JP2000203562A - Packaging box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging box excellent in shock absorbing property, which can easily be assembled, and in which goods can easily be inserted. SOLUTION: There is provided a packaging box in which each of a bottom wall flap 4 and a side bottom flap 5 are cooperatively arranged at each of the lower end edges of a pair of side walls 1 and the end walls 2. The bottom wall flap 4 is folded back to form a double-bottom wall 34 and at the same time the bottom wall 34 and the side bottom flap 5 are engaged to each other, the side bottom flap 5 is folded back to form a bottom end shock-absorbing frame 35. As the side bottom flap 5 is folded, the bottom wall 34 is received by a protrusion piece projected inwardly and the folded-back portion of the bottom wall flap 4 is engaged with a punched-out hole 33 of the protrusion piece. In addition, the extended segment of the bottom wall flap 4 is wound to form a bottom side shock-absorbing frame 36. Under a state in which no load is applied to the inner bottom plate 10 forming the upper surface of the bottom wall 34, the outer end part of the inner bottom plate 10 is caused to lift up by a repelling force at each of the bent portions of the bottom wall flap 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugated cardboard packing box used for packing articles such as electric appliances and precision equipment, which has a buffer frame.

[0002]

2. Description of the Related Art Conventionally, a packing box described in Japanese Patent Application Laid-Open No. 10-218163 is known. As shown in FIG. 11, the packing box includes a pair of side walls 50 and end walls 5.
The bottom wall flaps 52 and the side bottom flaps 53 connected to the lower end edges of the first and second side walls are folded and engaged with each other to form a double bottom wall 54 and a bottom end buffer frame 55, and a bottom end buffer frame. 55, a step 56 is provided, and an inner piece 57 is erected from the outer edge of the bottom wall 54, and a product 59 is inserted into a product storage recess 58 surrounded by the opposing step 56 and the inner piece 57. It is.

[0003]

The above-mentioned packing box has a problem that it is difficult to assemble the side bottom flap 53 while holding both the bottom wall flaps 52 at the time of assembly.

Further, since the bottom end buffer frame 55 and the inner piece 57 stand upright around the product storage recess 58, the product 59
There is also a problem that it is difficult to insert.

Further, there is no cushioning material having a frame structure inside the side wall 50, so that there is a problem that the cushioning property is not sufficient.

Therefore, the present invention is easy to assemble,
It is an object of the present invention to provide a packaging box in which a product can be easily inserted and the cushioning property is excellent.

[0007]

In order to solve the above-mentioned problems, the present invention has a bottom wall flap and a side bottom flap connected to a lower end edge of each of a pair of side walls and an end wall, respectively. The outer bottom plate, the folding plate, and the inner bottom plate which are sequentially arranged from the end side are turned up to form a double bottom wall, and this bottom wall and the side bottom flap are engaged with each other, and the base bottom side is attached to the side bottom flap. In a packing box in which a side bottom plate, a bottom inner end plate, and a bottom end top plate which are sequentially arranged are bent together to form a bottom end buffer frame, the side bottom flap is cut from the side bottom plate toward the bottom inner end plate. Forming a protruding piece at the center of the tip edge of the side bottom plate, and bending the side bottom flap,
The projecting piece protrudes inward from the bottom inner end plate, the outer bottom plate is placed thereon, and the bent portion of the bottom wall flap is engaged with the extraction hole of the projecting piece.

In this packing box, when the bottom wall flap and the side bottom flap which have been folded up beforehand are raised, the outer bottom plate is received by the protruding piece, and the folded portion of the bottom wall flap is engaged with the extraction hole of the protruding piece. Since the folded state is maintained, the bottom wall flap can be easily assembled without manually supporting the bottom wall flap.

Further, when the bottom wall flap is provided with a bottom inner plate, a bottom top plate and a bottom contact plate which are successively connected from the leading edge of the inner bottom plate, and these are bent together to form a bottom side buffer frame, Is surrounded by the buffer frame, so that the buffering property is improved.

Further, when no load is applied to the inner bottom plate, the repulsive force of each bent portion of the bottom wall flap causes the outer end portion of the inner bottom plate to float, so that when the product is inserted, Since the bottom inner plate falls outward and the top of the product storage space opens widely, it is possible to place the product on the inner bottom plate while holding the product by hand, and then, even if you release your hand from the product, the product will remain on the inner bottom plate Since it is supported, no drop impact acts on the product.

