Packaging box

Abstract

To provide a packaging box which can be easily assembled from a primary assembly to a final assembly.SOLUTION: A packaging box which is configured to: connect a front panel consisting of an inner panel and an outer panel attached to the front edge of a rectangular central panel, a rear panel consisting of an inner panel and an outer panel attached to the rear edge of the central panel, a left panel attached to the left edge of the central panel, a right panel attached to the right edge of the central panel, front connecting panels between the left edge of the outer panel of the front panel and the front edge of the left panel adjacent thereto and between the right edge of the outer panel of the front panel and the front edge of the right panel adjacent thereto, rear connecting panels between the left edge of the outer panel of the rear panel and the rear edge of the left panel adjacent thereto and between the right edge of the outer panel of the rear panel and the rear edge of the right panel adjacent thereto, a left top panel attached to the left edge of the left panel, and a right top panel attached to the right edge of the right panel, via respective folding portions, to an unfolded sheet; bending the folding portions of the unfolded sheet; sandwiching the front connecting panel between the inner and outer panels of the front panel; sandwiching the rear connecting panel between the inner and outer panels of the rear panel; erecting the front side panel, the rear side panel, the left side panel, and the right side panel relative to the central panel to form a box body with an opening at the top; closing the opening by the left top panel and the right top panel; bending the folding portions of the unfolded sheet to overlap the left and right panels on the inner surface of the center panel; overlapping the front connecting panel on the inner surface of the outer panel of the front panel to secure thereto; overlapping the rear connecting panel on the inner surface of the outer panel of the rear panel to secure thereto; and overlapping the left top panel on the outer surface of the left panel and / or overlapping the right top panel on the outer surface of the right panel, forming a primary assembly.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a packaging box that can be easily assembled from a primary assembly to a final assembly. [Background technology]

[0002] A known conventional packaging box, primarily for storing bottles of sake and the like, has a back piece that forms the back of the box body, with two opposing sides folded to form a square frame in cross section, the front ends of the inner folded pieces attached to the back piece to form the top and bottom sections which can be raised or lowered, with engagement grooves formed in the centres of the front pieces and extending to the inner folded piece, and two insertion holes for the head of the bottle formed in the inner folded piece on the top section, with left and right side wall pieces and a lid piece formed continuously on the other two opposing sides with folds, and with locking segments at the front of these which engage with the engagement grooves and are inserted into the box body, and further with foldable connecting pieces with diagonal folds at the four corners between the outer pieces of the top and bottom sections and the left and right side wall pieces. When using the box, two bottles are placed side by side on the back piece, with their top and bottom aligned, and then assembled.The two bottles are then stored inside the completed box body, and the heads of the bottles are inserted into the head insertion holes formed on the inner folded piece of the top surface, while the mating locking segments are inserted between the bottles, securing each bottle in place and preventing direct collisions with each other (see Patent Document 1). [Prior art documents] [Patent documents] [Patent Document 1] Utility Model Registration No. 3075600

[0003] To assemble the packaging box, the locking partition pieces are raised approximately 90 degrees relative to the lid piece, and then the lid piece is rotated so that it is above the back piece while pushing the left and right side wall pieces from both sides to raise them up.Then, the connecting pieces bend inward along with the left and right side wall pieces, and the top and bottom parts also rise up to form the box body.Finally, the locking partition pieces are butted together and inserted into the engaging grooves to complete the box body. However, in actual assembly work, even if the left and right side walls, top and bottom are raised, the raised state is not maintained, and the raised state is maintained only when the locking segments are butted together and inserted into the engagement grooves to close the opening of the box. Therefore, in order to butt together and insert the locking segments into the engagement grooves, the left and right side wall pieces, top and bottom must be held upright by hand, which makes assembly time-consuming. Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention has been made to solve the above problems. An object of the present invention is to provide a packaging box that can be easily assembled from a primary assembly to a final assembly. Furthermore, an object of the present invention is to provide a packaging box that can be easily assembled from a primary assembly to a final assembly, in which the top plate has a function of separating the box body. Furthermore, an object of the present invention is to provide a packaging box that can be easily assembled from a primary assembly to a final assembly, in which the top plate has an excellent appearance. [Means for solving the problem]

[0005] The problem to be solved by the present invention is as described above, and the means for solving this problem will now be described.

[0006] In the first invention, a front panel consisting of an inner panel and an outer panel is attached to the front edge of a rectangular central panel, a rear panel consisting of an inner panel and an outer panel is attached to the rear edge of the central panel, a left panel is attached to the left edge of the central panel, a right panel is attached to the right edge of the central panel, front connecting panels are attached between the left edge of the outer panel of an adjacent front panel and the front edge of the left panel, and between the right edge of the outer panel of an adjacent front panel and the front edge of the right panel, rear connecting panels are attached between the left edge of the outer panel of an adjacent rear panel and the rear edge of the left panel, and between the right edge of the outer panel of an adjacent rear panel and the rear edge of the right panel, a left top panel is attached to the left edge of the left panel, and a right top panel is attached to the right edge of the right panel, and the folding sections are folded to connect the inner panel and the outer panel of the front panel. a packaging box in which the front connecting plate is sandwiched and the rear connecting plate is sandwiched between the inner and outer plates of the rear plate; the front, rear, left and right plates are erected relative to the central plate to form a box main body with an opening at the top, and the opening is closed by the left and right top plates; and the packaging box is characterized in that the folding portion of the unfolded sheet is folded to overlap the left and right side plates on the inner side of the central plate, the front connecting plate is overlapped and fixed to the inner side of the outer plate of the front plate, the rear connecting plate is overlapped and fixed to the inner side of the outer plate of the rear plate, and the left top plate is overlapped on the outer surface of the left plate and / or the right top plate is overlapped on the outer surface of the right plate to form a primary assembled product.

[0007] The second invention is a packaging box according to the first invention, characterized in that an insert plate is connected to the free end edge of at least one of the left top plate and the right top plate via a bent portion, and when the opening is closed, the bent portion is bent to cause the insert plate to hang down from the top plate and be positioned within the box main body.

[0008] A third invention is a packaging box according to the first or second invention, characterized in that a reinforcing plate is provided at the end edges of the front connecting plate and the rear connecting plate via a curved bent portion, and when the assembly of the packaging box is complete, the reinforcing plate contacts the inner plate to regulate the swinging of the front plate and the rear plate.

[0009] The fourth invention is a packaging box according to the first or second invention, characterized in that the outer and inner panels of the front panel, and the inner and outer panels of the rear panel are stacked together to form a primary assembly.

[0010] The fifth invention is the third invention, and is a packaging box characterized in that the outer and inner panels of the front panel, and the inner and outer panels of the rear panel are stacked together to form a primary assembly.

[0011] The sixth invention is a packaging box according to the first or second invention, characterized in that a flap plate is formed on one of the left top plate and the right top plate, and a flap receiving portion having a step recessed from the outer surface of the top plate is formed on the other, and when the opening is closed, the flap plate is placed in the flap receiving portion so that the outer surface of the flap plate and the outer surface of the top plate are positioned on approximately the same plane.

[0012] The seventh invention is a packaging box according to the third invention, characterized in that a flap plate is formed on one of the left top plate and the right top plate, and a flap receiving portion having a step recessed from the outer surface of the top plate is formed on the other, and when the opening is closed, the flap plate is placed in the flap receiving portion so that the outer surface of the flap plate and the outer surface of the top plate are positioned on approximately the same plane.

[0013] The eighth invention is a packaging box according to the fourth invention, characterized in that a flap plate is formed on one of the left top plate and the right top plate, and a flap receiving portion having a step recessed from the outer surface of the top plate is formed on the other, and when the opening is closed, the flap plate is placed in the flap receiving portion so that the outer surface of the flap plate and the outer surface of the top plate are positioned on approximately the same plane.

[0014] The ninth invention is a packaging box according to the fifth invention, characterized in that a flap plate is formed on one of the left top plate and the right top plate, and a flap receiving portion having a step recessed from the outer surface of the top plate is formed on the other, and when the opening is closed, the flap plate is placed in the flap receiving portion so that the outer surface of the flap plate and the outer surface of the top plate are positioned on approximately the same plane.

