line portion along the virtual straight line 20E ′ (the sum of the length L22 and the length L23) is It is longer than the length (length L21) along the virtual straight line 20E ′ (specifically, the length along the virtual straight line 20E ′ of the curved portion is the length along the virtual straight line 20E ′ of the straight portion). It may be more than twice)))) By inconspicuous definitive irregularities, it is possible to improve the appearance of the cut surface, also by transferring smoothly breaking force to the extended portion 18 can be broken zipper smoothly.

  Moreover, since it forms so that the direction of a notch may be switched smoothly as mentioned above in the boundary of each part which comprises the notches 10 and 20, the zipper A can be fractured | smoothed smoothly.

  Moreover, since the component part 11 which consists of the linear part 12, the curved part 14, and the curved part 16 and the linear part 22, the curved part 24, and the curved part 26 are provided, the blank in which the zipper A was formed is provided. On the other hand, when a force is applied in a direction perpendicular to the surface of the blank, breakage of the cut lines A1 and A2 can be reduced.

  That is, when the area of the band-shaped part 40 is pressed, the band-shaped part 40 can be prevented from sinking due to a range in which the length between the component part 11 and the component part 21 becomes shorter as the distance from the pressed area increases. It is possible to prevent breakage and chain of breakage.

  That is, in FIG. 8, the region R1 between the pair of cuts 10-1 and 10-2 and the pair of cuts 20-1 and 20-2 adjacent to each other in the zipper opening direction in the region between the cut line A1 and the cut line A2. When the gap between the cut 10-1 and the cut 10-2 is broken and the gap between the cut 20-1 and the cut 20-2 is broken, the direction from the region R1 along the zipper opening direction is The center position R1-1 of the pressed portion sinks in the vertical direction, but at the positions R1-2 and R1-3 shifted from the center position R1-1, the center position R1- Since there is a difference in height between 1 and the area that has not been pushed, it tries to sink diagonally.

  Then, on the X2 side from the region R1, in the range from the vertex of the curved portion 14 in the cut 10-2 to the contact point m14 on the X2 side (right side), the belt-like portion 40 is a region on the Y2 side from the belt-like portion 40. Since it is pushed in an oblique direction with respect to 42 (the lower right direction in FIG. 8B), it is possible to restrict the region 42 from blocking the movement of the band 40 and sinking the band 40. Similarly, in the range from the apex of the curved portion 24 in the cut 10-2 to the contact point m24 on the X2 side, the belt-like portion 40 is oblique to the region 44 on the Y1-side of the belt-like portion 40 (FIG. 8 ( In (d), since it is pushed in the lower right direction), it is possible to restrict the region 44 from blocking the movement of the band 40 and sinking the band 40.

  Further, on the X1 side from the region R1, the belt-like portion 40 is oblique to the region 42 on the Y2 side from the belt-like portion 40 in the range on the X1 side from the vertex of the curved portion 14 in the cut 10-1 (FIG. 8). In (c), since it is pushed in the lower left direction), it is possible to restrict the region 42 from blocking the movement of the band 40 and sinking the band 40. Similarly, in the range on the X1 side from the apex of the curved portion 24 in the cut 20-1, the belt-like portion 40 is oblique with respect to the region 44 on the Y1 side of the belt-like portion 40 (lower left direction in FIG. 8E). Therefore, the region 44 can block the movement of the belt-like portion 40 and restrict the sinking of the belt-like portion 40.

  Therefore, the range (that is, the length between the constituent parts 11 and 21 is the region R1) to the end m11 on the X1 side of the vertices of the curved parts 14 and 24 in the constituent parts 11 and 21 of the cuts 10-1 and 20-1. And a range closer to the X1 side than the vertices of the curved portions 14 and 24 in the components 11 and 21 of the cuts 10-2 and 20-2 (that is, the length between the components 11 and 21 is shorter). (The range that becomes shorter as the distance from the region R1 increases), the sinking of the band-shaped portion 40 can be restricted, so that the gap between the cut 10-1 and the cut 10-2 is broken and the gap between the cut 20-1 and the cut 20-2. Even if the gap between the cuts is broken, the next adjacent gaps (the gaps between the cuts 10-1 and 20-1 and the cuts 10-0 and 20-0, and the cuts 10-2 and 20-2 and the cuts 10-3 and 20 -3) is prevented from breaking It can, it is possible to prevent the chain of clearance of fracture.

  Further, in the belt-like portion 40, even when a region where the cut 10-2 and the cut 20-2 are opposed to each other (for example, the region R2 in FIG. 8) is pressed, the length between the constituent portions 11 and 21 is separated from the region R2. Accordingly, it is possible to regulate the sinking of the belt-shaped portion 40 by a range that becomes shorter (as it is separated in the direction along the zipper opening direction (X1-X direction)).

  That is, in FIG. 8, when a region R2 that is a region where the cuts 10-2 and 20-2 are opposed (particularly, a region including a position where the contact point m14 and the contact point m24 face each other) is pressed, the region R2 Further, on the X1 side, the range on the X2 side in FIG. 8 from the vertices of the constituent portions 11 and 21 (the vertices of the curved portions 14 and 24) in the cuts 10-2 and 20-2 increases as the distance from the region R2 increases. , 21 cannot be restricted by the regions 42 and 44 from sinking the band-like portion 40, but the end portions m11 and m21 are located on the X1 side (left side) from the apex of the constituent portions 11 and 21. Since the length between the constituent portions 11 and 21 decreases as the distance from the region R2 increases, the band portion 40 can be prevented from sinking, and the next adjacent gap (the notches 10-2 and 20-2) can be controlled. And incision 10-1 Can gap between 20-1) can be prevented from breaking, it is possible to prevent the chain of clearance of fracture.

  When the region R2 is pressed, even if the gap between the cuts 10-2 and 10-3 and the gap between the cuts 20-2 and 20-3 are broken on the X2 side from the region R2, the cut 10-3 , 20-3, since the length between the contact points m14 and m24 on the X2 side in FIG. 8 from the top of the component parts 11 and 21 on the X2 side becomes shorter as the distance from the region R2 increases. It is possible to prevent breakage of the gap with the notches adjacent to 10-3 and 20-3 in the zipper opening direction.

  Even when the curved portions 14 and 24 and the curved portions 16 and 26 are elliptical arcs, as the length between the constituent portion 11 and the constituent portion 21 increases from the pressed region (direction along the zipper opening direction (X1- Since there is a range that becomes shorter as it moves away in the (X direction), it is possible to regulate the sinking of the belt-like portion 40.

  Even when the zipper opening direction is curved, when the area of the belt-like portion (the belt-like portion between the cut line A1 ′ and the cut line A2 ′) is pushed, the length between the constituent parts 11 and 21 is pushed. It is possible to restrict the band-like portion from sinking due to a range that becomes shorter as the distance from the region is increased, and it is possible to prevent breakage of the gap and chain of breakage.

  Further, even when the region outside the belt-like portion 40 is pressed, the length between the virtual straight line passing through the pressed region along the zipper opening direction and the component parts 11 and 21 decreases as the distance from the region increases. In such a range, it is possible to prevent the outer region from sinking, so that breakage of the gap and chain of breaks can be prevented.

  For example, in FIG. 9, a region (for example, region R3) between a pair of notches (for example, notches 20-1 and 20-2) adjacent to each other in the zipper opening direction is pressed in the region outside the belt-shaped portion 40. In this case, in the range where the length between the imaginary straight line 44E along the zipper opening direction and the component portion 21 becomes shorter as the distance from the region decreases, the outer region can be regulated from sinking. Breakage of breakage can be prevented.

  For example, when the region R3 is pressed, even if the gap between the cut 20-1 and the cut 20-2 is broken, the X1 side from the region R3 is closer to the X1 side than the contact point m24 of the cut 20-1. In the range up to the apex of the component portion 21, the outer region 44 is pushed obliquely with respect to the strip portion 40 (in the lower left direction in FIG. 9C), so that the strip portion 40 blocks the movement of the region 44. Similarly, the region 44 can be prevented from sinking. Similarly, on the X2 side from the region R3, in the range from the end m21 of the cut 20-2 to the apex of the component portion 21 on the X2 side, the region 44 is outside. 44 is pushed obliquely with respect to the belt-like portion 40 (in the lower right direction in FIG. 9B), it is possible to restrict the belt-like portion 40 from blocking the movement of the region 44 and to sink the region 44.

  Further, when the region R4 outside the region where the notches 10-2 and 20-2 are opposed to each other is pressed in the belt-like portion 40, the X1 side from the region R4 is X1 more than the contact point m14 of the notch 20-2. In the range up to the apex of the component portion 21 on the side, the outer region 44 is pushed obliquely (lower left direction) with respect to the strip portion 40, so that the strip portion 40 blocks the movement of the region 44 and the region 44 sinks. Can be regulated. Further, on the X2 side from the region R4, even if the gap between the notch 20-2 and the notch 20-3 is broken, the range from the end m21 of the notch 20-3 to the apex in the component 21 on the X2 side. Then, since the outer region 44 is pushed obliquely (downward to the right) with respect to the belt-like portion 40, the belt-like portion 40 can block the movement of the region 44 and restrict the region 44 from sinking.

  Even when the curved portions 14 and 24 and the curved portions 16 and 26 are elliptical arcs, the length between the virtual straight line passing through the pressed region and the constituent portions 11 and 21 along the zipper opening direction in the virtual straight line passes through the region. Since there is a range that becomes shorter as the distance from the center increases, the outer region can be prevented from sinking.

  Even when the zipper opening direction is a curved line, a virtual curve passing through the pressed area in the range of the components 11 and 21 along the zipper opening direction (virtual curve parallel to the virtual curves 11E and 21E) In the range in which the length between the constituent parts 11 and 21 decreases as the distance from the region increases, the outer region can be prevented from sinking, so that breakage of the gap and chain of breaks can be prevented.

  In addition, since the straight portions 12 and 22 are formed in a straight line shape, the breaking force can be easily transmitted to the curved portions 14 and 24 so that peeling does not easily occur, and the zipper can be smoothly broken. That is, if the straight line portion 12 has a curved shape that bends in the left direction and the straight line portion 22 has a curved shape that bends in the right direction, in these curved portions, the breaking force increases toward the rear side. Therefore, depending on the position where the center of the breaking force at the curved portion is transmitted, the angle of contact between the breaking force and the curved portion differs greatly, and the impact when the breaking force is transmitted. As a result, the zipper cannot be broken smoothly. Further, if the straight line portion 12 has a curved shape that bends in the right direction and the straight line portion 22 has a curved shape that bends in the left direction, the angle (tangential line) to the direction of the breaking force becomes closer to the tip position of the curved portion. The angle between the contact point in the curved portion and the breaking force is greatly different, and the impact when the breaking force is transmitted is felt. Since there is a difference in the magnitude of the impact when the is transmitted, the zipper cannot be broken smoothly.

  According to the straight portions 12 and 22, the breaking force transmitted from the previous notch does not go outward as far as the rear side, so that the breaking force is easily transmitted to the curved portions 14 and 24. , 22 does not greatly change the breaking force and the angle of the contact point in the linear portion, so there is little possibility that a difference in the magnitude of an extremely small impact when the breaking force is transmitted to the linear portions 12, 22 is small. It can be smoothly broken. This also applies to each embodiment described later.

  For example, an example in which the zipper A is applied to a paper box is as shown in FIGS. 14 and 15, and the paper box (which may be a box, a carton, or a packaging box) P shown in FIGS. It has a sleeve-like portion 105, a bottom surface portion 150, a lid portion 192, an insertion piece portion 194, and flap portions 196 and 198.

  The paper box P is formed by a single sheet-like blank (specifically, a cardboard blank (for example, a thin cardboard blank), which may be another paper blank such as a cardboard blank). Has been. That is, the paper box P is a paper box such as a cardboard material (particularly, a double-sided cardboard material). Note that the direction of the center step in the double-sided cardboard is the direction shown in the circle shown in FIG. 15 (the direction perpendicular to the lower side of the left side surface portion 130 constituting the sleeve-like portion 105). The direction may be another direction.)

  The sleeve-like part 105 has a front part 110, a right side part 120, a left side part 130, a back part 140, and a glue margin part 142, and constitutes a side part of the paper box P. The margin portion 142 is bonded to the end portion on the back side of the right side surface portion 120 (specifically, the inner surface of the end portion on the back side).

  The bottom surface 150 is a so-called one-touch bottom, and includes a first piece 160, a second piece 170, a third piece 180, and a fourth piece 190.

  The second piece 170 is partitioned into a main body part 172 and a tip part 174 via a broken line 170-1. A notch 172 a is formed on the distal end 174 side of the distal end of the main body 172 so as to be engaged with the other main body 182. The upper surface of the distal end portion 174 is bonded to the lower surface of the fourth piece portion 190. When the paper box P is in the folded state, the second piece 170 is folded back via the broken line 170-1.

  The third piece 180 is divided into a main body 182 and a tip 184 via a broken line 180-1. A notch 182 a is formed on the distal end 184 side of the distal end of the main body 182 so as to be engaged with the other main body 172. The upper surface of the distal end portion 184 is bonded to the lower surface of the first piece portion 160. When the paper box P is in a folded state, the third piece 180 is folded back through the broken line 180-1.

  Two zippers A are formed in the paper box P. One zipper A-1 is formed from the center in the left-right direction of the front portion 110 toward the upper end on the back side of the right side portion 120, and the other zipper A- 2 is formed from the center in the left-right direction of the front part 110 toward the upper end on the back side of the left side part 130. Both the zippers A-1 and A-2 have the same configuration as the zippers A.

  In order to break the zipper A-1, the piece 30 of the zipper A-1 is raised to the front, pinched by hand, pulled to the front with respect to the front portion 110, and then pulled to the front with respect to the right side portion 120. In order to break A-2, the piece 30 of the zipper A-2 is raised to the front, pinched by hand, pulled to the front with respect to the front part 110, and then pulled to the front with respect to the left side part 130. As described above, the zippers A-1 and A-2 are broken, and the upper region of the left side surface portion 130 and the flap portion 198, the upper region of the front surface portion 110, the upper region of the right side surface portion 120 and the flap portion 196 are formed. Separate from the paper box P.

  Next, a cut line B1 as a paper box cutting structure according to the present invention is configured as shown in FIG. 16, and a plurality of cuts 10 are linearly arranged in a row at intervals. The line B1 has the same configuration as the cut line A1 in the first embodiment (the cut line B1 shown in FIG. 16 has the same configuration as the cut line A1 shown in FIGS. 1 to 3 of the first embodiment). The cuts 10 are arranged in a row with a gap therebetween, and the cuts 10 have the same configuration as the cuts 10 in the first embodiment, and thus detailed description thereof is omitted. That is, the notch 10 has a straight portion 12, a curved portion 14, a curved portion 16, and an extending portion 18.

  When using the cut line B1, the cut line opening direction (also referred to as "cut line breaking direction") is the direction from the X1 side to the X2 side in FIG. 16, the X1 side is the front side in the cut line opening direction, The X2 side is the rear side in the cut line opening direction. The break line opening direction of the present embodiment and the zipper opening direction of Embodiment 1 are the same direction, and instead of the zipper opening direction of Embodiment 1, it is the break line opening direction. FIG. 16 shows a case where the opening direction of the cut line is a straight line (when the cut line is formed in a straight line, the cut line may be formed in a straight line).

  When the opening direction of the cut line B1 is a straight line (when the cut line B1 is formed in a straight line), the cut line B1 has the same configuration as the cut line A1 in the first embodiment. When the opening direction of the line B1 is curved (when the cut line B1 is formed in a curved line) (that is, when the cut 10 in FIG. 16 is arranged in a curved line), the cut line B1 is The configuration is the same as the cut line A1 ′ in Example 1.

  In addition, the cut line B2 as the paper box cutting structure according to the present invention is configured as shown in FIG. 17, and a plurality of cuts 20 are linearly arranged in a row at intervals. B2 has the same configuration as the cut line A2 in the first embodiment (the cut line B2 shown in FIG. 17 has the same configuration as the cut line A2 shown in FIGS. 1, 2, and 5 of the first embodiment). A plurality of cuts 20 are arranged in a line with a space therebetween, and the cuts 20 have the same configuration as the cuts 20 in the first embodiment, and thus detailed description thereof is omitted. That is, the cut 20 has a straight portion 22, a curved portion 24, a curved portion 26, and an extending portion 28.

  When using the cut line B2, the cut line opening direction (also referred to as "break line breaking direction") is the direction from the X2 side to the X1 side in FIG. 17, the X2 side is the front side in the cut line opening direction, The X1 side is the rear side in the cut line opening direction. The break line opening direction of the present embodiment and the zipper opening direction of Embodiment 1 are the same direction, and instead of the zipper opening direction of Embodiment 1, it is the break line opening direction. FIG. 17 shows a case where the opening direction of the cut line is a straight line (when the cut line is formed in a straight line, the cut line may be formed in a straight line).

  When the opening direction of the cut line B2 is a straight line (when the cut line B2 is formed in a straight line), the cut line B2 has the same configuration as the cut line A2 in the first embodiment. When the opening direction of the line B2 is curved (when the cut line B2 is formed in a curved line) (that is, when the cut 20 in FIG. 17 is arranged in a curved line), the cut line B2 is The configuration is the same as the cut line A2 ′ in Example 1.

  Here, in the case of the cut line B1 or the cut line B2, the same effect as in the first embodiment can be obtained.

  That is, in the cut line B1, the end m11 is located on the virtual straight line 10E, and the extending part 18 is on the virtual straight line 10E, so that the breaking force from the extending part 18 is transmitted to the end m11. In addition, even when the center of the breaking force from the rear end of the extending portion 18 faces outward, the straight portion 12 and the curved portion 14 are provided, so that the breaking force can be received, and the cut line B1 is It can be broken smoothly. Further, since the peeling is hardly caused by receiving the breaking force by the straight portion 12 or the curved portion 14, the appearance of the cut surface can be improved. Similarly, in the cut line B2, the end m21 is located on the imaginary straight line 20E, and the extending part 28 is on the imaginary straight line 20E, so that the breaking force from the extending part 28 is applied to the end m21. Even when the center of the breaking force from the rear end of the extending portion 28 is directed outward, the straight portion 22 and the curved portion 24 are provided, so that the breaking force can be received. The line B2 can be broken smoothly. Further, since the peeling is hardly caused by receiving the breaking force by the straight portion 22 or the curved portion 24, the appearance of the cut surface can be improved.

  Even when the opening direction of the cut line is curved, the end m11 is located on the virtual curve 11E, and the extending portion 18 is on the virtual curve 11E, so that the breaking force from the extending portion 18 is Even when the center of the breaking force from the rear end of the extending portion 18 faces outside, the straight portion 12 and the curved portion 14 are provided so that the breaking force can be received. Therefore, the cut line can be smoothly broken and the appearance of the cut surface can be improved. Similarly, since the end m21 is located on the virtual curve 21E and the extending part 28 is on the virtual curve 21E, the breaking force from the extending part 28 is easily transmitted to the end m21. Even when the center of the breaking force from the rear end of the portion 28 is directed outward, the breaking force can be received because the straight portion 22 and the curved portion 24 are provided, and thus the break line is smoothly broken. And the appearance of the cut surface can be improved.

  In the cut line B1, the end m11 is located on the virtual straight line 10E, and the extending part 18 is on the virtual straight line 10E, so that the breaking force from the extending part 18 is easily transmitted to the end m11. Moreover, in the notch 10, since it forms in the protruding shape by the linear part 12, the curved part 14, and the curved part 16, the appearance of a cut surface can be improved. Similarly, in the cut line B2, the end m21 is located on the virtual straight line 20E, and the extending part 28 is on the virtual straight line 20E, and the breaking force from the extending part 28 is transmitted to the end m21. In addition, the cut 20 is formed in a protruding shape by the straight portion 22, the curved portion 24, and the curved portion 26, so that the appearance of the cut surface can be improved.

