US20150250260A1 - Shoe Sole Focusing on Windlass Mechanism - Google Patents

Shoe Sole Focusing on Windlass Mechanism Download PDF

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Publication number
US20150250260A1
US20150250260A1 US14/438,864 US201214438864A US2015250260A1 US 20150250260 A1 US20150250260 A1 US 20150250260A1 US 201214438864 A US201214438864 A US 201214438864A US 2015250260 A1 US2015250260 A1 US 2015250260A1
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United States
Prior art keywords
transverse groove
transverse
groove
average
shoe sole
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US14/438,864
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English (en)
Inventor
Ayu Bessho
Kenta Moriyasu
Tsuyoshi Nishiwaki
Hisanori Fujita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asics Corp
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Asics Corp
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Assigned to ASICS CORPORATION reassignment ASICS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MORIYASU, KENTA, FUJITA, HISANORI, BESSHO, Ayu, NISHIWAKI, TSUYOSHI
Publication of US20150250260A1 publication Critical patent/US20150250260A1/en
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
    • A43B13/141—Soles; Sole-and-heel integral units characterised by the constructive form with a part of the sole being flexible, e.g. permitting articulation or torsion
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
    • A43B13/12—Soles with several layers of different materials
    • A43B13/122—Soles with several layers of different materials characterised by the outsole or external layer
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
    • A43B13/12—Soles with several layers of different materials
    • A43B13/125—Soles with several layers of different materials characterised by the midsole or middle layer
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
    • A43B13/16—Pieced soles
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B7/00—Footwear with health or hygienic arrangements
    • A43B7/14—Footwear with health or hygienic arrangements with foot-supporting parts
    • A43B7/18—Joint supports, e.g. instep supports

Definitions

  • the present invention relates to a shoe sole focusing on the windlass mechanism.
  • Shoes with multiple or many transverse grooves extending in the transverse direction on the bottom surface of the shoe sole are well known in the art.
  • the middle foot portion of the sole does not easily deform, and the foot movement is restricted.
  • the deformation of the arch of the foot tends to be small. Therefore, even if the toe portion has an easy-to-flex structure, the arch portion of the sole does not flex so as to protrude upward.
  • a shoe sole of the present invention includes:
  • the presence of the second transverse groove and the third transverse groove allows for a portion of the shoe sole from the middle foot portion to the rear foot portion to deform (flex) into an upwardly protruding shape. Therefore, when the toe is elevated facing upward and the MP joint is extended over the first transverse groove, the plantar muscles, including at least the plantar aponeurosis, are rolled up upward, thereby tensioning the plantar aponeurosis, which makes it easier for the arch of the foot to rise.
  • the second transverse groove provided in an area between the Chopart's joint and the Lisfranc joint, including the navicular bone where the arch of the foot is highest, is deeper than the first transverse groove, and is equal to or deeper than the third transverse groove. Therefore, the rest of the midsole is thin and it becomes easier for the shoe sole to flex, thereby facilitating the upward displacement of the area where the arch is highest.
  • the midsole in the middle foot portion tends to be thick along the arch of the foot. Therefore, with the second transverse groove having a large depth, the shoe sole is easily flexed over the second transverse groove even if the midsole overall has a large average thickness.
  • a flexion area including at least one third transverse groove is provided directly below the talus, and has a larger width than other transverse grooves. This makes it easier for the rear foot portion directly below the talus to flex, thereby facilitating the upward displacement of the area of the arch.
  • the groove width of the second transverse groove is smaller than the width of the flexion area, thereby making it possible to suppress the lowering of the arch.
  • the flexion area has a large width and thus easily undergoes compressive deformation, which makes it possible to absorb the impact on the heel.
  • flexion area means that where there are a plurality of third transverse grooves, the groove ratio is 30% or more and less than 100%, wherein the groove ratio is the total value of the groove widths of the plurality of third transverse grooves with respect to the distance from the most anterior one of the front wall surfaces of the plurality of third transverse grooves, which are directly below the talus, to the most posterior one of the rear wall surfaces of the plurality of third transverse grooves.
  • the groove ratio is preferably 40% or more, and most preferably 50% or more.
  • the “longitudinal axis of the foot” as used in the present invention is represented by a straight line that connects between the center of the heel and the midpoint between the center of the ball of the big toe and the center of ball of the little toe.
  • transverse direction does not only mean to extend in the exact transverse direction that is perpendicular to the longitudinal axis, but also include a diagonally slant direction and a meandering shape.