[0015] In the tenth aspect of the present invention, an unfolded sheet is provided which connects a front panel consisting of an inner panel and an outer panel at the front edge of a rectangular central panel, a rear panel consisting of an inner panel and an outer panel at the rear edge of the central panel, a left panel at the left edge of the central panel, a right panel at the right edge of the central panel, front connecting panels between the left edge of the outer panel of an adjacent front panel and the front edge of the left panel, and between the right edge of the outer panel of an adjacent front panel and the front edge of the right panel, rear connecting panels between the left edge of the outer panel of an adjacent rear panel and the rear edge of the left panel, and between the right edge of the outer panel of an adjacent rear panel and the rear edge of the right panel, and a top panel at either the left edge of the left panel or the right edge of the right panel, and the above-mentioned components are connected via folding sections of the unfolded sheet, and the folding sections are folded to connect the inner panel and the outer panel of the front panel to the front panel. a packaging box in which a side connecting plate is sandwiched between the inner and outer plates of the rear plate, the rear connecting plate is sandwiched between the inner and outer plates of the rear plate, the front plate, the rear plate, the left plate, and the right plate are erected relative to the central plate to form a box main body with an opening at the top, and the opening is closed by the top plate, wherein the folding portion of the unfolded sheet is folded to overlap the left plate and the right plate on the inner side of the central plate, the front connecting plate is overlapped and fixed to the inner side of the outer plate of the front plate, the rear connecting plate is overlapped and fixed to the inner side of the outer plate of the rear plate, and the top plate is overlapped on the outer surface of the left plate if the top plate is connected to the left plate, or the top plate is overlapped on the outer surface of the right plate if the top plate is connected to the right plate.

[0016] In the eleventh invention, a rectangular central plate has a front plate consisting of an inner plate and an outer plate at the front edge thereof, a rear plate consisting of an inner plate and an outer plate at the rear edge thereof, a left side plate at the left edge of the central plate, a right side plate at the right edge of the central plate, an inner plate at either the left edge of the left side plate or the right edge of the right side plate, and a top plate at the other edge thereof, and a space between the left edge of the outer plate of an adjacent front plate and the front edge of the left side plate, and between the right edge of the outer plate of an adjacent front plate and the A front connecting plate is provided between the front edge of the right side plate, and a rear connecting plate is provided between the left edge of the outer plate of the adjacent rear side plate and the rear edge of the left side plate, and between the right edge of the outer plate of the adjacent rear side plate and the rear edge of the right side plate, and the folding portions of the unfolded sheet are folded to sandwich the front connecting plate between the inner plate and the outer plate of the front side plate, and to sandwich the rear connecting plate between the inner plate and the outer plate of the rear side plate. and a packaging box in which the front panel, the rear panel, the left panel, and the right panel are erected relative to the central panel to form a box main body with an opening at the top, and the opening is closed by the top panel, wherein the folding portion of the unfolded sheet is folded to overlap the left panel and the right panel on the inner surface of the central panel, the front connecting panel is overlapped and fixed to the inner surface of the outer panel of the front panel, the rear connecting panel is overlapped and fixed to the inner surface of the outer panel of the rear panel, and when the top panel is connected to the left panel, the top panel is overlapped on the outer surface of the left panel, and when the top panel is connected to the right panel, the top panel is overlapped on the outer surface of the right panel, and / or when the inner panel is connected to the left panel, the inner panel is overlapped on the outer surface of the left panel, and when the inner panel is connected to the right panel, the inner panel is overlapped on the outer surface of the right panel.

[0017] In the twelfth invention, a front panel consisting of an inner panel and an outer panel is provided at the front edge of a rectangular central panel, a rear panel consisting of an inner panel and an outer panel is provided at the rear edge of the central panel, a left panel is provided at the left edge of the central panel, a right panel is provided at the right edge of the central panel, an inner panel is provided at either the left edge of the left panel or the right edge of the right panel, and a top panel is provided at the other edge, and a space between the left edge of the outer panel of an adjacent front panel and the front edge of the left panel, and between the right edge of the outer panel of an adjacent front panel and the front edge of the right panel. and a front connecting plate between the left side of the outer plate of the adjacent rear plate and the rear side of the left side plate, and a rear connecting plate between the right side of the outer plate of the adjacent rear plate and the rear side of the right side plate, by folding the folding parts of the unfolded sheet connected via folding parts, so that the front connecting plate is sandwiched between the inner plate and the outer plate of the front plate, and the rear connecting plate is sandwiched between the inner plate and the outer plate of the rear plate, and a packaging box in which the front panel, the rear panel, the left panel, and the right panel are erected to form a box main body with an opening at the top, and the opening is closed by the top panel; the unfolded sheet is folded at the folding portion so that, if the inside panel is connected to the left panel, the inside panel is overlapped on the inside surface of the left panel; the left panel and the inside panel are overlapped on the inside surface of the central panel; if the inside panel is connected to the right panel, the inside panel is overlapped on the inside surface of the right panel; the right panel and the inside panel are overlapped on the inside surface of the central panel; the front connecting panel is overlapped and fixed to the inside surface of the outside panel of the front panel; the rear connecting panel is overlapped and fixed to the inside surface of the outside panel of the rear panel; if the top panel is connected to the left panel, the top panel is overlapped on the outer surface of the left panel; and if the top panel is connected to the right panel, the top panel is overlapped on the outer surface of the right panel.

[0018] The 13th invention is any one of the 10th to 12th inventions, and is characterized in that a reinforcing plate is provided at the end edges of the front connecting plate and the rear connecting plate via a curved bent portion, and when the assembly of the packaging box is complete, the reinforcing plate comes into contact with the inner plate to restrict the swinging of the front plate and the rear plate.

[0019] The fourteenth invention is a packaging box according to any one of the tenth to twelfth inventions, characterized in that the outer and inner panels of the front panel, and the inner and outer panels of the rear panel are stacked together to form a primary assembly.

[0020] The 15th invention is the 13th invention, and is a packaging box characterized in that the outer and inner panels of the front panel, and the inner and outer panels of the rear panel are stacked together to form a primary assembly. [Effects of the Invention]

[0021] The present invention has the following effects.

[0022] According to the first invention, the folded portion of the unfolded sheet is folded, and the left and right panels are placed on the inner surface of the center panel, the front connecting panel is placed on and fixed to the inner surface of the outer panel of the front panel, the rear connecting panel is placed on and fixed to the inner surface of the outer panel of the rear panel, and the left top panel is placed on the outer surface of the left panel, and / or the right top panel is placed on the outer surface of the right panel, to form the primary assembly. Therefore, when the primary assembly is finally assembled and used, simply by pulling the left and / or right top panels outward or pushing the left and right side panels toward the inside of the box to raise them up from the center panel, the left and right side panels and the front and rear outer panels rise in unison because the front connecting panel and the outer panel of the front panel, and the rear connecting panel and the outer panel of the rear panel, are fixed together. The box body can be formed extremely easily by clamping the front connecting panel and the rear connecting panel between the inner and outer panels of the front panel and the inner and outer panels of the rear panel, respectively. At this time, the left and right top panels are open to the outside of the box body, and the opening is open, so the left and right top panels do not get in the way when fastening the left and right inner panels, allowing for easy assembly. In this state, the left and right side panels and the front and rear side panels remain upright, eliminating the difficulty of supporting them with your hands and making it easy to close the opening.

[0023] Furthermore, according to the second invention, in addition to the effects of the first invention, by connecting an insertion plate to the free end edge of at least one of the left and right top plates via a bending portion, when closing the opening, the bending portion is bent to cause the insertion plate to hang down from the top plate and be positioned inside the box main body, making it possible to divide the inside of the box main body very easily.

[0024] According to the third invention, in addition to the effects of the first or second invention, by providing reinforcing plates at the end edges of the front connecting plate and the rear connecting plate via bent portions, when the assembly of the packaging box is complete, the reinforcing plates come into contact with the inner plates to restrict the front and rear plates from swinging and prevent the front and rear plates from opening outward, thereby stabilizing the strength of the box and improving the aesthetic appearance of the box. Also, because the bent portions between the front and rear connecting plates and the reinforcing plates are curved, even if a force acts on the front and rear connecting plates to open them outward, the reinforcing plates can maintain an angled position relative to the front and rear connecting plates and can be braced between the inner and outer plates.