  Even when the opening direction of the cut line is curved, the end m11 is located on the virtual curve 11E, and the extending part 18 is on the virtual curve 11E, and the breaking force from the extending part 18 is the end. It is easy to be transmitted to the part m11, and the cut 10 is formed in a projecting shape by the straight part 12, the curved part 14, and the curved part 16, so that the appearance of the cut surface can be improved. Similarly, the end m21 is located on the imaginary curve 21E, and the extending portion 28 is on the imaginary curve 21E, so that the breaking force from the extending portion 28 is easily transmitted to the end m21, and the notch 20 In FIG. 3, since the straight portion 22, the curved portion 24, and the curved portion 26 are formed in a projecting shape, the appearance of the cut surface can be improved.

  In addition, since the angle α11 formed by the straight line portion 12 and the virtual straight line 10E is smaller than 45 degrees in the cut line B1, the impact when the breaking force from the previous notch 10 is transmitted to the straight line portion 12 is extremely small. Since the angle α12 is larger than 90 degrees, the breaking force from the straight line portion 12 can be smoothly transmitted to the extending portion 18, and the cut line B1 can be smoothly broken. Similarly, since the angle α21 formed by the straight line portion 22 and the virtual straight line 20E is smaller than 45 degrees in the cut line B2, the impact when the breaking force from the previous notch 20 is transmitted to the straight line portion 22 is extremely small. Further, since the angle α22 is larger than 90 degrees, the breaking force from the straight line portion 22 can be smoothly transmitted to the extending portion 28, and thus the cut line B2 can be smoothly broken.

  Even when the cut line opening direction is curved, the angle α11 with respect to the tangent line 15E of the virtual curve 11E at the end m11 of the straight line portion 12 is smaller than 45 degrees, and the angle α12 is 90 degrees. Therefore, the breaking force from the straight line portion 12 can be smoothly transmitted to the extending portion 18, so that the cut line can be smoothly broken. Similarly, the angle α21 with respect to the tangent line 25E of the virtual curve 21E at the end m21 of the straight line portion 22 is an angle smaller than 45 degrees, and the angle α22 is larger than 90 degrees. The breaking force can be smoothly transmitted to the extending portion 28, and thus the cut line can be smoothly broken.

  Further, in the cut line B1, the length of the extending portion 18 is 30% or more of the length L10, so that the breaking force is changed from the rear end (that is, the end portion m15) of the extending portion 18 to the straight line of the next notch 10. It becomes easy to transmit to the front end of the part 12 (that is, the end part m11), and the length α of the extending part 18 is 50% or less of the length L10, whereby the angle α11 of the straight part 12 with respect to the virtual straight line 10E is 45. The length L15 from the apex of the curved portion 14 to the virtual straight line 10E and the length of the straight portion 12 can be ensured to be long enough to prevent peeling while being smaller than the degree. In addition, if peeling does not occur, the appearance of the cut surface does not deteriorate, and the zipper can be smoothly broken. Similarly, when the length of the extending portion 28 is 30% or more of the length L20, the breaking force is applied from the rear end (that is, the end portion m25) of the extending portion 28 to the front end of the straight portion 22 of the next cut 20. (That is, the end portion m21) can be easily transmitted, and the length α of the extending portion 28 is 50% or less of the length L20, so that the angle α21 of the straight portion 22 with respect to the virtual straight line 20E is smaller than 45 degrees. However, the length L25 from the apex of the curved portion 24 to the virtual straight line 20E and the length of the straight portion 22 can be secured long enough to prevent peeling.

  Even when the cut line opening direction is curved, the length of the extending portion 18 (the length along the virtual curve 11E) is 30% or more of the length L10 along the virtual curve 11E (the extending portion 18). (“The length along the virtual straight line 10E ′) may be 30% or more of the length L10 ′ along the virtual straight line 10E ′”). Is easily transmitted to the front end of the straight portion 12 of the next cut 10, and the length of the extending portion 18 (the length along the virtual curve 11E) is 50% or less of the length L10 along the virtual curve 11E. (The length of the stretched portion 18 (“the length along the virtual straight line 10E ′) may be 50% or less of the length L10 ′ along the virtual straight line 10E ′”) While the angle α11 with respect to 15E is smaller than 45 degrees, The length of the length or the linear part 12 from a point to the virtual curve 11E may be secured long enough to peeling does not occur. Similarly, the length of the extending portion 28 (the length along the virtual curve 21E) is 30% or more of the length L20 along the virtual curve 21E (the length of the extending portion 28 (in the “virtual straight line 20E ′”). The length along the imaginary straight line 20E ′ may be 30% or more of the length L20 ′ ”), and the breaking force is applied to the straight portion 22 of the next cut 20 from the rear end of the extending portion 28. It is easy to convey to the front end, and the length of the extending portion 28 (the length along the virtual curve 21E) is 50% or less of the length L20 along the virtual curve 21E (the length of the extending portion 28 (“virtual” (The length along the straight line 20E ′) may be 50% or less of the length L20 ′ along the virtual straight line 20E ′ ”), and therefore the angle α21 of the straight line portion 22 with respect to the tangent line 25E is smaller than 45 degrees. However, the length from the vertex of the curved portion 24 to the virtual curve 21E It is possible to ensure a long length of the line section 22 to the extent that peeling does not occur.

  Further, in the range from the end portion m11 to the contact point m14, the length along the cut line opening direction of the curved portion is longer than the length along the cut line opening direction of the straight portion (specifically, the curved portion The length along the opening direction of the straight line portion is more than twice the length along the opening direction of the straight portion), so that the appearance of the cut surface can be improved by making the irregularities in the notch 10 inconspicuous In addition, the break line can be smoothly broken by smoothly transmitting the breaking force to the extending portion 18. Similarly, in the range from the end m21 to the contact point m24, the length along the cut line opening direction of the curved portion is longer than the length along the cut line opening direction of the linear portion (specifically, the curve Since the length along the opening direction of the cut line of the portion is more than twice the length along the opening direction of the straight portion), the appearance of the cut surface is improved by making the unevenness in the cut 20 inconspicuous In addition, by smoothly transmitting the breaking force to the extending portion 28, the cut line can be smoothly broken.

  In addition, even when the opening direction of the cut line is curved, the length along the virtual curve 11E of the curved portion (that is, the curved portion 14 and the curved portion 16) (in the range from the end portion m11 to the contact point m14) ( The sum of the length L12 and the length L13) is longer than the length (length L11) along the virtual curve 11E of the straight line portion (that is, the straight line portion 12) (specifically, the virtual curve 11E of the curve portion). That is, the length along the cut line opening direction is at least twice the length along the imaginary curve 11E of the straight line portion (the length (length) along the imaginary straight line 10E ′ of the curve portion. (The sum of L12 and length L13) is longer than the length (length L11) along the virtual straight line 10E ′ of the straight line portion (specifically, the length along the virtual straight line 10E ′ of the curved line portion is More than twice the length of the straight line along the virtual straight line 10E ′ Therefore, it is possible to improve the appearance of the cut surface by making the concavity and convexity in the notch 10 inconspicuous, and by smoothly transmitting the breaking force to the extending portion 18, the cut line can be smoothed. Can be broken. Similarly, in the range from the end m21 to the contact point m24, the length along the virtual curve 21E of the curved portion (that is, the curved portion 24 and the curved portion 26) (the sum of the length L22 and the length L23) is The length along the virtual curve 21E (that is, the zipper opening direction) of the curved portion is longer than the length (length L21) along the virtual curve 21E of the straight portion (that is, the straight portion 22). Is more than twice the length of the straight line portion along the virtual curve 21E (the length of the curved line portion along the virtual straight line 20E ′ (the sum of the length L22 and the length L23) is It is longer than the length (length L21) along the virtual straight line 20E ′ (specifically, the length along the virtual straight line 20E ′ of the curved portion is the length along the virtual straight line 20E ′ of the straight portion). It may be more than twice)))) By inconspicuous definitive irregularities, it is possible to improve the appearance of the cut surface by transferring a breaking force smoothly extending portion 28, can break the score line smoothly.

  Further, the notch 10 is provided with a constituent part 11 composed of a straight line part 12, a curved part 14 and a curved part 16, and the notch 20 is provided with a constituent part 21 composed of a straight part 22, a curved part 24 and a curved part 26. Therefore, when a force is applied in a direction perpendicular to the blank surface with respect to the blank in which the cut line B1 or the cut line B2 is formed, that is, the breakage of the cut lines B1 and B2 can be reduced. it can.

  In other words, in a range where the length between the virtual straight line (or virtual curve) along the cut line opening direction and the component parts 11 and 21 is a virtual straight line passing through the pressed area and becomes shorter as the distance from the area increases, Since the area on the side of the area can be prevented from sinking, breakage of the gap and chain of breaks can be prevented.

  Moreover, since it forms so that the direction of a notch may be switched smoothly as mentioned above in the boundary of each part which comprises the notches 10 and 20, the cut line B1 and B2 can be fractured | smoothed smoothly.

  An example in which the cut line B1 and the cut line B2 are applied is as shown in FIGS. 18 to 24. A paper box (which may be a box, a carton, or a packaging box) Q includes a sleeve-like portion 205, a bottom portion, and the like. 400, flap portions 320 and 330, and lid portions 310 and 340.

  Here, the sleeve-like portion 205 includes a front portion 210, a right side portion 220 connected from the side portion on the right side surface of the front portion 210 via a broken line C <b> 20, and a side portion on the left side surface side of the front portion 210. A left side surface portion 230 provided continuously via a polygonal line C30, a back surface portion 240 provided continuously from a side portion on the back side of the left side surface portion 230 via a broken line C40, and a polygonal line from a side portion on the right side surface of the back surface portion 240. And an adhesive margin part 249 provided continuously through C49. The polygonal line C20, the polygonal line C30, the polygonal line C40, and the polygonal line C49 are parallel to each other.

  The paper box Q is formed of a single sheet-like blank (specifically, a cardboard blank (for example, a thin cardboard blank), and may be another paper blank such as a cardboard blank). Has been. That is, the paper box Q is a paper box such as a cardboard material (particularly, a double-sided cardboard material). Note that the direction of the center step in the double-sided cardboard is the direction shown in the circle shown in FIG. 22 (the direction parallel to the broken lines C20, C30, C40). Good.)

  The front part 210, the right side part 220, the left side part 230, and the back part 240 have a square shape (specifically, a rectangular flat plate shape), and the front part 210, the right side part 220, the left side part 230, and the back part 240 are It has a vertically long rectangular shape.

  The front portion 210, the right side surface portion 220, the left side surface portion 230, and the back surface portion 240 have the same length in the vertical direction. That is, in the unfolded state of the paper box Q, the lower side of the front part 210, the lower side of the right side part 220, the lower side of the left side part 230, and the lower side of the rear part 240 are formed on the same straight line. The upper side of the right side part 220, the upper side of the left side part 230, and the upper side of the rear part 240 are formed on the same straight line.

  Further, in the lateral direction, the right side portion 220 and the left side portion 230 are formed to have the same length, and the front portion 210 and the rear portion 240 are formed to have the same length (may be substantially the same).

  The margin portion 249 is formed in a substantially trapezoidal shape, and is bonded to the inner surface of the end region on the back side of the right side surface 220. The glue margin 249 is continuously provided from the back surface portion 240, but may also be configured to be continuously provided from the back surface side end portion of the right side surface portion 220 and bonded to the right side surface end portion of the back surface portion 240. Good. Further, the margin portion 249 may be bonded to the outer surface of the end region on the back surface side of the right side surface portion 220.

  The sleeve-like portion 205 is provided with a cut line (may be a planned cutting line) K5 in a circumferential shape (may be circumferentially provided), and as shown in FIGS. The end portion is formed from the front portion 210, the left side portion 230, and the back portion 240 to the front end portion of the adhesive margin portion 249. That is, the cut line K5 is formed in an endless shape (or a loop shape). In the paper box Q, the lower part becomes the lower constituent part A-1 and the upper part becomes the upper constituent part A-2 via the cut line K5.

  The cut line K5 includes a cut line K10 formed on the front surface part 210, a cut line K20 formed on the right side part 220, a cut line K30 formed on the left side part 230, and a cut line formed on the back part 240. K40 and a cut line K49 formed in the margin part 249. The cut line K20 is continuously formed from the right side end portion of the cut line K10, the cut line K30 is formed continuously from the left side end portion of the cut line K10, and the cut line K40 is cut. The line K30 is continuously formed from the end portion on the back surface side, and the cut line K49 is formed continuously from the end portion on the right side surface side of the cut line K40. In the state where the glue margin part 249 is bonded to the back surface part 240, the end on the back side of the cut line K20 and the cut line K49 overlap, so the cut line K40 is separated from the back side end of the cut line K20. It can be said that it is formed continuously. The cut lines K10, K20, K30, and K40 are all formed by planned cutting lines. The cut line is provided circumferentially by the cut line K10, the cut line K20, the cut line K30, and the cut line K40.

Here, the cut line (first cut line) K10 is a cut line (first cut line central component) K11 formed in a substantially straight line in the left-right direction, and a right side from the right side end of the cut line K11. A left side of the cut line K11 and a cut line K12 formed substantially upward from an end opposite to the cut line K11 of the cut line formed obliquely above the surface side. A cut line K13 formed obliquely upward from the end of the left side to the left side, and a cut line K13 formed substantially upward from the opposite end of the cut line K11 formed obliquely above the cut line A cut line K14 formed from the upper end of K12 toward the right side of the front part 210, and a cut line K15 formed from the upper end of the cut line K13 toward the left side of the front part 210. And have. The cut line K12 and the cut line K14 constitute the first cut line right side surface constituting part, and the cut line K13 and the cut line K15 constitute the first cut line left side side constituting part. The cut line formed by the cut line K12 and the cut line K14 and the cut line formed by the cut line K13 and the cut line K15 are formed symmetrically (that is, symmetrical to the left and right lines). In addition, the cut line K10 is formed to be bilaterally symmetrical (that is, bilaterally symmetric). The cut lines K11, K12, and K13 are formed so that the cut line is substantially U-shaped.

  The cut line K11 is formed by arranging the cuts in a substantially straight line with an interval, and the cut line K12 is continuously formed from the right side end portion of the cut line K11. The cut line K11 is continuously formed from the left side end of the cut line K11, the cut line K14 is formed continuously from the end of the cut line K12 opposite to the cut line K11, and the cut line K15 is formed of the cut line K13. Is formed continuously from the end opposite to the cut line K11. The cut line K10 is formed symmetrically to the left and right lines.

  The cut line K11 is formed at a position slightly above the lower side of the front portion 210, and is formed at the center position of the front portion 210 in the left-right direction. The cut lines K12 and K14 are formed by arranging a plurality of cuts in a row with intervals, and the cut lines K13 and K15 are formed by arranging a plurality of cuts in a row with intervals. Yes.

  The cut line (second cut line) K20 includes a cut line (second cut line sub-component) K22 and a cut line (second cut line main component) K24. The cut line K22 is cut. It is formed continuously from the end portion on the right side surface of the line K14 (may be “continuously provided”, and the same applies to other cases), and becomes the upper side from the side portion on the front side of the right side portion 220 toward the back side. The cut line K24 is formed continuously from the rear side end of the cut line K22, and is formed in a lower direction as it goes to the back side.

  The cut lines K22 and K24 are formed by arranging a plurality of cuts in a row at intervals.

  The arrangement direction of the plurality of cuts in the cut line K22 is upward (ie, in the horizontal direction (for example, the direction of the lower side of the right side 220)) from the front end of the right side 220 to the back side. In contrast, the plurality of cuts in the cut line K24 are arranged in a straight line so that the disposition direction of the cut line K24 becomes lower from the back side end of the cut line K24 toward the back side (that is, the cut line K24). (Inclined obliquely downward) and is formed in a straight line. That is, the cut line K24 is formed in a straight line so as to become higher as it goes from the back side to the front side (that is, inclined obliquely upward with respect to the horizontal direction). In addition, as an inclination angle with respect to the lower side of the right side surface portion 220, the cut line K22 is formed larger than the cut line K24, and the cut line K24 is gently upward from the back side to the front side, and the cut line K22. Is upward at an angle larger than the cut line K24 from the front side to the back side. The cut line K22 is formed from the front side end of the cut line K24 to the side part on the front side of the right side part 220, and is formed so as to be lower as it goes to the front side.

  In addition, since it inclines with respect to the lower side of the right side surface part 220 so that the cut line K24 becomes an upper side as it goes to the front side from the back side, naturally between the lower right side part 222 and the back side area | region 227 in the cut line K24. The cut line K24-1 of the part is also inclined so as to be higher as it goes from the back side to the front side. Further, the cut line (second cut line main component) K24 is formed so as to be higher on the front side in the range from the contact point with the broken line C21 or the extended line of the broken line C21 at the cut line K24. ing.

  The length L24 in the front-rear direction from the front end of the cut line K24 to the back end (the length in the direction of the lower side of the right side 220) is from the front end of the cut line K22 to the back side. The length in the front-rear direction to the end (the length in the direction of the lower side of the right side portion 220) L22 is longer (that is, the length L24 is from the end on the back side to the front side of the right side portion 220. It has a length more than half of the length L20 in the front-rear direction to the end). Specifically, the length L22 is set to 1/4 to 1/3 of the length L20 (that is, the length L24 is set to 2/3 to 3/4 of the length L20). The length L24 may be formed to be 3 to 4 times the length L22.

  The length L24-1 in the front-rear direction of the cut line (first partial component) K24-1 between the lower right side surface portion 222 and the back side region 227 in the cut line K24 is 1/3 of the length L20 ( It may be set to approximately 1/3). In other words, the length of the cut line K24-1 in the front-rear direction is the same as the half of the length in the front-rear direction of the part of the cut line K20 other than the cut line K24-1 (may be substantially the same). That is, by setting the length L24-1 to 1/3 (may be approximately 1/3) of the length L20, the back side region 227 can be easily rotated with respect to the front side region 226, and the cut line K24. −1 is easy to break. The cut line K24-1 is a part of the cut line K24, and is a contact point between the cut line K24 and the broken line C21 (when the broken line C21 is not in contact with the cut line K24, the cut line K24 is connected with the cut line K24 that is an extension of the broken line C21). From the contact point) to the end on the back side of the cut line K24. The lower right side portion 222, the rear side region 227, and the polygonal line C21 will be described later.

  In the unfolded state of the paper box Q, a plurality of cuts are arranged in one straight line at the cut line K14 and the cut line K22.

  The cut line (third cut line) K30 has a cut line (third cut line sub-component) K32 and a cut line (third cut line main component) K34, and the cut line K32 is cut. The line K15 is formed continuously from the left side end of the line K15, and is formed in an upward direction from the front side to the back side of the left side 230. The cut line K34 is the back side of the cut line K32. It is formed continuously from the end of the head and is formed in a lower direction as it goes to the back side. That is, the cut line K30 is formed symmetrically with the cut line K20 (that is, formed in line symmetry in the unfolded state of the paper box Q), and the cut line K32 is formed symmetrically with the cut line K22, The cut line K34 is formed symmetrically with the cut line K24.

  The cut lines K32 and K34 are formed by arranging a plurality of cuts in a row at intervals.

  The disposition direction of the plurality of cuts in the cut line K32 is formed in a straight line so as to be upward (that is, inclined obliquely upward) from the front side end of the left side part 230 toward the back side. The arrangement direction of the plurality of cuts in the line K34 is formed in a straight line so as to become lower (that is, inclined obliquely downward) as it goes from the back side end of the cut line K32 to the back side. That is, the cut line K34 is formed in a straight line shape so as to be higher as it goes from the back side to the front side (that is, inclined obliquely upward). In addition, as an inclination angle with respect to the lower side of the left side surface portion 230, the cut line K32 is formed larger than the cut line K34, and the cut line K34 is gently upward from the back side to the front side, and the cut line K32 Is upward from the front side to the back side at an angle larger than the cut line K34. The cut line K32 is formed from the front side end part of the cut line K34 to the front side part of the left side surface part 230, and is formed to be lower as it goes to the front side.

  In addition, since it inclines with respect to the lower side of the left side surface part 230 so that the cut line K34 becomes an upper side as it goes to the front side from the back side, naturally between the lower right side surface part 232 and the back side area 237 in the cut line K34. The cut line K34-1 of the part is also inclined so as to be higher as it goes from the back side to the front side. In addition, the cut line (third cut line main component) K34 is formed so as to be higher on the front side in the range from the contact point with the broken line C31 or the extended line of the broken line C31 in the cut line K34. ing.