  • the phrase “the first transverse groove extends in the transverse direction at the position of the MP joint (metatarsal phalangeal joint) or the base of the proximal phalanx of the first to third toes” means that at least a portion of the first transverse groove is provided so as to overlap with a portion of the MP joint or the base of the proximal phalanx of the first to third toes.
  • groove width means the width of a groove at the lower end thereof where an opening is formed. Therefore, the average groove width means the average value of the width of the groove at the lower end thereof where an opening is formed. Note that the term “average groove width” means that the width of the first or second transverse groove may locally be larger than the width of the flexion area.
  • the groove width of each groove is preferably about 1 mm to 50 mm.
  • each groove width of each groove is for allowing the shoe sole to flex into an upwardly protruding shape in the middle foot portion. Note that the groove width exceeding 50 mm will hinder the stability of the foot support.
  • the average depth means that the first or third transverse groove may locally be deeper than the second transverse groove.
  • the average depth means the value obtained by averaging the largest depths along the cross section parallel to the longitudinal axis. That is, it means the average depth for the area where V-shaped or U-shaped depressions are connected together.
  • FIG. 1 is a schematic medial side view showing a shoe for the left foot according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic lateral side view showing a shoe for the right foot according to Embodiment 1 of the present invention.
  • FIG. 3 is a schematic bottom view showing the same.
  • FIG. 4 is a schematic medial side view showing the shoe with its shoe sole being flexed.
  • FIG. 5 is a schematic bottom view showing a shoe sole of Embodiment 2.
  • FIG. 6 is a schematic medial side view showing a shoe according to Embodiment 3 of the present invention.
  • FIG. 7 is a schematic medial side view showing a shoe according to Embodiment 4 of the present invention.
  • FIG. 8 is a schematic medial side view showing a shoe according to Embodiment 5 of the present invention.
  • FIG. 9 is a schematic medial side view showing a shoe sole according to Embodiment 6 of the present invention.
  • FIG. 10 is a schematic bottom view showing a shoe sole of Embodiment 7.
  • FIG. 11 is a schematic cross-sectional view showing a shoe according to Embodiment 8 of the present invention.
  • FIG. 12 is a schematic cross-sectional view showing the shoe with its shoe sole being flexed.
  • FIG. 13 is a plan view showing the foot bone structure.
  • FIGS. 14A , 14 B and 14 C are graphs showing test results for Test Example 1, Test Example 2 and Reference Example, respectively.
  • an average groove width of at least one of the third transverse groove is larger than the average groove width of the first transverse groove and is larger than the average groove width of each of the at least one second transverse groove.
  • the shoe sole further includes an auxiliary transverse groove continuously extending in the transverse direction from the medial edge so as to reach at least the longitudinal axis at a position directly below a base or a shaft of a first metatarsal bone.
  • the shoe sole will likely flex smoothly in conformity with the shape of the arch whose apex is at the navicular bone.
  • the shaft refers to a portion between the base and the head, and the thickness thereof typically changes smoothly.
  • the base refers to a portion of each bone that is close to the posterior (heel side) joint and that is slightly expanding to a greater thickness, and it is referred to also as the proximal head.
  • the head refers to a portion of each bone that is close to the anterior (toe side) joint and that is slightly expanding to a greater thickness, and it is referred to also as the distal head.
  • an average depth of the auxiliary transverse groove is smaller than the average depth of the second transverse groove, and an average groove width of the auxiliary transverse groove is smaller than the average groove width of at least one of the third transverse groove.
  • the auxiliary transverse groove having a small depth and a small width will further smoothen the flexion of the shoe sole in conformity with the shape of the arch whose apex is at the navicular bone, and will not assist in lowering the arch of the foot.
  • the first transverse groove is depressed upwardly from the tread surface.
  • each of the grooves is defined by the front wall surface, the rear wall surface and a ceiling above;
  • the midsole flexes at the thinnest portion. Therefore, if the thickness of the first transverse groove to the ceiling is over 12 mm at the thinnest portion or if the thickness of the second and third transverse grooves to the ceiling is over 10 mm at the thinnest portion, the midsole will not easily flex.
  • the thinnest portion is less than 0.5 mm, it will be difficult to manufacture the midsole.
  • a maximum depth of the second and third transverse grooves is 5 mm or more and 40 mm or less;
  • the average depths of the second and third transverse grooves are 5 mm or more and 40 mm or less;
  • the shoe sole will not easily flex. On the other hand, if these values are over 40 mm, the shoe sole will be too thick.
