JP2011042376A - Packaging box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging box capable of simply forming corner part supports for reinforcement for reinforcing four corners of the box and easily holding the formed corner part supports without using joining means. <P>SOLUTION: The packaging box 10 is formed by applying a bending processing on a sheet of plate-like member 14 including a rectangular bottom plate 11 and peripheral wall plates 12 and 13 respectively continuously provided on four all side parts of this bottom plate 11. On first peripheral wall plates 12, folding flaps 15 each with a smaller width than that of the first peripheral wall plate 12 are continuously provided, and on side parts 15b of both sides of this folding flap 15, the corner part support forming flaps 16 are extended and continuously provided across the side parts 12b of the first peripheral wall plates 12. The peripheral wall plates 12 and 13 are bent and stood, and the folding flaps 15 are folded back inside and are overlapped and arranged on the first peripheral wall plates 12. Tip side parts 16a of the corner part support forming flaps 16 are extended and provided in the standing directions along the inner side faces of the second peripheral wall plates 13, to form the corner part supports 23 for reinforcing the four corners of the box. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a packaging box, and in particular, a packaging formed by bending a single plate-like member including a rectangular bottom plate and a peripheral wall plate connected to four sides of the bottom plate. Regarding the box.

  A packaging box such as a cardboard box is often used as a box for packing various items such as daily goods. These packaging boxes are cut and bent on sheet-like flat plate-like members such as corrugated cardboard plates, and, if necessary, by using bonding means such as an adhesive to form a box-shaped three-dimensional shape Assembled into.

  On the other hand, in daily miscellaneous goods such as detergents and shampoos, for example, a large number of products in the form of bag-like flexible packages such as pouches and gusset bags are manufactured and sold as refill products. In addition, as products such as foods and beverages, there are many products in which a bag-like flexible packaging body such as a retort food pouch, a pouch with a spout, or the like is the product.

  When packaging these soft packages directly in a packaging box such as a cardboard box, it is difficult to give strength to the products in the box, unlike when packaging hard containers such as bottle containers. is there. For this reason, the device which raises the intensity | strength of packaging boxes, such as a cardboard box, is needed.

  As a method for increasing the strength of the packaging box, it is conceivable to increase the strength of the constituent materials of the packaging box. The load on the machine also increases. On the other hand, the technique which provides the support | pillar part for reinforcement in four corners of a packaging box is proposed (for example, refer patent document 1 and patent document 2). In the technology for providing these reinforcing struts, a strut-forming flap is provided on both sides of the peripheral wall plate connected to the bottom plate, and this strut-forming flap is connected to a plurality of folding lines. By folding inward so as to have a triangular hollow cross section, hollow pillars having a triangular prism shape are formed at the four corners of the packaging box.

Japanese Patent Laid-Open No. 7-23630 JP 2005-15019 A

  However, in the technology of providing reinforcing column portions at the four corners of the conventional packaging box, the column portion is formed by folding the column-forming flaps inward to form a triangular prism shape via a plurality of folding lines. It takes a lot of work to do. In addition, since the support-forming-flap is about to return to its original flat shape, a bonding means such as an adhesive is used to hold the support-like support in the triangular prism shape against such restoring force. The work process becomes complicated because it is necessary.

  The present invention provides a packaging box that can easily form reinforcing corner struts that reinforce the four corners of the box and can easily hold the formed corner struts without using joining means. The purpose is to do.

  The present invention includes a single plate including a bottom plate having a rectangular shape (including a square) and four peripheral wall plates having a rectangular shape (including a square) continuously provided on four sides of the bottom plate. A packaging box formed by bending a member, wherein the four peripheral wall plates include a pair of first peripheral wall plates respectively connected to one opposing side portion of the bottom plate, and the other The first peripheral wall plate has a rectangular shape (including a square) having a width smaller than that of the first peripheral wall plate. Folding flaps are continuously provided, and corner strut-forming flaps are provided on both side portions of the folding flaps so as to extend beyond the side portions of the first peripheral wall plate. In the second peripheral wall plate, folding inner flaps are continuously provided on the side portions on both sides thereof, and the second peripheral wall plate is connected to the bottom plate. The four peripheral wall plates are bent and erected, and the folded flap is folded back inward so as to be overlapped with the first peripheral wall plate, and the tip side portion of the corner post forming flap is disposed on the first peripheral wall. Corner pillars that reinforce the four corners of the box are formed by extending in the standing direction along the inner surface of the second peripheral wall plate at a position away from the corners of the plate and the second peripheral wall plate. By providing a packaging box, the above object is achieved.

