Note: Descriptions are shown in the official language in which they were submitted.
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1
DESCRIPTION.
Title of Invention
BOTTLE
Technical Field
[0001]
The present invention relates to a bottle.
Priority is claimed on Japanese Patent Application No. 2010-240945, filed
October
27, 2010, and Japanese Patent Application No. 2010-264169, filed November 26,
2010.
Background Art
[0002]
As a bottle formed of a synthetic resin material into a cylindrical shape with
a bottom,
a bottle in which a bottom wall portion of a bottom includes a ground contact
portion which
is positioned at an outer circumferential edge portion, a rising peripheral
wall portion which
is connected to the ground contact portion from an inner side of a bottle
radial direction and
extends upward, a movable wall portion which projects from an upper end
portion of the
rising peripheral wall portion to an inner sidc of the bottle radial
direction, and a depressed
peripheral wall portion which extends upward from an inner end portion of the
movable wall
portion in the bottle radiation direction, and depressurization in the bottle
is absorbed by
causing the movable wall portion to revolve about a connecting portion with
the rising
peripheral wall portion so as to move the depressed peripheral wall portion
upward as
disclosed in Patent Document 1, for example,
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has been conventionally known.
Citation List
Patent Document
[0003]
[Patent Document 1] Japanese Unexamined Patent Application, First
Publication No. 2010-126184
Summary of Invention
Technical Problem
[0004]
According to the conventional bottle, however, there is a room for improvement
of a performance of absorbing depressurization in the bottle.
[0005]
This, the present invention was made in consideration of the above
circumference, and an object thereof is to provide a bottle capable of
improving a
performance of absorbing depressurization in the bottle.
Solution to Problem
[0006]
In order to achieve the above object, the present invention provides the
following means.
(1) The bottle according to an embodiment of the present invention is a bottle
formed of a synthetic resin material into a cylindrical shape with a bottom, a
bottom wall
portion of the bottom including: a ground contact portion which is positioned
at an outer
circumferential edge portion; a rising peripheral wall portion which is
connected to the
ground contact portion from an inner side of a bottle radial direction and
extends upward;
an annular movable wall portion which protrudes from an upper end portion of
the rising
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peripheral wall portion to the inner side of the bottle radial direction; and
a depressed
peripheral wall portion which extends upward from an inner end portion of the
movable
wall portion in the bottle radial direction, wherein the movable wall portion
is disposed
so as to freely revolve about a connecting portion with the rising peripheral
wall portion
so as to move the depressed peripheral wall portion upward, wherein the rising
peripheral
wall portion extends so as to gradually incline to the inner side of the
bottle radial
direction from the ground contact portion to the connecting portion with the
movable
wall portion, and an inclination angle thereof is an angle of equal to or
greater than 00
and less than 200 with respect to a bottle axis, and wherein the height from
the ground
= 10 contact portion to the connecting portion between the rising
peripheral wall portion and
the movable wall portion is equal to or greater than 3.5 mm and less than or
equal to 7.5
[0007]
According to the bottle of the embodiment of the present invention, it is
possible
to absorb depressurization by moving the depressed peripheral wall portion
upward by
revolving the movable wall portion during the depressurization in the bottle.
Incidentally, the movable wall portion is considered to revolve about the
connecting
portion with the rising peripheral wall portion due to an increase in diameter
caused by
the upper end portion of the rising peripheral wall portion moving to the
outer side in the
bottle radial direction.
[0008]
Here, according to the bottle of the embodiment of the present invention, the
rising peripheral wall portion inclines to the inner side of the bottle radial
direction
within the above inclination angle range with respect to the bottle axis when
approaching
the connecting portion with the movable wall portion, and the height from the
ground
CA 02815354 2013-04-19
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contact portion to the connecting portion is set within the above height
range. Therefore,
the rising peripheral wall portion is considered to be designed such that the
upper end
portion as the connecting portion with the movable portion flexibly and easily
moves in
the bottle radial direction from the ground contact portion as a base point
and the upper
end portion thus easily moves to the outer side of the bottle radial direction
during the
depressurization.
Accordingly, it is possible to cause the movable wall portion to sensitively
follow variations in the inner pressure in the bottle and flexibly revolve and
to thereby
improve the performance of absorbing depressurization.
[0009]
In addition, it is considered that the upper end portion of the rising
peripheral
wall portion does not easily move in the bottle radial direction while the
ground contact
portion positioned on a side of a lower end portion ofthe rising peripheral
wall portion
easily moves in the bottle radial direction when the inclination angle of the
rising
peripheral wall portion is equal to or greater than 200 and the height from
the ground
contact portion to the connecting portion between the rising peripheral wall
portion and
the movable wall portion is less than 3.5 mni. Therefore, the ground contact
portion
easily moves to the further outer side than the upper end portion of the
rising peripheral
wall portion in the bottle radial direction during the depressurization, and
there is a
concern that the revolving motion of the movable wall portion is inhibited.
[0010]
(2) In the bottle according to the embodiment of the present invention, the
movable wall portion extends so as to gradually incline downward from the
connecting
portion with the rising peripheral wall portion to the inner side of the
bottle radial
direction, and an angle between the movable wall portion and the rising
peripheral wall
= CA 02815354 2013-04-19
portion is equal to or greater than 600 and less than or equal to 85 .