[0025] Furthermore, according to the fourth and fifth inventions, in addition to the effects of the first to third inventions, the stacked state of the inner and outer panels forms the primary assembly, so that the left and right side panels and the front and rear outer panels are erected, and the inner panel of the front panel and the inner panel of the rear panel are erected within the box body, making assembly even easier.

[0026] Furthermore, according to the sixth to ninth inventions, in addition to the effects of the first to fifth inventions, a flap plate is formed on either the left or right top plate, and a flap receiving portion with a step recessed from the outer surface of the top plate is formed on the other, and by fitting the flap plate into the flap receiving portion when the opening is closed, the outer surface of the flap plate and the outer surface of the top plate are positioned on approximately the same plane. Therefore, the flap plate does not protrude from the outer surface of the top plate, and the outer surface of the top plate can be assembled flat and beautifully.

[0027] Furthermore, according to the tenth invention, the folded portions of the unfolded sheet are folded, and the left and right panels are placed on the inner surface of the center panel, the front connecting panel is placed on the inner surface of the outer panel of the front panel and fixed thereto, the rear connecting panel is placed on the inner surface of the outer panel of the rear panel and fixed thereto, and if a top panel is connected to the left panel, the top panel is placed on the outer surface of the left panel, and if a top panel is connected to the right panel, the top panel is placed on the outer surface of the right panel. This forms the primary assembly. Therefore, when the primary assembly is finally assembled and used, simply by pulling the top panel outward or pushing the left and right side panels toward the inside of the box, the box can be raised from the center panel. Because the front connecting panel and the outer panel of the front panel, and the rear connecting panel and the outer panel of the rear panel, are fixed together, the left and right side panels and the front and rear outer panels rise in unison. The front connecting panel and the rear connecting panel are sandwiched between the inner and outer panels of the front panel and the inner and outer panels of the rear panel, respectively, to form the box body very easily. At this time, the top panel is open to the outside of the box body and the opening is open, so the top panel does not get in the way when fastening the left and right inner panels, allowing for easy assembly. In this state, the left and right side panels and the front and rear side panels remain upright, eliminating the difficulty of manually supporting them and easily closing the opening.

[0028] Furthermore, according to the eleventh invention, the folded portions of the unfolded sheet are folded, and the left and right panels are placed on the inner surface of the center panel, the front connecting panel is placed on the inner surface of the outer panel of the front panel and fixed thereto, the rear connecting panel is placed on the inner surface of the outer panel of the rear panel and fixed thereto, and if a top panel is connected to the left panel, the top panel is placed on the outer surface of the left panel, and if a top panel is connected to the right panel, the top panel is placed on the outer surface of the right panel, and / or if an inner panel is connected to the left panel, the inner panel is placed on the outer surface of the left panel, and if an inner panel is connected to the right panel, the inner panel is placed on the outer surface of the right panel. Therefore, when the primary assembly is finally assembled and used, simply by pulling the top and inner panels outward or pushing the left and right side panels toward the inside of the box to raise them up from the center panel, the left and right side panels and the front and rear outer panels rise in unison because the front connecting panel and the outer panel of the front panel, and the rear connecting panel and the outer panel of the rear panel, are fixed together. The box body can be formed extremely easily by clamping the front connecting panel and the rear connecting panel between the inner and outer panels of the front panel and the inner and outer panels of the rear panel, respectively. At this time, the top and inner panels are open to the outside of the box body, and the opening is open, so the top and inner panels do not get in the way when fastening the left and right inner panels, allowing for easy assembly. In this state, the left and right side panels and the front and rear side panels remain upright, eliminating the difficulty of manually supporting them and easily closing the opening.

[0029] Furthermore, according to the twelfth aspect of the invention, the folded portion of the unfolded sheet is folded, and when an inner plate is connected to the left side plate, the inner plate is overlapped on the inner surface of the left side plate, and the left side plate and inner plate are overlapped on the inner surface of the central plate, and when an inner plate is connected to the right side plate, the inner plate is overlapped on the inner surface of the right side plate, and the right side plate and inner plate are overlapped on the inner surface of the central plate, and the front connecting plate is overlapped and fixed to the inner surface of the outer plate of the front plate, and the rear connecting plate is overlapped and fixed to the inner surface of the outer plate of the rear plate, and when a top plate is connected to the left side plate, the top plate is overlapped on the outer surface of the left side plate, and when a top plate is connected to the right side plate, the top plate is overlapped on the outer surface of the right side plate. Therefore, when the primary assembly is finally assembled and used, simply by pulling the top panel outward or pushing the left and right side panels toward the inside of the box, the box can be raised from the center panel. Because the front connecting panel and the outer panel of the front panel, and the rear connecting panel and the outer panel of the rear panel, are fixed together, the left and right side panels and the front and rear outer panels rise in unison. The front connecting panel and the rear connecting panel are sandwiched between the inner and outer panels of the front panel and the inner and outer panels of the rear panel, respectively, to form the box body very easily. At this time, the top panel is open to the outside of the box body and the opening is open, so the top panel does not get in the way when fastening the left and right inner panels, allowing for easy assembly. In this state, the left and right side panels and the front and rear side panels remain upright, eliminating the difficulty of manually supporting them and easily closing the opening.

[0030] According to the thirteenth invention, in addition to the effects of the tenth to twelfth inventions, by providing reinforcing plates at the end edges of the front connecting plate and the rear connecting plate via bent portions, when the packaging box is fully assembled, the reinforcing plates come into contact with the inner plates to restrict the front and rear plates from swinging and prevent the front and rear plates from opening outward, thereby stabilizing the strength of the box and improving the aesthetic appearance of the box. Furthermore, because the bent portions between the front and rear connecting plates and the reinforcing plates are curved, even if a force acts on the front and rear connecting plates to open them outward, the reinforcing plates can maintain an angled position relative to the front and rear connecting plates and can be braced between the inner and outer plates.

[0031] Furthermore, according to the fourteenth and fifteenth inventions, in addition to the effects of the tenth to thirteenth inventions, by forming the stacked state of the inner and outer panels into the primary assembly, the left and right side panels and the front and rear outer panels are erected, and the inner panel of the front panel and the inner panel of the rear panel are erected within the box body, making assembly even easier.

[0032] [Brief explanation of the drawings]

[0033] [Figure 1] 1 is a plan view showing an unfolding sheet 2 of a packaging box 1 according to a first embodiment. [Figure 2] 1A to 1C are plan views showing a production process of a primary assembly of the packing box 1 of the first embodiment. [Figure 3] 1 is a plan view showing a form of a primary assembly of a packing box 1 according to a first embodiment. [Figure 4] FIG. 2 is a plan view showing the development sheet 4 of the holder 3 of the first embodiment. [Figure 5] FIG. 2 is a simplified perspective view showing the assembled state of the holder 3 of the first embodiment. [Figure 6] 3 is a simplified perspective view showing a final assembly process of the packing box 1 of the first embodiment. FIG. [Figure 7] 3 is a simplified perspective view showing a final assembly process of the packing box 1 of the first embodiment. FIG. [Figure 8] 3 is a simplified perspective view showing a final assembly process of the packing box 1 of the first embodiment. FIG. [Figure 9] 3 is a simplified perspective view showing a final assembly process of the packing box 1 of the first embodiment. FIG. [Figure 10] FIG. 2 is an enlarged plan view of a portion near a flap receiving portion 27 of the unfolded sheet 2 according to the first embodiment. [Figure 11] 10 is an end view taken along line AA in FIG. 9, omitting the contents (wine bottle) of the first embodiment. [Figure 12] 10 is another embodiment of the first embodiment. [Figure 13] FIG. 10 is a plan view showing the unfolding sheet 5 of the packaging box 111 of the second embodiment. [Figure 14] FIG. 10 is a plan view showing a form of a primary assembly of a packing box 111 according to a second embodiment. [Figure 15] FIG. 10 is a simplified perspective view showing a final assembly process of the packing box 111 according to the second embodiment. [Figure 16] FIG. 10 is a plan view showing the unfolding sheet 6 of the packaging box 211 of the third embodiment. [Figure 17] FIG. 11 is a plan view showing a form of a primary assembly of a packing box 211 according to a third embodiment. [Figure 18] FIG. 10 is a simplified perspective view showing a final assembly process of the packing box 211 according to the third embodiment. [Figure 19] FIG. 10 is a simplified perspective view showing a final assembly process of the packing box 211 according to the third embodiment. [Figure 20] FIG. 10 is a simplified perspective view showing a reinforcing plate 245 of a packing box 211 according to a third embodiment. [Figure 21] FIG. 10 is a plan view showing the unfolding sheet 7 of the packing box 311 of the fourth embodiment. [Figure 22] FIG. 10 is a plan view showing a form of a primary assembly of a packing box 311 according to a fourth embodiment. [Figure 23] FIG. 10 is a simplified perspective view showing a final assembly process of the packing box 311 according to the fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0034] Next, an embodiment of the present invention will be described. First, the primary assembly in this embodiment refers to the form in which the unfolded sheet for creating a packaging box is folded, etc., and then transported and stored. Furthermore, the final assembly refers to the form in which the packaging box is finally assembled from the primary assembly when it is used. In the present embodiment, the folding portion refers to a crease-like portion provided for folding the unfolded sheet. Examples of the folding portion include a crease, a cut line, a perforation line, etc., and are shown by dashed lines.

