JP2011255954A - Composite container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composite container having an inwardly curl that is formed along the lower end of an outer sleeve and is resistant to deformation.SOLUTION: The composite container 1 is provided with: a notch or a slit for separating an inward curl formation region that is formed at an inside overlap of a blank of the outer sleeve 3 from an adjacent inward curl formation region; and a support piece that has an area smaller than an inward curl formation region formed in an outside overlap corresponding to the inside overlap. Thus, buckling in the process of forming an inward curl 4 and returning of the curled shape to the original shape after the forming process can be prevented at the same time.

Description

  The present invention relates to a composite container comprising a container body and an outer sleeve fitted on the container body, and particularly to a structure in which an inwardly curled portion formed at the lower end of the outer sleeve is not easily deformed.

  As a structure of a heat insulating container in which an outer sleeve having an inwardly curled portion at the lower end is externally fitted to the container main body, for example, in the method for manufacturing a heat insulating container disclosed in JP-A-2002-255147, in the outer sleeve of a double heat insulating container, In order to improve the shape of the inwardly curled portion, the outer sleeve is formed by laminating and adhering both ends of a belt-shaped sleeve material to each other, and then the adhesive portion is wound around the container body. The sleeve material is combined with the container body, and the sleeve material is formed with a cut portion for reducing the overlap area, and the cut portion has a 50% overlap area in the region corresponding to the inwardly curled portion. The sleeve material is cut so as to decrease and exceed the region corresponding to the inwardly curled portion. , Of said end portion of said sleeve member, formed at the end of a side that is disposed in the container interior, configuration which is formed by cutting off an end portion of a corner of the sleeve member diagonally it is disclosed.

Further, the applicant of the present invention is a composite container in which a separate paper sleeve is wound around the outer periphery of a plastic container as a composite container disclosed in Japanese Patent Application Laid-Open No. 2007-191180, and is recessed inwardly at the lower outer periphery of the plastic container A configuration is disclosed in which a concave portion is formed, and a curled portion formed inwardly along the lower end of the paper sleeve is fitted into the concave portion to attach the paper sleeve to the outer periphery of the plastic container.
Here, when the container and the outer sleeve are molded separately and fitted in use, the inwardly curled portion of the outer sleeve is affected by the environment even if the upper part of the outer sleeve is fixed or locked to the container. If moisture such as humidity or condensation enters the paper, the paper will be deformed by the restoring force when it dries and the curled part will return to its original shape.
Conventionally, since the inward curl forming portions are integrally continuous along the lower end of the blank, the restoring force of the paper cannot be reduced only by reducing the area to be bonded as in the former case.
Further, the lower end of the seam portion cannot be pressed to form the inwardly curled portion, and the lower end side of the seam portion cannot be bonded.
The inwardly curled portion has a configuration in which the lower end portion of the sleeve is pressed against an annular groove having a substantially U-shaped cross section using a curling tool mold as shown in the procedure of FIG. When all the inward curl forming parts of the bonding part are notched, it is sufficient that a uniform force is applied to all the lower end of the blank, but if the balance of the force is broken even slightly, the curled part will buckle, There is a problem that a clean inward curl portion cannot be formed.

JP 2002-255147 A JP 2007-191180 A

This invention was invented in view of the above circumstances, and its main problem is
An object of the present invention is to provide a composite container structure in which the inwardly curled portion formed at the lower end of the outer sleeve does not buckle during molding and does not return to the curled shape after molding.

In order to solve the above-mentioned problems, the present invention provides
And a sheet-like outer sleeve that is externally fitted to the container. The outer sleeve is formed by double-bonding one end and the other end of a fan-shaped blank. In the composite container in which an inwardly curled portion curled toward the center side of the container is formed on the lower end side of the sleeve,
The outer sleeve blank has an inner overlap portion and an outer overlap portion that overlap each other at the edge where the blank is formed at the edge of the blank, and a lateral width with a certain length along the lower end edge of the blank. An inwardly curled portion extending in the direction,
The inward curl formation region formed in the inner overlapping portion is provided with a notch or a slit for separating from the adjacent inward curl formation region.
In the invention of claim 2,
The strut piece is set to have a smaller area than an inward curl forming region formed in an outer overlapping portion corresponding to the inner overlapping portion.
In the invention of claim 3,
The inward curl formation region formed in the inner overlap portion and the inward curl formation region formed in the outer overlap portion are not bonded to each other.
In the invention of claim 4,
The column piece portion has a shape that gradually becomes narrower toward the lower end of the blank, and the lower portion of the column portion is disposed at the approximate center of the inward curl formation region formed in the inner overlapping portion. It is characterized by that.
Furthermore, in the invention of claim 5,
The supporting piece piece has an inverted triangular shape, an inverted trapezoidal shape, a semicircular shape, or a semielliptical shape.
In the invention of claim 6,
The lower end of the column piece is set at a position spaced above the lower edge of the blank.

