JP7471189B2 - Bottle - Google Patents

Description

The present invention relates to a bottle.

Conventionally, as shown in, for example, Patent Document 1 below, a bottle has been known in which a cylindrical mouth, shoulder, and body, and a bottomed cylindrical bottom are connected in this order from top to bottom, the bottom has a central wall located on the bottle axis extending in the up-down direction, and a connecting peripheral wall connecting the outer periphery of the central wall and the lower end of the body, three or more vertical recessed ridges are formed at intervals in the circumferential direction on the connecting peripheral wall, legs are formed in each portion of the connecting peripheral wall between adjacent vertical recessed ridges in the circumferential direction that protrude downward from the central wall, and the body has an expanded diameter portion and a reduced diameter portion that has a larger radius of curvature in a cross section perpendicular to the bottle axis than the expanded diameter portion and is located radially inward from the expanded diameter portion, which are alternately connected in the circumferential direction.

JP 2018-104066 A

However, in the conventional bottles, for example, when the bottle is made lighter or filled with a high gas volume content, the central wall may bulge downward, which may cause the bottle to fall out.

The present invention provides a bottle that is less likely to fall out.

The present invention employs the following means to solve the above problems. That is, the bottle of the present invention has a cylindrical mouth, shoulder, and body, and a bottomed cylindrical bottom, which are connected in this order from top to bottom, the bottom has a central wall located on a bottle axis extending in the up-down direction, and a connecting peripheral wall connecting an outer periphery of the central wall and a lower end of the body, the connecting peripheral wall is formed with three or more vertical recessed ridges spaced apart in the circumferential direction, the connecting peripheral wall is formed with legs protruding below the central wall in each portion located between adjacent vertical recessed ridges in the circumferential direction, the body and the bottom are provided with enlarged diameter portions and extending perpendicular to the bottle axis from the enlarged diameter portions. and a reduced diameter portion having a large radius of curvature in cross section and located radially inward of the expanded diameter portion, the expanded diameter portion and the reduced diameter portion are arranged alternately in the circumferential direction, the expanded diameter portion and the reduced diameter portion are provided across at least the lower end of the body portion and the upper end of the connecting peripheral wall portion, of the body portion and the bottom portion, at least the upper end of the vertical concave stripe portion is provided in the reduced diameter portion, the expanded diameter portion and the reduced diameter portion are provided continuously over the entire length in the vertical direction between the upper end of the body portion and a vertical middle portion of the connecting peripheral wall portion, and present a curved shape that protrudes radially outward in the cross section .

According to the present invention, the body and bottom are formed with a reduced diameter portion having a larger radius of curvature in cross section than the expanded diameter portion and located radially inward than the expanded diameter portion, so that when the bottle internal pressure rises, the reduced diameter portion can be easily deformed radially outward, and the bottom surface of the vertical concave rib portion, at least the upper end of which is provided on the reduced diameter portion, can also be easily deformed radially outward following the deformation of the reduced diameter portion. As a result, when the bottle internal pressure rises, the outer peripheral edge of the central wall portion is pulled radially outward, and the rigidity of the central wall portion against downward deformation is increased, making it difficult for the bottom to fall out.
Since the reduced diameter portion is provided not only across the connecting peripheral wall portion but also across the body portion, when the internal bottle pressure rises, it is possible to reliably deform the portion of the reduced diameter portion located on the connecting peripheral wall portion radially outward by following the radially outward deformation of the body portion; it also becomes easier to deform the body portion radially outward when the internal bottle pressure rises, making it possible to suppress the increase in internal bottle pressure and reliably preventing the bottom from falling out.

The bottom surface of the vertical groove may be connected to the outer peripheral edge of the central wall.

In this case, the bottom surface of the vertical grooves is connected to the outer peripheral edge of the central wall, so that when the bottom surface of the vertical grooves deforms radially outward as the internal pressure of the bottle increases, the rigidity of the central wall against downward deformation can be reliably increased.

The bottom surface of the vertical groove may extend radially inward from above toward the outer periphery of the central wall.

