WO2011125959A1 - Structure de semelle destinée à une chaussure - Google Patents

Structure de semelle destinée à une chaussure Download PDF

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Publication number
WO2011125959A1
WO2011125959A1 PCT/JP2011/058479 JP2011058479W WO2011125959A1 WO 2011125959 A1 WO2011125959 A1 WO 2011125959A1 JP 2011058479 W JP2011058479 W JP 2011058479W WO 2011125959 A1 WO2011125959 A1 WO 2011125959A1
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WO
WIPO (PCT)
Prior art keywords
sole
bending
groove
bent
restricting member
Prior art date
Application number
PCT/JP2011/058479
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English (en)
Japanese (ja)
Inventor
一憲 井内
夏樹 佐藤
豪 竹下
Original Assignee
美津濃株式会社
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 美津濃株式会社 filed Critical 美津濃株式会社
Priority to BR112012020621-4A priority Critical patent/BR112012020621A2/pt
Priority to EP11765859A priority patent/EP2554070A1/fr
Priority to AU2011236925A priority patent/AU2011236925A1/en
Priority to JP2012509641A priority patent/JP5392954B2/ja
Priority to CN201180016795XA priority patent/CN102821633A/zh
Priority to CA2787326A priority patent/CA2787326A1/fr
Publication of WO2011125959A1 publication Critical patent/WO2011125959A1/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
    • A43B13/141—Soles; Sole-and-heel integral units characterised by the constructive form with a part of the sole being flexible, e.g. permitting articulation or torsion
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
    • A43B13/12—Soles with several layers of different materials

Definitions

  • the present invention relates to a sole structure for shoes, and more particularly, to an improvement in structure for reducing energy loss during running.
  • the present applicant has proposed a sole structure as shown, for example, in International Publication No. 2006/070549, in order to improve the flexibility of the forefoot portion of the sole of the shoe.
  • the sole structure includes an upper plate disposed above the forefoot region of the sole structure and extending in the front-rear direction along the forefoot region, with a certain gap between the upper plate and the upper plate.
  • a lower plate having a concavo-convex shape extending in the front-rear direction along the forefoot region and having a path length in the front-rear direction that is longer than a path length in the front-rear direction of the upper plate.
  • the lower plate has an uneven shape so that the path length in the front-rear direction of the lower plate is longer than the path length in the front-rear direction of the upper plate.
  • the lower plate can extend in the front-rear direction.
  • the present applicant has proposed a sole structure as shown in, for example, Japanese Patent Application Laid-Open No. 2005-13718 in order to smoothly kick out the forefoot portion of the sole of the shoe.
  • This sole structure has a flat-shaped gap extending in the front-rear direction in the sole forefoot region, and the gap is formed of the first and second curved surfaces, and the first and second curved surfaces are formed.
  • the distance between the front and rear ends is substantially equal.
  • FIG. 12 schematically shows how a shoe wearer is running, and shows the kicking out phase during running.
  • (a) shows a foot flat state in which the sole is entirely grounded. At this time, the entire sole including the sole forefoot is grounded.
  • (B) shows the state of the heel-off in which the heel portion of the sole begins to take off, and the state in which the sole forefoot portion begins to bend.
  • (C) has shown the state which the bending
  • E shows a state in which the sole forefoot portion is bent to the maximum, in other words, an aspect in which the kicking operation by the sole forefoot portion is about to be started.
  • FIG. 13 is a model of a runner's leg, in which MP indicates an MP joint.
  • FIG. 14 is a graph showing the torque around the MP joint (MP joint torque) that changes every moment during the kicking out phase shown in FIG. 12, and FIG. It is a graph of the temporal change in angular velocity at the time.
  • FIG. 16 is a graph showing the temporal change of power calculated by the MP joint during the kicking out phase based on the MP joint torque and angular velocity. As shown in FIG.
  • the toe-off is from the state where the power becomes zero, that is, the state where the MP joint torque becomes zero (see FIG. 14) until the toe completely leaves.
  • the energy exhibited by the MP joint is negative and energy loss occurs (see the shaded area in FIG. 16).
  • FIG. 17 represents the temporal change in power exerted by the MP joint during the kicking out phase of each shoe, and (b) to (b) in the upper schematic diagram in FIG. f) corresponds to (b) to (f) in FIG. 12, respectively.
