Packing box

Abstract

To provide a packing box capable of suppressing body bulging and preventing buckling of a wall part and a corner part when a load is applied from above in a wraparound type box body.SOLUTION: A packing box 1A includes left and right lateral flaps 61, 61 respectively connected to a side wall 40 via a fold line L1, an upper flap 62 connected to a top plate 20, and a lower flap 63 connected to a bottom plate 30. First inclined ruled lines L10, L11 formed on the side wall 40 and a lateral flap 61 are separated from the fold line L1 upward from the lower end part. A second inclined ruled line L12 formed on the lower flap 63 is separated from the fold line L1 upward from the lower end part.SELECTED DRAWING: Figure 1

Description

Technical Field

[0005] , , , , ,

[0004]

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

Background Art

[0002] When stacking cardboard packaging boxes, due to the load from above, barrel swelling occurs where the wall bulges outward, and ultimately the wall and corners of the barrel part may buckle. Therefore, as a conventional type A packaging box, there is one in which two inclined ruled lines starting from the lower end of the fold line at the corner of the barrel part are arranged in a V shape with the fold line in between (see, for example, Patent Document 1). In this packaging box, when a load acts from above, by regularly deforming the wall part at the inclined ruled line, buckling of the wall part and corners can be prevented, and the appearance can be improved even when the barrel part is deformed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] A wrap-around type packaging box includes a rectangular tube-shaped barrel part having a top plate, a bottom plate, and left and right side walls, left and right horizontal flaps respectively connected to both side walls, an upper flap connected to the top plate, and a lower flap connected to the bottom plate. In the wrap-around type packaging box, end walls are provided at the front and rear openings of the barrel part by overlapping the upper flap and the lower flap on the left and right horizontal flaps.

[0005] When the inclined lines of the aforementioned Type A packaging box are applied to a wrap-around type packaging box, inclined lines are formed on adjacent side walls and side flaps, respectively. In this case, when a load is applied to the body from above, the deformation of the side flaps is prevented by the upper and lower flaps that overlap the side flaps, resulting in the problem that the end walls provided at the opening of the body do not deform regularly.

[0006] The present invention aims to solve the aforementioned problems and provide a packaging box that, in a wrap-around type box, can suppress bulging of the body and prevent buckling of the walls and corners when a load is applied from above. [Means for solving the problem]

[0007] To solve the aforementioned problems, the present invention provides a packaging box comprising a rectangular cylindrical body having a top plate, a bottom plate, and left and right side walls. The packaging box also comprises left and right lateral flaps connected to the side walls via fold lines, an upper flap connected to the top plate and overlapping the two lateral flaps, and a lower flap connected to the bottom plate and overlapping the two lateral flaps. on the wall A first inclined ruled line is formed extending toward the lower end of the broken line, and the first inclined ruled line is inclined with respect to the broken line such that it moves away from the broken line as it extends upward from the lower end. The upper part of the side wall has a horizontal ruled line extending along the upper edge of the side wall and an upper ruled line extending toward the upper end of the first inclined ruled line. The upper ruled line is inclined with respect to the broken line such that it approaches the broken line as it goes upward from its lower end.

[0008] Book In the packaging box of this invention, when a load is applied from above, the walls deform regularly, thereby suppressing bulging and preventing buckling of the walls and corners. As a result, the packaging box of this invention maintains a good appearance even when the walls are deformed by a load from above.

[0009] In the aforementioned packaging box, The lower end of the upper rule line is connected to the upper end of the first inclined rule line. It is preferable. In this configuration, the load from above is applied to the first inclined line along the upper line, and the load from above reliably acts toward the lower end of the corner, thus effectively suppressing bulging of the body. In the aforementioned packaging box, two first inclined lines may be formed on the side wall, front and back, and the horizontal lines may be configured to extend from the upper end of the front first inclined line to the upper end of the rear first inclined line. Alternatively, in the aforementioned packaging box, two upper lines may be formed on the side wall, front and back.

[0010] In the aforementioned packaging box, it is preferable to form branch lines on the side wall that extend toward the upper end of the first inclined line, and to incline the branch lines with respect to the upper edge of the side wall such that they approach the upper edge of the side wall as they move upward from the lower end. In this configuration, the load from above is applied to the first inclined line along the branching line, and the load from above reliably acts toward the lower end of the corner, thus effectively suppressing bulging of the body.