In this invention, since the inward curl formation region formed in the inner overlapping portion is separated from the adjacent inward curl formation region by providing a notch or slit, moisture such as condensation is present on the outer sleeve paper. Even if it penetrates, it does not return to the inwardly curled portion after drying.
Conventionally, when the inwardly curled portion is molded, the seam portion must be curled in a state where the sleeves are overlapped. Therefore, even if a slight forming error occurs, the force applied to the entire sleeve is concentrated on the seam portion. For this reason, the curled portion was buckled, but in this invention, the amount of winding the sleeve of the seam portion is reduced, so that the force applied to the entire sleeve becomes uniform, the buckling does not buckle as compared with the conventional, and the reliability as the inner curled portion Can be increased.

It is a fragmentary sectional view showing an example of a composite container. It is a development view of an outer sleeve, (a) is an outer sleeve of Example 1, and (b) is a conventional outer sleeve. It is explanatory drawing which shows the state where the inward curl formation area of the outer sleeve overlapped simultaneously after curl shaping | molding, (a) is the outer sleeve of Example 1, (b) is the conventional outer sleeve. (A)-(e) is the elements on larger scale which show an example of the shape of a notch part and a support | pillar piece part. (A) is the elements on larger scale which show an example of the shape which divided | segmented the support | pillar piece part with the slit, (b) is the elements on larger scale which show the case where a support | pillar piece part is the same area as the inward curl formation area of an outer overlapping part. is there. It is explanatory drawing which shows the shaping | molding procedure of an inward curl part.

  In the composite container of the present invention, the inward curl formation region and the support piece portion formed in the outer overlap portion are provided by providing the notch portion and the support piece portion in the inward curl formation region formed in the inner overlap portion. Because it is separated, buckling during molding of the inwardly curled portion and prevention of occurrence of return of the inwardly curled portion after molding have been realized.

Hereinafter, preferred embodiments of the composite container of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the composite container 1 of the present embodiment is a composite container 1 in which a separate paper outer sleeve 3 is fitted around the outer periphery of a paper or plastic container 2, and the container A concave portion 2a that is recessed inward is formed in the lower outer peripheral portion of the body portion 2, and the basic structure is the same as that of Japanese Patent Application Laid-Open No. 2007-191180.

  The outer sleeve 3 is formed with an inwardly curled portion 4 curled toward the center side of the container 2 at the lower end side thereof, and the outer sleeve 3 is fitted into the concave portion 2a by fitting the inwardly curled portion 4 to the concave portion 2a. 3 is hooked on the outer periphery of the body of the container 2.

The blank 10 of the outer sleeve 3 is shown in FIG. 2A, and the shape of a conventional blank 10 ′ is shown in FIG.
In the present embodiment, the left and right edge portions 11 and 12 of the blank 10 have an inner overlapping portion 5 and an outer overlapping portion 6 that overlap each other at the position where the sleeves are double-bonded. 10 has an inward curl forming portion 7 extending in the lateral width direction with a certain length along the lower end edge of 10.
Reference numeral 20 denotes a laminate coating applied to the surface of the paper sleeve, and 21 denotes a bonding adhesive portion.

The inward curl formation region 7a formed in the inner overlapping portion 5 has a notch 8 for separation from the adjacent inward curl formation region 7c (see FIG. 4A).
In the illustrated example, the notch 8 is a V-shaped notch.
In this invention, as shown in FIG. 5A, a slit 8 ′ may be provided in place of the notch 8, and the inward curl formation region 7a may be separated.

The inward curl formation region 7a may have the same area as the inward curl formation region 7b formed in the outer overlapping portion 6 (see FIG. 5B). The area may be set smaller than the area 7b (see FIGS. 4A to 4E and FIG. 5A).
The curl forming regions 7a and 7b that are overlapped doubly at the seam portion of the outer sleeve 3 reduce the surface where the inner curl forming region 7a comes into contact with the outer curl forming region 7b, thereby reducing moisture due to humidity and dew condensation. It is possible to further suppress the absorbed paper so that the curled shape does not return to its original shape due to the restoring force at the time of drying.
The curl forming regions 7a and 7b may be bonded together for curling, but if they are not bonded to each other, they will not be affected even if the thickness of the blank is thick, and the curled shape will return to its original shape. Hateful.