  According to the packaging box of the present invention, it is possible to easily form reinforcing corner support columns that reinforce the four corners of the box, and to easily hold the formed corner support columns without using joining means. it can.

It is a perspective view which shows the plate-shaped member which forms the packaging box which concerns on preferable 1st Embodiment of this invention in an unfolded state. (A)-(d) is a perspective view which illustrates the operation | work process which forms the packaging box which concerns on preferable 1st Embodiment of this invention from one plate-shaped member. It is a perspective view which shows the plate-shaped member which forms the packaging box which concerns on preferable 2nd Embodiment of this invention in an unfolded state. (A)-(e) is a perspective view which illustrates the operation | work process which forms the packaging box based on preferable 2nd Embodiment of this invention from one plate-shaped member. It is a fragmentary sectional view explaining the state which piled up the insertion flap, the folding inner flap, the folding flap, and the corner | angular part support | pillar formation flap on the 1st surrounding wall board. It is a fragmentary sectional view which illustrates other forms of a corner part pillar formation flap and a corner part pillar. It is a fragmentary sectional view which illustrates other forms of a corner part support flap and a corner part support. (A)-(d) is a perspective view which illustrates the other work process which forms the packaging box which concerns on preferable 2nd Embodiment of this invention from one plate-shaped member. (A), (b) is a perspective view explaining the condition which forms a packaging box using the insertion flap of another form.

  A packaging box 10 according to a first preferred embodiment of the present invention shown in FIGS. 1 and 2 is a bag-like flexible packaging body such as a pouch or a gusset bag, for example. It is formed as a box for packing. In addition, the packaging box 10 of the first embodiment is formed by simply and easily forming corner support columns that reinforce so that they are not easily crushed even when the contents are packed and stacked one above the other. It has a function to hold a solid shape in a stable state.

  And the packaging box 10 of this 1st Embodiment contains the rectangular-shaped bottom board 11, and the rectangular-shaped peripheral wall boards 12 and 13 each provided in four sides of this bottom board 11, respectively. 1 is a packaging box formed by bending a single plate-like member 14 as shown in FIG. 1, and the four peripheral wall plates 12, 13 are one opposite side of the bottom plate 11. It consists of a pair of 1st surrounding wall board 12 each provided in a row by a part, and a pair of 2nd surrounding wall board 13 each provided in a row by the other opposing side part. The first peripheral wall plate 12 has a rectangular folded flap 15 having a width smaller than that of the first peripheral wall plate 12 connected to the front end side portion thereof, and side portions 15b on both sides of the folded flap 15. The corner column support flaps 16 are provided so as to extend beyond the side portion 12 b of the first peripheral wall plate 12. Folded inner flaps 17 are connected to the side wall 13b on both sides of the second peripheral wall plate 13, respectively. As shown in FIGS. 2A to 2D, the peripheral wall plates 12, 13 are bent and erected with respect to the bottom plate 11, and the folding flap 15 is folded back to overlap the first peripheral wall plate 12. And the distal end side portion 16a of the corner post forming flap 16 is located along the inner surface of the second peripheral wall plate 13 at a position away from the corner portion 19 between the first peripheral wall plate 12 and the second peripheral wall plate 13. By extending in the standing direction (see FIG. 2D), corner support pillars 23 for reinforcing the four corners of the box are formed.

  In the first embodiment, the plate-like member 14 constituting the packaging box 10 is made of, for example, a sheet-like flat cardboard board as shown in FIG. 1 and has a predetermined planar shape to be described later. Cut. The plate-like member 14 is provided with a vertically long rectangular bottom plate 11 at the center portion, and a pair of first peripheral wall plates 12 and a pair of sides of the bottom plate 11 via bending lines 18a and 18b. Each of the second peripheral wall plates 13 is arranged continuously.

