JP7224900B2 - packaging box - Google Patents

Description

Application of Patent Act Article 30, Paragraph 2 From July 3, 2018 to November 27, 2018, a box making test and a transportation test were conducted.

TECHNICAL FIELD The present invention relates to a packaging box suitable for packaging products and the like.

2. Description of the Related Art Conventionally, there has been known a packaging box having an opening piece cut in the height direction of the packaging box to form an opening in the front side of the packaging box in order to improve the ease of taking out contents such as products. (See Patent Document 1, for example). This opening piece is a portion of the front side defined by a set of easy-to-open lines extending in the height direction of the packaging box. A user who opens the packaging box holds the upper portion of the opening piece and pulls it toward the user, tearing the opening piece along the easy-to-open line to form an opening that serves as an opening for taking out the contents.

Japanese Unexamined Patent Application Publication No. 2011-93601

In the technique described in Patent Document 1, when the user pulls the upper portion of the opening piece forward to form the opening, the other portion of the front side adjacent to the opening piece also moves forward. Because of the movement, the tear piece cannot be torn along the easy tear line. Therefore, when tearing the opening piece, the user had to hold the upper part of the opening piece with one hand and press the front side part adjacent to the opening piece with the other hand to perform the opening operation. . That is, one hand holds the upper side of the opening piece and pulls it forward, while the other hand holds one of the front side portions adjacent to both sides of the opening piece, and the held front side portion becomes the opening. I had to hold it down so that it wouldn't move toward me because of a piece. However, since the other side of the front side that is not pressed by the other hand moves forward together with the opening piece, it is still difficult to tear the opening piece along the easy-to-open line, making the opening operation difficult. was there.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a packaging box that can be easily opened.

In order to achieve the above object, the present invention provides the following means.
The packaging box of the present invention is one of a plurality of side surfaces connected in a rectangular tubular shape having at least one opening, and is a set of first openings extending in a direction intersecting the upper end of the packaging box and arranged at predetermined intervals. A first side portion having one easy-open line formed thereon, and a second easy-open line extending from the upper end and connecting the first set of easy-open lines are formed, and are bent at the upper end. and a lid flap that closes at least a portion of the opening.

In the above invention, the lid flap is formed with a third easy-open line extending from the second easy-open line toward the edge of the lid flap opposite to the upper end. It is preferably characterized.

In the above invention, the second easy-open lines include a set of fourth easy-open lines extending in the direction in which the first easy-open lines extend, and the upper ends of the set of fourth easy-open lines. The third easy-open line is any of the points where the set of the fourth easy-open line and the fifth easy-open line are connected. Preferably, it extends from a separation starting portion near one of the ends toward the edge.

In the above invention, the third easy-open line separates from the separation start portion in a direction intersecting the direction in which the first easy-open line extends and away from the area partitioned by the second easy-open line. It preferably extends in a direction and further extends toward the edge.

In the above invention, the finger of the user who opens the packaging box is inserted into and removed from the lid flap portion of the opening section defined by the pair of the first easy-open line and the second easy-open line. Preferably, it is characterized in that an insertable part is provided to enable the insertion of the device.

In the above invention, a pair of second side surface portions, which are part of the plurality of side surface portions and are adjacent to both sides of the first side surface portion, are connected to at least the lower end of the first side surface portion, From the bottom surface portion forming the bottom surface on the side opposite to the opening, and the one of the first easy-to-open lines on the side of the one of the second side portions toward the one of the second side portions. An extending sixth easy-open line, and a seventh easy-open line extending from the other first easy-open line on the side of the other second side surface toward the other second side surface. At least one of the sixth easy-open line and the seventh easy-open line is provided on the boundary between the first side surface portion and the bottom surface portion, or on the boundary side of the bottom surface portion. It is preferably characterized by being characterized by
In the above invention, the bottom surface portion extends from the lower end of the first side surface portion and has a plurality of bottom side flaps including at least a bottom flap that is bent at the lower end to close at least part of the other opening. At least one of the sixth easy-open line and the seventh easy-open line is on the boundary between the first side surface portion and the bottom flap, or on the boundary side of the bottom flap characterized by being provided in

In the above invention, the plurality of side portions include the first side portion, a set of second side portions adjacent to both sides of the first side portion, and the set of second side portions. sandwiched between and connected in a square tube shape composed of a third side portion facing the first side portion, the upper end of the second side portion extending, the second side portion an outer lid flap that is bent at an upper end to cover at least a portion of the opening; and an opening that extends from the lower end of the second side surface and is bent at the lower end of the second side surface to cover at least a portion of the opening and an outer bottom flap covering at least a portion of the second side portion, the outer lid flap, or the outer bottom flap, on at least one of the first side portion and the second side portion It is preferable that a bending line extending substantially parallel to the boundary between the two is formed.

Advantageous Effects of Invention According to the packaging box of the present invention, it is possible to provide a packaging box in which the unsealable portion can be easily torn along the easy-to-open line and an opening for taking out the contents can be formed tolerably.

It is an expanded view explaining the packaging box concerning one embodiment of the present invention. Fig.2 (a) is a perspective view explaining the packaging box which concerns on one Embodiment of this invention. FIG.2(b) is a figure explaining the aspect of sectional drawing of the sheet material of the packaging box of this invention. It is a figure explaining the opening method of the packaging box of FIG. It is a figure explaining the opening method of the packaging box of FIG. It is a figure explaining the opening method of the packaging box of FIG. It is a figure explaining the opening method of the packaging box of FIG. It is a figure explaining the state where the unsealed packaging box was crushed. It is a figure explaining the method of folding the crushed packaging box. It is a figure explaining the method of folding the crushed packaging box. It is a figure explaining the method of folding the crushed packaging box. FIG. 11(a) is an enlarged view of the unsealable portion explaining the fracture lines that divide the unsealable portion. FIG. 11(b) is an enlarged view (schematic view) explaining the break line. FIG. 12(a) is an enlarged view of the unsealable portion explaining the break lines that divide the unsealable portion. FIG.12(b) is an enlarged view (schematic view) explaining a break line. FIG. 13(a) is an enlarged view of the unsealable portion explaining the break lines that divide the unsealable portion. FIG. 13(b) is an enlarged view of the unsealable portion explaining the broken line that defines the unsealable portion.

A packaging box 10 according to an embodiment of the present invention will be described mainly with reference to FIGS. 1 to 13. FIG. In this embodiment, the packaging box 10 is applied to an example that is used for packaging and transporting products. In the following description, front and rear, left and right, and up and down directions are the directions shown in the drawings unless otherwise specified. Also, the side of the packaging box 10 containing the contents is referred to as the inner side, and the opposite side is referred to as the outer side.

1. Description of Configuration of Packaging Box First, the configuration of the packaging box 10 will be described mainly with reference to FIGS. The packaging box 10 according to this embodiment is a substantially straight packaging box mainly shown in FIG. The packaging box 10 is assembled by folding the sheet material 1 processed into a predetermined shape shown in FIG. 1 at predetermined locations.

In the present embodiment, the sheet material 1 is applied to an example in which a corrugated cardboard sheet is formed into a predetermined shape, and the following description will be made. The sheet member 1 may be a ball member or another known sheet member formed thereon. In this embodiment, the sheet material 1 is arranged such that the paper width direction of the corrugated cardboard sheet (the direction in which the core of the corrugated cardboard sheet extends) is the vertical direction of the packaging box 10, that is, the direction from the bottom side of the packaging box 10 to the lid side. The following description is applied to an example in which is formed. However, the paper width direction of the corrugated cardboard sheet may be different from the above.

