JP4986436B2 - Synthetic resin bottle-type container with a vacuum absorbing panel - Google Patents

Description

  The present invention relates to a synthetic resin bottle-type container having a vacuum absorption panel on the side wall of a body portion, and intends to further increase the vacuum absorption amount without changing the size of the vacuum absorption panel. is there.

  Synthetic resin bottle-type containers such as plastic bottles are lightweight, easy to handle, and can ensure transparency, so they have an appearance that is comparable to glass containers, and cost-effectively. In recent years, it has been widely used as a container for storing food, beverages, cosmetics, drugs, and the like.

  In addition, this type of container is compatible with products that fill and seal the contents while maintaining a temperature of about 80 to 95 ° C for sterilization, and products that are sterilized and filled at room temperature (aseptic filling). It is also coming out.

  In particular, in a container that is compatible with products that are filled with high temperature or aseptic, when a change in pressure (especially reduced pressure) occurs in the container, a change in shape (change in external shape) is caused by the change. The fuselage is provided with a vacuum absorbing panel that positively causes deflection deformation and stably maintains the external shape of the container.

  By the way, in a conventional container provided with a reduced pressure absorption panel, the inside of the container may be depressurized exceeding the absorption amount of the panel. In this case, the reduced pressure absorption panel cannot absorb the pressure change, and the reduced pressure As a result of inducing deformation of the body wall portion other than the absorbent panel and damaging the external shape of the container, the commercial value is lost.

As prior art regarding this point, at least two recesses for absorbing reduced pressure are provided on the peripheral wall of the container, and grooves (vertical ribs) connected to the recesses are formed between the recesses so that the inside of the container is in a negative pressure state. There has been proposed a plastic container that uniformly disperses deformation in each recess (see, for example, Patent Document 1).
Japanese Patent No. 3608420

  However, the plastic containers such as those described above may be deformed starting from the groove during decompression because the lateral rigidity of the container is impaired, and there is still room for improvement at present. there were.

  An object of the present invention is to propose a new synthetic resin bottle-type container that can secure a sufficient amount of absorption even when the inside of the container is depressurized and does not cause a decrease in lateral rigidity.

The present invention includes an upper body having a mouth portion for pouring contents, and a lower body integrally connected to the upper body via a waist, the upper body and the lower body For each side wall having the same orientation, a plastic resin bottle-type container provided with a reduced pressure absorption panel that deforms the panel wall to prevent deformation of the container accompanying decompression,
In the reduced pressure absorption panel, the edge of the reduced pressure absorption panel is a recess that has a side wall recessed toward the inside of the container , and the reduced pressure absorption panel has at least a part of the edge and the edge toward the waist. The contour part displaced in a convex shape within the width of
The protruding margin of the contour portion is a synthetic resin bottle-type container provided with a reduced pressure absorption panel, characterized in that it is set to a dimension that does not reach the waist .

In the synthetic resin bottle-type container having the above-described configuration, it is preferable that the decompression absorption panels of the upper body portion and the lower body portion are arranged so that the contour portions displaced in a convex shape face each other.

  In addition, the contour shape of the reduced pressure absorption panel may be axisymmetric with respect to the waistline at the upper body portion and the lower body portion.

The edge of the reduced pressure absorption panel is a recess that has a side wall recessed toward the inside of the container, and at least part of the edge is convex within the width of the reduced pressure absorption panel with the edge facing the waist. If the contour portion displaced is provided and the projection margin of the contour portion is set to a dimension that does not reach the waist, the side wall adjacent to the contour portion will bend and deform together with the vacuum absorbing panel. The amount of vacuum absorption increases.

When the contour portion is displaced to the convex alignment opposite one another between the upper body and lower body portions, not only the vacuum panels of each barrel is bending respectively deformed, positioned between the mutually Since the entire portion including the side wall is bent and deformed, a sufficient amount of vacuum absorption is ensured.

Hereinafter, the present invention will be described more specifically with reference to the drawings.
FIG. 1 shows an embodiment of a synthetic resin bottle-type container (such as a plastic bottle) according to the present invention, and FIG. 2 is a cross-sectional view taken along the line AA.

  In the figure, 1 is a mouth part for pouring the contents in the container, 2 is an upper body part, 3 is a waist formed by an annular narrow groove, 4 is a lower body part connected via the waist 3, These are integrally formed by biaxially stretching blow-molding a preform produced by injection molding or the like.