  • the upper schematic diagram corresponds to the lower graph and the upper and lower sides.
  • the negative ( ⁇ 0) portion on the vertical axis indicates the occurrence of energy loss, and the greater the graph swings downward from 0 on the vertical axis, the greater the energy loss that is generated. Is shown. As can be seen from FIG.
  • the sole structure for a shoe according to the invention of claim 1 is formed in an opening on the bottom surface of the sole, and is laid between a groove extending in the sole width direction and each opening edge portion of the groove in the front-rear direction of the sole.
  • the bending of the sole is allowed until it is gradually extended from the bent state and stretched linearly between the opening edges.
  • a bending regulating member that acts to regulate the bending of the sole by receiving a force in the extending direction from a state of being stretched linearly between the opening edges.
  • the bending restricting member constructed in a bent state between the opening edges in the front-rear direction of the groove formed in the lower surface of the sole is gradually changed from the bent state at the initial stage of bending of the sole.
  • the bending resistance of the sole becomes relatively small because it acts to allow the sole to bend until it is stretched in a straight line between the opening edges.
  • the sole can be bent smoothly, thereby reducing the energy loss in the first half of the kicking out phase.
  • the bending regulating member acts to regulate the bending of the sole by receiving a force in the extending direction from the state of being stretched linearly between the opening edges at the stage where the bending of the sole has advanced.
  • the sole structure shown in the above publication is similar to the sole structure according to the invention of claim 1 of the present application.
  • the sole structure in the above publication is provided in the arch portion, and the arch portion is below.
  • the reinforcing plate described in the above publication is not assumed to be deformed so as to receive a force in the extending direction from a state of being stretched in a straight line, and functions as a bending restricting member in the invention of claim 1 of the present application.
  • the groove is provided in the forefoot portion of the sole.
  • the bending restricting member is bent upward by having an upper bent portion bent upward in the groove, and the cross-sectional shape of the bending restricting member in the front-rear direction of the sole is inverted V. It is letter-shaped or inverted U-shaped.
  • the bending restricting member is bent by deforming so that the bending height of the upper bending portion gradually decreases (that is, the upper bending portion gradually becomes flat). It gradually expands from the state that was.
  • the bending restricting member is not fixed to the wall surface of the groove.
  • the bending restricting member when the sole is bent, the bending restricting member can be deformed independently from the groove without being directly affected by the deformation of the groove.
  • the bending restricting member in the third aspect, is separated from the wall surface of the groove. In this case, when the sole is bent, the bending restricting member becomes less susceptible to the influence of the deformation of the groove, and can be deformed more independently from the groove. In this case, the bottom of the groove, which is the sole bending point when the sole is bent, can be disposed at a position away from the bending restricting member.
  • the neutral axis of bending when the sole is bent When the sole is bent, it is possible to increase the amount of deformation of the span between the opening edges of the groove in which the bending restricting member is installed, thereby restricting the bending restricting member with respect to the bending of the sole.
  • the amount can be easily increased, and the regulation amount can be easily adjusted.
  • the invention according to claim 6 is the invention according to claim 1, wherein the bending restricting member is bent downward by having a downward bending portion bent downward in the groove, and the cross-sectional shape of the bending restricting member in the longitudinal direction of the sole is V-shaped. Or U-shaped.
  • the bending regulating member is bent by deforming so that the bending height of the lower bending portion gradually decreases (that is, the lower bending portion gradually becomes flat). It gradually expands from the state that was.
  • the bending restricting member is a tape-shaped member (that is, a belt-shaped member). In this case, when the bending restricting member is flexible, the bending restricting member can be easily installed while being bent between the opening edges in the front-rear direction of the groove.
  • the bending restricting member is bent sideways by having a side bent portion bent sideways in the groove.
  • the bending regulating member is gradually extended from the bent state by being deformed so that the amount of bending of the side bent portion to the side is gradually reduced.
  • the invention according to claim 9 is the member according to claim 8, wherein the bending restricting member is a member extending linearly (for example, a thread or a wire).
  • the bending restricting member is a member extending linearly (for example, a thread or a wire).
