JP5504386B1 - Packaging box sheet and packaging box - Google Patents

Abstract

The present invention provides a packaging box having a flat inner surface and excellent bar stacking stability and aesthetics, and a packaging box sheet capable of forming such a packaging box.
A packaging box sheet according to the present invention includes a pair of opposed side panels, a pair of end face panels interposed between side edges of the pair of side panels, and upper edges of the pair of side panels. A pair of lid flaps that are respectively extended from the upper edges of the pair of side panels in the assembled state, and a pair of bottom flaps that are respectively extended from the lower edges of the pair of side panels and that have the lower edges butted together in the assembled state. A pair of upper flaps that are respectively extended from the center of the upper edge of the pair of end face panels and bent to the upper side of the lid flap in the assembled state; The lower flap has a notch having a shape substantially equal to the upper flap at a position corresponding to the upper flap.
[Selection] Figure 1

Description

  The present invention relates to a packaging box sheet and a packaging box.

  It consists of a corrugated cardboard sheet and extends from the upper and lower edges of the end face of the square tubular part formed by a pair of side faces (length face) and a pair of end faces (width face). Short side flaps (inner flaps) that can be folded inward, and long side flaps (outer flaps) that extend from the upper and lower edges of the side surface, are folded outside the short side flaps, and the leading edges meet each other ) Are widely used.

  In a retail store or the like, a plurality of packaging boxes for wrapping products may be stacked one above the other in order to display products (so-called bar stacking). In this case, if the packaging boxes are slippery, the packaging box may collapse due to a slight impact. Therefore, in the packaging box in which the long side flap is folded on the outer side of the short side flap, an engagement piece is formed by cutting off a part continuous to the end face of the upper side (top side) of the short side flap. Is folded over the long side flap, and the packaging box is stacked up and down by forming a notch into which the engagement piece fits at the side edge of the lower (bottom side) long side flap. There is known a technique for preventing the damage from easily breaking (see Japanese Utility Model Laid-Open Nos. 55-110421 and 2011-143966).

  Further, in general, the conventional packaging box has a chamfering efficiency from the raw material sheet, so that the extended lengths of the short side flap and the long side flap are equal, and the leading edge of the short side flap cannot be abutted. For this reason, the conventional packaging box is sealed by folding the long side flap on the outside of the short side flap, thereby forming a step due to the leading edge of the short side flap inside the packaging box. In a packaging box that accommodates easily damaged products such as pouch-packaged products, the product may be damaged by such a step. There is a method of inserting a sheet between the leading edges of the short side flaps, but the cost increases due to an increase in materials. In addition, when the product is easily deformed, it is difficult to hold the sheet between the leading edges of the short side flaps.

  Therefore, it is conceivable to flatten the inside of the packaging box by folding the long side flap first and folding the short side flap outside the long side flap. However, when the above-described bar stacking stabilization technique using the engaging pieces is applied to a packaging box in which the short side flaps are folded on the outside of the long side flaps, the engaging pieces are extended from the side surface. In general, when packing boxes are stacked for display of merchandise at a storefront, the side faces are front, and therefore the appearance is not good when the engagement pieces are arranged on the side faces.

Japanese Utility Model Publication No. 55-110421 JP 2011-143966 A

  In view of the above inconveniences, an object of the present invention is to provide a packaging box having a flat inner surface and excellent bar stacking stability and aesthetics, and a packaging box sheet capable of forming such a packaging box.

  The invention made in order to solve the above-mentioned problem is a sheet for a packaging box, which is composed of a single sheet and can be assembled into a box shape, between a pair of opposing side panels and the side edges of the pair of side panels. A pair of end face panels, a pair of lid flaps extending from the upper edges of the pair of side panels, and the upper edges abutting each other in the assembled state, and under the pair of side panels A pair of bottom flaps that extend from the edges and have their lower edges abutted with each other in the assembled state, and extend from the center of the upper edge of the pair of end face panels, and are folded to the upper side of the lid flap in the assembled state A pair of upper flaps and a pair of lower flaps that extend from the lower edges of the pair of face panels and are bent to the lower side of the bottom flap in an assembled state, Lower flap is, at a position corresponding to the upper flap, and having a notch of substantially equal shape as the outer shape of the upper flap.

  Since the packaging box sheet has a pair of lid flaps and a pair of bottom flaps that are brought together in the assembled state, the inner surface is flat in the assembled state. Further, the packaging box sheet has an upper flap extending from the center of the upper edge of the end face panel, a lower flap having a notch corresponding to the upper flap, and the upper flap being fitted to the lower flap. Excellent stacking stability. Further, the packaging box sheet has a notch that the lower flap opens to the base end edge side, and has no fitting structure on the side panel side that is the front face at the time of display.

