U.S. patent application number 16/137893 was filed with the patent office on 2019-03-28 for sole structure for shoes and shoe including the same.
The applicant listed for this patent is Mizuno Corporation. Invention is credited to Shin Hirai, Kouji Ito, Shogo Matsui, Ken Nishikawa, Natsuki Sato.
Application Number | 20190090583 16/137893 |
Document ID | / |
Family ID | 65638375 |
Filed Date | 2019-03-28 |
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United States Patent
Application |
20190090583 |
Kind Code |
A1 |
Sato; Natsuki ; et
al. |
March 28, 2019 |
SOLE STRUCTURE FOR SHOES AND SHOE INCLUDING THE SAME
Abstract
A sole includes a sole body supporting an entire planta of a
wearer, lower protrusions protruding downward from a lower portion
of the sole body toward the ground and spaced from each other, and
upper protrusions protruding upward from an upper portion of the
sole body toward a planta of a wearer, each of the upper
protrusions being on the sole body and overlapping with an
associated one of the lower protrusions. Each of the lower
protrusions has, at its lower portion, a first region which makes
contact with the ground, and each of the upper protrusions has, at
its upper portion, a second region which makes contact with the
planta of the wearer and is smaller than the first region.
Inventors: |
Sato; Natsuki; (Osaka,
JP) ; Ito; Kouji; (Osaka, JP) ; Matsui;
Shogo; (Osaka, JP) ; Hirai; Shin; (Osaka,
JP) ; Nishikawa; Ken; (Osaka, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Mizuno Corporation |
Osaka |
|
JP |
|
|
Family ID: |
65638375 |
Appl. No.: |
16/137893 |
Filed: |
September 21, 2018 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A43B 13/14 20130101;
A43B 13/184 20130101; A43B 13/141 20130101; A43B 7/146 20130101;
A43B 7/1475 20130101; A43B 7/149 20130101; A43B 17/003
20130101 |
International
Class: |
A43B 13/18 20060101
A43B013/18; A43B 7/14 20060101 A43B007/14; A43B 17/00 20060101
A43B017/00 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 28, 2017 |
JP |
2017-188242 |
Jun 28, 2018 |
JP |
2018-122900 |
Claims
1. A sole structure for shoes, the sole structure comprising: a
sole body supporting an entire planta of a wearer; a plurality of
lower protrusions protruding downward from a lower portion of the
sole body toward the ground, and spaced from each other; and a
plurality of upper protrusions protruding upward from an upper
portion of the sole body toward the planta of the wearer, each of
the upper protrusions being on an upper side of the sole body and
overlapping with an associated one of the lower protrusions, each
of the lower protrusions has, at its lower portion, a first region
which makes contact with the ground, and each of the upper
protrusions has, at its upper portion, a second region which makes
contact with the planta of the wearer and is smaller than the first
region.
2. The sole structure of claim 1, wherein each of the lower
protrusions is substantially pillar-shaped, and a bottom surface of
each of the upper protrusions serves as the first region.
3. The sole structure of claim 1, wherein the second regions of the
upper protrusions vary in size depending on their positions with
respect to portions of the planta of the wearer.
4. The sole structure of claim 1, wherein the upper protrusions
vary in height depending on their positions with respect to
portions of the planta of the wearer.
5. A shoe comprising the sole structure of claim 1.
6. A shoe comprising the sole structure of claim 2.
7. A shoe comprising the sole structure of claim 3.
8. A shoe comprising the sole structure of claim 4.
9. The shoe of claim 5, further comprising: an upper attached to an
upper side of the sole structure, wherein the upper includes an
upper body and an insole integrated with the upper body.
10. The shoe of claim 5, further comprising: an inner sole arranged
on the upper side of the sole structure.
11. The shoe of claim 9, further comprising: an inner sole arranged
on the upper side of the sole structure.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims priority to Japanese Patent
Applications No. 2017-188242, filed on Sep. 28, 2017, and No.