On the other hand, when the inward curl formation region 7a is not provided at all, the strength at the time of forming the inward curl is insufficient as described above, which causes the curled portion to buckle. The column piece 9 is required.
The strut piece 9 may have an area narrower than the inward curl forming region 7b of the outer overlapping portion 6 as described above, and may be rectangular, for example (see FIG. 4B).
Accordingly, in this case, the cutout 8 is also a rectangular cutout.

Here, the column piece portion 9 is preferably shaped so that the width gradually decreases toward the lower end of the blank in order to reduce the repulsive force of curl return.
For example, an inverted triangular shape as shown in the figure, an inverted trapezoidal shape (see FIGS. 4C and 4D), a substantially semicircular shape, a substantially semi-elliptical shape (see FIG. 4E), etc. Furthermore, the shape etc. which become narrow like a step may be sufficient.

  Further, it is most preferable that the column piece portion 9 is disposed at the approximate center of the inward curl forming region 7a formed at the lower part or the center line of the column piece portion 9 in the inner overlapping portion 5. Even if it is set within the range from the center of the inward curl formation region 7a to the left and right, it is possible to achieve a corresponding effect in suppressing the curl shape from returning.

Furthermore, the lower end of the column piece portion 9 may be set at the same position as the lower end edge of the blank 10, but may be an upper position.
In this embodiment, as shown in FIG. 4A, a position shorter than the lower end edge of the blank 10 (position spaced upward) is set to a position exceeding half the height of the inward curl formation region 7a. ing.
Even with this shape, curling can be prevented from returning and function as a support to prevent buckling.

Here, in the illustrated example, the length L1 of the inward curl forming portion 7 at the lower end of the blank 10 is 185.63 mm, and the length L2 of the upper portion of the blank 10 is 257.22 mm.
When the lateral width L3 of the inner overlapping portion 5 is 10.5 mm, the length from the lower end of the support piece piece 9 to one end edge portion 11 of the blank 10 is set to 6 mm.

Then, as shown in FIG. 3B, when the contact area of the inward curl formation regions 7a and 7b in the case where the conventional notch portions and support portions are not provided is 32.20 square millimeters, in this embodiment, As shown in FIG. 3A, the contact area of the inward curl formation regions 7a and 7b is 16.43 square millimeters.
The above numerical values are merely examples, and do not limit the configuration of the present invention. Of course, the arrangement and length can be changed as appropriate.

In addition, as a composite container, the structure for hooking the inward curl of the outer sleeve to the concave portion of the container is illustrated, but the connection structure with the container is not limited to the above embodiment, the upper end of the outer sleeve is fixed to the upper part of the container, The inward curl may have a structure that only touches the outer periphery of the body of the container.
In addition, it goes without saying that various design changes can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Composite container 2 Container 2a Concave part 3 Outer sleeve 4 Inward curled part 5 Inner overlapping part 6 Outer overlapping part 7 Inward curl forming part 7a, 7b, 7c Inward curl forming area 8 Notch part or slit 9 Prop piece part 10 Blank 11 One edge 12 The other edge

Claims (6)

And a sheet-like outer sleeve that is externally fitted to the container. The outer sleeve is formed by double-bonding one end and the other end of a fan-shaped blank. In the composite container in which an inwardly curled portion curled toward the center side of the container is formed on the lower end side of the sleeve,
The outer sleeve blank has an inner overlap portion and an outer overlap portion that overlap each other at the edge where the blank was formed at the edge of the blank, and a lateral width with a certain length along the lower end edge of the blank. An inwardly curled portion extending in the direction,
An inward curl forming region formed in the inner overlapping portion is provided with a notch or slit for separating from an adjacent inward curl forming region.   2. The composite container according to claim 1, wherein the strut piece is set to have an area narrower than an inward curl forming region formed in the outer overlapping portion corresponding to the inner overlapping portion.   The composite container according to claim 1, wherein the inward curl forming region formed in the inner overlapping portion and the inward curl forming region formed in the outer overlapping portion are not bonded to each other.   The strut piece portion has a shape that gradually becomes narrower toward the lower end of the blank, and the lower portion of the strut portion is disposed at the approximate center of the inward curl formation region formed in the inner overlapping portion. The composite container according to claim 2, wherein:   The composite container according to any one of claims 1 to 4, wherein the support piece portion has an inverted triangular shape, an inverted ladder shape, a semicircular shape, or a semielliptical shape.   The composite container according to any one of claims 1 to 5, wherein the lower end of the support piece is set at a position spaced above the lower end edge of the blank.

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