JP7422509B2 - carton - Google Patents

Description

The present invention relates to cartons.

BACKGROUND ART Conventionally, a carton is known in which the carton is opened in a predetermined opening direction using tear lines formed on the carton (for example, see Patent Document 1).

The carton described in Patent Document 1 is formed with a tear line including a line of cuts in which a plurality of cuts are arranged in a direction oblique to the opening direction from the opening tab. When opening the carton, by pulling the tab in the opening direction, the opening (opening surface) is cut along the tear line.

JP2007-099310A

However, in the conventional carton as described above, the next cut is provided on the downstream side in the opening direction from the extension line of the cut, so the length in the opening direction of the area where the row of cuts in the inclined direction is provided is If it is too short, the width of the opening surface formed by the tear line will become narrower, and the opening of the carton will become smaller. On the other hand, if the inclination of the line of cuts with respect to the unsealing direction is increased, the force in the unsealing direction becomes difficult to be transmitted in the inclination direction and does not connect to the next cut, causing a problem that the unsealing surface part cannot be cut along the tear line.

An object of the present invention is to provide a carton in which the opening can be made larger even when the length in the opening direction of the region provided with the row of cuts in the inclined direction is short, and the opening surface can be cut along the tear line. It's about doing.

The carton of the present invention includes a cylindrical body, a bottom portion that closes one end of the body in the axial direction, a tear line for opening the carton, and the carton that can be opened in the unsealing direction by the tear line. an opening surface forming an opening at the other end in the axial direction of the part, the opening surface section comprising a tab provided at an end, and the tear line gradually separating from the tab in the opening direction. a cut line in which a plurality of cuts are arranged in a row in the direction of inclination, and the cut line passes through an intersection with an extension line of a cut located on the tab side from the cut line, It is characterized by comprising a first line part extending upstream and a second line part extending in the oblique direction from the first line part.

According to the present invention, the cut in the inclined direction includes the first line portion extending upstream in the opening direction from the intersection with the extension line of the cut located on the tab side of the cut. Therefore, each time the tear line moves from one cut to the next, the tear line can be returned to the upstream side in the opening direction at the first line, so that the length in the opening direction of the area where the row of cuts in the inclined direction is provided is reduced. Even if it is short, the width of the opening surface can be made wider, and the opening of the carton can be made larger.
Further, since the first line portion intersects with the extension line of the cut located on the tab side of the cut, the cut can be connected to the next cut, and the opening surface portion can be cut along the tear line.

In the carton of the present invention, the first line part is provided at a position overlapping with the cut on the tab side when seen in the opening direction, and the lead-in line part extends in the inclined direction, and the lead-in line part extends from the lead-in line part to the opening line part. It is preferable to include a folded line part that is folded back on the upstream side of the direction and connected to the second line part.

According to the present invention, since the lead-in line portion is provided at a position that overlaps with the cut on the tab side when viewed in the opening direction, even if the tear line breaks from the end of the cut in the opening direction, the lead-in line of the next cut It can be connected to the section. Also. The lead-in line part extends in an inclined direction, and the fold-back line part is folded back from the lead-in line part to the upstream side in the opening direction, so that the cut on the tab side can be smoothly connected to the fold-back line part via the lead-in line part. This allows the opening surface portion to be cut more reliably along the tear line.

In the carton of the present invention, the cut is provided at a position that overlaps with the cut on the opposite side of the tab when viewed in the opening direction, and a third line portion is folded back from the second line portion toward the downstream side in the opening direction. It is preferable to have the following.

According to the present invention, the third line part is provided at a position overlapping the cut on the opposite side of the tab when viewed in the opening direction, and the third line part is folded back from the second line part to the downstream side in the opening direction. Therefore, the third line can be smoothly connected to the next cut on the opposite side of the tab. Therefore, the unsealing surface portion can be more reliably cut along the tear line.

FIG. 1 is a perspective view of a carton according to an embodiment of the present invention. An exploded view of the carton. A partially enlarged view of FIG. 2. The perspective view of the carton concerning the modification of the present invention. FIG. 7 is a partially enlarged view of a developed view of a carton according to a modification of the present invention.