  The length L34 in the front-rear direction from the front end of the cut line K34 to the back end (the length in the direction of the lower side of the left side 230) is from the front end of the cut line K32 to the back side. The length in the front-rear direction to the end portion (the length in the direction of the lower side of the left side surface portion 230) L32 is formed (that is, the length L34 is from the rear side end portion of the left side surface portion 230 to the front side. It has a length more than half of the length L30 in the front-rear direction to the end). Specifically, the length L32 is set to 1/4 to 1/3 of the length L30 (that is, the length L34 is set to 2/3 to 3/4 of the length L30). The length L34 may be 3 to 4 times the length L32.

  Further, the length L34-1 in the front-rear direction of the cut line (second partial component) K34-1 between the lower right side surface part 232 and the back side region 237 in the cut line K34 is 1/3 of the length L30 ( It may be set to approximately 1/3). That is, the length of the cut line K34-1 in the front-rear direction is the same as (half of the length in the front-rear direction of the part other than the cut line K34-1 of the cut line K30). That is, by setting the length L34-1 to 1/3 (may be substantially 1/3) of the length L30, the back side region 237 can be easily rotated with respect to the front side region 236, and the cut line K34. −1 is easy to break. The cut line K34-1 is a part of the cut line K34, and is a contact point between the cut line K34 and the broken line C31 (in the case where the broken line C31 is not in contact with the broken line K34, the cut line K31 is connected with the cut line K34 of the extended line of the broken line C31. From the contact point) to the end of the cut line K34 on the back side. The lower left side 232, the back side region 237, and the polygonal line C31 will be described later.

  Thereby, the length more than half of the front-back direction in the cut line K20 and K30 can be fractured | ruptured by pulling the upper side structure part A-2 to upper side.

  In the unfolded state of the paper box Q, the cut line K15 and the cut line K32 are arranged in a single straight line.

  Further, the cut line (fourth cut line) K40 includes a cut line K41 formed linearly in the left-right direction, a cut line K42 formed from an end portion on the right side of the cut line K41, and a cut line K41. And a cut line K43 formed from the end portion on the left side surface side.

  The cut line K41 has a plurality of linear cuts arranged at intervals, and is formed in a perforated shape. The cut line K42 is continuously formed from the right side end portion of the cut line K41, and the cut line K43 is formed continuously from the left side end portion of the cut line K41. The cut line K40 is formed symmetrically on the left and right lines.

  The cut line K41 is formed at a position slightly below the center position in the up-down direction of the back surface portion 240, and is formed at the center position of the back surface portion 240 in the left-right direction.

  The cut line K42 is formed by arranging a plurality of cuts in a row with intervals, and the cut line K43 is formed by arranging a plurality of cuts in a row with intervals.

  The arrangement direction of the plurality of cuts in the cut line K42 is inclined upward (ie, obliquely upward as it goes from the cut line K41 side to the right side end part (cut line K24 side) of the back surface portion 240. The arrangement direction of the plurality of cuts in the cut line K43 is upward (ie, obliquely upward) from the cut line K41 side toward the left side end of the back surface part 240. It is formed in a straight line. That is, the cut lines K42 and K43 are formed so as to be inclined upward as they go to the outside of the back surface portion 240.

  The inclination angle of the cut line K42 with respect to the lower side of the back surface portion 240 is the same as the inclination angle of the cut line K24 with respect to the lower side of the right side surface 220 (may be substantially the same). The cut line K34 and the cut line K43 are arranged in a single straight line. In addition, the inclination angle of the cut line K43 with respect to the lower side of the back surface part 240 is the same as (or substantially the same as) the inclination angle of the cut line K34 with respect to the lower side of the left side surface part 230. Therefore, since the inclination angle of the adjacent cut line is the same, it can be broken very smoothly from the cut line K42 to the cut line K24, and can be broken very smoothly from the cut line K43 to the cut line K34. .

  The cut line K49 is formed in the glue margin part 249, is formed continuously from the end on the back side of the cut line K42, a plurality of linear cuts are formed at intervals, and the cut line K49. Is formed so as to be higher as it goes from the end portion on the back surface portion 240 side to the distal end side of the adhesive margin portion 249 (that is, inclined obliquely downward). The inclination angle of the cut line K49 with respect to the horizontal direction is the same as (or substantially the same as) the inclination angle of the cut line K42 with respect to the lower side of the back surface portion 240. The cut line K49 is formed so as to coincide with the notch of the rear side end of the cut line K24, and the cut line K49 is formed on the back side of the cut line K24 in a state where the adhesive margin part 249 is bonded to the right side part 220. The ends overlap. The cut line K49 may be formed by a single cut instead of a plurality of cuts provided at intervals.

  A pair of cut lines K44 and K45 are formed downward from the cut line K41 on both the left and right sides. That is, the cut line K44 is continuously provided from the vicinity of the right side end of the cut line K41 (may be the right side end of the cut line K41) and directed downward (to the lower side of the back surface 240). The cut line K45 is formed continuously from the vicinity of the end on the left side of the cut line K41 (may be the end on the left side of the cut line K41) and directed downward ( It is formed in a direction perpendicular to the lower side of the back portion 240. The cut line K44 and the cut line K45 are formed to have the same length, are formed in parallel to each other, and both are formed by linear cuts (continuous cuts). The cut line K44 and the cut line K45 are formed symmetrically via a center line (center line in the left-right direction) facing the up-down direction in the back surface portion 240. In addition, a fold line C41 connecting the lower end of the cut line K44 and the lower end of the cut line K45 is formed. Specifically, a ruled line is formed along the fold line C41 on the inner surface of the back surface portion 240. Note that the cut lines K44 and K45 may be formed not by cutting but by a planned cutting line. That is, the cut lines K44 and K45 may be formed by any of continuous cuts and planned cutting lines.

  Of the cuts forming a cut line in which a plurality of cuts are formed in a straight line by the cut line K14 and the cut line K22, the cut shown in the range 20G1 (part of the cut line K14 and the cut line K22) is formed by the cut 20. In the range 20G1, the cut line opening direction is linear.

  Of the cuts forming the cut line K24, the cut shown in the range 20G2 (the cut forming the cut line K24) is formed by the cut 20 and in the range 20G2, the cut line opening direction is linear. . Further, the cut line K42 is also linear in the cut line opening direction.

  Of the cuts forming a cut line in which a plurality of cuts are formed in a straight line with the cut line K15 and the cut line K32, the cut shown in the range 10G1 is formed by the cut 10, and in the range 10G1, the cut line opening direction Is straight.

  Of the cuts forming a cut line in which a plurality of cuts are linearly formed by the cut line K34 and the cut line K43, the cut shown in the range 10G2 is formed by the cut 10, and in the range 10G2, the cut line The opening direction is linear.

  Of the cuts forming a cut line in which a plurality of cuts are formed in a straight line by the cut line K42 and the cut line K49, the cut shown in the range 20G3 is formed by the cut 20, and in the range 20G3, the cut line opening direction Is straight.

  Further, a cut 20 is used for the cut line K42 between the right region 247 and the lower back surface part 242 in the cut line K4, and a cut 10 is used for the cut line K43 between the left region 248 and the lower back surface part 242 in the cut line K4. Is used.

  In the ranges 10G1 and 10G2, the notch 10 has the end m11 and the contact point m14 on the lower side (for example, the lower left side 232 side and the lower back surface 242 side), and the apex of the curved portion 14 on the upper side (for example, Upper left side 235 side, upper back side 245 side). In the ranges 20G1, 20G2, and 20G3, the notch 20 has the end m21 and the contact point m24 on the lower side (for example, the lower right side 222 and the lower back 242), and the apex of the curved portion 24 on the upper side ( For example, the upper right side 225 side and the upper back side 245 side) are provided.

  In the right side surface 220, the cut line K24-2 and the cut line K22 constitute a first specific cut line, and in particular, the part of the range 20G2 in the cut line K24-2 and the part of the range 20G1 in the cut line K22 are the first. One specific cut line is formed. The cut line K24 forms a first rising cut line, and the cut line K22 forms a first falling cut line. That is, the first specific cut line (that is, the part where the cut line opening direction in the cut line K24-2 is linear) is within the range from the back side end to the front side end of the first rising cut line. The first specific cut line (that is, the part where the cut line opening direction in the cut line K22 is linear) is provided in the first descending cut line. It is provided within the range from the back side end to the front side end (may be provided at least in any part of the range).

  Further, in the left side surface portion 230, the cut line K34-2 and the cut line K32 constitute a second specific cut line, and in particular, the portion of the range 10G2 in the cut line K34-2 and the range 10G1 in the cut line K32 are the second specified. Configure break lines. The cut line K34 forms a second rising cut line, and the cut line K32 forms a second falling cut line. That is, the second specific cut line (that is, the part where the cut line opening direction in the cut line K34-2 is linear) is within the range from the back side end to the front side end of the second rising cut line. The second specific cut line (that is, the part where the cut line opening direction in the cut line K32 is linear) is provided in the second descending cut line. It is provided within the range from the back side end to the front side end (may be provided at least in any part of the range).

  In the example of FIG. 22, the number of cuts 20 can be said to be 1 and 1/2 in each of the cut line K24-2 and the cut line K22, but it is provided at a finer pitch than in the case of FIG. A notch 20 may be provided. Similarly, in each of the cut line K34-2 and the cut line K32, it can be said that the number of the cuts 10 is 1 and 1/2, but it is provided at a finer pitch than in the case of FIG. 22, and two or more cuts 20 are provided. May be.

  As described above, the continuous cut line K5-1 from the end of the cut line K42 to the end of the cut line K41 through the cut lines K49, K20, K14 is formed, Further, a continuous cut line K5-2 is formed from the end of the cut line K43 on the cut line K41 side to the end of the cut line K13 through the cut lines K30 and K15 on the cut line K11 side. The opening direction at the cut line K5-1 is a direction from the end of the cut line K42 on the cut line K41 side to the end of the cut line K12 through the cut lines K49, K20, K14, and on the cut line K11 side. The opening direction of K5-2 is a direction from the end of the cut line K43 on the cut line K41 side through the cut lines K30 and K15 to the end of the cut line K13 on the cut line K11 side.

  Of the plurality of cuts constituting the cut line K5, in the ranges other than the ranges 10G1, 10G2, 20G1, and 20G2, the opening direction is not linear, so cuts of shapes other than the shapes of the cuts 10 and 20 are used. For example, the cuts at the boundary positions between the cut lines K12 and K13, the cut line K22 and the cut line K24, and the cut line at the boundary position between the cut line K32 and the cut line K34 are cuts obtained by modifying the cuts 10 or 20. Yes.

  Further, in the paper box Q, fold lines C42 and C43 are provided on the back surface portion 240, a fold line C21 is provided on the right side surface portion 220, and a fold line C31 is provided on the left side surface portion 230.

  That is, the fold line (first fold line) C42 is formed in a straight line obliquely upward from the position of the contact point of the cut line K41 and the cut line K44 toward the outside (right side) of the back surface portion 240, and above the broken line C42. The end is located at the corner of the upper right side of the back surface 240. Specifically, a ruled line is formed on the inner surface of the back surface portion 240 along the broken line C42.

  The broken line (second broken line) C43 is linearly formed obliquely upward from the position of the contact point between the broken line K41 and the broken line K45 toward the outside (left side surface) of the back surface portion 240, and above the broken line C43. The end is located at the corner of the upper left side of the back surface 240. Specifically, a ruled line is formed on the inner surface of the back surface portion 240 along the broken line C43.

  That is, the polygonal line C42 is formed from the corner at the upper right side of the back surface 240, and the polygonal line C43 is formed from the corner at the upper left side of the rear surface 240, and the polygonal line C42 as it goes toward the cut line K40. And the length between the broken lines C43 is shortened. The ruled line formed along the broken line C42 is formed from the upper right corner of the back surface 240 to the cut line K40. However, the ruled line may be spaced between the lower end of the ruled line and the cut line K40. Alternatively, a configuration may be adopted in which a gap is provided between the upper end of the ruled line and the corner of the upper right side of the back surface portion 240. That is, the ruled line (which may be the broken line C42) is the corner at the upper right side of the back surface 240 (first corner) and from the right side end of the cut line K40 to the left side end. Is formed in a direction between the first corner and the first intermediate position at a position between the first position and the first intermediate position (specifically, the position of the contact point between the cut line K41 and the cut line K44). That's fine.

  Similarly, the ruled line formed along the polygonal line C43 is formed from the upper left corner of the back surface 240 to the cut line K40, but there is a gap between the lower end of the ruled line and the cut line 240. The structure which provides may be sufficient, and the structure which provides a space | interval between the upper end of this ruled line and the corner | angular part of the left side upper end of the back surface part 240 may be sufficient. That is, the ruled line (which may be the broken line C43) is a corner (second corner) of the upper left side of the back surface 240 (from the left side to the right side of the cut line K40). And the second corner portion at a position between the middle position on the left side of the first middle position (second middle position) (specifically, the position of the contact point between the break line K41 and the break line K45). What is necessary is just to be formed in the direction which ties a 2nd intermediate position.

  Further, the broken line (third broken line) C21 is linearly formed obliquely upward from the midway position of the cut line K24 (that is, midway from the back end to the front end) toward the back. The upper end portion of the broken line C21 is located at the corner portion of the rear side upper end of the right side portion 220. In other words, the polygonal line C21 is formed from the corner at the upper end on the back side of the right side portion 220 toward the middle position of the cut line K24. Specifically, a ruled line is formed on the inner surface of the right side surface 220 along the broken line C21. The ruled line is formed from the upper end corner of the right side 220 to the middle of the cut line K24, but a space may be provided between the lower end of the broken line C21 and the cut line K24. You may provide a space | interval between an upper end and the corner | angular part of the back side upper end of the right side part 220. FIG.

  That is, one end of the ruled line is located at the upper corner of the back side of the right side 220, and the other end of the ruled line is located halfway along the cut line K24, but the ruled line is located on the right side 220. The corners on the upper side of the back surface and the cut line K24 may not be formed midway, and the end of the ruled line may be formed up to a midpoint toward the corner (that is, the corner of the ruled line). (A space is formed between the end portion on the portion side and the corner portion), and the end portion of the ruled line may be formed to a midway position toward the midway position of the cut line K24 (that is, A space is formed between an end portion on the middle position side of the cut line K24 of the ruled line and a middle position of the cut line K24). In other words, the ruled line (which may be the broken line C21) is located at a position between the upper corner (third corner) on the back side of the right side 220 and the middle position (third middle position) of the cut line K24. What is necessary is just to be linearly formed in the direction which connects the corner | angular part of back upper side of this, and the middle position of the cut line K24.

  Further, the broken line (fourth broken line) C31 is linearly formed obliquely upward from the midway position of the cut line K34 (that is, midway from the back side end to the front side end) toward the back side. The upper end of the polygonal line C31 is located at the corner of the rear side upper end of the left side portion 230. The polygonal line C31 is formed symmetrically with the polygonal line C21. In other words, the assembled paper box Q is formed on the left and right sides through a center plane (center plane in the left-right direction) facing in the front-rear direction. That is, the polygonal line C31 is formed from the corner at the upper end on the back surface side of the left side surface portion 230 toward the middle position of the cut line K34. Specifically, a ruled line is formed on the inner surface of the left side surface portion 230 along the broken line C31. The ruled line is formed from the upper end corner of the left side 230 to the middle of the cut line K34. However, an interval may be provided between the lower end of the broken line C31 and the cut line K34. You may provide a space | interval between an upper end and the corner | angular part of the back side upper end of the left side surface part 230. FIG.

  That is, one end of the ruled line is located at the upper corner of the back side of the left side surface part 230, and the other end of the ruled line is located in the middle of the cut line K34, but the ruled line is located on the left side part 230. The corners on the upper side of the back surface and the cut line K34 may not be formed midway, and the end of the ruled line may be formed up to a midway position toward the corner (that is, the corner of the ruled line). (A space is formed between the end portion on the portion side and the corner portion), and the end portion of the ruled line may be formed to a midway position toward the midway position of the cut line K34 (that is, A space is formed between an end portion on the middle position side of the cut line K34 of the ruled line and a middle position of the cut line K34). That is, a ruled line (which may be a broken line C31) is located at a position between the upper corner (fourth corner) on the back side of the left side 230 and the middle position (fourth middle position) of the cut line K34. What is necessary is just to be linearly formed in the direction which connects the intermediate | middle position of the back upper corner | angular part and the cut line K34.

  Further, the broken line C48 is formed in a straight line on the upper side of the adhesive margin part 249 and is inclined with respect to the broken line C49 from the corner on the back surface part 240 side. In the state in which the paper box Q is assembled, the fold line C48 is provided along the fold line C21. On the inner surface of the margin portion 249, a ruled line for bending is formed along the broken line C48. Note that the ruled line along the broken line C48 does not have to be formed up to the corner on the back surface 240 side above the adhesive margin 249, and a space may be formed between the ruled line and the corner.

  A portion below the cut line K10 in the front portion 210 becomes the lower front portion 212, and a portion above the cut line K10 in the front portion 210 becomes the upper front portion 215. The lower front portion 212 is formed in a substantially U shape, and the portions other than the left and right sides are formed low.

  In addition, a portion below the cut line K20 in the right side surface 220 becomes the lower right side surface portion 222, and a portion above the cut line K20 in the right side surface 220 becomes the upper right side surface portion 225. Further, in the upper right side surface portion 225, the area on the front side of the broken line C21 is a front side area (first front side area) 226, and the area on the back side of the broken line C21 is the back side area (first back side area) 227. It becomes. That is, the upper right side surface portion 225 is partitioned into a front side region 226 and a back side region 227 via a broken line C21.

  In addition, a portion below the cut line K30 in the left side surface portion 230 becomes the lower left side surface portion 232, and a portion above the cut line K30 in the left side surface portion 230 becomes the upper left side surface portion 235. Further, in the upper left side surface portion 235, the area on the front side with respect to the broken line C31 is the front side area (second front side area) 236, and the area on the back side with respect to the broken line C31 is the back side area (second back side area) 237. It becomes. That is, the upper left side surface portion 235 is partitioned into a front side region 236 and a back side region 237 via a polygonal line C31.

  In addition, the lower portion of the back surface 240 below the cut line K40 is the lower back surface portion 242 and the upper portion of the back surface 240 above the cut line K40 is the upper back surface portion 245. Further, in the lower back surface portion 242, a region surrounded by the cut lines K41, K44, K45 and the broken line C41 becomes the push portion 244, and a region other than the push portion 244 in the lower back surface portion 242 becomes the lower back surface body 243. In the upper back surface portion 245, a region sandwiched between the polygonal line C42 and the polygonal line C43 is a central region 246, a region on the right side of the polygonal line C42 is a right region 247, and a region on the left side of the polygonal line C43 is on the left side. Region 248 is formed. That is, the upper back surface part 245 is divided into the center area | region 246, the right side area | region 247, and the left side area | region 248 via the broken line C42 and the broken line C43.

  In addition, a space is provided between the lower end of the ruled line as the broken line C42 and the cut line 40, and a space is provided between the upper end of the ruled line as the broken line C42 and the upper right corner of the back surface 240. In the case where a space is provided between the lower end of the ruled line as the broken line C43 and the cut line 40, and a space is provided between the upper end of the ruled line as the broken line C43 and the upper left corner of the back surface 240. Strictly speaking, the central region 246 can be said to be “a region between the polygonal line C42 or the polygonal line C42 and its extension and the polygonal line C43 or the polygonal line C43 and its extension”, but in this case, the central region 46 is also a polygonal line. It can be said that the region is between C42 and the broken line C43.

  The part below the cut line K49 in the glue margin part 249 becomes the glue margin lower part 249-1, and the part above the break line K49 in the glue margin part 249 becomes the glue margin upper part 249-2.

  Moreover, the cover part 310 is continuously provided through the broken line from the upper side of the front part 210, and is exhibiting the shape which chamfered the corner | angular part of the both sides of the front end of a square shape (rectangular shape). Moreover, the cover part 340 is connected continuously from the upper side of the back part 240 via a broken line, exhibits a shape in which corners on both sides of a rectangular (rectangular) tip are chamfered, and the assembled state of the paper box Q (see FIG. 18 to 21), it is formed symmetrically with respect to the left and right planes via a center plane (center plane in the left and right direction) facing in the front-rear direction.

