JP2011251738A - Packing case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packing case which can secure the size of an opening largely and also has large strength against load weight.SOLUTION: The packing case 1 has a box body 2 formed of a corrugated board. The box body 2 has a bottom wall 4, first and second top walls 9, 10 opposing to the bottom wall 4 and a pair of first and second side walls 5, 6 reaching peripheral edges of the first and the second top walls 9, 10 from the peripheral edge of the bottom wall 4 and opposing to each other. The box body 2 has an opening 3 formed. The outer edge of the opening 3 is formed of first and second sides formed of a middle part 42c and 43c of upper end sides 42, 43 of the first and the second side wall 5, 6 and third and fourth sides formed of end sides 46, 47 of the first and the second top walls 9, 10. Two or more corrugated boards are lapped to be adhered by cementing a first and second lapping pieces 11, 12 in the range along the first and the second side of the opening 3 in the first and the second side wall 5, 6.

Description

  The present invention relates to a packaging case formed from corrugated paperboard.

  A case made of PET (Polyethylene Terephthalate) (hereinafter referred to as PET case) is used as a case for packing a long object such as a straight tube fluorescent lamp. Since PET is a transparent material, the contents of the PET case can be visually recognized from the outside. For this reason, the PET case is used not only for the purpose of transporting and storing the contents, but also for displaying the contents.

  In addition, a case assembled from corrugated paperboard (hereinafter referred to as a corrugated cardboard case) is used as a case for packing food, cosmetics, and the like. Since corrugated paperboard is not transparent like PET, the range of contents covered by corrugated paperboard is not visible from the outside.

  Patent Documents 1 and 2 disclose a cardboard case used for display of contents by providing an opening so that the contents can be visually recognized. These cardboard cases have a rectangular parallelepiped shape and have an opening on the top surface. The opening is formed by hollowing out the center of the corrugated paperboard constituting the top surface.

JP-A-8-85568 Japanese Patent Laid-Open No. 11-171171

  The PET case has a low strength against a load. For this reason, when PET cases are stacked and a straight tube fluorescent lamp is transported or stored, the PET case is deformed, and the straight tube fluorescent lamp is damaged. In order to solve this problem, it is conceivable to secure a large gap between the case wall surface and the contents. However, when this measure is taken, the number of PET cases that can be mounted on the vehicle is reduced by increasing the volume of the PET case. For this reason, the transportation frequency by a vehicle increases and the problem which the discharge amount of CO2 increases may arise.

  In Patent Documents 1 and 2, since the corrugated paperboard constituting the top surface is provided around the entire periphery of the opening, it is difficult to ensure a large opening size when the width of the cardboard case is small. In addition, in order to solve this problem, when a measure is taken to simply omit the corrugated paperboard around the opening, the strength of the corrugated cardboard case is reduced and the corrugated cardboard case is likely to be deformed.

  The present invention has been made in view of such circumstances, and is a packaging case formed from corrugated paperboard, which can ensure a large opening size and provides a packaging case with high strength against a load. Objective.

In order to achieve the above object, a packaging case according to the present invention comprises a bottom wall formed from corrugated paperboard, a top wall facing the bottom wall, and a side wall reaching from the periphery of the bottom wall to the periphery of the top wall. And
A pair of opposite side wall ends among the side walls and an opening with the top wall end as an outer edge are formed,
In the range along the outer edge of the opening, the pair of side walls are stacked with a plurality of the corrugated paperboards.
It is characterized by that.

  According to the present invention, the openings are formed with the ends of the pair of side walls facing each other and the ends of the top wall as outer edges, so that the corrugated paperboard is disposed outside the openings in the direction in which the pair of side walls face each other. not exist. For this reason, even when the width of the box is narrow, a large opening dimension can be secured. Further, the rigidity of the pair of side walls is increased by overlapping a plurality of cardboard paperboards in a range along the outer edge of the opening. For this reason, when a packaging case is installed so that a pair of side walls may extend in the up-down direction, the packaging case has a high strength against a load.