  • the second transverse groove continuously extends across the shoe sole from the medial edge to a lateral edge of the foot
  • the arch of the foot is higher on the medial side than on the lateral side. Therefore, as the average depth of the second transverse groove is larger on the medial side than on the lateral side, the shoe sole can easily flex following the rise of the arch of the foot.
  • the third transverse groove continuously extends across the shoe sole from the medial edge to a lateral edge of the foot
  • the arch of the foot is higher on the medial side than on the lateral side. Therefore, as the average depth of the third transverse groove is larger on the medial side than on the lateral side, the shoe sole can easily flex following the rise of the arch of the foot.
  • the average depth of at least two second transverse grooves is larger than the average depth of the first transverse groove and is equal to or larger than the average depth of each of the at least one third transverse, groove.
  • the middle foot portion can easily flex smoothly.
  • an average groove width of at least two of the third transverse grooves is larger than the average groove width of the first transverse groove and is larger than the average groove width of each of the at least one second transverse groove.
  • the posterior end of the middle foot portion can easily flex smoothly in conformity with the posterior portion of the arch of the foot.
  • the shoe sole is further provided with a longitudinal groove extending from the first transverse groove to the third transverse groove;
  • an abrasion-resistant material which is less susceptible to abrasion than the band portion, is attached to a lower surface of the band portion, and the band portion and the abrasion-resistant material together form the band.
  • the band can be placed close to the tread surface.
  • a bottom surface of the band is placed above the tread surface.
  • FIGS. 1 to 4 show Embodiment 1. Note that in order to facilitate the description of the invention, FIG. 1 shows the medial side of a shoe for the left foot whereas FIG. 2 shows a lateral side view of a shoe for the right foot.
  • a shoe sole includes an outsole 1 , and a midsole 2 .
  • minute grooves (so-called a design) formed on a tread surface 1 S of the outsole 1 are omitted.
  • the outsole 1 and the midsole 2 are placed across the fore foot portion F, the middle foot portion M and the rear foot portion R.
  • the outsole 1 is formed by a foamed or non-foamed rubber, for example, and has the tread surface 1 s which has a higher abrasion resistance than the midsole 2 and which is to be in contact with the road surface.
  • the midsole 2 is formed by a foamed resin such as EVA, for example, and is placed on the outsole 1 , as shown in FIG. 2 , for reducing the impact of landing. Therefore, the midsole 2 is formed thicker than the outsole 1 .
  • the hardness of the midsole 2 is preferably 45 to 75 degrees and more preferably 50 to 70 degrees in JIS C hardness, for example.
  • a first transverse groove G 1 , second transverse grooves G 2 , third transverse grooves G 3 , and auxiliary transverse grooves G 4 are formed both in the outsole 1 and in the midsole 2 .
  • each of the transverse grooves G 1 to G 4 extends from a medial edge 10 to a lateral edge 11 in a direction perpendicular to the longitudinal axis A 1 or in a slant direction crossing the longitudinal axis A 1 .
  • the longitudinal axis A 1 is placed along a straight line that connects between the midpoint O 3 (between the ball O 1 of the big toe and the ball O 5 of the little toe) and the center O 4 of the heel.
  • the first transverse groove G 1 continuously extends in the transverse direction X from the medial edge 10 to the lateral edge 11 ( FIG. 3 ) at the position of the metatarsal phalangeal joint MP and/or the base B 30 of the proximal phalanx B 3 of the first to third toes.
  • the first transverse groove G 1 makes it easier for the metatarsal phalangeal joint MP to flex.
  • the second transverse grooves G 2 continuously extend in the transverse direction X from the medial edge 10 to the lateral edge 11 ( FIG. 3 ), in an area between the Chopart's joint JS of the first toe and the posterior end JLb of the Lisfranc joint JL.
  • there are two (a plurality of) second transverse grooves G 2 and the two second transverse grooves G 2 work in cooperation with each other, thereby forming the middle foot flexion area MA.
  • NB denotes the navicular bone
  • CB denotes the medial cuneiform bone
  • the third transverse grooves G 3 continuously extend in the transverse direction X from the medial edge 10 to the lateral edge 11 ( FIG. 3 ), in an area between the anterior end Tf and the posterior end Tb of the talus Ta.
  • there are two (a plurality of) third transverse grooves G 3 and the two third transverse grooves G 3 work in cooperation with each other, thereby forming the rear foot flexion area BA.
