JPH0712250Y2 - Packaging box - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging box, and more particularly to a packaging box suitable for accommodating a circular three-dimensional object such as a coil copper tube or a ring-shaped fluorescent tube.

[0002]

2. Description of the Related Art As shown in FIGS. 7 and 8, when a cylindrical product, for example, a copper tube P wound in a coil shape is packaged in a corrugated cardboard box 1 having a square shape in plan view, it is transported. In many cases, the corner portions 2 of the four corners, which are hollow portions, sink into the interior and are deformed or damaged when loaded or loaded. In particular, when the packaged product is a relatively heavy product such as a coil copper pipe, the degree of deformation and damage is large. As a result, the upper and lower lid plate portions 3 and 4 are deformed at the corner portions 2, and when they are stacked in multiple stages, a load collapse phenomenon occurs. Therefore, there are various drawbacks that a large storage space is required and the cardboard box 1 cannot be recycled.

In order to eliminate such a conventional defect, conventionally, in the corner portions 2 of the four corners which are hollow portions, as shown in FIGS. 7 and 8, a right-angled triangular shape formed of corrugated cardboard is used. The cylindrical reinforcing member 5 of FIG. 2 is inserted after the stored product P is stored, or it is preliminarily formed on two surfaces 5A, 5A orthogonal to each other.
Then, the corner portions 2 were reinforced by being adhered and fixed to the inner side surfaces 2A of the even corner portions 2, respectively.

[0004]

However, in the conventional packaging box as described above, the cardboard box 1 and the tubular reinforcing member 5 are formed as separate bodies. The number of materials and manufacturing processes for manufacturing the member 5 is increased, and (2) assembly by bending the tubular reinforcing member 5 and attachment work for mounting the same on the cardboard box 1 are required, (3) tubular Since the reinforcing member 5 is a rectangular tubular body whose upper and lower surfaces are opened, the reinforcing member 5 has high strength against vertical load, but is structurally weak against horizontal load. Therefore, when a horizontal load is applied to the corner portion 2 from the outside, the corner portion 2 of the corrugated cardboard box 1 is deformed by being sunk inside and deformed or damaged. Various problems such as being done have not been completely solved.

[0005]

[Means for Solving the Problems] The present invention has been made to solve the above-mentioned conventional problems, and a reinforcing block having a high structural strength is provided at a corner of the box body. The purpose of the present invention is to provide one that can be simultaneously formed when assembling the box main body, and the gist thereof is the peripheral edge of one of the opposite sides of the rectangular cylindrical body portion for accommodating the circular three-dimensional object. In addition, when a reinforcing member forming plate that constitutes a reinforcing block of a triangular tube composed of an upper plate part, a side plate part and a lower plate part is foldably connected to a corner part of the rectangular tubular part, the other side In the packaging box, a pair of upper lid plates are foldably connected to the periphery of the opening, and a lower lid plate is foldably connected to the periphery of the lower opening of the rectangular tubular portion. .

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in FIGS. 1 is a perspective view of a packaging box before assembly according to the present invention and a cylindrical body housed in the box, FIG. 2 is a perspective view of the packaging box during the first assembly, and FIG. FIG. 4 is a perspective view of the packaging box during the second assembling, and FIG.
5 is a perspective view during assembly, FIG. 5 is a perspective view of the packaging box when assembly is completed, and FIG. 6 is a sectional view taken along line II-II of FIG.

In the figure, reference numeral 1 is a box body formed of a hard plate such as corrugated cardboard, and its rectangular cylindrical body portion 2 can accommodate, for example, a circular three-dimensional object 3 in which a copper tube is wound in a cylindrical shape. It is formed into a cylindrical body having a square shape in plan view by four continuous side plates 2A, the inner diameter of which is set to be slightly larger than the outer diameter of the circular three-dimensional object 3, and the height thereof is substantially the same as the height of the circular three-dimensional object 3. Has been formed.