2018-122900, filed on Jun. 28, 2018, the entire disclosures of
which are incorporated by reference herein.
BACKGROUND ART
[0002] The present disclosure relates to a sole structure for
shoes, and a shoe including the sole structure.
[0003] A sole structure for shoes has been disclosed by, for
example, Japanese Unexamined Patent Publication No. 2014-144170.
The sole structure includes a plurality of first protrusions
protruding downward from a lower surface of a sole body toward the
ground and spaced from each other, and a plurality of second
protrusions protruding upward from an upper surface of the sole
body toward the planta of a wearer of the shoes (will be
hereinafter simply referred to as a "wearer") and spaced from each
other. Each of the first protrusions is arranged to oppose to an
associated one of the second protrusions in the vertical direction
with the sole body interposed between them. Each of the first
protrusions has a lower end in the shape of a hemisphere so that
the lower end makes contact with the ground in a relatively small
area. In this sole structure, the area of contact between the first
protrusion and the ground is substantially the same as an area of
contact between the second protrusion and the planta of the
wearer.
SUMMARY
[0004] According to the sole structure of Japanese Unexamined
Patent Publication No. 2014-144170, when a foot of the wearer (the
sole structure) makes contact with the ground, a reaction force
acted on the sole structure from the ground is transferred to the
second protrusions from the first protrusions via the sole body. As
a result, the reaction force is transferred to the planta of the
wearer.
[0005] In the sole structure of Japanese Unexamined Patent
Publication No. 2014-144170, the lower end of each first protrusion
makes contact with the ground in a relatively small area, and the
area of contact between the first protrusion and the ground is
substantially the same as an area of contact between the second
protrusion and the planta of the wearer. In this configuration, the
reaction force generated upon contact with the ground tends to be
dispersed during the transfer from the first protrusions to the
second protrusions. Thus, the reaction force cannot be accurately
transferred from the second protrusions to portions of the planta
of the wearer. As a result, the wearer cannot recognize the
differences of pressures transferred to the portions of his or her
planta upon contact with the ground, and therefore, cannot easily
control his or her body movement by timely recognizing the load
applied to each portion of the planta upon contact with the
ground.
[0006] In view of the foregoing, it is therefore an object of the
present disclosure to allow the wearer to timely recognize the load
applied to each portion of the planta upon contact with the ground,
so that he or she can easily control his or her body movement.
[0007] To achieve the object, a first aspect of the present
disclosure is directed to a sole structure for shoes. The sole
structure includes a sole body supporting an entire planta of a
wearer; a plurality of lower protrusions protruding downward from a
lower portion of the sole body toward the ground, and spaced from
each other; and a plurality of upper protrusions protruding upward
from an upper portion of the sole body toward the planta of the
wearer, each of the upper protrusions being on an upper side of the
sole body and overlapping with an associated one of the lower
protrusions, each of the lower protrusions has, at its lower
portion, a first region which makes contact with the ground, and
each of the upper protrusions has, at its upper portion, a second
region which makes contact with the planta of the wearer and is
smaller than the first region.
[0008] In the first aspect, when the wearer's foot makes contact
with the ground during his or her movement, such as walking,
running, or jumping, a reaction force from the ground acts on the
lower protrusions, and is transferred from the lower protrusions to
the wearer's planta F via the upper protrusions on the upper side
of the sole body 3 respectively overlapping with the lower
protrusions. Since the second regions of the upper protrusions are
smaller than the first regions of the lower protrusions, the
reaction force generated upon contact with the ground is
concentrated from the first regions to the second regions. As a
result, the reaction force is transferred as an amplified pressure
from the second regions of the upper protrusions to the portions of
to the planta of the wearer. As a result, the wearer can recognize
the differences of pressures transferred to the portions of his or
her planta upon contact with the ground. Therefore, in the first
aspect, the wearer can easily control his or her body movement by
timely recognizing the load applied to each portion of the planta
upon contact with the ground.
