JPH0420734Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a square cylindrical paper container made of paperboard as a base material and a thermoadhesive synthetic resin laminated on both sides. The present invention relates to a paper container having a structure in which the top, bottom, and body part of the paper container are folded flat.

[Prior Art] Conventionally, a roof-shaped paper container in which thick folding lines are provided in some parts to facilitate folding and forming of the parts where multiple sheets are combined is described in Japanese Patent Application Laid-Open No. 126039/1983 and is well known. However, as shown in Figure 3, in a rectangular cylindrical paper container made of paperboard, the top and bottom molding creases a are in line with the body molding creases b, and the top of the container , when folding the bottom flat, the folded part is made of two pieces of paperboard, and the outside part is stretched and the inside part is compressed, so even if the fold line is in a straight line, it will not be possible to form it along this line. It seemed impossible. As a result, the portion of the folded piece that was adhered to the body was insufficiently adhered. Note that the thick fold line of the roof-shaped paper container is limited to the vertex of the folded palms, and cannot be applied to the rectangular cylindrical paper container, top, bottom, and body as in the present invention.

[Problem to be solved by the invention] The problem of the invention is to provide a paper container in which fold-forming of the two-ply part, which cannot be conventionally formed smoothly, can be easily and accurately formed in a rectangular cylindrical paper container. There is a particular thing.

[Means for Solving the Problems] The means of the present invention is to make two longitudinal folds on a paperboard having a heat-adhesive synthetic resin layer on both the front and back sides, and to form a body between the two folds. The outside of the eye is the top and bottom, and the top and bottom are provided with folds parallel to the longitudinal fold, the outside of which is the body gassho seal part, and the fold is perpendicular to the longitudinal fold. In a square cylindrical paper container which is folded into a square tube shape with several strips of folded edges and is provided with bottom gassho seal folded pieces at both ends, the top horizontal folded piece 19 has an isosceles triangular fold provided at the top. top horizontal fold 3
4, 35 and the bottom horizontal fold 22 of the bottom horizontal folding piece 18, 21 having a triangular fold provided at the bottom.
23, 36, and 37 are applied to the two longitudinal folds 38, 39 forming the body section with steps provided at the top on the outside and on the inside at the bottom, respectively;
The top horizontal folds 34, 35 and the bottom horizontal folds 2
2, 23, 36, 37, fold 40 on the folded piece 102 side of the bottom gassho seal part, folds 9, 3 on the ears thereof
3. Fold 1 on the folded piece 101 side of the body part palm seal part
The thickness of each of the folds No. 5 and 29 is made thicker than the other folds for molding.

[Example] The specific structure of the paper container according to the present invention will be explained with reference to FIGS. 1 and 2.

In the present invention, as shown in FIG.
The positions of the top horizontal folds 34, 35 and the bottom horizontal folds 22, 23, 36, 37 of the bottom horizontal folded pieces 18, 21 having triangular folds at the bottom are aligned with the folds 38, 39 forming the body. On the other hand, the top part has a step on the outside and the bottom part has a step on the inside.

This level difference depends on the thickness and stiffness of the paperboard, but it is preferably about 1/2 the thickness of the paperboard.

Next, the thicknesses of the top horizontal folds 34, 35, the bottom horizontal folds 22, 23, 36, 67, and the fold 40 on the folded side of the bottom gassho seal portion are made thicker than the other forming folds. The appropriate thickness of the fold is 1.5 times the thickness of other forming folds.

Furthermore, folding piece 101 side fold 1 of body part palm seal part
5, 29, the folds 9, 33 of the side ears of the folded piece 102 of the folded palm seal portion at the bottom are made thicker to widen the weakening range of the paperboard.

[Function] By creating a step between the horizontal folds 34 and 35 at the top and the horizontal folds 22, 23, 36, and 37 at the bottom from the folds 38 and 39 forming the body, Folded piece 18,1 with triangular folds
When folding 9, 21 into the body, the outer side of the two paperboard pieces outside the container is neatly folded along the inner side.

On the folded side of the gassho seal part, the paperboard is folded 180 degrees.

[Effects of the invention] According to the invention, the top, bottom, and body of the container can be easily folded and folded, and the palms-up seal portion can be easily folded back.

[Brief explanation of the drawing]

FIG. 1 is a developed plan view showing an embodiment of a paper container according to the present invention, FIG. 2 is an assembled perspective view, and FIG. 3 is a developed plan view of a conventional paper container. 9, 15, 29, 33, 40...fold, 18,
19, 21... Folded piece, 22, 23, 36, 3
7... Bottom horizontal fold, 34, 35... Top horizontal fold, 101, 102... Folded piece.

Claims (1)

[Scope of utility model registration request] Two longitudinal folds are made on a paperboard having a heat-adhesive synthetic resin layer on both the front and back sides, the space between the two folds forms a body, and the outside of the longitudinal fold forms a top and a bottom,
Creases parallel to the longitudinal folds are provided on both top and bottom parts, and the outside thereof is used as a trunk gassho seal part,
In a square cylindrical paper container that is folded into a square tube shape by making several folds perpendicular to the longitudinal fold, and has folded pieces at both ends of the bottom gassho seal, the isosceles paper container provided at the top of the container is The top horizontal folds 34, 35 of the top horizontal folding piece 19 having a triangular fold and the bottom horizontal folds 22, 23, 36, 3 of the bottom horizontal folding pieces 18, 21 having a triangular fold provided at the bottom.
7 is applied to the two longitudinal folds 38 and 39 that form the body, with steps provided at the top on the outside and on the inside at the bottom, and the top horizontal folds 34 and 35 and the bottom Horizontal folds 22, 23, 3
6, 37, the thickness of each fold of the fold 40 on the side of the folded piece 102 of the bottom gassho seal part, the folds 9 and 33 of the ears, and the folds 15 and 29 of the folded piece 101 of the body part palms palm seal part. A square cylindrical paper container whose folds are thicker than other molding folds.