JP5370847B2 - Cardboard packaging box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packing box made of cardboard, which is capable of stably stacking the packing box having excellent compression strength, protecting a print on a sidewall, and opening and locking a top wall by a locking piece without any trouble. <P>SOLUTION: In the packing box made of cardboard, the sidewall 1 and an end wall 2 are provided continuously through a corner section, and a bottom wall 3 and the top wall 4 are provided continuously to the sidewall 1 and the end wall 2, a ruled line 8, forming a border between the sidewall 1, the bottom wall 3, and the top wall 4, is provided with horizontal straight portions 8a, 8b in position near to both ends and at the intermediate, and provided with an inclined portion 8c inclined toward the center side of the sidewall 1 between the horizontal straight portion 8a at both the ends and the horizontal straight portion 8b at the intermediate, so that the length of the horizontal straight portion 8a at both the end sides is set to be greater than 1/2 of the width of end wall 2. When the locking piece 10 is formed by drawing two cut lines intersecting at the horizontal straight portion 8b at the intermediate to open the top wall 4 and to bend the locking piece 10, the top wall 4 is locked in an open state. A flat horizontal surface part is formed at both the ends of the bottom wall 3 and the top wall 4, so that the packing box made of cardboard can be stacked stably. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a cardboard packaging box in which upper and lower ruled lines are bent to improve pressure resistance.

  Conventionally, as a cardboard packaging box of this type, in Patent Document 1 below, as shown in FIG. 7, a side wall 51 and an end wall 52 are connected to each other through a corner portion, and an inner flap 56 and an outer flap are connected thereto. The bottom wall 53 and the top wall 54 made up of 57 are connected to each other, and the ruled line 55 that is the boundary between the side wall 51 and the outer flap 57 is inclined in a V shape toward the center side of the side wall 51. .

  In this packaging box, in the bottom wall 53 and the top wall 54, the middle part of the ridge line with the side wall 51 is recessed in the longitudinal direction, and a large load is applied to the corner part having higher strength than the middle part in the longitudinal direction of the side wall 51. Therefore, even when heavy objects are stored and stacked, deformation such as swelling of the trunk can be prevented.

JP 2007-39090 A

  However, in the packaging box as described above, when the upper and lower packaging boxes are shifted during stacking, the stacked state may become unstable.

  In addition, the side walls 51 of the packaging boxes arranged side by side rub against each other at the middle portion in the longitudinal direction with the linear portion in the up and down direction, and the printing of the portion may be peeled off.

Therefore, the invention can be stacked excellent packaging box in pressure strength stably, it is an object to ensure that the side wall of the printing is protected.

In order to solve the above problems, the present invention provides a cardboard packaging box in which a side wall and an end wall are connected via a corner portion, and a bottom wall and a top wall are connected to the side wall, the end wall, and the top wall. The ruled line that forms the boundary with the wall is provided with horizontal straight lines near both ends and in the middle, and between the horizontal straight lines on both ends and the intermediate horizontal straight lines, the inclined part inclined toward the center of the side wall is the bottom. Provided so that the position of the wall side corresponds to the position of the top wall side, and assembling, a flat horizontal surface portion is formed at both ends of the bottom wall and the top wall by the horizontal straight line portion of the ruled line. A flat horizontal plane portion is also formed in the intermediate portion by the horizontal straight line portion of the ruled line, and the intermediate portion of the bottom wall and the top wall is recessed by the inclined portion of the ruled line .

  Further, the length of the horizontal straight line portion on both ends of the ruled line is set to a dimension larger than ½ of the width of the end wall.

  In the cardboard packaging box according to the present invention, flat horizontal surface portions are formed at both ends of the bottom wall and the top wall, and the middle portion of the bottom wall and the top wall is recessed. Place the horizontal plane part at the bottom wall end of the upper packaging box on the horizontal plane part at the top wall end of the lower packaging box, and load it stably, while ensuring excellent pressure resistance. Can do.

