JP2000264366A - Double cylindrical reinforced container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fold a container into a rhombic form before a fluid material is put into the container and when the container is dumped after the fluid therein is used up. SOLUTION: Left and right side boards 4, 4 are erected from the left and right sides of a square bottom 2 through flexible first fold lines 3, 3, and the upper ends of the boards 4, 4 are connected to the left and right side edges of a square top board 6, having an insertion hole at its center, through flexible second fold lines 7, 7 to form a paper cylinder 1. A flexible bag-shaped element 22 is put into the cylinder 1 and a rigid mouth neck 23 protruding from a mouth of the element 22 is inserted into the insertion hole so as to project therefrom, and an outwardly directed flange 24 at the lower end of the neck 23 is mounted on the periphery of the insertion hole. Corners of the cylinder 1 located on the fold lines 3, 7, respectively, are folded into the cylinder 1 to form folded parts 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a double cylindrical reinforcing container.

[0002]

2. Description of the Related Art For example, as shown in Japanese Utility Model Laid-Open No. 7-22968,
A plurality of recesses are formed on the outer surface of the body portion of the thin synthetic resin container, and a folded flap projecting inward and downward from the paper cylinder fitted to the outer surface of the body portion is formed in the recesses. By the restoring force of the folded flap, the front end of the flap is brought into contact with the lower part of the recess forming wall so that the paper cylinder is not pulled out from the outer surface of the container body, and the container body is The upper part is provided so as not to be pulled out upward by engaging the upper end of the paper cylinder with a downward step portion provided around the upper end of the outer surface of the trunk.

[0003]

In the conventional double cylindrical container described above, the container body must be fitted into the paper cylinder from above the paper cylinder while the flapper is bent inward and downward. Therefore, the folded flaps hinder the fitting of the container body into the paper cylinder, and it is difficult to fit the paper cylinder tightly to the outer surface of the body. Further, it is troublesome to bend the flapper inward before fitting the container body into the paper cylinder.

[0004] The present invention is provided to eliminate the above-mentioned drawbacks so that the container can be easily formed, and before filling the container with the fluid or after using the fluid, use the container in a plate shape. It is provided so that the volume can be reduced by being deformed.

[0005]

Means for Solving the Problems As a first means, a first plate which can be bent and stretched from both left and right side edges of a bottom plate portion 2 provided in a square shape.
The right and left side plate portions 4 and 4 are erected through the fold lines 3 and 3, and the upper edge of the both side plate portions can be bent and stretched to the right and left side edges of a square top plate portion 6 having an insertion hole 5 in the center. A paper cylinder 1 having front and rear openings on both sides, connected via the second fold lines 7, 7;
The flexible bag-shaped portion 22 is accommodated in the paper cylinder 1, and the rigid mouth-and-neck portion 23 rising from the mouth of the bag-shaped portion is inserted into the insertion hole 5.
And a container body 21 made of synthetic resin having an outward flange 24 attached to the lower end of the mouth and neck portion mounted on a top plate portion around the insertion hole. The corners at both ends of the first and second fold lines 3 and 7 were inverted into the paper cylinder to form a folded portion 13.

As a second means, the above-mentioned first means is provided and the fold portion 13 is formed by forming a third fold line 9 near a corner of each of the plate portions 2, 4, 6 close to a corner. By doing so, an isosceles triangle 10 is formed in the corner development shape, and the triangle is formed as a reversing portion having a shape that bilaterally symmetrically bisects the first and second fold lines at both ends as the center line 11, Each of the reversing portions was pushed inward into the paper cylinder and reversed, so that the center line 11 was formed into a concave trough shape with a concave line.

As a third means, an appropriate number of ribs 8 having the first or second means and having the inner or outer surface concave and the outer or inner surface convex on the left and right side plate portions 4, 4 are provided. Was installed vertically.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, the container of the present invention comprises a paper tube and a synthetic resin container.

The paper cylinder 1 has right and left side plate portions 4 and 4 erected through first fold lines 3 and 3 which can be bent and stretched from left and right side edges of a bottom plate portion 2 formed in a square shape. The upper edge of the section is connected to the left and right side edges of a rectangular top plate 6 having an insertion hole 5 in the center via second fold lines 7, 7 which can be bent and stretched. The paper cylinder is open on both front and rear sides,
It is made of cardboard or cardboard, but includes synthetic paper. As shown in the figure, a suitable number of ribs 8 having a concave inner surface and a convex outer surface may be provided vertically on the left and right side plate portions. The rib may have a convex inner surface and a concave outer surface.

[0010] The four corners of each of the four plate portions forming the corners located at both ends of the first and second fold lines are used to invert the corners inward of the paper cylinder. The third fold line 9 is formed. These third fold lines form the respective corners into an isosceles triangle 10 in an expanded shape as shown in FIG. 3, and the isosceles triangle is formed by the first and second fold lines 3, 7 described above. Are provided as center lines 11 so that the isosceles triangles are two right and left symmetric right triangles 12. Each corner thus formed forms an inversion, and these inversions are
The outer end of the center line 11 is pushed into the paper cylinder and inverted, thereby forming a fold 13 having a trough-shaped cross section in which the center line forms a concave line.