[0011] In the packaging box of the present invention, When a load is applied to the packaging box from above, causing the side wall to deform along the horizontal lines, an inclined surface is formed between the upper edge of the side wall and the horizontal lines. This allows the packaging box to maintain its appearance even when the side wall deforms due to an overhead load. [Effects of the Invention]

[0012] In this invention, when a load is applied from above to a wrap-around packaging box, the walls on both sides of the corners deform regularly, thereby suppressing bulging and preventing buckling of the walls and corners. Therefore, in this invention, the appearance of a wrap-around packaging box can be improved even when the walls are deformed by a load from above. [Brief explanation of the drawing]

[0013] [Figure 1] This is a perspective view of the packaging box according to the first embodiment of the present invention, viewed from the front left upper section. [Figure 2] This is a perspective view of the packaging box according to the first embodiment of the present invention, viewed from the rear upper right. [Figure 3] This figure shows a blank sheet of a packaging box according to the first embodiment of the present invention. [Figure 4]It is a perspective view showing the state before closing the upper flap and the lower flap in the packaging box according to the first embodiment of the present invention. [Figure 5] It is a left side view showing the packaging box according to the first embodiment of the present invention. [Figure 6] It is a front view showing the packaging box according to the first embodiment of the present invention. [Figure 7] It is a left side view showing the packaging box according to the second embodiment of the present invention. [Figure 8] It is a view showing the blank sheet of the packaging box according to the second embodiment of the present invention.

Embodiments for Carrying out the Invention

[0014] The embodiments of the present invention will be described in detail with reference to the drawings as appropriate. In the description of each embodiment, the same reference numerals are given to the same components, and duplicate descriptions are omitted. In the following description, the front-back, left-right directions are set for convenience in explaining the packaging box of the embodiment, and do not limit the configuration of the packaging box of the present invention.

[0015] [First Embodiment] As shown in FIG. 1, the packaging box 1A of the first embodiment is a wrap-around cardboard box including a rectangular tube-shaped body portion 10 having a top plate 20, a bottom plate 30, and left and right side walls 40, 40, and front and rear end walls 60, 60 provided at the front and rear openings of the body portion 10.

[0016] As shown in FIG. 3, the packaging box 1A of the first embodiment is formed by mountain-folding or valley-folding a blank sheet S1 obtained by cutting out a cardboard sheet at each fold line. The blank sheet S1 shown in FIG. 3 is arranged so that the inner surface side is visible. The fold lines of the blank sheet S1 are ruled lines (pressed ruled lines) formed by linearly pressing the surface of the blank sheet S1. Note that intermittent cuts may be formed in the ruled lines. By doing so, it becomes easier to fold the blank sheet S1 at the fold lines. Alternatively, a folded line may be formed by creating a series of intermittent cuts, such as half-cuts where only the surface of the sheet is cut, or cuts that penetrate the sheet, to form a linear shape.

[0017] As shown in Figure 1, the base plate 30 is a rectangular flat plate. The left side wall 40 is attached to the left edge of the base plate 30 via a broken line, and the right side wall 40 is attached to the right edge of the base plate 30. The left and right side walls 40, 40 are identical rectangular walls and are formed perpendicular to the base plate 30.

[0018] A top plate 20 is attached to the upper edge of the left side wall 40 via a folded line. The top plate 20 is a rectangular flat plate, the same shape as the bottom plate 30, and is formed perpendicular to the left side wall 40. A connecting piece 50 is connected to the upper edge of the right side wall 40 via a bent line. The connecting piece 50 extends in a strip shape along the upper edge of the right side wall 40.

[0019] By folding the blank sheet S1 (see Figure 3) along each fold line and joining the connecting piece 50, which is connected to the upper edge of the right side wall 40, to the inner surface of the top plate 20, the right side wall 40, the bottom plate 30, the left side wall 40, and the top plate 20 are formed into a rectangular tube shape.

[0020] The front end wall 60 is equipped with left and right lateral flaps 61, 61 connected to the left and right side walls 40, 40 respectively, an upper flap 62 connected to the top plate 20, and a lower flap 63 connected to the bottom plate 30.