[0011]
In such a case, since the angle between the movable wall portion and the
rising
peripheral wall portion is within the above range, the aforementioned
advantageous
5 effect can be significantly displayed, that is, it is possible to cause
the movable wall
portion to sensitively follow variations in the inner pressure in the bottle
and flexibly
rotate and to thereby improve the performance of absorbing depressurization.
In
addition, since the movable wall portion extends so as to gradually incline
downward
from the connecting portion with the rising peripheral wall portion to the
inner side of the
bottle radial direction, it is easy to revolve the movable wall portion
downward during
the filling of the bottle with a substance. Therefore, it is possible to
increase the
depressurization absorbing capacity immediately after the filling by
increasing the
volume of the bottle and to thereby further improve the performance of
absorbing
depressurization.
[0012]
(3) In the bottle according to the embodiment of the present invention, the
movable wall portion extends so as to gradually incline downward from an outer
end
portion connected to the rising peripheral wall portion to an inner end
portion connected
to the depressed peripheral wall portion, and the height from the ground
contact portion
to the inner end portion of the movable wall portion is 45% or less ofthe
height from the
ground contact portion to the outer end portion of the movable wall portion.
[0013]
According to the bottle of the embodiment of the present invention, it is
possible
to absorb depressurization by moving the depressed peripheral wall portion
upward by
revolving the movable wall portion during the depressurization in the bottle.
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Particularly, since the movable wall portion extends so as to gradually
incline downward
from the outer end portion to the inner end portion and the height from the
ground contact
portion to the inner end portion is 45% or less of the height from the ground
contact portion
to the outer end portion to secure a great height difference between the outer
end portion and
the inner end portion, it is easy to revolve the movable wall portion downward
during the
filling of the bottle with a substance. Therefore, it is possible to increase
the depressurization
absorbing capability immediately after the filling by increasing the volume of
the bottle and
to thereby improve the performance of absorbing depressurization.
[0014]
(4) In the bottle according to the embodiment of the present invention, the
height of
the inner end potion of the movable wall portion from the ground contact
portion may be
equal to or greater than 2 mm.
[0015]
In such a case, the inner end portion does not easily project further downward
than the
ground contact portion when the movable wall portion revolves downward during
the filling
of the content, and it is possible to easily avoid contact with the ground
contact surface.
Accordingly, it is possible to reliably perform the filling operation while
suppressing the
projection of the inner end portion of the movable wall portion even in the
case of high-
temperature filling, for example.
Advantageous Effects of Invention
[0016]
According to a bottle of an embodiment of the present invention, it is
possible to
improve the performance of absorbing depressurization in the bottle.
6a
In accordance with one aspect of invention, there is provided bottle formed of
a synthetic
resin material into a cylindrical shape with a bottom, a bottom wall portion
of the bottom
comprising: a ground contact portion which is positioned at an outer
circumferential edge
portion; a rising peripheral wall portion which is connected to the ground
contact portion and
extends upward and inward towards a central longitudinal axis of the bottle;
an annular
movable wall portion which protrudes from an upper end portion of the rising
peripheral wall
portion towards the central longitudinal axis of the bottle; and a depressed
peripheral wall
portion which extends upward and inward from an inner end portion of the
movable wall
portion, wherein the movable wall portion is disposed so as to freely revolve
about a
connecting portion with the rising peripheral wall portion so as to move the
depressed
peripheral wall portion upward, the upper end portion of the rising peripheral
wall portion
moves outwardly when the movable wall portion revolves about the connecting
portion, the
rising peripheral wall portion extends inward towards the central longitudinal
axis of the
bottle so that a diameter of the rising peripheral wall portion is gradually
reduced from the
ground contact portion to the connecting portion with the movable wall
portion, and an
inclination angle thereof is an angle equal to or greater than 00 and less
than 200 with respect
to the central longitudinal axis of the bottle, a height from the ground
contact portion to the
connecting portion between the rising peripheral wall portion and the movable
wall portion is
equal to or greater than 3.5 mm and less than or equal to 7.5 mm, the movable
wall portion
extends so as to gradually incline downward from the connecting portion with
the rising
peripheral wall portion toward the central longitudinal axis of the bottle,
and an angle
between the movable wall portion and the rising peripheral wall portion is
equal to or greater
than 60 and less than or equal to 85 .
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Brief Description of the Drawings
[0017]
FIG. 1 is a side view of a bottle according to an embodiment of the present
invention.
FIG. 2 is a bottom view of the bottle shown in FIG. 1.
FIG. 3 is a cross-sectional view of the bottle taken along the line A-A shown
in FIG. 2.
FIG. 4 is a cross-sectional view of the bottle taken along the line B-B shown
in FIG. 2.
FIG. 5 is a bottom view of a bottle according to a modified example of the
embodiment
of the present invention.
FIG. 6 is a cross-sectional view of the bottle taken along the line C-C shown
in FIG. 5.
FIG. 7 is a side view of a bottle according to an embodiment of the present
invention.
FIG. 8 is a bottom view of the bottle shown in FIG. 7.
FIG. 9 is a cross-sectional view of the bottle take along the line A-A shown
in FIG. 8.
FIG. 10 is a bottom view of a bottle according to a modified example of the
embodiment of the present invention.
FIG. 11 is a cross-sectional view of the bottle taken along the line B-B shown
in FIG.
10.
Description of Embodiments
[0018]
Hereinafter, a description will be given of a bottle according to an
embodiment of the
present invention with reference to the drawings.