[0009] A second aspect is an embodiment of the first aspect. In the
second aspect, each of the lower protrusions is substantially
pillar-shaped, and a bottom surface of each of the upper
protrusions serves as the first region.
[0010] In the second aspect, the first regions are formed as
relatively wide flat surfaces, which allows the reaction force from
the ground to be easily transferred the first regions. As a result,
the reaction force generated upon contact with the ground can be
suitably transferred from the first regions to the second
regions.
[0011] A third aspect of the present disclosure is an embodiment of
the first aspect. In the third aspect, the second regions of the
upper protrusions vary in size depending on their positions with
respect to portions of the planta of the wearer.
[0012] In the third aspect, the reaction force generated upon
contact with the ground can be suitably transferred to portions of
the planta. In particular, an excessive pressure that may be
applied to a portion, sensitive to pain, of the planta F can be
controlled.
[0013] A fourth aspect of the present disclosure is an embodiment
of the first aspect. In the fourth aspect, the upper protrusions
vary in height depending on their positions with respect to
portions of the planta of the wearer.
[0014] In the fourth aspect, the reaction force generated upon
contact with the ground can be suitably transferred to the portions
of the planta. In particular, an excessive pressure that may be
applied to a portion, sensitive to pain, of the planta F can be
controlled.
[0015] A fifth aspect is directed to a shoe including the sole
structure of any one of the first to fourth aspects.
[0016] In the fifth aspect, shoes can be provided with the same
advantageous as those of the first to fourth aspects.
[0017] A sixth aspect of the present disclosure is an embodiment of
the fifth aspect. In the sixth aspect, the shoe further includes an
upper attached to an upper side of the sole structure, wherein the
upper includes an upper body and an insole integrated with the
upper body.
[0018] In the sixth aspect, the shoe has the upper including the
upper body and the insole, and therefore, can be produced more
easily than a shoe with no insole.
[0019] A seventh aspect is an embodiment of the fifth or sixth
aspect. In the seventh aspect, the shoe further includes an inner
sole arranged on the upper protrusions.
[0020] In the seventh aspect, the inner sole is arranged on the
upper protrusions. Thus, the inner sole is interposed between the
sole structure and the wearer's planta. Specifically, the upper
protrusions make contact with the planta via the inner sole. Thus,
even if an excessive pressure is applied to the planta by the upper
protrusions, for example, the inner sole can control the pressure
applied to the planta.
[0021] According to the present disclosure, the wearer can easily
control his or her body movement by timely recognizing the load
applied to each portion of the planta upon contact with the
ground.
BRIEF DESCRIPTION OF THE DRAWINGS
[0022] FIG. 1 is a top perspective view illustrating a sole
structure of an embodiment of the present disclosure.
[0023] FIG. 2 is a bottom perspective view illustrating the sole
structure of the embodiment of the present disclosure.
[0024] FIG. 3 is a vertical cross-sectional view illustrating a
portion of the sole structure on an enlarged scale.
[0025] FIG. 4 is a top schematic view illustrating how first
regions and second regions overlap with each other.
[0026] FIG. 5 is a schematic plan view illustrating a positional
relationship between the sole structure and a skeletal structure of
a foot.
[0027] FIG. 6 is a vertical cross-sectional view of a shoe
according to a first variation of the embodiment.
[0028] FIG. 7 is a vertical cross-sectional view of a shoe
according to a second variation of the embodiment.
DETAILED DESCRIPTION
[0029] An embodiment of the present disclosure will be described in
detail with reference to the drawings. Note that the following
description of the embodiment is merely an example in nature, and
is not intended to limit the scope, applications, or use of the
present disclosure.
