Packing box

Abstract

To provide a packaging box which does not easily injure a finger when the box is pulled up by putting a hand through a handle hole.SOLUTION: A packaging box 1A has a folded plate 60 disposed within a handhold hole 50 formed in a wall part 10. The folded plate 60 is connected to an upper edge part 51 of the handhold hole 50 via the folding lines L10 and L20. The upper edge part 51 of the handhold hole 50 has formed therein an intermediate edge part 51a extending laterally and two inclined edge parts 51b and 51b extending obliquely upward from both ends of the middle edge part 51a. The folded plate 60 has formed therein an intermediate plate 61 connected to the intermediate edge part 51a, and two side plates 62 and 62 connected to both inclined edge parts 51b and 51b, respectively.SELECTED DRAWING: Figure 3

Description

Technical Field

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

Background Art

[0002] As a cardboard packaging box, there is one that includes a bottom plate, a cylindrical wall portion connected to the edge of the bottom plate, and a top plate connected to the upper edge portion of the wall portion, and a handle hole formed in the wall portion is closed by a folding plate (see, for example, Patent Document 1). When lifting such a packaging box, the folding plate is pushed inward to open the handle hole.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above - mentioned conventional packaging box, when the folding plate is folded upward and inward with respect to the wall portion, a single fold line is formed at the upper edge portion of the handle hole. In this configuration, there is a problem that when the upper edge portion of the handle hole is grasped and lifted, the fingers are likely to get hurt.

[0005] An object of the present invention is to solve the above - mentioned problem and provide a packaging box in which the fingers are less likely to get hurt when the handle hole is grasped and lifted.

Means for Solving the Problems

[0006] To solve the above - mentioned problems, the present invention provides a packaging box including a bottom plate and a cylindrical wall portion connected to the edge of the bottom plate. A handle hole is formed in the wall portion, and a folding plate is disposed in the handle hole. The folding plate is connected to the upper edge portion of the handle hole via a fold line. At the upper edge portion of the handle hole, in the horizontal directionin a straight line The extending intermediate edge and the ends of the intermediate edge each extend diagonally upward in a straight line extended , bent upward with respect to the intermediate edge portion Two inclined edges are formed. The folded plate is formed with an intermediate plate connected to the intermediate edge and two side plates connected to each of the two inclined edges. The side plate is connected to the side edge of the intermediate plate via a slit.

[0007] In the packaging box of the present invention, when the folded-over plate is pushed inward, a lateral fold is formed between the upper ends of the inclined edges of the handle hole, and a portion of the wall and the folded-over plate are folded inward at this fold. Furthermore, by folding the folded-over plate upward along the fold line, the folded-over plate can be folded back to the inner surface of the wall. Thus, in the packaging box of the present invention, the folded plate is folded back to the inner surface of the wall via two ridges (folds). As a result, when you place your hand on the upper edge of the handle hole and pull up the packaging box of the present invention, your fingers come into contact with the strip-shaped surface between the two ridges, making it less likely for your fingers to become sore.

[0008] In the packaging box of the present invention, the fold-over plate is divided into an intermediate plate and a side plate. Therefore, when the fold-over plate is folded inward, the intermediate plate and the side plate are folded independently. This allows the fold-over plate to be folded back to the inner surface of the wall even if the upper edge of the handle hole is bent. Furthermore, it prevents the side plate of the fold-over plate from rubbing strongly against the contents when it comes into contact with them.

[0009] When the packaging box of the present invention is made of corrugated cardboard, it is preferable that the corrugations of the corrugated cardboard in the wall portion extend in the horizontal direction. In this configuration, when the folded plate is pushed inward, a lateral fold can be formed in the wall with minimal force.

[0010] In the wall portion of the aforementioned packaging box, an auxiliary fold line extending laterally may be formed between the upper ends of the two inclined edges. In this configuration, when the folded plate is pushed inward, the auxiliary fold lines allow for the creation of clean, horizontal folds in the wall section with minimal force. For example, even if the corrugations of the cardboard wall section extend vertically, making it difficult to fold the wall section vertically, it becomes easier to create horizontal folds in the wall section.