Reference numeral 4 is a fold line, and a reinforcing member forming plate 5 is connected through the fold line 4 formed at one of the upper edges of the upper opening of the rectangular tubular portion 2 facing each other, and the other is opposed to the other. The upper lid plate 6 that closes the upper opening is continuous to the upper edge of the upper edge through a fold line 7. The heights of the reinforcing member forming plate 5 and the upper cover plate 6 are both set to ½ of the lateral width of the rectangular tubular portion 2. Further, when the pair of upper lid plates 6 are bent inwardly and their free ends are attached to each other, the upper opening of the rectangular tubular portion 2 can be completely closed.

Reference numeral 8 denotes a reinforcing block which is formed by bending the reinforcing member forming plate 5 into left and right parts so that the center of the reinforcing member forming plate 5 which bisects the lateral width is line-symmetrical. That is, a cut line 9 that is perpendicular to a horizontal line AA that divides the vertical width of the reinforcing member forming plate 5 into two is provided in the center that divides the lateral width of the reinforcing member forming plate 5 into two. Further, in the left and right side edges 5a of the reinforcing member forming plate 5, an upper part from the horizontal line AA is formed as an inclined surface 10, and the inclined surface 10 is a vertical cut at the upper edge 5b of the reinforcing member forming plate 5. It is formed by a slanted line connecting a position a having the same length as the vertical cut line 9 in the left-right direction from the line 9 and an intersection b of the side edge 5a of the reinforcing member forming plate 5 and the horizontal line AA. The length of the inclined surface 10 is the same as the height of the rectangular tubular portion 2.

Reference numeral 11 denotes an oblique cut line, which is formed in parallel with the inclined surface 10 in the left-right direction from the lower end of the vertical cut line 9 to the fold line 4. Therefore, in the lower central part of the reinforcing member forming plate 5, the vertical cut line 9 and the oblique cut line 1 are formed.
1, the auxiliary piece 12 of an isosceles triangle whose base is the fold line 4 is formed in a state of being connected to the rectangular tubular portion 2. Further, between the lower end of the oblique cut line 11 and the lower end b of the inclined surface 10 and between the lower end of the vertical cut line 9 and the upper end a of the inclined surface 10, there are a lower fold line 14 and an upper part, respectively. The fold line 13 is formed in parallel.

Then, the inclined surface 10 and the oblique cut line 11
The lower fold line 13 and the upper fold line 14 form a rectangular side plate portion 15, and the side edge 5 of the reinforcing member forming plate 5 is formed.
The triangle-shaped upper plate portion 16 is formed by a, the fold line 4, and the upper fold line 14, and the vertical cut line 9 and the block forming plate 5 are formed.
At the upper edge 5b, a triangular lower plate portion 17 is formed by the line segment from the vertical cut line 9 to the position a of the same length and the lower fold line 13. Thus, the reinforcing block 8
Is composed of the side plate portion 15, the upper plate portion 16 and the lower plate portion 17.

On the other hand, a pair of lower lid plates 19 are connected to the upper edges of the lower openings of the rectangular tubular portion 2 facing each other through fold lines 18, respectively. It is congruent with the upper cover plate 6.

Therefore, first, the lower cover plate 19 is provided with a fold line 18
Thus, the bottom plate portions are formed by bending them inwardly to close the lower opening of the rectangular tubular portion 2. On the other hand, as shown in FIG. 2, the reinforcing member forming plate 5 is divided into right and left by the vertical cut line 9 and the oblique cutting line 11, and each reinforcing member forming plate 5 is divided by the crease line 4 into the rectangular tubular portion 2. After being bent horizontally toward the inner side of the side plate 1, as shown in FIG.
5 and the lower plate portion 17 are bent at right angles in the downward direction.