Reference numeral 5 denotes a reduced-pressure absorption panel which is partitioned by a recess 50 serving as an edge of the upper body 2 and includes the recess 50 and a central recess 51 inside thereof . This reduced pressure absorption panel 5 has a contour part 5a in which the corners of the lower edge are displaced in two convex directions toward the waist 3. The protrusion margin t ₁ (see FIG. 1) of the contour portion 5 a is set to a dimension that does not reach the waist 3.

Reference numeral 6 denotes a reduced pressure absorption panel which is partitioned by a recess 60 which is an edge of the side wall of the lower body 4 and includes the recess 60 and a central recess 61 inside the recess 60 . The reduced pressure absorbing panel 6 has a contour portion 6a in which the corner of the upper edge portion is displaced in two convex directions toward the waist 3, and the protrusion allowance t ₂ (see FIG. 1) of the contour portion 6a is also described above. Similar to the contour part 5a, the dimension is set so as not to reach the waist 3.

  In the synthetic resin bottle type container having the above-described configuration, even if the amount of absorption in the reduced pressure absorption panels 5 and 6 reaches the limit, the region located between them takes priority starting from the contour parts 5a and 6a. Therefore, the amount of reduced pressure absorption increases, and the contour portions 5a and 6a do not reach the waist 3, so that there is no shape deformation starting from the groove as in the conventional container, and sufficient lateral rigidity is ensured. be able to.

  In order to make it easier to bend and deform between the vacuum absorbing panels 5 and 6 than in other regions, the contour portions 5a and 6a are arranged to face each other and are symmetrical with respect to the center line of the waist 3. Contour shape.

The contour shape of the vacuum absorbing panels 5 and 6 may be the one shown in FIG. 3 in which contour portions 5b and 6b having two other corners convex are further added , or one central portion between the corners. It may be a convex shape as shown in FIG. Although different from the embodiment of the present invention, the contour portions 5a, 5b, 6a, 6b may be shown in FIG. Further, a concave contour portion may be formed instead of the convex contour portion. In addition, when forming a convex outline part toward the shoulder part of a container like the above-mentioned FIG. 3, it is good to set the protrusion margin to the dimension which does not reach the boundary with a shoulder part.

  It is possible to increase the amount of vacuum absorption without changing the size of the vacuum absorption panel, and it is possible to provide a synthetic resin bottle-type container that does not cause a decrease in lateral rigidity.

It is the figure which showed embodiment of the synthetic resin bottle-shaped container according to this invention. It is the figure which showed the AA cross section of FIG. It is the figure which showed other embodiment of the synthetic resin bottle-shaped containers according to this invention about the vacuum absorption panel. It is the figure shown about the vacuum absorption panel of the synthetic resin bottle type containers . It is the figure which showed other embodiment of the synthetic resin bottle-shaped containers according to this invention about the vacuum absorption panel.

Explanation of symbols

1 mouth part 2 upper trunk part 3 waist 4 lower trunk part 5 decompression absorption panel
5a Contour area 6 Vacuum absorbing panel
6a Contour area
t ₁ protrusion allowance
t ₂ protrusion allowance

Claims (3)

An upper body having a mouth portion for pouring the contents, and a lower body integrally connected to the upper body via a waist, each of the upper body and the lower body being oriented. For the same side wall, it is a synthetic resin bottle type container provided with a reduced pressure absorption panel that deforms the panel wall to prevent deformation of the container due to reduced pressure,
In the reduced pressure absorption panel, the edge of the reduced pressure absorption panel is a recess that has a side wall recessed toward the inside of the container, and the reduced pressure absorption panel has at least a part of the edge and the edge toward the waist. The contour part displaced in a convex shape within the width of
A synthetic resin bottle-type container provided with a reduced pressure absorption panel, characterized in that a protruding margin of the contour portion is set to a dimension that does not reach the waist.   The decompression absorption panel of the said upper trunk | drum and lower trunk | drum is a synthetic resin bottle type | mold provided with the decompression absorption panel of Claim 1 which has arrange | positioned the contour part displaced convexly mutually. container. 3. The synthetic resin bottle-type container provided with the reduced pressure absorption panel according to claim 1, wherein a contour shape of the reduced pressure absorption panel is symmetrical with respect to the upper body portion and the lower body portion with respect to the waistline.
It is.

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