  • the auxiliary transverse grooves G 4 continuously extend in the transverse direction X from the medial edge 10 to the lateral edge 11 ( FIG. 3 ) at a position directly below the base B 40 or the shaft B 41 of the first metatarsal bone B 4 .
  • auxiliary transverse grooves G 4 there are two (a plurality of) auxiliary transverse grooves G 4 , and the two auxiliary transverse grooves G 4 work in cooperation with each other, thereby forming an auxiliary flexion area SA.
  • the first to fourth transverse grooves G 1 to G 4 are provided so as to be depressed upwardly from the bottom surface of the shoe sole, i.e., the tread surface 1 s in the present embodiment.
  • the first transverse groove G 1 may be formed so as to be depressed downwardly from the upper surface of the midsole 2 .
  • Each of the grooves G 1 to G 4 includes a front wall surface Fw, a rear wall surface Bw opposing the front wall surface Fw, and a ceiling T 0 , which define the groove G 1 to G 4 .
  • the middle foot flexion area MA is defined as an area extending from the most anterior one of the front wall surfaces Fw of the plurality of second transverse grooves G 2 to the most posterior one of the rear wall surfaces Bw of the plurality of second transverse grooves G 2 .
  • the average value of the width D 20 of the middle foot flexion area MA is larger than the average groove width D 1 of the first transverse groove 1 .
  • the average value of the width D 20 of the middle foot flexion area MA may be less than or equal to the average distance from the anterior end Tf to the posterior end Tb of the talus Ta.
  • the rear foot flexion area BA is defined as an area extending from the most anterior one of the front wall surfaces Fw of the plurality of third transverse grooves G 3 to the most posterior one of the rear wall surfaces Bw of the plurality of third transverse grooves G 3 .
  • the average value of the width Da of the rear foot flexion area BA is larger than the average groove width D 1 of the first transverse groove G 1 , and is larger than the average groove width D 20 of the middle foot flexion area MA.
  • the average groove width D 3 of each of the third transverse grooves G 3 is larger than the average groove width D 1 of the first transverse groove G 1 , and is larger than the average groove width D 2 of each of the second transverse grooves G 2 .
  • the soles 1 and 2 need to flex and deform so as to protrude upward in the middle foot portion M. Then, the groove widths of the second to fourth transverse grooves G 2 to G 4 may possibly decrease. There are also manufacturing-related problems. Therefore, the average groove width of each of the first to fourth transverse grooves G 1 to G 4 would need to be at least about 1 mm.
  • the maximum value of the average groove width of each of the first to fourth transverse grooves G 1 to G 4 would be 50 mm. If the value exceeds 50 mm, the sole itself, which supports the sole of the foot, drops down, thereby leading to lowering of the arch.
  • the range of the average groove width for each of the first to fourth transverse grooves G 1 to G 4 is preferably 2 mm to 40 mm and most preferably about 3 mm to 30 mm.
  • the second to fourth transverse grooves G 2 to G 4 become shallower from the medial edge 10 toward the lateral edge 11 .
  • the second transverse groove G 2 has a larger average depth on the medial side of the foot than that on the lateral side of the foot.
  • the third transverse groove G 3 has a larger average depth on the medial side of the foot than that on the lateral side of the foot.
  • the fourth transverse groove G 4 has a larger average depth on the medial side of the foot than that on the lateral side of the foot.
  • the average depth H 2 of each of the second transverse grooves G 2 is larger than the average depth H 1 of the first transverse groove G 1 , and is equal to or larger than the average depth H 3 of each of the third transverse grooves G 3 .
  • the average depth H 4 of the auxiliary transverse groove G 4 is smaller than the average depth H 2 of the second transverse groove G 2
  • the average groove width D 4 of the auxiliary transverse groove G 4 is smaller than the average groove width D 3 of the third transverse groove G 3 .
  • the average depths H 2 and H 3 of the second and third transverse grooves G 2 and G 3 are set to be about 5 mm to 40 mm. If the average depths H 2 and H 3 are smaller than 5 mm, the effect of this mechanism cannot be so expected, whereas if they are larger than 40 mm, the sole will be too thick. In view of this, the above value is preferably 7 mm to 35 mm, and most preferably 10 mm to 30 mm.
  • the average depth 112 of at least one of the second transverse grooves G 2 is larger than the average thickness T 2 a of a portion of the midsole 2 that is directly above an area where the transverse groove is provided.