[0035] The packaging box 1 in the first embodiment is for storing two wine bottles, and is used together with a holder 3, which will be described later. As shown in Figures 8 and 9, the final assembly of the packaging box 1 comprises a front panel 12a, a rear panel 12b, a left panel 18a, and a right panel 18b, which are erected around the central panel 11, forming an opening at the top. The opening is closed by a left top panel 22a connected to the left panel 18a and a right top panel 22b connected to the right panel 18b. A left insertion panel 23a connected to the left top panel 22a and a right insertion panel 23b connected to the right top panel 22b hang down from the main box body, dividing the interior of the main box body and strengthening the packaging box's resistance to pressure from above. The left insertion panel 23a and the right insertion panel 23b are inserted between the two wine bottles, and their free edges contact the bottle body support portion 31 of the holder 3 (described later) to support the left top panel 22a and the right top panel 22b.

[0036] For the sake of explanation, the short sides of the central plate 11 will be referred to as the front and rear sides, and the long sides of the central plate 11 will be referred to as the left and right sides. In addition, when the packaging box is assembled and placed with the central plate 11 facing downwards, the vertical direction will be referred to as the central plate 11 side being the bottom and the opening side being the top.

[0037] First, the steps up to the formation of the primary assembly of the packing box 1 according to this embodiment will be described with reference to FIGS. 1 to 3. FIG. The packaging box 1 according to this embodiment is formed by assembling the unfolded sheets 2 shown in Fig. 1. The packaging box 1 can be formed from thick paper such as cardboard or corrugated cardboard, but in this embodiment, a corrugated cardboard sheet with a thickness of 1.5 mm is used. The front side of the unfolded sheet shown in Fig. 1 is shown as the inner side of the box.

[0038] The development sheet 2 will now be described. The central plate 11 of the development sheet 2 is square, and in this embodiment the central plate 11 is rectangular, but the central plate 11 may also be square.

[0039] A front side plate 12a is connected to the front edge of the central plate 11. The front side plate 12a is composed of an outer plate 13a and an inner plate 14a, and the outer plate 13a is connected to the front edge of the central plate 11 via a bent portion, and a front upper plate 15a is connected to the outer plate 13a via a bent portion. On the side opposite to the side to which the front upper plate 15a is connected, the inner plate 14a is connected via a bent portion. A rear side plate 12b is connected to the rear edge of the central plate 11. The rear side plate 12b is composed of an outer plate 13b and an inner plate 14b, and the outer plate 13b is connected to the rear edge of the central plate 11 via a bent portion, and a rear upper plate 15b is connected to the outer plate 13b via a bent portion. On the opposite side to the side to which the rear upper plate 15b is connected, the inner plate 14b is connected via a bent portion. Near the center of the inner plate 14a, a substantially U-shaped notch 16 is formed. This notch 16 is the portion into which a protrusion 25, which will be described later, is inserted when the opening is closed. Finger holes are cut into the front edge of the inner plate 14a and the rear edge of the inner plate 14b, and are used to disassemble the assembly by hooking a finger through them and pulling the box inwards after it has been finally assembled. The left and right sides of the inner plate 14a and the inner plate 14b are provided with protrusions 17 that protrude outward to the left and right. The protrusions 17 abut against the insides of the left and right side plates 18a, 18b in the final assembly process described below, thereby holding the front and rear side plates 12a, 12b and the left and right side plates 18a, 18b upright.

[0040] A left side plate 18a is connected to the left side of the central plate 11 via a bent portion, and a right side plate 18b is connected to the right side of the central plate 11 via a bent portion. Furthermore, a front connecting plate 19a is connected to the left edge of the adjacent outer panel 13a and the front edge of the left panel 18a, and to the right edge of the adjacent outer panel 13a and the front edge of the right panel 18b. A rear connecting plate 19b is connected to the left edge of the adjacent outer panel 13b and the rear edge of the left panel 18a, and to the right edge of the adjacent outer panel 13b and the rear edge of the right panel 18b. The front connecting plate 19a and the rear connecting plate 19b are formed with a diagonal fold 20. In this embodiment, the fold 20 has a curved cut shape near the center, with both ends intermittently cut, but it may also be a simple perforation or crease. The front connecting plate 19a and the rear connecting plate 19b are formed to fold from the fold 20 when the front and rear side panels 12a, 12b and the left and right side panels 18a, 18b are erected relative to the center panel 11. In addition, the front connecting plate 19a has an adhesive portion 21 on the side adjacent to the outer plate 13a, and the rear connecting plate 19b has an adhesive portion 21 on the side adjacent to the outer plate 13b. The adhesive portion 21 has a plurality of fine cut lines to allow the adhesive to easily penetrate.

[0041] A left top plate 22a is connected to the left side of the left side plate 18a via a bent portion, and a right top plate 22b is connected to the right side of the right side plate 18b via a bent portion. An insertion plate 23a is connected to the left side of the left top plate 22a via a bent portion, and an insertion plate 23b is connected to the right side of the right top plate 22b via a bent portion. The left insertion plate 23a and the right insertion plate 23b are provided on their rear sides with short insertion plates 24. The short insertion plates 24 are inserted between the flaps 42 of the holder 3, which will be described later, when the opening is in a closed state. The left insertion plate 23a and the right insertion plate 23b are provided on their front edges with protrusions 25. The protrusions 25 are portions that are inserted into the notches 16 when the opening is in the closed state.

[0042] In addition, a flap plate 26 is formed by cutting the right insertion plate 23b in a curved shape near the bent portion between the right top plate 22b and the right insertion plate 23b. Furthermore, the left top panel 22a is cut near the bend between the left top panel 22a and the left insertion panel 23a to form a flap receiving portion 27 and a finger notch 28. More specifically, as shown in Figure 10, the base end of the flap receiving portion 27 is located 1.5 mm closer to the left insertion panel 23a than the bend between the left top panel 22a and the left insertion panel 23a at both the front and rear ends. The finger notch 28 is formed on the opposite side of the base end of the flap receiving portion 27. The notches that form the flap receiving portion 27 and the finger notch 28 have intermittent joints (not shown).

[0043] Next, the process of assembling the deployment sheet 2 into a primary assembly will be described. 2, the bent portion between the central plate 11 and the left side plate 18a is bent to fold the left side plate 18a onto the inner surface of the central plate 11, and the bent portion between the left edge of the outer plate 13a and the front connecting plate 19a is bent to fold the front connecting plate 19a onto the inner surface of the outer plate 13a, and adhesive is applied to the adhesive portion 21 to secure them. Also, the bent portion between the left side of the outer plate 13b and the rear connecting plate 19b is bent to fold the rear connecting plate 19b onto the inner surface of the outer plate 13b, and adhesive is applied to the adhesive portion 21 to secure them. Furthermore, the bent portion between the left side plate 18a and the left top plate 22a is bent, and the left top plate 22a is folded over onto the outer surface of the left side plate 18a. The bent portion between the central plate 11 and the right side plate 18b is then bent, and the right side plate 18b is then folded onto the inner surface of the central plate 11. The bent portion between the right edge of the outer plate 13a and the front connecting plate 19a is then bent, and the front connecting plate 19a is then folded onto the inner surface of the outer plate 13a, and adhesive is applied to the adhesive portion 21 to secure them together. The bent portion between the right edge of the outer plate 13b and the rear connecting plate 19b is then bent, and the rear connecting plate 19b is then folded onto the inner surface of the outer plate 13b, and adhesive is applied to the adhesive portion 21 to secure them together. Furthermore, the bent portion between the right side plate 18b and the right top plate 22b is bent, and the right top plate 22b is folded over onto the outer surface of the right side plate 18b.

