JP2001240043A - Polygonal paper box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an upper end face of a coupling piece at a corner invisible from an upper surface of a paper box by a simple structure. SOLUTION: The coupling piece 23 provided at both ends of a double sidewall 11 is two-folded and received in a notch 25 provided on an outer end wall 12b of an adjacent double end wall 12 to be fixed. Thus the upper end face of the coupling piece 23 is not exposed from the upper surface of the box.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polygonal paper box formed of cardboard.

[0002]

2. Description of the Related Art A corner portion of a polygonal paper box is formed by connecting ends of adjacent side walls to each other with connecting pieces. As shown in FIGS. 7 and 8, in order to increase the watertightness of the corners, there is a structure in which adjacent side walls 2a, 2b, 2c, and 2d are connected in series by connecting pieces 4a, 4b, 4c, and 4d. . This paper box includes folds 1a, 1a provided on each side of the bottom wall 1.
b, 1c, 1d, the side walls 2a, 2b, 2c, 2d are raised, and at the same time, the connecting pieces 4a, 4b, 4c, 4
d is folds 3a, 3b on both sides, folds 3b, 3c, folds 3c, 3d, folds 3d, 3a and a fold 5a at the center,
5b, 5c, and 5d, bent so as to protrude outwardly, each side wall is raised until both ends of each side wall abut with both ends of the adjacent side wall, and then, as shown in FIG. The inner surfaces of the pieces 4a, 4b, 4c, and 4d are fixed to both end portions of the side walls 2a and 2c by using an adhesive.

[0003]

However, as is apparent from FIG. 8, since the upper end surfaces of the connecting pieces 4a, 4b, 4c, and 4d are exposed on the upper surface of the box, not only is the appearance unfavorable, but also the contents are not good. If there is a leak from the upper surface of the box, there is a problem that it penetrates from the upper end surface of the connecting piece or penetrates into the fold.

On the other hand, a double side wall has conventionally been used to reinforce the side wall, but a connecting piece similar to that shown in FIGS. 7 and 8 is provided, and this connecting piece is connected to the adjacent double side wall. Some are sandwiched between them. In such a paper box, since the upper end surface of the connecting piece is hidden, the above-mentioned problem can be solved.
There is a problem that a complicated device such as a point sticking box making machine is required, which increases the cost.

An object of the present invention is to prevent the upper end surface of the connecting piece at the corner from being exposed to the upper surface of the box with a simple structure.

[0006]

In order to solve the above-mentioned problem, the present invention relates to a polygonal paper box having a double peripheral wall composed of an inner peripheral wall and an outer peripheral wall, wherein both inner peripheral walls of adjacent peripheral walls are integrally connected by a connecting piece. Connected, this connecting piece is folded in two and bent from the edge of one peripheral wall to the outer surface of the other peripheral wall, and the outer peripheral wall of the other peripheral wall is provided with a notch that does not reach the upper edge thereof, and the folded connection is performed. The piece was housed in this notch and fixed. With this configuration, the upper end surface of the connecting piece is not exposed on the upper surface of the paper box.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a blank forming the paper box of the present invention. As shown, a square bottom wall 10 is shown.
Are provided with a pair of inner side walls 11a, 11a via folds 10a, 10a and a pair of inner end walls 12a, 12a via folds 10b, 10b. These inner wall 11a and inner end wall 12a
b has a trapezoidal shape extending outward, and the inner wall 11a and the inner end wall 12a have folds 10c, 10c, respectively.
An outer wall 11b and an outer end wall 12b are formed via d.

[0008] Both ends of the inner side wall 11a and the inner end wall 12a are connected by connecting pieces 23 integrally formed via folds 21a and 22a. This connecting piece 2
A fold 23a is formed at the center of 3 so that the connecting piece 23 can be folded in two. A connecting piece 24 is provided at each end of each outer wall 11b via a fold 21b, and a notch 25 is provided at each end of each outer end wall 12b. The upper edge 25a of this notch 25
(See FIGS. 3 and 4) are located below the fold line 10d. The triangle divided by the center fold 23a of the connecting piece 23, the triangle of the connecting piece 24 and the notch 2
The triangle connecting both ends of 5 is almost the same.