  The first peripheral wall plate 12 is continuously arranged along the pair of opposing short side portions of the bottom plate 11 with the same width as the short side portion. A folding flap 15 is continuously arranged on the front end side portion of the first peripheral wall plate 12 via a folding line 18c.

  As shown in FIG. 1, the folded flap 15 has a rectangular shape having a width b 1 narrower than the first peripheral wall plate 12 and a height h 1 substantially the same as the height of the first peripheral wall plate 12. The folded flap 15 is provided so as to protrude outward from the central portion of the front end side portion 12 a of the first peripheral wall plate 12. As a result, the side portions 15b on both sides of the folded flap 15 are arranged at the same distance from the side portions 12b on both sides of the first peripheral wall plate 12, respectively. Moreover, the corner | angular part support | pillar formation flap 16 is each arranged in a row by the side line part 15b of the both sides of the folding flap 15 via the bending line 18d. Further, an insertion tab 20 is provided at the center portion of the front end side portion 15a of the folding flap 15 so as to protrude outward. The insertion tab 20 is inserted into a slit hole 21 formed at a position close to the first peripheral wall plate 12 of the bottom plate 11 when the plate member 14 is bent to form the packaging box 10 as will be described later. It is inserted and locked (see FIG. 2D).

  In this first embodiment, the corner column forming flap 16 has a rectangular shape having substantially the same height as the height of the first peripheral wall plate 12 and the folding flap 15. Further, the corner column support flap 16 has a width b2 such that the tip end side portion 16a opposite to the side that is connected to the folding flap 15 extends beyond the side portion 12b of the first peripheral wall plate 12. Thus, the folding flap 15 is provided so as to protrude laterally from the side portion 15b. An incision slit 22 a is formed in a portion between the corner column support flap 16 and the first peripheral wall plate 12.

  The second peripheral wall plate 13 is continuously arranged along the pair of opposing long side portions of the bottom plate 11 with the same width as the long side portion and substantially the same height as the first peripheral wall plate 12. The Folded inner flaps 17 are connected to the side portions 13b on both sides of the second peripheral wall plate 13 via folding lines 18e.

  In the first embodiment, the folding inner flap 17 has a height substantially the same as the height of the first peripheral wall plate 12 and the second peripheral wall plate 13, preferably the height of the first peripheral wall plate 12 and the second peripheral wall plate 13. A rectangular shape having a height lower than the thickness of the plate-like member 14 is provided. When the folding flap 15 is folded back as will be described later, the folding inner flap 17 is set to a height lower than the height of the first peripheral wall plate 12 and the second peripheral wall plate 13 by the thickness of the plate member 14. Jumping out of the line 18c in the height direction can be suppressed, and the height of the first peripheral wall plate 12 can be substantially the same as that of the second peripheral wall plate 13 (see FIG. 2D). Further, the folded inner flap 17 is provided so as to protrude laterally from the side portion 13b of the second peripheral wall plate 13 with a width b3 that does not exceed half the width of the first peripheral wall plate 12. A notch slit 22 b is formed in a portion between the folded inner flap 17 and the first peripheral wall plate 12.

  In order to form the packaging box 10 using the plate-like member 14 having the above-described configuration, preferably, as shown in FIGS. 2 (a) to 2 (d), the first peripheral wall plate 12 is first inserted through the fold line 18a. And bent upright to stand vertically with respect to the bottom plate 11 (see FIG. 2A). Further, the folding inner flap 17 is bent vertically inward with respect to the second peripheral wall plate 13 via the folding line 18e (see FIG. 2B), and the second peripheral wall plate 13 is bent via the folding line 18b. It bends and stands upright with respect to the baseplate 11 (refer FIG.2 (c)). As a result, the folded inner flaps 17 are arranged so as to overlap each other inside the first peripheral wall plate 12.