  • the tensile elastic modulus and bending elastic modulus of the bending restricting member can be changed. Can be adjusted easily.
  • the bending restricting member is made of a fabric.
  • the bending restricting member since the bending restricting member is made of a material having poor stretchability, the bending restricting member extends from a state in which the bending restricting member is stretched linearly between the opening edges of the groove when the sole is bent.
  • the bending restricting member When receiving a force in the direction, the bending restricting member effectively acts to restrict the bending of the sole. Thereby, the bending resistance of the sole can be effectively increased in the second half of the kicking out phase during running. Further, in this case, since the bending restriction member made of fabric has a very small bending resistance and can be deformed, if the bent state is kept bent, little force is required to change the bent state. Therefore, the cloth-made bending regulating member does not become a bending resistance of the sole at the initial stage of bending of the sole, and can promote free bending of the sole.
  • the bending restricting member is a sheet-like member that covers the ground contact surface of the sole, and a plurality of outsole chips are fixed to the surface of the sheet-like member on the ground contact surface side.
  • the sheet-like bending restricting member is used as a base material for a plurality of outsole chips (outsole pieces) separately disposed, the bending restricting member and the plurality of outsole chips are integrally formed. A single unit can be obtained, whereby the assembly process of the sole structure can be simplified and the weight can be reduced.
  • the bending restricting member is provided on the inner or outer side of the sole.
  • the bending restricting member is provided on the inner side of the sole, it is possible to realize a shoe suitable for a runner who tends to pronation during running. That is, in this case, in the second half of the kicking phase during running, the bending resistance on the inner shell side of the sole is relatively increased and the bending of the inner shell side of the sole is restricted. Energy loss in the second half can be reduced. Further, when the bending restricting member is provided on the outer side of the sole, it is possible to realize a shoe suitable for a runner having a tendency to swell during running.
  • the bending restricting members are provided on the inner shell side and the outer shell side of the sole. In this case, it is possible to realize a shoe that can cope with a runner who tends to have either pronation or pronation during running.
  • the bending resistance of the sole is changed between the inner side and the outer side of the sole by making the tensile elastic modulus and bending elastic modulus of each bending regulating member different between the inner side and the outer side of the sole. Fine adjustment is possible.
  • an elastic cover member that extends in the longitudinal direction of the sole along the bent shape of the bending restricting member and covers the bending restricting member from below is disposed between the respective opening edges of the groove. It is installed. In this case, by providing the elastic cover member, it is possible to prevent the bending restricting member from being exposed to the grounding surface, and the durability of the bending restricting member can be improved.
  • the elastic cover member since the elastic cover member has elasticity in the front-rear direction, the elastic cover member does not hinder the bending of the sole.
  • the outsole member having a grounding surface is disposed on the bottom surface of the sole, and the elastic cover member is constituted by the outsole member.
  • the sole structure includes an upper plate disposed above and extending in the longitudinal direction of the sole, and a midsole made of a soft elastic member disposed below the upper plate.
  • a groove is formed in the lower surface of the midsole.
  • a pressing load acting downward from the wearer's foot when the sole is grounded can be supported by the upper plate.
  • the upper plate is disposed above the bottom of the groove, so that it is possible to prevent the bottom of the groove from being deformed by the action of a pressing load from the foot and to keep the neutral axis of bending when the sole is bent upward. be able to.
  • the sole is bent, the amount of deformation of the span between the opening edges of the groove in which the bending restricting member is installed can be increased, thereby easily increasing the amount of restriction of the bending restricting member with respect to the bending of the sole. This makes it easy to adjust the amount of regulation.
  • the midsole since the midsole is disposed below the upper plate, the midsole can prevent the upper plate from being lowered when the pressing load is applied, and this prevents bending during bending of the sole.
  • the vertical axis can be kept upward.
  • the invention according to claim 17 is the invention according to claim 16, wherein the sole structure further includes a lower plate disposed below the midsole and extending in the front-rear direction of the sole. It is configured by extending to the edge. In this case, since it is not necessary to provide the bending restricting member separately from the lower plate, the number of parts can be reduced and the configuration can be simplified.
  • the sole structure of a shoe according to the invention of claim 18 is disposed above and extends in the front-rear direction of the sole, and is disposed below the plate, is fixed to the lower surface of the plate, opens downward, and has a sole width.
