JP2019031317A - Packing box - Google Patents

Abstract

To prevent excessive rupture along the breaking part.SOLUTION: The packing box 10 includes a first side plate 13, a second side plate 14, a first lid plate 28 connected to the first side plate 13 and a second lid plate 29 connected to the second side plate 14. On the first side plate 13 and the second side plate 14 are provided a first folding line 30 for folding the first lid plate 28 and the second lid plate 29, a second folding line 32 for folding the first lid plate 28 of the first side plate 13 and the second lid plate 29 of the second side plate 14, and a breaking part 34 for breaking the space between the first side plate 13 and the second side plate 14. On the first side plate 13 or the second side plate 14 is provided a cut part 43 extending along the second folding line 32 from the side of the breaking part 34.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging box.

  In the field of handling articles of different sizes, a packaging box whose internal volume can be changed is used, and a cushioning material that fills the gap between the article and the packaging box is refrained. As such a packaging box, Patent Document 1 discloses a first folding curve for making the first sealed state and a second folding curve for making the second sealed state whose overall height is lower than the first sealed state. It is disclosed that a broken portion is provided from the first folding line to the second folding line. The first fold curve and the second fold curve are provided on the end plate and the side plate constituting the outer peripheral portion, and a pair of fracture portions are provided on each end plate.

JP-A-2015-58945

  In the packaging box of patent document 1, it can be set as the 2nd sealing state which made the internal volume small by fracture | rupturing an end plate along a fracture | rupture part. However, in this packaging box, no consideration is given to excessive breakage of the end plate beyond the end of the broken portion when the end plate is broken along the broken portion.

  This invention makes it a subject to provide the packaging box which can prevent the excessive fracture | rupture exceeding a fracture | rupture part, when sealing in a state with a small internal volume.

  The present invention includes a first side plate, a second side plate connected to the first side of the first side plate and bent with respect to the first side plate, and a second side plate intersecting the first side of the first side plate. A first lid plate connected to two sides and bent in the same direction as the second side plate with respect to the first side plate; and a third of the second side plate intersecting the second side of the first side plate. A second lid plate connected to the side and bent with respect to the second side plate so as to overlap the first lid plate; the second side plate of the first side plate; and the third side plate of the second side plate. And a first folding line for folding the first lid plate and the second lid plate, and the first side plate and the second side plate so as to be spaced apart from the first folding curve. A second folding line provided on the side plate for bending the first lid plate side of the first side plate and the second lid plate side of the second side plate; A rupture portion that is provided on the first side of the first side plate from the line side toward the second fold line, and that breaks between the first side plate and the second side plate; A packaging box is provided, comprising a cut portion provided in the first side plate or the second side plate so as to extend along a second folding line.

  According to this packaging box, it can be set as a 1st sealing state by bend | folding a 1st cover plate and a 2nd cover plate along a 1st folding curve. In addition, the second side plate having a smaller internal volume than the first sealed state is obtained by breaking between the first side plate and the second side plate along the broken portion and bending the first side plate and the second side plate along the second folding line. It can be in a sealed state.

  In the case of the second sealed state, the break along the break portion stops when it reaches the end of the break portion on the second folding line side and is guided to the cut portion. Therefore, it is possible to prevent the space between the first side plate and the second side plate from being excessively broken beyond the second folding curve, which is the target position, and not being a packaging box. Moreover, when it is set as the 2nd sealing state, since it is not necessary to fracture | rupture carefully along a fracture | rupture part, workability | operativity can be improved.

  The cut portion is composed of two or more cut lines provided at intervals along the second folding line. That is, the cut portion includes one or more uncut portions that are not cut at the intermediate portion. According to this aspect, when the blank of the packaging box is punched out and when the packaging box is in the first sealed state, it is possible to prevent the portion provided with the cut portion from curling. Accordingly, it is possible to prevent dust from entering the inside of the packaging box from the inside and the appearance of the packaging box from being damaged.