[0011] If the aforementioned packaging box includes a top plate connected to the upper edge of the wall portion, it is preferable that the folding plate be configured to contact the inner surface of the top plate when the folding plate is folded upward and inward relative to the wall portion. In this configuration, when a hand is placed in the handle hole and the box is lifted, a portion of the upward force acting on the upper edge of the handle hole can be supported by the folded plate. This prevents the handle hole from deforming and the wall from tearing when the packaging box is lifted. [Effects of the Invention]

[0012] In the packaging box of the present invention, the folded plate is folded back to the inner surface of the wall via two ridges, and when you place your hand on the upper edge of the handle hole and pull it up, your fingers come into contact with the strip-shaped surface between the two ridges, making it less likely for your fingers to get sore. [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 figure shows a blank sheet of a packaging box according to the first embodiment of the present invention. [Figure 3] A front view showing the handle hole and folded flap of a packaging box according to the first embodiment of the present invention. [Figure 4] This is a front view showing the state in which the folding plate is being folded back against the end wall in a packaging box according to the first embodiment of the present invention. [Figure 5] This is a side cross-sectional view showing a packaging box according to the first embodiment of the present invention, with the folded-over plate folded back against the end wall. [Figure 6]It is a front view showing a carrying hole and a folding plate of a packing box according to a second embodiment of the present invention. [Figure 7] It is a view showing a blank sheet of a packing box according to a second embodiment of the present invention.

Mode for Carrying Out the Invention

[0014] 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 will be omitted. In the following description, the front-back, left-right directions are set for convenience in explaining the packing box of the present embodiment, and do not limit the configuration and usage state of the packing box of the present invention.

[0015] [First Embodiment] As shown in FIG. 1, the packing box 1A of the first embodiment includes a bottom plate 20, a cylindrical wall portion 10 continuously provided at an edge of the bottom plate 20, and a top plate 30 continuously provided at an upper edge of the wall portion 10. The packing box 1A of the first embodiment is a corrugated box of the wraparound type. The wall portion 10 of the first embodiment is formed in a rectangular cylindrical shape by four wall bodies, namely, a pair of front and rear end walls 11, 11 and a pair of left and right side walls 12, 12.

[0016] The contents to be accommodated in the packing box 1A of the first embodiment are not limited. However, in the first embodiment, as shown in FIG. 4, the case of accommodating a plastic bottle as the content P will be described as an example. A plurality of contents P are accommodated side by side in four columns on the left and right in the packing box 1A of the first embodiment.

[0017] As shown in FIG. 2, the packing box 1A of the first embodiment is formed by mountain-folding or valley-folding a blank sheet S1 obtained by cutting out a corrugated sheet at each fold line. The blank sheet S shown in FIG. 2 is arranged so that the inner surface side is visible. In the blank sheet S1 of the first embodiment, the corrugations (flutes) of the cardboard extend in the left-right direction (horizontal direction) as shown in Figure 2.

[0018] The fold lines on the blank sheet S1 are creasing lines (pressed lines) formed by pressing linearly into the surface of the blank sheet S1. Intermittent cuts may also be formed along the creasing lines. This makes it easier to fold the blank sheet S1 along the fold lines. Alternatively, a folded line may be formed by creating intermittent cuts in the sheet, such as half-cuts that cut only the surface, or cuts that penetrate the sheet, to create a linear pattern.

[0019] The cutting guide line of the blank sheet S1 is formed by a single continuous slit or a line with multiple slits formed intermittently. Alternatively, the cutting guide line may be formed by a half-cut line.

[0020] The base plate 20 is a rectangular flat plate, as shown in Figure 1 (see Figure 2). The left side wall 12 is connected to the left edge of the base plate 20 via a folded line, and the right side wall 12 is connected to the right edge of the base plate 20 via a folded line. The left and right side walls 12, 12 are identical rectangular walls and are formed perpendicular to the base plate 20.

[0021] A top plate 30 is attached to the upper edge of the left side wall 12 via a folded line. The top plate 30 is a rectangular flat plate, the same shape as the bottom plate 20, and is formed perpendicular to the left side wall 12. By folding the blank sheet S1 (see Figure 2) along each fold line and joining the connecting piece 13, which is connected to the upper edge of the right side wall 12, to the inner surface of the top plate 30, the right side wall 12, the bottom plate 20, the left side wall 12, and the top plate 30 are formed into a rectangular cylindrical shape.