  • a bending restricting member that acts to restrict the bending of the sole by receiving a force in the extending direction from the state of being stretched.
  • the bending restricting member erected between the opening edges in the front-rear direction of the groove formed in the lower surface of the midsole is bent at the initial stage of bending of the sole. Since it acts to allow bending of the sole until it gradually extends from the state and is stretched linearly between the opening edges, the bending resistance of the sole is relatively low in the first half of the kicking out phase during running. Thus, the sole is bent smoothly, and energy loss in the first half of the kicking out phase can be reduced.
  • the bending regulating member acts to regulate the bending of the sole by receiving a force in the extending direction from the state of being stretched linearly between the opening edges at the stage where the bending of the sole has advanced. Therefore, in the second half of the kicking phase during running, the bending resistance of the sole becomes relatively large and the bending of the sole is restricted, thereby reducing energy loss in the second half of the kicking phase.
  • an energy loss during running can be reduced, and as a result, a sole structure that can obtain a smooth ride feeling during running can be realized.
  • the pressing load acting downward from the wearer's foot when the sole is grounded can be supported by the plate.
  • the bottom of the groove can be prevented from being deformed by the action of a pressing load from the foot, and the neutral axis of bending during bending of the sole can be kept upward. Can do.
  • the amount of deformation of the span between the opening edges of the groove in which the bending restricting member is installed can be increased, thereby easily increasing the amount of restriction of the bending restricting member with respect to the bending of the sole. This makes it easy to adjust the amount of regulation.
  • the midsole since the midsole is disposed below the plate, the midsole can prevent the plate from being lowered when the pressing load is applied, thereby preventing the neutral axis of bending when the sole is bent.
  • each opening edge The length L along the bent shape of the bending regulating member between the parts is S + D ⁇ sin 15 ° ⁇ L ⁇ S + H ⁇ sin 15 Is satisfied.
  • the reason why the length L of the bending restricting member is defined in this way will be described with reference to FIG. FIG. 4 schematically shows a structure in which the bending restricting member Br is bent between the opening edges of the groove G formed in the midsole M. It is assumed that the midsole M is bent by 15 ° from this state.
  • the midsole M bends around the bottom Ga with the bottom Ga of the groove G as a bending point, thereby increasing the central angle around the bottom Ga of the groove G by 15 °.
  • the midsole M bends around the point Ha with the highest point Ha on the midsole located above the bottom Ga as a bending point, thereby increasing the central angle around the point Ha by 15 °.
  • the actual bending point is located between the bottom Ga and the point Ha. This is also true when the midsole M is equipped with a plate. When the plate is attached to the midsole M, the neutral axis when the sole is bent tends to be arranged in the vicinity of the plate.
  • the midsole M is bent around the point Ha, and the central angle around the point Ha is increased by 15 °, so that the bending restricting member Br is straight from the bent state between the opening edges of the groove G.
  • the graph of FIG. 5 is a graph obtained by calculating the temporal changes in the force of the runner kicking the ground back and the bending angle of the sole by performing an actual running test (biomechanics experiment). .
  • the upper graph in FIG. 5 shows time [ms] on the horizontal axis and the force Fy [N] on which the runner kicks the ground back, and the toe-off in which the toes move away from the ground after the heel touches the ground.
  • the time change of the force Fy that the runner kicks the ground back by the moment of (toe off) is shown, and the lower graph shows the time of the bending angle [°] of the sole at that time. It represents a change.
  • Each graph corresponds to the top and bottom. From the graph of FIG. 5, it can be seen that the bending angle of the sole is 15 ° when the force Fy by which the runner kicks the ground back is the maximum (Fy_max). The calculation of the bending angle is obtained from the increase in the bending angle from a so-called foot flat state (that is, a state where the sole is entirely in contact with the ground) where the bending angle is 0 °. On the other hand, from the graph of FIG.
  • the lower the sole bending resistance the smaller the energy loss. It is known that the energy loss is smaller as the bending resistance of the sole is larger before and after the phase (e) where the portion is bent at the maximum. From the above, regarding the bending of the sole, it is ideal that the sole bends until a posture (that is, the bending angle) that allows the ground to be kicked back with the maximum force (Fy_max), and thereafter the sole does not bend. To be judged. Therefore, in the above inequality, 15 ° is adopted as the bending angle of the sole.