[0030] FIGS. 1 and 2 respectively illustrate a general view of a
shoe S according to an embodiment of the present disclosure. The
shoe S is applied to, for example, sport shoes used in various
kinds of sports such as running and ball games, shoes for daily
use, and shoes for rehabilitation.
[0031] The drawings illustrate a right shoe S only as an example.
Since the left shoe is symmetrical to the right shoe, only the
right shoe will be described in the following description, and the
description of the left shoe will be omitted herein.
[0032] In the following description, the expressions "above,"
"upward," "on," "upper," "below," "under," "lower," and "downward,"
represent the vertical positional relationship between respective
parts of the shoe S, and "front," "fore," "rear," and "hind"
represent the longitudinal positional relationship between
respective parts of the shoe S.
[0033] As shown in FIGS. 1 and 2, the shoe S has a sole 1. The sole
1 extends from a forefoot to hindfoot of a foot of a person wearing
the shoe S (will be hereinafter referred to as the "wearer"). The
sole 1 is made of, for example, an elastic material. Non-limiting
suitable examples of the material for the sole 1 include
thermoplastic synthetic resins such as ethylene-vinyl acetate
copolymer (EVA) and foams thereof, thermosetting resins such as
polyurethane (PU) and foams thereof, and rubber materials such as
butadiene rubber and chloroprene rubber and foams thereof An upper
2 which covers the wearer's foot is attached to a peripheral
portion of the sole 1 (see phantom lines in FIGS. 1 and 2).
[0034] In this embodiment, the upper 2 is comprised of an upper
body 2a. The upper body 2a mainly covers an instep of the wearer's
foot. The upper body 2a has a lower end which is open and
corresponds to the position of an upper peripheral portion 5, which
will be described later, of the sole 1. The upper body 2a is
attached to the sole 1 with the lower end fixed to the upper
peripheral portion 5. Specifically, the lower end of the upper body
2a is fixed, for example, with an adhesive, or by sewing, to an
upper surface 5a of the upper peripheral portion 5.
[0035] As shown in FIG. 3, the sole 1 has a sole body 3. The sole
body 3 supports an entire planta F of the wearer. Specifically, the
sole body 3 is substantially in the shape of a plate, and extends
in the longitudinal and width directions of the shoe S to
correspond to the entire planta F of the wearer.
[0036] As illustrated in FIGS. 2 and 3, a lower peripheral portion
4 integrated with the sole body 3 is provided for a lower side of
the sole 1. The lower peripheral portion 4 has a lower surface 4a
located below the lower end of the sole body 3, and surrounds the
outer periphery of the sole body 3.
[0037] As illustrated in FIGS. 1 and 3, the upper peripheral
portion 5 integrated with the sole body 3 is provided for an upper
side of the sole 1. The upper peripheral portion 5 has an upper
surface 5a located above the upper end of the sole body 3, and
surrounds the outer periphery of the sole body 3. The upper
peripheral portion 5 has a curved front wall 6 at its front end,
and a curved rear wall 7 at its rear end.
[0038] As shown in FIGS. 2 and 3, the sole 1 has a plurality of
lower protrusions 11. Each of the lower protrusions 11 is in the
shape of a quadrangular prism which is square-shaped when viewed in
section, for example, and protrudes downward from the lower side of
the sole body 3 toward the ground G. Specifically, each lower
protrusion 11 has a lower portion located below the lower surface
4a of the lower peripheral portion 4. The lower protrusions 11 are
spaced from each other.
[0039] An adjacent pair of lower protrusions 11 forms a groove 12
between them. The groove 12 is an upward recess formed from the
bottom surfaces of the lower protrusions 11. The groove 12 has a
smaller width and depth than the lower protrusions 11.
