Packing box

Abstract

To provide a packaging box capable of preventing a top from opening when pulled by a hand grasping the top through a handle hole in the top.SOLUTION: A packaging box 1 includes a top 30 comprising end flaps 40 and right and left side flaps 50, 50, The end flaps 40 are laid on outer surfaces of both side flaps 50, 50, and insertion portions 41 of the respective end flaps 40 are each inserted into an insertion hole 51 of the side flap 50, A handle hole 43 is formed in each of the end flaps 40 and a recess 53 is formed in a tip edge of each of the side flaps 50, Ends in left and right directions of the handle hole 43 in the end flap 40 are coincide with the recesses 53 of the side flaps 50.SELECTED DRAWING: Figure 1

Description

Technical Field

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

Background Art

[0002] As the top of a cardboard packaging box, there are front and rear end flaps and left and right side flaps. Some have the end flaps overlapped on the outer surfaces of the side flaps and the insertion portions of the end flaps inserted into the insertion openings of the side flaps. Further, in the packaging box shown in Patent Document 1, a handle hole is formed in the end flap.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When moving the above-mentioned conventional packaging box, if you grasp the handle hole of the end flap and pull, only the end flap will be pulled, so there is a problem that the end flap is likely to come off from the side flap.

[0005] An object of the present invention is to solve the above problems and provide a packaging box that can prevent the top from opening when pulling by grasping the handle hole at the top.

Means for Solving the Problems

[0006] [[ID=To solve the aforementioned problems, the present invention provides a packaging box comprising: a cylindrical body having front and rear end walls and left and right side walls; a bottom provided at the lower opening of the body; and a top provided at the upper opening of the body. The top comprises an end flap connected to the end wall and left and right side flaps connected to the left and right side walls, respectively. The end flap is superimposed on the outer surface of the side flaps, and an insertion portion formed in the end flap is inserted into an insertion opening formed in the side flap. A handle hole is formed in the end flap, and a recess is formed at the leading edge of the side flap. The left and right ends of the handle hole in the end flap overlap the recess in the side flap.

[0007] In this configuration, when a hand is inserted into the handle hole of the end flap, the hand is also inserted into the recess of the side flap. This allows the user to grip both the end flap and the side flap when moving the packaging box of the present invention, and to pull both the end flap and the side flap together, thereby preventing the end flap from coming off the side flap.

[0008] In the aforementioned packaging box, it is preferable to form a fold line extending in the left-right direction on the end flap. In this configuration, when inserting the end flap's insertion portion into the side flap's insertion opening, the end flap is folded in a mountain fold along the fold line, and then the end flap is straightened out, allowing the insertion portion to be easily inserted into the opening at a shallow insertion angle. Furthermore, in the above configuration, when opening the top, the end flaps are folded in a mountain fold along the fold line, making it easier for the insertion part of the end flap to come out of the insertion opening of the side flap. In this way, the above configuration prevents the top from opening when moving the packaging box, while making it easy to open the top when opening the packaging box.

[0009] In the aforementioned packaging box, it is preferable to form the insertion portion at the left-right corner of the tip of the end flap, and to form an engagement recess between the insertion portion and the central part of the tip edge of the end flap. In this configuration, the engagement recess of the end flap and the edge of the insertion opening of the side flap interlock, making it difficult for the end flap to detach from the side flap. [Effects of the Invention]

[0010] In this invention, by inserting a hand into the handle hole at the top of the packaging box and gripping the end flaps and side flaps, it is possible to prevent the end flaps from coming off the side flaps and to prevent the top from opening when moving the packaging box. [Brief explanation of the drawing]

[0011] [Figure 1] This is a perspective view of a packaging box according to an 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 an embodiment of the present invention. [Figure 3] This is a partially enlarged perspective view showing the top of a packaging box according to an embodiment of the present invention. [Figure 4] This is a side cross-sectional view showing the top of a packaging box according to an embodiment of the present invention. [Figure 5] This is a perspective view of a packaging box according to an embodiment of the present invention, with both side flaps closed. [Figure 6] This is a perspective view showing an embodiment of the present invention of a packaging box in which the end flap is assembled to the side flap. [Modes for carrying out the invention]

[0012] Embodiments of the present invention will be described in detail with reference to the drawings as appropriate. In the following description, the front-back, left-right directions are set for convenience in explaining the packaging box of the present embodiment, and do not limit the configuration and usage state of the packaging box of the present invention.

