JP2000159222A - Paper box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper box with an insertion piece to be easily inserted into an insertion hole. SOLUTION: A front wall 2, a rear wall 3 and a pair of side walls 4, 4 are disposed in upright on the periphery of a bottom wall 1, and a cover sheet 5 is formed continuously on the upper end edge of the rear wall 3, and an insertion piece 6 is formed on the end edge of the cover sheet 5, and the front wall 2 is formed into the double structure and an insertion hole 7 is formed on its top, and the end of the insertion piece 6 is inserted into the insertion hole 7 and sealed in the constitution of a paper box. The end of the insertion piece 6 is folded toward the upper section inside through a folding section 6c, and the fronts of two folding lines 6a and 6b forming the folding section 6c are formed narrow toward both ends so that both ends of the folding section 6c are drawn thinly and protruded downward and the insertion piece 6 is not inserted from the end edge but from a drawn section of the folding section 6c into the insertion hole 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging paper box having an undulating cover plate.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 7, a front wall 2, a rear wall 3, and a pair of end walls 4, 4 are erected around a bottom wall 1,
A cover plate 5 is continuously provided on the upper edge of the rear wall 3, and
The front wall 2 has a double structure, and an insertion hole 7 is formed at the top thereof. The flap 8 extending from the upper edge of the end wall 4 is bent inward to close the lid plate 5. With insert 6
Is inserted into the insertion hole 7, and further, a hook-shaped lock piece 10 cut out from the front wall 2 is inserted into the lock hole 9 at the base of the insertion piece 6 to seal the paper box. ing.

[0003]

However, in the paper box as described above, when the insertion piece 6 is inserted into the insertion hole 7,
There is a problem that the leading edge of the insertion piece 6, which is a cut edge of the paper, hits the peripheral edge of the insertion hole 7 and is difficult to insert.

[0004] Therefore, an object of the present invention is to provide a paper box in which an insertion piece can be easily inserted into an insertion hole.

[0005]

According to the present invention, a front wall, a rear wall and a pair of end walls are erected around a bottom wall, and a lid plate is provided on an upper edge of the rear wall. A plug is provided at the leading edge of the lid plate, the front wall is formed as a double structure, a plug hole is formed at the top thereof, and the plug is inserted into the plug hole and sealed. In the paper box, the tip of the insertion piece is folded inward and upward through a bent portion,
The insertion piece is inserted into the insertion hole from the bent portion instead of the leading edge.

In addition, the interval between two fold lines forming the bent portion of the insertion piece is changed so that the bent portion is gradually narrowed down toward a narrow portion and projects downward. Then, the insertion piece is inserted into the insertion hole such that the insertion piece is guided from the throttle portion.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Parts corresponding to the respective parts of the conventional paper box shown in FIG.
Duplicate description is omitted.

The paper box shown in FIGS. 1 and 2 is made of the blank shown in FIG. 3, and has a front wall 2, a rear wall 3 and a pair of end walls 4, 4 which are connected to each other and extend from an outer edge of the rear wall 3. The substitute piece 11 is attached to the end wall 4 on the opposite side, and is continuously provided in a rectangular tube shape. In addition, the bottom wall 1 is formed by combining four bottom pieces 1a to 1c respectively connected to the front wall 2, the rear wall 3, and the lower end edges of the pair of end walls 4, 4. An outer front plate 2a sandwiched between walls 4 and 4, and a top plate 2b sequentially connected to the upper edge thereof
And the inner front plate 2c.

The leading end of the insertion piece 6 is bent at a bent portion 6c.
As shown in FIGS. 3 and 4, the interval between the two fold lines 6a and 6b forming the bent portion 6c is wide at the center portion and gradually narrows toward both ends. ing. For this reason, when the insertion piece 6 is bent along the fold lines 6a and 6b, both ends of the bent portion 6c are narrowed down more thinly than the center portion, and project slightly downward. In addition, the insertion hole 7 is formed such that the edge on the inner front plate 2c side is gradually deepened from both ends to the center.

In the above-mentioned paper box, as the cover plate 5 is closed, the insertion piece 6 is formed at both ends of the narrowed bent portion 6c without the leading edge, which is the cut end of the paper, caught on the periphery of the insertion hole 7. , So that it is smoothly inserted into the insertion hole 7.

When the insertion piece 6 is inserted into the insertion hole 7, the bulging central portion of the bent portion 6c is positioned at the outer front plate 2a.
And the inner front plate 2c is sandwiched between them to maintain the interval, thereby improving the stability of the box.

Further, the folded insert piece 6 acts as a cushioning material, and the distance between the outer front plate 2a and the inner front plate 2c can be increased to further enhance the cushioning property.

The fold lines 6a and 6b may be arc-shaped in addition to the fold lines shown in the figure.
One of the fold lines 6a and 6b may be a straight line.

As shown in FIG. 6, fold lines 6a, 6a
The interval b may be narrow at the center and gradually widen toward both ends.

In this case, the center of the bent portion 6c of the insertion piece 6 is narrowed down from both ends and protrudes downward, and is inserted into the insertion hole 7 from the center.

When sealing with an adhesive tape, the lock hole 9 and the lock piece 10 may be omitted.

[0017]

As described above, in the paper box according to the present invention, the tip end of the insertion piece is folded inward and upward through the bent portion, so that when the insertion piece is inserted into the insertion hole, The leading edge of the insertion piece does not catch on the periphery of the insertion hole, and the insertion piece is smoothly inserted into the insertion hole from the bent portion.

The interval between the two fold lines forming the bent portion of the insertion piece is changed so that the bent portion is gradually narrowed toward a narrow portion and projects downward. Then, the insertion piece is inserted into the insertion hole such that the insertion piece is guided from the narrowed portion, so that the insertability is further improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a paper box according to the present invention.

FIG. 2 is a vertical sectional side view of a main part of the above.

FIG. 3 is a view showing a blank of the paper box according to the first embodiment;

FIG. 4 is an enlarged view of the insertion piece of the above.

FIG. 5 is an enlarged view of another example of the insertion piece of the above.

FIG. 6 is an enlarged view of another example of the insertion piece of the above.

FIG. 7 is a perspective view of a conventional paper box.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bottom wall 2 Front wall 3 Rear wall 4 End wall 5 Cover plate 6 Insertion piece 6a, 6b Fold line 6c Bending part 7 Insertion hole

Claims (2)

[Claims] 1. A front wall, a rear wall, and a pair of end walls are erected around a bottom wall, and a lid plate is connected to an upper edge of the rear wall. The front wall has a double structure, and an insertion hole is formed at the top of the front wall, and the insertion piece is inserted into the insertion hole to seal the paper box. A paper box characterized by being folded inward and upward through a curved portion. 2. The interval between two fold lines forming a bent portion of the insertion piece is changed so that the bent portion is gradually narrowed toward a narrow portion and projects downward. The paper box according to claim 1, wherein: