Packing box

Abstract

To provide a packaging box that is openable by easily opening a lid part.SOLUTION: A packaging box 1A comprises a trunk part 10 provided with an end wall 11 and a side wall 12, and an upper lid part 20 provided at an opening of the trunk part 10. The upper lid part 20 comprises a side part flap 50. A base end edge part of the side part flap 50 is continuously provided at an edge part of the side wall 12, and a tip part 51 of the side part flap 50 is connected to the end wall 11. A belt-like cutting open guide part 60 extending to a rear edge part from a front edge part of the side part flap 50 is provided at a boundary part between a base end part 52 and the tip part 51 of the side part flap 50. Further, an intermediate cutting guide line 70 extending in a right-left direction is formed at an intermediate part in a front-back direction of the tip part 51 of the side part flap 50.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a packaging box. [Background technology]

[0002] A type A packaging box made of cardboard has a cylindrical body and upper and lower lids provided at the upper and lower openings of the body, and the lids are formed by overlapping left and right side flaps onto the outer surfaces of the front and rear end flaps. In the above-mentioned packaging box, the lid is closed by attaching the side flaps to the end flaps with an adhesive such as hot melt (see, for example, Patent Document 1), or by attaching adhesive tape to the butt joints of the left and right side flaps. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 11-301639 Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional packaging boxes described above, when opening the lid, it is necessary to strongly pull up the side flaps and peel them off from the end flaps, or carefully peel off the adhesive tape from the butt joints of the side flaps, making it difficult to open the lid.

[0005] An object of the present invention is to solve the above-mentioned problems and to provide a packaging box whose lid can be easily opened and opened. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention provides a packaging box comprising a cylindrical body having front and rear end walls and left and right side walls, and a lid provided at an opening in the vertical direction of the body. Front and rear end flaps are connected to the front and rear end walls, respectively, and left and right side walls are connected to the front and rear end flaps. Left and right side flaps and, It has. The base end edge of the end flap is connected to the vertical edge of the end wall, The base end edge of the side flap is connected to the vertical edge of the side wall, and the tip end of the side flap is The end flap is overlapped on the outer surface of the end flap, and the end flap is The side flaps are connected to the end walls. A strip-shaped opening / cutting guide portion is provided at the boundary between the tip and base ends of the side flaps, extending from the front edge to the rear edge of the side flaps. A middle cutting guide line is formed at the middle of the tip of the side flaps in the front-rear direction, extending in the left-right direction. A tear guide is provided extending from the left edge to the right edge of the end flap.

[0007] When opening the packaging box of the present invention, first, the opening cut guide portion is cut from the side flap to divide the side flap into a tip portion and a base portion. This allows the base portion of the side flap to be opened to the left and right. Next, the middle cut guide line is cut open to divide the tip portion of the side flap into front and rear portions. This allows the tip portion of the side flap to be opened to the front and rear.

[0008] The opening / cutting guide portion may be formed by a zipper having left and right perforations extending in the front-rear direction and a tear strip formed between the left and right perforations. Also, a cutting tape may be attached to the inner surface of the opening / cutting guide portion, the cutting tape extending across the front and rear edges of the side flaps. In these configurations, by pulling up one end of the zipper or one end of the cutting tape, it becomes easy to cut off the opening / cutting guide portion from the side flap.

[0009] In the packaging box of the present invention, the opening / cutting guide portion extends along the boundary between the side wall and the side flap. In this configuration, when a blank sheet for a packaging box is manufactured by an existing corrugator, the sheet is passed in one direction through the corrugator, so that the boundary and the opening / cutting guide portion extending in one direction can be formed in the sheet. Effect of the Invention

[0010] In the packaging box of the present invention, the lid can be easily opened without peeling the flaps apart or the adhesive tape, and the blank sheet can be formed using an existing corrugator. [Brief description of the drawings]

[0011] [Figure 1] 1 is a perspective view of a packaging box according to a first embodiment of the present invention, viewed from the upper left front side. FIG. [Diagram 2] 1 is a diagram showing a blank sheet for a packaging box according to a first embodiment of the present invention. FIG. [Diagram 3] 1 is a perspective view showing a state in which an opening / cutting guide portion is cut away from a top lid portion of a packaging box according to a first embodiment of the present invention. FIG. [Figure 4] 1 is a perspective view showing a state in which a top lid portion of a packaging box according to a first embodiment of the present invention is open. [Diagram 5] FIG. 11 is a perspective view of a packaging box according to a second embodiment of the present invention, as viewed from the upper front left. [Figure 6] FIG. 11 is a diagram showing a blank sheet for a packaging box according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the description of each embodiment, the same components are denoted by the same reference numerals, and duplicate descriptions will be omitted. In the following description, the front, rear, left and right directions are set for the convenience of describing the packaging box of this embodiment, and do not limit the configuration of the packaging box of the present invention.