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A bottle 1 according to the embodiment includes a mouth portion 11, a shoulder
portion 12, a body portion 13, and a bottom 14 as shown in FIGS. 1 to 4 and is
substantially configured such that these components are sequentially provided
in this
order while the respective center axis lines are positioned on a common axis.
[0019]
Hereinafter, the common axis is referred to as a bottle axis O. the side of
the
mouth portion 11 in the direction of the bottle axis 0 is referred to as an
upper side, and
the side of the bottom 14 is referred to as a lower side. In addition, a
direction which is
perpendicular to the bottle axis 0 is referred to as a bottle radial
direction, and a direction
revolving about the bottle axis 0 is referred to as a bottle circumferential
direction.
In addition, the bottle 1 is formed by blow-molding a pre-forni which has been
formed into a cylindrical shape with a bottom by injection molding and is
integrally
formed of a synthetic resin material. In addition, a cap which is not shown in
the
drawings is threadably mounded to the mouth portion 11. Moreover, the
horizontal
cross-sectional shapes of the mouth portion 11, the shoulder portion 12, the
body portion
13, and the bottom 14 which are perpendicular to the bottle axis 0 are all
circular in
shape.
[00201
A first annular concave groove 15 is continuously formed over the entire
circumference of a part between the shoulder portion 12 and the body portion
13.
The body portion 13 is formed into a cylindrical shape to have a smaller
diameter than the diameters of the lower end portion of the shoulder portion
12 and the
heel portion 17 of the bottom 14 which will be described later. A plurality of
second
annular concave grooves 16 are formed on the body portion 13 at intervals in
the
direction of the bottle axis O. In the example shown in the drawing, four
second
=
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annular concave grooves 16 are formed at equal intervals in the direction of
the bottle
axis O. Each of the second annular concave grooves 16 is a groove portion
which is
continuously formed over the entire circumference of the body portion 13.
[0021]
The bottom 14 is formed into a cup shape and includes a heel portion 17 with
an
upper end opening portion which is connected to the lower end opening portion
of the
body portion 13 and a bottom wall portion 19 which blocks the lower end
opening
portion of the heel portion 17 and includes a ground contact portion 18 at the
outer
circumferential edge portion.
[0022]
In the heel portion 17, a heel lower end portion 27 which is connected to the
ground contact portion 18 from the outer side of the bottle radial direction
is formed to
have a smaller diameter than the diameter of an upper heel portion 28
connected to the
heel lower end portion 27 from the upper side.
Both the upper heel portion 28 and the lower end portion of the shoulder
portion
12 have the maximum outer diameter in the bottle 1.
[0023]
In addition, the diameter of a coupling part 29 between the heel lower end
portion 27 and the upper heel portion 28 is gradually reduced from the upper
side to the
lower side, and thus, the diameter of the heel lower end portion 27 is smaller
than the
diameter of the upper heel portion 28. Athird annular concave groove 20 with
approximately the same depth as that of the above second annular concave
groove 16 is
continuously formed over the entire circumference of the upper heel portion
28.
[0024]
As shown in FIG 3, the bottom wall portion 19 includes a rising peripheral
wall
= = CA 02815354 2013-04-19
portion 21 connected to the ground contact portion 18 from the inner side of
the bottle
radial direction and extending upward, an annular movable wall portion 22
projecting
from the upper end portion of the rising peripheral wall portion 21 to the
inner side of the
bottle radial direction, and a depressed peripheral wall portion 23 extending
upward from
5 the inner end portion of the movable wall portion 22 in the bottle radial
direction.
[0025]
The movable wall portion 22 is formed into a curved surface shape which
protrudes downward and extends so as to gradually incline downward from the
outer side
to the inner side of the bottle radial direction. The movable wall portion 22
and the
10 rising peripheral wall portion 21 are coupled via a curved surface
portion 25 which
protrudes upward. In addition, the movable wall portion 22 is designed to be
freely
revolved about the curved surface portion (the connecting part with the rising
peripheral
wall portion 21) 25 so as to cause the depressed peripheral wall portion 23 to
move
upward.
In addition, an annular bottom (the movable wall portion 22 and the depressed
peripheral wall portion 23) formed between the upper end of the rising
peripheral wall
portion 21 and an outer edge of an apex wall 24 disposed above the upper end
of the
rising peripheral wall portion 21 is formed into a substantially U shape
(substantially V
shape or substantially L shapc) in a vertical half cross-sectional view so as
to expand
downward over the entire circumference.
[0026]
The diameter of the rising peripheral wall portion 21 is gradually reduced
from
the lower side to the upper side. Specifically, the rising peripheral wall
portion 21
extends so as to gradually incline to the inner side of the bottle radial
direction from the
ground contact portion 18 to the curved surface portion 25 which is a
connecting portion
= CA 02815354 2013-04-19
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with the movable wall portion 22, and the inclination angle 01 is set to 10 ,
for example,
within an angular range of equal to or greater than 0 and less than 20 with
respect to the
bottle axis O.
[0027]
In addition, a height T from the ground contact portion 18 to the curved
surface
portion 25 is set to 5 mm, for example. within a height range of equal to or
greater than
3.5 mm and less than or equal to 7.5 mm in this embodiment. Moreover, an angle
02
between the movable wall portion 22 and the rising peripheral wall portion 21
is set to
73 , for example, within an angular range of equal to or greater than 600 and
less than or
equal to 85 .