[0040] As shown in FIGS. 1 and 3, the sole 1 has a plurality of
upper protrusions 13. Each of the upper protrusions 13 protrudes
upward from the upper portion of the sole body 3 toward the planta
F of the wearer. Specifically, each upper protrusion 13 has a base
13a, and a tip end 13b integrated with the base 13a. The base 13a
is in the shape of a quadrangular prism which is square-shaped when
viewed in section, for example, and has a height h0 from the upper
portion of the sole body 3 to be substantially flush with the upper
peripheral portion 5. The tip end 13b has a height h1, h2, or h3
from the upper end of the base 13a, and is tapered as it goes
upward. Specifically, each upper protrusion 13 has an upper portion
located above the upper surface 5a of the upper peripheral portion
5. In a preferred embodiment, the tip end 13b has a hemispherical
vertex when viewed in section.
[0041] The upper protrusions 13 are spaced from each other, and
each of the upper protrusions 13 is paired with an associated one
of the lower protrusions 11 when viewed in section. Specifically,
each of the upper protrusions 13 on the upper side of the sole body
3 overlaps with an associated one of the lower protrusions 11.
[0042] As shown in FIGS. 3 and 4, each of the lower protrusions 11
has, at is lower portion, a first region R1 which makes contact
with the ground G (a soil surface or a floor). Specifically, each
of the first regions R1 is a bottom surface of the quadrangular
prism-shaped lower protrusion 11, and has sides, each having a
dimension a1, when viewed in plan. Each of the upper protrusions 13
has, at its upper portion, a second region R2 which makes contact
with the planta F of the wearer. Each of the second regions R2 is
substantially in the shape of a square, each side of which has a
dimension b1, b2, or b3 smaller than the dimension a1, when viewed
in plan. Specifically, the second regions R2 of the upper
protrusions 13 are smaller than the first regions R1 of the lower
protrusions 11.
[0043] In FIG. 5, a region including a thenar and heel of the
wearer's planta F is hatched with dots as a region X, and a region
except for the region X (e.g., a region including a portion
corresponding to a plantar arch of the planta F) is hatched with
diagonal lines as a region Y.
[0044] As shown in FIG. 3, the regions R2 of the upper protrusions
13 vary in size in accordance with the portions of the wearer's
planta F. Specifically, as also shown in FIG. 4, each of the second
regions R2 of the upper protrusions 13 in the region X has sides
each having the dimension b1. On the other hand, each of the second
regions R2 of the upper protrusions 13 in the region Y has sides
each having the dimension b2 or b3. The dimension b1 is larger than
the dimensions b2 and b3. The dimension b2 is larger than the
dimension b3. Since the dimensions vary in this manner, the upper
protrusions 13 in the region X have larger second regions R2 than
the upper protrusions 13 in the region Y. Specifically, the upper
protrusions 13 in the region X have a larger contact area with the
wearer's planta F than the upper protrusions 13 in the region
Y.
[0045] As shown in FIG. 3, the upper protrusions 13 vary in height
in accordance with the portions of the wearer's planta F.
Specifically, the upper protrusions 13 in the region X have a
height h0+h1. On the other hand, the upper protrusions 13 in the
region Y have a height h0+h2 or h0+h3. The height hl is smaller
than the heights h2 and h3. The height h2 is smaller than the
height h3. Since the heights vary in this manner, the upper
protrusions 13 in the region X are shorter than the upper
protrusions 13 in the region Y.
Advantages of Embodiment
[0046] With the sole 1 configured as described above, when the
wearer's foot makes contact with the ground G during his or her
movement, such as walking, running, or jumping, a reaction force
from the ground G acts on the lower protrusions 11, and is
transferred from the lower protrusions 11 to the wearer's planta F
via the upper protrusions 13 on the upper side of the sole body 3
respectively overlapping with the lower protrusions 11. Since the
second regions R2 of the upper protrusions 13 are smaller than the
first regions R1 of the lower protrusions 11, the reaction force
generated upon contact with the ground is concentrated from the
first regions R1 to the second regions R2. Thus, the reaction force
is transferred as an amplified pressure from the second regions R2
of the upper protrusions 13 to the portions of the wearer's planta
F. As a result, the wearer can recognize the differences of
pressures transferred to the portions of his or her planta F upon
contact with the ground. Therefore, the sole 1 of the shoe S of
this embodiment allows the wearer to easily control his or her body
movement by timely recognizing the load applied to each portion of
the planta F upon contact with the ground.
