WO2015173904A1 - Semelle d'usure de chaussure - Google Patents

Semelle d'usure de chaussure Download PDF

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Publication number
WO2015173904A1
WO2015173904A1 PCT/JP2014/062818 JP2014062818W WO2015173904A1 WO 2015173904 A1 WO2015173904 A1 WO 2015173904A1 JP 2014062818 W JP2014062818 W JP 2014062818W WO 2015173904 A1 WO2015173904 A1 WO 2015173904A1
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WO
WIPO (PCT)
Prior art keywords
outsole
width
region
protrusions
contact surface
Prior art date
Application number
PCT/JP2014/062818
Other languages
English (en)
Japanese (ja)
Inventor
健太 森安
西脇　剛史
堀切川　一男
山口　健
圭 柴田
Original Assignee
株式会社アシックス
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 株式会社アシックス filed Critical 株式会社アシックス
Priority to JP2014555003A priority Critical patent/JP5710083B1/ja
Priority to US15/309,769 priority patent/US20170150782A1/en
Priority to PCT/JP2014/062818 priority patent/WO2015173904A1/fr
Priority to EP14891778.4A priority patent/EP3143892B1/fr
Publication of WO2015173904A1 publication Critical patent/WO2015173904A1/fr

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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
    • A43B13/22—Soles made slip-preventing or wear-resisting, e.g. by impregnation or spreading a wear-resisting layer
    • A43B13/24—Soles made slip-preventing or wear-resisting, e.g. by impregnation or spreading a wear-resisting layer by use of insertions
    • A43B13/26—Soles made slip-preventing or wear-resisting, e.g. by impregnation or spreading a wear-resisting layer by use of insertions projecting beyond the sole surface
    • 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
    • A43B13/22—Soles made slip-preventing or wear-resisting, e.g. by impregnation or spreading a wear-resisting layer
    • A43B13/223—Profiled soles
    • 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
    • A43B13/04—Plastics, rubber or vulcanised fibre
    • 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
    • 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
    • A43B13/18—Resilient soles
    • A43B13/181—Resiliency achieved by the structure of the sole
    • 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
    • A43B13/18—Resilient soles
    • A43B13/187—Resiliency achieved by the features of the material, e.g. foam, non liquid materials

Definitions

  • the present invention is a technique relating to an outsole capable of improving the frictional force generated between the outsole of a shoe and the road surface or floor surface.
  • a design that takes into account the anti-slip function on the road surface and floor surface wet with water or oil is formed. That is, many protrusions and protrusions are provided on the surface of the outsole.
  • JP08-280406A (front page) JP2001-17203A (front page) WO 07 / 043651A (front page) JP10-510744W (front page) JP2011-255030A (front page) JP49-76822Y (front page)
  • JP08-280406A discloses an anti-slip action on a floor surface wet with sweat, for example, in volleyball competitions when worn indoors. This prior art discloses suitable dimensions for the depth of the groove and the width of the protrusion.
  • FIG. 3 shows that the block partitioned by the concave groove collapses due to the instantaneous shearing force at the time of landing, and the edge portion stands up with respect to the floor surface, and the water film is cut. It is shown that the anti-slip action is exerted on the floor surface. " In other words, it has been experimentally obtained that “if the width and depth of the concave groove are not within the range indicated by the predetermined numerical values, the protrusion does not tilt well, and the anti-slip force hardly acts on the edge itself. "It is disclosed.
  • JP2001-17203A relates to shoes for indoor exercise, particularly for underwater exercise.
  • Paragraph 0012 of the same document discloses that, when the wavelength of the corrugated groove is close to a long straight line, the anti-slip property in the bending direction is excellent, but the anti-slip property in the direction parallel to the bending line is not excellent. ing.
  • WO 07 / 043651A discloses a shoe that exhibits high anti-slip performance on a floor surface wet with water or oil.
  • the grounding block formed by the long protrusion on the inner edge side of the foot of the document is disclosed.
  • the slip prevention performance on a dry road surface or the like is not disclosed.
  • an element having a triangular cross section is greatly deformed in the vicinity of the basic contact trajectory, and the contact pressure is made uniform over the entire surface to improve the shock absorbing function.
  • an element having a triangular cross-section will deteriorate the anti-slip performance on the road surface.
  • JP2011-255030A discloses an outsole in which the ratio of the contact area to the sole area is 0.35 to 0.65 at the heel part or the toe part. This outsole may exhibit an excellent anti-slip effect when walking on snowy roads or frozen roads. However, there is no description of anti-slip performance on dry road surfaces.
  • the vertically long ridges are arranged not on the inside of the foot but on the outside of the foot.
  • the inventions of the above-mentioned documents do not attempt to improve the frictional force assuming a dry road surface.