  From the corner side where the side of the first side plate located opposite to the first lid plate and the side of the second side plate located opposite to the second lid plate intersect, toward the notch An auxiliary folding curve is provided. According to this aspect, when the second sealed state is set, for example, the first side plate and the second side plate that are not provided with the cut portion and the auxiliary folding curve are bent first. At this time, since the second folding curve has no signature, and there is a signature between the bottom of the packaging box and the side plate, the side plate is bent along the portion with the signature. Moreover, the break along the broken portion is performed simultaneously with the bending of the side plate, and proceeds to the cut portion when reaching the end of the broken portion. At this time, since the auxiliary folding curve, the cut portion, and a part of the side plate surrounded by the first side bend, the breakage of the first side exceeding the second folding curve can be reliably prevented.

  The first cover plate is an inner flap that is bent before the second cover plate, and the cut portion is provided in the second side plate. According to this aspect, since the inner flap is continuously provided on the first side plate, the first side plate can be reliably bent before the second side plate when the second sealed state is established.

  The first side plate and the first lid plate are provided in a pair at opposite positions, and the dimension from the second folding curve to the tip of the first lid plate is the same as that of the pair of first side plates. The front ends of the pair of first lid plates are in contact with each other in a state of being bent along a curved line, and the front ends of the pair of first lid plates are provided with locking portions that lock each other. According to this aspect, in the second sealed state, the lower portion of the first side plate can be held in a bent state in the direction in which the upper portion of the first side plate and the first lid plate intersect. Therefore, the appearance of the packaging box in the second sealed state can be improved.

  The space | interval of the edge | side located on the opposite side to the said 1st cover board of a said 1st side board and a said 2nd folding line is 30 mm or less. According to this aspect, when the breakage proceeds beyond the end of the breakage portion in the second sealed state, it becomes a state that does not hold as a packaging box, but by the cut portion provided in the first side plate or the second side plate. Thus, such a state can be reliably prevented. Moreover, in the aspect which provided the auxiliary folding curve, since a side plate bends along an auxiliary folding curve, the fracture | rupture of the fracture | rupture part beyond a termination | terminus can be prevented reliably.

  A pair of the first side plate and the first lid plate are provided at the opposing positions, and a pair of the second side plate and the second lid plate are provided at the opposing positions, and the four first lid plates and the At least one location between the second cover plates is continuous through the extended fracture portion. In the case of a packaging box in which the overall height of the side plate is low, the protruding dimension of the cover plate with respect to the side plate becomes large, and the blanking of the packaging box becomes difficult. However, according to this aspect, since the 1st cover plate and the 2nd cover plate are continuing through the extended said fracture | rupture part, the workability of a blank can be improved.

  In the packaging box of the present invention, when the break along the fracture portion reaches the end of the fracture portion, it is guided to the cut portion and stops, so that the side plate is excessively broken beyond the second folding curve, and the packaging box is realized. It can be prevented from becoming in a state of being absent.

The perspective view which shows the state before sealing of the packaging box which concerns on embodiment of this invention. The top view which shows the blank of a packaging box. FIG. 3 is a partially enlarged view of FIG. 2. The perspective view which shows 1 process at the time of making a packaging box into a 1st sealing state. The perspective view which shows the packaging box of a 1st sealing state. The perspective view which shows 1 process at the time of making a packaging box into a 2nd sealing state. The perspective view which shows another one process at the time of making a packaging box into a 2nd sealing state. The perspective view which shows the packaging box of a 2nd sealing state. The perspective view which shows the modification of a packaging box. The perspective view which shows the other modification of a packaging box.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 5C show a packaging box 10 according to an embodiment of the present invention. As shown in FIG. 1, the packaging box 10 includes a square cylindrical outer peripheral portion 12, a lower lid portion 18 that closes a lower end opening of the outer peripheral portion 12, and an upper lid portion 27 that closes an upper end opening of the outer peripheral portion 12. It is a general-purpose case. This packaging box 10 corresponds to the article to be accommodated in one of the first sealed state shown in FIG. 4B and the second sealed state shown in FIG. 5C whose overall height is lower than the first sealed state (the internal volume is small). And sealed.