[0013] [First embodiment] 1, the packaging box 1A of the first embodiment includes a cylindrical body 10, an upper lid 20 closing an upper opening of the body 10, and a lower lid 30 closing an opening on a lower side of the body 10. The packaging box 1A of the first embodiment is an A-type cardboard box.

[0014] The packaging box 1A of the first embodiment is formed by mountain-folding or valley-folding a blank sheet S1 cut out from a cardboard sheet at each fold line, as shown in Fig. 2. The blank sheet S1 shown in Fig. 2 is arranged so that the inner side is visible. The fold lines of the blank sheet S1 are creases (pressed creases) formed by linearly pressing the surface of the blank sheet S1. Note that the creases may be formed with intermittent cuts. In this way, it becomes easier to fold the blank sheet S1 at the creases. Alternatively, the folded line may be formed by forming a half-cut slit only on the surface of the sheet or a slit penetrating the sheet in an intermittent linear fashion.

[0015] Each cutting guide line formed on the blank sheet S1 is a perforated line formed by discontinuously forming slits. Note that the shape and length of the slits are not limited.

[0016] As shown in Fig. 1, the body 10 has a pair of front and rear end walls 11, 11 and a pair of left and right side walls 12, 12. The end walls 11 and the side walls 12 are formed in a rectangular shape. The end walls 11 and the side walls 12 are connected vertically via a folding line. The upper and lower surfaces of the body 10 have rectangular openings.

[0017] The top cover portion 20 has a pair of front and rear end flaps 40, 40 connected to the front and rear end walls 11, 11, respectively, and a pair of left and right side flaps 50, 50 connected to the left and right side walls 12, 12, respectively.

[0018] The end flaps 40 are connected via fold lines to the upper edge of the end wall 11. The front end flap 40 covers the front part of the upper opening of the body 10, and the rear end flap 40 covers the rear part of the upper opening of the body 10. The front and rear end flaps 40, 40 are arranged with an interval between them in the front-to-rear direction.

[0019] The base end edge of the side flap 50 is connected via a fold line to the upper edge of the side wall 12. The front part of the side flap 50 is overlapped on the outer surface (upper surface) of the front end flap 40, and the rear part of the side flap 50 is overlapped on the outer surface (upper surface) of the rear end flap 40.

[0020] The left side flap 50 covers the left half of the upper opening of the torso 10, and the right side flap 50 covers the right half of the upper opening of the torso 10. The leading edge portions of the left and right side flaps 50, 50 are butted against each other at the center of the upper opening of the body portion 10 in the left-right direction.

[0021] The front and rear inner surfaces (lower surfaces) of the tip portion 51 of the side flap 50 are attached to the outer surfaces (upper surfaces) of the front and rear end flaps 40, 40, respectively, with adhesives 55, 55 such as hot melt. As a result, the tip 51 of the side flap 50 is connected to the end wall 11 via the end flap 40 .

[0022] The front and rear end flaps 40, 40 and the left and right side flaps 50, 50 form the top lid portion 20, which closes the upper opening of the body portion 10. In the packaging box 1A of the first embodiment, the entire top cover portion 20 is closed, but a part of the top cover portion 20 may be open.

[0023] The lower cover portion 30 is configured symmetrically to the upper cover portion 20 from top to bottom, and as shown in Figure 2, has front and rear end flaps 40, 40 connected to the lower edges of both end walls 11, 11, respectively, and left and right side flaps 50, 50 connected to the lower edges of both side walls 12, 12, respectively. Then, the lower cover portion 30 is formed by attaching the side flaps 50, 50 to the outer surfaces (lower surfaces) of the end flaps 40, 40.

