JP2605518Y2 - Bottle container bottom structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to the structure of the bottom of a bottle container.

[0002]

2. Description of the Related Art In recent years, so-called PET bottles made of polyethylene terephthalate have been frequently used as containers for storing liquid foods and the like. In this PET bottle,
Make sure that the bottom is not deformed and the sitting is not bad, or
The bottom is reinforced so that the bottom is not damaged by dropping or the like and the commercial value is not lost. It is for this reason that a concave spherical surface concaved inward is formed at the bottom of the PET bottle.

When the diameter of a PET bottle is small, the provision of a concave spherical surface is sufficient to reinforce the bottom portion, but when the diameter is large, the strength alone is insufficient. Therefore, in such a case, as shown in FIG. 5, a rib 12 having an uneven shape is further provided radially from the center of the concave spherical surface 11 in the concave spherical surface 11 of the bottom portion 10 of the PET bottle.

[0004]

When the bottom of the PET bottle has such a structure, the rigidity can be extremely increased, and the intended purpose can be achieved. However, since the rigidity is too high, the used empty PET
When disposing of the bottle, there is a problem that the bottom cannot be crushed. PET bottles whose bottoms are not crushed are bulky and hinder transportation and storage.

[0005] The present invention has been made in view of such problems of the prior art, and can simultaneously solve the contradictory problems of sufficient reinforcement of the bottom and easy crushing at the time of disposal. An object is to provide a bottom structure of a bottle container.

[0006]

In order to solve the above-mentioned problems, the present invention employs the following configuration. That is, at the bottom of the bottle container according to the present invention, (a) a ball
A concave surface that is concave in a planar shape, and (b) a rib that surrounds the concave surface.
(C) recessed inward of the bottle container and connected in one direction across the concave surface and the flat portion.
A continuously extending groove is provided.

[0007] The cross-sectional shape of the groove can be V-shaped, for example. However, it is not limited to this shape. The bottle container can be formed of, for example, polyethylene terephthalate to be a so-called PET bottle.

[0008]

The bottom of the bottle has not only a concave surface but also a groove, so that the reinforcement against deformation and damage is sufficient. Even if the contents are filled into the bottle container at a high temperature, no problem occurs. Since this groove is formed along one direction crossing the concave portion, when a force is applied in a direction perpendicular to the longitudinal direction of the groove, the groove induces crushing of the bottle container, and the groove forms the bottle container. The bottom is bent further so as to enter inward.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 3 is a front view of a PET bottle (bottle container) 1 made of polyethylene terephthalate, FIG. 4 is a side view thereof, FIG. 2 is a bottom view thereof, and FIG. It is.

The PET bottle 1 has an accommodating portion 2 having a substantially rectangular cross section for accommodating contents such as liquid food and the like, and a pouring portion 3 to which a cap (not shown) is attached. The present invention is applied to the bottom part 4 of the housing part 2. The structure of the part other than the bottom part 4 is not different from that of the conventional PET bottle, so that the description is omitted.

[0011] The bottom portion 4, a concave portion (concave surface) 6 recessed spherically to center formed <br/> above the bottom 4, the concave portion 6
Plane part 5 formed in a ring shape in plan view so as to surround
And a single groove 7 continuously and linearly formed over the flat portion 5 and the concave portion 6.

As shown in FIG. 2, the groove 7 extends from the left end of the flat part 5 to the right end of the flat part 5 across the concave part 6 and divides the flat part 5 and the concave part 6 into two equal parts. It is arranged in. The cross-sectional shape of the groove 7 is substantially inverted V-shape, and the upper surface 7a
Are formed flat. The upper surface 7 a has a minimum width at both left and right ends of the groove 7, gradually increases as approaching the center of the concave portion 6, and has a maximum width at the center of the concave portion 6.

As for the depth of the groove 7, the depth of the groove 7 in the concave portion 6 is fixed and the depth of the groove 7 in the flat portion 5 is fixed. The depth of the groove 7 is larger than the depth of the groove 7 in the concave portion 6 (see FIG. 3).

In the PET bottle 1, since the groove 7 is formed in the bottom portion 4 in addition to the concave portion 6, the rigidity is higher than that of the bottom portion having no groove 7 and having only the concave portion 6. Also concave
Since the part 6 is spherical, impact from all directions is possible.
It has the rigidity to withstand a strike. Therefore, it is possible to prevent the bottom portion 4 from being deformed to make it difficult to sit down, or the bottom portion 4 from being damaged due to a fall or the like, thereby impairing the commercial value. Even if the PET bottle 1 is filled with the contents at a high temperature, no problem occurs in the bottom 4.

On the other hand, when the used empty PET bottle 1 is to be discarded, a direction perpendicular to the longitudinal direction of the groove 7 (the direction of arrow B in FIGS. 1 and 2) is provided on the bottom 4 of the PET bottle 1. When the force is applied from the groove 7, the groove 7 induces the crush of the bottom portion 4, and the groove 7 is further moved inward of the accommodation portion 2 (FIGS. 1, 3 and 4).
At the bottom), the bottom 4 is bent.

Accordingly, the bottom 4 of the PET bottle 1 can be crushed. As a result, waste PET
The storage space of the bottle can be smaller than before,
This is advantageous in performing disposal, such that a larger amount of waste PET bottles can be transported at one time than in the past.

[0017]

[Effects of the Invention] As described above, according to the present invention,
At the bottom of the bottle container, a concave surface, a flat surface, and these concave surfaces
By providing the groove extending in one direction across the plane portion, the rigidity of the bottom portion is increased, the deformation and damage of the bottom portion can be prevented, and the bottom portion is pushed by a force from a predetermined direction. An excellent effect of being crushed is exhibited.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a bottom portion of the bottle container according to the present invention, which is an enlarged cross-sectional view taken along the arrow A of FIG.

FIG. 2 is a bottom view of the bottle container according to the present invention.

FIG. 3 is a front view of the bottle container according to the present invention.

FIG. 4 is a side view of the bottle container according to the present invention.

FIG. 5 is a bottom view of a conventional bottle container.

[Description of Signs] 1 PET bottle (bottle container) 4 Bottom 6 Concave surface (concave surface) 7 Groove

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-21333 (JP, A) Description of the specification and drawings attached to the application for Japanese Utility Model Application No. 3-48331 (Japanese Utility Model Application No. 4-132018). Micro-films (JP, U)

Claims (2)

(57) [Scope of request for utility model registration] 1. A structure of the bottom of the bottle, in this bottom, a concave recessed spherically inwardly of the bottle container, the
A flat portion formed in a ring shape so as to surround the concave surface,
A bottom structure for a bottle container, wherein the groove is formed inwardly of the bottle container, and the groove and the groove continuously extending in one direction across the plane portion are formed. 2. The bottom structure of a bottle container according to claim 1, wherein the bottom structure is made of polyethylene terephthalate.