[0021] As shown in Figure 4, the lateral flap 61 is a rectangular flat plate connected to the front edge of the side wall 40 via a fold line L1, and is formed perpendicular to the side wall 40. The left and right lateral flaps 61, 61 are formed symmetrically. In the first embodiment, the left and right lateral flaps 61, 61 are butted together, but the left and right lateral flaps 61, 61 may be arranged with a gap between them in the left-right direction.

[0022] As shown in Figure 1, the upper flap 62 is a rectangular flat plate connected to the front edge of the top plate 20 via a fold line, and is formed perpendicular to the top plate 20. The upper flap 62 is superimposed on the upper part of the outer surfaces of the left and right lateral flaps 61, 61.

[0023] The upper flap 62 and the lower flap 63 are formed symmetrically. The lower flap 63 is connected to the front edge of the base plate 30 via a fold line and overlaps the lower part of the outer surfaces of the left and right lateral flaps 61, 61.

[0024] The upper flap 62 and the lower flap 63 are attached to the left and right lateral flaps 61, 61 with adhesive. In the first embodiment, the upper flap 62 and the lower flap 63 are spaced apart in the vertical direction, but the upper flap 62 and the lower flap 63 may be placed together.

[0025] The front end wall 60 and the rear end wall 60 are formed symmetrically. On the rear end wall 60, as shown in Figure 2, the upper flap 62, which is connected to the rear edge of the top plate 20, and the lower flap 63, which is connected to the rear edge of the bottom plate 30, are attached to the outer surfaces of the left and right lateral flaps 61, 61, which are connected to the rear edges of the left and right side walls 40, 40 via a fold line L1.

[0026] As shown in Figure 5, the left side wall 40 has two first inclined lines L10, L10 at the front and back, two first upper lines L30, L30 at the front and back, and a horizontal line L40. The first inclined lines L10, the first upper line L30, and the horizontal line L40 are lines (pressed lines) formed by pressing linearly into the inner surface of the side wall 40.

[0027] The first inclined rule line L10 is a straight rule line extending in the vertical direction. The front first inclined rule line L10 is formed on the front part of the side wall 40, and the rear first inclined rule line L10 is formed on the rear part of the side wall 40.

[0028] The first inclined line L10 on the front side is inclined with respect to the front bend line L1 (front edge) of the side wall 40, moving away from the front bend line L1 as it extends upward from the lower end. In other words, the first inclined line L10 on the front side is inclined with respect to the lower edge of the side wall 40 such that its upper end is positioned behind its lower end. The first inclined line L10 on the front side extends toward the lower end of the front bend line L1.

[0029] The front and rear first inclined lines L10, L10 are formed symmetrically. The rear first inclined line L10 moves away from the rear bend line L1 (rear edge) of the side wall 40 as it moves upward from the lower end.

[0030] The first inclined line L10 of the side wall 40 is formed at an inclination angle between 60 and 80 degrees with respect to the lower edge of the side wall 40. Preferably, the inclination angle of the first inclined line L10 with respect to the lower edge of the side wall 40 is 70 degrees.

[0031] The upper end of the first inclined line L10 is separated from the upper edge of the side wall 40, and the lower end of the first inclined line L10 is separated from the lower edge of the side wall 40. In addition, the upper ends of the front and rear first inclined lines L10 are spaced apart in the front-to-back direction.

[0032] The first upper rule line L30 is, Anteroposterior direction These are straight lines extending in that direction. The first upper line L30 on the front side is formed on the front upper part of the side wall 40, and the first upper line L30 on the rear side is formed on the rear upper part of the side wall 40.

[0033] The first upper line L30 on the front side is inclined with respect to the upper edge of the side wall 40 such that its front end is positioned higher than its rear end. The first upper line L30 on the front side is inclined with respect to the front bend line L1 (front edge) of the side wall 40 as it moves upward from its lower end. The front first upper line L30 extends toward the upper end of the front first inclined line L10. In the first embodiment, the lower end of the front first upper line L30 is connected to the upper end of the front first inclined line L10. The upper end of the first upper line L30 is separated from the upper edge of the side wall 40.