In this case, the bottom surface of the vertical groove extends radially inward from above toward the outer peripheral edge of the central wall, so that when the bottom surface of the vertical groove deforms radially outward as the internal pressure of the bottle increases, the rigidity of the central wall against downward deformation can be increased even more reliably.

This invention makes it less likely for the bottom to fall out.

FIG. 1 is a side view of a bottle according to one embodiment of the present invention. 2 is a cross-sectional view taken along line II-II of FIG. 1.

Hereinafter, one embodiment of the bottle 1 will be described with reference to the drawings.
As shown in FIG. 1, the bottle 1 comprises a cylindrical mouth portion 11, a shoulder portion 12, a body portion 13, and a cylindrical bottom portion 14 with a bottom, and these portions 11 to 14 are connected in this order with their respective central axes positioned on a common axis.
Hereinafter, the common axis will be referred to as the bottle axis O, the mouth 11 side along the bottle axis O will be referred to as the upper side, and the bottom 14 side will be referred to as the lower side, the direction along the bottle axis O will be referred to as the up-down direction, the direction that intersects the bottle axis O when viewed from the up-down direction will be referred to as the radial direction, and the direction that rotates around the bottle axis O will be referred to as the circumferential direction.

The bottle 1 is integrally formed from a synthetic resin material such as polyethylene terephthalate, and is formed by, for example, biaxially stretched blow molding, etc. The bottle 1 is filled with a content such as a carbonated drink that increases the internal pressure of the bottle in a sealed state.
In the illustrated example, the mouth 11, shoulder 12, body 13, and bottom 14 each have a circular cross-sectional shape perpendicular to the bottle axis O. The lower end of the shoulder 12 and the upper end of the body 13 are connected without any steps. The lower end of the body 13 and the upper end of the bottom 14 are also connected without any steps.

The bottom 14 has a central wall portion 15 located on the bottle axis O, and a connecting peripheral wall portion 16 that connects the outer peripheral edge of the central wall portion 15 and the lower end of the body portion 13.
The central wall portion 15 is formed in a disk shape with the front and back surfaces facing the up-down direction, and is disposed coaxially with the bottle axis O. The central wall portion 15 may be formed in a curved shape that is convex or concave facing upward.

Three or more vertical grooves 17 are formed in the connecting peripheral wall portion 16 at intervals in the circumferential direction.
The bottom surface of the vertical groove 17 is connected to the outer peripheral edge of the central wall 15. The bottom surface of the vertical groove 17 and the lower surface of the central wall 15 are connected without any steps. The bottom surface of the vertical groove 17 extends radially inward from the top toward the outer peripheral edge of the central wall 15. The bottom surface of the vertical groove 17 has a curved shape that protrudes radially outward in a vertical cross-sectional view along the up-down direction. The bottom surface of the vertical groove 17 has a circumferential size (width) that decreases as it goes upward. The bottom surface of the vertical groove 17 has a triangular shape that is pointed upward when viewed from the outside in the radial direction. The depth of the upper end of the vertical groove 17 becomes shallower as it goes upward. The bottom surface of the upper end of the vertical groove 17 is connected without any steps to the outer peripheral surface of the bottle 1 that faces radially outward.
In addition, the bottom surface of the vertical groove portion 17 may have a shape, for example, of a series of straight lines and curved lines when viewed in the vertical cross section.

In the connecting peripheral wall portion 16, leg portions 18 that protrude downward beyond the central wall portion 15 are formed in each portion located between adjacent vertical recessed strip portions 17 in the circumferential direction.
The leg portion 18 includes an inner wall portion 19 , an outer wall portion 20 , a ground portion 22 , and a pair of side wall portions 21 .