  • the bending restricting member when the bending angle of the sole is less than 15 °, the bending restricting member is bent between the opening edges of the groove, and when the bending angle becomes 15 °, the bending restricting member is linear. When it is in a stretched state and the bending angle exceeds 15 °, the bending regulating member receives a force in the extending direction from the state in which the bending regulating member is stretched in a straight line.
  • the bending restricting member is made of a material having a Young's modulus of 400 MPa or more when the strain is 10% or less.
  • FIG. 6 shows four types of bending restricting members made of materials having different Young's moduli, and the same runner actually wears four types of shoes in which these members are incorporated, and each shoe at that time runs. The result of having calculated the energy loss resulting from the torque around MP joint is shown.
  • the conditions of the test performed when calculating the Young's modulus of four types of prepared materials solid rubber, PEBAX (trade name), polyester tape, nylon tape) are as follows.
  • Test method Tensile test described in JIS K 7113 (standard for “Plastic tensile test method”)
  • Shape of test piece Shape defined in JIS K 7113
  • Tensile speed 500 mm / min.
  • Holding distance of the test piece 50 mm v
  • Tensile conditions Strain of 10% or less
  • the energy loss decreases significantly when the Young's modulus is 400 [Mpa] or more. It can also be seen that when the Young's modulus exceeds 400 [Mpa], the magnitude of the energy loss hardly changes.
  • the Young's modulus value of the material constituting the bending restricting member is defined as 400 MPa or more when the strain is 10% or less.
  • the material that satisfies such conditions is a tape made of polyester or nylon.
  • the bending restricting member allows bending of the sole until the bending angle of the sole is up to 15 °, and causes bending of the sole when the bending angle of the sole exceeds 15 °. Acts to regulate.
  • the bending regulating member that connects the opening edge portions between the opening edge portions of the groove in the sole width direction formed in the bottom surface of the sole is bent.
  • the bending restriction member is gradually extended from the bent state, and the sole is bent until it is stretched linearly between the opening edges.
  • the bending regulating member acts to regulate the bending of the sole by receiving a force in the extending direction from a state of being stretched linearly between the opening edges at the stage where the bending of the sole has advanced,
  • the bending resistance of the sole becomes relatively large, and the bending of the sole is restricted, thereby reducing the energy loss in the second half of the kicking out phase.
  • an energy loss during running can be reduced, and as a result, a sole structure that can obtain a smooth ride feeling during running can be realized.
  • the energy loss during running can be reduced by the action of the bending regulating member, and a smooth ride feeling can be obtained during running.
  • the plate can support the pressing load acting downward from the wearer's foot when the sole touches the ground, and the plate is placed above the bottom of the groove, so that the pressing load from the foot The bottom of the groove can be prevented from being deformed, and the neutral axis of bending during bending of the sole can be maintained upward. As a result, when the sole is bent, the amount of deformation of the span between the opening edges of the groove in which the bending restriction member is installed can be increased.
  • the amount of restriction of the bending restriction member with respect to the bending of the sole can be easily increased. This makes it easy to adjust the amount of regulation.
  • the midsole is located below the plate, so that the plate can be prevented from falling down when the pressing load is applied, so that the neutral axis of bending when the sole is bent can be kept upward. Can do.
  • FIG. 1A is a bottom view of a sole structure for shoes according to a first embodiment of the present invention.
  • FIG. 1B is a side view of the inner side of the sole structure of FIG. 1A.
  • FIG. 2 is a sectional view taken along line II-II in FIG. 1A.
  • FIG. 3 is a sectional view taken along line III-III in FIG. 1A.
  • FIG. 4 is a diagram schematically showing FIG.
  • FIG. 5 is a graph showing temporal changes in the force of a running runner kicking the ground back and the sole bending angle.
  • FIG. 6 is a graph showing the relationship between energy loss and Young's modulus due to bending restricting members having different Young's moduli.
  • FIG. 1B is a side view of the inner side of the sole structure of FIG. 1A.
  • FIG. 2 is a sectional view taken along line II-II in FIG. 1A.