[0011]

FIG. 1 shows a blank of a packing box according to the present invention. As shown in the figure, in this blank, a pair of side walls 1 and end walls 2 are alternately connected to each other, and a margin allowance piece 3 is connected to an outer edge of one of the side walls 1. A bottom wall flap 4 is connected to a lower edge of the side wall 1, and a side bottom flap 5 is connected to a lower edge of the end wall 2. A cover plate 6 is provided at an upper edge of the side wall 1, and a top plate is provided at an upper edge of the end wall 2. Are provided with lid flaps 7 in series.

The bottom wall flap 4 has an outer bottom plate 8, a folding plate 9
And an inner bottom plate 10 are sequentially arranged from the base end side, and further, a bottom inner plate 11, a bottom top plate 12, and a bottom contact plate 13 are sequentially arranged from the distal end edge of the inner bottom plate 10. A side bottom plate 14, a bottom inner end plate 15, a bottom end top plate 16 and a bottom end contact plate 17 are sequentially arranged on the side bottom flap 5 from the base end side. The inner end plate 19, the upper end back plate 20, and the upper end contact plate 21 are sequentially arranged from the base end side.

In the bottom wall flap 4, on both side edges, an engagement piece 22 protruding from the outer bottom plate 8 and a projecting piece 23 protruding from the base of the folding plate 9 and the inner bottom plate 10 are provided. A pair of abutting pieces 24 cut from the bottom inner plate 11 and leg pieces 25 cut from the bottom inner plate 11 are provided at the distal end of the bottom plate 10. In the side bottom flap 5, a bottom inner end plate 15
The protrusion 26 is formed by cutting inward.

An insertion piece 27 is continuously provided at the front edge of the cover plate 6, and a pair of cuts 28 are formed at the front edge of the insertion piece 27. In the lid flap 7, an insertion hole 29 is provided at the center of the ridge between the lid receiving plate 18 and the upper inner end plate 19, and a pair of cuts 30 extending over the upper inner end plate 19 and the upper end back plate 20. A portion surrounded by a fold 31 connecting both ends is a pushing portion 32.

As shown in FIG. 2, the packing box is delivered and stored in a state where the bottom wall flap 4 and the side bottom flap 5 are folded up and folded flat.

In use, as shown in FIG.
Each pair of side walls 1 and end wall 2 is developed into a rectangular tube shape. At this time, the projecting piece 26 is rebounded by the base end fold and the bottom inner end plate 15
, And protrudes inwardly, and an extraction hole 33 is formed at the mark.

From this state, when the outer bottom plate 8, the folding plate 9 and the inner bottom plate 10 are folded back while raising the bottom wall flap 4,
As shown in FIG. 4, the engagement piece 22 is placed on the protruding piece 26 to form a bottom wall 34, and as shown in FIG. 5, the engagement between the extraction hole 33 and the extension piece 23 Since the folded state of the bottom wall flap 4 is maintained, the assembling operation can be performed without holding the bottom wall flap 4 by hand.

Next, the bottom contact plate 13 is bent downward along the inner surface of the side wall 1, and further, the bottom end contact plate 17 is bent downward along the inner surface of the end wall 2, as shown in FIG. A bottom end buffer frame 35 is formed.

In the state where no load is applied to the inner bottom plate 10, the repulsive force of each bent portion of the bottom wall flap 4 causes
Since the outer end of the inner bottom plate 10 rises and the bottom inner plate 11 falls outward, the upper part of the product storage space opens widely. For this reason, when storing the product G as shown in FIG. 7, it is possible to place the product G on the inner bottom plate 10 while holding the product G by hand as shown in FIG.

As the product G descends, the inner bottom plate 10 sinks, and the bottom inner plate 11 rises to form the bottom buffer frame 36, as shown in FIG. At this time, product G
Even if the user releases his / her hand, the product G is supported by the inner bottom plate 10, so that the product G is not subjected to a drop impact. Also, with the standing of the bottom inner plate 11, the abutting piece 24 and the leg piece 2
5 protrude from each other and come into contact with the side wall 1 and the outer bottom plate 8 to secure a buffer space on the side and the bottom.

Thereafter, as shown in FIG.
And the pushing portion 32 is recessed so that the upper end buffer frame 37
Is formed, and the upper end corner of the product G is fitted into the pushing portion 32,
As shown in FIGS. 9 and 10, while closing the cover plate 6,
The insertion piece 27 is bent downward, and the notch 28 is inserted into the insertion hole 29 and sealed.