The inner wall portion 19 extends downward from the outer circumferential edge portion of the central wall portion 15 toward the outside in the radial direction. The inner wall portion 19 has a curved shape that protrudes upward in the vertical cross section. The outer end portion of the inner wall portion 19 in the radial direction is located radially inward of the body portion 13.
The outer wall portion 20 extends radially inward as it extends downward from the lower end portion of the body portion 13. The lower end portion of the outer wall portion 20 presents a curved shape that protrudes radially outward in the vertical cross-sectional view.
The grounding portion 22 connects the radially outer end of the inner wall portion 19 and the lower end of the outer wall portion 20. The grounding portion 22 is formed at the lower end of the leg portion 18 and extends in the circumferential direction. The grounding portions 22 are provided intermittently over the entire circumferential length of the bottom portion 14, and are located on the same circle centered on the bottle axis O.
The side wall portion 21 has its front and back surfaces facing the circumferential direction, and connects the circumferential ends of the inner wall portion 19, the outer wall portion 20, and the ground portion 22 to the circumferential end of the bottom surface of the vertical groove portion 17.

The vertical grooves 17 are formed to have the same shape and size, and are arranged at equal intervals in the circumferential direction. The legs 18 are formed to have the same shape and size, and are arranged at equal intervals in the circumferential direction.
An odd number of vertical grooves 17 and legs 18 are provided. In the illustrated example, five vertical grooves 17 and five legs 18 are provided, and the bottom 14 is formed in a so-called petaloid shape. An even number of vertical grooves 17 and legs 18 may be provided.

The body portion 13 and the bottom portion 14 are formed with enlarged diameter portions 13b and reduced diameter portions 13a that are alternately connected in the circumferential direction.
The expanded diameter portion 13b has a curvature centered on the bottle axis O in a cross-sectional view perpendicular to the bottle axis O. The reduced diameter portion 13a has a larger radius of curvature in the cross-sectional view than the expanded diameter portion 13b, and is located radially inward of the expanded diameter portion 13b.

The number of enlarged diameter portions 13b and reduced diameter portions 13a is the same as the number of vertical grooves 17 and legs 18. The multiple enlarged diameter portions 13b are formed to have the same shape and size, and are arranged at equal intervals in the circumferential direction. The multiple reduced diameter portions 13a are formed to have the same shape and size, and are arranged at equal intervals in the circumferential direction. The enlarged diameter portions 13b and reduced diameter portions 13a are connected together without any steps in the circumferential direction.

In the cross-sectional view, the outer circumferential surface of the enlarged diameter portion 13b is located on a circle C centered on the bottle axis O, and the outer circumferential surface of the reduced diameter portion 13a is located radially inward from the circle C. In the cross-sectional view, the outer circumferential surface of the reduced diameter portion 13a is located radially inward from the circle C by, for example, a maximum of about 0.5 mm. In the cross-sectional view, the reduced diameter portion 13a, like the enlarged diameter portion 13b, has a curved shape that protrudes radially outward in the cross-sectional view. In the cross-sectional view, the radius of curvature of the enlarged diameter portion 13b is, for example, 70% or more and less than 100% of the radius of curvature of the reduced diameter portion 13a. The circumferential length of the reduced diameter portion 13a is longer than the circumferential length of the enlarged diameter portion 13b.

The enlarged diameter portion 13b and the reduced diameter portion 13a are provided across at least the lower end of the body portion 13 and the upper end of the connecting peripheral wall portion 16 of the body portion 13 and the bottom portion 14. At least the upper end of the vertical groove portion 17 is provided in the reduced diameter portion 13a.

In the illustrated example, the enlarged diameter portion 13b and the reduced diameter portion 13a are provided over the entire vertical length between the upper end portion of the body portion 13 and the vertical middle portion of the connecting peripheral wall portion 16. The enlarged diameter portion 13b and the reduced diameter portion 13a each extend straight in the vertical direction.
The enlarged diameter portion 13b and the leg portion 18 are provided at the same circumferential position. The circumferential centers of the enlarged diameter portion 13b and the leg portion 18 are provided at the same circumferential position.
The reduced diameter portion 13a and the vertical groove portion 17 are provided at the same circumferential position. The circumferential centers of the reduced diameter portion 13a and the vertical groove portion 17 are provided at the same circumferential position. The bottom surface of the vertical groove portion 17 is located on the inner side of the reduced diameter portion 13a in the circumferential direction.