[0034] The front and rear first upper score lines L30, L30 are formed symmetrically. The rear first upper score line L30 approaches the rear bend line L1 (rear edge) of the side wall 40 as it moves upward from the lower end.

[0035] The horizontal line L40 is located at the top of the side wall 40. Anteroposterior direction It is formed in the central part. The horizontal rule line L40 is a straight line that extends from the upper end of the front first inclined rule line L10 to the upper end of the rear first inclined rule line L10. The horizontal rule line L40 is also parallel to the upper edge of the side wall 40.

[0036] As shown in Figure 2, the right side wall 40 also has two first inclined lines L10, L10 at the front and back, two first upper lines L30, L30 at the front and back, and a horizontal line L40, similar to the left side wall 40.

[0037] As shown in Figure 6, the front end wall 60 has two first inclined lines L11, L11 on the left and right, two second inclined lines L12, L12 on the left and right, and two second upper lines L31, L31 on the left and right. The first inclined lines L11, the second inclined lines L12, and the second upper lines L31 are lines (pressed lines) formed by pressing linearly into the inner surface of the end wall 60.

[0038] The first inclined rule line L11 is a straight line extending in the vertical direction, as shown in Figure 4. The left first inclined rule line L11 is formed on the left horizontal flap 61, and the right first inclined rule line L11 is formed on the right horizontal flap 61.

[0039] The first inclined line L11 on the left side is inclined with respect to the left-side fold line L1 (left edge) of the left horizontal flap 61, moving away from it as it extends upward from its lower end. In other words, the first inclined line L10 on the left side is inclined with respect to the lower edge of the end wall 60 such that its upper end is positioned to the right of its lower end. The first inclined line L10 on the left side extends toward the lower end of the left-side fold line L1.

[0040] The left and right first inclined lines L11, L11 are formed symmetrically. The right first inclined line L10 moves away from the right-hand fold line L1 (right edge) of the right horizontal flap 61 as it moves upward from the bottom end.

[0041] The first inclined line L11 is formed at an inclination angle between 60 and 80 degrees with respect to the lower edge of the end wall 60. Preferably, the inclination angle of the first inclined line L11 with respect to the lower edge of the end wall 60 is 70 degrees.

[0042] The upper end of the first inclined line L11 is separated from the upper edge of the upper flap 62. In the first embodiment, as shown in Figure 6, the upper end of the first inclined line L10 is positioned between the lower edge of the upper flap 62 and the upper edge of the lower flap 63. Also, the upper ends of the left and right first inclined lines L11, L11 are spaced apart in the left-right direction. The lower part of the first inclined line L11 is covered by the lower flap 63 (see Figure 4). The lower end of the first inclined line L11 is separated from the lower edge of the end wall 60.

[0043] The left and right second inclined lines L12, L12 are formed on the lower flap 63. The second inclined lines L12 are straight lines that extend in the vertical direction.

[0044] The second inclined line L12 on the left is inclined with respect to the left-side bend line L1 (left edge) of the end wall 60, moving away from it as it extends upward from its lower end. In other words, the second inclined line L12 on the left is inclined with respect to the lower edge of the end wall 60 such that its upper end is positioned to the right of its lower end. The second inclined line L12 on the left extends toward the lower end of the left-side bend line L1.

[0045] The left and right second inclined lines L12, L12 are formed symmetrically. The right second inclined line L12 moves away from the right-hand bend line L1 (right edge) of the end wall 60 as it moves upward from the lower end.

[0046] The second inclined line L12 is formed at an inclination angle between 60 and 80 degrees with respect to the lower edge of the end wall 60. Preferably, the inclination angle of the second inclined line L12 with respect to the lower edge of the end wall 60 is 70 degrees.

[0047] The upper end of the second inclined line L12 is separated from the upper edge of the lower flap 63, and the lower end of the second inclined line L12 is separated from the lower edge of the end wall 60. In addition, the upper ends of the left and right second inclined lines L12, L12 are spaced apart in the left-right direction.

[0048] The second inclined crease L12 is formed along the first inclined crease L11, on the outer side of the lower part of the first inclined crease L11. Preferably, the second inclined crease L12 is positioned so as to overlap the lower part of the first inclined crease L11 when viewed from the front of the packaging box 1, or slightly offset to the left or right of the lower part of the first inclined crease L11.