It is a perspective view which shows the packaging case concerning Embodiment 1 of this invention. FIG. 3 is a development view of the corrugated cardboard constituting the packaging case of the first embodiment. FIG. 6 is a plan view showing a procedure for assembling the packaging case of the first embodiment. FIG. 5 is a cross-sectional view showing a procedure for assembling the packaging case of the first embodiment. It is sectional drawing which shows the part in which the crease line was formed. It is a perspective view which shows the packaging case concerning Embodiment 2 of this invention. FIG. 6 is a development view of corrugated paperboard constituting the packaging case of the second embodiment. It is a perspective view which shows the packaging case 1 concerning Embodiment 3 of this invention. FIG. 6 is a development view of corrugated paperboard constituting the packaging case of the third embodiment. FIG. 10 is a plan view showing a procedure for assembling the packaging case of the third embodiment. It is a perspective view which shows the modification of this invention. It is a perspective view which shows the modification of this invention.

(Embodiment 1)
Hereinafter, Embodiment 1 of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

  FIG. 1 is a perspective view showing a packaging case 1 according to the first embodiment of the present invention.

  The packing case 1 is used for packing a long object such as a straight tube fluorescent lamp. The packaging case 1 is composed of a box 2 assembled from cardboard paperboard. The box 2 is provided with an opening 3 (hatching range) for visually recognizing a long object from the outside. The box 2 includes a bottom wall 4, first and second top walls 9 and 10 that face the bottom wall 4, and a peripheral wall 60 that extends from the periphery of the bottom wall 4 to the periphery of the first and second top walls 9 and 10. Is provided.

  The bottom wall 4 has a rectangular shape. Hereinafter, the longitudinal direction of the bottom wall 4 is referred to as “longitudinal direction”, and the direction orthogonal to the longitudinal direction is referred to as “width direction”. One side in the longitudinal direction is referred to as “one side”, and the other side in the longitudinal direction is referred to as “the other side”.

  The peripheral wall 60 is erected from the long side 40 of the bottom wall 4 and is opposed to the pair of first and second side walls 5 and 6 and the short side 41 of the bottom wall 4 and is opposed to each other. It is composed of third and fourth side walls 7 and 8. The peripheral wall 60 exhibits a cylindrical shape by connecting adjacent walls of the first to fourth side walls 5 to 8.

  The first top wall 9 is connected to one side portions 42 a, 43 a of the upper end sides 42, 43 of the first, second side walls 5, 6 and the upper end side 44 of the third side wall 7. Opposite side range. The second top wall 10 is connected to the other side portions 42 b and 43 b of the upper end sides 42 and 43 of the first and second side walls 5 and 6 and the upper end side 45 of the fourth side wall 8, and Opposite side range.

  In the opening 3, the first to fourth sides of the outer edge are constituted by the ends of the first and second side walls 5 and 6 and the ends of the first and second top walls 9 and 10.

  That is, the first side is constituted by an intermediate portion 42 c between the one side portion 42 a and the other side portion 42 b in the upper end side 42 of the first side wall 5. The second side is constituted by an intermediate portion 43 c between the one side portion 43 a and the other side portion 43 b in the upper end side 43 of the second side wall 6. The third side is constituted by an end side 46 of the first top wall 9 extending between one ends of the intermediate portions 42c and 43c (first and second sides) of the upper end sides 42 and 43. The fourth side is constituted by an end side 47 of the second top wall 10 extending between the other ends of the intermediate portions 42c, 43c (first and second sides) of the upper end sides 42, 43.

  The first overlapping piece 11 is bonded to the inner surface of the first side wall 5 in a range along the first side (intermediate portion 42c of the upper end side 42). Due to this adhesion, in the range along the first side of the first side wall 5, the corrugated cardboard constituting the first side wall 5 and the corrugated cardboard constituting the first superposed piece 11 are in a state of being overlapped.

  The second overlapping piece 12 is adhered to the inner surface of the second side wall 6 in a range along the second side (intermediate portion 43c of the upper end side 43). Due to this adhesion, in the range along the second side of the second side wall 6, the corrugated cardboard constituting the second side wall 6 and the corrugated cardboard constituting the second superposed piece 12 are in a superposed state.

  FIG. 2 is a development view of the corrugated cardboard 80 constituting the packaging case 1 of the first embodiment.

  In the corrugated paperboard 80, the bottom wall 4, the first side wall 5, the parts constituting the first and second top walls 9, 10 and the first and second polymerized pieces 11, 12, the second side wall 6, and the paste margin piece 13 are successively connected via the crease lines 14, 15, 16, and 17.