[0024] The top cover 20 of the packaging box 1A of the first embodiment is provided with an opening / cutting guide portion 60 at the boundary between the tip end 51 and base end 52 of the side flap 50, as shown in FIG. The opening / cutting guide portion 60 is a strip-shaped portion extending linearly from the front edge to the rear edge of the side flap 50. The opening / cutting guide portion 60 is formed parallel to the boundary line (fold line) between the side wall 12 and the side flap 50. The opening / cutting guide portion 60 is disposed approximately in the center of the side flap 50 in the left-right direction.

[0025] The opening / cutting guide portion 60 of the first embodiment is a zipper consisting of left and right perforations 61, 61 extending in the front-rear direction and a tear strip 62 formed between the perforations 61, 61. The perforations 61 are tearing guide lines formed by discontinuously forming slits. A cutting start portion 63, the width of which increases in the left-right direction toward the front edge, is formed at the end of the opening and cutting guide portion 60. Slits are formed at the left and right edges of the cutting start portion 63.

[0026] An intermediate cutting guide line 70 extending in the left-right direction is formed in the center in the front-rear direction of the tip 51 of the side flap 50. The intermediate cutting guide line 70 is formed in a straight line from the tip edge of the side flap 50 to the opening cutting guide portion 60.

[0027] When the blank sheet S1 shown in Fig. 2 is manufactured by an existing corrugator, a cardboard sheet is passed through the corrugator in one direction, front to back, to form slits and folds in the sheet. At this time, the portion that will become the side flap 50 passes through the cutter of the corrugator in one direction, front to back, to form two perforations 61, 61 extending in the front to back direction in the side flap 50. In this way, the blank sheet S1 having the opening and cutting guide portion 60 can be manufactured by an existing corrugator.

[0028] In addition, when the blank sheet S1 is manufactured using a corrugator, two cutting guide lines are formed in the end flap 40 as in the side flap 50, but the cutting guide lines in the end flap 40 are not used when opening the package.

[0029] When opening the packaging box 1A of the first embodiment, as shown in FIG. 3, first, the opening strip 62 is pulled up from the cutting start portion 63 on one end side of the opening / cutting guide portion 60 toward the other end, and the two perforations 61, 61 are cut open from one end to the other end. When the opening / cutting guide portion 60 is cut off from the side flap 50 , the side flap 50 is divided into a tip portion 51 and a base portion 52 . In this state, the tip portions 51 of the side flaps 50 are joined to the front and rear end flaps 40, 40 by the front and rear adhesives 55, 55. As shown in FIG. 4, the base ends 52, 52 of the side flaps 50, 50 can be opened outward in the left-right direction.

[0030] Next, the intermediate cutting guide line 70 is cut open, and the tip portion 51 of the side flap 50 is divided into front and rear portions. This allows the front parts of the tips 51 of the side flaps 50 to be opened forward together with the front end flap 40. Also, the rear parts of the tips 51 of the side flaps 50 to be opened backward together with the rear end flap 40.

[0031] In the packaging box 1A described above, as shown in FIG. 3, the opening and cutting guide portion 60, which is a zipper, is cut from the side flap 50 to divide the side flap 50 into left and right halves, and further, as shown in FIG. 4, the middle cutting guide line 70 is cut open to divide the side flap 50 into front and rear halves, and the top cover portion 20 is opened, thereby making it possible to easily open the packaging box 1A.

[0032] Although the first embodiment of the present invention has been described above, the present invention is not limited to the first embodiment, and can be appropriately modified without departing from the spirit of the present invention. In the packaging box 1A of the first embodiment, as shown in Fig. 1, the end flap 40 and the side flap 50 are attached with an adhesive 55, but the configuration for connecting the tip 51 of the side flap 50 to the end wall 11 is not limited. For example, an adhesive tape may be attached to the outer surface of the butted portion where the tip portions 51, 51 of the left and right side flaps 50, 50 meet, and both ends of the adhesive tape may be attached to the outer surfaces of the front and rear end walls 11, 11.

[0033] The top cover 20 of the packaging box 1A of the first embodiment is composed of front and rear end flaps 40, 40 and left and right side flaps 50, 50. As a reference example of the present invention, The top cover portion 20 may be formed by only the left and right side flaps 50, 50.

[0034] The body 10 of the packaging box 1A in the first embodiment is formed into a rectangular cylindrical shape, but the shape of the body 10 is not limited thereto, and an inclined wall may be provided between the end wall 11 and the side wall 12 to form a hexagonal or octagonal body.

