JP3072764U - Packaging box - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent rattling on the bottom surface of a folding packaging box using thick paperboard or the like. SOLUTION: Bottom flaps 26, 30 connected to a pair of opposed side surfaces 10, 14 and another pair of side surfaces 12, 1 are provided.
6, a bottom surface is formed from the auxiliary pieces 28 and 32 connected to
In a packaging box that can be folded flat by pressing two corners, crease lines 64, 66 between the auxiliary pieces 28, 32 and the side faces 12, 16 provided continuously therewith.
Is formed above the folding lines 46 and 44 between the bottom flaps 26 and 30 and the side faces 10 and 14 connected to the bottom flaps by a length corresponding to the paper thickness of the packaging box. .

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 This invention relates to a packaging box in which a box body composed of four side plates and a foldable bottom surface can be folded into a flat side plate. The present invention relates to a packaging box that is almost horizontal and does not rattle.

[0002]

[Prior art]

 There is known a packaging box which is supplied in a state of being folded flat and can be assembled in a rectangular parallelepiped shape with one touch. Such a packaging box is designed to be folded flat by pressing the diagonal corners of the four corners of the side surface. That is, the four folded pieces forming the bottom face are integrally connected to the lower side of the four side faces forming the body, and the glued piece connected to one of the side faces is attached to the other side face. The body of the box is formed, two of the four folded pieces forming the bottom face are stuck on the diagonal part, and the other diagonal parts are free of sticking, and the opposing folded pieces are free. Assemble them so that they cross each other. When folding, the diagonal portion in a free state is pressed in the circumferential direction to be deformed into a rhombus shape, and the four folding pieces forming the bottom surface forming portion are folded inside the side surface.

When a packaging box having this shape is formed of a thick paper so as to have sufficient strength and to maintain the shape, when the packaging box is assembled, the folding pieces are double-folded on the bottom surface. There were three overlapping and non-overlapping parts, and there was a level difference on the bottom surface, which prevented it from being level. For this reason, when the packaging box is assembled, the conveyor belt is moved, and the side is automatically stamped, there is a problem that it is difficult to stamp the packaging box at an accurate position by rattling. In particular, when the bottom had a rectangular shape, it often tended to rattle along the long side. Japanese Patent No. 2892969 (known example 1) and Japanese Unexamined Patent Application Publication No. 9-110031 (known example 2) disclose packaging boxes that can be assembled with the bottom surface horizontal to solve these problems.

[0004]

[Problems to be solved by the invention]

 In the known example 1, the double part of the folded piece forming the bottom surface must be set to about half the thickness and the triple part to about one third thickness. The adjustment of the length was very troublesome. If the material is not synthetic resin but paper, it is almost impossible to finely adjust the thickness. In the known example 2, it is necessary to form a protruding piece at the tip of the bottom flap in order to eliminate the step on the bottom surface, which requires an extra material. Further, in the known example 2, the steps are eliminated to some extent inside the packaging box, but are not eliminated outside.

[0005] This invention has been made in view of the above-mentioned problems of the conventional technology, and even when a packaging box made of a thick material is assembled, a step on the bottom surface is reduced when the packaging box is assembled. The purpose is to provide a packaging box that can be horizontal.

[0006]

[Means for Solving the Problems]

 This invention comprises four side surfaces forming a body, a bottom flap connected to a pair of opposing side surfaces thereof, and an auxiliary piece connected to another pair of side surfaces. The bottom flap and the auxiliary piece are bonded to each other by a joint formed by a diagonal crease line at a side end of the bottom flap to form a bottom surface, and flattening can be performed by pressing two corners having no joint. In such a packaging box, the auxiliary piece has a length substantially half the distance between the other pair of side faces, and a protrusion having the same length as the auxiliary piece is attached to an edge of the auxiliary piece bonded to the joint. A notch is formed along the edge of the adjacent bottom flap on the opposite side of the protrusion, and a crease line is formed between the auxiliary piece and the side face connected to the auxiliary piece. From the crease between the bottom flap and the side flanking it, A packing box, characterized in that only the thickness of the component is formed on the upper side.

The packaging box according to claim 1, wherein a lateral width of a side surface connected to an upper end of the auxiliary piece is longer than a lateral width of a side surface connected to an upper end of the bottom flap.

[Embodiment of the invention]

An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 to 4 show an embodiment of the present invention. As shown in FIG. 1, a packaging box of this embodiment is formed by punching out one blank sheet to form a box forming piece 100. ing . The box-forming piece 100 has side surfaces 10, 12, 14, and 16, which are foldably connected to each other via crease lines 36, 38, and 40 in the order of 10, 12, 14, and 16. The lateral widths of the side surfaces 12 and 16 are formed longer than the lateral widths of the side surfaces 10 and 14. A glued piece 17 is connected to the left end of the side face 16 via a fold line 42.