  • some types of shoes are often used on dry road surfaces, such as marathon shoes. If the frictional force in the running direction between the outsole and the road surface becomes large on a dry road surface, the runner will easily run. Also, performance in competition may improve.
  • an object of the present invention is to provide an outsole for a shoe capable of increasing the frictional force on a dry road surface or floor surface.
  • the present inventor considered the case where an elongated protrusion touches down on the outsole, and made the following hypothesis.
  • a force F is applied in the longitudinal direction of the left ridge 1P with respect to the dry surface Sf of FIG. 6A, the ridge 1P does not exhibit a significant deformation, and the ridge 1P and the surface Sf The area of the contact surface Cs that is substantially (dotted) will be large.
  • the force F is applied in the width direction of the right ridge 1P, the ridge 1P undergoes bending deformation and exhibits a large deformation, and therefore, substantial contact between the ridge 1P and the surface Sf.
  • the area of the surface Cs will be small.
  • the inventor creates rectangular parallelepiped test pieces (first group) having different length / width ratios Pl / Pw, and applies the force F to each test piece to obtain the surface Sf.
  • the friction coefficient Fc was measured. The result is shown in the graph of FIG. 6B.
  • the test piece Tex. Is formed by laminating a midsole material 210 and an outsole material 110 on a hard plate (not shown), and a plurality of protrusions 1P and grooves 1L are formed on the outsole material 110.
  • FIGS. 7C and 7D show the measurement results of the rate of change of the friction coefficient and the dynamic friction coefficient when the surface Sf is wet with water, respectively, and FIGS. 8A and 8B show the static friction and the dynamic friction coefficient when the surface Sf is dry. The measurement results are shown.
  • white circles and black circles indicate values when the force F acts in the longitudinal direction Y and the width direction of the protrusion 1P as shown in FIGS. 7A and 7B, respectively.
  • the inventor conducted an experiment on the relationship between the thickness of the midsole and the outsole and the substantial area of the friction coefficient Fc and the contact surface Cs on a dry surface using another test piece (third group). Went.
  • the results are shown in the graphs of FIGS. 9A and 9B.
  • FIGS. 9A and 9B By comparing these two graphs, it can be seen that there is a strong correlation between the friction coefficient Fc and the substantial contact surface Cs. That is, in general, it can be seen that the thinner the outsole with respect to the midsole, the larger the area of the contact surface Cs as shown in FIG. 9B, and as a result, the friction coefficient Fc will increase as shown in FIG. 9A.
  • a common feature of the present invention described in the independent claim is an outsole of a shoe, particularly an outsole mainly composed of a flexible elastomer, the outsole having a grounding surface that contacts the road surface.
  • the ratio of the length of the protrusion to the width of the ground contact surface (length ratio Pl / Pw) is set to 1.8 times to 200 times,
  • the width of the ground contact surface of the ridge is set to 2 to 100 times the width of the longitudinal groove. Note that at least a part of the region may be considered to be 16 square centimeters or more in consideration of the area when the front foot is kicked out.
  • each long ridge is extremely small in bending deformation due to friction at the time of ground contact, Frictional forces will increase energy absorption and dissipation associated with shear deformation.
  • the shape of the ridge is unlikely to collapse during the ground contact with a dry road surface or floor surface, and a large contact area with the road surface will be maintained. Therefore, the frictional force inside the outsole against a dry road surface or the like will increase.
  • the inner forefoot part is an important part through which the movement locus of the center of gravity passes during running or walking, and the toe-off has a large forward direction. This is a site that requires reaction force. Therefore, it may be easy to run or the driving force may increase.
  • the inner rear foot portion is an important part through which the movement locus of the center of gravity passes and is the first shock that is the largest impact. This is the part that touches down after the strike. Therefore, it may be easy to run not only on a course with no slope between the outsole and a dry road surface but also on a slope or a curve.
  • the presence of the longitudinal groove is useful for reducing the weight of the outsole, and may allow the protrusion to be sheared so as to expand toward the longitudinal groove. In that case, cushioning will be improved by the outsole.
  • the flutes formed between the ridges will help to prevent the outsole from sliding in and out of the foot when there are fine grains and water such as soil and sand on the road surface. .
  • the angle between the ridge and the longitudinal groove and the long axis of the outsole is set in a range of 0 ° to 35 °. That is, the ridges and longitudinal grooves on the inner side of the foot may be arranged parallel to the major axis, or may be arranged to be inclined so as to approach the major axis as it extends forward, or , And may be arranged to be inclined so as to approach the long axis as it extends rearward.
  • the ground contact surface of the ridge is deformed by bending deformation, and therefore the function as a vertically long ridge will not be sufficiently exhibited.
  • the width of the protrusion will be remarkably reduced due to the relationship with the total length of the outsole.