(Outline of the packaging box)
The packaging box 10 is formed by bending and fixing a single blank shown in FIG. 2 at a predetermined site. The blank is formed by punching a paper cardboard sheet using a known paper punching device. The corrugated cardboard sheet has a configuration in which wavy shin is disposed between the front liner (the outer surface of the packaging box 10) and the back liner (the inner surface of the packaging box 10). A one-dot chain line in FIG. 2 is a general ruled line formed by putting a rule from the back liner so as to compress the thickness. A two-dot chain line in FIG. 2 is a reverse ruled line formed by ruled from the front liner so as to compress the wall thickness. The solid line in FIG. 2 is a cutting line formed by inserting a blade from the back liner to the front liner, and a shape line (side) by punching.

  In the following description, the direction in which the end plates 13 and 13 of the outer peripheral portion 12 face each other is referred to as the X direction, the direction in which the side plates 14 and 14 of the outer peripheral portion 12 face each other is referred to as the Y direction, and the lower lid portion 18 and the upper lid portion 27. The direction in which is opposed is called the Z direction. The packaging box 10 of the present embodiment is formed such that the dimension in the X direction is longer than the dimension in the Y direction, but the dimension in the Y direction may be longer than the dimension in the X direction, and the X direction and the Y direction may be formed. The dimensions in the direction may be the same.

  As shown in FIG. 1, the outer peripheral portion 12 includes a pair of end plates (first side plates) 13 and 13 and a pair of side plates (second side plates) 14 and 14. The end plates 13 and 13 have substantially the same quadrangular shape in which the dimension in the Y direction is longer than the dimension in the Z direction. The side plates 14 and 14 have substantially the same rectangular shape in which the dimension in the X direction is longer than the dimension in the Z direction. The side plates 14 and 14 are relatively bent in a direction orthogonal to the end plates 13 and 13.

  Referring to FIG. 2, the end plate 13 and the side plate 14 are alternately arranged from the right side to the left side via a folding line 16. A sticking plate 15 is connected to the side plate 14 located at the left end of FIG. The sticking plate 15 is stuck to the inner surface (back liner) of the end plate 13 located at the right end in FIG. 2 by, for example, a vinyl acetate emulsion adhesive. The portion where the folding line 16 is formed is the first side of the end plate 13. The folding line 16 is formed of a general ruled line and extends in the Z direction in the assembled state of FIG.

  Referring to FIG. 4B together with FIG. 2, the lower lid portion 18 and the upper lid portion 27 have substantially the same rectangular shape in which the dimension in the X direction is longer than the dimension in the Y direction.

  Referring to FIG. 1 together with FIG. 2, the lower lid portion 18 includes a pair of first flaps 19, 19 and a pair of second flaps 21, 21. The first flap 19 has a generally trapezoidal shape with a lateral width gradually narrowing toward the tip (the lower end in FIG. 2), and is connected to the lower side of the end plate 13 via a folding line 20 formed of a general ruled line. The second flap 21 has a substantially quadrangular shape, and is continuous with the lower side of the side plate 14 via a folding line 22 formed of a general-purpose ruled line. On one side of the second flap 21 in the lateral direction (right side in FIG. 2), an attaching portion 23 attached to the adjacent first flap 19 is partitioned by a folding line 24 formed of a reverse ruled line. In addition, engagement grooves 25 and 25 that are engaged with each other in an assembled state are provided at the center of the tip of the second flaps 21 and 21.