  After that, the corner post forming flap 16 is folded outward with respect to the folded flap 15 via the folding line 18d so that the folded flap 15 can be inserted between the second peripheral wall plates 13 on both sides. . In this state, the folded flap 15 is folded back to the inside of the first peripheral wall plate 12 via the folding line 18 c, and the folded folded flap 15 is stacked on the inner side of the first peripheral wall plate 12 and the folded inner flap 17. (See FIG. 2D). Thereby, the corner | angular part support | pillar formation flap 16 is arrange | positioned between the 2nd surrounding wall boards 13 of both sides in the state bent by the inner side with respect to the folding flap 15. FIG. Further, the front end side portion 16 a of the corner column forming flap 16 is erected along the inner side surface of the second peripheral wall plate 13 at a position away from the corner portion 19 between the first peripheral wall plate 12 and the second peripheral wall plate 13. It is extended and arranged.

  Moreover, since the corner | angular part support | pillar formation flap 16 is arrange | positioned between the 2nd surrounding wall boards 13 of the both sides in the state folded by the inner side with respect to the folding flap 15, it follows the folding flap 15 from the folded state. Due to the restoring force to return to the original shape, a biasing force is generated in the corner strut forming flap 16 in a direction in which the tip side portion 16a is brought closer to the inner surface of the second peripheral wall plate 13. In the first embodiment, the urging force extends the tip side portion 16a of the corner post forming flap 16 in the standing direction in a state of being in contact with the inner side surface of the second peripheral wall plate. As a result, corner struts of a right-angled triangular cross section are formed at the four corners of the packaging box 10 with corner struts forming flaps 16 as oblique sides and corners 19 of the first peripheral wall plate 12 and the second peripheral wall plate 13. 23 is formed.

  And according to the packaging box 10 of this 1st Embodiment which has the above-mentioned structure, while being able to form easily the corner | angular support | pillar for reinforcement which reinforces four corners of a box, the formed corner | angular part support | pillar Can be easily held without using a joining means.

  That is, according to the first embodiment, the folded flap 15 having a small width is connected to the front end side portion 12a of the first peripheral wall plate 12, and the side portions 15b on both sides of the folded flap 15 are provided with corners. Since the support column forming flap 16 is provided so as to extend beyond the side portion 12b of the first peripheral wall plate 12, the corner support column forming flap 16 is folded outward with respect to the folding flap 15, By simply folding the folded flap 15 inside the first peripheral wall plate 12, it becomes possible to easily form the corner pillars 23 that reinforce the four corners of the box. Further, the corner post forming flaps 16 disposed between the second peripheral wall plates 13 on both sides in a state of being folded inward with respect to the folding flaps 15, try to return to the original shape along the folding flaps 15. Since the urging force in the direction in which the distal end side portion 16a is brought closer to the inner side surface of the second peripheral wall plate 13 is generated by the restoring force to be generated, the corner pillars 23 formed without using the joining means by using this urging force. Can be easily held.

  Furthermore, since the packaging box 10 of the first embodiment is formed from a single plate-like member 14, the amount of material used can be kept small, and the preparation of the material is facilitated. Further, since it can be formed only by bending without using a bonding means such as an adhesive, it is possible to reduce the work load of the assembling work and to facilitate automation.

  Furthermore, the packaging box 10 of the first embodiment can be easily disassembled. Moreover, since it is assembled only by bending without using bonding means such as an adhesive, the plate-like member 14 can be disassembled without being damaged. This makes it possible to easily reuse (reuse) the plate-like member 14 after disassembly. Moreover, since it can be easily developed into a flat shape after dismantling, the packaging box 10 is not bulky, and is returned from the store or the like to a factory or a bagging work place where the packaging box 10 is packed again with a flexible packaging body or the like. It has excellent returnability.

  As described above, the packaging box 10 of the first embodiment in which the four corners of the box are reinforced by the corner pillars 23 has a large vertical strength and cannot be given strength as a package. Even when a plurality of steps are stacked in the vertical direction, the package shape can be firmly held without being crushed. In addition, the packaging box 10 of the first embodiment is formed in a shape with the upper end being an upper end opening surface, and the general consumer can take out the contents from the upper end opening surface. For example, display work can be reduced by displaying the contents in a store, for example.