[0044] 3, the bent portions between the outer panel 13a and the front upper panel 15a and the bent portions between the front upper panel 15a and the inner panel 14a are folded to overlap the inner panel 14a and the outer panel 13a, and the bent portions between the outer panel 13b and the rear upper panel 15b and the bent portions between the rear upper panel 15b and the inner panel 14b are folded to overlap the inner panel 14b and the outer panel 13b. In this state, a front connecting plate 19a is sandwiched between the inner panel 14a and the outer panel 13a of the front panel 12a, and a rear connecting plate 19b is sandwiched between the inner panel 14b and the outer panel 13b of the rear panel 12b. In this way, the primary assembly is completed.

[0045] Next, a description will be given of the holder 3 used in this embodiment together with the packaging box 1. The holder 3 is formed by assembling the development sheets 4 shown in FIG. The holder 3 can be made of thick paper such as cardboard or corrugated cardboard, but in this embodiment, a corrugated cardboard sheet having a thickness of 1.5 mm, similar to the packaging box 1, is used. The front side of the spread sheet shown in FIG. 4 is shown as the surface on which the wine bottle is placed.

[0046] When fully assembled, the holder 3 consists of a bottle body placement portion 31 and a bottle neck holding portion 33, as shown in Figure 5, and holds the neck of the wine bottle using the hole 40 and flap plate 41 of the bottle neck holding portion 33.

[0047] First, the development sheet 4 will be described. A riser plate 34 is connected to the rear edge of the bottle body mounting portion 31 of the spreading sheet 4 via a bent portion. A top plate 35 is connected to the rear edge of the riser plate 34 via a bent portion. A riser plate 36 is connected to the rear edge of the top plate 35 via a bent portion. A bottom plate 37 is connected to the rear edge of the riser plate 36 via a bent portion. A laminated plate 38 is connected to the rear edge of the bottom plate 37 via a bent portion. Side plates 39 are connected to the left and right edges of the top plate 35 via bent portions. The bottle body placing portion 31 is provided with a flap plate 32. The rising plates 34 and 36 have holes 40 on the top plate 35 side. The top plate 35 has flap plates 41 and 42 formed by cutouts. The flap plate 41 and the adjacent hole 40 are portions that hold the neck of the wine bottle. The flap plate 42 and the adjacent hole 40 are portions that hold the short insertion plate 24 of the packaging box 1. A cutout 43 is formed on the rear edge of the overlapping plate 38. The cutout 43 is cut so as to correspond to the hole 40 of the rising plate 34 when the holder 3, which will be described later, is in a completed assembled state.

[0048] The steps for forming the primary assembly of the development sheet 4 and the assembly thereof will now be described. To form the primary assembly, the fold between the riser plate 36 and the top plate 35 is folded, and then the fold between the riser plate 34 and the top plate 35 is folded to bond the riser plate 34 and the laminated plate 38 together. To perform final assembly from the primary assembly, the bent portion between the bottle body mounting portion 31 and the rising plate 34 is bent, the rising plate 34 is raised relative to the bottle body mounting portion 31, and the bent portions between the rising plate 34 and the top plate 35, the bent portion between the top plate 35 and the rising plate 36, the bent portion between the rising plate 36 and the bottom plate 37, and the bent portion between the bottom plate 37 and the overlapping plate 38 are each bent at an angle to assemble the rising plate 34, the top plate 35, the rising plate 36, and the bottom plate 37 into a cylindrical shape. The bent portion between the top plate 35 and the side plate 39 is then bent to hang the side plate 39 down, sealing both ends of the cylindrical shape. Finally, the holding flap 32 is folded up, resulting in the completed assembly shown in FIG. 5.

[0049] Next, the process of finally assembling the primary assembly of the packaging box 1 to obtain a completed assembly product will be described with reference to FIGS. To use the packaging box 1, the left top panel 22a or the left insertion panel 23a of the primary assembly is pulled to the left, and simultaneously the right top panel 22b or the right insertion panel 23b is pulled to the right. That is, the left top panel 22a and the right top panel 22b are pulled outward from the box, i.e., in the direction of the left and right arrows in FIG. 6 , which separates them. This causes the left and right panels 18a and 18b to rise up relative to the central panel 11. In conjunction with this, the diagonal folding portions 20 of the front connecting panel 19a and the rear connecting panel 19b bend, causing the fixed outer panels 13a and 13b to rise up in conjunction. Alternatively, the front and rear outer panels 13a and 13b can be pushed toward the inner surface of the box to rise up relative to the central panel 11. Then, in conjunction with this, the bent portions 20 provided in the diagonal direction of the front connecting plate 19a and the rear connecting plate 19b bend, and the left side plate 18a and the right side plate 18b rise up in conjunction with each other. Here, because the inner panel 14a and outer panel 13a of the front panel 12a overlap, and the inner panel 14b and outer panel 13b of the rear panel 12b overlap, as the left panel 18a, right panel 18b, and outer panels 13a and 13b rise, the inner panels 14a and 14b also rise relative to the center panel 11. When pulling the left top panel 22a or the left insertion panel 23a to the left and the right top panel 22b or the right insertion panel 23b to the right, if the pulling is strong enough to bend the cardboard outward, the protrusions 17 formed on the left and right edges of the inner panels 14a and 14b will fit between the inner surface of the left panel 18a and the inner surface of the right panel 18b, and if the pulling is weakened, the protrusions 17 will be taut and fixed, maintaining the upright state. When pushing the front outer panel 13a and the rear outer panel 13b toward the inside of the box to make them stand up relative to the central panel 11, the standing inner panel 14a, 14b can be simply pushed toward the outside of the box to tension and secure the protrusions 17. Then, the front connecting panel 19a is sandwiched between the outer panel 13a and the inner panel 14a of the front panel 12a, and the rear connecting panel 19b is sandwiched between the outer panel 13b and the inner panel 14b of the rear panel 12b, thereby holding the front panel 12a, the rear panel 12b, the left panel 18a, and the right panel 18b upright relative to the central panel 11, thereby forming the box main body very easily. At this time, the left top panel 22a and the right top panel 22b are open toward the outside of the box main body and the opening is open, so that the left top panel 22a and the right top panel 22b do not get in the way when fixing the inner panel 14a, 14b, and assembly can be easily performed.

[0050] Then, as shown in FIG. 7, the holder 3 is placed through the opening of the assembled box body so that the bottle neck holding part 33 is positioned at the rear. To store a wine bottle, place the neck of the wine bottle on the flap 41 and hole 40 of the holder 3, and the flap 41 will bend to the size of the bottle neck, storing the bottle neck in the bottle neck holding section 33, and the bottle body will be placed on the bottle body placing section 31. The holding flap 32 holds the bottle body.

[0051] To close the opening after the wine bottles are placed inside, as shown in Figures 8 and 9, first bend the left top panel 22a and the left insert panel 23a inward at an angle from the bend between them. Next, bend the left top panel 22a from the bend between the left top panel 22a and the left side panel 18a to close the left side of the opening of the box body. At this time, the left insert panel 23a is positioned hanging down between the two wine bottles placed inside the box body. The free edge of the insert panel 23a, excluding the short insert panel 24, is in contact with the bottle body support section 31 of the holder 3. The short insert panel 24 is inserted between the flaps 42 of the holder 3. At this time, the protrusion 25 on the left insert panel 23a is inserted into the notch 16 on the inner panel 14a, maintaining the closed state. Similarly, right insertion plate 23b is bent inward at an angle relative to right top plate 22b from the bend between right top plate 22b and right insert plate 23b, and then bent from the bend between right top plate 22b and right side panel 18b, closing the right side of the opening of the box body with right top plate 22b. At this time, right insert plate 23b is also positioned hanging down between the two stored wine bottles. The free edge of right insert plate 23b, excluding short insert plate 24, is in contact with bottle body support portion 31 of holder 3. Short insert plate 24 is inserted between flap plates 42 of holder 3. At this time, protrusion 25 on right insert plate 23b is inserted into notch 16 on inner panel 14a, maintaining the closed state. During this closing operation, the front side panel 12a, rear side panel 12b, left side panel 18a, and right side panel 18b are maintained in an upright position, eliminating the difficulty of having to support the upright position with one's hands. Furthermore, left insertion plate 23a and right insertion plate 23b hang down from left top plate 22a and right top plate 22b in the center of the box body, with their free edges positioned in contact with bottle body placement section 31, thereby strengthening the pressure resistance from above in packaging box 1 and holding wine bottles to prevent collisions between wine bottles.