[0049] The left and right second upper rule lines L31, L31 are formed on the upper flap 62. The second upper rule line L31 is a straight rule line extending in the left-right direction.

[0050] The second upper rule line L31 on the left is inclined with respect to the upper edge of the end wall 60 such that its left end is positioned higher than its right end. The second upper rule line L31 on the left is inclined with respect to the left-side bend line L1 (left edge) of the end wall 60 as it moves upward from its lower end. The second upper rule line L31 on the left extends toward the upper end of the first inclined rule line L11 on the left. The lower end of the second upper rule line L31 is separated from the upper end of the first inclined rule line L11. Also, the upper end of the second upper rule line L31 is separated from the upper edge of the end wall 60.

[0051] The left and right second upper lines L31, L31 are formed symmetrically. The right second upper line L31 approaches the right-hand bend line L1 (right edge) of the end wall 60 as it moves upward from the lower end.

[0052] In the first embodiment, the left and right second upper grid lines L31, L31 formed on the upper flap 62 and the left and right second inclined grid lines L12, L12 formed on the lower flap 63 are formed symmetrically in the vertical direction.

[0053] As shown in Figure 2, the rear end wall 60 also has two first inclined lines L11, L11 on the left and right, two second inclined lines L12, L12 on the left and right, and two second upper lines L31, L31 on the left and right, similar to the front end wall 60.

[0054] In the packaging box 1A of the first embodiment, as shown in Figures 1 and 2, two first inclined lines L10 and L11, starting from the lower end of the fold line L1 at the corner between the side wall 40 and the lateral flap 61, are arranged in a V-shape on either side of the fold line L1. In the packaging box 1A of the first embodiment, two first inclined lines L10 and L11 are formed at each corner: the front right, rear right, front left, and rear left. Furthermore, in the packaging box 1A of the first embodiment, a second inclined crease L12 is formed on the lower flap 63 of the end wall 60, extending in the same direction as the first inclined crease L11 of the lateral flap 61.

[0055] In the packaging box 1A described above, when a load is applied to the body 10 from above, the side walls 40 and the lateral flaps 61 deform regularly along the first inclined lines L10 and L11, and the lower flap 63 deforms regularly along the second inclined line L12. As a result, the left and right lateral flaps 61, 61 can be deformed regularly on the first inclined line L11 without being obstructed by the lower flap 63.

[0056] Therefore, when a load is applied from above to the wrap-around packaging box 1A, the walls deform regularly, suppressing bulging and preventing buckling of the walls and corners. As a result, the wrap-around packaging box 1A maintains a good appearance even when its walls are deformed by a load from above.

[0057] Furthermore, in the packaging box 1A of the first embodiment, the load from above acts along the first inclined crease lines L10 and L11 toward the lower end of the corner. In addition, in the packaging box 1A of the first embodiment, the load from above is concentrated along the first upper crease line L30 toward the first inclined crease line L10, and along the second upper crease line L31 toward the first inclined crease line L11. Therefore, in the packaging box 1A of the first embodiment, the load from above is reliably applied toward the lower end of the corner, so that bulging of the box can be effectively suppressed.

[0058] In the packaging box 1A of the first embodiment, when a load is applied from above and the side wall 40 deforms along the horizontal line L40, an inclined surface is formed between the upper edge of the side wall 40 and the horizontal line L40. Therefore, in the packaging box 1A of the first embodiment, the appearance can be improved even when the side wall 40 is deformed by a load applied from above.

[0059] 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 modified as appropriate without departing from its spirit. In the packaging box 1A of the first embodiment, as shown in Figures 1 and 2, the entire first inclined lines L10 and L11 are formed in a straight line, but it is sufficient that at least the lower part of the first inclined lines L10 and L11 is formed in a straight line, and the upper part of the first inclined lines L10 and L11 may be curved or bent.