[0013] As shown in FIG. 1, the packaging box 1 of the present embodiment includes a cylindrical body portion 10, a bottom portion 20 provided at the lower opening of the body portion 10, and a top portion 30 provided at the upper opening of the body portion 10.

[0014] As shown in FIG. 2, the packaging box 1 of the present embodiment is formed by mountain-folding or valley-folding a blank sheet S cut out from a cardboard sheet at each fold line. The blank sheet S shown in FIG. 2 is arranged so that the inner surface side is visible.

[0015] The fold lines of the blank sheet S are ruled lines (pressed ruled lines) formed by linearly pressing the surface of the blank sheet S. Note that intermittent cuts may be formed in the ruled lines. This makes it easier to fold the blank sheet S at the fold lines. Alternatively, the fold lines may be formed by intermittently and linearly forming half-cut cuts that only cut the surface of the sheet or cuts that penetrate the sheet.

[0016] As shown in FIG. 1, the body portion 10 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. The end walls 11 and the side walls 12 are formed in a rectangular shape in a side view. Openings in a rectangular shape are formed on the upper and lower surfaces of the body portion 10 in a plan view.

[0017] The bottom portion 20 has a pair of front and rear inner flaps 21, 21 respectively connected to the lower edge portions of the front and rear end walls 11, 11, and a pair of left and right outer flaps 22, 22 respectively connected to the lower edge portions of the left and right side walls 12, 12. The bottom portion 20 closes the lower opening of the body portion 10 by overlapping the two outer flaps 22, 22 on the lower surfaces of the two inner flaps 21, 21 and abutting the leading edge portions of the two outer flaps 22, 22 against each other.

[0018] The top portion 30 includes front and rear end flaps 40, 40 respectively connected to the upper edges of the front and rear end walls 11, 11, and left and right side flaps 50, 50 respectively connected to the upper edges of the left and right side walls 12, 12.

[0019] As shown in FIG. 5, the side flap 50 is connected to the upper edge of the side wall 12 via a fold line. The side flap 50 is formed to fit within a rectangle having the upper edge of the side wall 12 as the long side. The side flap 50 covers the left or right region of the upper opening of the body portion 10 and is bent perpendicular to the side wall 12.

[0020] The leading edge of the left side flap 50 (the edge on the central side in the left - right direction of the body portion 10) and the leading edge of the right side flap 50 (the edge on the central side in the left - right direction of the body portion 10) are arranged at an interval in the left - right direction.

[0021] A front insertion port 51 is opened in the front portion of the side flap 50. The front insertion port 51 extends in the left - right direction and also extends rearward from the inner end in the left - right direction. The front insertion port 51 is bent at a right angle. In the state of the blank sheet S (see FIG. 2), the insertion port 51 is blocked by a lid piece 52. The lid piece 52 is connected to the inner edge in the left - right direction of the insertion port 51.

[0022] A rear insertion port 51 is opened in the rear portion of the side flap 50. The rear insertion port 51 is formed symmetrically with the front insertion port 51 in the front - rear direction. A lid piece 52 is also provided in the rear insertion port 51 in the same manner as in the front insertion port 51.

[0023] In the packaging box 1 of the present embodiment, two front insertion ports 51, 51 that are symmetric about the left - right direction are formed in the front portion of the top portion 30, and two rear insertion ports 51, 51 that are symmetric about the left - right direction are formed in the rear portion of the top portion 30.

[0024] The front and rear of the leading edge of the side flap 50 have front and rear recesses 53, 53 that are recessed outward in the left-right direction. The front recesses 53, 53 of the left and right side flaps 50, 50 are formed symmetrically and are facing each other in the left-right direction. Similarly, the rear recesses 53, 53 of the left and right side flaps 50, 50 are formed symmetrically and are facing each other in the left-right direction.

[0025] As shown in Figure 3, the front end flap 40 is connected to the upper edge of the front end wall 11 via a folded line. The front end flap 40 is formed in a roughly rectangular shape (a shape that fits within a rectangle with the upper edge of the end wall 11 as the longer side) (see Figure 5). The front end flap 40 is bent perpendicularly inward relative to the end wall 11 and overlaps the upper front surface of the side flaps 50, 50.

[0026] The front end flap 40 has left and right insertion portions 41, 41 formed at the left and right corners of its tip. The left insertion part 41 is inserted from the outside into the insertion opening 51 of the left side flap 50, and the right insertion part 41 is inserted from the outside into the front insertion opening 51 of the right side flap 50, thereby connecting the front end flap 40 to the front of both side flaps 50, 50.