[0022] The front end wall 11 comprises a pair of upper and lower outer flaps 14, 14 connected to the front edges of the top plate 30 and bottom plate 20, respectively, and a pair of left and right inner flaps 15, 15 connected to the front edges of the left and right side walls 12, 12, respectively. The outer flaps 14, 14 are superimposed and joined to the outer surfaces of the inner flaps 15, 15. In this embodiment, the outer flaps 14, 14 are spaced apart in the vertical direction, and the inner flaps 15, 15 are spaced apart in the horizontal direction. In the first embodiment, as shown in Figure 3, the corrugated layers of the outer flap 14 extend in the left-right direction (lateral direction).

[0023] As shown in Figure 1, the rear end wall 11 of the packaging box 1A has a symmetrical configuration with the front end wall 11, and is composed of upper and lower outer flaps 14, 14 and left and right inner flaps 15, 15.

[0024] As shown in Figure 3, a handhold hole 50 is formed in the upper outer flap 14 of the front end wall 11. The handle hole 50 is located between the left and right inner flaps 15, 15 and penetrates the center of the outer flap 14. The handle hole 50 is the part that the user places their hand on when carrying the packaging box 1A. The gripping hole 50 is wider in the left-right direction than in the up-down direction. In other words, the gripping hole 50 has a wide shape in the left-right direction.

[0025] The upper edge 51 of the gripping hole 50 has an intermediate edge 51a and left and right inclined edges 51b, 51b formed on both the left and right sides of the intermediate edge 51a. The intermediate edge portion 51a extends linearly in the left-right direction (lateral direction) along the corrugation of the outer flap 14. The left-side inclined edge 51b extends diagonally upward to the left from the left end of the intermediate edge 51a. The right-side inclined edge 51b extends diagonally upward to the right from the right end of the intermediate edge 51a. Thus, the upper edge 51 of the grip hole 50 is bent upward on both sides relative to the middle section.

[0026] The middle portion of the lower edge 52 of the grip hole 50 extends in a straight line parallel to the middle portion of the upper edge 51. In addition, the left and right portions of the lower edge 52 are bent upward relative to the middle portion.

[0027] The opening shape of the gripping hole 50 is such that the left and right sides are bent upward relative to the middle section. In addition, the left and right side edges 53, 53 of the gripping hole 50 are curved in a semicircular shape so as to protrude outward in the left-right direction.

[0028] A folded-over plate 60 is positioned inside the handle hole 50. The folded-over plate 60 is formed in the same shape as the opening of the handle hole 50. In other words, the handle hole 50 is closed by the folded-over plate 60. As shown in Figure 4, when carrying the packaging box 1A, the folded-over plate 60 is pushed inward to open the handle hole 50.

[0029] As shown in Figure 3, the folded plate 60 has an intermediate plate 61 connected to the intermediate edge 51a of the upper edge 51 of the handhold hole 50, and two side plates 62, 62 connected to the left and right inclined edges 51b, 51b of the upper edge 51 of the handhold hole 50.

[0030] The intermediate plate 61 is the part that covers the central part of the hand grip hole 50 in the left-right direction, and is formed in a rectangular shape. The upper edge of the intermediate plate 61 is connected to the intermediate edge 51a of the upper edge 51 of the hand grip hole 50 via the first bend line L10. The lower edge of the intermediate plate 61 is connected to the lower edge 52 of the hand grip hole 50 via the cutting guide line L30.

[0031] The left side plate 62 is the part that covers the left side of the handhold hole 50. The upper edge of the left side plate 62 is connected to the left inclined edge 51b of the upper edge 51 of the handhold hole 50 via a second bend line L20. The right edge of the left side plate 62 is connected to the left edge of the intermediate plate 61 via a slit L40. Furthermore, of the edges of the left side plate 62, all edges except the upper and right edges are connected to the left side edge 53 of the handhold hole 50 via a cutting guide wire L30. The upper left side of the cutting guide wire L30 is cut upward from the left end of the second bent line L20 (the left end of the inclined edge 51b).

[0032] The right side plate 62 is the part that covers the right side of the handgrip hole 50. The upper edge of the right side plate 62 is connected to the right inclined edge 51b of the upper edge 51 of the handgrip hole 50 via a second bend line L20. The left edge of the right side plate 62 is connected to the right edge of the intermediate plate 61 via a slit L40. Furthermore, of the edges of the right side plate 62, all edges except the upper and left edges are connected to the right side edge 53 of the handhold hole 50 via a cutting guide wire L30. The upper right side of the cutting guide wire L30 is cut upward from the right end of the second bent line L20 (the right end of the inclined edge 51b).