  The first flap 19 is overlapped on the inner surface side of the end plate 13 by being folded along the folding line 20. The second flap 21 is overlapped on the inner surface side of the side plate 14 by being mountain-folded along the folding line 22. The sticking part 23 is valley-folded along the folding line 24. In this state, the side plate 14 is bent with respect to the left end plate 13 in FIG. 2, and the end plate 13 is bent with respect to the right side plate 14 in FIG. Affixed. When the outer peripheral part 12 is expanded in the shape of a square cylinder, the attached first flap 19 and second flap 21 rotate downward with respect to the end plate 13 and the side plate 14 by pulling each other. The engaging grooves 25 and 25 of the second flaps 21 and 21 are engaged with each other, whereby the lower end opening of the outer peripheral portion 12 is closed by the lower lid portion 18.

  Subsequently, referring to FIG. 1 together with FIG. 2, the upper lid portion 27 includes a pair of inner flaps (first lid plates) 28, 28 and a pair of outer flaps (second lid plates) 29, 29. The inner flap 28 has a substantially quadrangular shape and is connected to the upper side (second side) of the end plate 13. The outer flap 29 has a substantially quadrangular shape and is connected to the upper side (third side) of the side plate 14.

(Rule structure for sealing at the top opening)
The end plate 13 and the side plate 14 have a folding line (first folding line) 30 for the first sealed state shown in FIG. 4B and a folding line (second folded) for the second sealed state shown in FIG. 5C. Curve) 32. Moreover, the rupture part 34 for setting it into a 2nd sealing state is provided in the ridge part between the end plate 13 and the side plate 14. FIG.

  As shown in FIGS. 1 and 2, the fold line (first fold line) 30 is composed of general-purpose ruled lines, and the upper side (second side) of the end plates 13 and 13 and the upper side (third side) of the side plates 14 and 14. And are provided in a straight line. The folding line 30 is also provided on the sticking plate 15. The total length of the folding line 30 is shorter than the lateral width of the end plate 13, the side plate 14, and the sticking plate 15 to be formed. That is, the end of the folding line 30 formed on the end plate 13 and the end of the folding line 30 formed on the side plate 14 are located at a predetermined interval. This distance is the same as the width of the slit 36 that partitions the inner flap 28 and the outer flap 29. However, the folding line 30 may be composed of one continuous general-purpose ruled line without a gap.

  A fold line (second fold line) 32 is for bending the end cover 13 and the side cover 14 on the upper lid portion 27 side. The folding line 32 is provided at a predetermined interval (for example, 40 mm) on the lower lid portion 18 side of the folding line 30. An interval (for example, 20 mm) between the folding line 20 and the folding line 32 on the lower lid portion 18 side of the end plate 13 is set to be equal to or less than half (that is, 30 mm) of the total height (for example, 60 mm) of the end plate 13 in the Z direction. The folding line 32 is also provided on the sticking plate 15. The folding line 32 formed on the end plate 13 is composed of a plurality of (three in the present embodiment) general-purpose ruled lines that are located at a predetermined interval A. The folding line 32 formed on the side plate 14 is composed of a plurality of (three in this embodiment) general-purpose ruled lines that are located at a predetermined interval B. The folding line 32 formed in the sticking board 15 consists of one general ruled line. An interval A between the folding lines 32 and 32 of the end plate 13 and an interval B between the folding lines 32 and 32 of the side plate 14 are the same (A = B).

  The end on the side plate 14 side of the folding line 32 formed on the end plate 13 and the sticking plate 15 is disposed on the folding line 16, but may be disposed at a distance from the folding line 16. The end of the folding line 32 formed on the side plate 14 on the end plate 13 side (the sticking plate 15 side) is arranged with a gap C defined with respect to the folding line 16. This interval C is a dimension setting obtained by adding the interval A or B between the folding lines 32, 32 and the overall length L (see FIG. 3) in the lateral direction of a cut portion 43 described later. However, the folding line 32 may be constituted by one continuous general-purpose ruled line without leaving the intervals A and B.