[0028]
As shown in FIGS. 2 and 4, a plurality of ribs 40 are radially disposed about
the
bottle axis 0 in the bottle wall portion 22. That is, the respective ribs 40
are disposed at
uniform intervals in the bottle circumferential direction.
In the example shown in the drawings, the ribs 40 are configured such that a
plurality of concave portions 40a depressed upward in the curved surface
shapes
intermittently and linearly extend along the bottle radial direction. In so
doing, the ribs
40 have a wave form in a vertical cross-sectional view along the bottle radial
direction.
[0029]
The respective concave portions 40a are formed into a same size and a same
shape and are arranged at equal intervals along the bottle radial direction.
In addition,
the respective positions, at which the plurality of concave portions 40a are
disposed, in
the bottle radial direction are the same in each of the plurality of ribs 40.
In addition, a concave portion 40a at the outermost position in the bottle
radial
= CA 02815354 2013-04-19
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direction among the plurality of concave portions 40a in the respective ribs
40 is
proximate to the curved surface portion 25 from the inner side of the bottle
radial
direction, and a concave portion 40a at the innermost position in the bottle
radial
direction is proximate to the depressed peripheral wall portion 23 from the
outer side of
the bottle radial direction.
[00301
The depressed peripheral wall portion 23 is coaxially disposed with the bottle
axis 0 as shown in FIG 3, and is formed into a circular shape in the
horizontal
cross-sectional view such that the diameter thereof adually increases from the
upper
side to the lower side. A disc-shaped apex wall 24 which is coaxially an-anged
with the
bottle axis 0 is connected to the upper end portion of the depressed
peripheral wall
portion 23, and the depressed peripheral wall portion 23 and the apex wall 24
form a
cylindrical shape with an apex as a whole.
The depressed peripheral wall portion 23 is formed into a curved surface shape
which protrudes to the inner side of the bottle radial direction, and the
upper end portion
includes a curved wall portion 23a which is sequentially provided at the outer
circumferential edge portion of the apex wall 24. The lower end portion of the
curved
wall portion 23a is sequentially provided at the inner end portion of the
movable wall
portion 22 in the bottle radial direction via the curved surface portion 26
which protrudes
downward.
[0031]
If the inside of the bottle 1 configured as described above is depressurized,
the
movable wall portion 22 revolves upward about the curved surface portion 25 of
the
bottom wall portion 19 such that the movable wall portion 22 moves to lift the
depressed
peripheral wall portion 23 upward. That is, it is possible to absorb
variations in the
CA 02815354 2013-04-19
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inner pressure (depressurization) in the bottle 1 by actively deforming the
bottom wall
portion 19 of the bottle 1 during depressurization.
[0032]
Incidentally, it is considered that the movement of the upper end portion of
the
rising peripheral portion 21 to the outer side of the bottle radial direction
causes the
movable wall portion 22 to revolve about the curved surface portion 25 which
is a
connecting portion with the rising peripheral portion 21 during
depressurization.
Here, in the bottle 1 according to the embodiment, the rising peripheral wall
portion 21 inclines to the inner side of the bottle radial direction at the
inclination angle
01 with respect to the bottle axis 0 as the rising peripheral wall portion 21
approaches
the curved surface portion 25, the height from the ground contact portion 18
to the
curved surface portion 25 is set to the above height T, and further, the angle
between the
rising peripheral wall portion 21 and the movable wall portion 22 is set to
the above
angle 02.
[0033]
Therefore, it is considered that the upper end portion of the rising
peripheral
wall portion 21, which is the connecting portion with the movable wall portion
22, can
easily and flexibly move in the bottle radial direction from the ground
contact portion 18
as a based point, and therefore, the upper end portion can easily moves to the
outer side
of the bottle radial direction during the depressurization. Accordingly, it is
possible to
cause the movable wall portion 22 to sensitively follow the variations in the
inner
pressure in the bottle 1 and flexibly revolve and enhance the performance of
absorbing
depressurization.
In addition, since the movable wall portion 22 extends so as to gradually
incline
downward from the curved surface portion 25 as the connecting portion with the
rising
= CA 02815354 2013-04-19
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peripheral wall portion 21 to the inner side of the bottle radial direction,
it is easy to
cause the movable wall portion 22 to revolve downward during filling of the
bottle with a
substance. Therefore, it is possible to enhance the depressurization absorbing
capacity
immediately after the filling by increasing a volume in the bottle 1 and to
thereby further
easily improve the performance of absorbing depressurization.
[0034]
In addition, since the plurality of ribs 40 are formed on the movable portion
22
ofthe bottom wall portion 19, it is possible to increase a pressure receiving
area by
increasing the surface area of the movable wall portion 22 and to rapidly
deform the
movable wall portion 22 according to variations in the inner pressure in the
bottle 1.
[0035]
The bottle 1 according to the embodiment is suitable for a bottle with a
volume
of 1 liter or less and with a ground contact diameter of 85 mm or less.
[0036]
In addition, the technical scope of the present invention is not limited to
the
embodiment, and various modifications can be made without departing from the
gist of
the present invention.
[0037]
For example, although the ribs 40 intermittently and radially extend in the
above
embodiment, the present invention is not limited thereto, and the ribs 40 may
continuously extend or extend while curved. In addition, the design of the
shape and
the size of the concave portions 40a can be appropriately changed. Moreover,
the ribs
40 are not essential and may not be provided.