[0033] The two slits L40, L40 on the left and right are formed with a gap between them in the left-right direction (lateral direction). In the first embodiment, the left and right slits L40, L40 are parallel to each other.

[0034] In packaging box 1A, as shown in Figure 1, the upper outer flap 14 of the rear end wall 11 also has a handle hole 50 and a folded-over plate 60, similar to the front end wall 11.

[0035] As shown in Figure 4, when opening the handle hole 50 with the contents P contained in the packaging box 1A, the folded plate 60 is pushed inward. This cuts open the cutting guide line L30, and the edges of the folded plate 60 other than the upper edge are separated from the opening edge of the handle hole 50. Furthermore, when the folded plate 60 is pushed inward from the end wall 11, both slits L40, L40 of the folded plate 60 are cut open, separating the intermediate plate 61 from the side plates 62, 62.

[0036] When the folded plate 60 is pushed inward, a fold L50 extending laterally is formed between the upper ends of the two inclined edges 51b, 51b of the handhold hole 50. At this fold L50, a portion of the end wall 11 and the folded plate 60 are bent inward. Furthermore, since the cutting guide line L30 is cut upward from the end of the fold L50, it is possible to prevent the end wall 11 from tearing from the end of the fold L50.

[0037] Furthermore, as shown in Figure 5, the intermediate plate 61 is bent upward and inward relative to the end wall 11 at the first folding line L10, and the side plate 62 is bent upward and inward relative to the end wall 11 at the second folding line L20, and the folded back plate 60 is folded back to the inner surface side of the end wall 11.

[0038] In this way, by folding the folding plate 60 back towards the inner surface of the end wall 11 at the fold line L50, the first fold line L10, and the second fold line L20, the handhold hole 50 of the end wall 11 can be opened.

[0039] In the packaging box 1A of the first embodiment, as shown in Figure 3, the vertical length L2 of the intermediate plate 61 of the folded plate 60 is larger than the vertical distance L1 between the upper edge of the end wall 11 and the upper edge 51 of the handle hole 50. Therefore, as shown in Figure 5, when the folded plate 60 is folded back to the inner surface of the end wall 11, the tip of the intermediate plate 61 comes into contact with the inner surface (bottom surface) of the top plate 30. As a result, the upper part of the end wall 11, the top plate 30, and the folded plate 60 form a truss structure.

[0040] In the packaging box 1A of the first embodiment described above, as shown in Figure 5, the end wall 11 is folded back to the inner surface side via two ridges (folds). As a result, when you place your hand on the upper edge 51 of the handle hole 50 and pull up the packaging box 1A, your fingers come into contact with the strip-shaped surface between the two ridges, making it less likely for your fingers to become sore.

[0041] In the packaging box 1A of the first embodiment, as shown in Figure 3, the corrugated cardboard in the outer flap 14 of the end wall 11 extends in the left-right direction (lateral direction). Therefore, as shown in Figure 4, when the folded plate is pushed inward, a lateral fold L50 can be formed in the end wall 11 with little force.

[0042] In the packaging box 1A of the first embodiment, the fold-over plate 60 is divided into an intermediate plate 61 and side plates 62, 62. Therefore, when folding the fold-over plate 60 inward, the intermediate plate 61 and side plates 62, 62 are folded independently. As a result, even if the upper edge 51 of the handle hole 50 is bent, the fold-over plate 60 can be folded back to the inner surface of the end wall 11. Furthermore, in the packaging box 1A of the first embodiment, when the side plate 62 of the folded plate 60 comes into contact with the contents P, it is possible to prevent the side plate 62 from rubbing strongly against the contents P.

[0043] In the packaging box 1A of the first embodiment, as shown in Figure 5, when the folded plate 60 is folded upward and inward relative to the end wall 11, the folded plate 60 comes into contact with the inner surface of the top plate 30. In this configuration, when a hand is placed in the handle hole 50 and the box is lifted, a portion of the upward force acting on the upper edge 51 of the handle hole 50 can be supported by the folded plate 60. This prevents the handle hole 50 from deforming and the end wall 11 from tearing when the packaging box 1A is lifted.

[0044] 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 Figure 3, the left and right slits L40, L40 are parallel, but the lateral spacing between the left and right slits L40, L40 may be formed to narrow as it goes downwards.