The packaging box 10 mainly includes a main body 11, a pair of outer lid flaps 21, 41, a pair of inner lid flaps 31, 51, a pair of outer bottom flaps 22, 42, and a pair of inner bottom flaps 32, 52. It is

The main body part 11 constitutes the rectangular tubular side surface of the packaging box 10 . One opening of the main body 11 serves as an opening on the upper side (cover side) of the packaging box 10 , and the other opening serves as an opening on the lower side (bottom side) of the packaging box 10 . The body portion 11 is mainly provided with a left side portion 2 , a front side portion 3 , a right side portion 4 and a rear side portion 5 . The left side portion 2, the front side portion 3, the right side portion 4, and the rear side portion 5 each have a substantially rectangular shape. In addition, hereinafter, the left side portion 2, the front side portion 3, the right side portion 4, and the rear side portion 5 are also collectively referred to as "side portions".

The body portion 11 has a rectangular shape extending in a belt shape in the unfolded state. In this unfolded state, the body portion 11 has the left side portion 2 on one end side and the rear side portion 5 on the other end side. 2. The front side portion 3, the right side portion 4, and the rear side portion 5 are arranged side by side in this order. A crease 24 is provided at the boundary between the left side portion 2 and the front side portion 3 . A crease 43 is provided at the boundary between the front side portion 3 and the right side portion 4, and a crease 44 is provided at the boundary between the right side portion 4 and the rear side portion 5, respectively.

The front side portion 3 in this embodiment is the first side portion in the scope of claims. Also, the left side surface 2 and the right side surface 4 in this embodiment are a set of second side surfaces, and the rear side surface 5 is a third side surface in the claims.

From the side opposite to the front side surface portion 3 of the left side surface portion 2, an adhesive portion 6 used when forming the main body portion 11 into a rectangular tubular shape extends in the direction in which the side portions are arranged. A crease 23 is provided at the boundary between the left side portion 2 and the adhesive portion 6 .

A substantially rectangular inner lid flap 31 extends from the upper side of the front side portion 3 in a direction intersecting the direction in which the side portions are arranged. A crease 35 is provided at the boundary between the front side portion 3 and the inner lid flap 31 . A substantially rectangular inner lid flap 51 likewise extends from the upper side of the rear side portion 5 . A fold line 55 is provided at the boundary between the rear side portion 5 and the inner lid flap 51 . The inner lid flap 31 and the inner lid flap 51 are each folded at approximately 90° with respect to the side surface at folds 35 and 55 to cover at least a portion of the opening on the upper side of the packaging box 10, thereby wrapping the package. It is a portion that forms part of the top surface of the box 10 . Note that the upper side of the front side surface portion 3 in this embodiment is defined as the upper end in the scope of claims. Also, the inner lid flap 31 in this embodiment is the lid flap in the claims.

A substantially rectangular outer lid flap 21 extends from the upper side of the left side portion 2 in a direction intersecting the direction in which the side portions are arranged. A crease 25 is provided at the boundary between the left side portion 2 and the outer lid flap 21 . A substantially rectangular outer lid flap 41 similarly extends from the upper side of the right side portion 4 . A fold line 45 is provided at the boundary between the right side portion 4 and the outer lid flap 41 . The outer lid flaps 21 and 41 are folded at approximately 90° with respect to the side surface at folds 25 and 45, respectively, and serve as a lid portion that closes the upper opening of the packaging box 10, It is a portion that forms part of the upper surface of the packaging box 10 .

A rectangular inner bottom flap 32 extends from the lower side of the front side portion 3 in a direction intersecting the direction in which the side portions are arranged. A crease 36 is provided at the boundary between the front side portion 3 and the inner bottom flap 32 . A substantially rectangular inner bottom flap 52 likewise extends from the lower edge of the rear side portion 5 . A fold line 56 is provided at the boundary between the rear side portion 5 and the inner bottom flap 52 . The inner bottom flap 32 and the inner bottom flap 52 are each folded at approximately 90° with respect to the side surfaces at folds 36 and 56 to close at least a portion of the lower opening of the packaging box 10, It is a portion that forms part of the bottom surface of the packaging box 10 . The lower side of the front side surface portion 3 in this embodiment is defined as the lower end in the scope of claims. Also, the inner bottom flap 32 is defined as a bottom flap in the scope of claims.

A substantially rectangular outer bottom flap 22 extends from the lower side of the left side portion 2 in a direction intersecting the direction in which the side portions are aligned. A crease 26 is provided at the boundary between the left side portion 2 and the outer bottom flap 22 . A substantially rectangular outer bottom flap 42 likewise extends from the lower edge of the right side section 4 . A fold line 46 is provided at the boundary between the right side portion 4 and the outer bottom flap 42 . The outer bottom flaps 22 , 42 are folded at approximately 90° with respect to the side surfaces at fold lines 26 , 46 , respectively, to close part of the opening on the lower side of the packaging box 10 . It is a part that becomes part of the department. The outer lid flap 21 and the outer lid flap 41 in this embodiment are the outer lid flaps in the claims. Further, the outer bottom flap 22 and the outer bottom flap 42 in this embodiment are the outer bottom flaps in the claims, and the inner bottom flaps 32 and 52 and the outer bottom flaps 22 and 42 in the present embodiment are in the claims. It is considered as the bottom side flap in In the following description, the folds 23 to 26, folds 35 and 36, folds 43 to 46 and folds 55 and 56 are collectively referred to as "folds." In addition, the boundaries between the side surfaces on which folds are provided and the boundaries between the side surfaces and the flap are simply referred to as “folds”.

In the present embodiment, the crease refers to a linear ruled line provided on at least one surface of the sheet material 1 so as to facilitate folding of the sheet material 1 at a desired position. Specifically, it refers to a linear portion (depressed portion) obtained by compressing a desired portion of the sheet material 1 in the thickness direction and crushing the liner and core portion on one side. In the present embodiment, the following description will be made by applying to an example in which each crease is provided on the inner surface of the sheet material 1, which is the side facing inward when the packaging box 10 is assembled. In addition, on the portions of the outer surface of the sheet material 1 corresponding to the folds 25, 35, 45, 55 and the folds 26, 36, 46, 56 provided in the direction intersecting the paper width direction of the sheet material 1, A pair of auxiliary ruled lines (not shown) are provided substantially parallel to the respective folds provided on the inner surface so as to sandwich the respective folds. Taking the crease 25 as an example, the sheet material 1 is compressed in the thickness direction toward the inner surface of the sheet material 1 at the crease 25 side portion of the outer surface of the left side surface portion 2 . A linear auxiliary ruled line 25 a is formed substantially parallel to the fold line 25 . In addition, linear auxiliary creases 25b formed by compressing the sheet material 1 in the thickness direction toward the inner surface of the sheet material 1 are formed on the fold line 25 side of the outer surface of the outer lid flap 21. They are provided substantially parallel to the folds 25 (see FIG. 2(b)).

Similarly, auxiliary creases (not shown) are provided on the outer surface of the sheet material 1 corresponding to the other folds 35, 45, 55 and the folds 26, 36, 46, 56, respectively. By providing such auxiliary ruled lines, it is possible to easily fold the sheet material 1 in a predetermined direction even when the crease is provided in the direction crossing the paper width direction of the corrugated cardboard sheet. If the sheet material 1 can be folded at a desired position, the preliminary ruled lines as described above may be omitted. The creases may also be provided by other known methods.

A pair of easy-to-open lines 71R and 71L are provided on the front side portion 3 substantially parallel to the folds 24 and 43. As shown in FIG. The easy-open line 71R is provided on the right side of the front side portion 3 (right side portion 4 side), and the easy-open line 71L is provided on the left side of the front side portion 3 (left side portion 2 side). is provided. The easy-open lines 71R and 71L in this embodiment are a set of first easy-open lines in the claims.