Hereinafter, one embodiment of the present invention will be described based on the drawings.
Note that when directions are expressed in the following description, the state in which the carton 1 is placed as shown in FIG. 1 is used as a reference. Further, the width direction refers to a direction perpendicular to the axial direction of the body 2 at each side surface of the carton 1.

[overall structure]
FIG. 1 is a perspective view showing a carton 1 according to this embodiment. FIG. 2 is a developed view of the carton 1 (a plan view of a carton forming panel (also referred to as a carton blank) 1A).
In FIG. 1, a carton 1 is a so-called open-top box, and foods such as cheese and butter are stored inside. As shown in FIG. 2, the carton 1 is assembled from carton-forming panels 1A made of paperboard material.

1 and 2, the carton 1 includes a body 2, a bottom 3, a top 4, an opening surface 5, and a tear line 6.

The body portion 2 has a substantially rectangular cylindrical shape when viewed from above. The body portion 2 includes a first inner side surface portion 21 (see FIG. 2), a first outer side surface portion 22, a second side surface portion 23, a third inner side surface portion 24, and a third outer side surface portion 25.

The first inner side surface portion 21 and the first outer side surface portion 22 are side surface portions on one long side of the body portion 2, and are arranged to overlap with each other.
The inner first side surface portion 21 includes an insertion portion 21A (see FIG. 2) into which a later-described tab 51 of the unsealing surface portion 5 is inserted. The insertion part 21A has a first cutting line 21B cut in a curved shape convex upward toward the top part 4, and a first cutting line 21B cut in a straight line from the apex of the first cutting line 21B toward the top part 4. 2 cutting lines 21C.
The outer first side surface portion 22 is arranged outside the inner first side surface portion 21 , and a region closer to the bottom surface portion 3 than the tear line 6 is attached to the inner first side surface portion 21 . The first outer side surface portion 22 includes a flap 22A (see FIG. 2) and a cutout portion 22B.
The flaps 22A are provided at both ends of the first outer side surface portion 22 in the width direction and extend in the width direction.
The cutout portions 22B are provided on both sides of the tab 51 in the width direction of the first outer side surface portion 22, and are cut out at the edge of the first outer side surface portion 22 on the bottom surface portion 3 side.

The second side surface portion 23 is a side surface portion on the other long side of the body portion 2 and faces the inner first side surface portion 21 . The second side surface portion 23 includes flaps 23A (see FIG. 2) extending in the width direction at both end portions in the width direction.

The inner third side surface portion 24 and the outer third side surface portion 25 are side surface portions on the shorter side of the body portion 2, and are located on both sides in a direction perpendicular to the opposing direction of the inner first side surface portion 21 and the second side surface portion 23. are placed on top of each other.
The third inner side surface portion 24 includes a flap 24A (see FIG. 2) provided at a position opposite to the bottom surface portion 3.
The third outer side surface portion 25 is disposed outside the third inner side surface portion 24 and is attached to the third inner side surface portion 24 .

The bottom portion 3 closes one end of the body portion 2 in the axial direction. The bottom surface portion 3 is connected to the first inner side surface portion 21 via the horizontal fold line 31, to the second side surface portion 23 via the horizontal fold line 32, and to the third inner side surface portion 24 via the horizontal fold line 33. .
The horizontal fold line 31 is a so-called perforation in which a plurality of cuts form a row.

The top surface portion 4 closes the other end of the body portion 2 in the axial direction. The top surface section 4 is connected to the first outer side surface section 22 via the horizontal fold line 41, to the second side surface section 23 via the horizontal fold line 42, and to the third outer side surface section 25 via the tear line 6. has been done.
The horizontal fold line 41 is a so-called perforation line in which a plurality of cuts form a row.