  3 and 4 (a) to 4 (e) illustrate a packaging box 30 according to a second preferred embodiment of the present invention. In the packaging box 30 of the second embodiment, in addition to the same configuration as the packaging box 10 of the first embodiment, the second peripheral wall plate 13 has a side top surface portion forming flap 31 on the front end side portion 13a. Each is connected. Further, insertion flaps 32 are connected to the side portions on both sides of these side top surface forming flaps 31, respectively. As shown in FIGS. 4A to 4E, the side top surface portion forming flap 31 is bent inward along the upper end opening surface at both sides of the upper end opening surface, and the insertion flap 32 is the second peripheral wall plate. 13 is inserted between the folded inner flap 17 and the first peripheral wall plate 12. In this state, both end portions of the side top surface forming flap 31 can be supported from below. In other words, the insertion flaps 32 on the side portions on both sides of the side top surface forming flap 31 can be supported by the friction between the folded inner flap 17 and the first peripheral wall plate 12 that are connected to the second peripheral wall plate 13. It has become. Moreover, the insertion flap 32 is also supported by the influence of the friction of the both ends of the bending line 18c.

  In this 2nd Embodiment, the plate-shaped member 33 which comprises the packaging box 30 is flat like a sheet | seat like the plate-shaped member 14 of the packaging box 10 of the said 1st Embodiment, as shown in FIG. It consists of a single cardboard board. Moreover, the plate-shaped member 33 arrange | positions the side part top | upper surface part formation flap 31 by which the insertion flap 32 was provided in the both sides by the front end side part 13a of the 2nd surrounding wall board 13 in the plate-shaped member 14 of the said 1st Embodiment. Cut into shapes.

  That is, in this 2nd Embodiment, the side part top surface part formation flap 31 is respectively the same length as the width | variety b4 of the 2nd surrounding wall board 13, and about 10%-40% of the width | variety b5 of the short side direction of a baseplate. The width of the second peripheral wall plate 13 extends outward from the tip side portion 13a of the second peripheral wall plate 13 via a fold line 34a. In addition, insertion flaps 32 are arranged in a row on the side portions on both sides of the side top surface forming flap 31 via a fold line 34b. The insertion flap 32 has the same width as that of the side top surface forming flap 31 and has the same length as the width b3 of the folded inner flap 17 connected to the side portion 13b of the second peripheral wall plate 13. The top surface forming flap 31 is provided so as to protrude laterally from the side portion. A cut slit 35 a is formed in a portion between the insertion flap 32 and the folded flap 17.

  In order to form the packaging box 30 using the plate-like member 33 having the above-described configuration, first, as shown in FIGS. 4A to 4E, first, the second peripheral wall plate 13 is first interposed via the fold line 18b. And bent upright to stand vertically to the bottom plate 11 (see FIG. 4A). Further, the folding inner flap 17 is bent vertically inward with respect to the second peripheral wall plate 13 via the folding line 18e (see FIG. 4B), and the insertion flap 32 is bent to the side portion via the folding line 34b. The side top surface portion forming flap 31 is bent inward with respect to the second peripheral wall plate 13 via a fold line 34a in a state where the top surface portion forming flap 31 is bent vertically inward. Thereby, the insertion flap 32 is disposed along the outer surface of the folded inner flap 17 (see FIG. 4C).

  Further, the first peripheral wall plate 12 is bent through a fold line 18a, and the first peripheral wall is erected vertically with respect to the bottom plate 11 with the insertion flap 32 being sandwiched between the outer surface of the inner flap 17 and the inner wall. The plate 12 is disposed outside the folded inner flap 17 (see FIG. 2D). In this state, the width b1 of the folded flap 15 provided continuously to the first peripheral wall plate 12 is equal to or slightly equal to the distance b between the side top surface portion forming flaps 31 on both sides disposed along the upper end opening surface. It is getting smaller.

