JPH0748491Y2 - Plastic bottle with reinforced ribs - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a plastic bottle with reinforcing ribs, and particularly to a biaxially stretched plastic bottle having a panel portion in the body and a polygonal cross section. Regarding the shape of the rib.

[Prior Art] Conventionally, as a container for liquid food, a plastic bottle having a body formed of a plurality of panel parts and having a polygonal cross section is widely used. This kind of plastic bottle is generally manufactured by blow molding a thermoplastic resin, for example, a parison made of polyethylene terephthalate, and biaxially stretching it.

Further, in order to improve the strength of the body portion of such a plastic bottle, the panel portion of the body portion is provided with a plurality of ribs in a vertical direction, a horizontal direction, or an oblique direction, or a frame-shaped rib. .

[Problems to be solved by the device]

However, it is difficult to obtain the desired strength simply by providing a plurality of ribs in the vertical direction, the horizontal direction, or the diagonal direction on the panel portion of the plastic bottle. For example, a decrease in the ambient temperature after sealing, Owing to the nature of the contents, the oxygen in the sealed container is absorbed by the contents, which may cause the panel part to deform unevenly and impair the appearance when the bottle is in a reduced pressure state. It was

Further, in the case of forming the frame-shaped rib, when the deformation due to the reduced pressure in the bottle becomes large, the stress concentrates on the indefinite portion of the frame-shaped rib, and the portion is bent, etc., and the appearance deteriorates, and further, the contents The capacity may vary.

Therefore, an object of the present invention is to provide a plastic bottle with a reinforcing rib that does not impair the external appearance while allowing the panel portion to be deformed to some extent by the rib having a specific shape.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the plastic bottle with reinforcing ribs of the present invention is a biaxially stretched plastic bottle having at least one panel part in the body part, and at least one surface of the panel part, and some rib sides A frame-shaped rib having a cutout portion is provided, and linear auxiliary ribs longer than the cutout portion are provided substantially parallel to the cutout portion and rib sides on both sides of the cutout portion.

[Action]

As described above, by providing a frame-shaped rib having a missing portion on a part of the rib side on the panel portion, the strength of the panel portion is improved, and the missing portion functions as a margin for allowing deformation, To prevent damage.

Further, the linear auxiliary ribs provided substantially in parallel along the missing portion and the rib sides on both sides of the missing portion prevent extreme deformation, and moreover, in the gap between the missing portion and the rib sides on both sides of the missing portion and the auxiliary rib. As a result of the deformation being dispersed, the entire plastic bottle is prevented from being unsightly deformed.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show a first embodiment of the present invention.
FIG. 1 is a front view of a plastic bottle with a reinforcing rib, and FIG. 2 is a sectional view taken along line II-II of FIG.

The plastic bottle 1 is a rectangular container manufactured by blow molding a thermoplastic synthetic resin parison, and a body portion 2 of the bottle 1 is formed by connecting eight panel portions 3 and has a cross-sectional shape. Has an octagonal shape.

The rib 4 is provided on one panel portion 3 having a large surface area among the eight panel portions 3.

The rib 4 is formed by a groove that bulges inside the plastic bottle 1.
Frame-shaped ribs 5 each having a missing portion 6 in a and 5b, linear auxiliary ribs 7a and 7b provided above and below the inner portion surrounded by the frame-shaped ribs 5, frame-shaped ribs 5 and auxiliary The vertical ribs 8a and 8b are formed in the inner portion surrounded by the ribs 7a and 7b.

The auxiliary ribs 7a and 7b are formed longer than the length of the missing portion 6, and the missing portion 6 and the rib sides 5 on both sides of the missing portion 6 are formed.
They are provided substantially parallel to each other along a and 5b.

In the plastic bottle 1 thus formed, the frame-shaped ribs 5 improve the strength against deformation under reduced pressure, and the deformation is allowed at the cutout portions 6 to prevent the plastic bottle 1 from being deformed unsightly.

Further, the auxiliary ribs 7a and 7b prevent extreme deformation, and further, the missing portion 6 and the rib sides 5a and 5b on both sides of the missing portion and the auxiliary rib 7 are provided.
Dispersion of deformation in the gap between a and 7b prevents the appearance of the plastic bottle 1 from being damaged.