The opening surface portion 5 is provided from the outer first side surface portion 22 to the top surface portion 4. The unsealing surface part 5 is provided so as to be unsealable by a tear line 6 in a first unsealing direction D1 from the bottom part 3 toward the top surface part 4 and in a second unsealing direction D2 from the outer first side surface part 22 to the second side surface part 23. , an opening for taking out food is formed at the other axial end of the body 2. The unsealing surface portion 5 includes a tab 51, a widening portion 52, and an opening forming portion 53.
The tab 51 is provided at the tip of the first outer side surface portion 22 of the unsealing surface portion 5 .
The expanded portion 52 is formed of a part of the first outer side surface portion 22 and is connected to the tab 51 . The expanding portion 52 is formed so as to gradually expand from the tab 51 toward the first opening direction D1, that is, so that the dimension in the width direction gradually increases toward the first opening direction D1.
The opening forming part 53 is constituted by the top surface part 4 and is connected to the expanded part 52 via the horizontal fold line 41 and to the second side surface part 23 via the horizontal fold line 42.

The tear line 6 is a cutting line for opening the carton 1, and is provided from the first outer side surface portion 22 to the top surface portion 4, as shown in FIG. The tear line 6 includes a first row of cuts 6A and a second row of cuts 6B.

The first cut row 6A is provided on the first outer side surface portion 22 and extends from the tab 51 to both ends of the first outer side surface portion 22 in the width direction. In the first cut row 6A, first cuts 61 and second cuts 62 are sequentially arranged in a first inclination direction D3 that gradually separates from the tab 51 with respect to the first opening direction D1. Further, in the first cut row 6A, following the second cut 62, a plurality of third cuts 63 and fourth cuts 64 are sequentially formed in a second inclined direction D4 that gradually separates from the tab 51 with respect to the first opening direction D1. lining up. Note that the second inclination direction D4 is more inclined than the first inclination direction D3 with respect to the first opening direction D1. Further, the inclination angle of the first inclination direction D3 and the second inclination direction D4 with respect to the first opening direction D1 is preferably in the range of 70 degrees or more and 80 degrees or less (the inclination angle with respect to the horizontal fold line 31 is 10 degrees or more and 20 degrees or less). .

The second cut row 6B is provided on the boundary line between the outer third side surface portion 25 and the top surface portion 4, and includes a fifth cut 65, a sixth cut 66, and a plurality of seventh cuts 67 toward the second opening direction D2. are lined up in order.

In FIG. 3, the first cut 61 includes an introduction part 61A, a first slope part 61B, and a second slope part 61C.
The introduction portion 61A extends from a position closer to the tab 51 than an extension line ET obtained by extending the side edge 51A in the width direction of the tab 51 so as to be folded back toward the top surface portion 4 side in the first inclination direction D3. has been done.
The first inclined portion 61B is a straight line extending in the first inclined direction D3 from the introduction portion 61A. The angle of inclination of the first inclined portion 61B with respect to the extension line ET (first opening direction D1) is preferably in the range of 70 degrees or more and 80 degrees or less.
The second inclined portion 61C is folded back from the first inclined portion 61B toward the downstream side in the first opening direction D1.

The second cut 62 includes a width direction portion 62A, a first slope portion 62B, and a second slope portion 62C.
The width direction portion 62A is provided at a position overlapping with the first cut 61 when viewed in the first opening direction D1, passes through the intersection with the extension line E1 obtained by extending the first cut 61, and extends in the width direction of the outer first side surface portion 22. It has been extended.
The first inclined portion 62B is a straight line extending from the width direction portion 62A in the first inclined direction D3.
The second inclined portion 62C is folded back from the first inclined portion 62B toward the downstream side in the first opening direction D1.

The third cut 63 includes a first line portion 63A, a second line portion 63B, and a third line portion 63C.

The first line portion 63A passes through an intersection with an extension line E2 that is an extension of the second cut 62 or an extension line E3 that is an extension of the third cut 63 on the tab 51 side, and is on the upstream side of the intersection in the first opening direction D1. It has been extended to The first line portion 63A includes a lead-in line portion 631 and a folded line portion 632.
The lead-in line portion 631 is provided at a position overlapping with the second cut 62 or the third cut 63 on the tab 51 side when viewed in the first opening direction D1, and is a straight line extending in the first inclined direction D3.
The folded line portion 632 is a straight line that is folded back from the introduction line portion 631 to the upstream side in the first opening direction D1 and is connected to the second line portion 63B.