  • FIG. 3 is a sectional view taken along line III-III in FIG. 1A
  • FIG. 7A is a schematic view for explaining the operation at the time of bending of the sole structure according to the first embodiment in time series.
  • FIG. 7B is a schematic view for explaining the operation at the time of bending of the sole structure according to the first embodiment in time series.
  • FIG. 7C is a schematic view for time-sequentially explaining the operation at the time of bending of the sole structure according to the first embodiment.
  • FIG. 8 is an enlarged cross-sectional view of the bending restricting member portion of the shoe sole structure according to the third embodiment of the present invention, and corresponds to FIG. 3 of the first embodiment.
  • FIG. 9 is a partial bottom view of a shoe sole structure according to a fifth embodiment of the present invention.
  • FIG. 10 is a sectional view taken along line XX of FIG. FIG.
  • FIG. 11 is a partial bottom view of a sole structure for shoes according to a sixth embodiment of the present invention.
  • FIG. 12 is a diagram schematically showing a state where a shoe wearer (runner) is running.
  • FIG. 13 is a diagram showing a model of a runner's leg.
  • FIG. 14 is a graph showing the torque around the MP joint (MP joint torque) that changes every moment during the kicking phase shown in FIG.
  • FIG. 15 is a graph showing the temporal change in angular velocity in the kicking out phase shown in FIG.
  • FIG. 16 is a graph showing the temporal change of power calculated by the MP joint in the kicking out phase based on the MP joint torque shown in FIG. 14 and the angular velocity shown in FIG.
  • the sole structure 1 includes an upper mid made of a soft elastic member extending in the front-rear direction from the heel part H of the shoe to the middle foot part M to the front foot part F.
  • the upper midsole 2 includes a sole contact portion 20 with which a shoe wearer's foot contacts, and a winding portion 21 that rises obliquely upward from the left and right side edges of the sole contact portion 20. And have.
  • the upper plate 3 has a support portion 30 that supports the sole contact portion 20 of the upper midsole 2 and a winding portion 31 that rises obliquely upward from the left and right side edges of the support portion 30.
  • the lower midsole 4 has grooves 40, 41 extending substantially in the shoe width direction at the bottom of the front foot F. Both of these grooves 40 and 41 are for facilitating bending of the sole forefoot region.
  • the groove 40 is disposed on the front side of the forefoot part F, and the groove 41 is on the rear side thereof, preferably on the wearer's foot. It is arranged slightly behind the thumb ball part.
  • a vent hole 4a penetrating the lower midsole 4 in the vertical direction is formed in the groove 41.
  • the vent hole 4a communicates with a vent hole (not shown) that similarly penetrates the upper midsole 2 and the upper plate 3 in the vertical direction.
  • the lower plate 5 has a wave shape that advances in the front-rear direction, and has a bulging portion 50 that bulges upward in a convex shape in the heel portion H and the middle foot portion M.
  • a broken line L indicates a ridge line of the bulging portion 50.
  • each bulging portion 50 is connected to the upper plate 3 via the elastic block member 6. As a result, a gap C is formed between the upper and lower plates 3 and 5.
  • An outsole plate 7 that is in contact with the road surface is fixed to each lower surface of the lower midsole 4 and the lower plate 5.
  • the upper midsole 2 and the lower midsole 4 are, for example, a thermoplastic synthetic resin such as ethylene-vinyl acetate copolymer (EVA) or a foam thereof, a thermosetting resin such as polyurethane (PU), or a foam thereof.
  • EVA ethylene-vinyl acetate copolymer
  • PU polyurethane
  • PU polyurethane
  • a rubber material such as butadiene rubber or chloroprene rubber, or a soft elastic member such as a foamed body thereof.
  • the upper plate 3 and the lower plate 5 are rigid elastic members such as thermoplastic materials such as thermoplastic polyurethane (TPU) and polyamide elastomer (PAE), and thermosetting materials such as epoxy resins and unsaturated polyester resins. Also, it may be integrally formed using an ethylene-vinyl acetate copolymer (EVA), rubber or the like.
  • the outsole plate 7 is made of a rubber material, for example.
