EP3406156B1 - Schuhsohle und schuh - Google Patents

Schuhsohle und schuh Download PDF

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Publication number
EP3406156B1
EP3406156B1 EP16886431.2A EP16886431A EP3406156B1 EP 3406156 B1 EP3406156 B1 EP 3406156B1 EP 16886431 A EP16886431 A EP 16886431A EP 3406156 B1 EP3406156 B1 EP 3406156B1
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EP
European Patent Office
Prior art keywords
shoe sole
antislip
shoe
friction coefficient
antislip protrusions
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.)
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EP16886431.2A
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English (en)
French (fr)
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EP3406156A1 (de
EP3406156A4 (de
Inventor
Tomohiro Nozaki
Takashi TAKUBO
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Nisshin Rubber Co Ltd
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Nisshin Rubber Co Ltd
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Publication date
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Publication of EP3406156A1 publication Critical patent/EP3406156A1/de
Publication of EP3406156A4 publication Critical patent/EP3406156A4/de
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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
    • A43B13/223—Profiled soles
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/14—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
    • A43C—FASTENINGS OR ATTACHMENTS OF FOOTWEAR; LACES IN GENERAL
    • A43C15/00—Non-skid devices or attachments

Definitions

  • the present disclosure relates to a shoe sole that exhibits excellent slip resistance on an ice surface, a shoe having the shoe sole, and an antislip member to which the technique of the shoe sole is applied.
  • JP 3096646 U describes a shoe-sole antislip structure (claim 1 in JP 3096646 U ).
  • the antislip structure includes the shoe sole provided under a shoe body and multiple suction cups having conical indentations and is characterized by the suction cups integrated with the shoe sole.
  • WO 2006/003740 describes that the antislip structure allows the suction cups to catch the ground with a suction force, so that the effect of slip resistance can be obtained on a wet ground surface, a snowy road, a frozen ground surface, or a ground surface with oil-based liquid as well as a ground surface covered with dry asphalt, soil, grass, or the like (paragraph [0016] in WO 2006/003740 ).
  • WO 2006/003740 describes an antislip shoe sole having a plurality of ground convex portions formed at predetermined intervals on the ground side of a base part in the longitudinal direction of the base part.
  • Each of the ground convex portions is V-shaped in cross section, has a tilted reinforcing part in the proximal part connecting to the base part, and is composed of elastomeric polymers having JIS-A hardness of 45 to 80 at 20°C (Claim 1 in WO 2006/003740 ).
  • WO 2006/003740 also describes that the antislip shoe sole enables stable walking even on a slippery floor and the like (paragraph [0021] in WO 2006/003740 ).
  • US 2005/034798 A1 discloses a tire tread, in the surface of which stepped recesses are formed. These allow recesses, fluids, solids, and fluid-solid mixtures to be dispersed, thereby enhancing a mechanical grip of the tire.
  • WO 2015/121884 A1 discloses an anti-slip device according to the preamble of claim 1 consisting of a gripping element and an elastic central joint bound to a shoe sole.
  • the joint mechanically connects the gripping element with the slip surface in an elastic way.
  • the gripping element includes a funnel-shaped recessed portion formed on the underside of the gripping element.
  • antislip shoe soles do not always exhibit excellent slip resistance. This is because such antislip shoe soles are characterized in that a friction force (a friction force received by a shoe sole from a walking surface, the same hereinafter) instantly peaks immediately after the bracing of feet, for example, at the start of kicking the walking surface, and then the friction force rapidly decreases.
  • a walker wearing shoes with such characteristic shoe soles tends to feel that slip resistance (friction force) produced immediately after the bracing of feet may be kept thereafter, and thus the walker may unconsciously keep kicking a walking surface with a strong force. Even in this case, the walker hardly slips or falls on a walking surface under satisfactory conditions, e.g., on a dry road. However, on a poor walking surface, e.g., an ice surface, the walker is likely to slip and fall.
  • An object of the present disclosure is to provide a shoe sole that allows continuous bracing from a moment immediately after the start of bracing and can exhibit excellent slip resistance in walking on a poor walking surface, e.g., an ice surface.
  • Another object of the present disclosure is to provide shoes having the shoe soles.
  • Still another object of the present disclosure is to provide an antislip member to which the technique of the shoe sole is applied.
  • a dynamic friction coefficient on an ice surface and “a maximum static friction coefficient on the ice surface” mean friction coefficients measured by a measuring method in accordance with ISO13287 "slip resistance tests on shoe soles", specifically, friction coefficients measured in steps 1 to 6 as will be discussed below.
  • the cycle of the following steps 1 to 6 is repeated ten times in total, and then the mean value of maximum static friction coefficients and the mean value of dynamic friction coefficients in five measurements in total from the sixth to the tenth measurements are used as a formal maximum static friction coefficient and a formal dynamic friction coefficient.
  • a shoe sole is placed on a horizontal ice surface (a solid ice surface kept at 0°C.
  • the ice surface is supported by a force F 2 , which will be discussed later, so as to slide in the horizontal direction).
  • the shoe sole is held with a tool or the like so as not to move in the horizontal direction.
  • a force F 1 (500 N) is vertically applied downward to the top surface of the shoe sole so as to press the shoe sole to the ice surface.
  • the force F 2 is horizontally applied to the ice surface while the force F 1 of above (2) is continuously applied to the shoe sole, and then the force F 2 is gradually increased.
  • the force F 2 is measured from the start of application of the force F 2 in step 3 to the start of horizontal sliding on the ice surface.
  • the peak value during the measurement (the maximum value of the force F 2 ) is divided by the force F 1 to obtain a value as "the maximum static friction coefficient on the ice surface.”