Here, the easy-to-open line refers to the sheet material 1 that is processed so that the sheet material 1 can be torn in a desired direction when a user who performs an operation such as opening the packaging box 10 applies a force in a predetermined direction. refers to the part of In the present embodiment, the easy-to-open lines 71R and 71L are a breaking line in which substantially dogleg-shaped cuts are continuously arranged on the same imaginary line at a predetermined interval, The following description applies to an example of linear cuts provided. The easy-tear line may be formed by processing the sheet material 1 by other known methods as long as the sheet material 1 is processed so that the user can easily tear the sheet material 1 in a predetermined direction. good too. In the following description, the direction in which the imaginary line in which the notches of the easy-to-open line extend is also referred to as "the direction of the easy-to-open line" or "the direction in which the easy-to-open line extends".

The easy-to-open lines 71R are provided so that their ends intersect the folds 35 and 36 . 71 L of easy opening lines are similarly provided so that each edge may cross the crease|fold 35 and the crease|fold 36. As shown in FIG.

In the present embodiment, in a state in which the end of the easy-open line and the crease intersect (formed), the end of the notch arranged on the farthest side of the easy-open line In addition to the case where the cut is provided on the fold line, the state in which the cut is provided to cross the fold line is also included. In addition, even if the end of the notch arranged on the farthest side of the easy-open line is spaced apart from the corresponding crease, the length of the separation is enough for the user to follow the easy-open line. When tearing the sheet material 1, if the length is such that the fold can be easily torn in the intended direction, the easy-open line is included in the state of being arranged across the fold. shall be

Taking the easy-open line 71R as an example, even if the lower end of the notch arranged on the bottom side of the easy-open line 71R and the fold line 36 are separated from each other, for example, the separation distance is If the length of the interval d between the notches of the fracture lines forming the easy-open line 71R is substantially the same as or shorter than the length of the interval, the easy-open line 71R intersects the fold line 36. Assume that it is provided (see FIG. 13(a)). Alternatively, the lower end of the notch arranged on the bottom side of the easy-open line 71R is a portion (front side portion 3), the easy-open line 71R is provided to intersect the fold line 36. Alternatively, the lower end of the notch arranged on the bottom side of the easy-open line 71R is the portion of the preliminary crease 36a provided on the outer surface of the front side surface portion 3 (which is recessed more than the other portions). part), the easy-to-open line 71R is assumed to be in a state of intersecting with the folding line 36 (see FIG. 13(b)). The same applies to other easy-open lines and other creases.

In the present embodiment, the lower ends of the cuts provided on the lowermost side of the easy-open lines 71R and 71L are on the fold line 36, and the ends of the cuts provided on the uppermost side of the easy-open lines 71R and 71L are aligned. The following description applies to the example in which the upper edge is on the crease 35 .

An easy-open line 75R is provided between the intersection point b1 where the easy-open line 71R and the fold line 36 intersect (the intersection point where the imaginary line along which the cuts of the easy-open line 71R are arranged and the fold line 36 intersect) and the right end of the fold line 36. ing. An easy-open line 75L is formed between the intersection point b2 where the easy-open line 71L and the fold line 36 intersect (the intersection point where the imaginary line of the easy-open line 71L and the fold line 36 intersect) and the left end of the fold line 36. is provided. In the present embodiment, the easy-opening lines 75R and 75L are applied to an example in which each of the easy-opening lines 75R and 75L is a substantially H-shaped notch extending in the same direction as the fold line 36, and the following description will be made.

Specifically, the easy-opening lines 75R and 75L are linear cuts provided on the fold line 36, respectively, and the linear cuts provided so as to intersect both sides of the linear cuts at right angles. The following description is applied to an example in which the incision is shorter than . By providing short cuts perpendicular to both sides of the cuts in this manner, when force is applied to the packaging box 10, it is possible to prevent the tear from spreading from the end sides of the easy-to-open lines 75R and 75L. can. The easy-open lines 75R and 75L may be cuts having other known shapes or easy-open lines processed by other known methods. The easy-open lines 75R and 75L in this embodiment are the sixth easy-open line and the seventh easy-open line in the claims.

The inner lid flap 31 is mainly provided with easy-open lines 72R and 72L, an easy-open line 73, an easy-open line 74, a through hole 76, and a through hole 77. As shown in FIG. The easy-open line 72R is a side 38 of the inner lid flap 31 on the opposite side of the fold line 35 from the point where the easy-open line 71R and the fold line 35 intersect (the intersection of the imaginary line where the cuts of the easy-open line 71R line up and the fold line 35). , extending linearly to the vicinity of the center of the inner lid flap 31. In other words, the easy-to-open line 72R is a break line formed to extend continuously on the same line as the direction in which the easy-to-open line 71R extends when the packaging box 10 is unfolded. In the present embodiment, the easy-open line 72R is an example in which the easy-open line 71R extends linearly from the intersection of the linear cut on the fold line 35 side of the easy-open line 71R and the fold line 35 toward the side 38 to the vicinity of the center of the inner lid flap 31. is applied to the following description.

The easy-open line 72L extends linearly from the point where the easy-open line 71L and the fold 35 intersect (the intersection of the imaginary line where the cuts of the easy-open line 71L line up and the fold 35) toward the side 38 to near the center of the inner lid flap 31. It is a break line that extends. In other words, the easy-open line 72L extends continuously from the easy-open line 71L on the same line as the direction in which the easy-open line 71L extends in the unfolded state of the packaging box 10 . In the present embodiment, the easy-open line 72L extends linearly toward the side 38 from the intersection of the straight line cut of the easy-open line 71L provided on the side of the fold 35 and the fold 35 to the vicinity of the center of the inner lid flap 31. The following description is applied to an example where Further, in the present embodiment, the easy-to-open lines 72R and 72L are applied to an example in which substantially dogleg-shaped notches are provided at predetermined intervals, and the subsequent description will be given. The easy-open lines 72R and 72L may be broken lines in which notches of other shapes are provided at predetermined intervals, or easy-open lines provided by other known methods. In the present embodiment, the notches on the fold line 35 side of the easy-open lines 72R and 72L intersect the fold line 35 and are applied to an example in which they extend linearly to the front side surface portion 3 for explanation. That is, the cuts on the fold 35 side of the easy-open lines 72R and 72L intersect with the fold 35 and are continuously connected to the linear cuts on the fold 35 side of the easy-open lines 71R and 71L. to explain.

The easy-open line 73 is an arc-shaped easy-open line that connects the ends of the easy-open lines 72R and 72L on the side 38 side. In the present embodiment, the easy-open line 73 is applied to an example in which the inner lid flap 31 is cut into a predetermined portion in an arc shape, and the following description will be made. The easy-open line 73 may be formed by another known method. The easy-open line 73 may have another shape as long as it connects the ends of the easy-open lines 72R and 72L on the side 38 side.

In the present embodiment, the state in which the easy-open line and the other easy-open line are connected means, in the case where the easy-open line consists of a break line, the edge of the notch on the end side of one of the break lines, and the It refers to the case where the ends of the other breaking line extending toward the breaking line intersect. Alternatively, even if the end of one breaking line and the end of the other breaking line are separated, the length of the separation is not intended when the user tears the sheet material 1 along the easy-to-open line. If the tear extends from the notch at the end of each breaking line in the direction shown and the length is such that the ends of each notch can be easily connected, the easy-open line and other easy-open lines are connected. Suppose that Taking the easy-open line 72R and the easy-open line 73 as an example, the upper end of the uppermost notch of the easy-open line 72R and the right end of the easy-open line 73 are separated from each other. Even if this is the case, the separation distance is between the upper cut end of the easy-open line 72R and the right end of the easy-open line 73 when a force for opening is applied to those parts. Even if a tear occurs and the end of the cut above the easy-open line 72R and the end of the easy-open line 73 are easily connected, the easy-open line 72R and the easy-open line 73 are still connected.