Further, by bending the lower plate 17 inward at a right angle by the lower fold line 13, the left and right side edges of the side plate portion 15 and the oblique sides of the lower plate portion 17 which are adjacent to each other are orthogonal to each other, as shown in FIG. When the lower plate portion 17 is affixed to the lower cover plate 19 of the rectangular tubular body portion 2 in this state, the side plate 2A of the orthogonal rectangular tubular body portion 2 is abutted.
By the side plate portion 15 and the side plate portion 15, the reinforcing block 8 of a triangular cylinder whose upper and lower sides are closed by the upper plate portion 16 and the lower plate portion 17 is formed at the corner portion.

After the reinforcing blocks 8 are respectively formed in the corners of the rectangular tubular body 2 as described above, a circular three-dimensional object is formed in the rectangular tubular body 2 as shown in FIGS. 4 and 5. 3, the auxiliary pieces 12 of the isosceles triangle are bent inward by the fold line 4, and then the upper lid plates 6 are bent inward by the fold line 7 to form an upper portion of the rectangular tubular portion 2. The opening is completely closed. In addition, although the rectangular cylindrical body portion 2 of the above-described embodiment has a square shape in a plan view, an elliptic circular solid object 3 is formed.
A rectangular shape may be used to store the.

[0016]

As described above, the packaging box according to the present invention has a rectangular cylindrical body portion for accommodating a circular three-dimensional object in the peripheral edge of one of the opening portions facing each other, and in the corner portion of the rectangular cylindrical body portion. When the reinforcing member forming plates that form the reinforcing block of the triangular tube composed of the upper plate portion, the side plate portion, and the lower plate portion are flexibly connected, the pair of upper lid plates is provided around the other opening edge. Since the lower cover plate is foldably connected and the lower cover plate is foldably connected to the peripheral edge of the lower opening of the rectangular cylindrical body, the reinforcing block of the triangular cylinder is formed by bending the reinforcing member forming plate. Since its upper and lower surfaces are reinforced by being closed by the upper plate portion and the lower plate portion,
The structural strength against the horizontal load at the corner of the box body is significantly improved. Therefore, there is almost no damage to the corners during transportation or stacking, the load collapse phenomenon does not occur even when they are stacked in multiple stages, the storage space is small, and the cardboard boxes can be recycled. Also,
The reinforcing block can be configured by bending the block forming plate when assembling the box body, so that the work process can be omitted and the packing efficiency can be improved, and the material can be saved and reused. There are various effects such as.

[Brief description of drawings]

FIG. 1 is a perspective view of a packaging box before assembly according to the present invention and a cylindrical body housed in the box.

FIG. 2 is a perspective view of the packaging box during the first assembly.

FIG. 3 is a perspective view of the packaging box during the second assembly.

FIG. 4 is a perspective view of the packaging box during the third assembling.

FIG. 5 is a perspective view of the packaging box when assembly is completed.

6 is a sectional view taken along line II-II of FIG.

FIG. 7 is a perspective view of a conventional packaging box before assembly and a cylindrical body housed in the box.

FIG. 8 is a perspective view of the packaging box when assembly is completed.

[Explanation of symbols]

 1 Box Main Body 2 Rectangular Cylindrical Body Part 2A Side Plate 3 Circular Solid Object 4 Fold Line 5 Reinforcement Member Forming Plate 5a Side Edge 5b Upper Edge 6 Upper Lid Plate 7 Fold Line 8 Reinforcing Block 9 Vertical Cut Line 10 Inclined Surface 11 Diagonal Cut line 12 Auxiliary piece 13 Lower fold line 14 Upper fold line 15 Side plate part 16 Upper plate part 17 Lower plate part 19 Lower lid plate

Claims (1)

[Scope of utility model registration request] 1. A triangle having an upper plate portion, a side plate portion, and a lower plate portion at a corner portion of the rectangular tubular body portion on the peripheral edge of one of the opposing openings of the rectangular tubular body portion for accommodating a circular three-dimensional object. When the reinforcing member forming plate that constitutes the reinforcing block of the cylinder is foldably connected, the pair of upper lid plates are foldably connected to the peripheral edge of the other opening, and the lower part of the rectangular cylinder portion is connected. A packaging box characterized in that a lower cover plate is foldably connected to the periphery of the opening.