[0038]
In addition, a concave and convex portion 41 may be fomied over the entire
= CA 02815354 2013-04-19
circumference of the rising peripheral wall portion 21 as shown in FIGS. 5 and
6. In
addition, the concave and convex portion 41 is configured by disposing a
plurality of
convex portions 41a formed into curved surface shapes which protrude to the
inner side
of the bottle radial direction at intervals in the bottle circumferential
direction.
5 By forming the concave and convex portion 41 as described above,
feeling of
incongruity is not easily given when the bottom 14 ofthe bottle 1 filled with
content is
viewed since light which is incident on the rising peripheral wall portion 21
is diffusely
reflected by the concave and convex portion 41 or the concave and convex
portion 41 is
also filled with the substance in the bottle 1, for example.
10 [0039]
Although the angle 02 between the rising peripheral wall portion 21 and the
movable wall portion 22 is configured to be within an angular range of equal
to or greater
than 600 and less than or equal to 85 in the embodiment, the present
invention is not
limited to the angular range. For example, the movable wall portion 22 may be
15 appropriately changed so as to project in parallel with the bottle
radial direction or incline
upward, for example, or may be appropriately changed so as to be formed into a
planer
shape or a concave curved surface shape which is depressed upward.
However, it is preferable that the angle 02 between the rising peripheral wall
portion 21 and the movable wall portion 22 be within the angular range of not
equal to or
great than 60 and less than or equal to 85 and that the movable wall portion
22 incline
downward as in the embodiment. In so doing, the revolution property of the
movable
wall portion 22 is enhanced, and it is easy to improve the performance of
absorbing
depressurization.
[0040]
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Although the rising peripheral wall portion 21 and the movable wall portion 22
are connected to each other via the curved surface portion 25 in the
embodiment, a
configuration is also applicable in which an annular concave portion which is
depressed
upward with respect to a virtual line extended to the outer side of the bottle
radial
direction along the line of the surface shape of the movable wall portion 22
is formed at
the connecting portion and the movable wall portion 22 freely revolves about
the annular
concave portion. In such a case, it is possible to expect a high hinge effect
by providing
flexibility to the outer end portion of the movable wall portion 22 in the
radial direction
to thereby cause the movable wall portion 22 to further sensitively follow the
variations
in the inner pressure in the bottle 1 and flexibly deform the movable wall
portion 22 and
further improve the performance of absorbing depressurization in the bottle 1.
In addition, even in the case in which the annular concave groove is formed,
it is
preferable that the angle between the rising peripheral wall portion 21 and
the movable
wall portion 22, more specifically, the angle 02 between the rising peripheral
wall portion
21 and the virtual line be within the angular range of equal to or greater
than 60 and less
than or equal to 85 .
[0041]
In addition, although each of the horizontal cross-sectional shapes of the
shoulder portion 12, the body portion 13, and the bottom 14, which is
perpendicular to
the bottle axis 0, is a circular shape in the embodiment, the horizontal cross-
sectional
shape is not limited thereto and may be appropriately changed to a polygonal
shape or the
like, for example.
[0042]
In addition, the synthetic resin material forming the bottle 1 may be
appropriately changed to polyethylene terephthalate, polyethylene naphthalate,
CA 02815354 2013-04-19
17
amorphous polyester, or a blend material thereof. Furthermore, the bottle 1
may be
formed into a laminated structure with an intermediate layer as well as a
single layer
structure. In addition, examples of the intermediate layer include a layer
formed of a
resin material with a gas barrier property, a layer formed of a recycled
tnaterial, a layer
formed of a resin material with an oxygen absorption property, and the like.
[0043]
(Examples)
Next, description will be given of an example of a test (analysis) for
observing
how a relationship between depressurization intensity (kPa) and
depressurization
absorbing volume (m1) changes when the inclination angle 01 of the rising
peripheral
wall portion 21, and the height T from the ground contact portion 18 to the
curved
surface portion 25 are respectively changed.
In addition, the test was performed using the bottle 1 shown in FIGS. 1 to 4,
in
which the plurality of ribs 40 were formed in the movable wall portion 22.
[0044]
The test was performed by preparing a total of four patterns, namely a first
pattern with the inclination angle 01 of 5 and with the height T of 3.5 mm, a
second
pattern with the inclination angle 01 of 100 and with the height T of 3.5 mm,
a third
pattern with the inclination angle 01 of 15 and with the height I of 3.5 mm,
and a
comparison pattern with the inclination angle 01 of 20 and the height T of
3.5 mm.
[0045]
As a result, it was confirmed that a depressurization absorbing capacity
increased in an initial stage in which an increase in the depressurization
intensity was
started in any of the four patterns. This is considered to be because the
entire bottom
CA 02815354 2013-04-19
18
wall portion 19 moved upward due to the depressurization in the bottle 1.
However, it was confirmed that the depressurization absorbing capacity steeply
increased at later timing at which the depressurization intensity further
increased and
reached about 10 (kPa) in the first to third patterns. This is considered to
be because the
movable wall portion 22 smoothly revolved and inversely deformed and the
depressed
peripheral wall portion 23 was thus moved upward since the inclination angle
01 was
within the angular range of equal to or greater than 0 and less than 200 and
the height T
was in the height range of equal to or greater than 3.5 min and less than or
equal to 7.5
mm.