The easy-open lines 72R and 72L in this embodiment are a set of fourth easy-open lines in the claims. The easy-open line 73 is defined as the fifth easy-open line in the claims. The easy-open lines 72R, 72L and the easy-open line 73 are defined as the second easy-open lines in the scope of claims.

The easy-to-open line 74 extends from the separation start portion 74a in the vicinity of the intersection of the easy-to-open line 72R on the side 38 side and the easy-to-open line 73 to the inner side of the fold line 35 by a predetermined distance from the side 38. It is a substantially L-shaped notch formed extending toward the portion 74 b of the lid flap 31 . The easy-to-open line 74 is a line for dividing the lid-side residual portion 30, which will be described later in detail, into two left and right portions when unsealing. Note that the easy-open line 74 may have another shape as long as it can divide the lid-side residual portion 30 into two left and right portions. Alternatively, the easy-open line 74 may be an easy-open line provided by another known method. In the present embodiment, the portion 74b is provided in the portion of the inner lid flap 31 that is about 10 mm away from the side 38 toward the fold line 35 in the direction in which the easy-open line 72R extends. . The position of the portion 74b is such that when the packaging box 10 is unsealed, the tear extending from the easy-open line 74 reaches the side 38, and the user can divide the lid-side residual portion 30 into two parts, left and right. If there is, it may be provided at a position different from that described above. Alternatively, an easy opening line 74 may be provided on the side 38 . That is, the easy-to-open line 74 may extend to the side 38 .

In the present embodiment, the separation start portion 74a is provided at a position shifted to the right by about 2 to 3 mm from the point where the end of the easy-open line 72R on the side 38 side and the right end of the easy-open line 73 intersect. This is explained by applying it to an example where The separation start portion 74a may be provided at a location other than the above. For example, the separation start portion 74a may be provided at a portion where the easy-open line 72R and the easy-open line 73 intersect. Alternatively, the separation start portion 74a may be provided at a location on the easy-open line 72R near the intersection of the easy-open line 72R and the easy-open line 73, or at a location on the easy-open line 73.

Alternatively, the separation start portion 74a is formed at an arbitrary position on the easy-open line 72R or the easy-open line 73 when the user applies force to split the lid-side residual portion 30, which will be described later in detail, in the left-right direction. If a tear occurs from the location to the separation start portion 74a, and if the distance is such that the easy-open line 72R or the easy-open line 73 and the separation start portion 74a are connected, the separation start portion 74a , and may be provided at any location on the lid-side residual portion 30 . The easy-open line 74 in this embodiment is the third easy-open line in the claims. Also, the side 38 is defined as an end side in the scope of claims.

In the present embodiment, the front side portion 3 and the inner lid flap 31 that are partitioned by the easy-open lines 71R, 71L, the easy-open lines 72R, 72L, and the easy-open line 73 are the unsealable portions 37 . The unsealable portion 37 is torn from the side 38 toward the bottom surface of the front side portion 3 along the easy-to-open lines 71R, 71L, the easy-to-open lines 72R, 72L, and the easy-to-open line 73 provided on the periphery. , forming a take-out opening 39, which is a part of the opening for taking out the contents. In the following description, the edge 38 side of the opening portion 37 of the inner lid flap 31 is also referred to as the "opening start side".

A portion of the inner lid flap 31 opposite to the unsealable portion 37 defined by the easy-to-open lines 72R and 72L and the easy-to-open line 73 is the lid-side residual portion 30. As shown in FIG. The lid-side residual portion 30 includes a right region 30a sandwiched between the easy-open line 72R and the right side of the inner lid flap 31, and a left region sandwiched between the easy-open line 72L and the left side of the inner lid flap 31. 30b is a substantially U-shaped portion connected by an end region 30c sandwiched between the side 38 and the easy-open line 73. As shown in FIG.

A substantially elliptical through-hole 76 is provided in a portion of the inner lid flap 31 on the unsealing start side of the unsealing portion 37 . Further, a substantially elliptical through hole 77 is provided in a portion closer to the crease 35 than the through hole 76 with a belt-shaped holding portion 78 interposed therebetween. The through hole 76 and the through hole 77 are portions through which the user inserts and withdraws fingers when forming the extraction opening 39 . The holding portion 78 is a portion held by a finger or the like inserted into the through holes 76 and 77 when the user opens the packaging box 10 . The through holes 76 and 77 in this embodiment are defined as the insertable portion in the claims.

Outer lid flap 41 and outer bottom flap 42 are provided with fold lines 47 and 48, respectively, extending parallel to fold line 44. As shown in FIG. Fold lines 47 and 48 are fold lines for folding the right side 4, the outer lid flap 41 and the outer bottom flap 42 when the packaging box 10 is flattened and folded into a more compact size.

In the present embodiment, the bending line 47 is applied to an example in which the outer lid flap 41 is provided at the portion of the phantom line 49 and extends in the direction in which the phantom line 49 extends. These two cuts are arranged side by side with a gap in the direction in which the imaginary line 49 extends. The imaginary line 49 extends from the end of the crease 55 on the side adjacent to the left side surface 2 for the same length as the width X in the front-rear direction of the packaging box 10 (the width in the front-rear direction of the left side surface 2). An imaginary straight line extending parallel to the fold line 44 passing through a point b3 on the fold line 45 located at a distance on the line.

In the present embodiment, the bending line 48 is applied to an example in which two notches are provided in the portion of the outer bottom flap 42 along the imaginary line 49 and extend in the direction in which the imaginary line 49 extends. These two cuts are arranged side by side with a gap in the direction in which the imaginary line 49 extends.

In addition, the bending lines 47 and 48 may be provided on the portion of the imaginary line 49 of the right side portion 4 . Alternatively, the folding lines 47 and 48 may be provided on at least one of the outer lid flap 41 , the outer bottom flap 42 and the right side portion 4 on the side of the folding line 43 with respect to the imaginary line 49 . Fold lines 47 , 48 may also be provided on the outer lid flap 21 and the outer bottom flap 22 or on the left side 2 . Further, the fold lines 47, 48 may be fold lines provided on the imaginary line 49, or may be fold lines provided in any other known manner to facilitate folding. Alternatively, the configuration may be such that the bending lines 47 and 48 are not provided.

In the present embodiment, the cuts forming the breaking lines and the cuts provided in other parts are formed by inserting a blade from one side of the sheet material 1 so as to correspond to the liner on at least one side of the sheet material 1. The following description is applied to an example in which at least a part of the core at the portion where the core is formed is cut. The incisions are formed through the sheet material 1 by similarly incising a portion of the corresponding liner on the opposite side, or by completely cutting both the liner and core in the corresponding portion. You can

<Description of easy-open lines 71R and 71L>
Next, the easy-to-open lines 71R and 71L will be described with reference to FIGS. 11(a) and 11(b). In the present embodiment, the easy-to-open lines 71R and 71L are breaking lines in which substantially dogleg-shaped cuts are continuously provided at predetermined intervals. Specifically, the easy-to-open lines 71R and 71L are formed by alternately linearly arranging cuts e in which the vertex j1 of the cut faces the right side (the side of the fold 43) and cuts f in which the vertex j2 of the cut faces the left side (the side of the fold 24). (see FIG. 11(a)).

The incision e consists of a downwardly extending incision g1 and an upwardly extending incision h1. The notch f is composed of a downwardly extending notch g2 and an upwardly extending notch h2, and the intersection of the notch g2 and the notch h2 is defined as a vertex j2 (see FIG. 11(b)). In addition, in this embodiment, the length of the cut g1, the cut h1, the cut g2, and the cut h2 will be described by applying to an example in which the lengths are substantially the same. The length of the cut g2 and the length of the cut h2 may be different. Alternatively, the lengths of the cut g1, the cut h1, the cut g2, and the cut h2 may be different.