  The crease line 14 is a line constituting one long side 40 of the bottom wall 4.

  The crease line 17 is provided to bend the adhesive margin 13 that is bonded to the bottom wall 4. In a state where the adhesive margin 13 is bonded to the bottom wall 4, the crease line 17 is overlapped with the end line 90 that becomes the other long side 40 of the bottom wall 4.

  The crease line 15 is a line in which the crease lines 15a, 15b, and 15c are successively continuous in the longitudinal direction, and the one side portion 42a, the intermediate portion 42c, and the other side portion 42b of the upper end side 42 are formed by the crease lines 15a, 15b, and 15c. Composed.

  The crease line 16 is a line in which the crease lines 16a, 16b, and 16c are successively continuous in the longitudinal direction, and the one side portion 43a, the intermediate portion 43c, and the other side portion 43b of the upper end side 43 are formed by the crease lines 16a, 16b, and 16c. Composed.

  Further, on the corrugated cardboard 80, cutting guide lines 18, 19, and 20 for forming notches when the packaging case 1 is assembled are formed.

  The cutting guide line 18 extends in the width direction on one side of the corrugated paperboard 80, and connects the boundary position between the crease lines 15a and 15b and the boundary position between the crease lines 16a and 16b. By this cutting guide wire 18, the first top wall 9 and the parts constituting the first and second polymer pieces 11, 12 are separated.

  The cutting guide line 19 extends in the width direction on the other side of the corrugated paperboard 80, and connects the boundary position between the crease lines 15b and 15c and the boundary position between the crease lines 16b and 16c. By this cutting guide wire 19, the second top wall 10 and the parts constituting the first and second polymer pieces 11, 12 are separated.

  The cutting guide line 20 extends in the longitudinal direction and connects the center position of the cutting guide line 18 and the center position of the cutting guide line 19. The first polymer piece 11 and the second polymer piece 12 are separated by the cutting guide wire 20.

  Further, first to fourth flaps 21, 22, 23, and 24 constituting the third side wall 7 are provided at one end of the corrugated paperboard 80. The first to fourth flaps 21, 22, 23, and 24 are connected to the bottom wall 4, the first side wall 5, the first top wall 9, and the second side wall 6 through crease lines 25, 26, 27, and 28, respectively. Is done. An insertion piece 38 is connected to the third flap 23 through a crease line 29.

  Fifth to eighth flaps 30, 31, 32, 33 constituting the fourth side wall 8 are provided at the other end of the corrugated paperboard 80. The fifth to eighth flaps 30, 31, 32, 33 are connected to the bottom wall 4, the first side wall 5, the second top wall 10, and the second side wall 6 through fold lines 34, 35, 36, 37, respectively. Is done.

  FIG. 3 is a plan view showing a procedure for assembling the packaging case 1 of the first embodiment. FIG. 4 is a cross-sectional view illustrating a procedure for assembling the packaging case 1 of the first embodiment. 4A to 4D are cross-sectional views taken along the line AA of FIGS. 3A to 3E. Hereinafter, the procedure for assembling the packaging case 1 will be described with reference to FIGS.

  First, the 1st superposition | polymerization piece 11 and the 2nd superposition | polymerization piece 12 are cut | disconnected along the cutting | disconnection guide line 20 (FIG. 3 (a), FIG. 4 (a)). Further, the first top wall 9 and the first and second polymer pieces 11 and 12 are separated along the cutting guide line 18. Further, the second top wall 10 and the first and second polymer pieces 11, 12 are separated along the cutting guide line 19.

  Next, the first and second polymer pieces 11 and 12 are bent 180 degrees along the fold lines 15b and 16b (FIGS. 3A to 3C and 4A to 4C). By this bending, the opening 3 having the first and second side walls 5 and 6 and the ends of the first and second top walls 9 and 10 as the first to fourth sides is formed (FIGS. 3C and 4C). ).

  Next, the first and second polymer pieces 11 and 12 are bonded to the first and second side walls 5 and 6 (FIGS. 3C and 4C). By this adhesion, the first and second side walls 5 and 6 are in a state in which two layers of corrugated paperboard are superposed in a range along the first and second sides of the opening 3.

  Next, the first side wall 5 and the bottom wall 4 are bent at a right angle along the fold line 15, and the portion where the second side wall 6 and the adhesive margin piece 13 are combined is bent at a right angle along the fold line 16 (see FIG. 3 (c) → (d), FIG. 4 (c) → (d)).