In this packed state, the bottom of the product G
Since each pair of the bottom end buffer frame 35 and the bottom side buffer frame 36 is surrounded, even if the packing box falls from a corner or a ridge, for example, the product G is held at a predetermined position in the box. And buffered.

[0023]

As described above, in the packing box according to the present invention, when the bottom wall flap and the side bottom flap which have been folded up beforehand are raised, the outer bottom plate is received by the protruding piece, and the folded portion of the bottom wall flap is formed. Since the folded state is maintained by engaging with the extraction hole of the projecting piece, the bottom wall flap can be easily assembled without manually supporting it.

Further, when the bottom wall flap is provided with a bottom inner plate, a bottom top plate and a bottom contact plate which are successively connected from the leading edge of the inner bottom plate, and these are bent mutually to form a bottom side buffer frame, Is surrounded by the buffer frame, so that the buffering property is improved.

Further, in a state where a load is not applied to the inner bottom plate, the outer end of the inner bottom plate is lifted by the repulsive force of each bent portion of the bottom wall flap. Since the bottom inner plate falls outward and the top of the product storage space opens widely, it is possible to place the product on the inner bottom plate while holding the product by hand, and then, even if you release your hand from the product, the product will remain on the inner bottom plate Since it is supported, no drop impact acts on the product. Therefore, the product can be easily inserted into the box.

[Brief description of the drawings]

FIG. 1 is a view showing a blank of a packing box according to the present invention.

FIG. 2 is a perspective view showing a folded state of the embodiment.

FIG. 3 is a perspective view from the bottom showing an assembling process of the same.

FIG. 4 is a bottom view of the above.

FIG. 5 is a perspective view showing an assembling process of the same.

FIG. 6 is a perspective view showing an assembling process of the same.

FIG. 7 is a perspective view showing a packing process of the above.

FIG. 8 is a vertical side view showing a packing process of the above.

FIG. 9 is a longitudinal side view showing the packing state of the above.

FIG. 10 is a vertical sectional front view showing the packing state of the above.

FIG. 11 is a perspective view of a conventional packing box.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Side wall 2 End wall 4 Bottom wall flap 5 Side bottom flap 6 Lid plate 7 Lid flap 8 Outer bottom plate 9 Folding plate 10 Inner bottom plate 11 Bottom inner plate 12 Bottom top plate 13 Bottom contact plate 14 Bottom inner plate 15 16 Bottom end top plate 17 Bottom end abutment plate 22 Engagement piece 23 Overhanging piece 26 Protrusion piece 34 Bottom wall 35 Bottom end buffer frame 36 Bottom side buffer frame 37 Upper end buffer frame G Product

Claims (3)

[Claims] 1. A bottom wall flap 4 and a side bottom flap 5 are respectively connected to lower end edges of each of a pair of side walls 1 and an end wall 2, and an outer bottom plate 8, which is sequentially arranged on the bottom wall flap 4 from a base end side,
The folding plate 9 and the inner bottom plate 10 are turned back to form a double bottom wall 34, and the bottom wall 34 and the side bottom flaps 5 are engaged with each other, and are sequentially arranged on the side bottom flaps 5 from the base end side. In the packing box in which the side bottom plate 14, the bottom inner end plate 15, and the bottom end top plate 16 are mutually bent to form the bottom end buffer frame 35, the side bottom flaps 5 are directed from the side bottom plate 14 to the bottom inner end plate 15. By cutting inward, a projecting piece 26 is formed at the center of the leading edge of the side bottom plate 14, and the projecting piece 26 projects inward from the bottom inner end plate 15 with the bending of the side bottom flap 5, A packing box, wherein the outer bottom plate (8) is placed on the projecting piece (26), and a bent portion of the bottom wall flap (4) is engaged with an extraction hole (33) of the projecting piece (26). 2. The bottom wall flap 4 is provided with a bottom inner plate 11, a bottom top plate 12, and a bottom contact plate 13 which are sequentially connected from the leading edge of the inner bottom plate 10, and these are bent together to form a bottom side buffer frame. 36. The packing box according to claim 1, wherein 36 is formed. 3. An outer end portion of the inner bottom plate 10 is lifted by a repulsive force of each bent portion of the bottom wall flap 4 when no load is applied to the inner bottom plate 10. The packaging box according to claim 2.