3 and 4 show a second embodiment of the present invention,
FIG. 3 is a front view of a plastic bottle with a reinforcing rib, and FIG. 4 is a sectional view taken along line IV-IV of FIG.

The body portion 21 of the plastic bottle 20 is formed by connecting the panel portion 22 and the curved outer peripheral surface 23, and the panel portion 22 is provided with ribs 24.

The rib 24 includes a frame-shaped rib 25 having a cutout portion 26 on the upper and lower rib sides 25a and 25b, and linear auxiliary ribs 27a and 27b provided above and below the outer portion of the frame-shaped rib 5, respectively.
It consists of and.

The auxiliary ribs 27a, 27b are formed longer than the length of the missing portion 26, and the missing portions 26 and rib sides on both sides of the missing portions 26 are formed.
They are provided substantially parallel to each other along 25a and 25b.

FIG. 5 is a perspective view showing a third embodiment of the present invention.

The body portion 31 of the plastic bottle 30 is formed by connecting four panel portions 32, and has a quadrangular cross section.

The rib 34 is formed on one of the four panel portions 32 having a large surface area.

The rib 34 is composed of a frame-shaped rib 35 having a cutout portion 36 on the lower rib side 35a, and a frame-shaped auxiliary rib 37 provided on an inner portion of the frame-shaped rib 5.

The frame-shaped auxiliary ribs 37 are rib sides 37a, 37b on the left and right sides.
The lower linear rib sides 37c each having a missing portion 38 and formed to be longer than the length of the missing portion 36 are provided substantially parallel to the missing portion 36 and the rib sides 35a on both sides of the missing portion. ing.

In addition, linear rib sides 35b, 35 on both left and right sides of the frame-shaped rib 35
The c functions as a reinforcing rib for the left and right missing portions 38 of the frame-shaped auxiliary rib 37.

The shape of the rib of the present invention is not limited to the shape of each of the above-described embodiments, and a frame-shaped rib having a missing portion on a part of the rib side and a rib longer than the missing portion and on both sides of the missing portion and the missing portion. Any other rib may be combined as long as it has a linear auxiliary rib provided substantially parallel to the rib side, and each rib may be provided in any arrangement. .

[Effect of device]

As described above, the plastic bottle with reinforcing ribs of the present invention is provided with a frame-shaped rib having a cutout portion on a part of the rib side on at least one surface of the panel portion, and has a linear shape longer than the cutout portion. By providing the auxiliary ribs substantially in parallel along the ribs on both sides of the missing portion and the missing portion, the strength of the panel can be improved, and the missing portion functions as a margin to allow deformation and stress. This prevents the appearance of the plastic bottle from being impaired due to the fact that it concentrates on undefined points.

Further, the linear auxiliary ribs provided substantially in parallel along the missing portion and the rib sides on both sides of the missing portion prevent extreme deformation, and moreover, in the gap between the missing portion and the rib sides on both sides of the missing portion and the auxiliary rib. As a result of the deformation being dispersed, it is possible to prevent the entire plastic bottle from being unsightly deformed.

Further, since the panel portion is prevented from being unevenly deformed, it is possible to reduce variations in capacitance.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention. FIG. 1 is a front view of a plastic bottle with a reinforcing rib, and FIG.
Fig. 1 is a sectional view taken along line II-II of Fig. 1, Figs. 3 and 4 show a second embodiment of the present invention, Fig. 3 is a front view of a plastic bottle with reinforcing ribs, and Fig. 4 is FIG. 3 is a sectional view taken along line IV-IV, and FIG. 5 is a perspective view showing a third embodiment of the present invention. 1,20,30 …… Plastic bottles, 2,21,31 …… Body, 3,
22,32 …… Panel section, 4,24,34 …… Ribs, 5,25,35 …… Frame-shaped ribs, 5a, 5b, 24a, 25b, 35a …… Rib sides with missing portions, 6,26, 36 …… Missing part, 7a, 7b, 27a, 27b, 37 …… Auxiliary rib

Claims (1)

[Scope of utility model registration request] 1. A biaxially stretched plastic bottle having at least one panel portion in a body portion, wherein at least one surface of the panel portion is provided with a frame-shaped rib having a cutout portion on a part of a rib side, and the lacking portion is provided. A plastic bottle with a reinforcing rib, characterized in that linear auxiliary ribs longer than the portion are provided substantially in parallel along the missing portion and the rib sides on both sides of the missing portion.