[0047] Further, each of the lower protrusions 11 is pillar-shaped,
e.g., substantially in the shape of a quadrangular prism as
described above, and a bottom surface thereof serves as the first
region R1. In this configuration, the first regions R1 are formed
as relatively wide flat surfaces, which allows the reaction force
from the ground G to be easily transferred to the first regions R1.
As a result, the reaction force generated upon contact with the
ground can be suitably transferred from the first regions R1 to the
second regions R2.
[0048] Moreover, the upper protrusions 13 have the second regions
R2 which vary in size depending on their positions with respect to
the portions of the wearer's planta F. Thus, the reaction force
generated upon contact with the ground can be suitably transferred
to the portions of the planta F. In particular, an excessive
pressure that may be applied to a portion, sensitive to pain, of
the planta F can be controlled.
[0049] In addition, the upper protrusions 13 vary in height
depending on their positions with respect to the portions of the
wearer's planta F. Thus, the reaction force generated upon contact
with the ground can be suitably transferred to the portions of the
planta F. In particular, an excessive pressure that may be applied
to a portion, sensitive to pain, of the planta F can be
controlled.
[0050] Still further, since the upper protrusions 13 in the region
X are made shorter than the upper protrusions 13 in the region Y,
bending of the upper protrusions 13 in the region X can be avoided,
irrespective of the magnitude of the reaction force transferred
from the corresponding lower protrusions 11.
(First Variation of Embodiment)
[0051] In the above embodiment, it has been described that the shoe
S has the upper 2 including the upper body 2a only. However, this
is merely a non-limiting example. For example, the upper 2 may have
an insole 2b in addition to the upper body 2a, just like a shoe S
of a first variation shown in FIG. 6.
[0052] The insole 2b is made of, for example, a flexible mesh
fabric. In a preferred embodiment, the insole 2b may have a
suitable thickness, and be made of a suitable material, for
transferring the reaction force to the wearer's planta from the
upper protrusions 13. As shown in FIG. 6, the insole 2b covers the
lower open end of the upper body 2a, and is interposed in the
vertical direction between the planta F of the wearer wearing the
shoe S and the sole 1.
[0053] The insole 2b is integral with the upper body 2a.
Specifically, at least ends of the insole 2b in the width direction
of the shoe S are fixed, for example, with an adhesive, or by
sewing, to a lower end of the upper body 2a. Further, the ends of
the insole 2b and the lower end of the upper body 2a are fixed, for
example, with an adhesive, or by sewing, to the upper surface 5a of
the upper peripheral portion 5.
[0054] The insole 2b is arranged on the upper protrusions 13.
Specifically, the insole 2b is arranged with its middle portion in
the width direction of the shoe S faces the upper protrusions 13 in
the vertical direction.
[0055] As can be seen in the foregoing, the shoe S of the first
variation has the upper 2 including the upper body 2a and the
insole 2b, and therefore, can be produced more easily than a shoe
whose upper 2 has no insole 2b.
[0056] Further, in the shoe S of the first variation, the upper
protrusions 13 make contact with the planta F via the insole 2b.
Thus, even if an excessive pressure is applied to the planta F by
the upper protrusions 13, for example, the insole 2b can control
the pressure applied to the planta F.
(Second Variation of Embodiment)
[0057] In the above embodiment, it has been described that the
upper protrusions 13 directly make contact with the wearer's planta
F. However, this is merely a non-limiting example. For example, the
upper protrusions 13 may indirectly make contact with the wearer's
planta F via an inner sole 14, just like in a shoe S of a second
variation shown in FIG. 7.