  It is preferable that the upper flap has a width at the tip edge larger than a width at the base edge. In the packaging box sheet, the length of the base edge of the upper flap (connection length with the end face flap) and the length excluding the notched portion of the base end edge of the lower flap (connection length with the end face flap) Are complementary to each other when one is increased. Therefore, as described above, the width of the base end edge of the upper flap is smaller than the width of the front end edge, so that the adhesive width between the lid flap and the upper flap is increased and sufficient connection between the lower flap and the end face flap is achieved. The length can be secured.

  A connection panel may be provided between the side panel and the end face panel. In this way, the packaging box sheet that has a connection panel and forms a substantially octagonal box in a plan view in which the corners of the side panel and the end face panel are chamfered reduces the required area of the sheet due to the chamfering. Therefore, the cost can be reduced.

  The lower flap may have an easy-to-bend line positioned below the lower edge of the end face panel. Thus, by offsetting the folding position of the lower flap with respect to the end face panel downward from the end face panel, the notch is opened to the base edge side of the lower flap, and the engagement with the upper flap can be ensured.

  Formed between the side panel and the lid flap or the bottom flap so as to form a protrusion protruding from the upper edge or lower edge of the side panel in the assembled state, and both ends are bent toward the side panel. It is good to have a notch. As the ridge is formed in the box body assembled with the packaging box sheet in this way, the box body assembled with the packaging box sheet abuts against the floor and other box bodies also with the ridge portion. Stability and a sense of unity when stacking are improved.

  The lid flap has an upper convex portion that can be brought into contact with the upper edge of the pair of face panels in the assembled state, and the bottom flap is a lower edge of the pair of face panel in the assembled state. It is good to have the lower convex part which can contact | abut to a center part. Thus, since the lid flap and the bottom flap are in contact with the upper edge and the lower edge of the face panel, folding is prevented inside the box body in which the packaging box sheet is assembled. And the top surface can be reliably sealed.

  Another invention made in order to solve the above-described problem is that the packaging box sheet is assembled, the upper flap is attached to the upper side of the lid flap, and the lower flap is attached to the lower side of the bottom flap. It is a packaging box worn.

  In this packaging box, the lid flap and the bottom flap form a flat inner surface, and the upper flap fits into the notch of the lower flap, so it has excellent bar stacking stability and fits on the side panel that is the front when displaying. Since it does not have a composite structure, it is excellent in aesthetics.

  As described above, the packaging box formed by assembling the packaging box sheet of the present invention has a flat inner surface and is excellent in bar stacking stability and aesthetics.

It is a typical top view which shows the sheet | seat for packaging boxes of one Embodiment of this invention. It is a typical upper surface side perspective view of the packaging box which assembled the sheet | seat for packaging boxes of FIG. It is a typical back side perspective view of the packaging box of FIG. It is a typical perspective view which shows the bar stacking state of the packaging box of FIG. It is a typical perspective view of the packaging box of embodiment different from FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

[First embodiment]
The packaging box sheet in FIG. 1 is composed of a single cardboard sheet and can be assembled into a box shape as shown in FIG. In FIG. 1, a thick solid line indicates an edge obtained by cutting a corrugated cardboard sheet, and a thin solid line indicates an easy folding line (ruled line) formed by embossing the corrugated cardboard sheet.

  The packaging box sheet includes a pair of side panels 1 facing each other in an assembled state, a pair of end face panels 2 interposed between the side edges of the pair of side face panels 1, and the side panel 1 and the end face panel. 2 and a bonding panel that is bonded to each other in an assembled state to form a single panel that connects the side panel 1 at one end of the sheet and the end panel 2 at the other end of the sheet. 4 and a pair of lid flaps 5 extending from the upper edges of the pair of side panels 1 and the upper edges abutting each other in the assembled state, and extending from the lower edges of the pair of side panels 1 and assembled. A pair of bottom flaps 6 whose lower edges are butted against each other and a pair of upper flaps that extend from the center of the upper edge of the pair of face panels 2 and are bent to the upper side of the lid flap 5 in the assembled state. A flop 7, respectively extend from the pair of lower edge wife face panel 2, and a pair of lower flap 8 which is folded below the bottom flaps 6 in the assembled state.

