JP4188132B2 - Synthetic resin bottle type container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin bottle-type container such as a PET bottle formed by biaxial stretch blow molding or the like, and includes deformation, particularly gripping force, that occurs when the contents are poured out by holding the container. In addition to preventing crushing deformation (permanent deformation) that cannot be restored even if the crushing is removed, it is intended to easily restore the shape even when crushing deformation occurs.
[0002]
[Prior art]
Containers made of synthetic resin such as PET bottles can be produced in large quantities relatively easily by applying the biaxial stretch blow molding method, and are easier to handle than glass containers. Since it is possible to reduce the cost, it is frequently used as a container for filling beverages and the like.
[0003]
This type of container is designed to maintain its predetermined shape while minimizing the amount of resin used, and to improve the rigidity of its outer surface so that the container will not buckle when an external load is applied. Various irregularities, such as vertical ribs, horizontal ribs, and waists, have been added. As a prior art in this regard, a flat wall with a wide width having a vacuum absorbing panel wall portion is formed on the body portion having a bottomed cylindrical shape. In addition, a circumferential groove is provided in a form connected to the edge of the flat wall, and a taper wall and a bottom wall extending outward from the center part of the edge of the flat wall to the groove bottom wall of the opposed circumferential groove There has been known a housing having a structure in which a lateral rib-like rib strip is projected at the center of the bottom wall of the recess including the groove bottom wall (for example, see Patent Document 1).
[0004]
[Patent Document 1]
Utility Model Registration No. 2585264 Publication
By the way, in recent years, large containers having a filling capacity of 2 liters or more have been used, and attempts have been made to further improve the strength while reducing the amount of resin used. However, it is common for large containers to hold the barrel and pour out the contents, and the weight-reduced containers that reduce the amount of resin used have the disadvantage that the gripping part deforms relatively easily. It was.
[0006]
Especially for containers with a square cross section with multiple wall surfaces, the ridgeline formed by the vertical wall surfaces that make up the body of the container body and the inclined wall surfaces that make up the shoulders and waists has some degree of rigidity. However, the deformation of the gripping part of the container is suppressed by the rigidity of the ridge line part. It was.
[0007]
Such crushing deformation is difficult to restore, and even if it can be restored, there is a problem that a broken line remains and deteriorates the appearance quality.
[0008]
[Problems to be solved by the invention]
The problem of the present invention is to ensure the rigidity at the ridge line portion formed by the vertical wall surface body and the inclined wall surface body, such as the boundary region between the body and the shoulder portion or the waist of the container, and cause deterioration of the appearance quality. The present invention proposes a novel bottle-type container that can prevent the deformation and become easily reconstructable against the deformation.
[0009]
[Means for Solving the Problems]
The present invention is a synthetic resin bottle-type container comprising a plurality of wall bodies, connecting the end portions of each wall body to each other to form a shoulder portion, a trunk portion and a bottom portion,
Among the ridge lines formed by the end portions of each wall surface, at least a narrow groove extending along the ridge line is provided on a ridge line that connects a wall surface body that forms a vertical surface and a wall surface body that forms an inclined surface. This is a characteristic synthetic resin bottle-type container.
[0010]
It is desirable that the ridge lines are formed substantially in parallel along the periphery of the body portion.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described more specifically with reference to the drawings.
[0012]
1 to 4 show an embodiment of the present invention using a polyethylene terephthalate heat-resistant bottle-shaped container (filling capacity 2.0 liters) having a substantially rectangular cross section formed by applying a biaxial stretch blow molding method as an example. 1 is a front view, FIG. 2 is a side view, FIG. 3 is a plan view, and FIG. 4 is a bottom view.
[0013]
In the figure, reference numeral 1 denotes a body portion of the container. This body portion 1 has a vacuum absorbing panel and a pair of short side wall bodies 1b that form a vertical surface as well as a pair of long side wall bodies 1a that form a vertical surface of the container, and these long side wall bodies 1a and short side wall surfaces. It consists of a corner wall 1c connecting the body 1b.
[0014]
Reference numeral 2 denotes a shoulder provided at the upper end of the body portion 1. The shoulder 2 is composed of a plurality of wall surfaces 2a forming an inclined surface.
[0015]
3 is a thermally crystallized mouth connected to the shoulder 2, 4 is a heel part provided at the lower end of the body part 1, 5 is a bottom wall connected to the heel part 4, and 6 is a body part 1 divided into two The waist portion is a waist portion for improving the rigidity of the body portion, and the waist portion 6 has a wall surface body 6a connected to the groove bottom by forming an inclination.
[0016]
7 is a narrow groove extending along the ridgelines L ₁ and L ₂ that connect the wall surface bodies 1a and 1b forming the vertical surface and the wall surface bodies 2a and 6a forming the inclined surfaces, respectively. The narrow groove 7 has a cross section as shown in FIG. 5, thereby increasing the rigidity of the portion.
[0017]
In a thin-walled (light weight) bottle-type container having a filling capacity of 2.0 liters or more, the gripping part portion is used when the contents are poured out by grasping the body part 1 of the container. Is deformed and a force exceeding the strength of the ridgeline existing in the vicinity thereof is applied, the ridgeline part will be crushed and unrecoverable, but the container according to the present invention, Since the narrow grooves 7 along the ridgelines L ₁ and L ₂ are provided, the rigidity of the portion is improved, and even when a somewhat large gripping force is applied when the contents are poured out, the crushing deformation does not easily occur. Even if crushing deformation occurs, the shape can be easily restored, and no broken line remains.
[0018]
When the ridge line 7 is provided along the axis of the container (longitudinal direction), it is effective in improving the buckling strength. From the viewpoint of increasing the rigidity against deformation when the container is gripped, Is provided immediately above the ridgeline formed substantially in parallel with each other.
[0019]
The container according to the present invention is not limited to the container having a substantially rectangular cross section as shown in FIGS. 1 to 4, but can be applied to a container having a substantially square or polygonal cross section.
[0020]
Moreover, the filling capacity of the contents can be applied to a container having a capacity of 2.0 liters or more, and may be applied to a container having a capacity of less than 2.0 liters, such as 350 ml or 500 ml.
[0021]
【The invention's effect】
According to the present invention, it is possible to reliably prevent crushing deformation of the ridge line portion, which has been a concern when the contents are poured out while grasping the container, and to easily shape the crushing deformation. It can be restored, and the appearance quality of the container can be stabilized.
[Brief description of the drawings]
FIG. 1 is a view showing an embodiment of a synthetic resin bottle-type container according to the present invention.
FIG. 2 is a view showing a side surface of FIG. 1;
FIG. 3 is a diagram showing a plan view of FIG. 1;
4 is a view showing a bottom surface of FIG. 1;
FIG. 5 is a diagram showing a cross-sectional shape of a narrow groove.

Claims (2)

A bottle-shaped container made of synthetic resin comprising a plurality of wall bodies, connecting the end portions of each wall body to each other, and forming a shoulder, a trunk portion and a bottom portion,
Among the ridge lines formed by the end portions of each wall surface, at least a narrow groove extending along the ridge line is provided on a ridge line that connects a wall surface body that forms a vertical surface and a wall surface body that forms an inclined surface. Characteristic synthetic resin bottle type container. The bottle-shaped container according to claim 1, wherein the ridge line is formed substantially in parallel along the periphery of the body portion.

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