  The breaking portion 34 is for breaking the ridge portion (first side) of the end plate 13 (sticking plate 15) and the side plate 14, and is provided from the folding line 30 to the folding line 32 along the ridge portion. Yes. The fracture | rupture part 34 is comprised by the piece zipper provided with the several 1st cutting line provided in the shape of perforation at intervals, and the 2nd cutting line extended inclining from the edge of the 1st cutting line. The second cutting line is inclined toward the end plate 13 (sticking plate 15) from the end on the upper lid portion 27 side of the first cutting line toward the upper lid portion 27.

  The end of the broken portion 34 on the folding line 30 side intersects with the folding line 30, but may be arranged with a gap from the folding line 30. The end of the breaking portion 34 on the folding line 32 side is arranged with a space from the folding line 32, but may be arranged on the folding line 32. In the present embodiment, the folding line 16 is not provided in the portion where the fracture portion 34 is formed.

  As most clearly shown in FIG. 1, the packaging box 10 has a Z-direction of the outer peripheral portion 12 that is larger than the projecting dimension of the flaps 28 and 29, that is, the dimension from the folding line 30 to the tips of the flaps 28 and 29 (for example, 123 mm). The overall height is short (less than half) flat shape. When the blank of the packaging box 10 is processed, the flaps 28 and 29 are moved together with the punching blade for punching the slit 36 when separating the punching die, so that it is difficult to separate the blank from the punching die. is there. In order to prevent this problem and improve workability, two ends of the four slits 36 are formed on the folding line 30 and the remaining two ends are formed on the folding line 30. On the other hand, it is formed so as to be spaced upward.

  In the packaging box 10 thus configured, a part of the inner flap 28 and the outer flap 29 located on the left side in FIG. 2 are continuous, and a part of the inner flap 28 and the outer flap 29 located on the right side in FIG. ing. Therefore, the workability of the blank can be improved. In the present embodiment, the breakage portion 34 is also extended at the continuous portion of the inner flap 28 and the outer flap 29. That is, a part of the inner flap 28 and the outer flap 29 are continuous via the extended portion 34 a of the fracture portion 34.

  When the packaging box 10 is in the first sealed state, as shown in FIG. 4A from the state shown in FIG. 1, the inner flap 28 is bent along the folding line 30, and the extending part 34 a of the breaking part 34 is folded at the folding line 30. Breaks through. Next, the outer flap 29 is bent along the folding line 30. Thereby, as shown to FIG. 4B, it can seal in the 1st sealing state which faced | matched the front-end | tip of a pair of outer flaps 29 and 29. FIG. In the present embodiment, the projecting dimensions of the outer flaps 29 and 29 are made larger than half the dimension of the end plate 13 in the Y direction, and the cutout portions 38 and 38 formed in both are matched.

  When the packaging box 10 is in the second sealed state, as shown in FIG. 5B from the state shown in FIG. 1, the inner flap 28 is bent along the folding line 32 and the breaking portion 34 is broken along the folding line 32. In the present embodiment, the dimension from the folding line 32 to the tip of the inner flap 29 is made larger than half of the dimension of the side plate 14 in the X direction, and the tips of each other are in contact with each other. And it is comprised so that the latching convex part 40 provided in one among the pair of inner flaps 29 and 29 may latch into the latching recessed part 41 provided in the other (locking part). Next, the outer flap 29 is bent along the folding line 32. Thereby, as shown to FIG. 5C, it can seal in the 2nd sealing state which made the front-end | tip of a pair of outer flaps 29 and 29 overlap.

  When the break along the break line 34 is performed by holding the inner flap 28 with one hand and the outer flap 29 with the other hand, the outer peripheral portion 12 becomes excessive beyond the target folding line 30 or 32. May break. This problem can be prevented by bending the inner flap 28 along the folding line 30 or operating the inner flap 28 side of the end plate 13 along the folding line 32.