  • the groove 41 formed in the lower surface of the lower midsole 4 has an inverted V-shaped cross section as shown in FIG. Between the opening edges of the groove 41 in the front-rear direction (left-right direction in FIG. 3 and up-down direction in FIG. 1A) The bending regulating member 10 is installed in a bent state.
  • the bending restricting member 10 has an upper bent portion 10a bent upward in an inverted V shape, and both end portions in the front-rear direction connect the opening edge portions of the groove 41.
  • a tape-shaped member made of nylon that is, nylon tape
  • the bending restricting members 10 are respectively provided on both the inner shell side and the outer shell side of the sole.
  • the length L along the bending shape of the bending restricting member 10 between each opening edge of the groove 41 is S, the distance between each opening edge of the groove is D, the depth of the groove is D, and above the position of the bottom of the groove.
  • the reason why the length L of the bending restricting member is defined in this way will be described with reference to FIG.
  • FIG. 4 schematically shows a structure in which the bending restricting member Br is bent between the opening edges of the groove G formed in the midsole M. It is assumed that the midsole M is bent by 15 ° from this state.
  • the midsole M is bent around the bottom Ga of the groove G, and the groove G is bent 15 ° around the bottom Ga. That is, the midsole M is bent around the bottom Ga with the bottom Ga of the groove G as a bending point, and thereby the central angle around the bottom Ga of the groove G is increased by 15 °.
  • the midsole M bends around the point Ha with the highest point Ha on the midsole located above the bottom Ga as a bending point, thereby increasing the central angle around the point Ha by 15 °.
  • the actual bending point is located between the bottom Ga and the point Ha. This is also true when the midsole M is equipped with a plate.
  • the midsole M is bent around the point Ha, and the central angle around the point Ha is increased by 15 °, so that the bending restricting member Br is straight from the bent state between the opening edges of the groove G.
  • the graph of FIG. 5 is a graph obtained by calculating the temporal changes in the force of the runner kicking the ground back and the bending angle of the sole by performing an actual running test (biomechanics experiment). .
  • the upper graph in FIG. 5 shows time [ms] on the horizontal axis and the force Fy [N] on which the runner kicks the ground back, and the toe-off in which the toes move away from the ground after the heel touches the ground.
  • the time change of the force Fy that the runner kicks the ground back by the moment of (toe off) is shown, and the lower graph shows the time of the bending angle [°] of the sole at that time.
  • Each graph corresponds to the top and bottom. From the graph of FIG. 5, it can be seen that the bending angle of the sole is 15 ° when the force Fy by which the runner kicks the ground back is the maximum (Fy_max). The calculation of the bending angle is obtained from the increase in the bending angle from a so-called foot flat state (that is, a state where the sole is entirely in contact with the ground) where the bending angle is 0 °. On the other hand, from the graph of FIG. 17 described above, in the phases (c) to (d) in which the sole forefoot is bent, the lower the sole bending resistance, the smaller the energy loss.
  • the energy loss is smaller as the bending resistance of the sole is larger before and after the phase (e) where the portion is bent at the maximum. From the above, regarding the bending of the sole, it is ideal that the sole bends until a posture (that is, the bending angle) that allows the ground to be kicked back with the maximum force (Fy_max), and thereafter the sole does not bend. To be judged. Therefore, in the above inequality, 15 ° is adopted as the bending angle of the sole. In this embodiment, when the bending angle of the sole is less than 15 °, the bending restricting member is bent between the opening edges of the groove, and when the bending angle reaches 15 °, the bending restricting member is linear.
  • the bending regulating member 10 is preferably made of a material having a Young's modulus of 400 MPa or more when the strain is 10% or less.
  • the reason why the Young's modulus of the bending restricting member is defined in this way will be described with reference to FIG. Fig. 6 shows four types of bending restricting members made of materials with different Young's moduli, and the same runner actually wears four kinds of shoes each of which incorporate them, and then runs. The result of having calculated the energy loss resulting from the torque around MP joint about each shoe is shown.
  • the conditions of the test performed when calculating the Young's modulus of four types of prepared materials are as follows.
  • Test method Tensile test described in JIS K 7113 (standard for “Plastic tensile test method”)
  • Shape of test piece Shape defined in JIS K 7113
  • Tensile speed 500 mm / min.