  Next, the adhesive margin piece 13 is bent at a right angle along the crease line 17 (FIG. 4 (d) → (e)). Further, the bottom wall 4 is bent at a right angle along the crease line 14, and the adhesive margin piece 13 is bonded to the inner surface of the bottom wall 4 so that the crease line 17 overlaps the end side 90.

  Next, an operation of forming the third side wall 7 is performed (FIG. 3D → E). In this operation, first, the second flap 22 is bent at a right angle along the fold line 26, and the fourth flap 24 is bent at a right angle along the fold line 28. Next, the third flap 23 is bent at a right angle along the fold line 27. At this time, the insertion piece 38 is bent along the crease line 29 and inserted between the second and fourth flaps 22 and 24 and the bottom wall 4. Next, the first flap 21 is bent at a right angle along the crease line 25 and bonded to the previously folded third flap 23. The third side wall 7 is formed by the above operation.

  Next, an operation for forming the fourth side wall 8 is performed (FIG. 3D → E). In this operation, first, the seventh flap 32 is bent at a right angle along the crease line 36. Next, the sixth and eighth flaps 31 and 33 are bent at right angles along the crease lines 35 and 37, respectively. Next, the fifth flap 30 is folded at a right angle along the crease line 34 and bonded to the previously folded sixth to eighth flaps 31 to 33. Through the above operations, the fourth side wall 8 is formed, and the assembly of the packaging case 1 is completed.

  FIG. 5 is a cross-sectional view showing a portion where the crease line 15b is formed. Fig.5 (a) expands and shows the B range of Fig.4 (a). FIG.5 (b) expands and shows the C range of FIG.4 (c).

  When the packaging case 1 is assembled, a recess 38 is formed in advance on one surface of the corrugated paperboard 80 along the crease lines 15b and 16b (FIGS. 4A and 5A). The recess 38 is formed, for example, by pressing the pressing tool 39 against the crease lines 15b and 16b. In the procedure for forming the opening 3 (FIGS. 3 (a) → (c), FIG. 4 (a) → (c)), the first and second surfaces are formed so that the surface on which the recess 38 is formed is on the outside (outer surface). The polymer pieces 11 and 12 are bent. As a result, the first and second sides of the opening 3 have a substantially arcuate cross section perpendicular to the surfaces of the first and second side walls 5 and 6 (FIGS. 4C and 5B). .

  Further, as shown in FIG. 2, the fifth to eighth flaps 30, 31, 32, 33 are formed with notches 30a, 31a, 32a, 33a recessed inward. The notches 30a, 31a, 32a and 33a make it easy to pick and peel the fifth to eighth flaps 30, 31, 32 and 33 with a finger when the fourth side wall 8 is opened.

  According to the present embodiment, as shown in FIG. 1, the end sides 42 c and 43 c of the first and second side walls 5 and 6 facing each other, and the end sides 46 and 47 of the first and second top walls 9 and 10, Thus, the outer edge (first to fourth sides) of the opening 3 is formed. For this reason, on the top surface of the box 2, no corrugated paperboard is present outside the opening 3 in the width direction (the direction in which the first and second side walls 5 and 6 face each other). For this reason, even when the width of the box 2 is narrow, a large opening dimension can be secured. Moreover, the rigidity of the 1st, 2nd side walls 5 and 6 is improved by overlapping a plurality of corrugated paperboards in the range along the 1st and 2nd sides of the 1st and 2nd side walls 5 and 6. For this reason, when the packaging case 1 is installed such that the first and second side walls 5 and 6 extend in the vertical direction, the packaging case 1 has a high strength against a load.

  In addition, since the first and second polymer pieces 11 and 12 are bonded to the first and second side walls 5 and 6, the first and second polymer pieces 11 and 12 are obstructive when packing a long object in the box 2. do not become. For this reason, a long object can be packed with high work efficiency.

  Further, as shown in FIGS. 4C and 5B, the cross sections of the first and second sides (intermediate portions 42c and 43c of the upper end sides 42 and 43) have a smooth substantially arc shape with no corners. Therefore, the hand is not cut by contact with the first and second sides.