  However, when the second sealing state is set, the folding line 32 is close to the folding line 20 between the end plate 13 and the lower lid portion 18, so that it is difficult to bend the end plate 13 along the folding line 32. . That is, even if it is going to bend the end plate 13 along the fold line 32, as shown to FIG. 5A, the end plate 13 bends along the fold line 20 which has already been creased. In this case, beyond the end of the breaking portion 34 located on the lower lid portion 18 side, the ridge portion (folding curve 16) of the end plate 13 and the side plate 14 is broken, and the packaging box 10 does not hold.

(Excessive break prevention structure)
In order to prevent excessive breakage beyond the end of the breakage portion 34 and improve breakage operability along the breakage portion 34, the outer peripheral portion 12 is provided with a cut portion 43 and an auxiliary folding curve 46.

  As shown in FIGS. 1 and 3, the cut portion 43 is provided on the folding line 32 from the broken portion 34 side toward the center side of the side plate 14. The cut portion 43 is composed of two or more cut lines formed with a predetermined interval S (non-cut portion). A continuous portion 44 made of a curved cutting line is provided on the cut portion 43 side of the cut portion 34. The end of the continuous portion 44 is disposed at the end of the fracture portion 34. The continuous portion 44 may be regarded as a part of the cut portion 43 or may be regarded as a portion of the fracture portion 34.

  If the total length L of the cut portion 43 including the continuous portion 44 and the non-cut portion is excessively long (for example, 50 mm), the cut edge of the cut portion 43 is bent in the second sealed state, so that the appearance is deteriorated. . Therefore, the total length L of the cut portion 43 is set within 30 mm. Further, if the total length L is excessively shortened (for example, 5 mm), it becomes impossible to stop the fracture of the fracture portion 34. Therefore, the total length L of the cut portion 43 is set to 8 mm or more. And the full length L of the notch part 43 of this embodiment is set to 20 mm which is the same as the dimension from the folding line 20 to the folding line 32.

  The auxiliary folding line 46 is provided on the side plate 14 to prevent breakage along the folding line 16 when the end plate 13 is bent along the folding line 20 after the breaking part 34 is broken. The auxiliary folding line 46 is formed of a general-purpose ruled line, and is inclined from the corner where the folding line 20 and the folding line 22 intersect toward the incision part 43. In the present embodiment, since it is inclined at an angle of 45 degrees with respect to the folding line 22, one end of the auxiliary folding line 46 is located at the edge of the slit 36, and the other end of the auxiliary folding line 46 is the notch 43. Located at the inner edge. However, one end of the auxiliary folding curve 46 may be arranged with a gap from the slit 36, and the other end of the auxiliary folding curve 46 may be arranged with a gap from the cut portion 43.

  When making this packaging box 10 into a 2nd sealing state, the inner flap 28 side (end plate upper part 13a) of the end plate 13 is pushed inward. Then, the end plate 13 bends along the folding line 20, and the breakage of the breakage portion 34 proceeds toward the lower lid portion 18. As shown in FIG. 5A, when the breakage of the breakage portion 34 reaches the end on the lower lid portion 18 side, the force due to the operation escapes to the cutout portion 43, and the uncut portion of the cutout portion 43 is broken. A part of the side plate 14 surrounded by the auxiliary folding line 46, the cut-in part 43, and the folding line 16 is bent, and the inner flap 28 and the end plate 13 are bent to a position where they overlap the lower lid part 18. Thereby, the breakage of the folding line 16 beyond the folding line 32 can be reliably prevented.

  Next, as shown in FIG. 5B, the end plate lower portion 13 b is supported, and the end plate upper portion 13 a is moved outward in the X direction so that the end plate lower portion 13 b is positioned in the orthogonal direction with respect to the lower lid portion 18. The end plate 13 is mountain-folded along the folding line 32. Then, one locking projection 40 of the inner flaps 28, 28 is locked to the other locking recess 41. Thereby, the state which bent the end-plate lower part 13b with respect to the lower cover part 18 at the angle of 90 degree | times can be hold | maintained.

  Thereafter, as shown in FIG. 5C, the side plate upper portion 14a is folded inward along the folding line 32 along with the outer flap 29 by pushing the side plate upper portion 14a inward, and the upper end of the outer peripheral portion 12 is closed. Sealed.

