JPH0417457Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a corrugated cardboard blank provided with a cut line in advance for opening a corrugated cardboard box.

[Conventional technology]

It is known to provide a cut line in advance so that a specific part of a cardboard box can be easily opened by hand. This cut line is a perforation that passes through the liners 2, 2' and the core 3 of the corrugated board blank 1, as shown in FIG. This is a perforation that is cut to an appropriate depth and no cut is made in the other liner 2'. Since these are all interrupted lines, they are suitable for maintaining the strength of the corrugated board blank, but they have the disadvantage that they have a large resistance when cut by hand and do not break easily.

Moreover, since it is a perforation, so-called burrs are formed at the break line, which is unfavorable in terms of appearance.

[Problem for invention]

Therefore, the object of this invention is to eliminate the above-mentioned drawbacks, and to provide a corrugated cardboard blank wire that is easy to break and has a good appearance after being broken.

[Means of problem solving]

In order to solve the above problems, this invention provides a corrugated board blank having liners on both outer surfaces and at least one level of core between them, and a continuous score line extending from one outer surface liner to an appropriate depth of the core. , a discontinuous score line was provided through the other outer liner and communicating with the continuous score line.

[Effect]

The other outer liner has discontinuous score lines such as perforations, but one outer liner has continuous score lines, and both score lines are connected, so it is easy to handle. It can be easily broken at the rupture line, and there is almost no burr at the break line.

〔Example〕

FIG. 1 shows an example of a cardboard blank. As shown, a top plate 11, one side plate 12, a bottom plate 1
3. The other side plate 14 has crease lines 15 and 1, respectively.
6 and 17, and cut lines 18 and 18' consisting of perforations are provided at both ends of the top plate 11.
Outer end wall flaps 19, 20 are provided through the bottom plate 13, and fold lines 21, 21' are provided at both ends of the bottom plate 13.
via the other outer end wall flap 19', 2
0' is provided.

Further, inner end wall flaps 22, 22', 23, 23' are provided at both ends of the side plates 12, 14, respectively, through a fold line common to the fold lines 21, 21'.

Furthermore, a glue allowance 24 is provided on the side edge of the top plate 11.
is provided.

The cut lines 18, 18' are connected to two cut lines 25 provided in the vertical direction of the top plate 11. As shown in FIG.
Continuous score line 1 cut to a predetermined depth of 114
15, and a discontinuous score line 116, such as a perforation, passing through the other liner 112 and communicating with the continuous score line 115.

To form such a cut line 25, for example, a cutter 30 as shown in FIG. 3 may be used. That is, the continuous cutting edges 31 are comb-shaped. When the convex portion 32 of this cutter 30 cuts through the other liner 112, a score line as shown in FIG. 2 is formed.

Note that the corrugated board used for the blank 10 may have a single core 113 as shown in the figure, or may have a multi-tiered core 113.

To assemble the blank 10 into a case, the bottom plate 13 and the side plates 12, 14 are bent along the fold lines 16, 17 so that they are at right angles, and the inner end wall flaps 22, 22' and 23, 23' are attached to the side plates 12, 14. 1
Fold at right angles to 4 and attach outer end wall flap 1 on top of it.
9' and 20' are overlapped and fixed in advance with adhesive or the like. After storing the contents, fold the top plate 11 along the crease line 15, cover the opening,
When the outer end wall flaps 19, 20 are fixed to the upper halves of the inner end wall flaps 22, 22', 23, 23' with adhesive or the like, and the adhesive portion 24 is fixed to the side plate 14, the fourth
A case like the one shown in the figure will be created.

The top plate 11 of this case has cut wires 18, 1
8' and a cut line 25 are provided, so when opening the package, first pull up the ends of the two cut lines 25 and tear along the cut lines 25. A slit is formed. When a finger is inserted into the slit and the slit is opened on both sides, the top plate 11 is broken along the cut lines 18 and 18', and the package is opened as shown in FIG.

〔effect〕

According to this invention, as described above, the cut line is constructed by providing continuous score lines on one side of the cardboard blank and discontinuous score lines on the other side, so that it can be easily broken by hand, and the cut line can be easily cut by hand. It has the advantage of having less burrs and a favorable appearance.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an example of a corrugated board blank provided with a cut line, Fig. 2 is a sectional view showing an example of the structure of the cut line, and Fig. 3 is an example of a cutter for providing the same cut line. Partial front view shown, No. 4
FIG. 5 is a perspective view of the case formed from the blank shown in FIG. 1, FIG. 5 is a perspective view showing the same case in an unsealed state, and FIGS. 6 and 7 are sectional views showing conventional cut lines. 25...cut wire, 111...one liner,
112...other liner, 113...center core, 11
5...Continuous score line, 116...Discontinuous score line.

Claims (1)

[Scope of utility model registration request] A corrugated cardboard blank having liners on both outer surfaces and at least one core between them, a continuous score line extending from one of the outer liners to an appropriate depth of the core;
A corrugated board blank having discontinuous score lines extending through the other outer liner and communicating with said continuous score line.