  • the force F 2 is increased until a horizontal sliding speed on the ice surface reaches 300 mm/s.
  • the force F 2 is measured when the horizontal sliding speed on the ice surface is stabilized at 300 mm/s.
  • the mean value of the force F 2 during the measurement (the mean value between 0.3 second and 0.6 second after the start of application of the force F 2 ) is divided by the force F 1 to obtain a value as "the dynamic friction coefficient on the ice surface.”
  • the shoe sole is configured such that the dynamic friction coefficient on the ice surface is higher than the maximum static friction coefficient on the ice surface, allowing continuous bracing from a moment immediately after the start of bracing.
  • the shoe sole can be provided so as to exhibit excellent slip resistance even in walking on a poor walking surface, e.g., walking on an ice surface.
  • a specific value of "the dynamic friction coefficient on an ice surface” is not particularly limited but is preferably 0.25 or higher. This can improve the slip resistance of the shoe sole on an ice surface, achieving safer walking.
  • the dynamic friction coefficient on an ice surface is more preferably 0.30 or higher, is further preferably 0.35 or higher, and is most preferably 0.37 or higher.
  • the dynamic friction coefficient on an ice surface can be set at 0.39 or higher.
  • the dynamic friction coefficient on the ice surface is higher than the maximum static friction coefficient on the ice surface.
  • This characteristic can be achieved by using a structure in which a plurality of antislip protrusions are formed downward with undersides of the antislip protrusions coming into contact with the ground, the antislip protrusions each including a funnel-shaped recessed portion formed on the underside of the antislip protrusion, each recessed portion including steps annularly formed on the inner surface of the recessed portion.
  • the shoe sole preferably includes drain holes for sucking water in the recessed portions and discharging the water to the surroundings of the shoe sole when the undersides of the antislip protrusions come into contact with the ground.
  • excellent slip resistance can be easily kept even on a poor walking surface, for example, during walking on a melting ice surface.
  • a plurality of protrusion rows are preferably disposed at predetermined intervals in the longitudinal direction of the shoe sole, the protrusion row including the antislip protrusions that are disposed along the width direction of the shoe sole while being spaced at predetermined intervals in the width direction of the shoe sole.
  • the front and rear positions of the antislip protrusions constituting the same protrusion row are preferably aligned.
  • this configuration is equivalent to the lattice pattern of the antislip protrusions 20 disposed in the width direction and the longitudinal direction of the shoe sole.
  • the antislip protrusions 20 disposed in a lattice pattern in the width direction and the longitudinal direction of the shoe sole can reduce the occurrence of snow or the like caught in a gap between the adjacent antislip protrusions. The reason will be discussed later.
  • the shoe sole of the present disclosure preferably includes a midsole part on the top surface of the shoe sole, the midsole part being made of a material having lower hardness than a shoe sole body (outsole part).
  • the characteristic continuous bracing from a moment immediately after the start of bracing
  • the shoe sole of the present disclosure preferably includes a midsole part on the top surface of the shoe sole, the midsole part being made of a material having lower hardness than a shoe sole body (outsole part).
  • the use of the shoe sole of the present disclosure is not particularly limited and thus the shoe sole can be provided for various shoes.
  • the shoe sole can be properly provided particularly for shoes for commuters, students, athletes, and workers in a cold district.
  • the shoe sole can be properly provided for, for example, work shoes in a skating rink and work shoes in a freezer.
  • the shoe sole of the present disclosure may be provided integrally with a shoe or detachably from an existing shoe.
  • the present disclosure can provide a shoe sole that allows continuous bracing from a moment immediately after the start of bracing and can exhibit excellent slip resistance for walking on a poor walking surface, e.g., walking on an ice surface.
  • shoes including the shoe soles can be provided and an antislip member can be provided to which the technique of the shoe sole is applied.
  • a shoe sole will be discussed as an example to illustrate the present disclosure.
  • the following configuration is not always used for shoe soles and can be properly used for other antislip members of a mat, a stick tip, gloves, and the like.
  • shoe soles according to six embodiments that is, first to sixth embodiments will be discussed.
  • the shoe sole according to the first embodiment will be mainly discussed.
  • the configuration of the shoe sole according to the first embodiment are properly usable for the shoe soles of other embodiments as long as the configuration is consistent with the shoe soles of other embodiments.
  • the configurations of the shoe sole of the second and third embodiments are properly usable for the shoe sole of the first embodiment as long as the configurations are consistent with the shoe sole of the first embodiment.
  • Fig. 1 is a bottom view illustrating a state of the shoe sole viewed from the bottom according to the first embodiment.
  • Fig. 2 illustrates a bottom view of the shoe sole viewed from the bottom according to the first embodiment and an enlarged view of a part A of the shoe sole in Fig. 1 .
  • Fig. 3 illustrates perspective views of an enlarged antislip protrusion on the shoe sole according to the first embodiment.
  • Fig. 3(a) illustrates the overall configuration of the antislip protrusion.
  • Fig. 3(b) indicates that the antislip protrusion of Fig. 3(a) is cut along a plane B parallel to a y-z plane.
  • the shoe sole of the first embodiment includes multiple antislip protrusions 20 formed downward on the bottom of a shoe sole body 10 (outsole part).
  • the shoe sole body 10 has a thickness of 2 to 30 mm.
  • the antislip protrusion 20 has an underside (an end face on the negative side in the z-axis direction) coming into contact with the ground (a surface coming into contact with a walking surface).
  • the antislip protrusions 20 are provided over the bottom of the shoe sole body 10.
  • the antislip protrusions 20 may be absent in an area that hardly comes into contact with the walking surface on the shoe sole body 10, that is, in an area that hardly contributes to improvement in slip resistance (for example, hatched parts in Fig. 1 (e.g. a part overlapping the arch of a foot on the shoe sole body 10 and an edge part of the shoe sole body 10)).