  As described above, since the side plate 14 is provided with the cut portion 43, the break along the broken portion 34 is guided to the cut portion 43 when reaching the end of the broken portion 34, and along the auxiliary folding curve 46. It stops when a part of the side plate 14 is bent. Accordingly, it is possible to prevent the end plate 13 and the side plate 14 from being excessively broken beyond the folding line 32 that is the target position, and not becoming a packaging box 10. Moreover, when it is set as the 2nd sealing state, since it is not necessary to fracture | rupture carefully along the fracture | rupture part 34, workability | operativity can be improved.

  Moreover, since the lower cover part 21, the end plate lower part 13b, and the upper cover part 27 can be respectively held in the intersecting directions by the engagement of the engagement convex part 40 and the engagement concave part 41, the packaging box 10 in the second sealed state is provided. Can improve the appearance. Furthermore, since the cutting part 43 consists of two or more cutting lines, the workability at the time of punching the blank of the packaging box 10 can be improved. In addition, since it is possible to prevent the sag in the first sealed state, it is possible to prevent dust from entering the inside of the packaging box 10 from the inside and the appearance of the packaging box 10 from being damaged.

  In addition, the packaging box 10 of this invention is not limited to the structure of the said embodiment, A various change is possible.

  For example, the locking structure of the inner flaps 28 when the second sealed state is set may be as shown in FIGS. In FIG. 6, a pair of locking grooves 48, 48 are provided at the tip of the inner flap 28, and the locking grooves 48, 48 of one inner flap 28 are engaged with the locking grooves 48, 48 of the other inner flap 28. By stopping, the end plate upper portion 13a and the inner flap 28 are held in a bent state with respect to the end plate lower portion 13b. In FIG. 7, one locking groove 48 at the center of the front end of the inner flap 28 is provided, and the locking groove 48 of one inner flap 28 is locked to the locking groove 48 of the other inner flap 28. The end plate upper portion 13a and the inner flap 28 are held in a bent state with respect to the end plate lower portion 13b. Moreover, it is good also as a structure which abuts the front-end | tips of a pair of inner flaps 28 and 28, without providing a latching | locking part.

  The breakage part 34 and the cut part 43 may be crossed without the continuous part 44 being provided in the cut part 43 by positioning the end of the break part 34 on the folding line 32. Moreover, the end of the breakage part 34 and the end of the notch part 43 may be arranged with an interval, or may be arranged on the same point.

  Although the cut portion 43 is formed linearly on the folding line 32, it may be inclined toward the upper lid 27 side or inclined toward the lower lid portion 18 side with respect to the folding line 32. In this case, the inclination angle with respect to the folding line 32 is preferably within 15 degrees. Moreover, you may provide the cut part 43 in parallel with the folding line 32 at intervals.

  The incision portion 43 is constituted by two cutting lines formed with an interval S (non-cutting portion), but may be constituted by one cutting line without providing the non-cutting portion. You may comprise by more than one cutting line. Moreover, you may comprise the notch part 43 by the one piece zipper similar to the fracture | rupture part 34. FIG. In this case, the second cutting line may be provided so as to extend toward the upper lid portion 27 or may be provided so as to extend toward the lower lid portion 18.

  The shape of the cut portion 43 may not be linear. That is, two cutting lines may be provided at intervals in the Z direction, may be an arc shape protruding toward the upper lid portion 27 side, or may be an arc shape protruding toward the lower lid portion 18 side. Further, the cut portion 43 may be provided with a break portion formed of an arcuate (C-shaped) cutting line at the inner end located on the opposite side to the break portion 34.

  In the packaging box 10, the flap 29 having a long lateral width in the X direction may be used as an inner flap (first lid plate), and the flap 28 having a short lateral width in the Y direction may be used as an outer flap (second lid plate). In this case, it is preferable to provide the cut portion 43 and the auxiliary folding curve 46 on the end plate 13. Further, the cut portion 43 and the auxiliary folding curve 46 may be provided on both the end plate 13 and the side plate 14.