[0052] Furthermore, when the right insertion plate 23b is bent inward at an angle from the bend between the right top plate 22b and the right insertion plate 23b, the curved cut portion of the right insertion plate 23b separates from the right insertion plate 23b, and a flap plate 26 extending from the right top plate 22b is connected. Furthermore, when left insertion plate 23a is bent inward at an angle from the bend between left top plate 22a and left insertion plate 23a, the cut-out portion of left top plate 22a, which has a connecting portion with left top plate 22a, bends together and separates from left top plate 22a to form flap receiving portion 27. At this time, as shown in Figure 10, the base end of flap receiving portion 27 is formed 1.5 mm toward left insertion plate 23a from the bend between left top plate 22a and left insertion plate 23a on both ends, and flap receiving portion 27 has a step recessed 1.5 mm from the surface of left top plate 22a. When the opening is closed by the left top panel 22a and the right top panel 22b, the flap panel 26 is positioned so as to overlap the flap receiving portion 27. The flap panel 26, which is 1.5 mm thick, is housed in the flap receiving portion 27, which has a step recessed 1.5 mm from the surface of the left top panel 22a, and the outer surface of the flap panel 26 and the outer surface of the left top panel 22a are positioned on approximately the same plane. The flap receiving portion 27 has a finger notch 28 that continues from the portion where the flap plate 26 fits, making it easier to hook a finger on the flap plate 26, and has a step that is recessed 1.5 mm from the outer surface of the left top panel 22a. When opening the packaging box, inserting a finger into this finger notch pushes the flap receiving portion 27 downward, allowing the flap plate 26 to be easily pulled up. In this way, the outer surface of the flap 26 and the outer surface of the left top panel 22a are positioned on approximately the same plane, so the flap 26 does not protrude from the left top panel 22a, resulting in an excellent aesthetic appearance.

[0053] In order to confirm the ease of assembling the packaging box 1, when flat unfoldable sheets 2 and 4 that had not been subjected to folding or fastening (adhesion) processing were folded at the folding portions to complete the assembly, the time required to assemble 10 packaging boxes was 11 minutes 32 seconds. When the primary assembly of the packaging box 1 according to this embodiment and the primary assembly of the holder 3 were assembled to complete the assembly, the time required to assemble 10 packaging boxes was 3 minutes 15 seconds, which significantly reduced the time required to assemble the packaging boxes.

[0054] Although the first embodiment has been described above, the present invention is not limited to these embodiments. For example, in the first embodiment, the holder 3 is provided in the packaging box 1, but the effects of the present invention can be achieved even without the holder. When a holder is provided, its shape can be freely changed depending on the contents to be stored. Furthermore, in the first embodiment, the left insertion plate 23a and the right insertion plate 23b are arranged between two wine bottles, but for example, as shown in Figure 12, three wine bottles may be stored and the left insertion plate 23a and the right insertion plate 23b may be arranged between wine bottles one and two.

[0055] In addition, the second embodiment has a form such as a packaging box 111, for example. The packaging box 111 is formed by folding the folding portion of the development sheet 5 shown in Fig. 13 to form the primary assembly shown in Fig. 14. Explanation of the same parts as those of the packaging box 1 will be omitted. This packaging box 111 does not have a left insertion plate 23a or a right insertion plate 23b, but has a left top plate 122a that closes the left side and a right top plate 122b that closes the entire opening, and in the primary assembled state, the left top plate 122a is folded over the outer surface of the left side plate 18a, and the right top plate 122b is folded over the outer surface of the right side plate 18b. During final assembly of the primary assembly of this packaging box 111, as shown in FIG. 15, the left top panel 122a is pulled to the left, and simultaneously the right top panel 122b is pulled to the right. That is, the left top panel 122a and the right top panel 122b are pulled outward from the box, i.e., in the direction of the left and right arrows in FIG. 15, so that they move apart. Alternatively, the front outer panel 13a and the rear outer panel 13b are pushed toward the inner surface of the box to stand up relative to the central panel 11. Then, in conjunction with this, the diagonal folding portions 20 of the front connecting panel 19a and the rear connecting panel 19b are folded, so that the left panel 18a and the right panel 18b stand up in conjunction with each other. Once the front inner panel 14a and the rear panel 14b are fixed to the inner surface of the box, the box main body can be formed extremely easily. At this time, the left top plate 122a and the right top plate 122b are opened to the outside of the box body, and the opening is open, so that the left top plate 122a and the right top plate 122b do not get in the way when fixing the inner plates 14a, 14b, and assembly can be easily performed. To close the opening, fold the bent portion between the left side panel 18a and the left top panel 122a to close the left side of the opening with the left top panel 122a, fold the bent portion between the right side panel 18b and the right top panel 122b to close the opening with 122b, place it on the outer surface of the left top panel 122a, and insert the flap panel 126 into the flap receiving portion 127.

[0056] Furthermore, for example, the packaging box 111 may be primarily assembled in a state in which the right top panel 122b is placed on top of the left top panel 122a that is folded over the left side panel 18a, without being folded over the outer surface of the right side panel 18b. In this case, in the final assembly process, the right top panel 122a is folded over the outer surface of the right side panel 18b at the bend between the right top panel 122b and the right side panel 18b, and then pulled to the left and the right top panel 122b is pulled to the right, so that the left side panel 18a, right side panel 18b, front panel 12a, and rear panel 12b rise up relative to the center panel 11 in an interlocking manner.

[0057] In addition, in the packaging box 111 of this embodiment, the left top panel 122a is connected to the left side panel 18a, but the effects of the present invention can be achieved even if the left top panel 122a is not provided, as long as the right top panel 122b is folded over the right side panel 18b in the primary assembly state. In this case, if the right top panel 122b is pulled outward, the right side panel 18b connected to the right top panel 122b will easily rise, and in conjunction with this, the front side panel 12a, the rear side panel 12b, and the left side panel 18a to which the top panel 122a is not connected will also rise.

[0058] The third embodiment has a form such as a packaging box 211, for example. The packaging box 211 is formed by folding the folding portion of the unfolded sheet 6 shown in Fig. 16 to form the primary assembly shown in Fig. 17. Explanation of the same parts as those of the packaging boxes 1 and 111 will be omitted. The unfolding sheet 6 has a top plate 222 that closes the entire opening and is connected to the right side of the right side plate 18b via a bent portion, and an end plate 247 that is connected to the right side of the top plate 222 via a bent portion. An inner plate 244 is connected to the left side of the left side plate 18a via a bent portion. Furthermore, the left front connecting plate 19a has a front reinforcing plate 245a connected to its left side via a bent portion. The right front connecting plate 19a has a front reinforcing plate 245a connected to its right side via a bent portion. The left rear connecting plate 19b has a reinforcing plate 245b connected to its left side via a bent portion. The right rear connecting plate 19b has a reinforcing plate 245b connected to its right side via a bent portion. The bent portion between the front connecting plate 19a and the reinforcing plate 245a is curved in a convex shape toward the front connecting plate 19a. The bent portion between the rear connecting plate 19b and the reinforcing plate 245b is curved in a convex shape toward the front connecting plate 19b. The free edges of the reinforcing plates 245a and 245b are formed in roughly the same shape as the curved bent portions. Further, a pressing plate 246 is connected to the front edge of the inner plate 14a and the rear edge of the inner plate 14b via a bent portion and a notch.