  • the width of the normal ridge will normally be less than about 1.5 mm. In this case, various deformations are likely to occur in the ridge, and therefore, the substantial ground contact area at the time of ground contact will be reduced.
  • width ratio Pw / Lw width ratio
  • the width ratio Pw / Lw exceeds 100 times, for example, the width of the longitudinal groove will be less than about 0.1 mm, and it may be impossible to manufacture, or the productivity may be significantly reduced.
  • the ratio Pw / Ld of the width of the ground contact surface of the protrusion to the depth of the vertical groove is preferably 2 to 20 times.
  • the ratio Pw / Ld is less than twice, the longitudinal groove becomes too deep and the thickness of the outsole becomes too large, or the width of the ground contact surface of the ridge becomes too small. It is easy to cause a substantial decrease in the ground contact area.
  • FIG. 1 is an inner side view of a shoe provided with an outsole according to a first embodiment of the present invention. It is a bottom view of the outsole.
  • 3A, 3B, and 3C are an enlarged perspective view, a longitudinal sectional view, and a transverse sectional view schematically showing a part of the sole, respectively.
  • 4A and 4B are bottom views showing the movement trajectory of the center of gravity during walking and running, respectively.
  • FIG. 4C is a bottom view showing the frictional force applied to the outsole as a vector.
  • 5A and 5B are a bottom view and an enlarged cross-sectional view showing an outsole according to Example 2, respectively.
  • FIG. 6A is a perspective view showing a deformed state of the ridge with respect to the surface for explaining the principle of the present invention
  • FIG. 6B is a graph showing the relationship between the length ratio of the ridge and the coefficient of friction.
  • 7A and 7B are perspective views showing the shape of the test piece and the moving direction of the test piece
  • FIGS. 7C and 7D show the rate of change of the friction coefficient on the wet (water wet) surface using the test piece, respectively.
  • It is a graph which shows the value of a dynamic friction coefficient.
  • FIG. 8A and FIG. 8B are graphs showing the values of the static friction coefficient and the dynamic friction coefficient on the dry (dry) surface using the test piece, respectively.
  • FIG. 9A is a graph showing the relationship between the proportion of the midsole thickness and the dynamic friction coefficient
  • FIG. 9B is a graph showing the relationship between the proportion of the midsole thickness and the substantial contact area
  • FIG. 10A is a graph showing the relationship between the load applied to the contact surface and the coefficient of friction
  • FIGS. 10B and 10C are side views schematically showing bending deformation and shear deformation of the ridge, respectively.
  • 11A and 11B are graphs showing the relationship between the parameter R, the contact area, and the friction coefficient, respectively.
  • FIG. 12A is an enlarged perspective view showing a virtual sample used for calculation of the friction coefficient
  • FIG. 12B is a chart showing a result of a simulation in which the coefficient of friction is calculated by an electronic computer using the virtual sample.
  • FIG. 12A is an enlarged perspective view showing a virtual sample used for calculation of the friction coefficient
  • FIG. 12B is a chart showing a result of a simulation in which the coefficient of friction is calculated by an electronic computer using the virtual sample
  • FIG. 13 is a chart showing the results of another simulation.
  • FIG. 14 is a chart showing the results of another simulation.
  • FIG. 15 is a chart showing the results of another simulation.
  • FIG. 16 is a chart showing the results of another simulation.
  • FIG. 17 is a chart showing the results of another simulation.
  • FIG. 18 is a chart showing the results of another simulation.
  • FIG. 19A and FIG. 19B are charts showing the results of simulation, respectively.
  • 20A and 20B are tables showing the results of the simulation.
  • FIG. 21 is a chart showing the results of another simulation.
  • FIG. 22 is a chart showing the results of another simulation.
  • FIG. 23 is a chart showing the results of another simulation.
  • FIG. 24 is a chart showing the results of another simulation.
  • FIG. 25 is a chart showing the results of another simulation.
  • 26A to 26F are plan views showing other arrangements and shapes of the protrusions, respectively.
  • the outsole has a front end region defined by a length of 10% of the length of the long axis from the front end of the outsole toward the inner front foot portion, and the rear end of the front end region.
  • a main region defined by a length of 30% of the length of the major axis, facing the inner forefoot portion backwards;
  • the area of the ground contact surface of the ridge has a majority area of the main region,
  • the plurality of protrusions and the longitudinal grooves are provided at least at the front end of the main region.
  • a plurality of ridges and vertical grooves are provided at the front end portion of the main region immediately after the tip region of 10% of the length of the long axis, and it is easy to obtain a large frictional force when kicking forward. right.
  • the outsole includes a front first region obtained by dividing the main region into three equal parts in the front-rear direction, a second region adjacent to the first region, and a rear third region, At least one of the plurality of protrusions has an inclination that approaches the major axis as it extends forward in the first region, The at least one protrusion or another at least one protrusion of the plurality of protrusions has an inclination of moving away from the long axis as it extends forward in the third region.