The notch e and the notch f are arranged such that their upper and lower ends are on the imaginary line A extending in the same direction as the easy-open lines 71R and 71L. That is, the cuts e and f are arranged so that the lower ends of the cuts g1 and g2 and the upper ends of the cuts h1 and h2 are on the same imaginary line A, respectively. In addition, the notch e and the notch f are arranged so that the distance therebetween is the distance d1. Specifically, the incision e and the incision f are the lower end of the incision e (the lower end of the incision g1) and the upper end of the incision f adjacent to the lower side of the incision e (the notch The upper end of h2) is arranged so that there is a distance d1. In addition, between the upper end of the cut e (the upper end of the cut h1) and the lower end of the cut f adjacent to the upper side of the cut e (the lower end of the cut g2), The notch e and the notch f are arranged so as to have a distance d1.

In the easy-open lines 71R and 71L thus formed, substantially dogleg-shaped cuts e and cuts f are alternately arranged side by side at predetermined intervals. Therefore, in the direction in which the incision g1 below the incision e extends (on the extended line of the lower side of the incision g1), there is no incision f that crosses the incision g1. Also, in the direction in which the cut h1 of the cut e extends (on the extension line above the cut h1), there is no cut f that intersects with the cut h1. Similarly, there is no incision e that intersects the direction in which the incision g2 of the incision f extends (on the lower extension of the incision g2) or the direction in which the incision h2 extends (on the upper extension of the incision h2).

For example, when the packaging box 10 is subjected to an impact during transportation, and unintended force is applied to the packaging box 10, a vertical force may be applied to the easy-to-open lines 71R and 71L. In this case, a crack may occur in the direction in which the cut g1 and the cut g2 extend from the lower end of the cut e and the lower end of the cut f. However, in the case of the easy-open lines 71R and 71L composed of the break lines configured as described above, the cut e and the cut f constituting each break line are arranged with a predetermined distance d1, and the cut e and the cut are arranged. Since there are no other cuts in the direction in which the cuts g1 and g2 and the cuts h1 and h2 that make up f are extended, the cracks naturally extending from the ends of the cuts are continuously connected to other adjacent cuts, easily It is possible to prevent the opening lines 71R and 71L from spontaneously tearing. Note that the intervals between the cuts e and f may not be evenly spaced as long as the cuts g1 and g2 and the cuts h1 and h2 are arranged such that there are no other cuts in the respective extending directions. . For example, the distance between the lower edge of incision e and the upper edge of incision f adjacent to the lower side of incision e, and the upper edge of incision e to the upper edge of incision f adjacent to the upper side of incision e The distances between the lower ends of the can be of different lengths. Alternatively, all the intervals between the notch e and the notch f may be different distances.

The easy-open line may be configured as shown in FIG. 12(a). Specifically, with reference to FIGS. 12(a) and 12(b), the easy-open lines 81R and 81L are each composed of a broken line in which substantially dogleg-shaped notches are arranged in two rows. there is Taking the easy-opening line 81R as an example, the easy-opening line 81R is composed of a substantially dogleg-shaped notch k1 arranged on the imaginary line B at predetermined intervals, and a substantially dogleg-shaped notch row B1. The cut k2 is composed of a line of cuts C1 arranged on a virtual line C extending parallel to the virtual line B at a predetermined interval (see FIG. 12(a)). Both the virtual line B and the virtual line C are virtual straight lines extending in the direction in which the easy opening line 81R extends.

A notch k1 forming the notch row B1 is made up of a downwardly extending notch m1 and an upwardly extending notch n1. The portion where the cut m1 and the cut n1 intersect is the vertex of the cut k1. In this embodiment, the length of the cut m1 and the length of the cut n1 are different from each other, but the length of the cut m1 and the cut n1 may be substantially the same. The cuts k1 are arranged linearly with an interval d2 so that the lower ends of the cuts m1 are positioned on the imaginary line B, respectively. That is, the direction in which the virtual line B extends between the lower end of one incision m1 of one incision k1 and the upper end of the incision n1 of another incision k1 adjacent to the lower side of the incision k1. Each is arranged so that the length becomes the distance d2. 12 ( b) see.).

A notch k2 forming the notch row C1 is made up of a downwardly extending notch m2 and an upwardly extending notch n2. The cut k2 is arranged so that the vertex where the cut m2 and the cut n2 intersect faces the same side as the vertex of the cut k1. In this embodiment, the length of the cut m2 and the length of the cut n2 are different from each other, but the length of the cut m2 and the cut n2 may be substantially the same. The cuts k2 are arranged in a straight line with an interval d3 so that the lower ends of the cuts m2 are positioned on the imaginary line C, respectively. That is, the direction in which the imaginary line C extends between the lower end of the incision m2 of one incision k2 and the upper end of the incision n2 of the other incision k2 adjacent to the incision k2 on the lower side. Each is arranged so that the length becomes the distance d3. In other words, between the notches k2 arranged on the virtual line C, a second region p2 having no notch and having a length d3 in the direction in which the virtual line C extends is provided.

The cuts k1 and the cuts k2 are alternately arranged left and right in the direction in which the easy-opening line 81R extends, and are arranged at intervals d4. Specifically, the notch k1 is provided in a portion on the virtual line B adjacent to the second region p2. The notch k2 is provided in a portion on the imaginary line C adjacent to the first region p1. That is, the cuts k1 and the cuts k2 are alternately arranged in the portions adjacent to the regions where the respective cuts are not provided.

The cut k1 is arranged such that its upper end is separated from the lower end of the cut k2 adjacent on the upper side by a distance d4 in the direction in which the virtual lines B and C extend. In addition, the cut k1 is arranged such that its lower end is located at a distance d4 in the direction in which the virtual lines B and C extend from the upper end of the cut k2 adjacent to the lower side. there is

The cut k2 is arranged such that its upper end is separated from the lower end of the adjacent cut k1 on the upper side by a distance d4 in the direction in which the virtual lines B and C extend. In addition, the cut k2 is arranged such that its lower end is located at a distance d4 in the direction in which the virtual line B and the virtual line C extend from the upper end of the cut k1 adjacent to the lower side. . The easy-open line 81L is also configured in the same manner as the easy-open line 81R.

In the easy-open lines 81R and 81L configured in this way, the cuts k1 and the cuts k2 are alternately arranged with a space therebetween, and at least the cuts k1 constituting the cut row B1 extend in the lower direction of the cuts m1. There is no adjacent incision (on the downward extension of the incision m1). Therefore, even if a vertical force is applied to the packaging box 10 and the cut extends in the downward direction where the cut m1 of the cut k1 extends, there is little fear that the cut will connect to the adjacent cut k2. Therefore, it is expected that the easy-to-open lines 81R and 81L are prevented from being naturally broken even when a vertical force is applied during transportation of the packaging box 10, for example. In addition, in the present embodiment, the cut k1 and the cut k2 are respectively arranged on the virtual line B and the virtual line C at equal intervals. , may be arranged at different intervals as long as they are arranged so that there are no adjacent cuts. For example, the cuts k1 may be arranged on the imaginary line B at different intervals, or the cuts k2 may be arranged on the imaginary line C at different intervals. Alternatively, the distance between the cut k1 and the cut k2 adjacent in the direction in which the virtual line B and the virtual line C extend may be arranged at different distances.

2. Description of Assembling Method Next, the method of assembling the packaging box 10 will be described mainly with reference to FIGS. 1 and 2. FIG. First, the main body 11 is folded inwardly at the creases 24, 43 and 44 so that the angles formed by the adjacent side faces are approximately 90°, and the main body 11 is assembled into a rectangular tubular shape. Next, the adhesive portion 6 is folded inward at the crease 23, and the outer surface thereof is fixed to the side portion of the inner surface of the rear side portion 5 adjacent to the left side portion 2 by a known adhesive method or the like. .