  Corrugated paperboard has greater strength than PET and is less likely to deform. Thereby, the box 2 made of corrugated paperboard does not need to ensure a large gap between the wall surface and the contents (long object), and therefore the volume of the packaging case 1 (box 2) can be kept small. Therefore, by using the packing case 1 for packing long objects, the number of long objects that can be loaded on the vehicle increases, so that many long objects can be transported with low transportation frequency, and CO2 emissions and transportation costs are reduced. Is done.

  Further, the box body 2 is formed of corrugated paperboard, and can be fixed to the base cardboard by a stapler or the like without providing fixing hooks unlike the PET case. Also from this point, the volume of the packaging case 1 (box body 2) can be kept small.

  Further, since the packaging case 1 (box body 2) is made of corrugated cardboard, even if the packaging case 1 is incinerated, no pollution component is released.

  Moreover, the state which accommodated the elongate object in the box 2 is stably maintained by providing the 1st, 2nd top walls 9 and 10 in the outer side of the opening 3. FIG.

  In addition, it is preferable to use the corrugated paperboard which provided the white liner whose outermost layer is white as the corrugated paperboard which forms the box 2. By doing in this way, box 2 is excellent in appearance and can raise the commercial value of a long thing.

  When transporting and storing a long object, the first and second polymer pieces 11, 12 and the first and second top walls 9, 10 are still connected to the cutting guide wires 18, 19, and 20. The box 2 can be assembled. In this case, since the opening 3 is not formed in the box 2, the long object is not exposed to the outside, and the deformation of the box 2 is suppressed, so that the long object can be prevented from being damaged. Thereafter, when displaying a long object, the first and second polymer pieces 11 and 12 are separated from the first and second top walls 9 and 10 and bent to form the opening 3. In addition, by providing a gap between the wall surface of the box body 2 and the long object, the first and second polymer pieces 11 and 12 can be bent while the long object is accommodated, and the opening 3 can be formed. .

(Embodiment 2)
FIG. 6 is a perspective view showing the packaging case 48 according to the second embodiment of the present invention. The packaging case 48 of the second embodiment is obtained by integrally providing a hanging plate 49 on the box 2 of the first embodiment. The suspension plate 49 extends from one short side 41 of the bottom wall 4 to the outside of the box body 2.

  FIG. 7 is a development view of the corrugated paperboard 81 constituting the packaging case 48 of the second embodiment. On one side of the corrugated paperboard 81, ninth and tenth flaps 50, 51 constituting a hanging plate 49 are provided. The ninth flap 50 is connected to the end side 52 of the first flap 21. The tenth flap 51 is connected to one end portion of the ninth flap 50 via a crease line 53. The ninth and tenth flaps 50, 51 have through holes 50a, 51b. The through holes 50a and 51b are formed at symmetrical positions around the crease line 53.

  When assembling the packing case 48, first, the box body 2 is assembled according to the same procedure as that shown in FIGS. Thereafter, the tenth flap 51 is bent 180 degrees along the crease line 53 and bonded to the ninth flap 50, thereby forming the hanging plate 49. Thus, the assembly of the packing case 48 is completed. After the ninth and tenth flaps 50 and 51 are bonded, the through holes 50a and 51b are connected to each other in the front-rear direction.

  According to the present embodiment, the packaging case 48 can be suspended from the fixture by inserting the pins of the fixture into the through holes 50a and 51b of the suspension plate 49. Thereby, many long objects can be exhibited even in a small space.

  The position where the suspension plate 49 is provided is not limited to the short side 41 of the bottom wall 4. For example, the suspension plate 49 is provided at the center height position of the upper end sides 44 and 45 of the third and fourth side walls 7 and 8, the long side 40 of the bottom wall 4, and the first to fourth side walls 5 to 8. Also good.

(Embodiment 3)
FIG. 8 is a perspective view showing the packaging case 54 according to the third embodiment of the present invention. The packing case 54 includes a box body 70 in which the polymer pieces are bonded to the inner surfaces of the first and second top walls 9 and 10 in addition to the inner surfaces of the first and second side walls 5 and 6. That is, in the box body 70, the third overlapping piece 56 is bonded to a range along the first side (the upper end side 42 c) of the inner surface of the first side wall 5. Further, the fourth overlapping piece 57 is bonded to the inner surface of the second side wall 6 in a range along the second side (upper side 43c). Further, the fifth overlapping piece 58 is bonded to the inner surface of the first top wall 9 in a range along the third side (upper end side 46). Further, the sixth overlapping piece 59 is bonded to the inner surface of the second top wall 10 in a range along the fourth side (upper end side 47). The box body 70 is in a state in which two layers of corrugated paperboard are overlapped in the range along the first to fourth sides of the opening 3 by the adhesion of the above third to sixth polymer pieces 56 to 59.