  • an area where the antislip protrusions 20 are absent at the bottom of the shoe sole body 10 may be referred to as "protrusion non-formation area”
  • an area where the antislip protrusions 20 are provided on the shoe sole body 10 may be referred to as "protrusion formation area.”
  • the number of antislip protrusions 20 per unit area is not particularly limited and varies according to, for example, the dimensions of the antislip protrusions 20. However, if the number of antislip protrusions 20 per unit area is extremely small, the total number of antislip protrusions 20 on the shoe sole body 10 also decreases, which may lead to difficulty in raising the maximum static friction coefficient and the dynamic friction coefficient of the shoe sole to required levels. Thus, the number of antislip protrusions 20 per unit area (a value in the protrusion formation area if the protrusion non-formation area is formed at the bottom of the shoe sole body 10, the same hereinafter) is typically at least 0.5 /cm 2 . The number of antislip protrusions 20 per unit area is preferably at least 0.8 /cm 2 and is more preferably at least 1 /cm 2 .
  • the number of antislip protrusions 20 per unit area is typically 10 /cm 2 or less.
  • the number of antislip protrusions 20 per unit area is preferably 5 /cm 2 or less, is more preferably 3 /cm 2 or less, and is further preferably 2 /cm 2 or less.
  • the number of antislip protrusions 20 per unit area is substantially equal over the bottom (protrusion formation area) of the shoe sole body 10.
  • the number of antislip protrusions 20 per unit area may vary among locations.
  • a width Wo ( Fig. 2 ) of a gap between the adjacent antislip protrusions 20 is not particularly limited. However, if the width Wo of the gap is too small, small stones, sand, or the like may be easily caught in the gap between the adjacent antislip protrusions 20. During bracing on the shoe sole, the antislip protrusions 20 are compressed in the height direction and are radially extended, which may lead to difficulty in ensuring desired slip resistance because of interference between the adjacent antislip protrusions 20.
  • the width W 0 of the gap (a minimum value is set if the width Wo of the gap varies among locations, the same in the subsequent sentences) is typically set at 0.1 mm or larger.
  • the width W 0 of the gap is preferably at least 0.3 mm and is more preferably at least 0.5 mm. If the width Wo of the gap is extremely large, the number of antislip protrusions 20 per unit area cannot be easily increased, which may lead to difficulty in ensuring desired slip resistance. Thus, the width W 0 of the gap (a maximum value is set if the width W 0 of the gap varies among locations, the same in the subsequent sentences) is typically set at 10 mm or less. The width W 0 of the gap is preferably 5 mm or less and is more preferably 3 mm or less.
  • the antislip protrusions 20 are integrally molded with the shoe sole body 10.
  • the molding materials of the shoe sole may be various rubbers, elastomers, and the like that are used for the outsole parts of shoe soles according to the related art. More specifically, the molding materials of the shoe sole may include a rubber compounding ingredient and at least one elastomeric polymer selected from the group consisting of a synthetic rubber, a natural rubber, a thermoplastic styrene-butadiene rubber (SBS), a styrene thermoplastic elastomer (SIS), an ethylene-vinyl acetate copolymer (EVA), polyurethane, and polyvinyl chloride.
  • SBS thermoplastic styrene-butadiene rubber
  • SIS styrene thermoplastic elastomer
  • EVA ethylene-vinyl acetate copolymer
  • polyurethane polyurethane
  • polyvinyl chloride polyvinyl chloride
  • the hardness of the shoe sole (the hardness of the outsole part) varies depending on the molding materials of the shoe sole and is not particularly limited. However, if the outsole part of the shoe sole is too soft, the strength of the antislip protrusions 20 may become hard to keep. Thus, if the outsole part of the shoe sole is made of rubber, the hardness of the outsole part (a value measured by an A hardness tester, also in the case of rubber) is typically at least 10, is preferably at least 20, is more preferably at least 30, and is further preferably at least 35.
  • the hardness of the outsole part (a value measured by an E hardness tester, also in the case of EVA) is preferably at least 10, is more preferably at least 20, and is further preferably at least 30. If the outsole part of the shoe sole is too hard, the antislip protrusions 20 are hard to elastically deform. Thus, the antislip protrusions 20 hardly deform along the walking surface, leading to difficulty in ensuring desired slip resistance. Moreover, the cushioning of the shoe sole may decrease so as to cause discomfort in wearing shoes.
  • the hardness of the outsole part is preferably 70 or less, is more preferably 60 or less, and is further preferably 50 or less.
  • the hardness of the outsole part is typically 70 or less, is preferably 60 or less, is more preferably 50 or less, and is further preferably 40 or less.
  • the antislip protrusions 20 are each formed into a columnar shape. As illustrated in Fig. 3(a) , on the shoe sole of the first embodiment, the antislip protrusion 20 is formed into a cylindrical shape. However, the shape of the antislip protrusion 20 is not limited to a cylinder and may be a polygonal column, e.g., a triangular prism, a quadratic prism, or a hexagonal column, an elliptic cylinder, or a combination thereof.
  • an outside diameter Do Fig. 3(a) ) of the antislip protrusion 20 is kept constant regardless of the height of the antislip protrusion 20.
  • the outside diameter D 0 of the antislip protrusion 20 may vary according to the height of the antislip protrusion 20.
  • the outer surface of the antislip protrusion 20 may be tapered.
  • the ratio Ho/Do of a height Ho ( Fig. 3(a) ) to the outside diameter D 0 ( Fig. 3(a) ) of the antislip protrusion 20 varies depending on the molding materials, or the like of the antislip protrusion 20.