[0035] The packaging box 1A of the first embodiment is made of corrugated cardboard, but the packaging box may be made of various known paperboards.

[0036] [Second embodiment] Next, a packaging box 1B according to a second embodiment will be described. As shown in Fig. 5, the packaging box 1B according to the second embodiment has a configuration substantially similar to that of the packaging box 1A according to the first embodiment (see Fig. 1), but differs in that a cutting tape 81 is provided in the opening / cutting guide portion 80.

[0037] The packaging box 1B of the second embodiment is formed by mountain-folding or valley-folding the blank sheet S2 shown in Fig. 6 at each fold line. The blank sheet S2 is arranged so that the inner side is visible.

[0038] In the packaging box 1B of the second embodiment, a resin cutting tape 81 is attached to the inner surface of the opening / cutting guide portion 80. As shown in FIG. 5, the cutting tape 81 extends linearly from the front edge to the rear edge of the side flap 50. At the end of the opening / cutting guide portion 80, a cutting start portion 83 is formed, the width of which in the left-right direction increases toward the edge.

[0039] When manufacturing the blank sheet S2 shown in Fig. 6, a cardboard sheet is passed through a corrugator in one direction, front to back, to form slits and folds in the sheet. At this time, the portions that will become the side flaps 50 pass through the cutters of the corrugator in one direction, so that the cutting tape 81 extending in the front to back direction can be attached to the side flaps 50. In this way, the blank sheet S2 having the opening cutting guide portion 80 can be manufactured by an existing corrugator.

[0040] When the blank sheet S2 is manufactured by the corrugator, the cut tape 81 is attached to the end flap 40 as well as to the side flap 50, but the cut tape 81 on the end flap 40 is not used when opening the package.

[0041] When opening the packaging box 1B of the second embodiment, when the cutting tape 81 is pulled up from one end of the opening cutting guide portion 80 shown in FIG. This separates the side flaps 50 into the tip end 51 and the base end 52, allowing the base ends 52, 52 of the both side flaps 50, 50 to be opened outward in the left-right direction. Next, the intermediate cutting guide line 70 is cut open, and the tip portion 51 of the side flap 50 is divided into front and rear portions, so that the tip portion 51 of the side flap 50 can be opened front and rear.

[0042] The above describes the second embodiment of the present invention. However, the present invention is not limited to the second embodiment, and similarly to the first embodiment, it can be modified appropriately without departing from the spirit of the present invention. [Explanation of symbols]

[0043] 1A Packaging box (first embodiment) 1B Packaging box (second embodiment) 10. Torso 11 End Wall 12 Side wall 20 Top cover 30 Lower lid part 40 End flap 50 Side flap 51 Tip 52 Proximal end 55 Adhesive 60 Opening and cutting guide portion (first embodiment) 61 Perforation 62 Opening Belt 63 Cutting start portion (first embodiment) 70 Intermediate cutting guide wire 80 Opening and cutting guide portion (second embodiment) 81 Cut Tape 83 Cutting start portion (second embodiment) S1 Blank sheet (first embodiment) S2 Blank sheet (second embodiment)

Claims

1. a cylindrical body portion having front and rear end walls and left and right side walls, and a lid portion provided at the vertical openings of the body portion, wherein the lid portion has front and rear end flaps respectively connected to the front and rear end walls, and left and right side flaps respectively connected to the left and right side walls, the base edge portion of the end flap is connected to the vertical edge portion of the end wall, the base edge portion of the side flap is connected to the vertical edge portion of the side wall, the tip portion of the side flap is overlapped on the outer surface of the end flap and connected to the end wall via the end flap, a strip-shaped unsealing cutting guide portion extending from the front edge portion to the rear edge portion of the side flap is provided at the boundary portion between the tip portion and the base portion of the side flap, an intermediate cutting guide line extending in the left-right direction is formed at the intermediate portion in the front-rear direction of the tip portion of the side flap, and a cutting guide portion extending from the left edge portion to the right edge portion of the end flap is provided. A packaging box characterized by this.

2. The packaging box according to Claim 1, wherein the unsealing cutting guide portion is a zipper consisting of left and right perforations extending in the front-rear direction, and an unsealing band formed between the two perforations. A packaging box characterized by this.

3. The packaging box according to Claim 1, wherein a cut tape extending over the front and rear edge portions of the side flap is attached to the inner surface of the unsealing cutting guide portion. A packaging box characterized by this.

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