  The side panel 1, the face panel 2, the connection panel 3, and the sticking panel 4 form an octagonal cylindrical portion in plan view in the assembled state. As shown in FIG. 2, the upper end opening of the cylindrical portion is sealed by a pair of lid flaps 5. The lid flap 5 is held in a sealed state by attaching an upper flap 7 to the upper side surface thereof. As shown in FIG. 3, the lower end opening of the cylindrical portion is sealed with a pair of bottom flaps 6. The bottom flap 6 is held in a sealed state by attaching the lower flap 8 to the lower side surface thereof.

  The upper flap 7 extends from a central portion excluding both ends of the upper edge of the end face panel 2 and is formed in a substantially trapezoidal shape in which the width of the tip edge is larger than the width of the base edge.

  The extension length from the base end edge (the bottom edge of the end face panel 2) of the lower flap 8 is equal to the extension length from the base end edge (the bottom edge of the side panel 1) of the bottom flap 6. The lower flap 8 has a notch 9 having a shape substantially equal to that of the upper flap 7 at a position corresponding to the upper flap 7 (vertical symmetrical position). Specifically, the notch 9 is formed to be slightly larger than the upper flap 7 so that the upper flap 7 can be easily fitted, and to open the center of the base edge of the lower flap 8. As a result, when the packaging boxes formed by assembling the packaging box sheets are stacked in a vertical row, as shown in FIG. The flap 7 is fitted.

  As a minimum of the width of the base end edge of upper flap 7 (connection length with end face panel 2), 1/3 of the base end edge of end face panel 2 is preferred, and 2/5 is more preferred. On the other hand, the upper limit of the width of the base edge of the upper flap 7 is preferably 2/3 of the base edge of the face panel 2 and more preferably 3/5. When the width of the base end edge of the upper flap 7 is less than the above lower limit, the gap between the upper flap 7 and the end face panel 2 may be easily broken. If the width of the base edge of the upper flap 7 exceeds the above upper limit, the effective width of the base edge of the lower flap 8 that is complementary to the width of the base edge of the upper flap 7 (excluding the notch 9 portion). Width) becomes smaller, and there is a possibility that the lower flap 8 and the end face panel 2 are likely to be broken. The width of the base end edge of the upper flap 7 is, for example, approximately ½ of the base end edge of the end face panel 2.

  As a minimum of extension length from the base edge of upper flap 7, 1/3 of extension length of lid flap 5 and bottom flap 6 is preferred, and 1/2 is more preferred. On the other hand, as an upper limit of the extension length from the base edge of the upper flap 7, 3/4 of the extension length of the lid flap 5 and the bottom flap 6 is preferable, and 2/3 is more preferable. If the extension length of the upper flap 7 from the base end edge is less than the lower limit, the lid flap 5 may not be sufficiently retained. Moreover, when the extension length from the base end edge of the upper flap 7 exceeds the said upper limit, the area | region of the front end side rather than the notch 9 of the lower flap 8 becomes small, and there exists a possibility that the bottom flap 6 cannot fully be hold | maintained.

  The lid flap 5 is an upper projection that protrudes to the side by the thickness of one sheet of corrugated cardboard so as to abut the portion where the upper flap 7 of the upper edge of the end face panel 2 is not extended in the assembled state. It has the part 10 and the upper side arc part 11 which protrudes in circular arc shape so that it may contact | abut to the upper edge of the connection panel 3 or the sticking panel 4 in an assembly state.

  The bottom flap 6 is a lower side projecting sideways by the thickness of one sheet of corrugated cardboard so as to abut the portion where the lower flap 8 of the lower edge of the end face panel 2 is not extended in the assembled state. It has the convex part 12 and the lower side arc part 13 which protrudes in circular arc shape so that it may contact | abut to the lower edge of the connection panel 3 or the sticking panel 4 in an assembly state.

  The contour of the side edge of the lower flap 8 is an inverted shape of the side edge of the bottom flap 6 having the lower convex portion 12.

  The packaging box sheet has a substantially vertically U-shaped cut 14 whose both ends are bent toward the side panel 1 between the side panel 1 and the lid flap 5. As shown in FIG. 2, when the packaging box sheet is assembled into a box shape, the notch 14 forms a protrusion 15 that protrudes upward from the upper edge of the side panel 1.

  The upper flap 7 has an upper flap folding easy line 16 formed from the upper edge of the end face panel 2 to the upper side of the end face panel 2 by the thickness of approximately one corrugated cardboard sheet. On the other hand, the lower flap 8 has a lower flap easy-to-bend line 17 formed below the lower edge of the end face panel 2 by the thickness of approximately one cardboard sheet.

<Assembly method>
The said packaging box sheet | seat is assembled by the method which has a cylindrical part formation process, a bottom formation process, an articles | goods accommodation process, and a lid | cover sealing process.