  • the ratio Ho/Do is not particularly limited. However, if the ratio H 0 /D 0 is too small, the antislip protrusions 20 may be flattened and lead to difficulty in ensuring desired slip resistance.
  • the ratio H 0 /D 0 is typically set at 0.1 or larger.
  • the ratio H 0 /D 0 is preferably at least 0.2 and is more preferably at least 0.3.
  • the ratio Ho/Do is typically set at 3 or less.
  • the ratio H 0 /D 0 is preferably 2 or less and is more preferably 1 or less.
  • the outside diameter Do ( Fig. 3(a) ) of the antislip protrusion 20 is typically set at 2 mm or larger.
  • the outside diameter D 0 is preferably at least 5 mm and more specifically, the outside diameter Do can be set at 7 mm or larger.
  • the outside diameter Do of the antislip protrusion 20 is typically 30 mm or less and is preferably 20 mm or less. More specifically, the outside diameter D 0 can be set at 15 mm or less.
  • the height H 0 ( Fig. 3(a) ) of the antislip protrusion 20 is typically at least 1 mm and is preferably at least 2 mm. More specifically, the height H 0 can be set at 3 mm or larger.
  • the height H 0 of the antislip protrusion 20 is typically 15 mm or less and is preferably 10 mm or less. More specifically, the height Ho can be set at 7 mm or less.
  • a funnel-shaped recessed portion 21 that is circular in cross section is formed on the underside of the antislip protrusion 20.
  • the antislip protrusions 20 can be sucked like suction cups to the walking surface.
  • steps 22 are formed like rings on the inner surface of the recessed portion 21.
  • slip resistance can be ensured from a moment immediately after the start of bracing on the shoe sole.
  • the steps 22 are annularly formed and thus slip resistance can be exhibited in all directions.
  • the shoe sole of the first embodiment can achieve excellent slip resistance in lateral bracing (e.g., in side steps) as well as in longitudinal bracing.
  • the number of steps 22 is not particularly limited. However, if the number of steps 22 is small, the antislip protrusions 20 are likely to be worn so as to eliminate the steps 22. This may lead to difficulty in ensuring desired slip resistance.
  • the number of steps 22 is preferably two or more and is more preferably three or more.
  • the number of steps 22 is not particularly limited but an extremely large number of steps 22 may lead to difficulty in molding the antislip protrusions 20.
  • the number of steps 22 is typically set at ten or less.
  • the number of steps 22 is preferably seven or less and is more preferably five or less.
  • the ratio H 1 /W 1 of a height H 1 ( Fig. 3(b) ) of the step 22 to a width W 1 ( Fig. 3(b) ) of the step 22 is not particularly limited. However, if the ratio H 1 /W 1 is too small, the inclination of the inner surface of the recessed portion 21 is inevitably reduced, so that the antislip protrusion 20 is less likely to be sucked onto the walking surface. Thus, the ratio H 1 /W 1 is typically set at 0.1 or larger. The ratio H 1 /W 1 is preferably at least 0.3 and is more preferably at least 0.5. The steps 22 are located deeper from the underside of the antislip protrusion 20 as the ratio H 1 /W is larger.
  • the ratio H 1 /W 1 is typically set at 3 or less.
  • the ratio H 1 /W 1 is preferably 2 or less and is more preferably 1.5 or less.
  • the width W 1 ( Fig. 3(b) ) of the step 22 varies depending on, for example, the outside diameter Do of the antislip protrusion 20 or the number of steps 22 but is typically set at 0.3 mm or larger.
  • the width W 1 is preferably at least 0.4 mm and more specifically, the width W 1 can be set at 0.5 mm or larger.
  • the width W 1 of the step 22 is typically set at 5 mm or less and is preferably set at 3 mm or less. More specifically, the width W 1 is set at 1 mm or less. If the two or more steps 22 are provided, the width W 1 of the step 22 may be equally set for all the steps 22 or may vary among the steps.
  • the height H 1 of the step 22 is typically set at 0.1 mm or larger and is preferably set at 0.2 mm or larger, though the height H 1 may vary depending on, for example, the height Ho of the antislip protrusion 20 or the number of steps 22. More specifically, the height H 1 can be set at 0.3 or larger. Alternatively, the height H 1 of the step 22 is typically set at 3 mm or less and is preferably set at 2 mm or less. More specifically, the height H 1 can be set at 1 mm or less. If the two or more steps 22 are provided, the height H 1 of the step 22 may be equally set for all the steps 22 or may vary among the steps.
  • a drain hole 23 is provided at the center of the recessed portion 21 of the antislip protrusion 20.
  • the drain hole 23 communicates with a drain passage 11 provided in the shoe sole body 10.
  • the drain passage 11 communicates with the outer surface (side) of the shoe sole body 10.
  • a recessed groove formed on the top surface (a front side in the z-axis direction) of the shoe sole body 10 serves as the drain passage 11. Since a midsole part (not illustrated) is fixed to the top surface of the shoe sole body 10 (outsole part) as will be discussed later, the upper side of the drain passage 11 (recessed groove) is covered with the midsole part.
  • a diameter D 1 ( Fig. 3(a) ) of the drain hole 23 varies depending on, for example, the diameter Do of the antislip protrusion 20, the number of steps 22, and the width W 1 of the steps 22 and is not particularly limited. However, if the diameter D 1 of the drain hole 23 is too small, small stones or sand may be easily caught in the drain holes 23. Thus, the diameter D 1 of the drain hole 23 is typically set at 0.5 mm or larger. The diameter D 1 of the drain hole 23 is preferably at least 1 mm and is more preferably at least 1.5 mm. If the diameter D 1 of the drain hole 23 is too large, the outside diameter D 1 of the antislip protrusion 20 also inevitably increases.