[0060] In the packaging box 1A of the first embodiment, two first upper creases L30 are formed on the side wall 40, and two second upper creases L31 are formed on the end wall 60, but the number of first upper creases L30 and second upper creases L31 is not limited. For example, Reference examples of the present invention include: It is not necessary to form a first upper scribe line L30 on the side wall 40. Also, it is not necessary to form a second upper scribe line L31 on the end wall 60. Furthermore, the shapes of the first upper rule line L30 and the second upper rule line L31 are not limited, and the entire first upper rule line L30 and the entire second upper rule line L31 may be curved.

[0061] In the packaging box 1A of the first embodiment, the first inclined crease L11 of the end wall 60 and the first inclined crease L10 of the side wall 40 are inclined at the same angle with respect to the fold line L1. However, the first inclined crease L11 of the end wall 60 and the first inclined crease L10 of the side wall 40 may be inclined at different angles with respect to the fold line L1.

[0062] In the packaging box 1A of the first embodiment, horizontal lines L40 are formed on the side wall 40, but horizontal lines may also be formed on the end wall 60. Furthermore, the shape of the horizontal lines L40 is not limited, and the horizontal lines L40 may be curved or bent.

[0063] Although the packaging box 1A in the first embodiment is made of corrugated cardboard, the packaging box may be formed from various known types of paperboard.

[0064] [Second Embodiment] Next, the packaging box 1B of the second embodiment will be described. As shown in Figures 7 and 8, the packaging box 1B of the second embodiment has substantially the same configuration as the packaging box 1A of the first embodiment (see Figure 1), but the configuration of the creases formed on the side wall 40 is different.

[0065] The packaging box 1B of the second embodiment is formed by folding the blank sheet S2 shown in Figure 8 along each fold line, either as a mountain fold or a valley fold. The blank sheet S2 shown in Figure 8 is positioned so that its inner surface is visible.

[0066] In the second embodiment, the horizontal ruled line L40 is positioned between the upper end of the front first inclined ruled line L10 and the upper end of the rear first inclined ruled line L10. Both ends of the horizontal ruled line L40 in the second embodiment are separated from the front and rear first inclined ruled lines L10, L10.

[0067] In the side wall 40 of the second embodiment, the front and rear vertical lines L50, L50 extend downward from the front and rear ends of the horizontal line L20. The left and right vertical lines L50, L50 are straight lines that extend in the vertical direction. The front vertical ruled line L50 slopes relative to the front broken line L1, moving away from it as it goes downwards from the top edge. The vertical ruled line L50 at the rear is inclined relative to the broken line L1 at the rear, moving away from it as it goes downwards from the top edge. The spacing between the front and back vertical lines L50, L50 narrows from the top to the bottom. The lower ends of both vertical lines L50, L50 are separated from the lower edge of the side wall 40.

[0068] In the side wall 40 of the second embodiment, a front branch line L60 extending toward the upper end of the front first inclined line L10 and a rear branch line L60 extending toward the upper end of the rear first inclined line L10 are formed.

[0069] The front branch line L60 is inclined with respect to the upper edge of the side wall 40 such that its rear end is positioned higher than its front end. The front branch line L60 is inclined with respect to the upper edge of the side wall 40 such that it approaches the upper edge of the side wall 40 as it moves upward from its lower end. The lower end of the front branch line L60 is connected to the upper end of the front first inclined line L10. The upper end of the front branch line L60 is separated from the upper edge of the side wall 40.

[0070] The front and rear branch lines L60, L60 are formed symmetrically. The rear branch line L60 is inclined with respect to the upper edge of the side wall 40 such that its front end is positioned higher than its rear end.

[0071] As shown in Figure 8, the right side wall 40 also has the same front and rear first inclined lines L10, L10, horizontal line L40, front and rear vertical lines L50, L50, and front and rear branching lines L60, L60 as the left side wall 40.

[0072] In the packaging box 1B of the second embodiment, as shown in Figure 7, the load from above is concentrated on the first inclined line L10 along the first upper line L30 and the branch line L60, so that the load from above can be reliably applied toward the lower end of the corner.

[0073] Furthermore, in the packaging box 1B of the second embodiment, a load is applied from the horizontal line L40 to the front and rear vertical lines L50, L50, and the side wall 40 deforms regularly at both vertical lines L50, L50, thereby suppressing bulging of the side wall 40.