  • the ridge having an inclination away from the major axis as it extends forward in the third region and the ridge having an inclination opposite to the inclination in the first region are frictions that change along the movement locus of the body center of gravity. It will extend along the direction in which the force acts, so it will be easy to increase the coefficient of friction due to the ridges.
  • the area of the ground contact surface of the plurality of protrusions is the majority of the half on the center side. Is set.
  • the movement trajectory is likely to pass through a half portion closer to the center inside the foot. Therefore, the protrusion provided in the part is easy to exhibit the function of increasing the friction coefficient.
  • the outsole has a sub-region defined by a length of 5% of the length of the major axis from the rear end of the main region in contact with the main region toward the inner front foot portion backward.
  • the area of the ground contact surface of the plurality of protrusions is set to a majority of the half of the sub-region.
  • a plurality of another ridge having a grounding surface that contacts the road surface, and at least one oblique groove defined between the plurality of another ridge
  • the plurality of other protrusions and the oblique groove extend obliquely in the front-rear direction in at least a partial region of the front half of the front foot portion outside the foot, and extend toward the outer edge of the outsole as extending forward,
  • the angle with the long axis of the outsole is set in the range of 20 ° to 45 °
  • An angle formed by the plurality of inner ridges and the plurality of outer ridges is set in a range of 10 ° to 60 °.
  • the ratio Pw / Ld of the width of the ground contact surface of the protrusion to the depth of the longitudinal groove is set to 3 to 15 times,
  • the depth of the longitudinal groove is set to 0.2 mm to 2.5 mm.
  • the ratio Pw / Ld is larger than three times, so that the longitudinal groove is not too deep and the thickness of the outsole is not too large, or the width of the ground contact surface of the ridge is reduced.
  • the ratio Pw / Ld is smaller than 15 times, so that the vertical groove does not become too shallow, and even if the outsole is worn slightly, the vertical groove is likely to remain, or the width of the ridge does not become too large. And it will be easy to provide a sufficient number of flutes.
  • the flutes will disappear when the outsole is worn slightly.
  • the depth of the longitudinal groove is too large, it is not only necessary to increase the thickness of the outsole, but bending deformation is likely to occur in the ridge when a force in the width direction is applied to the ridge.
  • the depth of the longitudinal groove is preferably 0.2 to 2.5 mm, more preferably 0.4 to 2.0 mm, and most preferably 0.5 to 1.5 mm.
  • the shoe includes an outsole 1, a midsole 2, and an upper 3 that covers the upper surface of the foot.
  • the midsole has a low hardness and the outsole has a high hardness.
  • the outsole 1 is grounded on a road surface or the like and suppresses slipping between the shoes and the road surface and is formed of a material having higher wear resistance than the midsole 2.
  • a non-foamed body or a foamed body mainly composed of a flexible elastomer such as a thermoplastic elastomer or rubber can be used.
  • the physical properties (mechanical properties) of the outsole 1 are generally set to a Young's modulus and hardness larger than the Young's modulus and hardness of the midsole 2, and for example, an Asker hardness Ha of about 55 ° to 75 ° is adopted. Good.
  • the midsole 2 is disposed on the outsole 1 and cushions an impact generated when landing.
  • a foam of a thermoplastic resin such as EVA may be employed.
  • the outsole 1 includes a plurality of ridges 1P having a grounding surface 10 that contacts a road surface, and a plurality of vertical grooves 1L defined between the plurality of ridges 1P.
  • the outsole 1 may have a lateral groove 1W between the protrusions 1P.
  • the shape of the protrusion 1P in FIG. 3A is set to a rectangular parallelepiped.
  • the plurality of protrusions 1P and the longitudinal grooves 1L in FIG. 2 may be provided over substantially the entire area of the front foot portion 1F, the middle foot portion 1M, and the rear foot portion 1B on the inner side 11 of the foot.
  • the protrusions 1P and the longitudinal grooves 1L extend in the front-rear direction Y or the oblique front-rear direction in at least a part of each of the front foot part 1F and the rear foot part 1B, and have an angle B1, which forms the long axis 1A of the outsole 1 B2 is set in the range of 0 ° to 35 °.
  • the forefoot portion 1F, the middle foot portion 1M, and the rear foot portion 1B mean portions that cover the front foot, the middle foot, and the rear foot, respectively, not shown.
  • the forefoot is composed of 5 metatarsals, 14 ribs and the like.
  • the middle foot is composed of a scaphoid bone, a cubic bone, three wedge bones, and the like.
  • the hind legs are composed of the talus and ribs.
  • the long axis 1A of the outsole 1 means a virtual line passing through the front and back ends of the outsole 1 or shoes.