  • the diameter D 1 of the drain hole 23 is typically set at 20 mm or smaller.
  • the diameter D 1 of the drain hole 23 is preferably 10 mm or smaller and is more preferably 7 mm or smaller.
  • a dynamic friction coefficient (denoted as ⁇ 1 ) on an ice surface is higher than a maximum static friction coefficient (denoted as ⁇ 0 ) on the ice surface.
  • the ratio ⁇ 1 / ⁇ 0 of the dynamic friction coefficient ⁇ 1 to the maximum static friction coefficient ⁇ 0 on the ice surface is not particularly limited as long as the ratio is larger than 1.
  • the ratio ⁇ 1 / ⁇ 0 is preferably at least 1.1 and is more preferably at least 1.2.
  • the ratio ⁇ 1 / ⁇ 0 on the ice surface can be also set at 1.3 or larger.
  • the ratio ⁇ 1 / ⁇ 0 is not particularly limited but is estimated to be actually limited to about 1.5 to 2 on the ice surface.
  • the specific value of the dynamic friction coefficient ⁇ 1 on the ice surface is not particularly limited. However, if the dynamic friction coefficient ⁇ 1 is too small, excellent slip resistance cannot be expected. Thus, the dynamic friction coefficient ⁇ 1 on the ice surface is typically set at 0.3 or higher. As described above, the dynamic friction coefficient ⁇ 1 on the ice surface is preferably at least 0.25, is more preferably at least 0.30, is further preferably at least 0.35, and is optimally at least 0.37. On the shoe sole of the first embodiment, as will be discussed later, the dynamic friction coefficient ⁇ 1 on the ice surface can be also set at 0.39 or higher. The dynamic friction coefficient ⁇ 1 is preferably increased but, in practice, setting the dynamic friction coefficient ⁇ 1 to 0.7 or higher seems to be hard on an ice surface.
  • the midsole part (not illustrated) is preferably provided on the top surface of the shoe sole body 10.
  • the hardness of the midsole part is typically set lower than that of the shoe sole body 10. This can easily exhibit a feature properly on the actual shoes so as to continuously perform bracing from a moment immediately after the start of bracing.
  • the molding materials of the midsole part are not particularly limited as long as the midsole part is softer than the outsole part.
  • the molding materials of the midsole part may be various rubbers and elastomers that are used for the midsole parts of the shoe soles according to the related art.
  • the molding materials of the midsole part may include a rubber compounding ingredient and at least one elastomeric polymer selected from the group consisting of a synthetic rubber, a natural rubber, a thermoplastic styrene-butadiene rubber (SBS), a styrene thermoplastic elastomer (SIS), an ethylene-vinyl acetate copolymer (EVA), polyurethane, and polyvinyl chloride.
  • SBS thermoplastic styrene-butadiene rubber
  • SIS styrene thermoplastic elastomer
  • EVA ethylene-vinyl acetate copolymer
  • polyurethane polyurethane
  • polyvinyl chloride polyvinyl chloride
  • the hardness of the midsole part is not particularly limited to a specific value as long as the hardness is lower than that of the outsole part.
  • the hardness is preferably lower than that of the outsole part by at least 5 to 10 degrees or about 15 to 20 degrees in some cases.
  • the hardness of the midsole part (a value measured by an E hardness tester, also in the case of EVA) is preferably 50 or less, is more preferably 40 or less, and is further preferably 30 or less.
  • the lower limit of the midsole part is not particularly limited. However, if the midsole part is too soft, the strength of the midsole part may not be kept.
  • the midsole part is made of EVA
  • the hardness of the midsole part is preferably at least 5, is more preferably at least 10, and is further preferably at least 15.
  • Fig. 4 is a bottom view illustrating the shoe sole viewed from the bottom according to the second embodiment and is an enlarged view of a part corresponding to the part A of the shoe sole in Fig. 1 .
  • Fig. 5 illustrates perspective views of an enlarged antislip protrusion on the shoe sole according to the second embodiment.
  • Fig. 5(a) illustrates the overall configuration of the antislip protrusion.
  • Fig. 5(b) indicates that the antislip protrusion of Fig. 5(a) is cut along a plane B parallel to a y-z plane.
  • the shoe sole of the first embodiment has the cylindrical antislip protrusions 20.
  • antislip protrusions 20 are each shaped like a quadrangular prism.
  • drain holes 23 are formed like squares in cross section and recessed portions 21 are formed into funnel-shaped squares in cross section.
  • steps 22 are shaped like square frames.
  • the antislip protrusions 20 can be advantageously disposed with a higher density than on the shoe sole of the first embodiment. Furthermore, multiple linear parts are obtained on the steps 22 and thus slip resistance can be easily raised in a direction perpendicular to the linear parts. Configurations not particularly specified in the shoe sole of the second embodiment may be substantially identical to those of the shoe sole of the first embodiment.
  • Fig. 6 is a bottom view illustrating the shoe sole viewed from the bottom according to the third embodiment and an enlarged view of a part corresponding to the part A of the shoe sole in Fig. 1 .
  • Fig. 7 illustrates perspective views of an enlarged antislip protrusion on the shoe sole according to the third embodiment.
  • Fig. 7(a) illustrates the overall configuration of the antislip protrusion.
  • Fig. 7(b) indicates that the antislip protrusion of Fig. 7(a) is cut along a plane B parallel to a y-z plane.
  • the shoe sole of the third embodiment has antislip protrusions 20 each shaped like hexagonal columns. Accordingly, on the shoe sole of the third embodiment, drain holes 23 are formed like hexagons in cross section and recessed portions 21 are formed into funnel-shaped hexagonal shapes in cross section. Moreover, the steps 22 are shaped like hexagonal frames. In this way, the provision of the antislip protrusions 20 shaped like hexagonal columns allows a dynamic friction coefficient ⁇ 1 on an ice surface to exceed a maximum static friction coefficient ⁇ 0 on the ice surface.