The second line portion 63B is a straight line extending in the first inclination direction D3 from the first line portion 63A.

The third line portion 63C is provided at a position overlapping the third cut 63 on the opposite side to the tab 51 when viewed in the first opening direction D1, and is folded back from the second line portion 63B toward the downstream side in the first opening direction D1. There is.

The fourth cut 64 includes a widthwise portion 64A and an inclined portion 64B.
The width direction portion 64A is provided at a position overlapping with the third cut 63 when viewed in the first opening direction D1, passes through the intersection with the extension line E4 obtained by extending the third cut 63, and extends in the width direction of the outer first side surface portion 22. It has been extended.
The inclined portion 64B extends from the width direction portion 64A toward the fifth cut 65.

The fifth cut 65 includes an inclined portion 65A and a straight portion 65B.
The inclined portion 65A is provided at a corner of the first outer side surface portion 22 on the horizontal fold line 41 side, and is a straight line inclined toward the fourth cut 64.
The straight portion 65B is a straight line extending from the inclined portion 65A to the boundary line between the outer third side surface portion 25 and the top surface portion 4.

The sixth cut 66 is provided on an extension line of the linear portion 65B of the fifth cut 65, and is a straight line extending on the boundary line between the outer third side surface portion 25 and the top surface portion 4.

The seventh cut 67 includes an inclined portion 67A and a straight portion 67B.
The inclined portion 67A is provided at a position on the outer first side surface portion 22 side of the seventh cut 67, and is a straight line inclined toward the inner side of the top surface portion 4.
The straight portion 67B is a straight line extending from the inclined portion 67A to the boundary line between the outer third side surface portion 25 and the top surface portion 4.

[Opening and resealing the carton]
In FIG. 1, when opening the carton 1, the user grasps and pulls up the tab 51 while pulling the tab 51 in the first opening direction D1. As a result, the expanded portion 52 of the unsealing surface portion 5 is pulled in the first opening direction D1 by the tab 51, and the expanded portion 52 is cut along the first line of cuts 6A. Here, as shown in FIG. 3, the folding line part 632 of the third cut 63 is closer to the first opening than the intersection with the extension line E2 of the second cut 62 or the extension line E3 of the third cut 63 on the tab 51 side. Since it is folded back and extended upstream in the direction D1, the tear line 6 is returned to the upstream side in the first opening direction D1 every time it moves from one third cut 63 to the next third cut 63. . Therefore, even if the length of the first outer side surface portion 22 in the first opening direction D1 is short, the width of the expanded portion 52 of the opening surface portion 5 can be increased.

In FIG. 1, after the expanded portion 52 is cut along the first line of cuts 6A, the tab 51 is pulled in the second opening direction D2. As a result, the opening forming portion 53 of the unsealing surface portion 5 is cut along the second line of cuts 6B, and an opening for taking out the food is formed.

When resealing the carton 1, the opening surface portion 5 is returned to the position before opening, and the tab 51 is inserted into the insertion portion 21A (see FIG. 2). As a result, the tab 51 is locked to the insertion portion 21A, and the unsealing surface portion 5 can be maintained in a closed state.

According to the embodiment described above, the third cut 63 is the intersection point with the extension line E2 of the second cut 62 or the extension line E3 of the third cut 63 located on the tab 51 side than the third cut 63. It is provided with a first line portion 63A extending upstream in the first opening direction D1. Therefore, each time the tear line 6 moves from the third cut 63 to the next third cut 63, the tear line 6 can be returned to the upstream side in the first opening direction D1 at the first line portion 63A. Even when the length of the provided area in the first opening direction D1 is short, the width of the opening surface portion 5 can be made wide, and the opening of the carton 1 can be made large.
Further, since the first line portion 63A intersects with the extension line E2 of the second cut 62 or the extension line E3 of the third cut 63 located on the tab 51 side than the third cut 63, the second cut 62 or the third cut The cut 63 can be connected to the next third cut 63, and the opening surface portion 5 can be cut along the tear line 6.

