JP3326476B2 - 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 first resin bottle container of the present invention has a body part having a substantially cylindrical cross section, and at least one area along the axial direction of the body part is a deformable area. 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. I have. The rear side may be a flat surface, which can be considered as a case where the radius of curvature on the rear side is infinite.

[0007] If the back side and the front side in the deformable area are connected by an inscribed circle common to both sides, smoothness and appearance are improved. In this resin bottle container,
Reinforcing rib grooves may be provided in portions of the body located on both sides of the deformable region. In that case, it is preferable to make the center of the rear surface in the deformable region substantially flush with the bottom surface of the reinforcing rib groove, because the appearance can be beautiful both before and after deformation.

Further, the second resin bottle container of the present invention comprises:
The rear surface side of the cross-sectional outer shape in the deformable region is formed in a concave shape. It is preferable that the radius of curvature of the concave rear surface is larger than the radius of curvature of the front surface in the deformable region.

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

[0010]

In the deformable region of the body, the rear side has a larger radius of curvature than the front side or is formed in a concave shape, so that the strength against decompression inside the container is lower on the rear side than on the front side. become weak.

Therefore, when the inside of the container is depressurized, the rear side is recessed 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.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 3 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. 4 is a rear view of the same, and FIG.
FIG. 2 is a sectional view taken along the line II-II of FIG.

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

Reinforcing rib grooves 5 and 6 are formed in the upper and lower parts of the body 2 in a C-shape except for the back side, and the upper part of the reinforcing rib groove 5 has a semicircle whose front half is substantially semicircular. The lower part of the reinforcing rib groove 6 is a round body 8 having a substantially circular cross section. Outer radius of curvature and a round body portion 8 of the front surface of Hanmarudo portion 7 is in the same dimension R _4.

On the back side of the reinforcing rib groove 5, a handle mounting recess 9 is provided.
A handle 10 formed separately from the body 2 is fitted and fixed in the mounting recess 9. The handle 10 is dimensioned so that it does not protrude from the round body 8 when viewed from above. Therefore, even when the standing bottle container 1 is in a pressed state, it is difficult to fall down, and the line is excellently suitable.

In the body 2, a region from the upper part of the reinforcing rib groove 6 to the lower part of the mounting recess 9 is a deformable region A. 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 11 (hereinafter, referred to as a front surface) of the body portion 2 in the deformable region A from the front B side to both side portions has an arc shape having a radius of curvature R ₁ . The center of the curvature circle of the front surface 11 is the circular body 8
Is located concentrically with the center O _1, and the radius of curvature R ₁ is slightly smaller than the outer radius R ₄ of the round body 8.

On the other hand, the back surface 12 of the body 2 in the deformable area A has an arc shape having a radius of curvature R ₂ . The rear side surface 12 is shifted toward the front side B by the depth of the reinforcing rib groove 5 at the central portion 12 a thereof, and is flush with the bottom surface of the reinforcing rib groove 5. The radius of curvature R ₂ of the back surface 12 is the same as that of the front surface 1.
1 is sufficiently larger than the radius of curvature R ₁ , and the center O _{2 of the} curvature circle of the rear surface 12 is eccentric to the front B side from the center O _{1 of the} curvature circle of the front surface 11.

Further, the front side surface 11 and the back side surface 12
Are smoothly connected by an inscribed circle common to both surfaces. The radius R _{3 of the} inscribed circle is sufficiently smaller than the radius of curvature R ₁ of the front surface 11.

In the case of the bottle container 1 having the above structure, when the pressure in the container is reduced, the rear surface 12 of the body 2 in the deformable area A is deformed and dented inward, but the front surface 11 is not deformed, to keep the arc-shaped curvature radius R _1.

FIG. 5 is a side view of a main part of the bottle container 1 thus deformed, and FIG. 6 is a sectional view taken along line III-III of FIG. The reason that the front surface 11 does not deform and only the rear surface 12 deforms is that the rear surface 12 has a radius of curvature R
₂ does not come off because it is larger than the radius of curvature R ₁ of the front surface 11.

