JP2007119010A - Synthetic resin bottle shaped container with decompression absorption panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a synthetic resin bottle shaped container with an increased decompression absorption. <P>SOLUTION: This relates to a synthetic resin bottle shaped container provided with a top barrel part 2 with a mouth part for discharging a content, a bottom barrel part 4 integrally connected to the barrel part 2 through a waist 3 and decompression absorption panels 5, 6 mounted on the side wall of each barrel part 2 and barrel part 4 facing the same direction for preventing the container from being decompression deformed by flexurally deforming a panel wall. The panels 5, 6 are provided at least partially with a borderline formed by either protruding or receding its edge for displacement. <P>COPYRIGHT: (C)2007,JPO&INPIT

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 PET bottles are lightweight, easy to handle, and can secure 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 corresponding to a product that is filled with high temperature or aseptic filling, when a pressure change (especially reduced pressure) occurs in the container, the shape change (change in appearance shape) is caused by the change. The body is provided with a vacuum absorbing panel that positively causes deformation of the body 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 deteriorating 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,
The reduced-pressure absorption panel is a synthetic resin bottle-type container provided with a reduced-pressure absorption panel, characterized in that it has a contour line in which at least a part of an edge thereof is displaced in a convex shape or a concave shape.

  In the synthetic resin bottle-shaped container having the above-described configuration, it is preferable that the decompression absorbing panels of the upper body part and the lower body part are arranged so that the contour lines displaced in a convex shape or a concave shape face each other.

  In addition, the contour shape of the reduced pressure absorption panel is preferably symmetrical with respect to the upper body portion and the lower body portion with respect to the waistline.

  If it has a contour line in which at least a part of the edge of the vacuum absorbing panel is displaced convexly or concavely, the side wall adjacent to that part will bend and deform together with the vacuum absorbing panel, and the vacuum absorption will increase. .

  When the convex or concavely displaced contour parts are opposed to each other between the upper body part and the lower body part, not only the vacuum absorption panels of each body part are flexibly deformed, but also between them. Since the entire portion including the side wall located at 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 through 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 decompression absorption panel that is partitioned by providing a recess in the side wall of the upper body 2. 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 that is partitioned by providing a recess in the side wall of the lower body 4. This reduced pressure absorption 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 decompression absorption panels 5 and 6 may be the one shown in FIG. 3 in which contour portions 5b and 6b having two other corners are convex, and the contour portions 5a, 5b, 6a and 6b. As shown in FIG. Further, the contour portion may be convex as shown in FIG. 5 at one central portion between the corners, and this point is not particularly limited. A concave contour portion may be formed instead of the 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 which showed other embodiment of the synthetic resin bottle-shaped containers according to this invention about the vacuum absorption panel. 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 portion having a mouth portion for pouring the contents, and a lower body portion integrally connected to the upper body portion via a waist, each of the upper body portion and the lower body portion 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,
The said reduced pressure absorption panel consists of the outline which displaced at least one part of the edge part to convex shape or concave shape, The synthetic resin bottle-type container provided with the vacuum absorption panel characterized by the above-mentioned.   The reduced pressure absorption panels of the upper body part and the lower body part are made of a synthetic resin provided with the reduced pressure absorption panel according to claim 1, wherein the contour parts displaced in a convex shape or a concave shape are arranged facing each other. Bottle type container. 3. The synthetic resin bottle-type container having a reduced pressure absorption panel according to claim 1, wherein a contour shape of the reduced pressure absorption panel is axisymmetric between an upper body portion and a lower body portion with respect to a waist line.

Images