Bottom flaps 30 and 26 are connected to lower ends of the side surfaces 14 and 10 via folding lines 44 and 46, respectively, so as to be bent. At the left end sides of these bottom flaps 30 and 26, joining portions 35 and 34 each forming a substantially triangular shape are formed continuously through diagonal crease lines 48 and 50, respectively.

On the other hand, auxiliary pieces 28 and 32 are connected to the lower ends of the other opposing side plates 12 and 16 via folding lines 64 and 66, respectively, so that they can be bent. The length from the fold lines 64, 66 to the edges of the auxiliary pieces 28, 32 is formed to be approximately half the distance between the side surfaces 12, 16 or the width of the side surfaces 10, 14. Projections 76, 78 extend from the right half of the auxiliary pieces 28, 32, and fold lines 60, 62 are formed diagonally at the right ends of the projections. The length from the crease lines 64, 66 to the edge of the projections 76, 78 is formed substantially equal to the interval between the side surfaces 12, 16, that is, the lateral width of the side surfaces 10, 14. In other words, the length from the crease lines 64, 66 to the edges of the protrusions 76, 78 is formed about twice the length from the crease lines 64, 66 to the edges of the auxiliary pieces 28, 32. ing. Further, cutouts 72 and 74 are formed on the left end sides of the auxiliary pieces 28 and 32 along the edges of the adjacent bottom flaps 30 and 26 when the packaging box is assembled. These bottom flaps 26, 30 and auxiliary pieces 28, 32 are bonded by joints 34, 35 so that a bottom plate can be assembled.

A cover plate 18 is connected to an upper end of the side surface 12 via a fold line 52, and an insertion piece 20 is connected to an upper end of the cover plate 18 via a fold line 54. The flaps 24 and 22 are connected to the upper ends of the side surfaces 14 and 10 via folding lines 70 and 68, respectively.

A method for gluing a packaging box according to this embodiment will be described. Here, FIG. 1 is an exploded view as viewed from the front side of the packaging box. In FIG. 1, a folding manner in which the front side of the paper is convex is referred to as forward folding, and a folding manner in which the rear side of the paper is concave is referred to as reverse folding. First, from the developed view of FIG. 1, the crease lines 64 and 66 are forward-folded, and the auxiliary flaps 28 and 32 are overlapped on the side surfaces 12 and 16, respectively. Next, the crease lines 44 and 46 are folded forward, and the bottom flap 30 and the joint 35 are overlapped on the side surface 14, and the bottom flap 26 and the joint 34 are overlapped on the side surface 10. Then, the fold lines 48 and 50 are reversely folded, the joints 35 and 34 are overlapped with the bottom flaps 30 and 26, and glue 90 is applied to the back surfaces of the joints 35 and 34. Next, glue 90 is applied to the surface of the glued piece 17, folded in the order of the crease lines 40 and 36, and the glued piece 17 is inserted between the side face 10 and the bottom flap 26, and The back surface and the surface of the glued piece 17, the back surface of the joint 34 and the surface of the auxiliary piece 28, and the back surface of the joint 35 and the surface of the auxiliary piece 32 are glued. This completes the gluing of the packaging box.

When the folding lines 36 and 40 are pressed toward the center of the packaging box, the folding lines 36, 38, 40 and 42 open at 90 degrees as shown in FIG. At the same time, the crease lines 46, 64, 44, 66 are opened at 90 degrees, and the bottom flaps 26, 30, the auxiliary pieces 28, 32, and the joints 34, 35 are at right angles to the side surfaces 10, 12, 14, 16. , A bottom surface is formed. While the auxiliary pieces 28 and 32 are formed at right angles to the side surfaces 12 and 16, the edge portions of the crease lines 60 and 62 are caught on the side surfaces 10 and 14. As a result, the crease lines 60 and 62 are slightly folded, and the outer edges of the auxiliary pieces 28 and 32 outside the crease lines 60 and 62 are bent inward, so that the auxiliary pieces 28 and 32 are removed from the side. It is formed at right angles to 12 and 16. After the auxiliary pieces 28 and 32 are formed at right angles to the side surfaces 12 and 16, the crease lines 60 and 62 return to a state in which they extend flat.