[0074] Although a second embodiment of the present invention has been described above, the present invention is not limited to the second embodiment, and, as with the first embodiment, can be modified as appropriate without departing from its spirit. [Explanation of Symbols]

[0075] 1A Packaging box (first embodiment) 1B Packaging box (second embodiment) 10 Torso 20 Top plate 30 Bottom plate 40 side wall 50 Joint piece 60 End wall 61 Side flap 62 Top flap 63 Lower flap L1 is a broken line graph. L10 First sloping ruled line L11 First sloping rule line L12 Second sloping grid line L30 First upper grid line L31 Second upper grid line L40 Horizontal ruled lines L50 Vertical ruled lines L60 Branching line S1 Blank sheet (first embodiment) S2 Blank Sheet (Second Embodiment)

Claims

1. A rectangular cylindrical body having a top plate, a bottom plate and left and right side walls, Left and right lateral flaps are connected to the aforementioned side walls via a fold line, An upper flap connected to the top plate and superimposed on the two side flaps, It comprises a lower flap connected to the bottom plate and superimposed on the two side flaps, A first inclined line is formed on the side wall, extending toward the lower end of the broken line. The first inclined ruled line is inclined with respect to the broken line such that it moves away from the broken line as it goes upward from the lower end. The upper part of the side wall is formed with a horizontal ruled line extending along the upper edge of the side wall and an upper ruled line extending toward the upper end of the first inclined ruled line. The upper ruled line is inclined with respect to the broken line such that it approaches the broken line as it moves upward from the lower end. A packaging box characterized in that the lower end of the upper ruled line is connected to the upper end of the first inclined ruled line.

2. A rectangular cylindrical body having a top plate, a bottom plate and left and right side walls, Left and right lateral flaps are connected to the aforementioned side walls via a fold line, An upper flap connected to the top plate and superimposed on the two side flaps, It comprises a lower flap connected to the bottom plate and superimposed on the two side flaps, Two first inclined lines are formed on the side wall, extending toward the lower end of the broken line. The first inclined ruled line is inclined with respect to the broken line such that it moves away from the broken line as it goes upward from the lower end. The upper part of the side wall is formed with a horizontal ruled line extending along the upper edge of the side wall and an upper ruled line extending toward the upper end of the first inclined ruled line. The aforementioned horizontal ruled line extends from the upper end of the front first inclined ruled line to the upper end of the rear first inclined ruled line. A packaging box characterized in that the upper ruled line is inclined with respect to the fold line such that it approaches the fold line as it moves upward from the lower end.

3. A rectangular cylindrical body having a top plate, a bottom plate and left and right side walls, Left and right lateral flaps are connected to the aforementioned side walls via a fold line, An upper flap connected to the top plate and superimposed on the two side flaps, It comprises a lower flap connected to the bottom plate and superimposed on the two side flaps, A first inclined line is formed on the side wall, extending toward the lower end of the broken line. The first inclined ruled line is inclined with respect to the broken line such that it moves away from the broken line as it goes upward from the lower end. The upper part of the side wall is formed with a horizontal ruled line extending along the upper edge of the side wall and two upper ruled lines extending toward the upper end of the first inclined ruled line. A packaging box characterized in that the upper ruled line is inclined with respect to the fold line such that it approaches the fold line as it moves upward from the lower end.

4. A rectangular cylindrical body having a top plate, a bottom plate and left and right side walls, Left and right lateral flaps are connected to the aforementioned side walls via a fold line, An upper flap connected to the top plate and superimposed on the two side flaps, It comprises a lower flap connected to the bottom plate and superimposed on the two side flaps, The aforementioned side wall has, A first inclined ruled line extending toward the lower end of the aforementioned broken line, A branch line extending toward the upper end of the first inclined line is formed, The first inclined ruled line is inclined with respect to the broken line such that it moves away from the broken line as it goes upward from the lower end, The aforementioned branching lines are arranged so that they approach the upper edge of the side wall as they move upward from the lower end. It is inclined with respect to the upper edge of the aforementioned side wall, The upper part of the side wall is formed with a horizontal ruled line extending along the upper edge of the side wall and an upper ruled line extending toward the upper end of the first inclined ruled line. A packaging box characterized in that the upper ruled line is inclined with respect to the fold line such that it approaches the fold line as it moves upward from the lower end.

Images