After assembling the main body 11 into a rectangular tubular shape, the opening on the lower side of the main body 11 is closed to form the bottom surface of the packaging box 10 . Specifically, the inner bottom flap 32 is folded inward at the crease 36 so as to form an approximately 90° angle with respect to the front side portion 3 . The inner bottom flap 52 is likewise folded inwardly at a crease 56 at approximately 90° to the rear side portion 5 . The outer bottom flap 22 is then folded at the crease 26 so that its inner surface overlaps the outer surface of the inner bottom flap 32 and the outer surface of the inner bottom flap 52 . Similarly, outboard bottom flap 42 is folded at crease 46 so that its inside surface overlaps the outside surface of inside bottom flap 32 and the outside surface of inside bottom flap 52 . After the outer bottom flaps 22 and 42 are folded to close the opening on the lower side of the body portion 11, the outer bottom flaps 22 and 42 are secured by known methods such as adhesive tape.

After the contents such as products are stored inside the packaging box 10, the upper opening of the main body 11 is closed. Specifically, the inner lid flap 31 is folded inward so that the angle between the inner lid flap 31 and the front side surface portion 3 at the crease 35 is approximately 90°. In addition, the inner lid flap 51 is folded inward so that the angle between the inner lid flap 51 and the rear side portion 5 at the crease 55 is 90°. Subsequently, the outer lid flap 21 is folded at the crease 25 such that the inner surface overlaps the outer surface of the inner lid flap 31 and the outer surface of the inner lid flap 51 . Further, the outer lid flap 41 is folded at the crease 45 so that the inner surface overlaps the outer surface of the inner lid flap 31 and the outer surface of the inner lid flap 51 . After the outer lid flap 21 and the outer lid flap 41 are folded to close the upper opening of the main body 11 (packaging box 10), the outer lid flap 21 and the outer lid flap 41 are fixed by a known method such as adhesive tape.

3. Description of Opening Method Next, mainly referring to FIGS. 2 to 6, a method of opening the packaging box 10 will be described.
First, the lid, which is the upper surface of the packaging box 10, is opened. Specifically, the adhesive tape or the like that fixes the outer lid flap 21 and the outer lid flap 41 is removed, and the outer lid flap 21 and the outer lid flap 41 are folded back and pulled outward. Subsequently, the inner lid flap 31 and the inner lid flap 51 are folded back and pulled outward to release the upper opening of the packaging box 10 (see FIG. 3).

Subsequently, the tear-off portion 37 is torn to form a removal opening 39 . Specifically, the fingers of one hand are inserted into the through-holes 76 and 77 to hold the holding portion 78 , and the opening portion 37 is pulled forward, that is, in a direction away from the packaging box 10 . At this time, either the right or left side of the lid-side residual portion 30 is held with the other hand, and the lid-side residual portion 30 is held down so as not to move forward due to the unsealing portion 37 .

This embodiment applies to an example in which the user holds the holding portion 78 with the right hand and presses the left portion of the lid-side residual portion 30 on the side 38 side with the left hand to perform the opening operation, which will be described below. I do. In this case, when the user holds the holding portion 78 and pulls the unsealing start side of the unsealable portion 37 forward, the lid-side residual portion 30 is also subjected to force in the forward direction together with the unsealable portion 37 . However, since the left portion (left region 30b) of the lid-side residual portion 30 is held by the other hand of the user, the left-hand portion of the lid-side residual portion 30 is pulled forward by the unsealing portion 37. movement is prevented. Moreover, since the right region 30a, which is the right portion of the lid-side residual portion 30, is integrated with the left region 30b by the end region 30c, it is similarly prevented from moving forward. Therefore, when the user holds the holding portion 78 and pulls the opening portion 37 forward, more specifically, in a direction away from the packaging box 10 forward and downward, the easy-open lines 72R, 72L and The easy-to-open line 73 is torn and the opening portion 37 is separated from the inner lid flap 31 portion. Further, when the user pulls the unsealable portion 37 forward, the front side portion 3 is torn along the easy-to-open lines 71R and 71L, and the unsealable portion 37 is separated from the front side portion 3 (see FIG. 4). In this embodiment, the cuts of the easy-open lines 72R and 72L on the side of the fold 35 intersect the fold 35 and are continuously connected to the linear cuts of the easy-open lines 71R and 71L on the side of the fold 35. Therefore, it is easy to tear the front side portion 3 along the easy-open lines 71R, 71L continuously from the easy-open lines 72R, 72L. That is, after tearing the inner lid flap 31 along the easy-to-open lines 72R, 72L, the tearing of the front side portion 3 is easily started when the front side portion 3 is started to be torn along the easy-to-open lines 71R, 71L. be able to. When the front side portion 3 is torn to the lower side along the easy-open lines 71R and 71L, an extraction opening 39 is formed substantially at the center of the inner lid flap 31 and the front side portion 3 in the left-right direction (Fig. 5).

The front side 3 is then fully opened to remove the contents. Specifically, first, the lid-side residual portion 30 is torn along the easy-open line 74 to divide the lid-side residual portion 30 into two parts. Further, the remaining front side portion 33 on the left side of the extraction opening 39 in the front side portion 3 is torn along the easy-opening line 75L and spread forward. Specifically, the connecting portion between the inner bottom flap 32 and the remaining front side portion 33 is torn along the easy opening line 75L, and the remaining front side portion 33 is folded until it is on the same plane as the left side portion 2. return. At this time, since the lid-side residual portion 30 connected to the upper side of the front-side residual portion 33 is torn into left and right portions along the easy-to-open line 74, one of the left sides of the lid-side residual portion 30 is the front-side residual portion 33 moves to the left side portion 2 side.

Similarly, the remaining front side portion 34 on the right side of the extraction opening 39 in the front side portion 3 is torn along the easy-opening line 75R and spread forward. Specifically, the connecting portion between the inner bottom flap 32 and the remaining front side portion 34 is torn along the easy-open line 75R, and the remaining front side portion 34 is folded until it is on the same plane as the right side portion 4. return. At this time, the other right side of the lid side residual portion 30 moves toward the right side portion 4 together with the front side residual portion 34 (see FIGS. 5 and 6).

In this way, the front side portion 3 is completely opened, and the contents can be taken out from the front portion of the packaging box 10. - 特許庁When the easy-open lines 75R and 75L are torn, the inner bottom flap 32 is separated from the other parts of the packaging box 10 together with the opening part 37, and can be separated from the other parts of the packaging box 10 (Fig. 6). reference).

4. Folding method of packaging box after contents are taken out After contents are taken out from the packaging box 10, the packaging box 10 is flattened and folded for disposal or the like. First, the adhesive tape or the like fixing the outer bottom flap 22 and the outer bottom flap 42 of the packaging box 10 is peeled off, the outer bottom flaps 22, 42 and the inner bottom flaps 32, 52 are respectively folded back, and the bottom of the packaging box is Leave the side open. Further, the left side portion 2 and the right side portion 4 are folded back at the fold line 24 and the fold line 43 to form the remaining front side portion 33, the left side portion 2, the rear side portion 5, the right side portion 4, and the remaining front side portion 34 on the same plane. Unfold (see Figure 7). Further, the inner bottom flap 32 and the opening portion 37 separated at the time of opening are placed on the inner surface of the rear side portion 5 (see FIG. 7).