On the other hand, the steep increase phenomenon of the depressurization
absorbing capacity due to the inverse deformation of the movable wall portion
22 was
not observed in the case of the comparison pattern even when the
depressurization
intensity was further increased.
[0046]
In addition, it was similarly confirmed that the depressurization absorbing
capacity steeply increased at the timing at which the depressurization
intensity reached
about 10 (kPa) even when the height T was set to 5.0 mm instead of 3.5 mm and
the
inclination angle 01 was set to 5 , 10 , 15 , and 20 in the first to third
patterns.
Furthermore, the same change was confirmed even when the height T was set to
7.5 mm and the inclination angle 01 was set to 5 , 10 , 15 , and 20 . In
addition, the
steep increase phenomenon of the depressurization absorbing capacity was
observed in
the above height range even when the inclination angle 01 was set to 0 .
However, there is a problem that it is difficult to shape the bottle if the
inclination angle 01 is set to less than 0 (negative).
CA 02815354 2013-04-19
19
[0047]
Based on the above, it was confirmed that the movable wall portion 22 was
flexibly deformed and the performance of absorbing depressurization was
improved by
setting the inclination angle 01 of the rising peripheral wall portion 22
within the angular
range of equal to or greater than 00 to less than 200 and setting the height T
from the
ground contact portion 18 to the curved surface portion 25 within the height
range of
equal to or greater than 3.5 inm to less than or equal to 7.5 mm.
[0048]
Hereinafter, a description will be given of a bottle according to a second
embodiment of the present invention referring to FIGS. 7 to 9. In the
description ofthe
second embodiment, the same reference numerals as those in the first
embodiment will
be used for the same configuration as those in the first embodiment, and a
description
thereof will be omitted here.
[0049]
As shown in FIG 7, the bottom 140 of the bottle 10 according to the
embodiment is formed into a cup shape and includes a heel portion 170 at which
an
upper end opening portion of the bottom 140 is connected to the lower end
opening
portion of the body portion 13 and a bottom wall portion 190 which blocks the
lower end
opening portion of the heel portion 170 and includes a ground contact portion
180 at the
outer circumferential edge portion.
[0050]
In the heel portion 170, a heel lower end portion 270 which is connected to
the
ground contact portion 180 from the outer side of the bottle radial direction
is formed to
have a smaller diameter than the diameter of an upper heel portion 280
connected to the
heel lower end portion 270 from the upper side.
CA 02815354 2013-04-19
Both the upper heel portion 280 and both end portions of the body portion 13
in
the direction of the bottle axis 0 have the maximum outer diameter in the
bottle 10.
[0051]
In addition, the diameter of a coupling part 290 between the heel lower end
5 portion 270 and the upper heel portion 280 is gradually reduced from the
upper side to
the lower side, and thus, the diameter of the heel lower end portion 270 is
smaller than
the diameter of the upper heel portion 280. A fourth annular concave groove
310 with
approximately the same depth as that of the third annular concave groove 20 is
continuously formed over the entire circumference of the upper heel portion
280.
10 [0052]
As shown in FIG 9, the bottom wall portion 190 includes a rising peripheral
wall portion 210 connected to the ground contact portion 180 from the inner
side of the
bottle radial direction and extending upward, an annular movable wall portion
220
projecting from the upper end portion ofthe rising peripheral wall portion 210
to the
15 inner side of the bottle radial direction, and a depressed peripheral
wall portion 230
extending upward from the inner side of the movable wall portion 220 in the
bottle radial
direction.
[0053]
The ground contact portion 180 is in annular line contact, for example, with a
20 ground contact surface G. The diameter of the rising peripheral wall
portion 210 is
gradually reduced from the lower side to the upper side.
The movable wall portion 220 is formed into a curved surface shape which
protrudes downward, and extends so as to gradually incline downward from the
outer end
portion connected to the rising peripheral wall portion 210 to the inner end
portion
connected to the depressed peripheral wall portion 230.
= CA 02815354 2013-04-19
21
[0054]
In the embodiment, the movable wall portion 220 and the rising peripheral wall
portion 210 are coupled to each other via a curved surface portion 250 which
protrudes
upward, and the movable wall portion 220 and the depressed peripheral wall
portion 230
are coupled to each other via a curved surface portion 260 which protrudes
downward.
Therefore, the curved surface portion 250 functions as an outer end portion of
the
movable wall portion 220, and the curved surface portion 260 functions as an
inner end
portion of the movable wall portion 220.
In addition, the movable wall portion 220 is designed to freely revolve about
the
curved surface portion 250, which is the outer end portion of the movable wall
portion
220, so as to move the depressed peripheral wall portion 230 upward.
[0055]
In addition, the curved surface portion 250, which is the outer end portion of
the
movable wall portion 220, and the curbed surface portion 260, which is the
inner end
portion of the movable wall portion 220, are separate from the ground contact
surface G
On this occasion, a height H1 from the ground contact surface G along which
the ground
contact portion 180 is in contact with the ground to the curve surface portion
260, which
is the inner end portion of the movable wall portion 220, is set to equal to
or greater than
2 inni which is 45% or less of a height H2 from the ground contact surface G
to the
curved surface portion 250, which is the outer end portion ofthe movable wall
portion
220.
