JPH0223529Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a cardboard packaging box used for packaging capacitors, etc., for example.

BACKGROUND ART Conventionally, this type of cardboard packaging box has a rectangular bottom portion 22, as shown in FIGS. 3 and 4, for example.
and side portions 23, 24, 25, and 26 that are connected to the front and rear and left and right side edges, respectively.
The parallel troughs 32 of the flutes of the corrugated core base paper 31 on the left and right side surfaces 25 and 26 on the opposite short sides are aligned with the parallel troughs 32 of the corrugated core base paper 31 on the bottom surface part 22. It was considered parallel.

Problems that the invention attempts to solve However, such conventional cardboard 30
In the packaging box 21 made of
26 has very low strength. Therefore, when the packaging boxes 21 are stacked after packaging items such as capacitors, the left and right side parts 25 and 26 will bend due to pressure from above, and this will prevent the contents from being sufficiently absorbed. The problem was that it could not be protected.

Conventionally, the box body and the lid are made separately, and short side extensions are provided at both ends of the short sides of the box body. It is known that the extension portions are each bent outward and pasted on the outer surface of the side surface portion on the long side (see, for example, Utility Model Application Publication No. 32170 of 1923).

However, in such conventional cardboard boxes, although it is possible to reinforce the long sides, the side extensions are very short.
The reinforcing effect was not sufficient, and since the short side extensions were attached to the outer surface of the long sides, the side extensions were visible from the outside at the four corners of the cardboard box, resulting in an unsightly appearance. It was hot. In addition, in this conventional cardboard box, the lid is made separately from the box body, so the side parts of the box body and the side parts of the lid overlap, which requires a large amount of material. There was a problem that manufacturing costs were extremely high.

The purpose of this invention is to solve the above problems and to significantly increase the strength of the short side side portion having parallel troughs parallel to the parallel troughs of the corrugated core base paper at the bottom. As a result, when the packaging boxes are stacked, it is possible to effectively prevent the side parts from bending due to pressure from above, and it is possible to reliably protect the packaged items such as capacitors. In addition, it has a good appearance, requires less material, and is very inexpensive to manufacture.
We are trying to provide cardboard packaging boxes.

Means for Solving the Problems In order to achieve the above object, this invention has a rectangular bottom part, a long side side part and a short side side part which are connected to the front and rear, left and right side edges of the rectangular bottom part, respectively. , in a cardboard packaging box that includes a pair of lid parts that are connected to the side parts on the long sides, and a pair of folding attachment parts that are connected to the side parts of the short sides and are folded into the lower side of the lid part, the short sides facing each other are The parallel troughs of the corrugated core base paper on the side surface of the side are parallel to the parallel troughs of the corrugated core base paper of the bottom surface, and side extensions are provided at each end of the side surface of the short side. The gist is a cardboard packaging box in which these side extensions are folded back inward and affixed to the inner surface of the sidewalls with their tips abutting each other.

Embodiment Next, an embodiment of this invention will be described based on the drawings.

In this specification, front and back and left and right are based on FIG. 1, and the front refers to the upper side of FIG. 1, the rear refers to the lower side, and the left refers to the left side of the same figure, and the right refers to the right side of the same figure. shall be said.

In FIGS. 1 and 2 showing an embodiment of this invention, a cardboard packaging box 1 according to this invention has a rectangular bottom part 2, and side parts 3 on the long sides that are continuous to the front, back, right and left edges of the bottom part 2, respectively. , 4 and side surfaces 5, 6 on the short side; a pair of lids 7, 7 that are connected to the side surfaces 3, 4 on the long side; The entire packaging box 1 is integrally made of corrugated cardboard 10.

The corrugated board 10 is made by pasting liner base papers 13 on both sides of a core base paper 11 having corrugated flutes. Although the illustrated cardboard 10 is a double-sided cardboard, it may of course be a single-sided cardboard.