  • the average depth H 3 of at least one of the third transverse grooves G 3 is larger than the average thickness T 3 a of a portion of the midsole 2 that is directly above an area where the transverse groove is provided.
  • the maximum depth Hm of the second and third transverse grooves G 2 and G 3 of FIG. 1 is preferably about 5 mm to 40 mm, more preferably about 7 mm to 35 mm, and most preferably about 10 mm to 30 mm.
  • the average depth 112 of each of the two second transverse grooves G 2 is larger than the average depth H 1 of the first transverse groove G 1 , and is equal to or larger than the average depth H 3 of each of the third transverse grooves G 3 .
  • the maximum depth Hm of each of the second transverse grooves G 2 is larger than the thickness of a portion of the midsole 2 that is directly above an area where the transverse groove having that maximum depth is provided.
  • the maximum depth Hm of each of the third transverse grooves G 3 is larger than the thickness of a portion of the midsole 2 that is directly above an area where the transverse groove having that maximum depth is provided.
  • the thickness T 1 from the upper surface of the midsole 2 to the ceiling T 0 of the first transverse groove G 1 is set to be 0.5 mm or more and less than 12 mm at the thinnest portion.
  • the thickness T 2 from the upper surface of the midsole 2 to the ceiling T 0 of the second transverse groove G 2 is set to be 0.5 mm or more and 10 mm or less at the thinnest portion.
  • the thickness T 3 from the upper surface of the midsole 2 to the ceiling T 0 of the third transverse groove G 3 is set to be 0.5 mm or more and 10 mm or less at the thinnest portion.
  • the average groove width D 3 of each of the two third transverse grooves G 3 is larger than the average groove width D 1 of the first transverse groove G 1 and is larger than the average groove width D 2 of each of the second transverse grooves G 2 .
  • some or all of the second to fourth transverse grooves G 2 to G 4 may be set to a length such that they extend from the medial edge 10 toward the lateral edge 11 past the longitudinal axis A 1 but do not reach the lateral edge 11 .
  • the arch of the foot is high on the medial side, and the effect of the windlass mechanism can be therefore expected as long as the medial side portion of the sole can flex sufficiently.
  • the transverse grooves G 1 to G 4 can extend over about 2 ⁇ 3 the total width from the medial edge 10 to the lateral edge 11 in the area where the transverse grooves G 1 to G 4 are provided.
  • the second and third transverse grooves G 2 and G 3 may be provided across the total width, whereas the first and fourth transverse grooves G 1 and G 4 are provided so as to extend from the medial edge 10 past the longitudinal axis A 1 and into a part of the lateral side portion.
  • the transverse grooves G 1 to G 4 do not need to be extending in a direction perpendicular to the longitudinal axis A 1 , but may be extending in a slant direction crossing the longitudinal axis A 1 .
  • Embodiment 3 of FIG. 6 there may be a single, i.e., only one, second transverse groove G 2 that is deeper than the third transverse groove G 3 .
  • the depth of a second transverse groove G 2 that is immediately anterior to the posterior second transverse groove G 2 is smaller than the depth of one of the third transverse grooves G 3 .
  • At least the ceiling TO of the second transverse groove G 2 is preferably placed directly below the navicular bone NB. This is because the navicular bone NB is located at the apex of the arch of the foot.
  • Embodiment 4 of FIG. 7 there is only one each of the first transverse groove G 1 , the second transverse groove G 2 and the third transverse groove G 3 .
  • the width Da of the third transverse groove G 3 is generally equal to the rear foot flexion area BA.
  • the width D 2 of the second transverse groove G 2 may be larger than the width D 3 of any of all the third transverse grooves G 3 .
  • the cross-sectional shape of the transverse grooves G 1 to G 4 may be an inverted U-letter shape, an inverted V-letter shape, a trapezoidal shape, or the like.
  • FIGS. 10 to 12 show Embodiment 7.
  • the shoe sole is further provided with a longitudinal groove GL extending from the first transverse groove G 1 to the third transverse groove G 3 of FIG. 10 .
  • a part of a band 3 is accommodated and placed in the longitudinal groove GL.
  • the band 3 of FIG. 11 includes a band portion 30 and an abrasion-resistant material 31 layered together.
  • the abrasion-resistant material 31 is formed by a rubber, for example, and is more resistant to abrasion than the band portion 30 .
  • the band portion 30 is formed by a non-stretchable tape material.