  The length from the base end to the front end of the lid portions 310 and 340 is half of the length in the front-rear direction of the right side portion 220 and the left side portion 230 (for example, the length between the broken line C30 and the broken line C40).

  Moreover, the flap part 320 is continuously provided via the broken line from the upper side of the right side part 220, and is exhibiting square shape (rectangular shape). Moreover, the flap part 320 is connected from the upper side of the right side part 220 via a broken line, and has a rectangular shape (rectangular shape). The length from the base end to the front end of the flap portions 320 and 330 is shorter than half of the length in the left-right direction of the front portion 210 and the back portion 240 (for example, the length between the broken line C20 and the broken line C30). Yes.

  The bottom surface 400 has a first piece 410, a second piece 420, a third piece 430, and a fourth piece 440. It has an external shape. The bottom surface portion 400 has a configuration called American rock (or hell bottom).

  Here, the 1st piece part 410 is provided in a row from the lower side of the front part 210 via a broken line, and has a rectangular shape with protrusions at the left and right ends of the rectangular shape. In addition, the second piece 420 is connected from the lower side of the right side 220 through a broken line, and has a tapered trapezoidal tip with a hypotenuse on the first piece 410 side. And the third piece 430 is formed from the lower side of the left side surface part 230 via a broken line. Consecutively, the first piece 410 has a hypotenuse on the side of the first trapezoidal shape, and has a tapered shape at the tip of the taper (the projecting part has a rectangular shape with a radius on the side of the hypotenuse. The length to the tip is shorter than the length from the base end to the tip of the protruding portion in the second piece 420. The fourth piece 440 is connected from the lower side of the back surface part 240 via a broken line and protrudes from the tip of the tapered trapezoidal shape having oblique sides on both the left and right sides. It is the structure which provided the shape part (The round is formed in the front-end | tip of the both sides of a protrusion part).

  The lid portions 310 and 340 and the flap portions 320 and 330 open and close the upper surface of the paper box Q, and in particular, the upper surface of the paper box Q is closed by closing the lid portions 310 and 340. It is. The lid portions 310 and 340 and the flap portions 320 and 330 are erected in advance upward, and the upper portion of the paper box Q is open. In addition, although the cover parts 310 and 340 are provided continuously from the upper side of the front part 210 and the upper side of the rear part 240, it is sufficient that the cover parts 310 and 340 are provided continuously from at least one upper side in each part constituting the sleeve-like part 205.

  A method of using the paper box Q having the above configuration will be described. Since the paper box Q is configured as described above, the bottom surface portion 400 is not assembled, the angle between the front surface portion 210 and the right side surface portion 220 is reduced, and the angle between the back surface portion 240 and the left side surface portion 230. The paper box Q is folded by making the front portion 210 and the left side surface portion 230 into a single flat plate shape and the back portion 240 and the right side surface portion 220 into a single flat plate shape as a whole. The paper box Q can be stored and transported with the paper box Q folded.

  When the paper box Q is assembled, the state shown in FIGS. 18 to 21 is obtained, and the bottom surface portion 400 has a substantially flat plate shape, and each member constituting the sleeve-like portion 205 (the front surface portion 210, the right side surface portion 220, the left side). Adjacent members in the face part 230 and the back part 240) are perpendicular to each other. Further, the front part 210 and the back part 240 are parallel to each other, and the right side part 220 and the left side part 230 are parallel to each other. In a state where the bottom surface portion 400 is assembled, the fourth piece portion 440 is overlapped with the second piece portion 420 and the third piece in a state where the second piece portion 420 and the third piece portion 430 are stacked on the lower side of the first piece portion 410. The protruding part of the fourth piece part 440 is inserted above the first piece part 410 so as to overlap the lower part of the part 430.

  Then, an article (product) G is stored from above the paper box Q. The lid portions 310 and 340 and the flap portions 320 and 330 are erected upward in advance with respect to the sleeve-like portion 205, and the upper side of the paper box Q is open. The stored item G may be stored as it is from above the paper box Q. Thereafter, the flap portions 320 and 330 are bent inward and the lid portions 310 and 340 are bent inward to close the lid portions 310 and 340, and the adhesive tape S is left-handed from the right-side surface portion 220 through the upper surface. By adhering to 230, the state shown in FIG. 25 is obtained. That is, in the state shown in FIG. 25, the lid portions 310 and 340 are fixed in a closed state.

  As described above, when the objects to be stored are packaged in the paper box Q with the lids 310 and 340 closed, the paper box Q storing the objects to be stored G is transported to a place where the objects to be stored G are displayed. To do.

  In order to make the paper box Q in the display place in a state where the articles are displayed, the upper component A-2 of the paper box Q is removed as described below. That is, the pushing part 244 in the back surface part 240 is pushed, and the pushing part 244 is rotated inward via the broken line C41. That is, by pushing the pushing portion 244 inward, the cut line K41 is broken, and the pushing portion 244 is rotated via the broken line C41. Then, a space for inserting a finger is formed below the central region 246, so that the finger of one hand is inserted below the central region 246 and the finger is hooked on the lower end of the central region 246.

  Thereafter, by pulling the lower end of the central region 246 outward, the right region 247 and the left region 248 are gradually pulled from the central region 246 side, and the cut lines K42 and K43 are broken. In a state where the lower end of the central region 246 is pulled outward, the fold lines C42 and C43 are mountain-folded when viewed from the outside. In other words, the right region 247 bends inward with respect to the central region 246 via the broken line C42, and the left region 248 bends inward with respect to the central region 246 via the broken line C43. In particular, since the broken lines C42 and C43 are provided, the sides along the cut line K42 of the right region 247 and the sides along the cut line K43 of the left region 248 are easily inclined in the front-rear direction. Can be easily broken.

  Thereafter, by further pulling the lower end of the central region 246 outward, the cut line K24-1 in the portion between the lower right side surface portion 222 and the back side region 227 in the cut line K24 is broken from the back side, and in the cut line K34 The cut line K34-1 between the lower left side surface portion 232 and the back side region 237 is broken from the back side (see FIG. 26).

  That is, by pulling the lower end of the central region 246 outward, the back side region 227 rotates inward via the broken line C21, and the lower right side surface portion 222 and the back side region 227 try to be separated laterally, As the back side region 237 rotates inward via the broken line C31, the lower left side surface part 232 and the back side region 237 are about to be separated laterally, and the cut lines K24-1 and K34-1 are broken. At that time, the back side region 227 is rotated inward via the broken line C21 (that is, the back side region 227 is bent inward via the broken line C21 with respect to the front side region 226), and the back side region 237 is Since it rotates inward via the polygonal line C31 (that is, the back side region 237 bends inward via the polygonal line C21 with respect to the front side region 236), the polygonal line C21 and the polygonal line C31 are mountain-folded when viewed from the outside. It becomes the state of. In particular, since the broken lines C21 and C31 are provided, the back side regions 227 and 237 can be easily rotated via the broken lines C21 and C31, and the cut lines K24-1 and K34-1 can be easily broken.

  Note that the cut lines K42 and K43 and the cut lines K24-1 and K34-1 are broken by pulling the lower end of the central region 246 outward. In practice, therefore, the lower end of the central region 246 is pulled outward. By the operation, the break lines K42 and K43 to the break lines K24-1 and K34-1 (up to the front side ends of the break lines K24-1 and K34-1) can be broken. That is, by pressing the pressing portion 44 that is a region between the pair of cut lines K44 and K46 in the lower back surface portion 242 from the outside, hooking a finger on the lower end of the central region 246 and pulling the lower end of the central region 246 outward, the right side The cut line K42 between the region 247 and the lower back surface part 242 and the cut line K43 between the left side region 248 and the lower back surface part 242 are broken, and the back side region 227 which is the back side region of the upper right side surface part 225 from the broken line C21. Is turned inward via the broken line C21 to break the broken line K24-1 (broken line between the back side region 227 and the lower right side surface part 222 in the broken line K24) and more than the broken line C31 in the upper left side surface part 235. The back side region 237, which is the back side region, is rotated inward via the broken line C31 to form the cut line K34-1 (to the cut line K34). That score line between the rear-side region 237 and the lower left side surface 232) is broken. As the order of breaking, the cut lines K42 and K43 are broken from the inside by pulling the lower end of the central region 246 outward, and then the cut lines K24-1 and K34-1 are broken from the back side.

  When the cut lines K24-1 and K34-1 are broken, the lower right side 222 and the rear side region are formed by further pulling the lower end of the central region 246 outward and pulling the central region 246 upward. 227 tends to be separated in the vertical direction, and the lower left side surface portion 232 and the rear side region 237 are to be separated in the vertical direction, so that the cut lines K24-1 and K34-1 are broken. That is, since not only the horizontal separation operation but also the vertical separation operation can be obtained, the cut lines K24-1 and K34-1 can be easily broken.

  After that, as shown in FIG. 27, by pulling up the hand having the central region 246, the cut lines K24 and K34 are broken toward the front side. That is, a cut line K24-2 between the lower right side surface portion 222 and the front side region 226 in the cut line K24, and a cut line K34-2 between the lower left side surface portion 232 and the front side region 236 in the cut line K34. It breaks to the end position on the front side. In that case, it is preferable to make it the state which pressed the location of the back side of lower structure part A-1 with the other hand. That is, when pressing with the left hand, the upper ends of the corners of the lower back surface portion 242 and the lower right side surface portion 222 are pressed, and when pressing with the right hand (in this case, the central region 246 is pulled up with the left hand), the lower back surface portion 242 And hold the upper end of the corner of the lower left side 232.

  The cut line K24 includes a cut line K24-1 and a cut line K24-2, and the cut line K34 includes a cut line K34-1 and a cut line K34-2.

  When the cut lines K24, K34 are broken to the front side, the cut lines K24, K34 are inclined with respect to the horizontal direction so that the cut lines K24, K34 become upward as they go to the front side. K34 can be easily broken. That is, since the cut lines K24 and K34 are formed upward toward the front side, the cut lines K24 and K34 can be broken by the operation of lifting the back end of the upper component A-2, and the upper component A -2 lifting the end on the back side makes it easy to apply force, and the direction of the force applied to the breaking point is the breaking direction (the direction along the breaking line is the direction of breaking along the breaking line). Since the angle between the direction of the force applied to the broken portion and the breaking direction is an acute angle, the cut line can be more easily broken. That is, assuming that the direction of the force F applied to the broken portion is the vertical direction (perpendicular to the horizontal direction) (the central region 46 is pulled upward, the direction of the force F applied to the broken portion is vertical (perpendicular to the horizontal direction). The angle α formed between the direction of the force F applied to the fracture location and the fracture direction is an acute angle, and as shown in FIG. 30, the force F applied to the fracture location includes the component F1 perpendicular to the fracture direction and the fracture Since it is divided into the component F2 in the direction and not only the component F1 but also the component F2, the breakage is facilitated. Compared with this case, when the direction of the cut line is the horizontal direction, as shown in FIG. 30B, the angle α formed by the direction of the force F applied to the broken portion and the breaking direction is a right angle, and the breaking direction. Since there is no force component in the direction of breakage, there is no force component perpendicular to the direction of breakage, making breakage difficult compared to the case of FIG. Further, when the direction of the cut line is descending toward the breaking direction, the angle α formed by the direction of the force F applied to the broken portion and the breaking direction is an obtuse angle as shown in FIG. Since the force F applied to the location is divided into a component F1 perpendicular to the breaking direction and a component F2 opposite to the breaking direction, the breaking is further difficult compared to the case of FIG. In FIG. 30, the cut line is schematically shown by a straight line.

  Note that the arrangement direction of the plurality of cuts in the cut line K42 is inclined obliquely upward so as to be on the upper side from the cut line K41 side to the right side end portion (cut line K24 side) of the back surface portion 240. In addition, the arrangement direction of the plurality of cuts in the cut line K43 is inclined obliquely upward so as to become upward as it goes from the cut line K41 side to the left side end portion of the back surface part 240, so the cut line K24. It can be said that it is easy to break for the same reason as in the case of K34. That is, by pulling the lower end of the central region 246 outward, the central region 246 rotates about the upper side of the back surface portion 240, so the lower end of the central region 246 is pulled upward in the vertical direction, and the lower end of the central region 246 Is pulled upward, the lower ends of the right region 247 and the left region 248 are also pulled upward. However, the direction of the force applied to the breakage point is the break direction (along the break line) than the direction perpendicular to the break line break direction. Since the angle between the direction of the force applied to the broken portion and the breaking direction is an acute angle, the break line can be more easily broken.

  After breaking up to the front end position of the cut lines K24, K34, the upper component A-2 moves the front end side position of the cut lines K22, K32 by pulling the central region 246 diagonally upward. Since the cut lines K22 and K32 are broken while turning to the center, the cut lines K14 and K15 are broken by pulling the upper component A-2 further to the front side (or the lower front side), and then The cut lines K12 and K13 are broken, the cut line K11 is finally broken, and the upper component A-2 is separated from the lower component A-1.

  The state in which the upper component A-2 is removed is as shown in FIGS. 28 and 29, and the object G is stored in the lower component A-1, so that in this state, Display object G.

  In addition, since the lower front part 212 is formed in a substantially U shape, and the part except left and right both sides is formed low, it becomes easy to visually recognize the to-be-contained object G from the front side. Moreover, since the upper side of the lower component part A-1 is open, when the storage object G is taken out, the storage object G may be pulled out and taken out.

  In the paper box Q, the upper component A-2 is removed, and the belt-like zipper is not removed. Therefore, the belt-like zipper is not generated as waste, and only the upper component A-2 is discarded. do it. In other words, in the case of a configuration in which two parallel cut lines are formed in a circumferential shape and a belt-like zipper is provided, two wastes are generated: the upper portion of the zipper and the zipper itself. In some cases, the waste may be only the upper component A-2.

  In the paper box Q, the cut line B1 shown in FIG. 16 and the cut line B2 shown in FIG. 17 are provided (particularly provided when the cut line opening direction is linear). (That is, the same effect as in the first embodiment) can be obtained.

  In addition, in the range of the cut line K43 and the cut line K34-1 in the cut line of the range 10G2, as in the case of the above-described Example 1, one area via the cut line is a blank surface with respect to the other area. However, in the first embodiment, the Y1 side (see FIG. 16) of the cut 10 (that is, the belt-like portion 40 side) is pulled, whereas in the present embodiment, the Y2 side of the cut 10 is pulled. (Refer to FIG. 16), compared to the case of the first embodiment, it can be said that the component from the rear end of the notch 10 is obliquely upward (that is, the direction of H1 or H2) is relatively large. Since K34-1 is oriented obliquely upward along the cut line opening direction, it is easy to receive the breaking force at the end m11, and the breaking force can be received by the straight part 12 or the curved part 14, so peeling It is possible to prevent.

  Further, in the cut line K34 other than the cut line K34-1 and the cut lines K32 and K15, one region through the cut line is separated in a direction substantially parallel to the blank surface with respect to the other region. Although the breaking force from the notch 10 tends to go diagonally downward (that is, in the direction of H4), the use of a thin blank can reduce the diagonally downward component, thereby preventing the peeling of the blank.

  Further, in the range of the cut line K42 and the cut line K24-1 in the cut line of the range 20G3, as in the case of the first embodiment, one area through the cut line is a blank surface with respect to the other area. However, in this embodiment, since the Y2 side (see FIG. 16) of the cut 20 is pulled, compared to the case of the first embodiment, it is obliquely above the rear end of the cut 20 (that is, H1 or It can be said that the component to H2 direction) is relatively large, but the break lines K42 and K24-1 are obliquely upward along the cut line opening direction, so that it is easy to receive the breaking force at the end m21, Since the breaking force can be received by the straight portion 22 and the curved portion 24, peeling can be prevented.

  Further, in the portion other than the cut line K24-1 in the cut line K24 and the cut lines K22 and K14, one region through the cut line is separated in a direction substantially parallel to the blank surface with respect to the other region. Although the breaking force from the notch 20 tends to go diagonally downward (that is, in the direction of H4), the use of a thin blank can reduce the diagonally downward component, so that peeling of the blank can be prevented.

  In the paper box Q described above, the incisions 10 and 20 are arranged so that the vertices of the curved portions 14 and 24 are on the upper side, but the vertices of the curved portions 14 and 24 are on the lower side. You may arrange.

  In that case, in the range of the cut line K43 and the cut line K34-1 in the cut line of the range 10G2, the Y2 side (see FIG. 16) of the cut 10 is pulled, so the case of the zipper A of Example 1 The same actions and effects can be obtained.

  Further, in the cut line K34 other than the cut line K34-1 and the cut lines K32 and K15, one region through the cut line is separated in a direction substantially parallel to the blank surface with respect to the other region. The breaking force from the notch 10 tends to go diagonally downward (that is, in the directions of H1 and H2), but the breaking force can be received by the straight line portion 12 and the curved portion 14, so that the peeling of the blank can be prevented. .

  Further, in the range of the cut line K42 and the cut line K24-1 in the cut line of the range 20G3, the Y1 side (see FIG. 16) of the cut 20 is pulled, so that it is the same as the case of the zipper A of the first embodiment. Action and effect are obtained.

  Further, in the portion other than the cut line K24-1 in the cut line K24 and the cut lines K22 and K14, one region through the cut line is separated in a direction substantially parallel to the blank surface with respect to the other region. The breaking force from the notch 20 tends to go diagonally downward (that is, in the directions of H1 and H2), but since the breaking force can be received by the straight portion 22 or the curved portion 24, peeling of the blank can be prevented. .

  The zipper C as a paper box zipper (paper box cutting structure, carton cutting structure) according to the present invention has substantially the same configuration as the zipper A of the first embodiment. The difference is that a straight line portion is provided between two curved portions.

  That is, the zipper C is configured as shown in FIGS. 31 to 35, and has cut lines C <b> 1 and C <b> 2 arranged in parallel with each other and a cut A <b> 3 for forming the piece 30 at the opening start position. . That is, the cut line C1 and the cut line C2 are formed in two rows in parallel to each other. The zipper C is formed on a sheet-like blank (for example, cardboard or cardboard) constituting a paper box.

  Here, the cut line C1 is a line in which a plurality of cuts 10 are arranged in a line with a space therebetween, and each cut 10 includes a straight part 12 and a straight part as shown in FIGS. 12, the curved portion 14 provided continuously from the end portion, the straight portion 15 provided continuously from the opposite end portion of the curved portion 14 to the straight portion 12, and the curved portion 14 opposite to the curved portion 14 of the linear portion 15. It has the curved part 16 provided continuously from the end part, and the extending | stretching part 18 provided continuously from the edge part on the opposite side to the curved part 14 of the curved part 16. As shown in FIG. The straight portion 12, the curved portion 14, the straight portion 15, the curved portion 16, and the extending portion 18 are all formed by a cut that penetrates from the front surface to the back surface of the blank.

  Here, the straight line portion 12 (which may be the first straight line portion and the first inclined portion. The same applies to other portions) 12 is a virtual straight line 10E in the zipper opening direction (also referred to as the “zipper breaking direction”) (X1-X2 direction). The angle between the straight line portion 12 and the virtual straight line 10E (the angle on the curved line portion 14 side) is α11, and the angle α11 is an acute angle, specifically, less than 45 degrees. It is an angle (specifically, 37 to 41 degrees). The straight portion 12 is formed in a straight line shape. The virtual straight line 10 </ b> E is a straight line formed in the opening direction of the zipper C and passing through the end m <b> 11 that is the front end of the straight part 12 and the end m <b> 15 that is the rear end of the extending part 18. In addition, FIGS. 31-35 has shown the case where the zipper opening direction is linear, and the zipper formation direction is linear.

  As shown in FIG. 33, an end portion (first end portion) m11 opposite to the curved portion 14 side of the straight portion 12 is from a contact point (first contact point) m12 with the curved portion 14 of the straight portion 12. Is also on the front side (X1 side) in the opening direction. That is, the straight line portion 12 is inclined with respect to the direction of the virtual straight line 10E (may be a virtual straight line 10E) so that the end portion m11 is located in front of the contact point m12 in the zipper opening direction.

  Further, the end m11 is located on an extension line to the front side of the extending portion 18. That is, the end portion m11, the adhesion point m14 and the end portion m15 located at both ends of the extending portion 18 are located on the same straight line.