The present applicant has proposed a radius of curvature R of the front surface 11.
₁ is 60.4 mm, radius of curvature R ₂ of the back surface 12 is 90 m
m, the radius R ₃ of the inscribed circle connecting them is 30 mm, the outer radius R ₄ of the round body 2 is 61.4 mm, the total height of the bottle container 1 is 355 mm, and the length of the deformable area A in the axial direction is about Fifteen
When the bottle container 1 was made as a prototype and subjected to a vacuum test, the rear surface 12 was deformed and the front surface 1 was deformed.
It was confirmed that No. 1 was not deformed.

Therefore, in this bottle container 1, when printing is directly performed on the front side of the deformable area A in the body portion 2 or when a shrink label is attached so that the printed portion is located on the front side, the inside of the bottle container 1 is changed. Since the front side surface 11 does not deform even if the pressure is reduced, the bottle container 1 looks not deformed when viewed from the front, and the printed letters and patterns look very clean without distortion. The value will not be lost.

In this embodiment, the bottle container 1 having the handle portion 10 has been described. However, the bottle container 1 having no handle portion 10 can be applied to the cross-sectional shape of the body portion. Almost the entire length can be the deformable region.

FIG. 7 is an end view showing another embodiment of the cross section of the body 2 in the deformable area A of the bottle container. Embodiment of Figure 7 is obtained by the flat surface of the rear side surface 12, in this case can be considered that the radius of curvature R ₁ of the rear surface 12 to infinity.

FIG. 8 is an end view showing the cross-sectional shape of the body 2 in the deformable area A of the bottle container 1 according to the second invention. In this bottle container 1, the rear surface 12 of the body 2 in the deformable area A is formed into a concave shape that is concave inward, and the radius of curvature R ₅ of the rear surface 12 is sufficiently larger than the radius of curvature R ₁ of the front surface 11. It was made larger. The other configuration is the same as that of the first invention, and the description is omitted.

Also in the cases of FIGS. 7 and 8, when the inside of the bottle container 1 is decompressed, the rear surface 12 is deformed, and the front surface 11 is not deformed.

[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 body portion of a deformable region before deformation of a resin bottle container according to the first invention (a cross-sectional view taken along line II of FIG. 3).

FIG. 2 is a plan view of the bottle container (FIG. 3 II-II arrow view).
It is.

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

FIG. 4 is an overall rear view of the bottle container before deformation.

FIG. 5 is a side view of a main part after the bottle container is deformed.

FIG. 6 is a transverse cross-sectional view (a cross-sectional view taken along the line III-III in FIG. 5) of a deformable region after the bottle container is deformed.

FIG. 7 shows another embodiment of the bottle container, and is an end view of a trunk cross section of a deformable region before deformation.

FIG. 8 is an end view of a cross section of a trunk portion of a deformable region before deformation of a resin bottle container according to the second invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Resin bottle container 2 Body 5 Reinforcement rib groove 6 Reinforcement rib groove A Deformable area B Front C Back O ₁ Center of curvature circle on front side O ₂ Center of curvature circle on back side R ₁ Curvature radius on front side R ₂ Back Radius of curvature of the side

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65D 1/02 B65D 1/40

Claims (6)

(57) [Claims] 1. A body having a substantially cylindrical cross section, wherein at least one area along the axial direction of the body is a deformable area, and a radius of curvature on the back side of the cross-sectional outer shape in the deformable area. 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. 2. The resin bottle container according to claim 1, wherein the back side and the front side in the deformable region are connected by an inscribed circle common to both the back side and the front side. 3. The body is provided with reinforcing rib grooves on both sides of the deformable region, and a central portion of a rear surface of the deformable region is substantially flush with a bottom surface of the reinforcing rib groove. 3. The method according to claim 1, wherein
4. The resin bottle container according to 1. 4. A resin bottle container having a body part having a substantially cylindrical cross section, wherein at least one area along the axial direction of the body part is a deformable area, and a rear surface of a cross-sectional outer shape in the deformable area. A resin bottle container characterized in that the side is formed in a concave curved shape. 5. The resin bottle container according to claim 4, wherein a radius of curvature of the concave side on the back side is larger than a radius of curvature on the front side in the deformable region. 6. The resin bottle container according to claim 1, wherein the resin material is polyethylene terephthalate.