(Cylindrical part forming step)
In the tubular part forming step, the side panel 1, the end face panel 2, the connection panel 3 and the sticking of the packaging box sheet are formed around the octagonal columnar mold corresponding to the tubular part of the assembled packaging box. The panel 4 is wound and the sticking panels 4 at both ends are bonded together to form a cylindrical portion having an octagonal cross section.

(Bottom formation process)
In the bottom forming step, in a state where the packaging box sheet is wound around the mold, the pair of bottom flaps 6 are bent to seal the lower end opening of the tubular portion, and the lower flap is placed below the bottom flap 6. Fold 8 and stick. Thereby, the state which the lower side convex part 12 of the bottom flap 6 contact | abuts to the lower edge of the end face panel 2 is hold | maintained, and it becomes possible to maintain the octagonal cross-sectional shape of the said cylindrical part.

(Article containment process)
In the article housing step, the article is housed inside the tubular portion from the upper end opening of the tubular portion of the packaging box sheet removed from the mold.

(Lid sealing process)
In the lid sealing step, the upper end opening of the cylindrical portion is sealed with a pair of lid flaps 5, and the upper flap 7 is folded and stuck on the upper side of the lid flap 5. Thereby, the sealed packaging box is formed.

<Advantages>
The packaging box formed by assembling the packaging box sheet is a lid flap 5 whose upper edges are abutted with each other at the upper end opening of the cylindrical portion composed of the side panel 1, the end panel 2, the connection panel 3 and the sticking panel 4. And the lower end opening of the cylindrical part is sealed with a bottom flap 6 whose lower edges are abutted against each other. In this way, no step is formed on the inner surface of the packaging box formed by the pair of lid flaps 5 and the pair of bottom flaps 6 that are brought into contact with each other. For this reason, there is no possibility that the article accommodated in the packaging box will be damaged by the edge of the cardboard sheet.

  Moreover, since the upper flap 7 fits into the notch 9 of the lower flap 8, the packaging box is excellent in bar stacking stability. Furthermore, since the said packaging box is comprised by the upper flap 7 and the lower flap 8 which the above-mentioned fitting structure is extended from the upper edge and lower edge of the end face panel 2, when it sees from the side panel 1 side. Inconspicuous. For this reason, when the packaging box is stacked in such a manner that the side panel 1 faces the front in order to display the product, the fitting structure does not impair the aesthetic appearance.

  Further, since the upper flap 7 of the packaging box is formed in a substantially trapezoidal shape with the width of the tip edge larger than the width of the base edge, the notch 9 of the upper flap 7 of the packaging box stacked in a bar is opened. Deviation in the direction can also be prevented. Furthermore, the width of the base edge of the upper flap 7 is made larger than the width of the tip edge, so that the width of the base edge of the upper flap 7 (connection length between the upper flap 7 and the end face panel 2) is complementary. While securing the effective connection length between the lower flap 8 and the end face panel 2, the bonding width between the lower flap 8 and the bottom flap 6 can be increased.

  In addition, the packaging box includes a connection panel 3 between the side panel 1 and the face panel 2, and has a substantially octagonal cylindrical part in a plan view in which the corners of the side panel 1 and the face panel 2 are chamfered. Have As described above, since the circumferential length of the cylindrical portion is shortened by making the cylindrical portion into an octagon with a quadrangular chamfer in plan view, the packaging box sheet for forming the packaging box has a small area. Can be provided at low cost.

  In the packaging box sheet, the lid flap 5 has an upper convex portion 10 that comes into contact with the upper edge of the end face panel 2 and an upper arc portion 11 that comes into contact with the upper edge of the connection panel 3 or the sticking panel 4 in the assembled state. Therefore, it is not accidentally folded into the cylindrical part, and the upper end opening of the cylindrical part can be reliably sealed and the compressive strength of the packaging box can be increased. Similarly, the bottom flap 6 has a lower convex portion 12 that contacts the lower edge of the end face panel 2 and a lower arc portion 13 that contacts the lower edge of the connection panel 3 or the sticking panel 4 in the assembled state. The lower end opening of the cylindrical portion can be reliably sealed and the compressive strength of the packaging box can be increased.

  The lower flap 8 of the packaging box sheet is folded at the lower flap folding easy line 17 formed below the lower edge of the face panel 2 in the assembled state, so that the lower flap 8 is lowered to the center of the lower edge of the end face panel 2. The bottom flap 6 that is bent so that the side convex portion 12 abuts can be easily attached to the lower surface of the bottom flap 6 without applying excessive stress. In addition, since the lower flap fold easy line 17 is formed below the lower edge of the end face panel 2 in this way, the notch 9 of the lower flap 8 is located on the side on the end face panel 2 side in the assembled state. Released. Thereby, since the lower flap 8 does not interfere with the base end edge portion of the upper flap 7 when the packaging boxes are stacked, the upper flap 7 can be easily and reliably fitted into the notch 9.