  FIG. 9 is a development view of the corrugated cardboard 82 constituting the packing case 54 of the third embodiment. The corrugated paperboard 82 of FIG. 9 is obtained by changing the shape of the range constituting the opening 3 (the range between the crease lines 15b and 16b) from the corrugated paperboard 80 of FIG. In this range, the 3rd to 6th polymer pieces 56 to 59 are separated by the cutting guide lines 61 to 63.

  The cutting guide line 61 is bent into a substantially U-shape projecting to the other side and extends in the width direction, and connects the boundary position between the crease lines 15a and 15b and the boundary position between the crease lines 15a and 15b. By this cutting guide wire 61, the fifth polymer piece 58 and the parts constituting the third and fourth polymer pieces 56, 57 are separated.

  The cutting guide line 62 is bent into a substantially U-shape projecting to one side, extends in the width direction, and connects the boundary position between the crease lines 15a and 15b and the boundary position between the crease lines 15a and 15b. By this cutting guide wire 62, the sixth polymer piece 59 and the parts constituting the third and fourth polymer pieces 56, 57 are separated.

  The cutting guide wire 63 extends in the longitudinal direction and connects the center positions of the cutting guide wires 61 and 62. The third polymer piece 56 and the fourth polymer piece 57 are separated by the cutting guide line 63.

  The third overlap piece 56 is connected to the first side wall 5 via the fold line 15b, and the fourth overlap piece 57 is connected to the second side wall 6 via the fold line 16b.

  The fifth polymer piece 58 is connected to the first top wall 9 through the crease line 91. The crease line 91 extends on a straight line in the width direction connecting the boundary position between the crease lines 15 a and 15 b and the boundary position between the crease lines 16 a and 16 b, and both ends are connected to intermediate positions of the cutting guide line 61.

  The sixth polymer piece 59 is connected to the tenth top wall 10 via the crease line 92. The crease line 92 extends on a straight line in the width direction connecting the boundary position between the crease lines 15 b and 15 c and the boundary position between the crease lines 16 b and 16 c, and both ends are connected to intermediate positions of the cutting guide line 62.

  FIG. 10 is a plan view showing a procedure for assembling the packaging case 54 of the third embodiment. Hereinafter, the procedure for assembling the packing case 54 will be described with reference to FIG.

  First, the third to sixth polymer pieces 56 to 59 are cut along the cutting guide lines 61 to 63 (FIG. 10A).

  Next, the third to sixth polymer pieces 56 to 59 are bent 180 degrees along the crease lines 15b, 16b, 91, and 92, respectively (FIGS. 10A to 10C). The opening 3 is formed by this bending.

  Next, the third to sixth polymer pieces 56 to 59 are bonded to the first side wall 5, the second side wall 6, the first top wall 9, and the second top wall 10, respectively (FIG. 10C).

  Next, as in FIGS. 3C to 3D, the first side wall 5 and the bottom wall 4 are bent along the crease line 15, and the second side wall 6 and the glue margin piece 13 are bent along the crease line 16 (FIG. 3). 10 (c) → (d)).

  Next, the third and fourth side walls 7 and 8 are formed in the same manner as in FIGS. 3D to 3E (FIGS. 10D to 10E). This completes the assembly of the packaging case 54.

  In the present embodiment, a recess 38 (FIG. 5A) is formed in advance on one surface of the corrugated paperboard 82 along the crease lines 15b, 16b, 91, 92. In the procedure for forming the opening 3 (FIGS. 10A to 10C), the third to sixth polymer pieces 56 to 59 are bent so that the surface on which the recess 38 is formed becomes the outer side (outer surface). As a result, the first and second sides of the opening 3 are substantially arc-shaped in cross section perpendicular to the surfaces of the first and second side walls 5 and 6, and the third and fourth sides of the opening 3 are the first and second sides. A cross section perpendicular to the surfaces of the walls 9 and 10 has a substantially arc shape.