  • the inner side 11 of the foot is based on a virtual curve 13 in which a midpoint O between two points where a virtual crossing line 14 orthogonal to the major axis 1A intersects the inner and outer edges of the outsole 1 is connected in the front-rear direction Y.
  • the “half equality” in the “half of the main region that is divided into two halves and the half near the center” means “the point where the crossing line 14 intersects the inner edge of the outsole 1 and the midpoint O And the inner region is divided into two by a virtual curve connecting the midpoints in the front-rear direction Y ”.
  • the outsole 1 in FIG. 2 has a front end region AT defined by a length of 10% of the length of the long axis 1A from the front end of the outsole 1 toward the front foot 1F of the inner side 11 toward the rear.
  • a main region AM defined by a length of 30% of the length of the long axis 1A from the rear end of the front end region AT toward the rear side of the forefoot portion 1F of the inner side 11;
  • the sum of the areas of the ground contact surfaces 10 of the plurality of protrusions 1P is a majority area of the main area AM.
  • the plurality of protrusions 1P and the plurality of vertical grooves 1L are provided at the front end of the main area AM.
  • the outsole 1 includes a front first area AM1 obtained by dividing the main area AM into three equal parts in the front-rear direction Y, a second area AM2 adjacent to the first area AM1, and a rear third area AM3.
  • the plurality of protrusions 1P and the longitudinal grooves 1L of the first region AM1 have an inclination B1 that approaches the long axis 1A as it extends forward.
  • the plurality of protrusions 1P and the longitudinal grooves 1L of the third region AM3 have an inclination B2 that approaches the long axis 1A as it extends rearward.
  • FIG. 4A and FIG. 4B show the movement trajectory 101 of the load center (body center of gravity) during walking and running disclosed in WO2010 / 038266A1, respectively.
  • Reference numeral 100 denotes a long thick groove formed in the outsole 1 and is set so that the movement locus 101 approaches the long axis 1A (FIG. 2).
  • FIG. 4C shows the distribution of the frictional force F measured by the inventor.
  • the force F will act in a direction close to the inclination B2 with respect to the long axis 1A.
  • the movement trajectory 101 of FIGS. 4A and 4B is directed to the outer side 12 of the foot just before the toe leaves, so that the force F acts in a direction close to the inclination B1 of the first area AM1 of FIG. right.
  • the area is set to a half of the area near the center.
  • the sub-region AS defined by a length of 5% of the length of the major axis 1A from the rear end of the main region AM toward the rear of the forefoot 1F of the inner side 11 toward the rear is contacted with the main region AM.
  • the sole 1 has.
  • the area of the ground contact surface 10 of the plurality of protrusions 1P is set to a half of the half of the sub-region AS.
  • the outer side 12 of the outsole 1 may be provided with a plurality of other protrusions 1Q extending in the laterally or oblique direction.
  • the outer side 12 may be provided with a plurality of protrusions 1Q that are vertically long and extend in the front-rear direction or the oblique front-rear direction.
  • the outsole 1 in FIG. 2 further includes an oblique groove 1G defined between a plurality of other protrusions 1Q having a grounding surface 10 that contacts the road surface.
  • the plurality of other protrusions 1Q and the oblique grooves 1G extend obliquely in the front-rear direction in at least a part of the front half portion of the front foot portion 1F on the outer side 12 of the foot, and extend toward the outer edge of the outsole 1 as they extend forward.
  • An angle B3 formed by the protrusion 1Q and the oblique groove 1G and the long axis 1A of the outsole 1 may be set in a range of 20 ° to 45 °.
  • An angle B5 formed by the inner protrusion 1P and the outer protrusion 1Q may be set in a range of 10 ° to 60 °.
  • the structure of the front half portion of the front foot portion 1F will increase the frictional force between the outsole 1 and the road surface when the load moves and leaves along the locus 101 shown in FIGS. 4A and 4B. .
  • another plurality of protrusions 1Q and oblique grooves 1G are provided at the rear end portion of the outer side 12 of the outsole 1 in FIG.
  • the protrusions 1Q and the oblique grooves 1G at the rear end portion of the outer side 12 have an inclination so as to move away from the long axis 1A as it goes rearward.
  • Such a structure of the rear end portion will exert a large frictional force on a dry road surface during a first strike.
  • the area required for kicking out is a range of about 40 mm square, and the vertical load applied at that time is around 800 N. That is, it is considered that the vertical load is about 0.5 Mpa.
  • the protrusion of the ridge is a mixture of the bending deformation of FIG. 10B and the shear deformation of FIG. 10C.
  • it is effective to suppress bending deformation of the ridge and promote shear deformation.
  • the contact area ratio is a dimensionless parameter obtained by dividing the actual contact area by the area of the surface of the ridge.
  • the contact area ratio is 1, it means that the entire protrusion surface is in contact with the floor surface.