  In addition, since the packaging box has a ridge portion 15 protruding from the upper edge of the side panel 1, when the packaging box is stacked, the ridge portion 15 of the lower packaging box contacts the upper packaging box. In addition to improving the stability of bar stacking, it increases the sense of unity of the packaging box and improves the aesthetics.

[Second Embodiment]
The packaging box of FIG. 5 shows an embodiment of the present invention that is different from FIG. The packaging box is formed between the side panel 1 and the bottom flap 6, is formed by a notch that is bent at both ends toward the side panel 1, and is formed with a ridge 18 that protrudes below the side panel 1. Yes. The packaging box in FIG. 5 is the same as the packaging box in FIG. 2 except that the protrusion 18 is formed on the lower side of the side panel 1, and the same components are denoted by the same reference numerals. A duplicate description is omitted.

  The packaging box of FIG. 5 has a ridge 18 projecting to the lower side of the side panel 1, and this ridge 18 abuts on the surface on which the packaging box is placed. For this reason, the protrusion 18 not only contacts the lower packaging box when the packaging boxes are stacked to improve stability and aesthetics, but also places the packaging box on the floor or the like. The stability of the case is also improved. For example, when the packaging box is conveyed by a belt conveyor, not only the lower flap 8 but also the ridges 18 are brought into contact with the conveyor belt, so that the conveyance property is good.

[Other Embodiments]
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is not limited to the configuration of the embodiment described above, but is defined by the scope of the claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of the claims. The

  As an example, the packaging box may have a rectangular shape in a plan view with the cylindrical portion having no connection panel.

  In addition, the upper flap of the packaging box sheet may have a base edge width longer than a tip edge width, or may have a shape other than a trapezoid.

  INDUSTRIAL APPLICABILITY The present invention can be widely used as a packaging box, and is particularly used as a packaging box for storing articles that are easily damaged or a packaging box that can be stacked.

DESCRIPTION OF SYMBOLS 1 Side panel 2 Face panel 3 Connection panel 4 Adhesion panel 5 Cover flap 6 Bottom flap 7 Upper flap 8 Lower flap 9 Notch 10 Upper convex part 11 Upper circular arc part 12 Lower convex part 13 Lower circular arc part 14 Cut 15 , 18 Projection 16 Upper flap fold easy line 17 Lower flap fold easy line

Claims (7)

A packaging box sheet that consists of a single sheet and can be assembled into a box shape.
A pair of opposing side panels;
A pair of face panels interposed between the side edges of the pair of side panels,
A pair of lid flaps respectively extending from the upper edges of the pair of side panels, the upper edges butting each other in an assembled state;
A pair of bottom flaps respectively extending from the lower edges of the pair of side panels and having the lower edges butted against each other in the assembled state;
A pair of upper flaps that are respectively extended from the center of the upper edge of the pair of end face panels and are bent to the upper side of the lid flap in an assembled state;
A pair of lower flaps that are respectively extended from the lower edges of the pair of end face panels and bent to the lower side of the bottom flap in an assembled state;
The sheet for packaging boxes, wherein the lower flap has a notch having a shape substantially equal to the upper flap at a position corresponding to the upper flap.   The packaging box sheet according to claim 1, wherein the upper flap has a leading edge width larger than a base edge width.   The packaging box sheet according to claim 1, further comprising a connection panel between the side panel and the end face panel.   The packaging box sheet according to claim 1, 2 or 3, wherein the lower flap has an easy-to-bend line positioned below the lower edge of the face panel.   Formed between the side panel and the lid flap or the bottom flap so as to form a protrusion protruding from the upper edge or lower edge of the side panel in the assembled state, and both ends are bent toward the side panel. The sheet | seat for packaging boxes of any one of Claims 1-4 which has a notch | incision.   The lid flap has an upper convex portion that can be brought into contact with the upper edge of the pair of face panels in the assembled state, and the bottom flap is a lower edge of the pair of face panel in the assembled state. The packaging box sheet according to any one of claims 1 to 5, further comprising a lower convex portion capable of contacting the central portion. Assembling the packaging box sheet according to any one of claims 1 to 6,
The upper flap is attached to the upper side of the lid flap,
A packaging box in which the lower flap is attached to the lower side of the bottom flap.

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