As shown in FIG. 3, the bottom surface formed by the bottom flaps 26 and 30, the joints 34 and 35, the auxiliary pieces 28 and 32, and the projections 76 and 78 is aligned with the bottom flap 30 and its edge. The protrusion 78 covers the gap between the notch 72 of the adjacent auxiliary piece 28 from the inside of the packaging box, and projects from the gap between the bottom flap 26 and the notch 74 of the adjacent auxiliary piece 32 along the edge. The part 76 is shaped to cover from the inside of the box. The auxiliary pieces 28 and 32 are joined to each other at the center of the edge thereof, and a protrusion 76 extending from the auxiliary piece 28 extends from the auxiliary piece 32 inside the notch 74 side of the auxiliary piece 32. The protrusion 78 overlaps the inside of the auxiliary piece 28 on the side of the cutout 72. At this time, the overlap of the paperboard on the bottom is suppressed to a maximum of double.

The bottom flap 30 and the joint 35 overlap the auxiliary piece 32 and the projection 78 doubly, but as shown in FIG. The bottom flap 30 is formed at right angles to the side surface 14 because the bottom flap 30 is formed at the upper side by the thickness of the formed paper, and the bottom flap 30, the auxiliary piece 32 on which the joint 35 overlaps inside, and the paper of the projection 78 are formed. Does not bulge outward by the thickness of

Similarly, the bottom flap 26 and the joint 34 overlap the auxiliary piece 28 and the projection 76 doubly, but the fold line 64 forms a packaging box rather than the fold line 46. Since the bottom flap 26 is formed at a right angle to the side surface 10 by the thickness of the paper, the bottom flap 26 and the joining portion 34 are formed by the auxiliary pieces 28 and the protrusions 76 which are overlapped on the inside. It does not bulge outward.

If the width of the two pairs of side surfaces forming the packaging box is different, that is, if the bottom surface is rectangular, the auxiliary pieces 28 and 32 are connected to the long side surfaces 12 and 16 of the long side. It is good to do. This is because the length from the crease lines 64, 66 to the edges of the projections 76, 78 may be set to be substantially the same as the width of the short side surfaces 10, 14 having a shorter width. This is because the lengths of the projections 76 and 78 can be set short, and the box forming piece for making the packaging box can be efficiently removed from the blank sheet made of paper. The shorter the length of the auxiliary pieces 28, 32 and the protrusions 76, 78, the better the workability when assembling the packaging box. In addition, the edge portions on the side surfaces 10 and 14 side of the bottom surface are constituted by one of the bottom flaps 26 and 30. Since there is no cross section of the double overlapped joint portions 34 and 35, the length which is most likely to rattle. This is because rattling in the side surface direction of the side can be prevented.

Note that the packaging box of the present invention is not limited to the above-described embodiment, and can be appropriately changed in material, shape of each member, and the like.

[0019]

[Effect of the invention]

 In the packaging box of this embodiment, the overlapping of the paperboard on the bottom surface is suppressed to a maximum of two layers, and the bottom surface of the packaging box is flattened by suppressing the step on the bottom surface, thereby eliminating the rattling of the bottom surface of the assembled packaging box. Since the bottom surface does not rattle, the product can be stored efficiently and the correct location can be stamped. Also, it can be manufactured with the same manufacturing process and cost as the conventional technology, and is easy to glue and assemble.

[Brief description of the drawings]

FIG. 1 is a development view of a packaging box according to an embodiment of the present invention.

FIG. 2 is a schematic bottom perspective view showing a process of assembling the packaging box of the embodiment.

FIG. 3 is a bottom perspective view of a state where the packaging box of this embodiment is assembled.

FIG. 4 is a partially enlarged side view of the packaging box of this embodiment.

[Explanation of symbols]

10, 12, 14, 16 Side face 17 Glue piece 18 Cover plate 20 Insert piece 22, 24 Flap 26, 30 Bottom flap 34, 35 Joint 28, 32 Auxiliary piece 36, 38, 40, 42, 44, 46, 48, 50, 5
2, 54, 64, 66, 68, 70 Folded line 72, 74 Notch 76, 78 Projection 90 Glue 100 Box forming piece

Claims (2)

[Utility model registration claims] A bottom flap connected to a pair of opposing side surfaces thereof and an auxiliary piece connected to another pair of side surfaces. The bottom flap and the auxiliary piece are adhered to each other by a joint formed by a diagonal crease line at a side end of the flap to form a bottom surface, and flattening is performed by pressing two corners having no joint. In the packaging box, the auxiliary piece has a length substantially half of the interval between the other pair of side faces, and the edge of the auxiliary piece bonded to the joint portion has the same length as the auxiliary piece. A protrusion is extended, a cutout is formed along the edge of the adjacent bottom flap on the opposite side of the protrusion, and a crease line between the auxiliary piece and the side surface connected thereto is formed. From the fold line between the bottom flap and the side surface connected to the bottom flap, A packaging box characterized by being formed on the upper side by an appropriate amount. 2. The packaging box according to claim 1, wherein a lateral width of a side surface connected to an upper end of the auxiliary piece is longer than a lateral width of a side surface connected to an upper end of the bottom flap.