[0027] At the tip edge of the end flap 40, an engagement recess 42 is formed between the left insertion portion 41 and the central portion, and an engagement recess 42 is also formed between the right insertion portion 41 and the central portion (see Figure 5).

[0028] A front handhold hole 43 is formed in the front end flap 40. The handhold hole 43 opens in the center of the end flap 40 in the left-right direction. In this embodiment, the handhold hole 43 is an oval-shaped through hole that extends in the left-right direction. In the blank sheet S (see Figure 2), the handholds 43 are covered by the cover plate 44. The cover plate 44 is connected to the rear edge of the front handholds 43 (the central edge of the body 10 in the front-to-back direction) via a fold line.

[0029] The left and right ends of the handhold hole 43 overlap with the recessed portions 53, 53 of the side flaps 50, 50, respectively. In this way, the left and right ends of the handhold hole 43 of the end flap 40 and the left and right recessed portions 53, 53 of the side flaps 50, 50 are in vertical communication.

[0030] As shown in Figure 4, the front-to-back positions of the hand grip hole 43 and the recessed portion 53 are set such that the front edge of the front hand grip hole 43 (the edge opposite the center in the front-to-back direction of the body portion 10) and the front edge of the front recessed portion 53 of the side flap 50 substantially overlap.

[0031] As shown in Figure 3, a bent line L1 extending in the left-right direction is formed on the front end flap 40. The bent line L1 is a straight line formed on the lower surface (inner surface) of the end flap 40 (see Figure 2). The bent line L1 is formed parallel to the base edge of the end flap 40 (the upper edge of the end wall 11). In this embodiment, the bent line L1 is formed on both the left and right sides of the front edge of the hand grip hole 43.

[0032] As shown in Figure 1, the rear end flap 40 is connected to the upper edge of the rear end wall 11 via a broken line and overlaps the upper rear surfaces of the side flaps 50, 50. The rear end flap 40 is formed symmetrically to the front end flap 40.

[0033] The rear end flap 40, like the front end flap 40, has left and right insertion parts 41, 41 that are inserted into the insertion openings 51, 51 of the side flaps 50, 50, and the left and right ends of the hand grip holes 43 overlap the recessed parts 53, 53 of the side flaps 50, 50.

[0034] Next, the procedure for assembling the top portion 30 of the packaging box 1 will be described. After forming the body portion 10, as shown in Figure 5, the side flaps 50 are folded inward relative to the side wall 12 and positioned inside the upper opening of the body portion 10. Next, as shown in Figure 6, the end flap 40 is folded inward relative to the end wall 11 and the end flap 40 is folded along the fold line L1 so that it forms a mountain fold when viewed from the outside. In this way, the leading edge of the end flap 40 is positioned closer to the end wall 11 than the insertion openings 51, 51 of the side flaps 50, 50.

[0035] As the folded end flap 40 is straightened out, the insertion portion 41 of the end flap 40 is inserted into the insertion opening 51 of the side flap 50, as shown in Figure 1. As a result, the insertion portion 41 of the end flap 40 enters the underside of the side flap 50, and the insertion portion 41 is locked to the underside of the side flap 50. In addition, the engagement recess 42 of the end flap 40 and the edge of the insertion opening 51 of the side flap 50 become interlocked. The tip of the front end flap 40 is located on the rear side (center side in the front-to-back direction) of the front recesses 53, 53, and the tip of the rear end flap 40 is located on the front side (center side in the front-to-back direction) of the rear recesses 53, 53. As a result, the end flap 40 is connected to the side flaps 50, 50, forming the top portion 30.

[0036] When moving the packaging box 1 of this embodiment, one can grasp one of the front or rear ends of the top 30 and lift it, or pull it sideways. Since the packaging box 1 of this embodiment has a front-to-rear symmetrical shape, the following description will use the case of grasping the front of the top 30 of the packaging box 1 and lifting it as an example.

[0037] When moving the packaging box 1 of this embodiment, as shown in Figure 4, insert your hand from above into the handle hole 43 of the end flap 40 and place your hand on the front edge (outer edge in the front-to-back direction) of the handle hole 43. In the packaging box 1 of this embodiment, when the handle hole 43 is opened, the lid plate 44 bends toward the rear (inward in the front-to-back direction) relative to the handle hole 43. As a result, it becomes difficult to place a hand on the rear edge of the handle hole 43, so when moving the packaging box 1, the hand is placed on the front edge of the handle hole 43.