Subsequently, the front side residual portion 33 is folded at the crease 24 so that its inner surface overlaps the inner surface of the left side portion 2 . At this time, one inner surface of the lid-side residual portion 30 connected to the front-side residual portion 33 is made to overlap the inner surface of the outer lid flap 21 . Subsequently, the left side portion 2 is folded at the crease 23 so that the inner surface thereof overlaps the inner surface of the rear side portion 5 . That is, the left side portion 2 is folded at the crease 23 so that the inner bottom flap 32 and the opening portion 37 separated at the time of opening are sandwiched between the inner surface of the rear side portion 5 and the inner surface of the left side portion 2 . At this time, the inner surface of the outer lid flap 21 and the surface of the inner lid flap 51 sandwich the portion of the opening portion 37 on the unsealing start side. Also, the inner bottom flap 32 is sandwiched between the inner surface of the outer bottom flap 22 and the inner surface of the inner bottom flap 52 (see FIG. 8).

Subsequently, the right side portion 4, the outer lid flap 41 and the outer bottom flap 42 are folded along folding lines 47,48. Specifically, the inner surfaces of the portions of the right side portion 4, the outer lid flap 41 and the outer bottom flap 42 that are closer to the crease 43 than the folding lines 47 and 48 are the left side portion 2, the outer lid flap 21 and the outer side, respectively. The right side portion 4, the outer lid flap 41 and the outer bottom flap 42 are folded so as to overlap the outer surface of the bottom flap 22 (see FIG. 9). When the right side portion 4, the outer lid flap 41 and the outer bottom flap 42 are folded in this manner, the packaging box 10 can be folded so as to reduce its surface area (see FIG. 10).

According to the packaging box having the above configuration, the portion of the opening portion 37 on the opening start side is divided by the easy-to-open lines 72R and 72L of the inner lid flap 31 and the easy-to-open line 73 in a substantially U shape. It is provided. That is, the lid-side residual portion 30 is provided on the side opposite to the opening portion 37 defined by the easy-open lines 72R, 72L and the easy-open line 73 of the inner lid flap 31 . In this lid-side residual portion 30, a right region 30a on the right side of the unsealable portion 37 and a left region 30b on the left side of the unsealable portion 37 are connected at an end region 30c on the side 38 side of the unsealable portion 37. It is roughly U-shaped. Therefore, when the user holds the portion of the unsealable part 37 on the unsealing start side with one hand and pulls it forward, the user cannot press either the left or right side of the lid-side residual part 30 with the other hand. For example, in addition to the one hand-held side of the lid-side residual portion 30, the end region 30c and the portion of the lid-side residual portion 30 opposite to the hand-held side are also pulled by the unsealing portion 37. Prevents forward movement. Therefore, the easy-open lines 72R, 72L and the easy-open lines 73 can be respectively transmitted with a predetermined force necessary for tearing the sheet material 1, and the easy-open lines 72R, 72L and the easy-open lines 73 can be easily torn. be able to. Therefore, the opening operation of the packaging box 10 can be easily performed.

In addition, since the portion of the unsealing portion 37 on the unsealing start side is provided on the inner lid flap 31, when the opening on the upper side of the packaging box 10 is closed, the unsealing start side of the unsealing portion 37 is positioned on the outer lid flap 21. and covered with the outer lid flap 41 . Therefore, it is possible to prevent the unsealing portion 37 from being erroneously opened while the lid portion of the packaging box 10 is closed. Also, an extraction opening 39 is formed in the front side surface of the packaging box 10 so that the front side surface of the packaging box 10 can be completely opened. Therefore, it is possible to provide the packaging box 10 from which heavy contents such as beverages can be easily taken out from the packaging box 10 without being lifted upward.

Further, the inner lid flap 31 is provided with an easy-to-open line 74 for dividing the lid-side residual portion 30 into two parts, left and right. In order to take out more of the contents from the front side of the packaging box 10, the remaining front side portions 33 and 34 of the front side portion 3 remaining on the front side of the packaging box 10 after the opening portion 37 is torn are removed. It should be opened and the front side should be fully open. On the other hand, since the front side residual portion 33 and the front side residual portion 34 are connected via the lid side residual portion 30, they cannot be expanded as they are. However, by separating the lid-side residual portion 30 into two left and right portions by the easy-open line 74, the front-side residual portion 33 and the front-side residual portion 34 are separated, and the front-side residual portion 33 and the front-side residual portion 34 are separated. can be left open.

Further, the easy-open line 74 extends toward the side 38 from a separation start portion 74a near the intersection of the easy-open line 72R and the easy-open line 73. As shown in FIG. For example, when the separation start portion 74a is provided between the easy-open line 73 and the side 38, the distance between the separation start portion 74a and the side 38 is shortened, is the same direction as the opening. Therefore, for example, when the unsealable portion 37 is unsealed, the easy-to-open line 74 may be torn spontaneously, and the lid-side residual portion 30 may be separated into two parts. Further, when the separation start portion 74a is provided in the portion of the right region 30a or the left region 30b on the fold line 35 side, the length of the easy-to-open line 74 becomes long. In this case, the user has to cut the long easy-open line 74 in order to divide the lid-side residual portion 30 into two. Also, providing such a long easy-open line 74 may reduce the strength of the inner lid flap 31 . On the other hand, if the easy-open line 74 is provided near the intersection of the easy-open line 72R and the easy-open line 73, the work of separating the lid-side residual portion 30 into two can be facilitated, and the inner lid can be easily separated. There is no fear of lowering the strength of the flap 31 .

Further, the easy-open line 74 is substantially L-shaped. That is, the easy-to-open line 74 extends from the separation start portion 74 a to one side away from the opening portion 37 and further extends toward the side 38 . At the time of unsealing, a force in the direction (vertical direction) in which the unsealing portion 37 is torn is applied to the separation starting portion 74a. Therefore, when the part of the easy-to-open line 74 on the side of the separation start portion 74a is provided in a direction extending vertically, the easy-to-open line 74 is naturally torn in the middle of the opening operation, and the lid-side residual portion 30 is divided into two. There is a fear of being divided. However, the shape of the easy-open line 74 is substantially L-shaped so that the portion on the side of the separation start portion 74a (the side of the opening portion 37) extends in a direction intersecting the direction in which the opening portion 37 is torn (vertical direction). By doing so, it is possible to prevent the unintentional tearing of the easy-open line 74 at the time of unsealing.

Furthermore, a through hole 76 and a through hole 77 are provided in a portion of the inner lid flap 31 on the unsealing start side of the unsealing portion 37 . By providing such a through-hole, the user can easily grasp the end of the unsealing portion 37 by inserting his or her finger, thereby facilitating the unsealing operation. again. Since the holding portion 78 is provided between the through-holes 76 and 77, the user can easily hold the opening portion 37 and further facilitates the opening operation.

Further, easy-opening lines 75R and 75L are provided on the lower side portion of the front side portion 3, that is, on the fold line 36. As shown in FIG. When the contents are to be taken out from the front side surface of the packaging box 10, the remaining front side surface portion 33 and the front side surface remaining portion 34 remaining on the front side surface of the packaging box 10 after the opening portion 37 is cut open. There is a need. By providing the easy-to-open lines 75R and 75L in this manner, the front side surface of the packaging box 10 can be left open without leaving the front side surface portion 3 that hinders the removal of the contents. .

Furthermore, fold lines 47 and 48 are provided at predetermined locations on the outer lid flap 41 and the outer bottom flap 42 . By providing such folding lines, the packaging box 10 can be easily folded into a more compact size after the contents are taken out and crushed.