  • the relationship between the parameter Rs, the contact area ratio, and the friction coefficient can be expressed by logarithmic approximation. From this, it can be determined that the contact area can be predicted for the protrusion having a predetermined shape by using the parameter Rs.
  • the friction coefficient Fc was calculated according to the following procedures (1) to (5).
  • (1) The total area of the flat surface of the ridge in a 40 mm ⁇ 40 mm region is calculated.
  • the dimensionless parameter Rs is calculated based on the set dimension of the ridge.
  • the average contact pressure is calculated by dividing the vertical load 800N by the contact area calculated in the procedure (3).
  • the friction coefficient Fc is calculated by substituting the average contact pressure into the power approximation formula shown in FIG. 10A.
  • the initial elastic modulus (Young's modulus) Ea of the outsole material is divided by the shear elastic modulus G when determining the parameter Rs. There is no effect on the calculation. Further, the initial elastic modulus (Young's modulus) Em of the midsole material is not included in the calculation formula. However, in consideration of the actual deformation behavior of the sole, the initial elastic modulus (Young's modulus) Ea of the outsole material is generally set to about 1 to 5 Mpa, and the initial elastic modulus (Young's modulus) Em of the midsole material is set to about 0.1. It would be preferable to set it to about 5 to 1.0 MPa.
  • FIG. 12A shows the shape of a hypothetical sample used for calculating the friction coefficient Fc.
  • the shape of this sample approximates the shape of the ridge of Example 1 of FIG. 2 and Example 2 of FIG. 5A. Therefore, the width Pw and length of the ground contact surface 10 of the ridge 1P set as follows: The value of a parameter such as Pl could be applied in both the above embodiments. In the following calculations, the friction coefficient Fc on a dry surface was calculated.
  • the friction coefficient Fc was calculated while changing the depth Ld of the longitudinal groove and the width Pw of the ridge and fixing other parameters to the following values.
  • Mt Midsole thickness 14 (mm)
  • Bt Outsole base thickness 2 (mm)
  • Lw Vertical groove width 0.5 (mm)
  • Pl Length of ridge 19 (mm)
  • Wd Horizontal groove depth 1 (mm)
  • Ww width of lateral groove 1 (mm)
  • FIG. 12B shows the value of the friction coefficient Fc when a thrust is applied along the longitudinal direction of the ridge 1P
  • FIG. 13 shows that when a force is applied along the width of the ridge 1P. .
  • the ratio Pw / Ld of the width Pw of the ground contact surface of the protrusion 1P to the depth Ld of the longitudinal groove is 2 If it is less than double or triple, the value of the friction coefficient Fc is remarkably lowered as indicated by a thick line in the chart. Therefore, the ratio Pw / Ld is preferably 2 times or more, and more preferably 3 times or more.
  • the thickness of the outsole 1 is preferably thin in consideration of the speed and efficiency of running and walking.
  • the thickness of the outsole 1 is thick. Accordingly, in the case of competition or general running, the thickness of the outsole 1 is preferably about 1.0 mm to 5.0 mm.
  • the depth Ld of the longitudinal groove is preferably 0.2 to 2.5 mm, considering the wear of the outsole 1, the thickness of the outsole 1, and prevention of sudden bending, and is preferably 0.4 to 2.0 mm. Is more preferred, with 0.5-1.5 mm being most preferred.
  • the ratio Pw / Ld may be more preferably 15 times or less in relation to the most preferable range of the depth Ld of the longitudinal groove.
  • the slenderness ratio Ea ⁇ (Pw / Ld) 2 derived from Euler's formula is larger than 4/3. The value is preferred.
  • FIG. 14 shows values obtained by calculating the friction coefficient Fc while changing the width Lw of the longitudinal groove and the length Pl of the ridge, and fixing other parameters to the following values. Note that the calculation examples in FIGS. 14 to 25 are calculated for the case where a propulsive force is applied along the longitudinal direction of the protrusion 1P.
  • Mt Midsole thickness 14 (mm)
  • Bt Outsole base thickness 2 (mm)
  • Ld depth of longitudinal groove 1 (mm)
  • Pw ridge width 5 (mm)
  • Wd Horizontal groove depth 1 (mm)
  • Ww width of lateral groove 1 (mm)
  • the friction coefficient Fc decreases as the longitudinal groove width Lw increases, while the friction coefficient Fc increases as the protrusion length Pl increases.
  • the width Lw of the longitudinal groove is preferably 0.05 to 1.5 mm. 0 mm would be most preferred.
  • the friction coefficient Fc is close to the value when Pl is infinite when the length Pl of the protrusion exceeds 15 mm. Therefore, it is preferable that the length Pl of the protrusion length is set to 15 mm or more and not more than the length over the entire length of the sole.
  • FIG. 15 shows values obtained by changing the values of the protrusion width Pw and the protrusion length Pl and fixing the other parameters to the following values and calculating the friction coefficient Fc.