[0038] When a hand is inserted into the handle hole 43 of the end flap 40, a hand can also be inserted into the recess 53 of the side flap 50. Then, by placing hands on the front edge of the handle hole 43 of the end flap 40 and the front edge of the recess 53 of the side flap 50 and pulling up the top 30, the packaging box 1 can be moved.

[0039] In the packaging box 1 described above, as shown in Figure 4, when a hand is inserted into the handle hole 43 of the end flap 40, the hand is placed on both the end flap 40 and the side flap 50. This allows the side flap 50 to be pulled along with the end flap 40 when the packaging box 1 is moved, preventing the end flap 40 from coming off the side flap 50 and preventing the top 30 from opening.

[0040] Furthermore, in the packaging box 1 of this embodiment, as shown in Figure 6, when inserting the insertion portion 41 of the end flap 40 into the insertion opening 51 of the side flap 50, the end flap 40 is folded in a mountain fold along the fold line L1. Then, by straightening the end flap 40, the insertion portion 41 can be easily inserted into the insertion opening 51 at a shallow insertion angle.

[0041] Furthermore, since the engagement recess 42 of the end flap 40 and the edge of the insertion opening 51 of the side flap 50 are engaged, the end flap 40 becomes less likely to come off the side flaps 50, 50.

[0042] Furthermore, in the packaging box 1 of this embodiment, when opening the top 30, the end flap 40 is folded in a mountain fold along the fold line L1, making it easier to remove the insertion portion 41 of the end flap 40 from the insertion opening 51 of the side flap 50. Thus, in the packaging box 1 of this embodiment, the top 30 is prevented from opening when the box is moved, while the top 30 is easy to open when opening the box.

[0043] Although embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above, and can be modified as appropriate without departing from its spirit. In the packaging box 1 of this embodiment, as shown in Figure 1, handle holes 43, 43 and recessed portions 53 are formed on both the front and rear of the top portion 30, but the handle holes 43 and recessed portions 53 may be formed on only one of the front or rear of the top portion 30.

[0044] In the packaging box 1 of this embodiment, as shown in Figure 5, the leading edges of the left and right side flaps 50, 50 are spaced apart in the left-right direction, but the leading edges of the side flaps 50, 50 may be brought together. In this case, the recessed portions 53, 53 of the side flaps 50, 50 are connected to form a single opening. The entire handle hole 43 of the end flap 40 then overlaps with the left and right recessed portions 53, 53.

[0045] In the packaging box 1 of this embodiment, as shown in Figure 1, the left and right ends of the handle hole 43 overlap with the left and right recesses 53, 53, respectively. However, the box may be configured so that one of the left or right ends of the handle hole 43 overlaps with one of the left or right recesses 53.

[0046] In the packaging box 1 of this embodiment, the left and right insertion portions 41, 41 formed on the end flap 40 are inserted into the insertion openings 51, 51 formed on the left and right side flaps 50, 50, but the shape and number of the insertion portions 41 and insertion openings 51 are not limited.

[0047] Although the packaging box 1 in this embodiment is made of corrugated cardboard, the packaging box 1 can also be formed from various known types of paperboard. [Explanation of symbols]

[0048] 1 packaging box 10 Torso 11 End wall 12 Side wall 20 bottom 21 Inner flap 22 Outer flap 30 Top 40 End flaps 41 Insertion part 42 Engagement recess 43 Handhold holes 44 Lid plate 50 Side flaps 51 outlets 52 Lid piece 53 Recessed area L1 is a broken line graph. S Blank Sheet

Claims

1. A cylindrical body having front and rear end walls and left and right side walls, The bottom portion provided at the lower opening of the body, The torso comprises a top portion provided at the upper opening of the torso, The aforementioned top is, An end flap connected to the end wall, It comprises left and right side flaps connected to the left and right side walls, respectively, The end flap is superimposed on the outer surface of the side flaps, The insertion portion formed on the end flap is inserted into the insertion opening formed on the side flap. A handhold hole is formed in the end flap, A recess is formed at the leading edge of the side flap. A packaging box characterized in that the left and right ends of the handle holes of the end flaps overlap the recessed portions of the side flaps.

2. A packaging box according to claim 1, A packaging box characterized in that the end flaps have fold lines that extend in the left-right direction.

3. A packaging box according to claim 1, The insertion portion is formed at the left-right corner of the tip of the end flap. A packaging box characterized in that an engagement recess is formed between the insertion portion and the central part of the leading edge of the end flap.

Images