  Further, the curved portion (which may be a first curved portion or a first arc-shaped portion. The same applies to other portions) 14 is formed in an arc shape from the end portion of the linear portion 12 as shown in FIG. Between the point m12 and the contact point (second contact point) m13-1), specifically, the zipper opening direction side (specifically, the right side (may be the right direction)) It is formed in an arc shape that is curved (that is, bent). That is, the curved portion 14 is formed in a bending direction that bends toward the zipper opening direction in the bending direction with respect to the direction of the straight portion 12. The tangent line of the curved portion 14 at the contact point m12 between the curved portion 14 and the linear portion 12 is overlapped with the linear portion 12, whereby the straight line of the linear portion 12 is located at the boundary between the linear portion 12 and the curved portion 14. The direction is smoothly switched from the direction to the arcuate direction of the curved portion 14. Moreover, the contact point m12 with the linear part 12 of the curved part 14 is on the front side (X1 side) in the zipper opening direction with respect to the contact point m13-1 with the linear part 15 of the curved part 14.

  Further, the straight portion (which may be a second straight portion or a second inclined portion. The same applies in other cases) 15 is formed linearly from the rear end of the curved portion 14, and is formed inclined with respect to the virtual straight line 10E. The rear end of the straight line portion 15 is inclined so as to be closer to the virtual straight line 10E than the front end. That is, the straight line portion 15 is in contact with the curved portion 14 at the contact point (second contact point) m13-1, and is in contact with the curved portion 16 at the contact point (third contact point) m13-2 (that is, the straight portion 15). Is formed linearly between the contact point m13-1 and the contact point m13-2), and the contact point m13-1 is on the front side (X1 side) of the contact point m13-2 in the zipper opening direction. The length from the contact point m13-2 to the virtual straight line 10E is shorter than the length from the contact point m13-1 to the virtual straight line 10E. An angle α13 formed by an extension line of the straight line portion 15 to the virtual straight line 10E and the virtual straight line 10E is the same as the angle α11 and is an angle smaller than 45 degrees (specifically, 37 to 41 degrees). Yes.

  Note that the tangent line of the curved portion 14 at the contact point m13-1 overlaps with the straight line portion 15, whereby the straight line of the straight line portion 15 extends from the curve direction of the curved portion 14 at the boundary between the curved portion 14 and the straight line portion 15. The direction is smoothly switched.

  Further, the curved portion (the second curved portion or the second arc-shaped portion may be the same. The same applies to other portions) 16 is formed in an arc shape from the end of the straight portion 15 as shown in FIG. (It is formed in an arc shape between the point m13-2 and the contact point m14), specifically, curved in the direction opposite to the direction of the curve of the curved portion 14 (that is, curved to the left (or leftward). It is formed in an arc shape. In other words, the curved portion 16 is formed in a bending direction opposite to the bending direction of the curved portion 14, and is formed in an arc shape between the contact point m13-2 and the contact point (fourth contact point) m14. The contact point m13-2 is in front of the contact point m14 in the zipper opening direction. The diameter (radius) of the arc that forms the curved portion 16 is larger than the diameter (radius) of the arc that forms the curved portion 14.

  In addition, the tangent of the curved portion 16 at the contact point m13-2 overlaps with the straight portion 15, so that the curve of the curved portion 16 from the straight direction of the straight portion 15 at the boundary between the straight portion 15 and the curved portion 16 can be obtained. The direction is smoothly switched.

  Further, the contact point m14 is located on the virtual straight line 10E, the tangent line of the curved portion 16 at the contact point m14 is in the direction of the virtual straight line 10E, and the extending portion 18 is also formed in the direction of the virtual straight line 10E. At the boundary between the curved portion 16 and the extending portion 18, the direction is smoothly switched from the direction of the curved portion 16 to the extending portion 18.

  Further, the extending portion (which may be a straight portion) 18 is formed linearly from the end portion of the curved portion 16, and is formed linearly between the contact point m14 and the end portion (second end portion) m15.

  In the notch 10, the angle formed between the extended line 12E of the straight line portion 12 and the extended line 16E of the straight line portion 15 (the angle on the curved line 14 side formed by the extended line 12E and the extended line 16E) α12 is formed to be greater than 90 degrees. For example, it is formed at 100 to 105 degrees. The angle α13 formed by the extension line 16E and the virtual straight line 10E is the same as the angle α11.

  Moreover, the length of the extending portion 18 is 30% to 50% of the length L10 along the virtual straight line 10E from the end m11 to the end m15.

  Further, in the range from the end m11 to the contact point m14, the length (length L12 and length) along the virtual straight line 10E (that is, the zipper opening direction) of the curved portion (that is, the curved portion 14 and the curved portion 16). L13) is longer than the length (the sum of the length L11 and the length L15) along the virtual straight line 10E (that is, the zipper opening direction) of the straight portion (that is, the straight portion 12 and the straight portion 15), Specifically, the length of the curved portion along the virtual straight line 10E is twice or more than the length of the straight portion along the virtual straight line 10E.

  As an example of a method of actually creating a graphic showing the cut 10, specifically, as shown in FIG. 34. That is, when the length from the end m11 to the end m15 (the length along the virtual straight line 10E) is 5 × N (N is a unit length), the isosceles whose left end is the position of the end m11 Draw a triangle. This isosceles triangle has a base of 2 × N length and a height of 0.8 × N, and is composed of hypotenuses 60 and 62 and a base 64. Here, the straight line portion 12 is formed on the hypotenuse 60.

  An arc 66 having a radius of 2 × N is drawn at an obtuse angle α42 formed by the hypotenuse 62 and the virtual straight line 10E. The arc 66 is in contact with the virtual straight line 10E at the position W11, and is in contact with the hypotenuse 62 at the position W12. The curved portion 16 is formed on this arc 66, the position W11 is a position corresponding to the contact point m14, and the position W12 is a position corresponding to the contact point m13-2.

  Then, an arc 68 that touches the hypotenuse 60 and the hypotenuse 62 and has a radius of 0.6 N is drawn. Then, the arc 68 contacts the hypotenuse 60 at the position W13 and contacts the arc 66 at the position W14. The arc 68 corresponds to the curved portion 14, the position W13 corresponds to the contact point m12, and the position W14 corresponds to the contact point m13-1.

  Then, a straight line 69 connecting the position W14 and the position W12 is drawn. The straight line 69 is provided on the oblique side 62. This straight line 69 hits the straight line portion 15. Furthermore, the extending | stretching part 18 is formed by drawing linearly from the position W11 to the position corresponding to the edge part m15 along the virtual straight line 10E. As described above, a graphic showing the cut 10 is created. In the adjacent cuts 10, the length between the rear end of the front cut 10 (the rear end of the extending portion 18) and the front end of the rear cut 10 (the front end of the straight portion 12) in the opening direction is N and To do.

  The opening direction of the zipper C can be said to be a direction connecting the same portions in the plurality of cuts 10 as in the case of the first embodiment, and the opening direction of the zipper C can be a direction connecting the same portions in the plurality of cuts 20. Good.

  Note that, in one cut line C1, the cuts 10 have the same configuration, and the interval between the adjacent cuts 10 is basically the same, and is adjacent when at least the zipper C is formed in a straight line. The intervals between the cuts 10 are formed the same.

  Next, as shown in FIG. 32, the cut line C2 is formed symmetrically (line symmetric) via the center line Ah between the cut line C1 and the cut line C2 in the opening direction, and is spaced from the cut line C1. Is formed. The center line Ah is a straight line having the same distance from the cut line C1 and the cut line C2, and has a point (for example, an end portion m11) having a cut 10 and a point corresponding to the certain point of the cut 20 (the end portion m11 is provided). In the case of points, it can be said that the distances from the end m21)) are equal straight lines.

  The cut line C2 is formed by arranging a plurality of cuts 20 in a line at intervals, and each cut 20 includes a straight part 22 and ends of the straight part 22 as shown in FIGS. 31, 32, and 35. From the end of the curved portion 24, the straight portion 25 connected from the end of the curved portion 24 opposite to the straight portion 22, and the end of the straight portion 25 opposite to the curved portion 24. It has the curved part 26 provided continuously, and the extending | stretching part 28 provided continuously from the edge part on the opposite side to the curved part 24 of the curved part 26. FIG. The straight portion 22, the curved portion 24, the straight portion 25, the curved portion 26, and the extending portion 28 are all formed by a cut that penetrates from the front surface to the back surface of the blank. Each cut 20 is formed symmetrically with respect to the corresponding cut 10 in the cut line C1 and the center line Ah. A center line Ah in FIG. 2 is a straight line parallel to the virtual straight lines 10E and 20E. In addition, in the plurality of cuts 10 and the plurality of cuts 20, the corresponding cuts 10 and the cuts 20 become longer as the length between the straight line part 12 of the cuts 10 and the straight line part 22 of the cuts 20 goes rearward in the zipper opening direction. Are symmetrical with each other. That is, in the notch 10 and the notch 20 corresponding to each other, the notch 10 and the notch 20 face each other in a state where the contact point m12 is outside the end portion m11 and the contact point m22 is outside the end portion m21. The line is symmetrical with respect to the center line Ah.

  Here, the straight portion (which may be the first straight portion and the first inclined portion, and the same applies to other portions) 22 is a virtual straight line 20E in the zipper opening direction (also referred to as the “zipper breaking direction”) (X1-X2 direction). The angle between the straight line portion 22 and the virtual straight line 20E (the angle on the curved line portion 14 side) is α21, and the angle α21 is an acute angle, specifically, less than 45 degrees. It is an angle (specifically, 37 to 41 degrees). The straight portion 22 is formed in a straight line shape. The virtual straight line 20 </ b> E is a straight line formed in the opening direction of the zipper C and passing through the end m <b> 21 that is the front end of the straight part 22 and the end m <b> 25 that is the rear end of the extending part 28.

  As shown in FIG. 35, the end portion (first end portion) m21 opposite to the curved portion 24 side of the straight portion 22 is from a contact point (first contact point) m22 with the curved portion 24 of the straight portion 22. Is also on the front side (X1 side) in the opening direction. That is, the straight line portion 22 is inclined with respect to the direction of the virtual straight line 20E (or may be a virtual straight line 20E) so that the end m21 is located in front of the contact point m22 in the zipper opening direction.

  Further, the end m21 is located on an extension line to the front side of the extending portion 28. That is, the end portion m21 and the adhesion point m24 and the end portion m25 located at both ends of the extending portion 28 are located on the same straight line.

  Further, the curved portion (the first curved portion and the first arc-shaped portion may be the same. The same applies to other portions) 24 is formed in an arc shape from the end portion of the linear portion 22 as shown in FIG. Between the point m22 and the contact point (second contact point) m23-1), specifically, the side in the zipper opening direction (specifically, the left side (may be left)) It is formed in an arc shape that is curved (that is, bent). That is, the curved portion 24 is formed in a bending direction that is bent toward the zipper opening direction in the bending direction with respect to the direction of the straight portion 22. The tangent line of the curved portion 24 at the contact point m22 between the curved portion 24 and the straight portion 22 is overlapped with the straight portion 22, so that the straight line of the straight portion 22 is located at the boundary between the straight portion 22 and the curved portion 24. The direction is smoothly switched from the direction to the arcuate direction of the curved portion 24. Moreover, the contact point m22 with the linear part 22 of the curved part 24 is on the front side (X1 side) in the zipper opening direction with respect to the contact point m23-1 with the linear part 25 of the curved part 24.

  Moreover, the straight part (a 2nd straight part and a 2nd inclination part. It is good also in others) 25 is formed in linear form from the rear end of the curved part 24, and is formed inclining with respect to the virtual straight line 20E. The rear end of the straight line portion 25 is inclined so as to be closer to the virtual straight line 20E than the front end. That is, the straight line portion 25 is in contact with the curved portion 24 at a contact point (second contact point) m23-1, and is in contact with the curved portion 26 at a contact point (third contact point) m23-2 (that is, the straight portion 25). Is formed linearly between the contact point m23-1 and the contact point m23-2), and the contact point m23-1 is on the front side (X1 side) of the contact point m23-2 in the zipper opening direction. The length from the contact point m23-2 to the virtual straight line 20E is shorter than the length from the contact point m23-1 to the virtual straight line 20E. An angle α23 formed by an extension line of the straight line portion 25 to the virtual straight line 20E and the virtual straight line 20E is the same as the angle α21, and is an angle smaller than 45 degrees (specifically, 37 to 41 degrees). Yes.

  Note that the tangent line of the curved portion 24 at the contact point m23-1 overlaps with the straight line portion 25, whereby the straight line of the straight line portion 25 extends from the curve direction of the curved portion 24 at the boundary between the curved portion 24 and the straight line portion 25. The direction is smoothly switched.

  Further, the curved portion (the second curved portion or the second arc-shaped portion may be the same. The same applies to other portions) 26 is formed in an arc shape from the end of the linear portion 25 as shown in FIG. (It is formed in an arc shape between the point m23-2 and the contact point m24), specifically, curved in the direction opposite to the curve direction of the curved portion 24 (that is, curved to the right side (or right direction). It is formed in an arc shape. That is, the curved portion 26 is formed in a bending direction opposite to the bending direction of the curved portion 24, and is formed in an arc shape between the contact point m23-2 and the contact point (fourth contact point) m24. The contact point m23-2 is in front of the contact point m24 in the zipper opening direction. The diameter (radius) of the arc that forms the curved portion 26 is larger than the diameter (radius) of the arc that forms the curved portion 24.

  In addition, the tangent of the curved portion 26 at the contact point m23-2 overlaps with the straight portion 25, so that the curve of the curved portion 26 from the straight direction of the straight portion 25 at the boundary between the straight portion 25 and the curved portion 26 can be obtained. The direction is smoothly switched.

  Further, the contact point m24 is located on the virtual straight line 20E, the tangent line of the curved portion 26 at the contact point m24 is in the direction of the virtual straight line 10E, and the extending portion 28 is also formed in the direction of the virtual straight line 20E. The boundary between the curved portion 26 and the extending portion 28 is smoothly switched from the direction of the curved portion 26 to the extending portion 28.

  The extending portion (which may be a straight portion) 28 is formed linearly from the end portion of the curved portion 26 and is formed linearly between the contact point m24 and the end portion (second end portion) m25.

  In the incision 20, the angle α22 formed by the extension line 22E of the straight portion 22 and the extension line 26E of the straight portion 25 (the angle on the curved portion 24 side formed by the extension line 22E and the extension line 26E) α22 is formed to be greater than 90 degrees. For example, it is formed at 100 to 105 degrees. The angle α23 formed by the extension line 26E and the virtual straight line 20E is the same as the angle α21.

  Moreover, the length of the extending portion 28 is 30% to 50% of the length L20 along the virtual straight line 20E from the end m21 to the end m25.

  Further, in the range from the end m21 to the contact point m24, the length (length L22 and length) along the virtual straight line 20E (that is, the zipper opening direction) of the curved portion (that is, the curved portion 24 and the curved portion 26). L23) is longer than the length (the sum of the length L21 and the length L25) along the virtual straight line 20E (that is, the zipper opening direction) of the straight portion (that is, the straight portion 22 and the straight portion 25), Specifically, the length of the curved portion along the virtual straight line 20E is twice or more than the length of the straight portion along the virtual straight line 20E.

  In addition, in one cut line C2, the cuts 20 have the same configuration, and the interval between the adjacent cuts 20 is basically the same, and is adjacent when at least the zipper C is formed in a straight line. The intervals between the cuts 20 are formed the same.

  When the cut line C1 is the first cut line, the cut line C2 is the second cut line, the cut 10 is the first cut, and the cut 20 is the second cut. When the cut line C1 is the second cut line, the cut line C2 is the first cut line, the cut 10 is the second cut, and the cut 20 is the first cut.

  In addition, as a case where the zipper C is formed in a curved shape, it is formed like a zipper C ′ shown in FIGS. 36 to 39, and the zipper C ′ has a cut line C1 ′ and a cut line C2 ′. The cut line C1 ′ is formed by arranging a plurality of cuts 10 in a line with an interval in a line, and the cut 10 is similar to the cut 10 of the cut line C1, and the straight part 12, the curved part 14, and the straight part. 15, the curved portion 16, and the extending portion 18 (see FIG. 38), and the extending portion 18 is substantially the same configuration as the cut line C <b> 1 except that it is formed in a curved shape along the zipper opening direction. .

  That is, the straight line portion 12 is positioned on the tangent line 15E of the virtual curve 11E at the end portion m11 so that the end portion (first end portion) m11 is located in front of the contact point (first contact point) m12 in the zipper opening direction. It is inclined with respect to it. The straight line portion 12 is formed in a straight line shape. An angle α11 with respect to the tangent line 15E of the straight line portion 12 is an angle smaller than 45 degrees. The straight line portion 12 is formed to be inclined with respect to the virtual straight line 10E ′ along the zipper opening direction, and the angle α11 ′ of the straight line portion 12 with respect to the virtual straight line 10E ′ forms an acute angle. The end portion m11 is located on the extension line to the front side of the extending portion 18. That is, the end part m11, the contact point (fourth contact point) m14 and the end part (second end part) m15 located at both ends of the extending part 18 are located on the same curve along the zipper opening direction. Yes.

  The imaginary straight line 10E 'is a straight line connecting an end m11 of a certain notch 10 and an end m11 of the next notch 10 in the zipper opening direction of a certain notch 10. The virtual curve 11E is a curve that is formed in the opening direction of the zipper C ′ and passes through the end portion m11 that is the front end of the straight portion 12 and the end portion m15 that is the rear end of the extending portion 18.

  The straight line portion 12 may be inclined with respect to a straight line connecting the end portion m11 and the contact point m15, and the angle of the straight line portion 12 with respect to the straight line may be smaller than 45 degrees.

  The curved portion 14 is formed in an arc shape from the end of the straight portion 12, and the tangent of the curved portion 14 at the contact point m12 between the curved portion 14 and the straight portion 12 overlaps the straight portion 12. .

  Further, the straight portion (which may be a second straight portion or a second inclined portion. The same applies in other cases) 15 is formed linearly from the rear end of the curved portion 14, and is inclined with respect to the virtual straight line 10E ′. The rear end of the straight line portion 15 is inclined so as to be closer to the virtual straight line 10E ′ (may be a virtual curve 11E) than the front end. That is, the straight line portion 15 is in contact with the curved portion 14 at a contact point (second contact point) m13-1, and is in contact with the curved portion 16 at a contact point (third contact point) m13-2. Is in front of the contact point m13-2 (X1 side) in the zipper opening direction, and the length from the contact point m13-2 to the virtual straight line 10E ′ is from the contact point m13-1 to the virtual straight line 10E ′. It is shorter than the length. Moreover, the length from the contact point m13-2 to the virtual curve 11E is shorter than the length from the contact point m13-1 to the virtual curve 11E.

  In addition, the tangent of the curve part 14 in the contact point m13-1 has overlapped with the linear part 15, and, thereby, it switches smoothly from the direction of the curve of the curved part 14 to the linear direction of the linear part 15.

  The straight portion 15 is inclined with respect to a straight line connecting the end portion m11 and the contact point m14, and is inclined so that the rear end of the straight portion 15 is closer to the straight line connecting the end portion m11 and the contact point m14 than the front end. It may be.

  In addition, the curved portion 16 is formed in an arc shape from the end of the curved portion 14, and the tangent line of the curved portion 16 at the contact point m <b> 13-2 overlaps the straight portion 15. To the curve direction of the curved portion 16 smoothly.

  The contact point m14 is located on the virtual curve 11E, the tangent line of the curved portion 16 at the contact point m14 overlaps with the tangent line of the extending portion 18 at the contact point m14, and the extending portion 18 is formed in the direction of the virtual curve 11E. ing.

  The extending portion 18 is formed in a curved shape along the zipper opening direction from the end of the curved portion 16. That is, the extending portion 18 is on the virtual curve 11E.

  38, the angle formed by the extension line 12E of the straight portion 12 and the extension line 16E of the straight portion 15 (the angle on the curved portion 14 side formed by the extension line 12E and the extension line 16E) in the notch 10 also. α12 is formed to be larger than 90 degrees, for example, 100 to 105 degrees.

