JP2004149126A - Square container made of synthetic resin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a label from slacking or getting loose on a square container made of a synthetic resin. <P>SOLUTION: The square container made of a synthetic resin includes a barrel consisting of a pair of principal plane walls oppositely provided at an interval, a pair of side walls oppositely provided across the principal plane walls on both sides, and four corner walls each connecting the principal plane wall and the side wall, wherein a space region surrounded by the side walls and the corner walls serves as a space to be filled with contents. An elongate recess is provided on each corner wall. In addition, at least one beam is provided, which is interposed between the recesses on upper and lower sides and has its end rims connected with the principal plane wall, a rear face wall and the side wall respectively to form the same plane with the corner wall. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rectangular container capable of producing a preform made of a synthetic resin such as polyethylene terephthalate by biaxial stretch blow molding, and particularly to a loose or loose shrink label attached to the body of the container. Is to be surely prevented.
[0002]
[Prior art]
Containers made of synthetic resin such as PET bottles are lightweight and easy to handle, can ensure transparency, and have an appearance comparable to that of glass containers. In recent years, it has been widely used as a container for filling beverages, seasonings, alcoholic beverages, detergents, drugs, and the like because of its low cost.
[0003]
Containers also have a circular cross-section or a square cross-section, etc., and are properly used according to the type of contents to be filled and the capacity of the container. And a label designed to distinguish it from other products.
[0004]
As the label, a shrink label made of polypropylene, polystyrene, or polyethylene terephthalate, which can be easily attached by applying heat without using an adhesive, is applied. When the external shape is deformed due to a load acting in the radial direction of the container due to the loosening or loosening of the corner portion, there is a problem that the label is wrinkled and the commercial value is reduced.
[0005]
The looseness or looseness of the label in the rectangular container is caused by providing a concave portion on the wall surface of the corner in order to secure rigidity against a load applied from the outside of the container. There is known a rectangular plastic bottle in which a cross-sectional shape of a corner portion is formed into a convex curved surface and a paper label is attached thereto through an adhesive (see Patent Document 1).
[0006]
[Patent Document 1]
JP-A-10-175625.
[0007]
By the way, the bottle disclosed in the above publication has a lower cross-sectional shape of the corner portion of the upper body because the cross-sectional shape has a convex curved surface as compared with a rectangular container having a concave portion in the corner portion. It is unavoidable that the upper trunk itself is likely to be deformed when a load that crushes the container is applied.
[0008]
[Problems to be solved by the invention]
It is an object of the present invention to propose a novel container which can be fitted with a label tightly without affecting the rigidity of the container.
[0009]
[Means for Solving the Problems]
The present invention includes a pair of main walls arranged oppositely at intervals, a pair of side walls opposingly arranged with the main wall interposed therebetween, and four corner walls connecting the main wall and the side walls, respectively. A synthetic resin rectangular container having a body portion and having a space region surrounded by these main surface walls, side walls, and corner walls as a space for filling contents, wherein a longitudinally elongated concave portion is provided in each of the corner walls. A synthetic resin square container characterized by being provided with at least one beam which is vertically sandwiched between the concave portions and whose edges are connected to the main surface wall and the side walls and are flush with the corner wall. .
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described more specifically with reference to the drawings.
[0011]
1 to 4 show an embodiment of a rectangular container according to the present invention.
In the figure, reference numerals 1A and 1B denote a pair of main face walls which are opposed to each other at an interval, and 2A and 2B denote a pair of side walls which are opposed to each other with the main face walls 1A and 1B sandwiched on both sides. , 1B and the side walls 2A, 2B, respectively, and the main body walls 1A, 1B, the side walls 2A, 2B, and the corner walls 3A to 3D form the body of the container.
[0012]
Reference numeral 4 denotes an opening for discharging the contents filled in the body of the container, and reference numeral 5 denotes an edge which is connected to each of the main surface walls 1A and 1B and the side walls 2A and 2B and is flush with the corner walls 3A to 3D. And 6 are concave portions provided vertically in the corner walls 3A to 3D with the beam 5 interposed therebetween. The recess 6 is designed to increase the strength of the corner walls 3A to 3D to improve the rigidity in the direction along the axis of the container.
[0013]
Further, reference numeral 7 denotes a waist portion for dividing the body of the container into upper and lower parts to increase rigidity in a radial direction, 8 denotes a decompression absorption panel provided on the main surface walls 1A and 1B, and 9 denotes a side wall 2A and 2B. It is a decompression absorption panel.
[0014]
When a shrink label is attached to the upper body part of the body part bisected by the waist part 7 in the above-described container, the shrink label is supported by the beam 5 on the corner walls 3A to 3D, so that the label is always tight. Is held.
[0015]
In the container shown in FIGS. 1 to 4 described above, the case in which the shrink label is attached to the upper body has been described. However, it is also possible to attach the shrink label to the lower body or the entire body. A beam 5 similar to that provided on the upper body of the container shown in FIGS. 1 to 4 above is provided below or over the entire area of 3A to 3D.
[0016]
The container can be manufactured by applying a biaxial stretch blow molding method to a preform manufactured by injection molding, and the preform can be manufactured by applying an extrusion molding method or a compression molding method. The law is not particularly limited.
[0017]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, a label can be attached in the state which was tight, without reducing the rigidity of a container, and the quality regarding the external appearance of goods is stabilized.
[Brief description of the drawings]
FIG. 1 is a view showing an embodiment of a rectangular container according to the present invention.
FIG. 2 is a diagram showing a side view of FIG. 1;
FIG. 3 is a diagram showing a plane of FIG. 1;
FIG. 4 is a diagram showing a bottom surface of FIG. 1;
[Explanation of symbols]
1A Main surface wall 1B Main surface wall 2A Side wall 2B Side wall 3A-3D Corner wall 4 Mouth 5 Beam 6 Recess 7 Waist 8 Decompression absorption panel 9 Decompression absorption panel

Claims (1)

A main body wall including a pair of main surface walls arranged at an interval facing each other, a pair of side walls arranged opposite to each other with the main surface wall interposed therebetween, and four corner walls respectively connecting the main surface wall and the side wall; A synthetic resin square container having a space region surrounded by these main surface walls, side walls and corner walls as a space for filling contents,
Each of the corner walls is provided with a vertically long concave portion, and at least one beam which is sandwiched between the upper and lower portions and whose edge is connected to each of the main surface wall and the side wall and is coplanar with the corner wall is provided. A rectangular container made of synthetic resin.

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