The container body 21 made of a synthetic resin has a flexible bag-like portion 22 inserted into the paper cylinder 1, and a rigid mouth-neck portion 23 stands up from the mouth of the bag-like portion. The outward flange 24 attached to the lower end of the mouth and neck is placed on the top surface of the top plate around the insertion hole 5.

The bag-like portion 22 is stored in a folded state in the folded paper cylinder 1 as shown in FIG. 3 when no stored matter is put in the bag-like portion 22, and as shown in FIG. When the contents are filled, the bottom of the bag-shaped portion is pressed against the bottom plate 2 of the paper cylinder, and the left and right side surfaces are the left and right side plates 4,
4 so as to be pressed against the inner surface. At this time, it is desirable that both front and rear surfaces of the bag-shaped portion 22 be located inwardly of the front and rear open end surfaces of the paper cylinder and provided so as not to protrude outward.

The bag-like portion 22 may be inserted into the paper cylinder 1 by inserting the bag-like portion 22 in a state where the above-described insertion hole 5 is contracted, and a number of cuts are provided in a top plate portion around the insertion hole. In this way, the periphery of the insertion hole is formed of a plurality of elastic pieces, and an outward flange 24 is inserted into the insertion hole from inside the paper cylinder against the elasticity of the elastic pieces.
Can be inserted by inserting

As shown in FIG. 1, after a fluid such as a liquid is put into the container body, the above-mentioned corners are respectively turned inward to the inside of the paper cylinder 1 to form a folded portion 13.

[0015]

According to the present invention, the vertical cylinder 1 has first and second opening portions at the front and rear end faces thereof, and connects the bottom plate portion 2, the left and right side plate portions 4, 4 and the top plate portion 6 to each other. Second fold line 3, 7
Since each can be bent and stretched, and since the container portion to be accommodated in the paper cylinder is a flexible bag-like portion 22,
Before putting the items into the container body, the paper cylinder can be folded in a rhombic shape without turning over each corner as shown in FIG. 4, and thus the storage space of the container can be narrowed. .

When the storage object is to be inserted, the corners are turned over to form the folds 13 so that the folds form ribs, thereby preventing deformation of the paper cylinder and having a square shape as viewed from the front. Since the shape can be maintained, and the bag-shaped portion is released from the compressed state by the paper tube in this way,
It is easy to fill the bag into the bag-like portion through the mouth and neck 23.

After the use of the stored items, the folded portions 13 can be returned to the folded state by reinverting the folded portions 13 again as shown in FIG. 4, so that the volume of the container at the time of disposal can be reduced.

According to the third aspect of the invention, the rigidity of the left and right side plate portions 4, 4 when storing the stored items can be increased, and the container can be easily held.

[Brief description of the drawings]

FIG. 1 is a perspective view of a container of the present invention.

FIG. 2 is a sectional view of a main part of the container.

FIG. 3 is an enlarged development view of a main part of the container body.

FIG. 4 is a perspective view showing a folded state before a storage item is put into a container body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Paper cylinder 3 ... 1st fold line 7 ... 2nd fold line 9 ... 3rd fold line 11 ... Center line 13 ... Folding part 21 ... Container body 22 ... Bag-shaped part

Claims (3)

[Claims] 1. The left and right side plate portions 4, 4 are erected from the left and right side edges of a bottom plate portion 2 provided in a square shape via first fold lines 3, 3 which can be bent and stretched. To the left and right side edges of a square top plate 6 having an insertion hole 5 in the center,
The paper cylinder 1 having front and rear openings on both sides and the flexible bag-shaped part 22 connected via the second foldable lines 7 and 7 are accommodated in the paper cylinder 1. Insert the rigid mouth and neck 23 standing up from the mouth into the insertion hole 5
And an upright flange 24 attached to the lower end of the mouth and neck portion is placed on a top plate portion around the insertion hole. Wherein the corners at both ends of the first and second fold lines 3 and 7 are inverted into the paper cylinder to form a folded portion 13. 2. By forming a third fold line 9 near the corner of each of the plate portions 2, 4, and 6 adjacent to the corner, the folded portion 13 is formed into an isosceles triangle in a corner developed shape. 10, the triangular shape is formed as a reversal portion having a shape in which both ends of the first and second fold lines are center lines 11 and symmetrically bisected in a bilaterally symmetrical manner. 2. The double cylindrical reinforcing container according to claim 1, wherein the center line 11 is formed into a concave trough shape by being pushed and reversed. 3. The right and left side plate portions 4, 4 are provided with an appropriate number of ribs 8 whose inner surface or outer surface is concave and whose outer surface or inner surface is convex. The double tubular reinforced container according to the above.