  In the present embodiment, the box body 70 has a higher strength against the load because a plurality of cardboard paperboards are stacked in a range along the first to fourth sides of the opening 3.

  Further, when the third to sixth polymer pieces 56 to 59 are bonded to the first and second side walls 5 and 6 and the first and second top walls 9 and 10, when packing the contents in the box 2, The third to sixth polymer pieces 56 to 59 do not get in the way. For this reason, a long object can be packed with high work efficiency.

  In addition, since the cross section of the first to fourth sides of the opening 3 has a smooth substantially arc shape with no corners, the hand is not cut even if it touches any part of the outer edge of the opening 3.

  The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the claims.

  11 and 12 are perspective views showing modifications of the present invention. Hereinafter, a modification of the first embodiment will be described with reference to FIGS. The following changes can be applied to the second and third embodiments as well.

  For example, the first and second polymer pieces 11 and 12 may be provided separately from the box body 2 ((FIG. 11A). In this case, the first and second polymer pieces are assembled after the box body 2 is assembled. Corrugated paperboards 11 and 12 are bonded to the first and second side walls 5 and 6.

  Further, the number of corrugated paperboards constituting the first and second polymer pieces 11 and 12, that is, the number of corrugated paperboards to be bonded to the first and second side walls 5 and 6 may be plural.

  Moreover, the 1st, 2nd superposition | polymerization piece 11 and 12 may be extended below to the position which contact | connects the bottom wall 4 (FIG.11 (b)). The first and second polymer pieces 11 and 12 may be provided not only in the range along the edge of the opening 3 but also in the outer range (FIG. 11C). By doing in this way, the intensity | strength of the box 2 becomes still larger.

  Moreover, the opening 3 may be formed so as to straddle the side surface and the top surface of the box body 2 (FIG. 12A). By doing in this way, the range which can see a long thing becomes still larger.

  Moreover, the 3rd, 4th side walls 7 and 8 may be abbreviate | omitted and the edge part of one side and the other side may open the box 2 (FIG.12 (b)). By doing in this way, taking in and out of a long thing becomes easy.

  Further, the present invention can be applied not only to a case for packing a long object, but also to a case for packing food, cosmetics, and the like. In this case, the box 2 is formed, for example, in a cubic shape in which the bottom wall 4 has a square shape (FIG. 12C).

  A part or all of the above-described embodiment can be described as in the following supplementary notes, but is not limited thereto.

(Appendix 1)
A bottom wall formed from corrugated paperboard, a top wall facing the bottom wall, and a side wall reaching from the periphery of the bottom wall to the periphery of the top wall;
A pair of opposite side wall ends among the side walls and an opening with the top wall end as an outer edge are formed,
In the range along the outer edge of the opening, the pair of side walls are stacked with a plurality of the corrugated paperboards.
A packaging case characterized by that.

(Appendix 2)
The bottom wall has a rectangular shape;
The packaging case according to appendix 1, wherein the pair of side walls are first and second side walls erected from a long side of the bottom wall.

(Appendix 3)
The top wall is connected to one side portion of the upper end side of the first and second side walls, and is opposed to the one side range of the bottom wall, and the upper end side of the first and second side walls. A second top wall that is connected to the other side portion of the bottom wall and faces the other side range of the bottom wall,
The outer edge of the opening includes a first side constituted by an intermediate portion between the one side portion and the other side portion of the upper end side of the first side wall, and the one side portion of the upper end side of the second side wall. And a second side constituted by an intermediate part between the first side wall and the second side part, and an end side of the first top wall extending between one ends of the intermediate parts at the upper end sides of the first and second side walls. And a fourth side constituted by an end side of the second top wall extending between the other ends of the intermediate portion at the upper end side of the first and second side walls,
The packaging case according to claim 2, wherein the first and second side walls are overlapped with each other in a range along the first and second sides.

(Appendix 4)
In the middle part of the upper end side of the first and second side walls, respectively, first and second polymer pieces are continuously provided,
The first overlapping piece is bent with an intermediate portion of the upper end side of the first side wall as a fold, and the second overlapping piece is bent with an intermediate portion of the upper end side of the second side wall as a fold. The opening is formed,
The bent first and second polymer pieces are bonded to the first and second side walls, respectively, so that the first and second side walls are in a range along the first and second sides, and the corrugated paperboard is 2 The packaging case according to appendix 3, wherein the layers are stacked.