[0058] The inner sole 14 is made of a cloth such as a knitted,
woven, or nonwoven fabric. In a preferred embodiment, the inner
sole 14 may have a suitable thickness, and be made of a suitable
material, for transferring the reaction force to the wearer's
planta from the upper protrusions 13. As shown in FIG. 7, the inner
sole 14 is arranged on the upper protrusions 13. Specifically, the
inner sole 14 is arranged with its middle portion in the width
direction of the shoe S faces the upper protrusions 13 in the
vertical direction. That is, the inner sole 14 is interposed
between the planta F of the wearer wearing the shoe S and the sole
1. The inner sole 14 may have a peripheral portion fixed, for
example, with an adhesive, or by sewing, to the upper surface 5a of
the upper peripheral portion 5.
[0059] As can be seen in the foregoing, in the shoe S of the second
variation, the upper protrusions 13 make contact with the planta F
via the inner sole 14. Thus, even if an excessive pressure is
applied to the planta F by the upper protrusions 13, for example,
the inner sole 14 can control the pressure applied to the planta
F.
Other Embodiments
[0060] In the above embodiment, it has been described that the sole
1 includes the sole body 3 made of a single material. However, this
is merely a non-limiting example. For example, the sole 1 may be
comprised of an outsole (not shown) made of a hard elastic material
with high hardness, and a midsole (not shown) made of a soft
elastic material. In this configuration, the lower protrusions 11
may be provided for a lower surface of the outsole corresponding to
the lower portion of the sole body 3, and the upper protrusions 13
may be provided for an upper surface of the midsole corresponding
to the upper portion of the sole body 3.
[0061] In the above embodiments, it has been described that each of
the lower protrusions 11 is in the shape of a quadrangular prism.
However, this is merely a non-limiting example. For example, each
of the lower protrusions 11 may be in the shape of a triangular
prism, or a circular column. The lower protrusions 11 may have any
shape as long as they are substantially pillar-shaped.
[0062] In the first variation of the embodiment, it has been
described that the insole 2b is made of a flexible mesh fabric.
However, this is merely a non-limiting example. For example, the
insole 2b may be made of any one of a knitted fabric, a woven
fabric, a nonwoven fabric, a cloth, or a foam of resin and/or
rubber.
[0063] The insole 2b may be made of two or more layers. The layers
may be made of the same material, or different materials.
[0064] In the second variation of the embodiment, it has been
described that the inner sole 14 is fixed, for example, with an
adhesive or by sewing, to the upper surface 5a of the upper
peripheral portion 5 of the sole 1. However, this is merely a
non-limiting example. For example, the inner sole 14 may be
detachably arranged with its peripheral portion located on the
upper surface 5a of the upper peripheral portion 5 of the sole
1.
[0065] In the above embodiment, it has been described that the
lower end of the upper body 2a is directly fixed with an adhesive
to the upper surface 5a of the upper peripheral portion 5. However,
this is merely a non-limiting example. For example, in the assembly
of the shoe S, an additional step may be performed. In this step,
an intermediate body (not shown) is formed by temporarily fixing an
insole (not shown) made of a water-soluble material (such as
pulpwood) to the lower end of the upper body 2a and the upper
surface 5a of the upper peripheral portion 5. Then, this
intermediate body is immersed in an aqueous solution to dissolve
the insole only. Through this step, the shoe S can be easily
produced as in the first variation described above.
[0066] In the first variation of the embodiment, the inner sole 14
of the second variation may be arranged on the insole 2b.
[0067] Note that the present disclosure is not limited to the
embodiment described above, and various changes and modifications
may be made without departing from the scope of the present
disclosure.
INDUSTRIAL APPLICABILITY
[0068] The present disclosure is industrially applicable to, for
example, sport shoes used in various kinds of sports such as
running and ball games, training shoes for such sports, sneakers
for daily use, and shoes for rehabilitation.
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