  • the antislip protrusions 20 can be advantageously disposed with a high density as on the shoe sole of the second embodiment. Furthermore, multiple linear parts are obtained on the steps 22 and thus slip resistance can be easily raised in a direction perpendicular to the linear parts. Configurations not particularly specified in the shoe sole of the third embodiment may be substantially identical to those of the shoe soles of the first and second embodiments.
  • Fig. 12 is a bottom view illustrating a state of the shoe sole viewed from the bottom according to the fourth embodiment.
  • Fig. 13 is a bottom view illustrating the shoe sole viewed from the bottom according to the fourth embodiment and is an enlarged view of a part corresponding to the part A of the shoe sole in Fig. 12 .
  • Fig. 14 is a side view illustrating a state of the shoe sole walking with a shoe including the shoe sole according to the fourth embodiment.
  • the shoe sole of the fourth embodiment has antislip protrusions 20 shaped like quadratic prisms.
  • the antislip protrusions 20 on the shoe sole of the fourth embodiment are identical in configuration to the antislip protrusions 20 ( Fig. 5 ) on the shoe sole of the second embodiment.
  • each of the antislip protrusions 20 adjacent to each other in the width direction (x-axis direction) of the shoe sole is displaced by a half pitch in the longitudinal direction (y-axis direction) of the shoe sole as illustrated in Fig.
  • the antislip protrusions 20 adjacent to each other in the width direction (x-axis direction) of the shoe sole are not displaced in the longitudinal direction (y-axis direction) of the shoe sole as illustrated in Fig. 13 .
  • multiple protrusion rows L are disposed at predetermined intervals in the longitudinal direction (y-axis direction) of the shoe sole, the protrusion row L including the antislip protrusions disposed along the width direction (x-axis direction) of the shoe sole at predetermined intervals in the width direction (x-axis direction) of the shoe sole.
  • the antislip protrusions 20 disposed in a lattice pattern can improve the slip resistance of the shoe sole. Even in walking on a snow surface, in particular, the antislip protrusions 20 can exhibit desired slip resistance.
  • the shoe sole is bent around a ground surface when the shoe sole touches and kicks the ground during walking, so that a width W 0 ' of the gap ⁇ increases from the original width between the antislip protrusions 20 adjacent to each other in the longitudinal direction and the gap ⁇ penetrates in the width direction of the shoe sole.
  • a width W 0 ' of the gap ⁇ increases from the original width between the antislip protrusions 20 adjacent to each other in the longitudinal direction and the gap ⁇ penetrates in the width direction of the shoe sole.
  • a width Wo ( Fig. 13 ) of the gap between the adjacent antislip protrusions 20 can be smaller than that of the shoe sole of the second embodiment. This can densely dispose the antislip protrusions 20 on the shoe sole of the fourth embodiment, thereby exhibiting higher slip resistance.
  • Configurations not particularly specified in the shoe sole of the fourth embodiment may be substantially identical to those of the shoe soles of the first to third embodiments.
  • Fig. 15 illustrates an example of the layout of the antislip protrusions 20 that can obtain the same effect as the shoe sole of the fourth embodiment.
  • Fig. 15 is an enlarged view of a part corresponding to the part A of Fig. 12 .
  • the positions of the antislip protrusions 20 constituting the protrusion rows L adjacent to each other in the longitudinal direction are displaced from each other by a half pitch in the width direction (x-axis direction) of the shoe sole.
  • the effect can be obtained also by the shoe sole including the antislip protrusions 20 arranged as illustrated in Fig. 15 .
  • Fig. 16 is a side view illustrating an example of a shoe including the shoe sole according to the fifth embodiment.
  • Fig. 16 is a perspective view illustrating the peripheral part of the shoe sole of the shoe.
  • the configurations and layout of antislip protrusions 20 are substantially identical to those of the shoe sole of the fourth embodiment.
  • a soft midsole part 32 is provided on the top surface of a shoe sole body 10 (outsole part) as illustrated in Fig. 16 .
  • the hardness of the soft midsole part 32 is lower than that of the shoe sole body 10 (outsole part). This can easily exhibit a feature properly on the actual shoe so as to continuously perform bracing from a moment immediately after the start of bracing.
  • the molding materials and hardness of the soft midsole part 32 are the same as those of the midsole part discussed in "1.
  • a shoe sole according to a first embodiment are the same as those of the midsole part discussed in "1.
  • the antislip protrusions 20 on a toe part and the antislip protrusions 20 on a heel part are provided on the common shoe sole body 10 (outsole), whereas on the shoe sole of the fifth embodiment, as illustrated in Fig. 16 , the antislip protrusions 20 on the toe part and the antislip protrusions 20 on the heel part are provided on the separate shoe sole bodies 10 (outsoles).
  • the soft midsole parts 32 are separately provided on the toe part and the heel part, respectively.
  • the shoe sole body 10 (outsole part) and the soft midsole part 32 on the toe part and the shoe sole body 10 (outsole part) and the soft midsole part 32 on the heel part are fixed to a common midsole body 31.
  • Configurations not particularly specified in the shoe sole of the fifth embodiment may be substantially identical to those of the shoe soles of the first to fourth embodiments.
  • Fig. 17 is a bottom view illustrating a state of a shoe sole viewed from the bottom according to the sixth embodiment.
  • Fig. 18 is a side view illustrating a shoe including the shoe sole according to the sixth embodiment.
  • Fig. 18 is a perspective view illustrating the peripheral part of the shoe sole of the shoe.