[0045] In the packaging box 1A of the first embodiment, the handle hole 50 is closed by the folded plate 60, but the folded plate 60 may be configured to cover only a portion of the handle hole 50.

[0046] In the first embodiment, the packaging box 1A has a wall portion 10 formed in a rectangular cylindrical shape, as shown in Figure 1. However, the shape of the wall portion 10 is not limited, and for example, the wall portion 10 may be formed in a polygonal cylindrical shape such as a hexagon or an octagon.

[0047] The packaging box 1A of the first embodiment is a wrap-around type corrugated cardboard box, but the shape of the box is not limited, and for example, it may be an A-type corrugated cardboard box or a tray-shaped box with an open top.

[0048] 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.

[0049] [Second Embodiment] Next, the packaging box 1B of the second embodiment will be described. The packaging box 1B of the second embodiment shown in Figure 6 is a corrugated cardboard box of type A (see Figure 7). The handle hole 50 of the packaging box 1B in the second embodiment has substantially the same configuration as the handle hole 50 of the packaging box 1A in the first embodiment, except that an auxiliary fold line L60 is formed on the end wall 11.

[0050] The packaging box 1B of the second embodiment is formed by folding the blank sheet S2 shown in Figure 7 along each fold line, either as a mountain fold or a valley fold. The blank sheet S2 shown in Figure 7 is positioned so that its inner surface is visible. In the blank sheet S2 of the second embodiment, the corrugations (flutes) of the cardboard extend in the vertical direction (up and down) as shown in Figure 7.

[0051] In the packaging box 1B of the second embodiment, an auxiliary fold line L60 extending laterally is formed between the upper ends of the two inclined edges 51b, 51b of the handle hole 50. In this configuration, when the folded plate 60 is pushed inward, a fold is formed between the upper ends of the two inclined edges 51b, 51b of the handhold hole 50 by the auxiliary fold line L60.

[0052] As a result, even if the corrugated cardboard in the outer flap 14 of the end wall 11 extends vertically and it is difficult to fold the outer flap 14 vertically, when the folding plate 60 is pushed inward, the auxiliary fold line L60 makes it easier to form a horizontal fold in the outer flap 14 (end wall 11).

[0053] 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. For example, the packaging box 1B of the second embodiment is a corrugated cardboard box of type A, but the form of the box is not limited. [Explanation of Symbols]

[0054] 1A Packaging box (first embodiment) 1B Packaging box (second embodiment) 10 Wall section 11 End wall 12 Side wall 13 Joint piece 14 Outer flap 15 Inner flap 20 Bottom plate 30 Top plate 50 Handhold holes 51 Upper edge 51a Middle edge 51b Sloping edge 52 Lower edge 53 Side edge 60 Folding board 61 Intermediate plate 62 Side panel L10 First broken line L20 Second broken line L30 cutting guide wire L40 Slit L50 fold L60 Auxiliary polyline P Contents S1 Blank sheet (first embodiment) S2 Blank Sheet (Second Embodiment)

Claims

1. It is a packaging box, The base plate and It comprises a cylindrical wall portion connected to the edge of the bottom plate, A handhold hole is formed in the wall portion, A folding plate is placed inside the aforementioned handhold hole, The aforementioned folded plate is connected to the upper edge of the handhold hole via a fold line, The upper edge of the aforementioned handhold hole is The intermediate edge extends in a straight line horizontally, Two inclined edges are formed, extending linearly diagonally upward from both ends of the intermediate edge and bending upward relative to the intermediate edge. The aforementioned folding plate has, An intermediate plate connected to the aforementioned intermediate edge, Two side plates are attached to each of the aforementioned inclined edges, and The packaging box is characterized in that the side panels are connected to the side edges of the intermediate panels via slits.

2. A packaging box according to claim 1, It is made of cardboard, A packaging box characterized in that the corrugations of the corrugated cardboard in the wall portion extend horizontally.

3. A packaging box according to claim 1, A packaging box characterized in that, in the wall portion, an auxiliary fold line extending laterally is formed between the upper ends of the two inclined edges.

4. A packaging box according to claim 1, The wall portion is equipped with a top plate connected to the upper edge of the wall portion, A packaging box characterized in that when the folded-over plate is folded upward and inward relative to the wall portion, the folded-over plate is configured to abut against the inner surface of the top plate.

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