JP3326477B2 - Resin bottle container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bottle made of resin and, more particularly, to a sectional shape of a body portion thereof.

[0002]

2. Description of the Related Art In general, the cross section of the body of a resin bottle container is substantially circular. If the contents of this bottle are filled at a high temperature and then stored at normal or low temperature, the inside of the container may be decompressed and the body of the bottle may be partially dented. It is not at all predictable which part of the torso will deform.

[0003] By the way, in general, the body of a resin bottle container is directly printed with a product name, a picture or the like on the front side thereof,
Alternatively, a shrink label on which these are printed is attached. Then, when selling, etc., the display is made so that the consumer looks at the front of the bottle container.

[0004]

However, in the case of a conventional bottle container, when the pressure is reduced, the front side of the body may be deformed by the reduced pressure. If so, the product name becomes difficult to read or the appearance is deteriorated. Will be impaired.

[0005] The present invention has been made in view of such problems of the prior art, and an object of the present invention is to provide a resin bottle container capable of specifying a portion which is deformed when the pressure inside the container is reduced.

[0006]

The present invention has the following features to attain the object mentioned above. That is, the resin bottle container of the present invention has a body having a substantially cylindrical cross section, and at least one region along the axial direction of the body is a deformable region. The cross-sectional outer shape in the deformable region is such that the radius of curvature on the back side is larger than the radius of curvature on the front side, and the center of the curvature circle on the back side is located on the front side of the center of the curvature circle on the front side. Further, the back side and the front side were connected by a circumscribed circle circumscribing the front side and an inscribed circle common to both the circumscribed circle and the back side.

When the center of the circumscribed circle is located on the front side with respect to the center of the curvature circle on the front side, the rear side does not protrude when the bottle container is viewed from the front, and the appearance is good and preferable.

When the radius of curvature on the front side is R ₁ , the radius of curvature on the back side is R ₂ , the radius of the circumscribed circle is R ₃ , and the radius of the inscribed circle is R ₄ , When the magnitude relation is set so as to satisfy the following equation, the appearance is almost the same as a perfect circle, and the appearance is clear and preferable. In that case, it is more preferable that R _{2 be} at least twice as large as R ₁ .

R ₂ > R ₃ > R ₁ > R ₄

When a substantially circular round body having a radius equal to or greater than the radius of curvature on the front side of the deformable area is formed on both sides of the deformable area in the body, a bottle container excellent in line can be obtained. It is preferable.

A typical example of the resin material of these resin bottle containers is polyethylene terephthalate. However, it is not limited to this resin.

[0012]

In the deformable region of the body, the back side has a larger radius of curvature than the front side, so that the strength against pressure reduction inside the container is lower on the back side than on the front side. Therefore, when the inside of the container is depressurized, the rear side becomes concave before the front side. That is, the deformed portion of the trunk at the time of decompression can be specified on the back side of the deformable region.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 2 is an overall side view of a resin bottle container (hereinafter abbreviated as a bottle container) 1 according to the present invention before deformation, FIG. 3 is a rear view of the same, and FIG.
It is sectional drawing.

The bottle container 1 of the present embodiment is made of polyethylene terephthalate, and a barrel 3 is connected to the upper end of a substantially cylindrical body 2, and the tip of the barrel 3 is opened as a spout 4.

The upper and lower portions of the body 2 are round bodies 5 and 6 having a substantially circular cross section.
The deformable area A has a diameter smaller than that of the deformable area A. By providing the round body portions 5 and 6 on the upper and lower sides in this manner, the bottle container 1 is unlikely to fall even when the bottle container 1 is pressed against each other in an upright posture, so that the line is excellently suitable.

FIG. 1 shows a cross section in the deformable area A. In this figure, the outer surface is represented by a single solid line with the thickness of the body 2 omitted. A surface (hereinafter, referred to as a surface) from the front B side to both sides of the body 2 in the deformable region A
This is called a front-side surface) 11 has an arc shape made of a radius of curvature R _1. The center of the curvature circle of the front surface 11 is located concentrically with the center O ₁ of the round body portions 5 and 6, and the curvature radius R ₁ is slightly larger than the outer radius R ₅ of the round body portions 5 and 6. It has a small diameter.

On the other hand, the back side surface 12 of the body 2 in the deformable area A is formed in an arc shape having a radius of curvature R _{2, and} from the center O ₁ of the round body 5, 6 to the center of the back side surface 12. The distance to 12a is determined by the radius of curvature R ₁ of the front surface 11.
The dimension H is smaller than R (R ₁ > H). The radius of curvature R ₂ of the rear side surface 12 have been doubled or more dimensions of the radius of curvature R ₁ of the front surface 11 (R _2> 2
R ₁ ), the center O _{2 of the} curvature circle of the rear surface 12 is further eccentric to the front B side than the front surface 11.

Further, a front surface 11 and a rear surface 12
Are smoothly connected by a circumscribed circle circumscribing the front surface 11 and an inscribed circle common to the circumscribed circle and the rear surface 12. Hereinafter, these connection portions are referred to as a circumscribed circle portion 13 and an inscribed circle portion 14, respectively.