The size of the portion of the bottom surface of the vertical groove 17 that is located in the reduced diameter section 13a, parallel to the vertical direction, is 50% to 70% of the size of the bottom surface of the vertical groove 17, parallel to the vertical direction.

As described above, according to the bottle 1 of this embodiment, the body 13 and the bottom 14 are formed with the reduced diameter portions 13a which have a larger radius of curvature in the cross section than the expanded diameter portions 13b and are located radially inward than the expanded diameter portions 13b. This makes it possible to easily deform the reduced diameter portions 13a radially outward when the internal pressure of the bottle increases, and also makes it possible for the bottom surface of the vertical concave rib portion 17, at least an upper end of which is provided in the reduced diameter portion 13a, to easily deform radially outward in response to the deformation of the reduced diameter portions 13a.
As a result, when the internal pressure of the bottle rises, the outer peripheral edge of the central wall portion 15 is pulled radially outward, increasing the rigidity of the central wall portion 15 against downward deformation, making it less likely for the bottle to bottom out.

Since the reduced diameter portion 13a is provided across not only the connecting peripheral wall portion 16 but also the body portion 13, when the internal bottle pressure rises, it is possible to reliably deform the portion of the reduced diameter portion 13a located at the connecting peripheral wall portion 16 in the radially outward direction in response to the radially outward deformation of the body portion 13, and when the internal bottle pressure rises, it becomes easier to deform the body portion 13 in the radially outward direction, making it possible to suppress the rise in internal bottle pressure and reliably preventing the bottom from falling out.

The bottom surface of the vertical groove 17 is connected to the outer peripheral edge of the central wall 15, so that when the bottom surface of the vertical groove 17 deforms radially outward as the pressure inside the bottle increases, the rigidity of the central wall 15 against downward deformation can be reliably increased.

The bottom surface of the vertical groove 17 extends radially inward from above toward the outer periphery of the central wall 15, so that when the bottom surface of the vertical groove 17 deforms radially outward as the internal pressure of the bottle increases, the rigidity of the central wall 15 against downward deformation can be increased even more reliably.

The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

For example, the components in the above-described embodiments may be replaced with well-known components as appropriate without departing from the spirit of the present invention, and the above-described embodiments and variations may be combined as appropriate.

Reference Signs List 1 Bottle 11 Mouth 12 Shoulder 13 Body 13a Reduced diameter portion 13b Expanded diameter portion 14 Bottom 15 Central wall 16 Connecting peripheral wall 17 Vertical groove 18 Leg O Bottle axis

Claims (3)

A cylindrical mouth portion, a shoulder portion, a body portion, and a bottomed cylindrical bottom portion are connected in this order from top to bottom,
The bottom portion includes a central wall portion located on a bottle axis extending in the vertical direction, and a connecting peripheral wall portion connecting an outer peripheral edge portion of the central wall portion and a lower end portion of the body portion,
Three or more vertical grooves are formed at intervals in the circumferential direction on the connecting peripheral wall portion,
In the connecting peripheral wall portion, a leg portion is formed in each portion located between the vertical recessed strip portions adjacent to each other in the circumferential direction, the leg portion protruding downward from the central wall portion,
The body and the bottom are formed with an expanded diameter portion and a reduced diameter portion having a larger radius of curvature in a cross section perpendicular to the bottle axis than the expanded diameter portion and located radially inward from the expanded diameter portion, which are alternately connected in a circumferential direction.
the enlarged diameter portion and the reduced diameter portion are provided across at least a lower end portion of the body portion and an upper end portion of the connecting peripheral wall portion,
At least an upper end of the vertical groove portion is provided in the reduced diameter portion ,
The bottle has an enlarged diameter portion and a reduced diameter portion that are continuously provided over the entire vertical length between the upper end of the body portion and the vertical middle portion of the connecting peripheral wall portion, and that have a curved shape that protrudes radially outward when viewed in cross section . The bottle according to claim 1, wherein the bottom surface of the vertical groove portion is connected to the outer peripheral edge of the central wall portion. The bottle according to claim 2, wherein the bottom surface of the vertical groove portion extends radially inward from above toward the outer peripheral edge of the central wall portion.

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