(Appendix 5)
The packaging case according to any one of appendices 1 to 4, wherein an outer edge of the opening formed on the pair of side walls has a substantially arc shape in a cross section perpendicular to the surfaces of the pair of side walls.

(Appendix 6)
The packaging case according to any one of appendices 1 to 5, further comprising a hanging plate that is made of corrugated cardboard, is provided integrally with the box, and extends to the outside of the box.

(Appendix 7)
The packaging case according to any one of appendices 1 to 6, wherein a plurality of the corrugated paperboards are stacked on the top wall in a range along the outer edge of the opening.

1,48,54 packing case
2,70 box
3 opening
4 Bottom wall
5 1st side wall
6 Second side wall
7 Third side wall
8 4th side wall
9 First top wall
10 Second top wall
11 First polymerized piece
12 Second polymerized piece
13 Paste pieces 14, 15, 15a, 15b, 15c, 16, 16a, 16b, 16c, 17, 25,
26, 27, 28, 29, 34, 35, 36, 37, 53, 91, 92 Fold line 18, 19, 20, 61, 62, 63 Cutting guide line
21 First flap
22 Second flap
23 3rd flap
24 4th flap
30 Flap
31 6th flap
32 7th flap
33 8th flap 30a, 31a, 32a, 33a Notch
38 plug
39 Pressing tool
40 Long side of bottom wall
41 Short side of bottom wall
42, 43, 44, 45 Upper edge of side wall
42a, 43a One side part of upper end side
42b, 43b The other side of the upper edge
42c, 43c Middle part of the upper edge
46, 47 Edge of top wall
49 Suspension plate
50 9th flap
50a, 51a Through hole
51 10th flap
52 edge
56 3rd polymerization piece
57 4th polymer piece
58 5th polymer piece
59 6th polymerized piece
60 wall
80, 81, 82 Corrugated paperboard

Claims (7)

A bottom wall formed from corrugated paperboard, a top wall facing the bottom wall, and a side wall reaching from the periphery of the bottom wall to the periphery of the top wall;
A pair of opposite side wall ends among the side walls and an opening with the top wall end as an outer edge are formed,
In the range along the outer edge of the opening, the pair of side walls are stacked with a plurality of the corrugated paperboards.
A packaging case characterized by that. The bottom wall has a rectangular shape;
The packaging case according to claim 1, wherein the pair of side walls are first and second side walls erected from a long side of the bottom wall. The top wall is connected to one side portion of the upper end side of the first and second side walls, and is opposed to the one side range of the bottom wall, and the upper end side of the first and second side walls. A second top wall that is connected to the other side portion of the bottom wall and faces the other side range of the bottom wall,
The outer edge of the opening includes a first side constituted by an intermediate portion between the one side portion and the other side portion of the upper end side of the first side wall, and the one side portion of the upper end side of the second side wall. And a second side constituted by an intermediate part between the first side wall and the second side part, and an end side of the first top wall extending between one ends of the intermediate parts at the upper end sides of the first and second side walls. And a fourth side constituted by an end side of the second top wall extending between the other ends of the intermediate portion at the upper end side of the first and second side walls,
The packaging case according to claim 2, wherein the first and second side walls are overlapped with each other in a range along the first and second sides. In the middle part of the upper end side of the first and second side walls, respectively, first and second polymer pieces are continuously provided,
The first overlapping piece is bent with an intermediate portion of the upper end side of the first side wall as a fold, and the second overlapping piece is bent with an intermediate portion of the upper end side of the second side wall as a fold. The opening is formed,
The bent first and second polymer pieces are bonded to the first and second side walls, respectively, so that the first and second side walls are in a range along the first and second sides, and the corrugated paperboard is 2 The packaging case according to claim 3, wherein the layers are superposed.   5. The packaging case according to claim 1, wherein an outer edge of the opening formed in the pair of side walls has a substantially arc shape in a cross section perpendicular to a surface of the pair of side walls. .   The packaging case according to any one of claims 1 to 5, further comprising a hanging plate made of corrugated paperboard and provided integrally with the box and extending outside the box. .   The packaging case according to any one of claims 1 to 6, wherein a plurality of the corrugated paperboards are stacked on the top wall in a range along the outer edge of the opening.

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