Then, the parallel troughs 12 of the flutes of the corrugated core base paper 11 on the left and right side surfaces 5 and 6 on the opposite short sides are connected to the parallel troughs 12 of the corrugated core base paper 11 on the bottom surface part 2. Side extension portions 15, 15, 16, which are parallel to the left and right side portions 5, 6 and have a length approximately half of the length of the side portions 5, 6, are provided at both front and rear ends of the left and right side portions 5, 6, respectively. 16 are provided respectively, and these side extensions 15, 15, 16, 16
is folded inward and on the inner surface of the side parts 5 and 6,
They are attached with their tips butted against each other.

Therefore, the left and right side surfaces 5, 6 on the short sides are overlapped with the side extensions 15, 15, 16, 16 to form a complete double wall, and the side surfaces on the short sides At both ends of the section there are folds of the lateral extensions, thus significantly increasing its strength. Therefore, even if items such as capacitors (not shown) are packed in the packaging box 1 and then stacked, the left and right sidewalls 5 and 6 on the short sides will not bend.

In the above embodiment, the side extensions 15, 15, 16, 16 of the packaging box 1 have the same length, which is approximately half of the length of the left and right side sections 5, 6 on the short sides. However, these side extensions 1
The lengths of 5, 15, 16, and 16 may be different from each other.

Effects of the invention As mentioned above, this invention has a rectangular bottom part, a long side side part and a short side side part that are connected to the front and rear, left and right side edges of the rectangular bottom part, and a long side side part. In a corrugated cardboard packaging box that includes a pair of consecutive lids and a pair of fold-in attachment parts that are connected to the short side sidewalls and folded into the bottom of the lid, the waveforms of the short sidewalls facing each other are The parallel troughs of the core base paper are parallel to the parallel troughs of the corrugated core base paper on the bottom surface, and side extensions are provided at each end of the side surface on the short side, and these side surfaces Since the extensions are folded inward and pasted onto the inner surface of the side surface with their tips abutting each other, the side surface on the short side, which is originally weak, is completely double-sided. In addition to forming a wall, since the folded portions of the side surface extension portions are present at both ends of the side surface portion on the short side, the strength of the side surface portion on the short side can be significantly increased. Therefore, according to this invention, when packaging boxes are stacked, it is possible to effectively prevent the short sides from bending due to pressure from above, thereby reliably protecting the packaged items such as capacitors. I can do things.

Moreover, according to this invention, the side extensions provided at both ends of the sidewalls on each short side are folded back inward and pasted on the inner surface of the sidewalls, so the sidewall extensions are attached to the inner surface of the box. It does not appear on the outside at all,
Therefore, it is very clean and has a good appearance.

Furthermore, in this invention, a pair of lids are provided so as to be connected to the long sides, and the lid is provided integrally with the packaging box, so the box body and lid in the cited example are separated. This has the effect of requiring less material and significantly lower manufacturing costs than the type of cardboard box made.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway developed plan view of a packaging box showing an embodiment of this invention, Fig. 2 is a partially cutaway perspective view of the packaging box, and Fig. 3 is a partially cutaway developed plan view of a conventional packaging box. FIG. 4 is a cutaway perspective view of the same portion. 1...Cardboard packaging box, 2...Bottom part, 3,
4, 5, 6... Side part, 10... Cardboard, 11
... Corrugated core base paper, 12 ... Parallel valleys, 15,
16...Side extension.

Claims (1)

[Scope of utility model registration request] A rectangular bottom part 2, long side side parts 3, 4, short side side parts 5, 6, and long side side parts 3, 4, which are connected to the front, rear, left and right side edges of the rectangular bottom part 2, respectively.
In a cardboard packaging box comprising a pair of lid parts 7, 7 that are connected to each other, and a pair of folded and attached parts 8, 8 that are connected to side parts 5, 6 on the short side and folded into the lower side of the lid parts 7, 7. , parallel troughs 12 of the corrugated core base paper 11 on the side surfaces 5 and 6 on the short sides facing each other.
However, the parallel valleys 1 of the corrugated core paper 11 on the bottom surface 2
side parts 5 and 6 on the short side, which are parallel to 2;
side extensions 15, 15, 16, 16 at each end of the
are provided respectively, and these side extensions 15,
15, 16, 16 are folded inward and attached to the inner surfaces of the side surfaces 5, 6 with their tips abutting each other.