  Furthermore, by setting the length of the horizontal straight line portion on both ends of the ruled line to a dimension larger than ½ of the width of the end wall, the longitudinal direction is alternately twisted at right angles for each step and stacked. In addition, the majority of the bottom wall of the upper packaging box is placed on the horizontal surface of the top wall end of the lower packaging box, and can be stably stacked.

  In addition, since a flat vertical surface portion is formed in the middle portion in the longitudinal direction of the side wall, even if the packaging boxes are placed side by side, the side walls rub against each other in a linear manner in the middle portion in the longitudinal direction. The phenomenon that the printing is peeled off is prevented.

The figure which shows the assembly state of the cardboard packaging box which concerns on this invention Figure showing the same blank as above The perspective view which shows the normal stacked state of a packaging box same as the above The perspective view which shows the same state as the above Same as above The top view same as the above The perspective view which shows an open lock state A perspective view showing a conventional cardboard packaging box with improved pressure resistance

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  The corrugated packaging box shown in FIG. 1 has a rectangular parallelepiped shape in which a pair of side walls 1 and end walls 2 are connected to each other through a corner portion, and a bottom wall 3 and a top wall 4 are connected to these. The lateral direction of the side wall 1 is the longitudinal direction, and the lateral direction of the end wall 2 is the width direction.

  In the blank shown in FIG. 2 in which the packaging box is developed, the side wall 1, the bottom wall 3, the side wall 1, the top wall 4, and the passage piece 5 are connected to each other along the long side, and the inner flap 6 is provided on the short side of the side wall 1. The outer flaps 7 are connected to the short sides of the bottom wall 3 and the top wall 4 as members that form the end walls 2, respectively.

  The ruled line 8 serving as a boundary between the side wall 1 and the bottom wall 3 and the top wall 4 is provided with horizontal straight portions 8a and 8b near both ends and in the middle thereof, and the horizontal straight portions 8a and 8b between the both ends. Is provided with an inclined portion 8c inclined toward the center of the side wall 1. Further, the ruled line 8 that becomes the boundary between the top wall 4 and the passage piece 5 is also configured to be the same as the other ruled lines 8.

  On the long side which is the open edge of one side wall 1, horizontal straight lines 1 a and 1 b are provided near the both ends and in the middle corresponding to the ruled line 8. Between the portion 1b, an inclined portion 1c inclined toward the center side of the side wall 1 is provided.

  The top wall 4 is provided with a zipper-type cut line 9 in which ridge-shaped cuts are interrupted for opening, and the cut line 9 includes a V-shaped part slightly separated from the boundary with the outer flap 7, It is comprised from the vertical part extended in the direction of the side wall 1 and the passage piece 5 from both ends. At the center of the V-shaped part of the score line 9, a finger insertion part 9a is provided by cutting.

  A lock piece 10 is formed at the ridge between the side wall 1 and the top wall 4 with two cut lines intersecting the horizontal straight line portion 8b in the middle of the ruled line 8. The lock piece 10 includes a side wall portion 10a and a top wall portion 10b. The side wall portion 10a is tapered so that both side edges protrude, and the base portion is constricted. A ruled line is formed at the base end of the top wall portion 10b.

  When assembling such a blank in the form shown in FIG. 1 and packaging an article, the pair of side walls 1, the bottom wall 3 and the top wall 4 are bent along the ruled line 8 to form a square tube, The piece 5 is affixed to the opposite side wall 1 to wrap the article, and the inner flap 6 and the outer flap 7 are sequentially folded and bonded to form the end wall 2.

  In the cardboard packaging box as described above, a flat horizontal surface portion is formed at both ends of the bottom wall 3 and the top wall 4 by the horizontal straight portions 8 a of the ruled lines 8, and between the bottom wall 3 and the top wall 4. In addition, a flat horizontal surface portion is formed by the horizontal straight line portion 8 b of the ruled line 8, and the intermediate portion of the bottom wall 3 and the top wall 4 is recessed by the inclined portion 8 c of the ruled line 8.