In addition, since the lead-in line portion 631 is provided at a position overlapping with the second cut 62 or the third cut 63 on the tab 51 side when viewed in the first opening direction D1, the tear line 6 is inserted into the second cut 62 or the third cut 63 on the tab 51 side. Even if it is broken from the end of 63 in the first opening direction D1, it can be connected to the lead-in line portion 631 of the next third cut 63. Also. Since the lead-in line part 631 extends in the second inclination direction D4, and the folded line part 632 is folded back from the lead-in line part 631 toward the upstream side in the first opening direction D1, the second cut 62 or the tab 51 side The third cut 63 can be smoothly connected to the folding line part 632 via the lead-in line part 631, and the unsealing surface part 5 can be cut along the tear line 6 more reliably.

Further, a third line portion 63C is provided at a position overlapping with the second cut 62 or the third cut 63 on the opposite side of the tab 51 when viewed in the first opening direction D1, and the third line portion 63C is a second line portion. Since it is folded back from 63B to the downstream side in the first opening direction D1, the third line portion 63C can be smoothly connected to the next third cut 63 on the opposite side of the tab 51. Therefore, the unsealing surface portion 5 can be cut along the tear line 6 more reliably.

[Modified example]
It should be noted that the present invention is not limited to the above-described embodiments, and the present invention includes modifications, improvements, etc. within a range that can achieve the purpose of the present invention.
For example, the carton 1 is suitable for food use, but is not limited thereto.

The body 2 is not limited to a cylindrical shape that is approximately rectangular in plan view, but may be, for example, a cylindrical shape that is approximately triangular in plan view, a quadrilateral other than a rectangle such as a square or a rhombus, a polygon with five or more sides, or a cylindrical shape that is approximately rectangular in plan view. It may be cylindrical, such as a perfect circle, an ellipse, or an oval shape.

The first inner side surface portion 21 may include a flap extending on one or both sides in the width direction. In this case, the outer first side surface portion 22 does not need to include the flap 22A.
The first cutting line 21B of the insertion portion 21A may be cut into a triangular, rectangular, polygonal, or other folded line shape that is convex upward toward the top surface portion 4.
The second cutting line 21C of the insertion part 21A may extend from a position other than the apex on the first cutting line 21B, or may extend from the apex of the first cutting line 21B or from one point other than the apex. Alternatively, a plurality of them may be extended from a plurality of different positions on the first cutting line 21B.

The inner third side surface portion 24 or the outer third side surface portion 25 may include a flap extending on one side or both sides in the width direction. In this case, the first inner side surface portion 21 and the first outer side surface portion 22 do not need to have flaps on one side or both sides in the width direction.

The horizontal fold lines 31, 41 are not limited to being composed of perforations; for example, the horizontal fold lines 31, 41 may be composed of partially altered parts, or the horizontal fold lines 31, 41 may be formed by thinning the transverse fold lines 31, 41. It may be composed of a thin walled portion. In this case, the altered portions and thin-walled portions may be provided so as to be arranged intermittently in a row like a broken line, or may be provided in a single continuous line.

The opening surface portion 5 and the tear line 6 do not need to be provided from the outer first side surface portion 22 to the top surface portion 4, and may be provided only on the top surface portion 4, as shown in FIG. In this case, the second cut line 6B may include a seventh cut 67 instead of the fifth cut 65, or may not include the sixth cut 66. Moreover, the insertion part 21A may not be provided.
The tip edge of the tab 51 is not limited to the one in the embodiment, and may have a curved shape such as a U-shape, a V-shape, an arc shape, or a polygonal shape, for example.
The shape of the opening forming portion 53 is not limited to that of the embodiment, and may be, for example, a substantially triangular shape in plan view, a quadrilateral such as a square or a parallelogram, or a circular arc. (It may be a shape in which a part of the circle is cut by a straight line).