  Thereafter, the corner strut forming flap 16 is substantially perpendicular to the folded flap 15 via the folding line 18d so that the folded flap 15 can be inserted between the side top surface forming flaps 31 on both sides. Bend it. In this state, the folding flap 15 is folded back to the inside of the first peripheral wall plate 12 via the folding line 18c while passing between the side top surface portion forming flaps 31 on both sides. In addition, the folded flap 15 that is folded is placed on the inside of the first peripheral wall plate 12 and the inner flap 17 so as to be erected (see FIG. 2E). Thereby, the corner | angular part support | pillar formation flap 16 is arrange | positioned between the 2nd surrounding wall boards 13 of both sides in the state bent by the inner side with respect to the folding flap 15. FIG. Further, the front end side portion 16 a of the corner column forming flap 16 is erected along the inner side surface of the second peripheral wall plate 13 at a position away from the corner portion 19 between the first peripheral wall plate 12 and the second peripheral wall plate 13. It is extended and arranged.

  Further, in the second embodiment, the corner support column forming flaps 16 are the second peripheral walls on both sides in a state of being folded inward with respect to the folding flaps 15 below both end portions of the side top surface forming flaps 31. Since it is arrange | positioned between the board | plates 13, the front-end | tip side edge part 16a is made into 2nd in the corner | angular support | pillar formation flap 16 with the restoring force which tries to return to the original shape along the folding flap 15 from the folded state. A biasing force is generated in a direction approaching the inner surface of the peripheral wall plate 13. By this urging force, the tip side portion 16a of the corner portion column forming flap 16 extends in the standing direction in a state where it contacts the inner side surface of the second peripheral wall plate. As a result, at the four corners of the packaging box 30, corner struts having a right-angled triangular cross section together with corner portions 19 of the first peripheral wall plate 12 and the second peripheral wall plate 13, with the corner strut forming flaps 16 as the oblique sides. 23 is formed.

  And also by the packaging box 30 of this 2nd Embodiment, the effect similar to the packaging box 10 of the said 1st Embodiment is show | played by the function of the corner | angular part support | pillar 23 formed in four corners. In addition, according to the packaging box 30 of the second embodiment, the side top surface portion forming flaps 31 are provided along the both side portions of the upper end opening surface, so that the packaging box 30 is stacked up and down. The stability is improved, and the strength of the side top surface forming flap 31 in the longitudinal direction, that is, the long side direction of the bottom plate 11 is also improved.

  Furthermore, according to the packaging box 30 of the second embodiment, as shown in FIG. 5, the first peripheral wall plate 12, the insertion flap 32, the folded inner flap 17, and the folded flap are formed at both ends in the longitudinal direction. 15 and the corner support | pillar formation flap 16 are piled up, and even if it does not use the joining means by an adhesive etc. by the frictional force between these, the assembled box-shaped shape is hold | maintained in the more stable state. It becomes possible. For example, the insertion flap 32 and the folded inner flap 17 are sandwiched between the first peripheral wall plate 12 and the folded flap 15 and the corner post forming flap 16 so that the inserted flap 32 and the folded inner flap 17 can be effectively used. It becomes possible to suppress. Moreover, the state which has arrange | positioned the side part top surface part formation flap 31 along the upper end opening surface is effectively hold | maintained by inserting and inserting the insertion flap 32 between the 1st surrounding wall board 12 and the folding inner flap 17. FIG. It becomes possible to do.

  FIGS. 6A to 6C illustrate other forms of the corner post supporting flaps 16 ′ and the corner post 23 ′. The corner support | pillar formation flap 16 'shown to Fig.6 (a)-(c) is bent through the some bending line 40 extended in the standing direction, and corner support | pillar 23' is 1st. A polygonal hollow cross-sectional shape of a triangle or more is provided together with corner portions 19 of the first peripheral wall plate 12 and the second peripheral wall plate 13. 6A to 6C, the corner strut formation flap 16 ′ and the corner strut 23 of the first embodiment and the second embodiment are also used. Similarly to the above, the four corners of the packaging box 10 and the packaging box 30 can be effectively reinforced.