  • the configurations of antislip protrusions 20 are substantially identical to those of the shoe soles of the second, fourth, and fifth embodiments. Moreover, as illustrated in Fig. 17 , the shoe sole of the sixth embodiment is substantially identical to the shoe sole of the first embodiment in that the antislip protrusions 20 are provided substantially over the bottom of the shoe sole. Additionally, the shoe sole of the sixth embodiment is substantially identical to the shoe sole of the fourth embodiment in that the antislip protrusions 20 are arranged in a lattice pattern in the width direction and the longitudinal direction of the shoe sole.
  • the shoe sole of the sixth embodiment is identical to the shoe sole of the fifth embodiment in that a soft midsole part 32 is provided on the top surface of a shoe sole body 10 (outsole part).
  • the shoe sole bodies 10 (outsole parts) and the soft midsole parts 32 are separately provided on the toe part and the heel part as illustrated in Fig. 16
  • the shoe sole body 10 (outsole part) and the soft midsole part 32 are shared by the toe part and the heel part.
  • Configurations not particularly specified in the shoe sole of the sixth embodiment may be substantially identical to those of the shoe soles of the first to fifth embodiments.
  • the shoe sole was fabricated according to example 1 belonging to the technical scope of the shoe sole of the present disclosure, and an experiment was conducted to measure a maximum static friction coefficient and a dynamic friction coefficient on an ice surface. Furthermore, for evaluation of the slip resistance of example 1, the same measurement was conducted on a shoe sole fabricated with highest slip resistance on an ice surface by another manufacturer (hereinafter will be referred to as "shoe sole of comparative example 1") among shoe soles currently on the market. The method of measuring the maximum static friction coefficient and the dynamic friction coefficient was performed in the foregoing steps 1 to 6. Although the shoe sole is placed on a solid ice surface in step 1, measurements were conducted on the shoe sole on a wet surface in order to evaluate slip resistance under more slippery conditions, as well as on the shoe sole on a solid ice surface.
  • the shoe sole of example 1 corresponds to the shoe sole of the first embodiment and has the cylindrical antislip protrusions 20.
  • the width Wo ( Fig. 2 ) of the gap between the adjacent antislip protrusions 20 is 1.8 mm and the number of antislip protrusions 20 per unit area is about 1.2/cm 2 .
  • the outside diameter Do ( Fig. 3(a) ) of the antislip protrusion 20 is 8 mm
  • the height Ho ( Fig. 3(a) ) of the antislip protrusion 20 is 4 mm
  • the ratio Ho/Do of the height H 0 to the outside diameter D 0 of the antislip protrusion 20 is 0.5.
  • the number of steps 22 is three, the width W 1 ( Fig. 3(b) ) of each of the steps 22 is 0.5 mm, and the height H 1 ( Fig. 3(b) ) of each of the steps 22 is 0.3 mm.
  • the ratio H 1 /W 1 of the height H 1 to the width W 1 of the step 22 is 0.6.
  • the diameter D 1 ( Fig. 3(a) ) of the drain hole 23 is 3 mm.
  • the hardness of rubber used for the shoe sole (outsole part) ranges from 35 to 50.
  • Fig. 8 is a graph indicating measurement results on a change of the friction coefficient of the shoe sole of example 1 on the solid ice surface.
  • Fig. 9 is a graph indicating measurement results on a change of the friction coefficient of the shoe sole of comparative example 1 on the solid ice surface.
  • a time on the horizontal axis indicates a time from the start of application of the force F 2 in the horizontal direction in step 3.
  • the horizontal axes of graphs in Figs. 10 and 11 which will be discussed later, have the same meanings as those of Figs. 8 and 9 .
  • the dynamic friction coefficient ⁇ 1 of the shoe sole of comparative example 1 is lower than the maximum static friction coefficient ⁇ 0 and the ratio ⁇ 1 / ⁇ 0 of the dynamic friction coefficient ⁇ 1 to the maximum static friction coefficient ⁇ 0 is about 0.77.
  • the shoe sole of comparative example 1 exhibits excellent slip resistance immediately after the start of bracing on the ice surface but tends to slip thereafter.
  • the shoe soles firmly gripped the ice surface immediately after the start of bracing (immediately after landing on a walking surface or immediately after kicking the walking surface) but the shoe soles were likely to slip thereafter.
  • the dynamic friction coefficient ⁇ 1 of the shoe sole of example 1 is higher than the maximum static friction coefficient ⁇ 0 and the ratio ⁇ 1 / ⁇ 0 of the dynamic friction coefficient ⁇ 1 to the maximum static friction coefficient ⁇ 0 is about 1.34.
  • the dynamic friction coefficient ⁇ 1 of the shoe sole of example 1 is 0.39, which is considerably higher than 0.30, the dynamic friction coefficient ⁇ 1 of the shoe sole of comparative example 1.
  • the shoe sole of example 1 enables continuous bracing from a moment immediately after the start of bracing. Actually, during walking in shoes with the shoe soles of example 1 on an ice surface, firm gripping was felt from landing to separation of the shoe sole on the ice surface.
  • shoes having the shoe soles of example 1 enabled walking with the same feeling as walking on a dry road without the need for extra caution.
  • Shoes having the shoe soles of example 1 enabled running on an ice surface and side steps on an ice surface.
  • Fig. 10 is a graph indicating measurement results on a change of the friction coefficient of the shoe sole of example 1 on a melting ice surface.
  • Fig. 11 is a graph indicating measurement results on a change of the friction coefficient of the shoe sole of comparative example 1 on the melting ice surface.