When assembling a box from a blank as shown in FIG. 1, first, the outer walls 11b, 11b and the outer end walls 12b, 12
b to be creases 10c, 10c, 10d, and 10d, respectively.
Along the inner side walls 11a, 11a and the inner end wall 12
a and 12a are bonded to the outer surfaces (the back surface in FIG. 1) with an adhesive. FIG. 2 shows a state in which they are bonded together. FIG. 2A is a view from the front side, and FIG. 2B is a view from the back side. In this case, connection pieces 24 provided at both ends of each outer wall 11b are provided.
As shown in FIG. 2 (b), the fold 23a of the connecting piece 23
Is attached to one of the triangular portions divided in two. Thus, each side wall 11a and 11b and each end wall 12a and 12b
Are supplied to the automatic box making machine in a state of being overlapped with each other.

In the above state, as shown in FIG. 3, a side wall 11 composed of an inner side wall 11a and an outer side wall 11b and an inner end wall 12 are formed.
a and the outer end wall 12b, the end wall 12 is bent along the fold lines 10a and 10b, rises from the bottom wall 10, and the edges of the side wall 11 and the end wall 12 are joined to join the connecting piece 23 to the connecting piece 23. The connected connecting piece 24 projects from the edge of the end wall 12 in a state of being folded in two. Therefore, the protruding connection piece 23 (including the connection piece 24) is bent along the folds 21a and 22a in the direction of the notch 25 formed at the end of the end wall 12, and the connection folded in two at the fold 23a. The piece 23 is fixed in the notch 25 with an adhesive. Notch 25
As shown in FIG. 4, since the connection piece 23 folded in half is formed in advance in a shape that fits snugly, the upper end face of the connection piece 23 is not seen from the upper surface of the box.

The notch 25 for housing the connecting piece 23 is
The shape is not limited to the triangular shape as shown in the drawing as long as the connecting piece 23 cannot be seen from the upper surface of the box. For example, a shape as shown in FIG. 5 may be used. The shapes of the connecting piece 23 and the connecting piece 24 may be defined so as to match the shape of the notch 25. FIG. 6 shows a connecting piece 23 of a box formed from a blank as in FIG. 5 and a notch 25 containing the connecting piece.

As the material of the paper box of the present invention, in addition to cardboard, paper coated with synthetic resin, synthetic resin film or metal foil bonded together can be used. Further, the shape of the box is not limited to a square, but may be a triangle or other polygons. Therefore, in the above-described embodiment, the side wall and the end wall are distinguished from each other, but there is no particular need to distinguish them as long as they form the peripheral wall.

[0013]

According to the present invention, as described above, the connecting piece provided on the peripheral wall of the double-walled polygonal container is joined to the outer surface of the adjacent peripheral wall. Can be automatically manufactured by a simple device such as the above, and the cost can be reduced. And since the connection piece was stored in the notch provided on the outer surface of the adjacent peripheral wall, the end face of the connection piece was not exposed on the upper surface of the box, which was not only preferable in appearance but also that liquid etc. permeated from the end face. And water resistance can be increased.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a paper box blank of the present invention.

FIG. 2 (a) A plan view in which the blank is a double wall, and (b) a back view in the same.

FIG. 3 is a perspective view showing a state of a corner portion during assembly of the paper box.

FIG. 4 is a front view of a paper box.

FIG. 5 is a plan view showing another example of a blank.

FIG. 6 is a front view of a paper box formed from the blank.

FIG. 7 is a perspective view showing a corner portion of a conventional paper box.

FIG. 8 is a plan view of a conventional paper box.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bottom wall 1a, 1b, 1c, 1d Fold 2a, 2b, 2c, 2d Side wall 3a, 3b, 3c, 3d Fold 4a, 4b, 4c, 4d Connecting piece 10 Bottom wall 10a, 10b, 10c, 10d Fold 11 Side wall 11a Inner side wall 11b Outer side wall 12 End wall 12a Inner end wall 12b Outer end wall 21a, 21b Fold 22a, 22b Fold 23 Connecting piece 24 Connecting piece 25 Notch 25a Notch upper edge

[Procedure amendment]

[Submission date] February 29, 2000 (200.2.2
9)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 1

[Correction method] Change

[Correction contents]

FIG.

Claims (1)

[Claims] 1. In a polygonal paper box having a double peripheral wall composed of an inner peripheral wall and an outer peripheral wall, both inner peripheral walls of adjacent peripheral walls are connected by an integral connecting piece, and the connecting piece is folded in half to form one peripheral wall. From the end edge of the other peripheral wall to the outer surface of the other peripheral wall, a notch is provided on the outer peripheral wall of the other peripheral wall so as not to reach the upper edge thereof, and the folded connection piece is stored and fixed in the notch. Characterized polygonal paper box.