  Further, the length of the extending portion 18 (the length along the virtual curve 11E) is 30% to 50% of the length L10 along the virtual curve 11E from the end m11 to the end m15. Further, the length of the extending portion 18 (the length along the virtual straight line 10E ′) is 30% to 50% of the length L10 ′ along the virtual straight line 10E ′ from the end m11 to the end m15. It may be. Instead of the virtual straight line 10E ′, a straight line connecting the end m11 and the contact point m15 is a virtual straight line, and the length along the straight line of the extending part 18 is the length from the end m11 to the end m15. It may be 30% to 50%.

  In the range from the end m11 to the contact point m14, the length along the virtual curve 11E of the curved portion (that is, the curved portion 14 and the curved portion 16) (the sum of the length L12 and the length L13) is a straight line. It is longer than the length (the sum of the length L11 and the length L15) of the portion (that is, the straight portion 12 and the straight portion 15) along the virtual curve 11E, specifically, the virtual curve 11E (that is, the curved portion) The length along the zipper opening direction) is at least twice the length along the virtual curve 11E of the straight line portion. In the range from the end m11 to the contact point m14, the length along the virtual straight line 10E ′ of the curved portion (that is, the curved portion 14 and the curved portion 16) (the sum of the length L12 ′ and the length L13 ′). Is longer than the length (the sum of the length L11 ′ and the length L15 ′) of the straight line portion (that is, the straight line portion 12 and the straight line portion 15) along the virtual straight line 10E ′. The length along the virtual straight line 10E ′ is at least twice the length along the virtual straight line 10E ′ of the straight line portion. Instead of the virtual straight line 10E ′, a straight line connecting the end m11 and the contact point m15 is a virtual straight line, and the length of the curved portion along the straight line is longer than the length of the straight portion along the straight line, Specifically, it may be twice or more.

  Note that, in one cut line C1 ′, the cuts 10 have the same configuration, and the interval between the adjacent cuts 10 is formed in principle the same, but the curve when the zipper C ′ is formed in a curved shape. When the curvature in the shape changes, the extending portion 18 is formed along the zipper opening direction, so the shape of the extending portion 18 is different.

  In addition, the cut line C2 ′ is a line in which a plurality of cuts 20 are arranged in a line with a space therebetween, and the cut 20 is similar to the cut line 20 of the cut line C2, and includes a straight line portion 22 and a curved line portion 24. The straight line portion 25, the curved portion 26, and the extending portion 28 (see FIG. 39), and substantially the same configuration as the cut line C2, except that the extending portion 28 is formed in a curved shape along the zipper opening direction. It is.

  That is, the straight line portion 22 is positioned on the tangent line 25E of the virtual curve 21E at the end portion m21 so that the end portion (first end portion) m21 is located in front of the contact point (first contact point) m22 in the zipper opening direction. It is inclined with respect to it. The straight portion 22 is formed in a straight line shape. An angle α21 with respect to the tangent line 25E of the straight line portion 22 is an angle smaller than 45 degrees. Further, the straight line portion 22 is formed to be inclined with respect to the virtual straight line 20E ′ along the zipper opening direction, and an angle α21 ′ of the straight line portion 22 with respect to the virtual straight line 20E ′ forms an acute angle. The end portion m21 is located on the extension line to the front side of the extending portion 28. That is, the end m21, the contact point (fourth contact point) m24 and the end (second end) m25 located at both ends of the extending part 28 are located on the same curve along the zipper opening direction. Yes.

  The imaginary straight line 20E 'is a straight line that connects an end m21 of a notch 20 and an end m21 of the next notch 20 in the zipper opening direction of the notch 20. The virtual curve 21E is a curve that is formed in the opening direction of the zipper A ′ and passes through the end m21 that is the front end of the linear portion 22 and the end m25 that is the rear end of the extending portion 28.

  The straight line portion 22 may be inclined with respect to a straight line connecting the end m21 and the contact point m25, and the angle of the straight line portion 22 with respect to the straight line may be smaller than 45 degrees.

  The curved portion 24 is formed in an arc shape from the end of the straight portion 22, and the tangent line of the curved portion 24 at the contact point m <b> 22 between the curved portion 24 and the straight portion 22 is overlapped with the straight portion 22. .

  Further, the straight part (a second straight part or a second inclined part may be used. The same applies to other parts) 25 is formed linearly from the rear end of the curved part 24 and is inclined with respect to the virtual straight line 20E ′. The rear end of the straight line portion 25 is inclined so as to be closer to the virtual straight line 20E ′ (may be a virtual curve 21E) than the front end. That is, the straight line portion 25 is in contact with the curved portion 24 at a contact point (second contact point) m23-1, and is in contact with the curved portion 26 at a contact point (third contact point) m23-2. Is in front of the contact point m23-2 (X1 side) in the zipper opening direction, and the length of the contact point m23-2 to the virtual straight line 20E ′ is the distance from the contact point m23-1 to the virtual straight line 20E ′. It is shorter than the length. The length from the contact point m23-2 to the virtual curve 21E is shorter than the length from the contact point m23-1 to the virtual curve 21E.

  Note that the tangent line of the curved portion 24 at the contact point m23-1 overlaps with the straight portion 25, thereby smoothly switching from the curve direction of the curved portion 24 to the straight direction of the straight portion 25.

  The straight portion 25 is inclined with respect to a straight line connecting the end portion m21 and the contact point m14, and is inclined so that the rear end of the straight portion 25 is closer to the straight line connecting the end portion m21 and the contact point m24 than the front end. It may be.

  Further, the curved portion 26 is formed in an arc shape from the end of the curved portion 24, and the tangent of the curved portion 24 at the contact point m23-2 overlaps with the straight portion 25, whereby the straight direction of the straight portion 25 is increased. To the curve direction of the curved portion 26 smoothly.

  Further, the contact point m24 is located on the virtual curve 21E, the tangent of the curved portion 26 at the contact point m24 overlaps with the tangent of the extending portion 28 at the contact point m24, and the extending portion 28 is also formed in the direction of the virtual curve 21E. ing.

  Moreover, the extending | stretching part 28 is formed in the curve shape along the zipper opening direction from the edge part of the curve part 26. As shown in FIG. That is, the extending portion 28 is on the virtual curve 21E.

  39, the angle formed by the extension line 22E of the straight line portion 22 and the extension line 26E of the straight line portion 25 (the angle on the curved line portion 24 side formed by the extension line 22E and the extension line 26E) in the notch 20 is also shown. α22 is formed to be greater than 90 degrees, for example, 100 to 105 degrees.

  Further, the length of the extending portion 28 (the length along the virtual curve 21E) is 30% to 50% of the length L20 along the virtual curve 21E from the end m21 to the end m25. The length of the extending portion 28 (the length along the virtual straight line 20E ′) is 30% to 50% of the length L20 ′ along the virtual straight line 20E ′ from the end m21 to the end m25. It may be. Instead of the virtual straight line 20E ′, a straight line connecting the end m21 and the contact point m25 is a virtual straight line, and the length along the straight line of the extending portion 28 is the length from the end m21 to the end m25. It may be 30% to 50%.

  In the range from the end m21 to the contact point m24, the length along the virtual curve 21E of the curved portion (that is, the curved portion 24 and the curved portion 26) (the sum of the length L22 and the length L23) is a straight line. It is longer than the length (the sum of the length L21 and the length L25) of the portion (that is, the straight portion 22 and the straight portion 25) along the virtual curve 21E. The length along the zipper opening direction) is at least twice the length along the virtual curve 21E of the straight line portion. Further, in the range from the end m21 to the contact point m24, the length along the virtual straight line 20E ′ of the curved portion (that is, the curved portion 24 and the curved portion 26) (the sum of the length L22 ′ and the length L23 ′). Is longer than the length (the sum of the length L21 ′ and the length L25 ′) of the straight line portion (that is, the straight line portion 22 and the straight line portion 25) along the virtual straight line 20E ′. The length along the virtual straight line 20E ′ is at least twice the length along the virtual straight line 20E ′ of the straight line portion. Instead of the virtual straight line 20E ′, a straight line connecting the end m21 and the contact point m25 is a virtual straight line, and the length of the curved portion along the straight line is longer than the length of the straight portion along the straight line, Specifically, it may be twice or more.

  In addition, in one cut line C2 ′, the cut 20 has the same configuration, and the interval between the adjacent cuts 20 is formed in principle the same, but the curve when the zipper C ′ is formed in a curved shape. When the curvature in the shape changes, the stretched portion 28 is formed along the zipper opening direction, so the shape of the stretched portion 28 is different.

  When the cut line C1 'is the first cut line, the cut line C2' is the second cut line, the cut 10 is the first cut, and the cut 20 is the second cut. When the cut line C1 'is the second cut line, the cut line C2' is the first cut line, the cut 10 is the second cut, and the cut 20 is the first cut.

  Even when the zipper C is formed in a curved shape, the notches 10 and 20 corresponding to each other in the plurality of cuts 10 and the plurality of cuts 20 are the lengths between the straight portion 12 of the cut 10 and the straight portion 22 of the cut 20. Are opposed to each other in a state where the length becomes longer toward the rear side in the zipper opening direction. That is, in the notch 10 and the notch 20 corresponding to each other, the notch 10 and the notch 20 face each other in a state where the contact point m12 is outside the end portion m11 and the contact point m22 is outside the end portion m21. Yes.

  Even when the zipper A is formed in a curved shape, the pair of cuts 10 and the cut 20 are basically formed symmetrically about the center line Ah ′ for each pair of cuts. However, since at least the extending portions 18 and 28 are formed along the zipper opening direction, they are not line symmetric. Moreover, also about the length of the extending | stretching parts 18 and 28, if the length of the extending | stretching part 18 and the length of the extending | stretching part 28 are made the same, along the virtual curve 11E of the clearance gap between the adjacent notches 10 in cut line A1 '. In this case, the length of the extending portion 18 is set to the length of the extending portion 28. It is preferable to make the gap between the adjacent cuts as long as possible, and even in this case, the pair of cuts 10 and the cuts 20 are not line-symmetric.

  Further, the cut A3 is the same as the cut A3 in the first embodiment. The cut A3 includes the cut 32, the cut 34, and the cut 36, the cut 32 is on the virtual straight line 10E, and the cut 34 is a virtual cut. It is on the straight line 20E. A region surrounded by the cut A <b> 3 is a piece 30.

  In the above description, the curved portions 14 and 24 and the curved portions 16 and 26 are arcuate, but may be elliptical arcs instead of arcs. That is, even if the curved portions 14 and 24 and the curved portions 16 and 26 are formed in an elliptical arc shape instead of the circular arc shape, the same operation and effect as described above can be obtained. Further, the curved portion 14 does not have to be an arc shape or an elliptical arc shape as long as the curved portion 14 is formed in a curved shape that curves in the bending direction that turns to the zipper opening direction side in the bending direction with respect to the direction of the linear portion 12 from the contact point m12. In addition, the curved portion 24 may not be an arc shape or an elliptical arc shape as long as the curved portion 24 is formed in a curved shape that curves in the bending direction with respect to the direction of the linear portion 22 from the contact point m22. The curved portion 16 does not have to be arc-shaped or elliptical arc-shaped as long as the curved portion 16 is formed in a curved shape that curves in a direction opposite to the curved direction of the curved portion 14 from the contact point m13-2. Is not necessarily arcuate or elliptical arcuate as long as it is formed in a curved shape curved from the contact point m23-2 to the bending direction opposite to the bending direction of the curved portion 24.

  When using the zipper C, the piece 30 is raised, grasped by hand, and pulled in the X2 direction (opening direction), thereby breaking the gap between the adjacent cuts 10 and the gap between the adjacent cuts 20 and breaking the zipper C. Is done. Thereby, the strip | belt-shaped part pinched | interposed by the cut line C1 and the cut line C2 isolate | separates from a blank, and the clearance gap after separating a strip | belt-shaped part is formed in a blank. The blank has cut surfaces on both sides of the gap.

  The effect of the zipper C is the same as that of the zipper A of the first embodiment. That is, in the zipper C, the end m11 is located on the imaginary straight line 10E, and the extending part 18 is on the imaginary straight line 10E, so that the breaking force from the extending part 18 is easily transmitted to the end m11. . Even when the center of the breaking force from the rear end of the extending portion 18 faces the outside, the breaking force can be received because the straight portion 12 and the curved portion 14 are provided. Therefore, the zipper A can be smoothly broken. Further, since the peeling is hardly caused by receiving the breaking force by the straight portion 12 or the curved portion 14, the appearance of the cut surface can be improved. When the blank is thin (for example, E flute, F flute, G flute), the joint between the cuts 10 can be broken with a weak force. Even if the center of the rupture force is directed inward, if it is ruptured with a weak force, the center does not move greatly inward, so that the rupture force can be received at the end m11. Even when the center of the breaking force is directed outward, if it is broken with a weak force, it does not greatly go outward. Therefore, even if the length between the apex of the curved portion 14 and the virtual straight line 10E is short, the fracture occurs. The force can be received by the straight portion 12 and the curved portion 14, and therefore the zipper C can be smoothly broken. Similarly, the end m21 is located on the virtual straight line 20E, and the extending part 28 is on the virtual straight line 20E. Therefore, the breaking force from the extending part 28 is easily transmitted to the end m21, and the extending part 28 is stretched. Even when the center of the breaking force from the rear end of the portion 28 faces outward, the straight portion 22 and the curved portion 24 are provided, so that the breaking force can be received, and therefore the cut line zipper C can be smoothly formed. Can break. Further, since the peeling is hardly caused by receiving the breaking force by the straight portion 12 or the curved portion 14, the appearance of the cut surface can be improved.

  Even when the zipper opening direction is curved, the end m11 is located on the virtual curve 11E, and the extending portion 18 is on the virtual curve 11E, so that the breaking force from the extending portion 18 is the end. It is easy to be transmitted to the part m11, and even when the center of the breaking force from the rear end of the extending part 18 faces outward, the straight part 12 and the curved part 14 are provided, so that the breaking force can be received, Therefore, the zipper C ′ can be smoothly broken, and the appearance of the cut surface can be improved. Similarly, since the end m21 is located on the virtual curve 21E and the extending part 28 is on the virtual curve 21E, the breaking force from the extending part 28 is easily transmitted to the end m21. Even when the center of the breaking force from the rear end of the portion 28 faces outward, since the straight portion 22 and the curved portion 24 are provided, the breaking force can be received, and the zipper C ′ can be smoothly broken. And the appearance of the cut surface can be improved.

  As described above, the zippers C and C 'are particularly suitable when the thickness of the blank is thin (the same applies to the cut lines D1 and D2 described later).

  Further, in the zipper C, the end m11 is located on the virtual straight line 10E, and the extending part 18 is on the virtual straight line 10E, and the breaking force from the extending part 18 is easily transmitted to the end m11, Moreover, in the notch 10, since it forms in the protruding shape by the linear part 12, the curved part 14, the linear part 15, and the curved part 16, the appearance of a cut surface can be improved. Similarly, in the zipper C, the end m21 is located on the virtual straight line 20E, and the extending part 28 is on the virtual straight line 20E, so that the breaking force from the extending part 28 is easily transmitted to the end m21. In addition, since the cut 20 is formed in a protruding shape by the straight portion 22, the curved portion 24, and the curved portion 26, the appearance of the cut surface can be improved.

  That is, when the zipper C is broken, the projecting portions T1 and T2 (see FIG. 47) as in Patent Document 2 are not formed on the cut surface, and the projecting portions T1 and T2 are not temporarily formed. Even if the protruding portion is formed, it is an extremely small protruding portion, so that the appearance of the cut surface can be improved, and further, the straight portions 12, 22 and the curved portions 14, 24 and the straight portions 15, 25 can be obtained. And the curved portions 16 and 26 are formed by a smooth curve having an arc or an elliptical arc, in particular, by the curved portions 14 and 24 and the curved portions 16 and 26, so that the cut surface also looks good. Can be better.

  Even when the zipper opening direction is curved, the end m11 is located on the virtual curve 11E, and the extending part 18 is on the virtual curve 11E, and the breaking force from the extending part 18 is the end part. It is easy to be transmitted to m11, and the cut 10 is formed in a protruding shape by the straight portion 12, the curved portion 14, and the curved portion 16, so that the appearance of the cut surface can be improved. Similarly, the end m21 is located on the imaginary curve 21E, and the extending portion 28 is on the imaginary curve 21E, so that the breaking force from the extending portion 28 is easily transmitted to the end m21, and the notch 20 In FIG. 3, since the straight portion 22, the curved portion 24, and the curved portion 26 are formed in a projecting shape, the appearance of the cut surface can be improved.

  Further, since the angle α11 formed by the straight line portion 12 and the virtual straight line 10E is smaller than 45 degrees, the impact when the breaking force from the previous notch 10 is transmitted to the straight line portion 12 is extremely small, and the angle α12 is 90 degrees. Therefore, the breaking force from the straight portion 12 can be smoothly transmitted to the extending portion 18, and the zipper C can be smoothly broken. Similarly, since the angle α21 formed by the straight line portion 22 and the virtual straight line 20E is smaller than 45 degrees and the angle α22 is larger than 90 degrees, the zipper C can be smoothly broken.

  Even when the zipper opening direction is curved, the angle α11 with respect to the tangent 15E of the virtual curve 11E at the end m11 of the straight line portion 12 is smaller than 45 degrees and the angle α12 is larger than 90 degrees. C ′ can be smoothly broken. Similarly, the angle α21 with respect to the tangent line 25E of the virtual curve 21E at the end m21 of the straight line portion 22 is an angle smaller than 45 degrees, and the angle α22 is larger than 90 degrees. Can be broken.

  Moreover, when the length of the extending portion 18 is 30% or more of the length L10, the breaking force is applied from the rear end (that is, the end portion m15) of the extending portion 18 to the front end ( That is, it becomes easy to transmit to the end portion m11), and the length α of the extending portion 18 is 50% or less of the length L10, so that the angle α11 of the straight portion 12 with respect to the virtual straight line 10E is made smaller than 45 degrees. On the other hand, the length L15 from the vertex of the curved portion 14 to the virtual straight line 10E and the length of the straight portion 12 can be secured long enough to prevent peeling. In addition, if peeling does not occur, the appearance of the cut surface does not deteriorate, and the zipper can be smoothly broken. Similarly, when the length of the extending portion 28 is 30% or more of the length L20, the breaking force is applied from the rear end (that is, the end portion m25) of the extending portion 28 to the front end of the straight portion 22 of the next cut 20. (That is, the end portion m21) can be easily transmitted, and the length α of the extending portion 28 is 50% or less of the length L20, so that the angle α21 of the straight portion 22 with respect to the virtual straight line 20E is smaller than 45 degrees. However, the length L25 from the apex of the curved portion 24 to the virtual straight line 20E and the length of the straight portion 22 can be secured long enough to prevent peeling.

  Even when the zipper opening direction is curved, the length of the stretched portion 18 is 30% or more of the length L10 along the virtual curve 11E. Since the length of the extending portion 18 is 50% or less of the length L10 along the virtual curve 11E, the angle α11 of the straight portion 12 with respect to the tangent line 15E is 45 degrees. The length from the apex of the curved portion 14 to the virtual curve 11E and the length of the straight portion 12 can be secured long enough to prevent peeling. In addition, if peeling does not occur, the appearance of the cut surface does not deteriorate, and the zipper can be smoothly broken. Similarly, the length of the stretched portion 28 (the length along the virtual curve 21E) is 30% or more of the length L20 along the virtual curve 21E. It is easy to transmit to the front end of the straight portion 22 of the cut 20 and the length of the extending portion 28 is 50% or less of the length L20 along the virtual curve 21E, so the angle α21 with respect to the tangent line 25E of the straight portion 22 is 45. The length from the apex of the curved portion 24 to the virtual curve 21E and the length of the straight portion 22 can be ensured to be long enough to prevent peeling while being smaller than the degree.

  In the range from the end m11 to the contact point m14, the length of the curved portion along the zipper opening direction is longer than the length of the straight portion along the zipper opening direction (specifically, the opening of the curved portion). Since the length along the direction is more than twice the length along the opening direction of the straight portion), by making the unevenness in the notch 10 inconspicuous, the appearance of the cut surface can be improved, Further, the zipper can be smoothly broken by smoothly transmitting the breaking force to the extending portion 18. Similarly, in the range from the end m21 to the contact point m24, the length of the curved portion along the zipper opening direction is longer than the length of the straight portion along the zipper opening direction (specifically, the curved portion Since the length along the zipper opening direction is twice or more the length along the opening direction of the straight line portion), the unevenness in the cut 20 can be made inconspicuous to improve the appearance of the cut surface. In addition, by smoothly transmitting the breaking force to the extending portion 28, the zipper can be smoothly broken.

  In addition, even when the zipper opening direction is a curved line, the length along the virtual curve 11E of the curved portion is longer than the length along the virtual curve 11E of the straight portion in the range from the end m11 to the contact point m14. (Specifically, the length of the curved portion along the virtual curve 11E (that is, the zipper opening direction) is more than twice the length of the straight portion along the virtual curve 11E (curved portion). The length along the virtual straight line 10E ′ of the straight line portion is longer than the length along the virtual straight line 10E ′ of the straight line portion (specifically, the length along the virtual straight line 10E ′ of the curved portion is equal to the virtual portion of the straight line portion) Since it may be more than twice the length along the straight line 10E ′)))), the appearance of the cut surface can be improved by making the unevenness in the cut 10 inconspicuous, and the breaking force can be improved. To the extension 18 By telling the over's, it can be broken zipper smoothly. Similarly, in the range from the end m21 to the contact point m24, the length of the curved portion along the virtual curve 21E is longer than the length of the straight portion along the virtual curve 21E (specifically, the length of the curved portion The length along the virtual curve 21E is more than twice the length along the virtual curve 21E of the straight line portion (the length along the virtual straight line 20E ′ of the curve portion is equal to the virtual straight line 20E of the straight line portion. Longer than the length along '(specifically, the length along the imaginary straight line 20E' of the curved portion is more than twice the length along the imaginary straight line 20E 'of the straight portion. Therefore, the appearance of the cut surface can be improved by making the unevenness in the cut 20 inconspicuous, and the zipper can be smoothly broken by smoothly transmitting the breaking force to the extending portion 18.

  Further, at the boundary between the respective parts constituting the cuts 10 and 20, the zipper C can be smoothly broken because the cut direction is smoothly switched as described above.

  Moreover, since the component part 11 which consists of the linear part 12, the curved part 14, the linear part 15, the curved part 16, the linear part 22, the curved part 24, the linear part 25, and the curved part 26 is provided, When a force is applied to the blank in which the zipper C is formed in a direction perpendicular to the surface of the blank, the breaks of the cut lines C1 and C2 can be reduced.

  That is, when the area of the band-like portion between the cut line C1 and the cut line C2 is pressed, the band-like portion sinks due to the range in which the length between the component part 11 and the component part 21 becomes shorter as the distance from the pressed area increases. Can be controlled, and gap breakage and chain of breakage can be prevented.

  Even when the zipper opening direction is a curved line, when the region of the belt-like portion (the belt-like portion between the cut line C1 ′ and the cut line C2 ′) is pushed, the length between the constituent parts 11 and 21 is pushed. It is possible to restrict the band-like portion from sinking due to a range that becomes shorter as the distance from the region is increased, and it is possible to prevent breakage of the gap and chain of breakage.

  Further, even when the region outside the belt-like portion 40 is pressed, the length between the virtual straight line passing through the pressed region along the zipper opening direction and the component parts 11 and 21 decreases as the distance from the region increases. In such a range, it is possible to prevent the outer region from sinking, so that breakage of the gap and chain of breaks can be prevented.

  Even when the zipper opening direction is a curved line, a virtual curve passing through the pressed area in the range of the components 11 and 21 along the zipper opening direction (virtual curve parallel to the virtual curves 11E and 21E) In the range in which the length between the constituent parts 11 and 21 decreases as the distance from the region increases, the outer region can be prevented from sinking, so that breakage of the gap and chain of breaks can be prevented.

  Next, a cut line D1 as a paper box cutting structure according to the present invention is configured as shown in FIG. 40, and a plurality of cuts 10 are linearly arranged in a row at intervals. The line D1 has the same configuration as the cut line C1 in the third embodiment (the cut line D1 shown in FIG. 40 has the same configuration as the cut line C1 shown in FIGS. 31 to 33 of the third embodiment). The cuts 10 are arranged in a row with a gap therebetween, and the cuts 10 have the same configuration as the cuts 10 in the third embodiment, and thus detailed description thereof is omitted. That is, the notch 10 includes a straight portion 12, a curved portion 14, a straight portion 15, a curved portion 16, and an extending portion 18.

  When using the cut line D1, the cut line opening direction (which may be referred to as "cut line breaking direction") is the direction from the X1 side to the X2 side in FIG. 40, the X1 side is the front side in the cut line opening direction, The X2 side is the rear side in the cut line opening direction. The break line opening direction of the present embodiment and the zipper opening direction of Embodiment 3 are the same direction, and instead of the zipper opening direction of Embodiment 1, it is the break line opening direction. 40 shows a case where the opening direction of the cut line is linear (when the cut line is formed in a straight line, the cut line may be formed in a straight line).

  When the opening direction of the cut line D1 is linear (when the cut line D1 is formed in a straight line), the cut line D1 has the same configuration as the cut line C1 in the first embodiment. When the opening direction of the line D1 is curved (when the cut line D1 is formed in a curved line) (that is, when the cut 10 in FIG. 40 is arranged in a curved line), the cut line D1 is The configuration is the same as the cut line C1 ′ in Example 3.

  Further, the cut line D2 as the paper box cutting structure according to the present invention is configured as shown in FIG. 41, in which a plurality of cuts 20 are linearly arranged in a line at intervals. D2 has the same configuration as the cut line C2 in the third embodiment (the cut line D2 shown in FIG. 41 has the same configuration as the cut line C2 shown in FIGS. 31, 32, and 35 of the third embodiment). A plurality of cuts 20 are arranged in a row with a space therebetween, and the cuts 20 have the same configuration as the cuts 20 in the third embodiment, and thus detailed description thereof is omitted. That is, the cut 20 includes a straight portion 22, a curved portion 24, a straight portion 25, a curved portion 26, and an extending portion 28.

  When using the cut line D2, the cut line opening direction (may be referred to as "cut line breaking direction") is the direction from the X2 side to the X1 side in FIG. 41, the X2 side is the front side in the cut line opening direction, The X1 side is the rear side in the cut line opening direction. The break line opening direction of the present embodiment and the zipper opening direction of Embodiment 3 are the same direction, and instead of the zipper opening direction of Embodiment 1, it is the break line opening direction. FIG. 41 shows a case where the opening direction of the cut line is linear (when the cut line is formed in a straight line, the cut line may be formed in a straight line).

  In addition, when the opening direction of the cut line D2 is linear (when the cut line D2 is formed in a straight line), the cut line D2 has the same configuration as the cut line C2 in Example 3, and the cut line When the opening direction of the line D2 is curved (when the cut line D2 is formed in a curved line) (that is, when the cut 20 in FIG. 41 is arranged in a curved line), the cut line D2 is The configuration is the same as the cut line C2 ′ in Example 3.

  Here, in the case of the cut line D1 and the cut line D2, the same effect as in the third embodiment can be obtained.

  That is, in the cut line D1, the end m11 is located on the virtual straight line 10E, and the extending part 18 is on the virtual straight line 10E, so that the breaking force from the extending part 18 is transmitted to the end m11. In addition, even when the center of the breaking force from the rear end of the extending portion 18 faces outward, the straight portion 12 and the curved portion 14 are provided, so that the breaking force can be received and the cut line D1 is It can be broken smoothly, and the appearance of the cut surface can be improved. Similarly, in the cut line D2, the end m21 is located on the virtual straight line 20E, and the extending part 28 is on the virtual straight line 20E, so that the breaking force from the extending part 28 is applied to the end m21. Even when the center of the breaking force from the rear end of the extending portion 28 is directed outward, the straight portion 22 and the curved portion 24 are provided, so that the breaking force can be received. The line D2 can be smoothly broken, and the appearance of the cut surface can be improved.

  Even when the opening direction of the cut line is curved, the end m11 is located on the virtual curve 11E, and the extending portion 18 is on the virtual curve 11E, so that the breaking force from the extending portion 18 is Even when the center of the breaking force from the rear end of the extending portion 18 faces outside, the straight portion 12 and the curved portion 14 are provided so that the breaking force can be received. Therefore, the cut line can be smoothly broken and the appearance of the cut surface can be improved. Similarly, since the end m21 is located on the virtual curve 21E and the extending part 28 is on the virtual curve 21E, the breaking force from the extending part 28 is easily transmitted to the end m21. Even when the center of the breaking force from the rear end of the portion 28 is directed outward, the breaking force can be received because the straight portion 22 and the curved portion 24 are provided, and thus the break line is smoothly broken. And the appearance of the cut surface can be improved.

  In the cut line D1, the end m11 is located on the virtual straight line 10E, and the extending part 18 is on the virtual straight line 10E, so that the breaking force from the extending part 18 is easily transmitted to the end m11. Moreover, in the notch 10, since it forms in the shape of a protrusion by the linear part 12, the curved part 14, the linear part 15, and the curved part 16, the appearance of a cut surface can be improved. Similarly, in the cut line D2, the end m21 is located on the virtual straight line 20E, and the extending part 28 is on the virtual straight line 20E, and the breaking force from the extending part 28 is transmitted to the end m21. In addition, since the cut 20 is formed in a projecting shape by the straight portion 22, the curved portion 24, the straight portion 25, and the curved portion 26, the appearance of the cut surface can be improved.

  Even when the opening direction of the cut line is curved, the end m11 is located on the virtual curve 11E, and the extending part 18 is on the virtual curve 11E, and the breaking force from the extending part 18 is the end. It is easy to be transmitted to the part m11, and in the notch 10, the straight part 12, the curved part 14, the straight part 15 and the curved part 16 are formed in a protruding shape, so that the appearance of the cut surface can be improved. Similarly, the end m21 is located on the imaginary curve 21E, and the extending portion 28 is on the imaginary curve 21E, so that the breaking force from the extending portion 28 is easily transmitted to the end m21, and the notch 20 In FIG. 2, since the straight portion 22, the curved portion 24, the straight portion 25 and the curved portion 26 are formed in a protruding shape, the appearance of the cut surface can be improved.

  In addition, since the angle α11 formed by the straight line 12 and the virtual straight line 10E in the cut line D1 is smaller than 45 degrees, the impact when the breaking force from the previous notch 10 is transmitted to the straight line 12 is extremely small. Since the angle α12 is larger than 90 degrees, the breaking force from the straight line portion 12 can be smoothly transmitted to the extending portion 18, and the cut line D1 can be smoothly broken. Similarly, since the angle α21 formed by the straight line portion 22 and the virtual straight line 20E is smaller than 45 degrees in the cut line D2, the impact when the breaking force from the previous notch 20 is transmitted to the straight line portion 22 is extremely small. Further, since the angle α22 is larger than 90 degrees, the breaking force from the straight line portion 22 can be smoothly transmitted to the extending portion 28, and thus the cut line D2 can be smoothly broken.

  Even when the cut line opening direction is curved, the angle α11 with respect to the tangent line 15E of the virtual curve 11E at the end m11 of the straight line portion 12 is smaller than 45 degrees, and the angle α12 is 90 degrees. Therefore, the breaking force from the straight line portion 12 can be smoothly transmitted to the extending portion 18, so that the cut line can be smoothly broken. Similarly, the angle α21 with respect to the tangent line 25E of the virtual curve 21E at the end m21 of the straight line portion 22 is an angle smaller than 45 degrees, and the angle α22 is larger than 90 degrees. The breaking force can be smoothly transmitted to the extending portion 28, and thus the cut line can be smoothly broken.

  Further, when the length of the extending portion 18 is 30% or more of the length L10 in the cut line D1, the breaking force is changed from the rear end (that is, the end portion m15) of the extending portion 18 to the straight line of the next notch 10. It becomes easy to transmit to the front end of the part 12 (that is, the end part m11), and the length α of the extending part 18 is 50% or less of the length L10, so that the angle α11 of the straight part 12 with respect to the virtual straight line 10E is 45. The length L15 from the apex of the curved portion 14 to the virtual straight line 10E and the length of the straight portion 12 can be ensured to be long enough to prevent peeling while being smaller than the degree. In addition, if peeling does not occur, the appearance of the cut surface does not deteriorate, and the zipper can be smoothly broken. Similarly, when the length of the extending portion 28 is 30% or more of the length L20, the breaking force is applied from the rear end (that is, the end portion m25) of the extending portion 28 to the front end of the straight portion 22 of the next cut 20. (That is, the end portion m21) can be easily transmitted, and the length α of the extending portion 28 is 50% or less of the length L20, so that the angle α21 of the straight portion 22 with respect to the virtual straight line 20E is smaller than 45 degrees. However, the length L25 from the apex of the curved portion 24 to the virtual straight line 20E and the length of the straight portion 22 can be secured long enough to prevent peeling.

  Even when the cut line opening direction is curved, the length of the extending portion 18 (the length along the virtual curve 11E) is 30% or more of the length L10 along the virtual curve 11E (the extending portion 18). (“The length along the virtual straight line 10E ′) may be 30% or more of the length L10 ′ along the virtual straight line 10E ′”). Is easily transmitted to the front end of the straight portion 12 of the next cut 10, and the length of the extending portion 18 (the length along the virtual curve 11E) is 50% or less of the length L10 along the virtual curve 11E. (The length of the stretched portion 18 (“the length along the virtual straight line 10E ′) may be 50% or less of the length L10 ′ along the virtual straight line 10E ′”) While the angle α11 with respect to 15E is smaller than 45 degrees, The length of the length or the linear part 12 from a point to the virtual curve 11E may be secured long enough to peeling does not occur. Similarly, the length of the extending portion 28 (the length along the virtual curve 21E) is 30% or more of the length L20 along the virtual curve 21E (the length of the extending portion 28 (in the “virtual straight line 20E ′”). The length along the imaginary straight line 20E ′ may be 30% or more of the length L20 ′ ”), and the breaking force is applied to the straight portion 22 of the next cut 20 from the rear end of the extending portion 28. It is easy to convey to the front end, and the length of the extending portion 28 (the length along the virtual curve 21E) is 50% or less of the length L20 along the virtual curve 21E (the length of the extending portion 28 (“virtual” (The length along the straight line 20E ′) may be 50% or less of the length L20 ′ along the virtual straight line 20E ′ ”), and therefore the angle α21 of the straight line portion 22 with respect to the tangent line 25E is smaller than 45 degrees. However, the length from the vertex of the curved portion 24 to the virtual curve 21E It is possible to ensure a long length of the line section 22 to the extent that peeling does not occur.

  In the range from the end m11 to the contact point m14, the length of the curved portion along the zipper opening direction is longer than the length of the straight portion along the zipper opening direction (specifically, the opening of the curved portion). Since the length along the direction is more than twice the length along the opening direction of the straight portion), by making the unevenness in the notch 10 inconspicuous, the appearance of the cut surface can be improved, Further, by smoothly transmitting the breaking force to the extending portion 18, the cut line can be smoothly broken. Similarly, in the range from the end m21 to the contact point m24, the length of the curved portion along the zipper opening direction is longer than the length of the straight portion along the zipper opening direction (specifically, the curved portion Since the length along the zipper opening direction is twice or more the length along the opening direction of the straight line portion), the unevenness in the cut 20 can be made inconspicuous to improve the appearance of the cut surface. In addition, by smoothly transmitting the breaking force to the extending portion 28, the cut line can be smoothly broken.

  In addition, even when the opening direction of the cut line is curved, the length along the virtual curve 11E of the curved portion (that is, the curved portion 14 and the curved portion 16) (in the range from the end portion m11 to the contact point m14) ( The sum of the length L12 and the length L13) is longer than the length along the virtual curve 11E of the straight line portion (that is, the straight line portion 12 and the straight line portion 15). , The length along the zipper opening direction) is more than twice the length along the imaginary curve 11E of the straight line portion (the length along the imaginary straight line 10E ′ of the curve portion is imaginary of the straight line portion) It is longer than the length along the straight line 10E ′ (specifically, the length along the virtual straight line 10E ′ of the curved line portion is twice or more than the length along the virtual straight line 10E ′ of the straight line portion. Can also be)))) By inconspicuous unevenness, it is possible to improve the appearance of the cut surface, also by transferring the breaking force smoothly extending portion 18, can break the score line smoothly. Similarly, in the range from the end m21 to the contact point m24, the length of the curved portion (that is, the curved portion 24 and the curved portion 26) along the virtual curve 21E is the straight portion (that is, the straight portion 22 and the straight portion). 25) longer than the length along the virtual curve 21E (specifically, the length along the virtual curve 21E of the curved portion (that is, the zipper opening direction) is the length along the virtual curve 21E of the straight portion. (The length of the curved portion along the virtual straight line 20E 'is longer than the length of the straight portion along the virtual straight line 20E' (specifically, the virtual straight line 20E 'of the curved portion). And the length along the virtual straight line 20E ′ of the straight line portion may be twice or more)))) By making the unevenness in the cut 20 inconspicuous, the appearance of the cut surface is improved. Can do well, also By transmitting the breaking force smoothly extending portion 18, it can break the score line smoothly.

  Further, the notch 10 is provided with a constituent part 11 including a straight part 12, a straight part 15, a curved part 14, and a curved part 16, and the cut 20 has a straight part 22, a curved part 24, a straight part 25, and a curved part. 26, when the force is applied in a direction perpendicular to the surface of the blank with respect to the blank formed with the cut line D1 or the cut line D2, that is, the cut line D1, The breakage of D2 can be reduced.

  In other words, in a range where the length between the virtual straight line (or virtual curve) along the cut line opening direction and the component parts 11 and 21 is a virtual straight line passing through the pressed area and becomes shorter as the distance from the area increases, Since the area on the side of the area can be prevented from sinking, breakage of the gap and chain of breaks can be prevented.

  In the drawings, in FIGS. 3 to 5, 8, 9, 12, 13, 33 to 35, 38, and 39, in order to clarify the positions of end portions and contact points. Although the black circles are attached to the positions of the end portions and the contact points, actually, there is no provision corresponding to the black circles. In the description of each of the above embodiments, the “contact point” may be a “contact”.