[0059] In the primary assembled state where the folding portion of the unfolding sheet 6 is folded, as shown in FIG. 17, the top plate 222 is folded onto the outer surface of the right side plate 18b, and the inner plate 244 is folded onto the outer surface of the left side plate 18a. When the primary assembly of this packaging box 211 is finally assembled, as shown in Fig. 18, the top plate 222 is pulled to the right, and at the same time, the inner plate 244 is pulled to the left. That is, the top plate 222 and the inner plate 244 are pulled outward from the box, in a direction that separates them (pulled in the direction of the left and right arrows in Fig. 18). Then, similar to the packaging boxes 1 and 111, the left side plate 18a, the right side plate 18b, the front side plate 12a, and the rear side plate 12b interlock and rise relative to the central plate 11. Alternatively, if the front outer plate 13a and the rear outer plate 13b are pushed toward the inner side of the box to rise relative to the central plate 11, the left side plate 18a and the right side plate 18b interlock and rise relative to the central plate 11. 19, the bent portions are bent to overlap the inner plate 244 on the inside of the left side plate 18a. The box main body can be formed extremely easily by bending the bent portions between the inner plate 14a and the pressure plate 246 and between the inner plate 14b and the pressure plate 246 at angles and overlapping the pressure plate 246 on the center plate 11. At this time, the top plate 222 and the inner plate 244 are open to the outside of the box main body and the opening is open, so that the top plate 222 and the inner plate 244 do not get in the way when fastening the inner plates 14a and 14b, allowing for easy assembly. Then, the opening can be closed by bending the bent portion between the right side plate 18b and the top plate 222, bending the bent portion between the top plate 222 and the end plate 247, and inserting the end plate 247 between the inner plate 244 and the edge of the inner plates 14a and 14b.

[0060] 20 , in this state, the reinforcing plate 245a is bent at an angle relative to the front connecting plate 19a, and is positioned between the inner panel 14a and the outer panel 13a of the front panel 12a and below the front upper panel 15a, with its free end contacting the inner panel 14a. The reinforcing plate 245b is bent at an angle relative to the front connecting plate 19b, and is positioned between the inner panel 14b and the outer panel 13b of the rear panel 12b and below the rear upper panel 15b, with its free end contacting the inner panel 14b. In other words, the reinforcing plate 245a braces itself between the inner panel 14a and the outer panel 13a, and the reinforcing plate 245b braces itself between the inner panel 14b and the outer panel 13b, restricting the swinging of the front panel 12a and the rear panel 12b and preventing the front panel 12a and the rear panel 12b from opening outward, thereby stabilizing the strength of the box and maintaining the aesthetic appearance of the box. Furthermore, because the bent portions between the front connecting plate 19a and the reinforcing plate 245a and between the front connecting plate 19b and the reinforcing plate 245b are curved, the reinforcing plates 245a and 245b have a concave, warped shape in this state. Therefore, even if a force acts on the front and rear connecting plates 12a and 12b to open them outward from the box, the reinforcing plates 245a and 245b maintain an angled position relative to the front connecting plate 19a and the rear connecting plate 19b, with the reinforcing plate 245a bracing between the inner and outer panels 14a and 13a, and the reinforcing plate 245b bracing between the inner and outer panels 14b and 13b.

[0061] In the above-described packaging box 211, the inner plate 244 is folded onto the outer surface of the left plate 18a, but the primary assembly may be such that, for example, the top plate 222 is folded onto the outer surface of the right plate 18b, and the inner plate 244 is not folded onto the outer surface of the left plate 18a. In this case, in the final assembly process, the top plate 222 is pulled to the right to raise the left plate 18a, inner plate 244, right plate 18b, front plate 12a, and rear plate 12b in a linked manner from the center plate 11, and then the inner plate 244 is placed inside the left plate 18a.

[0062] The fourth embodiment may take the form of a packaging box 311, for example. The packaging box 311 is formed by folding the folding portion of the unfolded sheet 7 shown in Fig. 21 to form the primary assembly shown in Fig. 22. Explanation of the same parts as those of the packaging boxes 1, 111, 211 will be omitted. As with the packaging box 211 of the third embodiment, the unfolding sheet 7 has a top plate 222 that closes the entire opening via a bent portion on the right side of the right side plate 18b, and an inner plate 244 that closes the entire opening via a bent portion on the left side of the left side plate 18a.

[0063] In the primary assembly state where the folding portion of the unfolding sheet 7 is folded, as shown in FIG. 22, the top plate 222 is folded onto the outer surface of the right side plate 18b, and the inner plate 244 is folded onto the inner surface of the left side plate 18a and fixed with adhesive. 23, when the primary assembly of this packaging box 311 is finally assembled, by pulling the top plate 222 to the right, the front plate 12a, the rear plate 12b, the left plate 18a, and the right plate 18b rise up relative to the central plate 11 in an interlocking manner, similar to the packaging boxes 1, 111, and 211, and the box main body can be formed extremely easily. Alternatively, by pushing the front outer plate 13a and the rear outer plate 13b toward the inner surface of the box to rise up relative to the central plate 11, the left plate 18a and the right plate 18b rise up relative to the central plate 11 in an interlocking manner, and the box main body can be formed extremely easily.

[0064] The technical scope of the present invention broadly covers the entire range of the technical idea truly intended by the invention that becomes clear from the matters described in this specification and the drawings. [Explanation of symbols]

[0065] 1 Packaging box 2. Deployment sheet 3 Holder 4 Deployment sheet 5. Deployment sheet 6. Deployment sheet 7. Deployment Sheet 11 Center plate 12a Front plate 12b Back side plate 13a Outer plate 13b Outer plate 14a inner board 14b Inner plate 15a Front upper board 15b Rear upper plate 16 Cutting 17 Protrusion 18a Left side plate 18b Right side plate 19a Front connection plate 19b Rear connecting plate 20 Cutout 21 Adhesive part 22a Left top plate 22b Right top plate 23a Left insertion plate 23b Right insertion plate 24 Short Insertion Plate 25 Protrusion 26 Flap board 26a Notch 27 Flap receiving part 28 Finger notch 31 Bottle body placement section 32 Retaining flap 33 Bottle neck holder 34 Raising board 35 Top plate 36 Raising board 37 Bottom plate 38 Polymer Plate 39 Side Panel 40 Hole 41 Flap board 42 Flap board 43 Cutting 111 Packaging boxes 122a Left top plate 122b Right top plate 126 Flap board 127 Flap receiving part 211 Packaging boxes 222 Top plate 244 Inner plate 245a Front reinforcement plate 245b Rear reinforcement plate 246 Retaining plate 247 End plate 311 Packaging boxes

Claims

1. a front side plate consisting of an inner plate and an outer plate at the front edge of a square central plate; a rear side plate consisting of an inner plate and an outer plate at the rear edge of the central plate; a left side plate on the left side of the central plate; a right side plate on the right side of the center plate; a front connecting plate between the left side edge of the outer plate of the adjacent front side plate and the front side edge of the left side plate, and between the right side edge of the outer plate of the adjacent front side plate and the front side edge of the right side plate; a rear connecting plate between the left side edge of the outer plate of the adjacent rear plate and the rear side edge of the left side plate, and between the right side edge of the outer plate of the adjacent rear plate and the rear side edge of the right side plate; A left top plate is attached to the left side of the left side plate. a right top plate on the right side of the right side plate; The folded portions of the unfolded sheets are connected together via the folded portions, and the folded portions are folded, the front connecting plate is sandwiched between the inner plate and the outer plate of the front plate; The rear connecting plate is sandwiched between the inner plate and the outer plate of the rear plate, A packaging box in which the front side plate, the rear side plate, the left side plate, and the right side plate are erected relative to the central plate to form a box main body portion with an opening at the top, and the opening is closed by the left top plate and the right top plate, The folding portion of the unfolded sheet is folded, the left side plate and the right side plate are placed on the inner surface of the center plate; The front connecting plate is overlapped and fixed to the inner surface of the outer plate of the front side plate, the rear connecting plate is overlapped and fixed to the inner surface of the outer plate of the rear plate; The packaging box is characterized in that the left top plate is overlapped on the outer surface of the left side plate and / or the right top plate is overlapped on the outer surface of the right side plate to form a primary assembly.