The first cut row 6A does not need to include the first cut 61 and the second cut 62. In this case, the third cuts 63 may be provided in parallel in the second inclination direction D4 from the extension line of the side edge 51A of the tab 51.
The first cut row 6A does not need to include the second cut 62. In this case, the third cut 63 may be provided next to the first cut 61.
The first cut row 6A may include a third cut 63 instead of the fourth cut 64.

The second cut row 6B may be provided closer to the top surface 4 than the boundary line between the third outer side surface 25 and the top surface 4, that is, in the inner region of the top surface 4, or may be provided on the inner side of the third outer side surface 25 and the top surface 4. The fifth cut 65 , the sixth cut 66 , and the seventh cut 67 may be arranged in parallel on a curve such as an arc or a waveform in the boundary line with the top surface portion 4 or in the inner region of the top surface portion 4 .

The first cut 61 may have a first inclined portion 61B extending in the second inclined direction D4, or may not include the second inclined portion 61C.
The introduction portion 61A does not need to extend from a position closer to the tab 51 than the extension line ET, and may extend from a position on the extension line ET, for example.
In the second cut 62, the first slope portion 62B may extend in the second slope direction D4, or the second slope portion 62C may not be provided.
The third cut 63 may have a second line portion 63B extending in the second inclination direction D4, or may not include the third line portion 63C.
As shown in FIG. 5, the third cut 63 may not include the lead-in line portion 631 and the third line portion 63C, or may include either the lead-in line portion 631 or the third line portion 63C. You don't have to.
The lead-in line portion 631 may have a curved shape or may extend in the second inclined direction D4.
The folding line portion 632 may have a curved shape.
The fourth cut 64 may have the same shape as the third cut 63, and in this case, it does not need to include the third line portion 63C.
The sixth cut 66 may be formed integrally with the fifth cut 65 by extending the straight portion 65B of the fifth cut 65, or may not be formed.

The second opening direction D2 may not be a direction perpendicular to the horizontal fold lines 41 and 42, but may be a direction intersecting the horizontal fold lines 41 and 42.
The first inclination direction D3 may be the same direction as the second inclination direction D4.

DESCRIPTION OF SYMBOLS 1...Carton, 2...Body part, 3...Bottom part, 5...Opening surface part, 6...Tear line, 6A...1st cut row (cut row), 51...Tab, 63...3rd cut (cut), 63A... First line part, 63B... Second line part, 63C... Third line part, 631... Leading line part, 632... Folding line part, D1... First opening direction (opening direction), D2... Second opening direction (unpacking direction). direction), D3...first inclination direction (inclination direction), D4...second inclination direction (inclination direction).

Claims (4)

a cylindrical body;
a bottom portion that closes one end in the axial direction of the trunk;
A tear line for opening,
an unsealing surface portion that is provided to be unsealable by the tear line and that forms an opening at the other end in the axial direction of the body portion;
The opening surface portion includes a tab provided at an end, and the tab is pulled in the opening direction to open the opening in the opening direction, and the opening is formed in the opening direction.
The tear line includes a cut row in which a plurality of same-shaped cuts are arranged in a row in an inclined direction that gradually separates from the tab with respect to the opening direction,
The cut is
a first line portion passing through an intersection with an extension line extending from a cut located closer to the tab than the cut;
a second line portion extending from the first line portion in the oblique direction ;
The carton is characterized in that the first line part is formed so as to gradually move upstream in the opening direction from the intersection with the extension line toward the second line part . The first line portion is
an introduction line portion provided at a position overlapping with the cut on the tab side when viewed in the opening direction, and extending in the inclined direction;
The carton according to claim 1, further comprising a folding line part that is folded back from the introduction line part toward the upstream side in the opening direction and connected to the second line part. The cut is provided at a position overlapping the cut on the opposite side of the tab when viewed in the opening direction, and includes a third line portion folded back from the second line portion toward the downstream side in the opening direction. The carton according to claim 1 or claim 2, characterized in that: The carton according to any one of claims 1 to 3, wherein the carton is for food.

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