A, A ′, C, C ′ Zipper A1, A1 ′, A2, A2 ′, B1, B2, C1 ′, C2 ′, D1, D2, K5, K10, K11, K12, K13, K14, K15, K20, K22, K24, K24-1, K24-2, K30, K32, K34, K34-1, K34-2, K40, K41, K42, K43, K44, K45 Cut line 10, 10-0, 10-1, 10 -2, 10-3, 20, 20-0, 20-1, 20-2, 20-3, 32, 34, 36 Incision 12, 15, 22, 25 Straight part 14, 16, 24, 26 Curve part 18 , 28 Stretched portion 40 Band-shaped portion 42, 44, R1, R2, R3, R4 region 50 Gap 52, 54 Cut surface 10E, 10E ', 20E, 20E' Virtual straight line 11E, 21E Virtual curve 12E, 16E, 22E, 26E Extension Line 14 E, 15E, 24E, 25E Tangent line Ah, Ah ′ Center line m11, m15, m21, m25 End m12, m13, m13-1, m13-2, m14, m22, m23, m23-1, m23-2, m24 Contact point P, Q Paper box 105 Sleeve portion 150 Bottom portion 192 Lid portion 194 Insertion piece portion 205 Sleeve portion 210 Front portion 212 Lower front portion 215 Upper front portion 220 Right side portion 222 Lower right side portion 225 Upper right side portion 226, 236 Front side region 227, 237 Back side region 230 Left side surface portion 232 Lower left side surface portion 235 Upper left side surface portion 240 Back surface portion 242 Lower back surface portion 243 Lower back surface portion main body 244 Push portion 245 Upper back surface portion 246 Central region 247 Right side region 248 Left side region 310 340 Lid portion 320, 330 Flap portion 400 Bottom portion A-1 Lower side Generating unit A-2 the upper structure portion

Claims (24)

A zipper for a paper box used for a paper box formed by a sheet-like paper blank,
Having a first cut line and a second cut line;
The zipper opening direction is linear,
The first cut line is formed by arranging a plurality of first cuts (10) in a row at intervals,
The second cut line is formed by arranging a plurality of second cuts (20) in a row at intervals,
Each of the first cut and the second cut
The first curve portion (14, 24) formed from the straight line portion (12, 22), the first contact point (m12, m22) which is one end of the straight line portion, and the first contact of the first curve portion. The second curved portion (16, 26) formed from the second contact point (m13, m23), which is the end opposite to the point, and the end opposite to the second contact point of the second curved portion Having a stretched portion (18, 28) formed from a third contact point (m14, m24),
In each of the first cut and the second cut,
The straight line part is formed in a straight line between the first end part (m11, m21) which is the other end part of the straight line part and the first contact point, and the first curved part is the first contact point and the second contact point. The second curved portion is formed in a curved shape between the second contact point and the third contact point, and the extended portion is opposite to the third contact point of the third contact point and the extended portion. It is formed in a straight line between the second ends (m15, m25) which are the end portions on the side,
The stretched part is formed in the zipper opening direction,
The first end is located on a virtual straight line (10E, 20E) passing through the third contact point and the second end in a virtual straight line in the zipper opening direction,
The straight line portion is formed to be inclined with respect to the direction of the imaginary straight line so that the first end portion is located on the front side in the zipper opening direction from the first contact point,
The first curved portion is formed in a bending direction that is bent toward the zipper opening direction in the bending direction with respect to the direction of the linear portion from the first contact point, and the second curved portion is bent from the second contact point to the first curved portion. Is formed in the opposite direction of bending,
The first contact point is located on the front side in the zipper opening direction with respect to the second contact point, the second contact point is located on the front side in the zipper opening direction with respect to the third contact point,
The second cut line is formed symmetrically with respect to the center line between the first cut line and the first cut and the second cut corresponding to each other in the plurality of first cuts and the plurality of second cuts are A paper box characterized in that the first cut and the second cut are formed symmetrically with respect to each other so that the first cut and the second cut face each other in a state where the one contact point is outside the first end. Zipper for. The zipper for a paper box according to claim 1, wherein the first curved portion and the second curved portion are formed in an arc shape or an elliptical arc shape. The angle between the extension line (12E, 22E) from the first contact point of the straight line portion and the tangent line (12E, 22E) at the second contact point of the first curve portion, and the angle (α12, The zipper for paper boxes according to claim 1 or 2, wherein α22) is formed to be larger than 90 degrees. The zipper for paper box according to claim 1, 2 or 3, wherein an acute angle between the straight portion and the virtual straight line is smaller than 45 degrees. In each of the first cut and the second cut, the length (L12, L22) along the zipper opening direction of the first curved portion and the zipper of the second curved portion in the range from the first end to the third contact point The sum of the lengths (L13, L23) along the opening direction is longer than the lengths (L11, L21) along the zipper opening direction of the linear portion. Zipper for paper box as described. A cut line for a paper box used for a paper box formed by a sheet-like paper blank,
The opening direction of the cut line is linear,
The cut line for the paper box is formed by arranging a plurality of cuts (10, 20) in a row at intervals,
The depth of cut
The first curve portion (14, 24) formed from the straight line portion (12, 22), the first contact point (m12, m22) which is one end of the straight line portion, and the first contact of the first curve portion. The second curved portion (16, 26) formed from the second contact point (m13, m23), which is the end opposite to the point, and the end opposite to the second contact point of the second curved portion Having a stretched portion (18, 28) formed from a third contact point (m14, m24),
The straight line part is formed in a straight line between the first end part (m11, m21) which is the other end part of the straight line part and the first contact point, and the first curved part is the first contact point and the second contact point. The second curved portion is formed between the second contact point and the third contact point in an arc shape or a curved shape, and the extended portion is the third contact point between the third contact point and the extended portion. Is formed in a straight line between the second ends (m15, m25) which are the ends opposite to the
The stretched part is formed in the direction of opening the cut line,
The first end is located on a virtual straight line (10E, 20E) passing through the third contact point and the second end in a virtual straight line in the opening direction of the cut line,
The straight line portion is formed to be inclined with respect to the direction of the imaginary straight line so that the first end portion is located on the front side in the cut line opening direction from the first contact point,
The first curved portion is formed in a bending direction that bends toward the cut line opening direction in the bending direction with respect to the direction of the straight portion from the first contact point, and the second curved portion is bent from the second contact point to the first curved portion. Formed in the direction opposite to the direction,
The first contact point is located on the front side in the cut line opening direction with respect to the second contact point, and the second contact point is located on the front side in the cut line opening direction with respect to the third contact point. Box cut line. The cut line for a paper box according to claim 6, wherein the first curved part and the second curved part are formed in an arc shape or an elliptical arc shape. The angle between the extension line (12E, 22E) from the first contact point of the straight line portion and the tangent line (12E, 22E) at the second contact point of the first curve portion, and the angle (α12, The cut line for a paper box according to claim 6 or 7, wherein α22) is formed to be larger than 90 degrees. The cut line for a paper box according to claim 6, 7 or 8, wherein an acute angle between the straight line portion and the virtual straight line is smaller than 45 degrees. In the range from the first end portion to the third contact point, the length (L12, L22) along the cut line opening direction of the first curved portion and the length (L13) along the cut line opening direction of the second curved portion. , L23) is longer than the length (L11, L21) along the opening direction of the cut line of the straight line portion, the cut line for a paper box according to claim 6, 7 or 8 or 9 . A zipper for a paper box used for a paper box formed by a sheet-like paper blank,
Having a first cut line and a second cut line;
The zipper opening direction is curved,
The first cut line is formed by arranging a plurality of first cuts (10) in a row at intervals,
The second cut line is formed by arranging a plurality of second cuts (20) in a row at intervals,
Each of the first cut and the second cut
The first curve portion (14, 24) formed from the straight line portion (12, 22), the first contact point (m12, m22) which is one end of the straight line portion, and the first contact of the first curve portion. The second curved portion (16, 26) formed from the second contact point (m13, m23), which is the end opposite to the point, and the end opposite to the second contact point of the second curved portion Having a stretched portion (18, 28) formed from a third contact point (m14, m24),
In each of the first cut and the second cut,
The straight line part is formed in a straight line between the first end part (m11, m21) which is the other end part of the straight line part and the first contact point, and the first curved part is the first contact point and the second contact point. The second curved portion is formed in a curved shape between the second contact point and the third contact point, and the extended portion is opposite to the third contact point of the third contact point and the extended portion. It is formed in a curved shape between the second ends (m15, m25) that are the end portions on the side,
The stretched part is formed in the zipper opening direction,
The first end is located on a virtual curve (11E, 21E) passing through the third contact point and the second end in a virtual curve in the zipper opening direction,
The straight line portion is formed so as to be inclined with respect to the tangent line (15E, 25E) of the virtual curve at the first end portion so that the first end portion is located in front of the first contact point in the zipper opening direction,
The first curved portion is formed in a bending direction that is bent toward the zipper opening direction in the bending direction with respect to the direction of the linear portion from the first contact point, and the second curved portion is bent from the second contact point to the first curved portion. Is formed in the opposite direction of bending,
The first contact point is located on the front side in the zipper opening direction with respect to the second contact point, the second contact point is located on the front side in the zipper opening direction with respect to the third contact point,
The first cut and the second cut corresponding to each other in the plurality of first cuts and the plurality of second cuts are opposed to each other in a state where the first contact point is outside the first end portion. Zipper for paper box. The zipper for a paper box according to claim 11, wherein the first curved portion and the second curved portion are formed in an arc shape or an elliptical arc shape. The angle between the extension line (12E, 22E) from the first contact point of the straight line portion and the tangent line (12E, 22E) at the second contact point of the first curve portion, and the angle (α12, The paper box zipper according to claim 11 or 12, wherein α22) is formed to be larger than 90 degrees. 14. The paper box according to claim 11, wherein an acute angle between the straight line portion and the tangent line (15E, 25E) of the virtual curve at the first end portion is smaller than 45 degrees. zipper. In each of the first cut and the second cut, the length (L12, L22) along the zipper opening direction of the first curved portion and the zipper of the second curved portion in the range from the first end to the third contact point The sum of the lengths (L13, L23) along the opening direction is longer than the lengths (L11, L21) along the zipper opening direction of the linear portion. Zipper for paper box as described. A cut line for a paper box used for a paper box formed by a sheet-like paper blank,
The opening direction of the cut line is curved,
The score line for the paper box is formed by arranging a plurality of cuts (10, 20) in a row at intervals,
The depth of cut
The first curve portion (14, 24) formed from the straight line portion (12, 22), the first contact point (m12, m22) which is one end of the straight line portion, and the first contact of the first curve portion. The second curved portion (16, 26) formed from the second contact point (m13, m23), which is the end opposite to the point, and the end opposite to the second contact point of the second curved portion Having a stretched portion (18, 28) formed from a third contact point (m14, m24),
The straight line part is formed in a straight line between the first end part (m11, m21) which is the other end part of the straight line part and the first contact point, and the first curved part is the first contact point and the second contact point. The second curved portion is formed in a curved shape between the second contact point and the third contact point, and the extended portion is opposite to the third contact point of the third contact point and the extended portion. It is formed in a curved shape between the second ends (m15, m25) that are the end portions on the side,
The stretched part is formed in the direction of opening the cut line,
The first end portion is located on a virtual curve (11E, 21E) passing through the third contact point and the second end portion in a virtual curve in the opening direction of the cut line,
The straight line portion is formed to be inclined with respect to the tangent lines (15E, 25E) of the virtual curve at the first end portion so that the first end portion is located on the front side in the opening direction of the cut line from the first contact point,
The first curved portion is formed in a bending direction that bends toward the cut line opening direction in the bending direction with respect to the direction of the straight portion from the first contact point, and the second curved portion is bent from the second contact point to the first curved portion. Formed in the direction opposite to the direction,
The first contact point is located on the front side in the cut line opening direction with respect to the second contact point, and the second contact point is located on the front side in the cut line opening direction with respect to the third contact point. Box cut line. The cut line for a paper box according to claim 16, wherein the first curved part and the second curved part are formed in an arc shape or an elliptical arc shape. The angle between the extension line (12E, 22E) from the first contact point of the straight line portion and the tangent line (12E, 22E) at the second contact point of the first curve portion, and the angle (α12, The cut line for a paper box according to claim 16 or 17, wherein α22) is formed to be larger than 90 degrees. 19. The paper box according to claim 16, wherein the acute angle between the straight line portion and the tangent line (15E, 25E) of the virtual curve at the first end is smaller than 45 degrees. Break line. In the range from the first end portion to the third contact point, the length (L12, L22) along the cut line opening direction of the first curved portion and the length (L13) along the cut line opening direction of the second curved portion. , L23) is longer than the length (L11, L21) along the cut line opening direction of the straight line portion, the cut line for a paper box according to claim 16, 17 or 18 or 19 . A zipper for a paper box used for a paper box formed by a sheet-like paper blank,
Having a first cut line and a second cut line;
The zipper opening direction is linear,
The first cut line is formed by arranging a plurality of first cuts (10) in a row at intervals,
The second cut line is formed by arranging a plurality of second cuts (20) in a row at intervals,
Each of the first cut and the second cut
A first curve portion (14, 24) formed from a first straight portion (12, 22), a first contact point (m12, m22) which is one end of the first straight portion, and a first curve portion The second straight line part (15, 25) formed from the second contact point (m13-1, m23-1) which is the end opposite to the first contact point, and the second contact of the second straight line part The second curve portion (16, 26) formed from the third contact point (m13-2, m23-2) that is the end opposite to the point is opposite to the third contact point of the second curve portion. It has an extension part (18, 28) formed from the fourth contact point (m14, m24) which is the end part on the side,
In each of the first cut and the second cut,
The first straight portion is formed in a straight line between the first end (m11, m21) which is the other end of the first straight portion and the first contact point, and the first curved portion is defined as the first contact point. A curved line is formed between the second contact points, a second straight line portion is formed linearly between the second contact point and the third contact point, and a second curved line portion is formed between the third contact point and the fourth contact point. It is formed in a curved line in between, and the extending part is formed in a straight line between the third contact point and the second end part (m15, m25) which is the end opposite to the fourth contact point of the extending part,
The stretched part is formed in the zipper opening direction,
The first end is located on a virtual straight line (10E, 20E) passing through the fourth contact point and the second end in a virtual straight line in the zipper opening direction,
The first straight portion is formed to be inclined with respect to the direction of the imaginary straight line so that the first end portion is located on the front side in the zipper opening direction from the first contact point,
The first curved portion is formed in a bending direction that bends to the zipper opening direction side in the bending direction with respect to the direction of the first linear portion from the first contact point,
In the second straight line portion, the second contact point is located in front of the third contact point in the zipper opening direction, and the length from the second contact point to the virtual straight line is longer than the length from the third contact point to the virtual straight line. Is formed so as to be inclined with respect to the direction of the virtual straight line,
The second curved portion is formed in a bending direction opposite to the bending direction of the first curved portion from the third contact point;
The first contact point is located on the front side in the zipper opening direction with respect to the second contact point, the third contact point is located on the front side in the zipper opening direction with respect to the fourth contact point,
The second cut line is formed symmetrically with respect to the center line between the first cut line and the first cut and the second cut corresponding to each other in the plurality of first cuts and the plurality of second cuts are A paper box characterized in that the first cut and the second cut are formed symmetrically with respect to each other so that the first cut and the second cut face each other in a state where the one contact point is outside the first end. Zipper for. A cut line for a paper box used for a paper box formed by a sheet-like paper blank,
The opening direction of the cut line is linear,
The cut line for the paper box is formed by arranging a plurality of cuts (10, 20) in a row at intervals,
The depth of cut
A first curve portion (14, 24) formed from a first straight portion (12, 22), a first contact point (m12, m22) which is one end of the first straight portion, and a first curve portion The second straight line part (15, 25) formed from the second contact point (m13-1, m23-1) which is the end opposite to the first contact point, and the second contact of the second straight line part The second curve portion (16, 26) formed from the third contact point (m13-2, m23-2) that is the end opposite to the point is opposite to the third contact point of the second curve portion. It has an extension part (18, 28) formed from the fourth contact point (m14, m24) which is the end part on the side,
In each of the first cut and the second cut,
The first straight portion is formed in a straight line between the first end (m11, m21) which is the other end of the first straight portion and the first contact point, and the first curved portion is defined as the first contact point. A curved line is formed between the second contact points, a second straight line portion is formed linearly between the second contact point and the third contact point, and a second curved line portion is formed between the third contact point and the fourth contact point. It is formed in a curved line in between, and the extending part is formed in a straight line between the third contact point and the second end part (m15, m25) which is the end opposite to the fourth contact point of the extending part,
The stretched part is formed in the direction of opening the cut line,
The first end is located on a virtual straight line (10E, 20E) passing through the fourth contact point and the second end in a virtual straight line in the opening direction of the cut line,
The first straight portion is formed so as to be inclined with respect to the direction of the imaginary straight line so that the first end portion is located on the front side in the cut line opening direction from the first contact point,
The first curved portion is formed in a bending direction that bends toward the cut line opening direction side in the bending direction with respect to the direction of the first linear portion from the first contact point,
In the second straight line portion, the second contact point is located in front of the third contact point in the opening direction of the cut line, and the length from the second contact point to the virtual straight line is the length from the third contact point to the virtual straight line. Longer than the length of the imaginary straight line,
The second curved portion is formed in a bending direction opposite to the bending direction of the first curved portion from the third contact point;
The first contact point is located on the front side in the cut line opening direction with respect to the second contact point, and the third contact point is located on the front side in the cut line opening direction with respect to the fourth contact point. Box cut line. A zipper for a paper box used for a paper box formed by a sheet-like paper blank,
Having a first cut line and a second cut line;
The zipper opening direction is curved,
The first cut line is formed by arranging a plurality of first cuts (10) in a row at intervals,
The second cut line is formed by arranging a plurality of second cuts (20) in a row at intervals,
Each of the first cut and the second cut
A first curve portion (14, 24) formed from a first straight portion (12, 22), a first contact point (m12, m22) which is one end of the first straight portion, and a first curve portion The second straight line part (15, 25) formed from the second contact point (m13-1, m23-1) which is the end opposite to the first contact point, and the second contact of the second straight line part The second curve portion (16, 26) formed from the third contact point (m13-2, m23-2) that is the end opposite to the point is opposite to the third contact point of the second curve portion. It has an extension part (18, 28) formed from the fourth contact point (m14, m24) which is the end part on the side,
In each of the first cut and the second cut,
The first straight portion is formed in a straight line between the first end (m11, m21) which is the other end of the first straight portion and the first contact point, and the first curved portion is defined as the first contact point. A curved line is formed between the second contact points, a second straight line portion is formed linearly between the second contact point and the third contact point, and a second curved line portion is formed between the third contact point and the fourth contact point. It is formed in a curved line in between, and the extending part is formed in a straight line between the third contact point and the second end part (m15, m25) which is the end opposite to the fourth contact point of the extending part,
The stretched part is formed in the zipper opening direction,
The first end is located on a virtual curve (11E, 21E) passing through the fourth contact point and the second end in a virtual curve in the zipper opening direction,
The first straight line portion is formed so as to be inclined with respect to the tangent lines (15E, 25E) of the virtual curve at the first end portion so that the first end portion is located in front of the first contact point in the zipper opening direction. ,
The first curved portion is formed in a bending direction that bends to the zipper opening direction side in the bending direction with respect to the direction of the first linear portion from the first contact point,
In the second straight line portion, the second contact point is positioned in front of the third contact point in the zipper opening direction, and the length from the second contact point to the virtual curve is longer than the length from the third contact point to the virtual curve. Also formed long,
The second curved portion is formed in a bending direction opposite to the bending direction of the first curved portion from the third contact point;
The first contact point is located on the front side in the zipper opening direction with respect to the second contact point, the third contact point is located on the front side in the zipper opening direction with respect to the fourth contact point,
The first cut and the second cut corresponding to each other in the plurality of first cuts and the plurality of second cuts are opposed to each other in a state where the first contact point is outside the first end portion. Zipper for paper box. A cut line for a paper box used for a paper box formed by a sheet-like paper blank,
The opening direction of the cut line is curved,
The score line for the paper box is formed by arranging a plurality of cuts (10, 20) in a row at intervals,
The depth of cut
A first curve portion (14, 24) formed from a first straight portion (12, 22), a first contact point (m12, m22) which is one end of the first straight portion, and a first curve portion The second straight line part (15, 25) formed from the second contact point (m13-1, m23-1) which is the end opposite to the first contact point, and the second contact of the second straight line part The second curve portion (16, 26) formed from the third contact point (m13-2, m23-2) that is the end opposite to the point is opposite to the third contact point of the second curve portion. It has an extension part (18, 28) formed from the fourth contact point (m14, m24) which is the end part on the side,
The first straight portion is formed in a straight line between the first end (m11, m21) which is the other end of the first straight portion and the first contact point, and the first curved portion is defined as the first contact point. A curved line is formed between the second contact points, a second straight line portion is formed linearly between the second contact point and the third contact point, and a second curved line portion is formed between the third contact point and the fourth contact point. It is formed in a curved line in between, and the extending part is formed in a straight line between the third contact point and the second end part (m15, m25) which is the end opposite to the fourth contact point of the extending part,
The stretched part is formed in the direction of opening the cut line,
The first end is located on a virtual curve (11E, 21E) passing through the fourth contact point and the second end in a virtual curve in the opening direction of the cut line,
The first straight line portion is formed so as to be inclined with respect to the tangent lines (15E, 25E) of the virtual curve at the first end portion so that the first end portion is located on the front side in the opening direction of the cut line from the first contact point. And
The first curved portion is formed in a bending direction that bends toward the cut line opening direction side in the bending direction with respect to the direction of the first linear portion from the first contact point,
In the second straight line portion, the second contact point is located in front of the third contact point in the opening direction of the cut line, and the length from the second contact point to the virtual curve is the length from the third contact point to the virtual curve. Longer than that,
The second curved portion is formed in a bending direction opposite to the bending direction of the first curved portion from the third contact point;
The first contact point is located on the front side in the cut line opening direction with respect to the second contact point, and the third contact point is located on the front side in the cut line opening direction with respect to the fourth contact point. Box cut line.

Images