2. 2. The packaging box according to claim 1, wherein an insertion plate is connected to a free end edge of at least one of the left top plate and the right top plate via a bending portion, and when the opening is closed, the bending portion is bent to cause the insertion plate to hang down from the top plate and be positioned inside the box body.

3. 3. The packaging box according to claim 1, wherein a reinforcing plate is provided at an end edge of each of the front connecting plate and the rear connecting plate via a curved bent portion, and when the assembly of the packaging box is completed, the reinforcing plate comes into contact with the inner plate to restrict the swinging of the front plate and the rear plate.

4. 3. The packaging box according to claim 1, wherein the outer and inner panels of the front panel and the inner and outer panels of the rear panel are stacked together to form a primary assembly.

5. 4. The packaging box according to claim 3, wherein a primary assembly is formed by stacking the outer and inner panels of the front panel and the inner and outer panels of the rear panel.

6. A flap plate is formed on one of the left top plate and the right top plate, and a flap receiving portion having a step recessed from the outer surface of the top plate is formed on the other.

3. A packaging box according to claim 1, wherein the outer surface of the flap plate and the outer surface of the top plate are positioned on approximately the same plane by fitting the flap plate into the flap receiving portion when the opening is closed.

7. A flap plate is formed on one of the left top plate and the right top plate, and a flap receiving portion having a step recessed from the outer surface of the top plate is formed on the other.

4. The packaging box according to claim 3, wherein the outer surface of the flap and the outer surface of the top plate are positioned on approximately the same plane by fitting the flap plate in the flap receiving portion when the opening is closed.

8. A flap plate is formed on one of the left top plate and the right top plate, and a flap receiving portion having a step recessed from the outer surface of the top plate is formed on the other.

5. The packaging box according to claim 4, wherein when the opening is closed, the flap plate is placed in the flap receiving portion so that the outer surface of the flap plate and the outer surface of the top plate are positioned on approximately the same plane.

9. A flap plate is formed on one of the left top plate and the right top plate, and a flap receiving portion having a step recessed from the outer surface of the top plate is formed on the other.

6. The packaging box according to claim 5, wherein when the opening is closed, the flap plate is placed in the flap receiving portion so that the outer surface of the flap plate and the outer surface of the top plate are positioned on approximately the same plane.

10. a front side plate consisting of an inner plate and an outer plate at the front edge of a square central plate; a rear side plate consisting of an inner plate and an outer plate at the rear edge of the central plate; a left side plate on the left side of the central plate; a right side plate on the right side of the center plate; a front connecting plate between the left side edge of the outer plate of the adjacent front side plate and the front side edge of the left side plate, and between the right side edge of the outer plate of the adjacent front side plate and the front side edge of the right side plate; a rear connecting plate between the left side edge of the outer plate of the adjacent rear plate and the rear side edge of the left side plate, and between the right side edge of the outer plate of the adjacent rear plate and the rear side edge of the right side plate; a top plate on either the left side of the left side plate or the right side of the right side plate; The folded portions of the unfolded sheets are connected together via the folded portions, and the folded portions are folded, the front connecting plate is sandwiched between the inner plate and the outer plate of the front plate; The rear connecting plate is sandwiched between the inner plate and the outer plate of the rear plate, A packaging box in which the front side plate, the rear side plate, the left side plate, and the right side plate are erected relative to the central plate to form a box main body portion with an opening at the top, and the opening is closed by the top plate, The folding portion of the unfolded sheet is folded, the left side plate and the right side plate are placed on the inner surface of the center plate; The front connecting plate is overlapped and fixed to the inner surface of the outer plate of the front side plate, the rear connecting plate is overlapped and fixed to the inner surface of the outer plate of the rear plate; The packaging box is characterized in that the primary assembly is formed by overlapping the top plate on the outer surface side of the left side plate when the top plate is connected to the left side plate, and overlapping the top plate on the outer surface side of the right side plate when the top plate is connected to the right side plate.

11. a front side plate consisting of an inner plate and an outer plate at the front edge of a square central plate; a rear side plate consisting of an inner plate and an outer plate at the rear edge of the central plate; a left side plate on the left side of the central plate; a right side plate on the right side of the center plate; An inner plate is attached to either the left side of the left side plate or the right side of the right side plate, and a top plate is attached to the other side. a front connecting plate between the left side edge of the outer plate of the adjacent front side plate and the front side edge of the left side plate, and between the right side edge of the outer plate of the adjacent front side plate and the front side edge of the right side plate; a rear connecting plate between the left side edge of the outer plate of the adjacent rear plate and the rear side edge of the left side plate, and between the right side edge of the outer plate of the adjacent rear plate and the rear side edge of the right side plate; The folded portions of the unfolded sheets are connected together via the folded portions, and the folded portions are folded, the front connecting plate is sandwiched between the inner plate and the outer plate of the front plate; The rear connecting plate is sandwiched between the inner plate and the outer plate of the rear plate, A packaging box in which the front side plate, the rear side plate, the left side plate, and the right side plate are erected relative to the central plate to form a box main body portion with an opening at the top, and the opening is closed by the top plate, The folding portion of the unfolded sheet is folded, the left side plate and the right side plate are placed on the inner surface of the center plate; The front connecting plate is overlapped and fixed to the inner surface of the outer plate of the front side plate, the rear connecting plate is overlapped and fixed to the inner surface of the outer plate of the rear plate; A packaging box characterized in that a primary assembly is formed in a state in which, when the top plate is connected to the left side plate, the top plate is overlapped on the outer surface side of the left side plate, and when the top plate is connected to the right side plate, the top plate is overlapped on the outer surface side of the right side plate, and / or when the inner plate is connected to the left side plate, the inner plate is overlapped on the outer surface side of the left side plate, and when the inner plate is connected to the right side plate, the inner plate is overlapped on the outer surface side of the right side plate.

12. a front side plate consisting of an inner plate and an outer plate at the front edge of a square central plate; a rear side plate consisting of an inner plate and an outer plate at the rear edge of the central plate; a left side plate on the left side of the central plate; a right side plate on the right side of the center plate; An inner plate is attached to either the left side of the left side plate or the right side of the right side plate, and a top plate is attached to the other side. a front connecting plate between the left side edge of the outer plate of the adjacent front side plate and the front side edge of the left side plate, and between the right side edge of the outer plate of the adjacent front side plate and the front side edge of the right side plate; a rear connecting plate between the left side edge of the outer plate of the adjacent rear plate and the rear side edge of the left side plate, and between the right side edge of the outer plate of the adjacent rear plate and the rear side edge of the right side plate; The folded portions of the unfolded sheets are connected together via the folded portions, and the folded portions are folded, the front connecting plate is sandwiched between the inner plate and the outer plate of the front plate; The rear connecting plate is sandwiched between the inner plate and the outer plate of the rear plate, A packaging box in which the front side plate, the rear side plate, the left side plate, and the right side plate are erected relative to the central plate to form a box main body portion with an opening at the top, and the opening is closed by the top plate, The folding portion of the unfolded sheet is folded, When the left side plate is connected to the inner side plate, the inner side plate is overlapped on the inner side of the left side plate, and the left side plate and the inner side plate are overlapped on the inner side of the center plate, When the inner plate is connected to the right side plate, the inner plate is overlapped on the inner side of the right side plate, and the right side plate and the inner plate are overlapped on the inner side of the center plate, The front connecting plate is overlapped and fixed to the inner surface of the outer plate of the front side plate, the rear connecting plate is overlapped and fixed to the inner surface of the outer plate of the rear plate; The packaging box is characterized in that the primary assembly is formed by overlapping the top plate on the outer surface side of the left side plate when the top plate is connected to the left side plate, and overlapping the top plate on the outer surface side of the right side plate when the top plate is connected to the right side plate.

13. 13. The packaging box according to claim 10, wherein a reinforcing plate is provided at an end edge of each of the front connecting plate and the rear connecting plate via a curved bent portion, and when the assembly of the packaging box is completed, the reinforcing plate comes into contact with the inner plate to restrict the swinging of the front plate and the rear plate.

14. 13. The packaging box according to claim 10, wherein the outer panel and inner panel of the front panel, and the inner panel and outer panel of the rear panel are stacked together to form a primary assembly.

15. 14. The packaging box according to claim 13, wherein a primary assembly is formed by stacking the outer and inner panels of the front panel and the inner and outer panels of the rear panel.

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