  • the band 3 is a band-shaped member that does not substantially stretch even when pulled, but can flex and slack.
  • the band 3 extends from the fore foot portion F, which is anterior to the first transverse groove G 1 , to the rear foot portion R, which is posterior to the third transverse groove G 3 , and is secured to the shoe sole in the fore foot portion F and in the rear foot portion R.
  • the bottom surface of the band 3 is placed above the tread surface 1 s .
  • the band 3 is sandwiched between the outsole 1 and the midsole 2 , with the lower surface of the band 3 being afloat.
  • the band 3 is tensioned when the toe is elevated or flexed, thereby facilitating the flexion of the middle foot portion M such as to raise the arch of the sole as indicated by the solid line.
  • Sample 1 having a structure specified in FIGS. 1 to 4 and Sample 2 having a structure specified in FIGS. 10 to 12 were produced as samples.
  • an ordinary school shoe with no deep transverse grooves was provided as a reference example.
  • angles of deformation of the sole and the foot portion while running (3.5 min/km) were measured for a plurality of iterations, and the average values were calculated.
  • the angle ⁇ along the vertical axis of FIG. 14A represents the angle of elevation of the first toe.
  • the angle As along the vertical axis of FIG. 14B represents the angle of flexion of the sole about the middle foot portion.
  • the angle Af along the vertical axis of FIG. 14C represents the angle of flexion of the vertical arch of the foot.
  • FIGS. 14A to 14C represents the percentage of the length of time from landing until kick-off.
  • the angle ⁇ i.e., the angle of elevation of the first toe, over the period of heel contact, heel rise and toe off is larger for Sample 1 and Sample 2 than for Reference Example.
  • the angle As i.e., the angle of flexion of the sole about middle foot portion, over the period of heel contact, heel rise and toe off is larger for Sample 1 and Sample 2 than for Reference Example.
  • Sample 2 which is provided with the band, has an even larger value of the angle As than Sample 1.
  • the angle Af i.e., the angle of flexion of the vertical arch of the foot, at heel contact is smaller for Sample 1 and Sample 2 than for Reference Example.
  • the angle Af is larger for Sample 1 and Sample 2 than for Reference Example over the period of heel rise and toe off.
  • Sample 2 which is provided with the band 3 , has an even larger value of the angle Af than Sample 1.
  • the first transverse groove may be provided only in one of the outsole and the midsole.
  • the band itself may be formed by an abrasion-resistant material such as an aramid fiber. Where the band is provided, the second transverse groove G 2 and the third transverse groove G 3 may be of the same depth or width.
  • the present invention is applicable to a shoe sole of a shoe for walking, running, training, etc.
  • a 1 Longitudinal axis
  • B 4 First metatarsal bone
  • B 40 Base
  • B 41 Shaft
  • BA Rear foot flexion area
  • MA Middle foot flexion area
  • SA Auxiliary flexion area
  • F Fore foot portion
  • M Middle foot portion
  • R Rear foot portion
  • G 1 First transverse groove
  • G 2 Second transverse groove
  • G 3 Third transverse groove
  • G 4 Auxiliary transverse groove
  • GL Longitudinal groove
  • H 1 , H 2 , H 3 , H 4 Average depth, Hm: Maximum depth
  • JL LISFRANC joint
  • JLb Posterior end
  • NB Navicular bone
  • CB Medial cuneiform bone
  • Ta Talus
  • Tb Posterior end
  • Tf Anterior end
  • T 2 a , T 1 a Average thickness

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
US14/438,864 2012-10-29 2012-10-29 Shoe Sole Focusing on Windlass Mechanism Abandoned US20150250260A1 (en)

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PCT/JP2012/077867 WO2014068635A1 (ja) 2012-10-29 2012-10-29 ウィンドラスメカニズムに着目した靴底

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EP (1) EP2912961A4 (ja)
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WO (1) WO2014068635A1 (ja)

Cited By (23)

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US20140259769A1 (en) * 2013-03-15 2014-09-18 New Balance Athletic Shoe, Inc. Cambered sole
US20140325876A1 (en) * 2013-05-02 2014-11-06 Wolverine World Wide, Inc. Sole assembly for article of footwear
USD747859S1 (en) * 2014-05-13 2016-01-26 Cole Haan Llc Shoe sole
USD748900S1 (en) * 2015-04-01 2016-02-09 Skechers U.S.A., Inc. Ii Shoe outsole periphery
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EP2912961A4 (en) 2016-06-15

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