The radius of curvature R ₃ of the circumscribed circle portion 13 is set to be larger than the radius of curvature R ₁ of the front surface 11 and smaller than the radius of curvature R ₂ of the back surface 12. The center O ₃ of the curvature circle is located on the front B side of the center O _{1 of the} curvature circle on the front surface 11. or,
The radius of curvature R ₄ of the inscribed circle portion 14 is smaller than the radius of curvature R ₁ of the front surface 11.

That is, the radius of curvature R ₁ of the front surface 11 is:
Radius of curvature R ₂ of the rear side surface 12, the radius of curvature R ₃ of the circumscribed circle portion 13, the magnitude relationship between the radius of curvature R ₄ of the inscribed circle portion 14 is as follows.

R ₂ > R ₃ > R ₁ > R ₄

In the bottle container 1 having the above structure, the circumscribed circle portion 13 does not protrude when the bottle container 1 is viewed from the front, and the body 2 of the deformable area A is apparently viewed from any direction. Looks almost circular and looks good.

When the pressure in the bottle container 1 is reduced,
The rear side surface 12 of the body 2 in the deformable area A is deformed first and dented inward, and the front side surface 11 and the circumscribed circle portion 13 maintain their shapes before decompression without being deformed.

FIG. 4 is a cross-sectional view of the body 2 in the deformable region of the bottle container 1 thus deformed. Thus the front surface 11 and a circumscribed circle portion 13 is not deformed, the only back-side surface 12 is deformed, the radius of curvature R ₁ and a circumscribed circle of the radius of curvature R ₂ is a front side surface 11 of the rear side surface 12 nothing but to because greater than the radius of curvature R ₃ of the portion 13.

When the pressure in the bottle container 1 further decreases and cannot be absorbed only by the deformation of the rear surface 12, the circumscribed circle portion 13 is deformed and dented, and the front surface 11 is decompressed without being deformed. Maintain the previous shape. Therefore, even at this time, the bottle container 1 does not appear to be deformed when viewed from the front. Thus the circumscribed circle portion 13 without the front-side surface 11 is deformed is deformed, the radius of curvature R ₃ of the circumscribed circle portion 13 is nothing but to because greater than the radius of curvature R ₁ of the front surface 11.

Therefore, in this bottle container 1, if the front surface 11 of the deformable area A in the body 2 is directly printed or a shrink label is attached so that the printed portion is located on the front side, the bottle container 1 Since the front side surface 11 is not deformed even if the inside of the bottle 1 is decompressed, the bottle container 1 appears to be not deformed when viewed from the front, and the printed letters and patterns are not distorted and look very beautiful. , The commercial value will not be lost.

In this embodiment, the bottle container 1 having no handle is described. However, the present invention can be applied to the cross-sectional shape of the body of the bottle container having the handle. In this case, since the handle attachment portion is not generally cylindrical, the cross-sectional shape of the present invention may be adopted for a substantially cylindrical portion excluding the handle attachment portion.

[0028]

As described above, according to the present invention,
When the bottle container decompresses, only the back side is deformed,
The front side can be prevented from being deformed, so that the appearance of the bottle container at the time of display or the like is improved, and an excellent effect that the commercial value can be enhanced is exhibited.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a trunk portion of a deformable region of a resin bottle container according to the present invention before deformation (a cross-sectional view taken along line II of FIG. 2).
It is.

FIG. 2 is an overall side view of the bottle container before deformation.

FIG. 3 is an overall rear view of the bottle container before deformation.

FIG. 4 is a cross-sectional view of a body portion of a deformable region after deformation of the bottle container.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Resin bottle container 2 Body 5, 6 Round body 11 Front side surface 12 Back side surface 13 Circumscribed circle part 14 Inscribed circle part A Deformable area B Front C Back O ₁ Center of curvature circle on front side O ₂ Back Center of curvature circle on the side O ₃ center of circumscribed circle R ₁ radius of curvature on the front side R ₂ radius of curvature on the back side R ₃ radius of circumscribed circle R ₄ radius of inscribed circle

Claims (6)

(57) [Claims] 1. A body having a substantially cylindrical cross-section, at least one area along the axial direction of the body serving as a deformable area, and a radius of curvature of a rear side of a cross-sectional outer shape in the deformable area. Is larger than the radius of curvature of the front side, and the center of the curvature circle on the back side is located on the front side of the center of the curvature circle on the front side, and the back side and the front side are the front side. A resin circumscribed circle circumscribing the circumscribed circle and an inscribed circle common to both the circumscribed circle and the back side. 2. The resin bottle container according to claim 1, wherein the center of the circumscribed circle is located on the front side of the center of the curvature circle on the front side. 3. The radius of curvature of the front side is R ₁ , the radius of curvature of the back side is R ₂ , the radius of the circumscribed circle is R ₃ , and the radius of the inscribed circle is R _4. 3. The resin bottle container according to claim 1, wherein the magnitude relation is set so as to satisfy the following expression. _{R 2> R 3> R 1} > R 4 4. A resin bottle according to claim 3, characterized in that the radius of curvature R ₂ of the rear side is more than twice the radius of curvature R ₁ of the front side. 5. A substantially circular round body having a radius equal to or larger than a radius of curvature on the front side of the deformable area is formed on both sides of the deformable area in the body. Item 5. The resin bottle container according to any one of Items 1 to 4. 6. The resin bottle container according to claim 1, wherein the resin material is polyethylene terephthalate.