  The lower lid portion 18 is not limited to the one-touch type that is closed by expanding the outer peripheral portion 12, and may be configured by an inner flap and an outer flap similar to the upper lid portion 27, and can be changed as necessary.

  The material of the packaging box 10 is not limited to a paper cardboard sheet, and may be a resin cardboard sheet. The material of the packaging box 10 is not limited to a corrugated cardboard sheet, and may be a single layer cardboard or a resin sheet.

DESCRIPTION OF SYMBOLS 10 ... Packaging box 12 ... Outer peripheral part 13 ... End plate (1st side plate)
13a ... End plate upper part 13b ... End plate lower part 14 ... Side plate (second side plate)
14a ... Upper side plate 14b ... Lower side plate 15 ... Adhering plate 16 ... Folding curve (first side)
DESCRIPTION OF SYMBOLS 18 ... Lower lid part 19 ... 1st flap 20 ... Folding curve 21 ... 2nd flap 22 ... Folding curve 23 ... Adhering part 24 ... Folding curve 25 ... Engaging groove 27 ... Upper lid part 28 ... Inner flap (1st lid plate) )
29 ... Outer flap (second cover plate)
30 ... fold curve (first fold curve)
32 ... Folding curve (second folding curve)
34 ... Breaking part 34a ... Extension part 36 ... Slit 38 ... Notch part 40 ... Locking convex part 41 ... Locking concave part 43 ... Notch part 44 ... Continuous part 46 ... Auxiliary folding curve 48 ... Locking groove

Claims (7)

A first side plate;
A second side plate connected to the first side of the first side plate and bent with respect to the first side plate;
A first lid plate that is connected to a second side that intersects the first side of the first side plate and is bent in the same direction as the second side plate with respect to the first side plate;
A second lid plate connected to the third side of the second side plate intersecting the second side of the first side plate and bent with respect to the second side plate so as to overlap the first lid plate;
A first folding line provided on the second side of the first side plate and on the third side of the second side plate for folding the first lid plate and the second lid plate;
Provided on the first side plate and the second side plate so as to be spaced from the first folding line, the first lid plate side of the first side plate and the second lid plate side of the second side plate A second folding line for bending
A rupture portion provided on the first side of the first side plate from the first fold line side toward the second fold line, for breaking between the first side plate and the second side plate;
A packaging box comprising: a cut portion provided in the first side plate or the second side plate so as to extend along the second folding line from the broken portion side.   2. The packaging box according to claim 1, wherein the cut portion includes two or more cut lines provided at intervals along the second folding line.   From the corner side where the side of the first side plate located opposite to the first lid plate and the side of the second side plate located opposite to the second lid plate intersect, toward the notch The packaging box according to claim 1, wherein an auxiliary folding curve is provided. The first cover plate is an inner flap that is bent before the second cover plate;
The packaging box according to any one of claims 1 to 3, wherein the cut portion is provided on the second side plate. The first side plate and the first lid plate are provided in a pair at opposing positions,
The dimension from the second fold curve to the tip of the first lid plate is a dimension that the tips of the pair of first lid plates abut in a state where the pair of first side plates are bent along the second fold curve. Yes,
The packaging box of any one of Claim 1 to 4 in which the latching | locking part latched mutually is provided in the front-end | tip of a pair of said 1st cover board.   The packaging box according to any one of claims 1 to 5, wherein an interval between a side of the first side plate that is opposite to the first cover plate and the second folding line is 30 mm or less. The first side plate and the first cover plate are provided in a pair at opposing positions,
The second side plate and the second cover plate are provided in a pair at opposing positions,
The at least 1 place between the said 1st cover plates and the said 2nd cover plates of four places is continuing through the said fracture | rupture part extended, The any one of Claim 1 to 6 Packaging box.

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