  FIGS. 7A to 7D illustrate still other forms of the corner post forming flaps 16 ″ and the corner post 23 ″. 7 (a) to 7 (d), the corner post forming flap 16 ″ has a tip side portion 16a ″ at a position away from the corner 19 between the first peripheral wall plate 12 and the second peripheral wall plate 13. By extending in the standing direction in a state of being separated from the inner side surface of the second peripheral wall plate 13, a plate-wall-shaped corner column post 23 ″ is formed by the corner column column-forming flap 16 ″. 7A to 7D, the corner strut formation flap 16 and the corner strut 23 of the first embodiment and the second embodiment are also used. Similarly to the above, the four corners of the packaging box 10 and the packaging box 30 can be effectively reinforced.

  The present invention is not limited to the above-described embodiments, and various modifications can be made. For example, the bottom plate does not necessarily have a vertically long rectangular shape, and may be a square. In addition, a pair of first peripheral wall plates 12 connected to one opposing side portion and a pair of second peripheral wall plates 13 connected to the other opposing side portion with respect to the rectangular bottom plate 11 respectively. The relationship may be reversed. That is, the 1st surrounding wall board provided with a folding flap and a corner | angular part support | pillar formation flap can also be provided in a row by the long side part of a rectangular-shaped bottom board. Further, the plate-like member constituting the packaging box does not necessarily need to be a cardboard board, but a paperboard, a plastic cardboard, a cardboard board with a resin film pasted on the surface, a resin board, a metal board, a rubber board, or a combination thereof. Various plate-like members in the form of a flat sheet that can be bent can be used. Furthermore, a window-shaped notch for allowing the contents to be seen can be provided in the second peripheral wall plate not provided with the folded flap. In addition, the accommodated item is not necessarily a bag-like flexible package such as a pouch or gusset bag, and may be a hard container such as a bottle container. Furthermore, the packaging box can be reinforced using an adhesive such as hot melt, an adhesive tape, or the like as necessary. In order to enhance the appearance at the store, the first peripheral wall plate and the second peripheral wall plate may be decorated.

  The packaging box 30 of the said 2nd Embodiment can also be assembled from the plate-shaped member 33 in the procedure different from the procedure shown to Fig.4 (a)-(e). That is, for example, as shown in FIGS. 8A to 8D, the first peripheral wall plate 12 is bent through a fold line 18a and is erected vertically with respect to the bottom plate 11 (see FIG. 8A). ). Further, the folding inner flap 17 is bent vertically inward with respect to the second peripheral wall plate 13 via the folding line 18e, and the insertion flap 32 is outside with respect to the side top surface portion forming flap 31 via the folding line 34b. The second peripheral wall plate 13 is bent through a fold line 18b in a state of being bent in the vertical direction, and is erected vertically with respect to the bottom plate 11 (see FIG. 8B). Accordingly, the folded inner flaps 17 are arranged so as to overlap each other inside the first peripheral wall plate 12.

  Next, in a state where the corner column support flap 16 is folded outward with respect to the folding flap 15 via the folding line 18d, the folding flap 15 is attached to the first peripheral wall plate 12 via the folding line 18c. Folded inward and placed upside down on the inside of the first peripheral wall plate 12 and the folded flap 17 (see FIG. 8C). Thereby, the corner | angular part support | pillar formation flap 16 is arrange | positioned between the 2nd surrounding wall boards 13 of both sides in the state bent by the inner side with respect to the folding flap 15. FIG. Further, the front end side portion 16 a of the corner column forming flap 16 is erected along the inner side surface of the second peripheral wall plate 13 at a position away from the corner portion 19 between the first peripheral wall plate 12 and the second peripheral wall plate 13. It is extended and arranged.

  Thereafter, for example, in a state where the first peripheral wall plate 12 is pulled outward using a vacuum pad or the like, the insertion flap 32 is folded back with respect to the side top surface portion forming flap 31 and the side top surface portion forming flap 31 is The insertion flap 32 is pushed between the first circumferential wall plate 12 and the folded inner flap 17 by bending inward with respect to the second circumferential wall plate 13 via the folding line 34a (see FIG. 8C). ), The side top surface portion forming flap 31 is disposed along the upper end opening surface. Thereby, the packaging box 30 of the said 2nd Embodiment is formed (refer FIG.4 (d)).