[0056]
The depressed peripheral wall portion 230 is coaxially disposed with the
bottle
axis 0 and is formed into multiple stages such that the diameter thereof
gradually
increases from the upper side to the lower side. A disc-shaped apex wall 240
which is
CA 02815354 2013-04-19
22
coaxially arranged with the bottle axis 0 is connected to the upper end
portion of the
depressed peripheral wall portion 230, and the depressed peripheral wall
portion 230 and
the apex wall 240 form a cylindrical shape with an apex as a whole.
[0057]
The depressed peripheral wall portion 230 according to the embodiment
includes a lower cylindrical portion 230a with a diameter which gradually
decreases from
the inner end portion of the movable wall portion 220 in the bottle radial
direction to the
upper side, an upper cylindrical portion 230b, which includes an upper end
potion
coupled to the outer circumferential edge portion of the apex wall 240, the
diameter of
which gradually increases when approaching downward, which is formed into a
curbed
surface shape protruding downward, and a stage portion 230c which couples both
the
cylindrical portions 230a and 230b, and the depressed peripheral wall portion
230 is
formed into a two-stage cylindrical shape.
[00581
The lower cylindrical portion 230a is formed into a circular shape in the
horizontal cross-sectional view and is coupled to the movable wall portion 220
via the
curved surface portion 260. Projecting parts 230d which project to the inner
side of the
bottle radial direction are formed in the upper cylindrical portion 230b. The
projecting
portions 230d arc formed over the entire length of the upper cylindrical
portion 230b in
the direction of the bottle axis 0 other than the upper end portion, and a
plurality of
projecting portions 230d are sequentially formed in the bottle circumferential
direction as
shown in FIG. 8.
In the example shown in the drawing, projecting portions 230d which are
adjacent in the bottle circumferential direction are arranged at intervals in
the bottle
circumferential direction.
CA 02815354 2013-04-19
23
[0059]
In addition, the horizontal cross-sectional shape of the upper cylindrical
portion
230b is deformed from a polygonal shape to a circular shape from the lower
side to the
upper side by forming the projecting portions 230d, and the horizontal cross-
sectional
shape of the upper cylindrical portion 230b at the upper end portion is a
circular shape.
At a part at which the horizontal cross-sectional shape is a polygonal shape
in the upper
cylindrical portion 230b, the projecting portions 230d correspond to sides of
the
polygonal shape, and interposed parts 230e positioned between adjacent
projecting
portions 230d in the bottom circumferential direction correspond to comers of
the
polygonal shape.
Although a case in which the polygonal shape is a substantially equilateral
triangle is exemplified in the drawing, the present invention is not limited
to the case.
[0060]
If the inside of the bottle 10 configured as described above is depressurized,
the
movable wall portion 220 revolves upward about the curved surface portion 250
such
that the movable wall portion 220 moves to lift the depressed peripheral wall
portion 230
upward. That is, it is possible to absorb variations in the inner pressure
(depressurization) in the bottle 10 by actively deforming the bottom wall
portion 190 of
the bottle 10 during the depressurization.
[0061]
Particularly, since the movable wall portion 220 extends so as to gradually
incline downward from the curved surface portion 250, which is the outer end
portion of
the movable wall portion 220, to the curved surface portion 260, which is the
inner end
portion of the movable wall portion 220, and the height H1 from the ground
contact
surface G to the curved surface portion 260, which is the inner end portion of
the
= CA 02815354 2013-04-19
24
movable wall portion 220, is 45% or less of the height 112 from the ground
contact
surface G to the curved surface portion 250, which is the outer end portion of
the
movable wall portion 220, to secure a large height difference, it is easy to
cause the
movable wall portion 220 to revolve downward during filling of content.
Therefore, it
is possible to enhance the depressurization absorbing capacity immediately
after the
filling by increasing the volume of the bottle 10 and to thereby improve the
performance
of absorbing depressurization.
[0062]
Furthermore, since the curved surface portion 260, which is the inner end
portion of the movable wall portion 220, is separate from the ground contact
surface G
by equal to or greater than 2 mm, the curved surface portion 260 does not
easily project
further downward than the ground contact portion 180 when the movable wall
portion
220 revolves downward during filling of content, and contact with the ground
contact
surface G can be easily avoided. Accordingly, it is possible to reliably
perform the
filling operation while suppressing the projection of the curved surface
portion 260 even
in the case of a high-temperature filling.
[0063]
Although a case in which the curved surface portion 260, which is the inner
end
portion of the movable wall portion 220, is the lowermost end potion which is
the closest
to the ground contact surface G in the movable wall portion 220 is exemplified
in the
embodiment, a case in which a substantially intermediate part of the bottle
radial
direction corresponds to the lowermost end portion can be also considered
depending on
the shape of the movable wall portion 220. In such a case, the height to the
lowermost
portion is H1.
[0064]
CA 02815354 2013-04-19
In addition, the bottle 10 according to the embodiment is suitable for a
bottle
with a volume of 1 liter or less and with a ground contact diameter of 85 inm
or less,
which is used when filling the bottle with the substance at 75 C or lower
(more
specifically, a temperature range from 60 C to 75 C).
5 [0065]
In addition, the technical scope of the present invention is not limited to
the
embodiment, and various modifications can be made without departing from the
gist of
the present invention.
[0066]
10 As shown in FIGS. 10 and 11, a plurality of ribs 400 may be radially
formed
about the bottle axis 0 in the bottle wall portion 220 in the embodiment. That
is, the
respective ribs 400 are disposed at uniform intervals in the bottle
circumferential
direction.