  For this reason, as shown in FIG. 3, during normal stacking in which a plurality of packaging boxes are stacked with the longitudinal direction aligned, a load is applied to the corner portion to ensure excellent compressive strength while lower packaging. By placing the horizontal plane portions at both ends of the bottom wall 3 of the upper packaging box on the horizontal plane portions at both ends of the top wall 4 of the box, the boxes can be stably stacked.

  Further, as shown in FIG. 4, even when the packaging box is twisted and piled up alternately at right angles for each step, as shown in FIG. Is set to a dimension larger than ½ of the width W of the end wall 2, so that the bottom wall of the upper packaging box is placed on the horizontal surface portion of the top wall 4 of the lower packaging box. Since the majority of 3 is loaded, it can be stably stacked.

  Further, since a flat vertical surface portion is formed by the horizontal straight line portion 8b of the ruled line 8 in the middle portion of the side wall 1 in the longitudinal direction, the conventional V shown in FIG. Like a packaging box with character-shaped ruled lines, the side walls 1 do not rub against each other linearly at the middle in the longitudinal direction, and the phenomenon in which the printing at that part is peeled off does not occur.

  And when taking out articles | goods from this packaging box, as shown in FIG. 6, the finger insertion part 9a is pushed in, the cut line 9 is cut | disconnected, the ruled line 8 is used as a hinge, and the part inside the cut line 9 of the top wall 4 , The incised portion of the top wall 4 is folded back so as to overlap the outer surface of the side wall 1, the lock piece 10 is folded outward, and the overhanging portions on both sides of the side wall portion 10a are engaged with the extracted traces of the top wall portion 10b. Let

  At this time, since the lock piece 10 is provided in the horizontal straight line portion 8b, the side wall portion 10a and the top wall portion 10b overlap with each other without shifting, and the incised portion of the top wall 4 is securely locked in the open state. Can be taken out easily.

  In the above embodiment, the inclined portion 8c of the ruled line 8 is exemplified as a straight line in the oblique direction, but the inclined portion 8c may be curved in an arc shape.

  Moreover, although the wrap round type thing was illustrated as a form of a packaging box, each pair of side wall and end wall are connected, and a bottom wall and a top wall are attached by the inner flap and the outer flap which were connected to the upper end and the lower end. The same configuration can be applied to a normal grooving cardboard box to be formed.

  Moreover, although the rectangular parallelepiped packaging box was illustrated, the same structure can be applied also to the packaging box in which the corner portion is chamfered and the outer periphery has an octagonal cylindrical shape.

DESCRIPTION OF SYMBOLS 1 Side wall 1a, 1b Horizontal straight part 1c Inclination part 2 End wall 3 Bottom wall 4 Top wall 5 Passage piece 6 Inner flap 7 Outer flap 8 Ruled line 8a, 8b Horizontal straight part 8c Inclination part 9 Cut line 9a Finger insertion part 10 Lock piece 10a Side wall 10b Top wall

Claims (2)

In a cardboard packaging box in which a side wall (1) and an end wall (2) are connected via a corner portion, and a bottom wall (3) and a top wall (4) are connected to the side wall (1), the side wall (1) and The ruled line (8), which is the boundary between the bottom wall (3) and the top wall (4), is provided with horizontal straight portions (8a, 8b) near both ends and in the middle, with the horizontal straight portions (8a) on both ends. An inclined part (8c) inclined to the center side of the side wall (1) is provided between the middle horizontal straight part (8b) so that the positions of the bottom wall (3) side and the top wall (4) side correspond to each other. As a result of the assembly, a flat horizontal surface portion is formed at both ends of the bottom wall (3) and the top wall (4) by the horizontal straight portion (8a) of the ruled line (8), and the bottom wall (3) and the top wall A flat horizontal surface portion is also formed in the middle portion of (4) by the horizontal straight portion (8b) of the ruled line (8), and the bottom wall (3) and the top are formed by the inclined portion (8c) of the ruled line (8). A cardboard packaging box, characterized in that the middle part of the wall (4) is recessed . 2. The cardboard according to claim 1, wherein the length of the horizontal straight line portion ( 8a ) on both ends of the ruled line ( 8 ) is set to a dimension larger than ½ of the width of the end wall (2). Packaging box.

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