  In addition, it is preferable to adjust the length of the insertion flap 32 to be appropriately short so that the operation of pushing the insertion flap 32 between the first peripheral wall plate 12 and the folded inner flap 17 can be performed smoothly. Further, as shown in FIGS. 9A and 9B, the insertion flap 32 ′ is formed, for example, in a substantially quarter-circular shape, so that the insertion flap 32 ′ is inserted between the first peripheral wall plate 12 and the folded inner flap 17. The operation of inserting the flap 32 ′ to form the packaging box 30 can be performed more easily.

DESCRIPTION OF SYMBOLS 10,30 Packaging box 11 Bottom plate 12 1st surrounding wall board 13 2nd surrounding wall board 14,33 Plate-shaped member 15 Folding flap 16,16 ', 16 "Corner | angular support | pillar formation flap 16a, 16a" The front-end | tip of a corner | angular part support | pillar formation flap Side portion 17 Folding inner flaps 18a, 18b, 18c, 18d, 18e Folding line 19 Corner portion 20 between first peripheral wall plate and second peripheral wall plate Insert tab 21 Slit holes 22a, 22b Cut slits 23, 23 ', 23 ”Corner column 31 Side top surface forming flaps 32, 32 ′ Insertion flaps 34a, 34b Folding line 35a Cutting slit 40 Folding line

Claims (6)

A packaging box formed by bending a single plate-like member including a rectangular bottom plate and four rectangular peripheral wall plates connected to four sides of the bottom plate, respectively. There,
The four peripheral wall plates include a pair of first peripheral wall plates connected to one opposite side portion of the bottom plate, and a pair of second peripheral wall plates connected to the other opposite side portion, respectively. Consists of
The first peripheral wall plate is continuously provided with a folded flap having a rectangular shape smaller than the first peripheral wall plate at a tip side portion thereof, and corners on both sides of the folded flap are provided with corners. The part strut forming flap extends beyond the side part of the first peripheral wall plate and is continuously provided.
Folding inner flaps are continuously provided on the side portions on both sides of the second peripheral wall plate,
The four peripheral wall plates are bent and erected with respect to the bottom plate, the folded flap is folded back inward and arranged on the first peripheral wall plate, and the side edge portion on the front end of the corner column forming flap Corners that reinforce the four corners of the box by extending in the standing direction along the inner surface of the second peripheral wall plate at a position away from the corners of the first peripheral wall plate and the second peripheral wall plate A packaging box in which the support column is formed.   The corner side column forming flap is extended in the standing direction in a state in which the side end portion of the corner column forming flap is in contact with the inner side surface of the second peripheral wall plate. 2. The packaging box according to claim 1, wherein corner struts having a right-angled triangular cross section are formed together with corners of the plate and the second peripheral wall plate.   The corner-side strut-forming flap is extended in the standing direction in a state of being separated from the inner side surface of the second peripheral wall plate by the tip side portion of the corner-strut-forming flap. The packaging box of Claim 1 in which is formed.   The corner strut formation flap forms a corner strut in a state having one or two or more bent corners by being bent through a bent line extending in a standing direction. The packaging box in any one of 1-3.   The second peripheral wall plate is continuously provided with side top surface portion forming flaps at the front end side portions thereof, and insertion flaps are continuously provided at side portions on both sides of the side top surface portion forming flaps. The side top surface portion forming flap is bent inward along the upper end opening surface, and the insertion flap is connected between the second peripheral wall plate and the inner folding flap and the first peripheral wall plate. 5. The packaging box according to claim 1, wherein both side portions of the side top surface forming flap can be supported from below in the inserted state.   An insertion tab is provided at a front end side portion of the folded flap continuously provided on the first peripheral wall plate, and the insertion tab is formed in a slit hole formed at a position close to the first peripheral wall plate of the bottom plate. The packaging box in any one of Claims 1-5 inserted.

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