  • the dynamic friction coefficient ⁇ 1 of the shoe sole of example 1 is lower than the maximum static friction coefficient ⁇ 0 and the ratio ⁇ 1 / ⁇ 0 of the dynamic friction coefficient ⁇ 1 to the maximum static friction coefficient ⁇ 0 is about 0.64, which is considerably higher than 0.24, the ratio ⁇ 1 / ⁇ 0 of the shoe sole of comparative example 1 under the same conditions.
  • the dynamic friction coefficient ⁇ 1 of the shoe sole of example 1 is 0.20, which is twice the dynamic friction coefficient ⁇ 1 of the shoe sole of comparative example 1 under the same conditions, even on a melting ice surface.
  • the shoe sole of example 1 has higher slip resistance than the shoe sole having the shoe sole of comparative example 1 in which the highest slip resistance on an ice surface is evaluated among shoe soles currently on the market.

Landscapes

  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Claims (5)

  1. Schuhsohle mit einer Vielzahl von nach unten ausgebildeten Antirutsch-Vorsprüngen (20), wobei die Unterseiten der Antirutsch-Vorsprünge (20) so konfiguriert sind, dass sie in Kontakt mit einem Boden kommen, wobei:
    die Antirutsch-Vorsprünge (20) jeweils in einer säulenartigen Form mit einer Lücke zwischen benachbarten Antirutsch-Vorsprüngen (20) ausgebildet sind;
    die Antirutsch-Vorsprünge (20) jeweils einen trichterförmigen vertieften Abschnitt (21) aufweisen, der an der Unterseite des Antirutsch-Vorsprungs (20) ausgebildet ist, dadurch gekennzeichnet, dass
    die Antirutsch-Vorsprünge (20) einstückig mit dem Schuhsohlenkörper (10) geformt sind,
    jeder vertiefte Abschnitt (21) an einer inneren Oberfläche des vertieften Abschnitts (21) ringförmig ausgebildete Stufen (22) aufweist, und
    die Schuhsohle einen dynamischen Reibungskoeffizienten auf einer Eisoberfläche hat, der höher ist als ein maximaler statischer Reibungskoeffizient auf der Eisoberfläche.
  2. Schuhsohle nach Anspruch 1, die ferner eine Vielzahl von Vorsprungsreihen aufweist, die in vorbestimmten Intervallen in einer Längsrichtung der Schuhsohle angeordnet sind, wobei die Vorsprungsreihe die Antirutsch-Vorsprünge (20) aufweist, die entlang einer Breitenrichtung der Schuhsohle angeordnet sind, während sie in vorbestimmten Intervallen in der Breitenrichtung der Schuhsohle beabstandet sind.
  3. Schuhsohle nach Anspruch 1 oder 2, die ferner Ablauflöcher (23) zum Saugen von Wasser in die vertieften Abschnitte (21) und Abführen des Wassers in die Umgebung der Schuhsohle, wenn die Unterseiten der Antirutsch-Vorsprünge (20) in Kontakt mit dem Boden kommen, aufweist.
  4. Schuhsohle nach einem der Ansprüche 1 bis 3, die ferner einen Zwischensohlenteil auf einer Oberseite der Schuhsohle aufweist, wobei der Zwischensohlenteil aus einem Material mit geringerer Härte als ein Schuhsohlenkörper (10) hergestellt ist.
  5. Schuh, der die Schuhsohle nach einem der Ansprüche 1 bis 4 aufweist.
EP16886431.2A 2016-01-22 2016-11-04 Schuhsohle und schuh Active EP3406156B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016010220 2016-01-22
PCT/JP2016/082768 WO2017126192A1 (ja) 2016-01-22 2016-11-04 靴底及び靴並びに滑り止め部材

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EP3406156A1 EP3406156A1 (de) 2018-11-28
EP3406156A4 EP3406156A4 (de) 2019-08-14
EP3406156B1 true EP3406156B1 (de) 2021-06-09

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JP (1) JP6881759B2 (de)
KR (1) KR102555764B1 (de)
CN (1) CN108471837B (de)
WO (1) WO2017126192A1 (de)

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KR102422086B1 (ko) * 2018-04-10 2022-07-15 닛신 고무 가부시키가이샤 신발 밑창 및 신발
JP2021177020A (ja) * 2020-05-06 2021-11-11 トップ・グローブ・インターナショナル・スンディリアン・ブルハド 薄膜物品のエンボスメント

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JPS5710083B2 (de) * 1972-04-25 1982-02-24
DE2533622A1 (de) * 1975-07-26 1977-02-10 Adolf Dassler Sportschuh, insbesondere tennisschuh
SU1639600A1 (ru) * 1988-08-10 1991-04-07 Р.В.Кудр вцев Подошва со средством противоскольжени
JP2598748B2 (ja) * 1993-12-18 1997-04-09 株式会社アサヒコーポレーション 低温防滑性の靴底
JP3096646U (ja) * 2003-02-26 2003-09-26 堂模 潘 靴の滑り防止構造
US20050034798A1 (en) * 2003-08-14 2005-02-17 Bright Donald Anthony Tread and method for use
KR20060003740A (ko) 2004-07-07 2006-01-11 주식회사 케이티앤지 자기공명영상 장치를 이용한 건삼의 품질 검사 방법
JP4864349B2 (ja) * 2005-05-30 2012-02-01 株式会社ハイドロストッパー 氷結路面用耐滑材及びそれを用いた履物底
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Publication number Publication date
CN108471837B (zh) 2021-08-24
KR20180107108A (ko) 2018-10-01
JP6881759B2 (ja) 2021-06-02
EP3406156A1 (de) 2018-11-28
JPWO2017126192A1 (ja) 2019-01-31
KR102555764B1 (ko) 2023-07-13
WO2017126192A1 (ja) 2017-07-27
EP3406156A4 (de) 2019-08-14
CN108471837A (zh) 2018-08-31

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