  • Mt Midsole thickness 14 (mm)
  • Bt Outsole base thickness 2 (mm)
  • Ld depth of longitudinal groove 1 (mm)
  • Lw Vertical groove width 0.5 (mm)
  • Wd Horizontal groove depth 1 (mm)
  • Ww width of lateral groove 1 (mm)
  • the width Pw of the ridge is preferably 3-15 mm, more preferably 3.5-12 mm, considering the above-mentioned side slip. 10 mm would be most preferred.
  • FIG. 16 shows values obtained by changing the values of the width Pw of the ridge and the width Lw of the longitudinal groove, the other parameters are fixed to the following values, and the friction coefficient Fc is calculated.
  • Mt Midsole thickness 14 (mm)
  • Bt Outsole base thickness 2 (mm)
  • Ld depth of longitudinal groove 1 (mm)
  • Pl Length of ridge 27 (mm)
  • Wd Horizontal groove depth 1 (mm)
  • Ww width of lateral groove 1 (mm)
  • the ratio Pw / Ld is set to 2 times or more, preferably 4 times or more. Note that the ratio Pw / Ld is set to 100 times or less in consideration of manufacturing and the problem of skid.
  • FIG. 17 shows values obtained by changing the length ratio Pl / Pw and the width ratio Pw / Lw, fixing the other parameters to the following values, and calculating the friction coefficient Fc.
  • Mt Midsole thickness 14 (mm)
  • Bt Outsole base thickness 2 (mm)
  • Ld depth of longitudinal groove 1 (mm)
  • Wd Horizontal groove depth 1 (mm)
  • Ww width of lateral groove 1 (mm)
  • the values of the friction coefficient Fc are calculated to be the same value when Pl / Pw is 1.5 times and 1.8 times.
  • the accurate ground contact area increases as the length ratio Pl / Pw increases, and Pl / Pw is set to 1.8 times or more.
  • the values of the friction coefficient Fc are the same when the length ratio Pl / Pw is 5 times and when it is 200 times. Therefore, the length ratio Pl / Pw is preferably 4 times or more, and more preferably 5 times or more.
  • the width ratio Pw / Lw is set to 2 times or more, preferably 4 times to 100 times.
  • the friction coefficient Fc was calculated by changing various parameters. ex. 502, 503, 508, and 509 have low coefficient of friction Fc as surrounded by the thick line in FIG. These four ex.
  • the common point of the parameters in is that the lateral groove depth Wd is larger than in the other examples. That is, generally, the lateral groove depth Wd is preferably 0 to 1.5 mm, and more preferably 0 to 1.0 mm.
  • the calculated value of the friction coefficient Fc is shown.
  • the basic width Pw of the protrusion 1P in FIG. 19A was set to 5.0 mm.
  • Mt Midsole thickness 14 (mm)
  • Bt Outsole base thickness 2 (mm)
  • Pl Length of ridge 20 (mm)
  • Wd Horizontal groove depth 1 (mm)
  • Ww width of lateral groove 1 (mm)
  • the longitudinal groove 1L may have the dovetail shape of FIG. 19A, but the friction coefficient Fc decreases in the case of the V-shaped cross section of FIG. 19B. That is, the value of the friction coefficient Fc is low in the portion surrounded by the thick line in FIG. 19B. The reason is that if the longitudinal groove 1L has a V-shaped cross section, the area of the ground contact surface 10 of the protrusion 1P decreases.
  • each groove Gs extends in the longitudinal direction of the ridge 1P.
  • the groove Gs extends in the width direction of the ridge 1P. In the case of FIG. It extends.
  • the groove Gs when there is a thin shallow groove Gs, it can be seen that when the depth Vd of the groove Gs is 0.4 mm, the value of the friction coefficient Fc is greatly reduced. Therefore, when the groove Gs is provided in the lateral direction on the surface of the protrusion 1P, it is preferably set to 0.4 mm or less. In other words, it can be considered that the lateral groove shallower than at least 0.3 mm is not included in the lateral groove 1W of the present invention, and the presence of the shallow lateral groove may be ignored.
  • the groove Gs extending in the shallow oblique direction can be considered in the same manner as the case where the shallow lateral groove Gs in FIG. 22 is present.
  • FIG. 24 shows the result of calculating the value of the friction coefficient Fc when a plurality of protrusions Pp are present on the surface of the protrusion 1P.
  • the following parameters were fixed, and the friction coefficient Fc was calculated by changing the height of the protrusion Pp and the ratio of the total area of the protrusion Pp to the area of the protrusion 1P.