In the example shown in the drawings, the ribs 400 are configured such that a
15 plurality of concave portions 400a depressed upward in the curved
surface shapes
intermittently and linearly extend along the bottle radial direction and the
ribs 400 are
formed into a wave form in a vertical cross-sectional view along the bottle
radial
direction. In addition, the respective concave portions 400a are formed into
the same
size and the same shape and are arranged at equal intervals along the bottle
radial
20 direction. In addition, the respective positions, at which the plurality
of concave
portions 400a are disposed, in the bottle radial direction are the same in
each of the
plurality of ribs 400.
[0067]
By forming the plurality of ribs 400 in the movable portion 220 as described
25 above, it is possible to increase a pressure receiving area by
increasing a surface area of
= CA 02815354 2013-04-19
26
the movable wall portion 220 and to thereby rapidly deform the movable wall
portion
220 according to variations in the inner pressure in the bottle 10.
[0068]
Furthermore, a concave and convex portion 410 may be formed over the entire
circumference ofthe rising peripheral wall portion 210 as shown in FIGS. 10
and 11. In
addition, the concave and convex portion 410 is configured by disposing a
plurality of
convex portions 410a formed into curved surface shapes which protrude to the
inner side
of the bottle radial direction at intervals in the bottle circumferential
direction.
By forming the concave and convex portion 410 as described above, feeling of
incongruity is not easily given when the bottom 140 of the bottle 10 filled
with content is
viewed since light which is incident on the rising peripheral wall portion 210
is diffusely
reflected by the concave and convex portion 410 or the concave and convex
portion 410
is also filled with the substance in the bottle 10, for example.
[0069]
hi the embodiment, the rising peripheral wall portion 210 may be appropriately
changed so as to extend in parallel with the direction of the bottle axis 0,
for example.
In addition, the movable wall portion 220 may be appropriately changed so as
to be
formed into a planar shape or a concave curved surface shape which is
depressed upward,
for example.
[0070]
Although the upper cylindrical portion 230b is formed into a curved surface
shape which protrudes downward in this embodiment, the present invention is
not limited
to this shape.
In addition, the adjacent projecting portions 230d in the bottle
circumferential
direction are arranged at intervals in the bottle circumferential direction in
this
CA 02815354 2013-04-19
=
27
embodiment, however, the present invention is not limited thereto, and the
projecting
portions 230d may be arranged without any interval in the bottle
circumferential
direction and directly coupled to each other. In such a case, the horizontal
cross-sectional shape of the upper cylindrical portion 230b on a part where
the projecting
portions 230d are arranged may be a circular shape, or the horizontal cross-
sectional
shape of the upper cylindrical portion 230b may be a circular shape over the
entire length
in the direction of the bottle axis O.
In addition, the projecting portions 230d are not essential and may not be
provided. Furthermore, although the depressed peripheral wall portion 230 is
formed
into a two-stage cylindrical shape, the depressed peripheral wall portion 230
may be
formed into a cylindrical shape with three or more stages or may not be formed
into a
multi-stage shape.
[0071]
In addition, the synthetic resin material forming the bottle 10 may be
appropriately changed to polyethylene terephthalate, polyethylene naphthalate,
amorphous polyester, or a blend material thereof. Furthermore, the bottle 10
may be
formed into a laminated structure with an intermediate layer as well as a
single layer
structure. In addition, examples of the intermediate layer include a layer
formed of a
resin material with a gas barrier property, a layer formed of a recycled
material, a layer
formed of a resin material with an oxygen absorption property, and the like.
[0072]
In addition, although each of the horizontal cross-sectional shapes of the
shoulder portion 12, the body portion 13, and the bottom 14, which is
perpendicular to
the bottle axis 0, is a circular shape in this embodiment, the horizontal
cross-sectional
shape is not limited thereto and may be appropriately changed to a polygonal
shape or the
= CA 02815354 2013-04-19
28
like, for example.
Industrial Applicability
[0073]
According to the bottle of the embodiments of the present invention, it is
possible to improve the performance of absorbing depressurization in the
bottle.
Reference Signs List
[0074]
0: BOTTLE AXIS
T: HEIGHT FROM GROUND CONTACT PORTION TO CURVED SURFACE
PORTION
01: INCLINATION ANGLE OF RISING PERIPHERAL WALL PORTION
02: ANGLE BETWEEN MOVABLE WALL PORTION AND RISING
PERIPHERAL WALL PORTION
1: BOTTLE
12: SHOULDER PORTION
18: GROUND CONTACT PORTION
19: BOTTOM WALL PORTION OF BOTTOM
21: RISING PERIPHERAL WALL PORTION
22: MOVABLE WALL PORTION
23: DEPRESSED PERIPHERAL WALL PORTION
25: CURVED SURFACE PORTION (CONNECTING PORTION BETWEEN
MOVABLE WALL PORTION AND RISING PERIPHERAL WALL PORTION)
10: BOTTLE
140: BOTTOM
180: GROUND CONTACT PORTION
CA 02815354 2013-04-19
29
190: BOTTOM WALL PORTION OF BOTTOM
210: RISING PERIPIIERAL WALL PORTION
220: MOVABLE WALL PORTION
230: DEPRESSED PERIPHERAL WALL PORTION
250: CURVED SURFACE PORTION (OUTER END PORTION OF
MOVABLE WALL PORTION)
260: CURVED SURFACE PORTION (INNER END PORTION OF MOVABLE
WALL PORTION)