The technical scope of the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the present invention. For example, in the above embodiment, the easy-to-open lines 75R and 75L are applied to the fold line 36 for explanation. On the other hand, the easy-open lines 75R and 75L may be provided on the fold line 36 side of the inner bottom flap 32 . For example, the easy-open lines 71R and 71L are provided so as to cross the fold line 36 and extend to the side of the inner bottom flap 32, and the easy-open lines 75R and 75L are extended from the ends of the easy-open lines 71R and 71L in the inner bottom flap 32. , extending toward the left and right sides of the inner bottom flap 32 . For example, the easy-to-open lines 75R and 75L may be provided on the preliminary creases provided on the outer surface of the inner bottom flap 32, or may be provided on other portions of the inner bottom flap 32 close to the crease 36. With such a configuration, when the easy-to-open lines 75R and 75L are cut, the front side remaining portion 33 and the front side remaining portion 34 are opened, and the opening portion 37 and the inner bottom flap 32 are separated, the front side of the packaging box 10 is opened. It is possible to make the packaging box 10 fearless, in which the lower part of the front side face part 3 that hinders taking out of the contents remains on the side face.

Alternatively, the easy-to-open lines 75R and 75L may be provided in the portion of the front side surface portion 3 above the fold line 36. As shown in FIG. For example, the easy-to-open lines 75R and 75L may be provided on the preliminary ruled lines provided on the outer surface of the front side portion 3, or may be provided on other portions of the front side portion 3 close to the crease 36. By providing the easy-open lines 75R, 75L at such locations, the easy-open lines 75R, 75L may be naturally torn due to the concentration of force in the vertical direction, or the strength of the packaging box 10 may be reduced. It can also be expected to prevent a decline or the like.

Further, in this embodiment, an A-type packaging box in which the opening on the lower side of the rectangular cylindrical main body 11 is closed with the inner bottom flaps 32, 52 and the outer bottom flaps 22, 42 will be described as an example. However, it is not limited to this. For example, the packaging box 10 may be a one-touch type packaging box in which a flap on the bottom side is expanded to form a bottom portion as the body portion 11 is formed into a square tube shape. Specifically, the bottom portion is formed from the inner bottom flap 32 and the outer bottom flap 22 which are integrally formed by a method such as bonding, and the inner bottom flap 52 and the outer bottom flap 42 which are integrally formed by a method such as bonding. It may be a packaging box configured. In such a one-touch type packaging box, creases for folding are provided at predetermined positions of either the inner bottom flaps 32, 52 or the outer bottom flaps 22, 42, and the body part is folded to assemble the packaging box 10. When 10 is formed into a rectangular tubular shape, the inner bottom flaps 32, 52 and the outer bottom flaps 22, 42 that have been folded at the creases are widened to form a bottom portion. Each of the inner bottom flaps 32, 52 and the outer bottom flaps 22, 42 is provided with an engaging portion formed in a predetermined shape, and the engaging portions are engaged with each other in a state where the bottom portion is formed. The bottom part is fixed.

Further, in the present embodiment, the main body part 11 of the packaging box 10 has been described as being applied to an example in which both sides are open and has a rectangular tubular shape, but one side of the main body part 11 is closed. It may have a rectangular cylindrical shape. Specifically, the packaging box 10 is a "tortoise-shaped" packaging box in which the sides of the packaging box are formed by bending the side portions extending from the bottom portion forming the bottom surface at the boundary with the bottom surface. good too. Alternatively, the packaging box 10 may be a packaging box of other known shape as long as the lid flap that closes at least a part of the upper opening extends from the upper end of the side surface. In addition, the packaging box 10 may be composed of a hexagonal cylindrical main body, a side surface, and an octagonal main body. may form the side surface of a polygonal cylinder.

Further, in the present embodiment, an example in which the through holes 76 and 77 are provided on the side 38 side of the unsealable portion 37 has been described. and a push-in piece formed of a crease connecting the ends of the substantially U-shaped notch. With such a configuration, the user can insert his/her finger into the packaging box 10 by pushing the push-in piece toward the inside of the packaging box 10, and hold the end of the opening portion 37 to open the box. I will be able to do it. Also, the configuration can be simpler than that of the through holes 76 and 77 .

DESCRIPTION OF SYMBOLS 1... Sheet material 2... Left side part 3... Front side part 4... Right side part 5... Rear side part 6... Bonding part 10... Packaging box 11... Main body part 21 Outer Lid Flap 22 Outer Bottom Flap 21 Outer Lid Flap 22 Outer Bottom Flap 23 to 26 Crease 30 Lid Side Residue 30a Right Region 30b ... Left region 30c ... End region 31 ... Inner lid flap 32 ... Inner bottom flap 33, 34 ... Remaining front side portion 35, 36 ... Crease 37 ... Opening part 38 Side 39 Extraction opening 41 Outer lid flap 42 Outer bottom flap 43 to 46 Fold lines 47, 48 Bend line 49 Virtual line 51 Inner side Lid flap 52 Inner bottom flap 55, 56 Folds 71R to 72R, 71L to 72L, 73, 74, 75R, 75L Easy opening lines 76, 77 Through holes 78 Holding Part 81R, 81L: easy opening line

Claims (7)

One of a plurality of side faces connected in the shape of a rectangular tube having at least one opening, forming a set of first easy-open lines extending in a direction intersecting the upper end of the side face and arranged at predetermined intervals. a first side portion having a
a lid flap extending from the upper end and formed with a second easy-open line connecting the pair of first easy-open lines, and bent at the upper end to close at least a portion of the opening;
with
The lid flap is formed with a third easy-open line extending from the second easy-open line toward an edge of the lid flap opposite to the upper end.
packaging box. The second easy-to-open line is
a set of fourth easy-open lines extending in the direction in which the first easy-open lines extend;
A fifth easy-open line connecting ends of the set of fourth easy-open lines opposite to the upper ends,
The third easy-open line is
3. The separation starting portion extends toward the end side from a separation start portion in the vicinity of either one of locations where the pair of fourth easy-open lines and the fifth easy-open lines are connected. 1. The packaging box according to 1 . The third easy-open line is
extending from the separation start portion in a direction intersecting with the direction in which the first easy-open line extends and away from the region partitioned by the second easy-open line, and further extending toward the edge; 3. The packaging box according to claim 2 , characterized in that it has a A finger of a user who opens the packaging box can be inserted into and pulled out of the lid flap portion of the opening section defined by the set of the first easy-open lines and the second easy-open lines. 4. The packaging box according to any one of claims 1 to 3 , wherein a part is provided. a pair of second side portions that are part of the plurality of side portions and are adjacent to both sides of the first side portion;
a bottom surface portion connected to at least the lower end of the first side surface portion and forming a bottom surface opposite to the opening;
a sixth easy-open line extending from one of the first easy-to-open lines on one of the second side surfaces toward the one of the second side surfaces;
a seventh easy-to-open line extending from the other first easy-to-open line on the side of the other second side portion toward the other second side portion;
with
At least one of the sixth easy-open line and the seventh easy-open line is provided on a boundary between the first side surface portion and the bottom surface portion, or on the boundary side of the bottom surface portion. The packaging box according to any one of claims 1 to 4 , characterized by: The bottom portion is
A plurality of bottom side flaps including at least a bottom flap that extends from the lower end of the first side portion and is bent at the lower end to close at least a part of the other opening,
At least one of the sixth easy-open line and the seventh easy-open line is provided on the boundary between the first side surface portion and the bottom flap, or on the boundary side of the bottom flap. The packaging box according to claim 5 , characterized in that: The plurality of side portions are
the first side portion;
a pair of second side sections adjacent to each side of the first side section;
A third side surface portion sandwiched between the pair of second side surface portions and facing the first side surface portion is connected in a rectangular tubular shape,
an outer lid flap extending from the upper end of the second side portion and folded at the upper end of the second side portion to cover at least a portion of the opening;
an outer bottom flap extending from the lower end of the second side portion and folded at the lower end of the second side portion to cover at least a portion of the other opening;
with
At least one of the second side portion, the outer lid flap, or the outer bottom flap is formed with a folding line extending substantially parallel to a boundary between the first side portion and the second side portion. 5. The packaging box according to any one of claims 1 to 4 , characterized in that it has a

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