  • Mt Midsole thickness 14 (mm)
  • Bt Outsole base thickness 2 (mm)
  • Ld depth of longitudinal groove 1 (mm)
  • Lw Vertical groove width 0.5 (mm)
  • Pw ridge width 5 (mm)
  • Pl Length of ridge 20 (mm)
  • Wd Horizontal groove depth 1 (mm)
  • Ww width of lateral groove 1 (mm)
  • FIG. 25 shows the value of the coefficient of friction Fc when a small rectangular parallelepiped dimple Dp or small protrusion (Dp) is provided on the surface of the protrusion 1P.
  • Dp small rectangular parallelepiped dimple
  • Dp small protrusion
  • Mt Midsole thickness 14 (mm)
  • Bt Outsole base thickness 2 (mm)
  • Ld depth of longitudinal groove 1 (mm)
  • Lw Vertical groove width 0.5 (mm)
  • Pw ridge width 5 (mm)
  • Pl Length of ridge 20 (mm)
  • Wd Horizontal groove depth 1 (mm)
  • Ww width of lateral groove 1 (mm)
  • 26A to 26F show other arrangements and shapes of the protrusion 1P.
  • the protrusions 1P may be arranged in a staggered manner.
  • the protrusions 1P may have different widths Pw and lengths Pl.
  • the planar shape of the protrusion 1P may be a trapezoid or a parallelogram.
  • the width of the protrusion 1P can be obtained by an average value of the width Pwf at the front end and the width Pwb at the rear end.
  • the protrusion 1P may have a barrel shape or conversely a shape in which the center is constricted.
  • the protrusion 1P and the longitudinal groove 1L may be corrugated.
  • the longitudinal groove 1L includes a transverse groove component, which may cause a reduction in the friction coefficient Fc.
  • FIG. 26F shows a case where a lateral groove is formed by the notch 1C of the protrusion 1P. If the depth of the notch 1C exceeds 0.5 mm and the width of the notch 1C is 0.5 times or more the width Pw of the protrusion 1P, the friction coefficient Fc will be reduced. On the other hand, when the depth of the notch 1C is 0.5 mm or less and the width of the notch 1C is less than 0.5 times the width Pw of the ridge 1P, the friction coefficient Fc is small and the present invention is small. Can be considered to be included.
  • the midsole may not be provided.
  • the outsole 1 only needs to be provided in at least a part of the forefoot part and / or the rear foot part, and even if a part of the forefoot part and / or the rear foot part is missing, that is, a longitudinal groove.
  • the midsole 2 may be exposed in the lateral groove.
  • the “depth of the longitudinal groove” is calculated from “the depth of the groove provided in the outsole 1”, It may be calculated from the “depth of the groove provided up to the midsole 2”.
  • the ridge of the present invention may be on either the front foot portion or the rear foot portion inside the foot.
  • the above-described embodiments and simulation examples may be applied. Accordingly, such changes and modifications are to be construed as within the scope of the present invention as defined by the claims.
  • the present invention can be applied to shoe soles suitable for running and walking.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

L'invention concerne une semelle d'usure de chaussure, la semelle d'usure comportant : une pluralité de saillies qui ont une surface de contact de sol, celle-ci entrant en contact avec le sol d'une surface de route ; au moins une rainure verticale qui est délimitée entre la pluralité de saillies. Dans au moins une région de chacune d'une partie d'avant-pied et d'une partie d'arrière-pied du côté médian d'un pied, la pluralité de saillies et la rainure verticale s'étendent dans la direction avant-arrière ou dans une direction avant-arrière diagonale, et forment un angle de 0° à 35° avec l'axe principal de la semelle d'usure. Le rapport longueur/largeur de la surface de contact de sol de la pluralité de saillies est de 1,8/200, et la largeur de la surface de contact avec le sol des saillies est de 2 à 100 fois la largeur de la rainure verticale.
PCT/JP2014/062818 2014-05-14 2014-05-14 Semelle d'usure de chaussure WO2015173904A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2014555003A JP5710083B1 (ja) 2014-05-14 2014-05-14 靴のアウトソール
US15/309,769 US20170150782A1 (en) 2014-05-14 2014-05-14 Outsole of Shoe
PCT/JP2014/062818 WO2015173904A1 (fr) 2014-05-14 2014-05-14 Semelle d'usure de chaussure
EP14891778.4A EP3143892B1 (fr) 2014-05-14 2014-05-14 Semelle d'usure de chaussure

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Application Number Priority Date Filing Date Title
PCT/JP2014/062818 WO2015173904A1 (fr) 2014-05-14 2014-05-14 Semelle d'usure de chaussure

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EP (1) EP3143892B1 (fr)
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WO (1) WO2015173904A1 (fr)

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EP3143892B1 (fr) 2018-09-19
EP3143892A4 (fr) 2017-12-27
US20170150782A1 (en) 2017-06-01
EP3143892A1 (fr) 2017-03-22
JP5710083B1 (ja) 2015-04-30

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