  • Holding distance of the test piece 50 mm v
  • Tensile conditions 10% or less of strain
  • Solid rubber ⁇ PEBAX (trade name) ⁇ polyester tape ⁇ nylon tape.
  • the energy loss decreases as the Young's modulus of the material increases. In particular, the energy loss decreases significantly when the Young's modulus is 400 [Mpa] or more. It can also be seen that when the Young's modulus exceeds 400 [Mpa], the magnitude of the energy loss hardly changes.
  • the Young's modulus value of the material constituting the bending restricting member is defined as 400 MPa or more when the strain is 10% or less.
  • the material that satisfies such conditions is a tape made of polyester or nylon.
  • the upper bent portion 10a of the bending restricting member 10 is not fixed to the bottom wall portion of the groove 41 (vertical V-shaped apex portion).
  • the bending restricting member 10 is not fixed to the wall surface of the groove 41 and is separated from the wall surface of the groove 41.
  • an elastic cover member 8 that covers the upper bent portion 10a of the bending restricting member 10 from below is provided below the bending restricting member 10 between the opening edges of the groove 41 in the front-rear direction.
  • the elastic cover member 8 is composed of the outsole plate 7. In this case, since the elastic cover member 8 does not need to be provided separately from the outsole plate 7, the number of parts can be reduced and the configuration can be simplified. it can.
  • the elastic cover member 8 is provided separately from the outsole plate 7 and is made of a rubber material similar to the outsole plate 7.
  • the elastic cover member 8 extends along the bent shape of the bending restricting member 10 between the opening edges of the groove 41 and is attached to the lower surface of the bending restricting member 10. Since the elastic cover member 8 is provided at a position corresponding to the bending restriction member 10, the elastic cover member 8 is also provided on both the inner side and the outer side of the sole, similarly to the bending restriction member 10. Yes.
  • the length of the end portion to which the bending restricting member 10 is sandwiched and fixed by the elastic cover member 8 and the outsole plate 7 with the lower midsole 4 is shown in the schematic diagram of FIG.
  • the member Br corresponds to the length ⁇ of the end portion sandwiched between the midsole M and the cover member P, and ⁇ is preferably ⁇ ⁇ 10 mm. This is to prevent the peeling by securing a sufficient adhesion region of the bending regulating member.
  • FIGS. 7A to 7C schematically show a cross-sectional structure of the above-described sole structure as a model. 7A to 7C, the same reference numerals as those in FIGS. 1A, 1B, 2 and 3 denote the same or corresponding parts.
  • both ends of the bending restricting member 10 extend in the front-rear direction (the left-right direction in FIGS. 7A to 7C).
  • 7A shows a state before bending the sole
  • FIG. 7B shows a state where the sole is bent by 15 degrees
  • FIG. 7C shows a state where the sole is bent by 30 degrees.
  • the span length in the front-rear direction between the opening edges of the groove 41 is 10 mm
  • the bending restricting member 10 installed in a bent state between the opening edges.
  • channel 41 is a bending point (FLEX POINT) at the time of sole bending. From this state, as shown in FIG. 7B, when the sole is bent by 15 degrees, the sole is bent around the point P of the bottom wall portion of the groove 41, and the bending regulating member 10 is bent at the bending height of the upper bent portion 10a. Is gradually lowered (that is, the upper bent portion 10a is gradually flattened), and the bending regulating member 10 is gradually extended from the bent state. As a result, the span length in the front-rear direction between the opening edges of the groove 41 extends to 12.5 mm.
  • This length is the same as the free length of the bending restricting member 10, and at this time, the bending restricting member 10 is stretched linearly between the opening edge portions, but remains in a free length that does not cause elongation. It is. Therefore, at the initial stage of bending of the sole shown in FIGS. 7A to 7B, the bending regulating member 10 is merely extended from the bent state and is stretched linearly between the opening edge portions.
  • the restricting member 10 allows bending of the sole and does not inhibit the bending of the sole. Thereby, in the first half of the kicking out phase during running, the bending resistance of the sole becomes relatively small, and the bending of the sole is performed smoothly, whereby energy loss in the first half of the kicking out phase can be reduced.
  • the bending resistance of the sole becomes relatively large and the bending of the sole is restricted, thereby reducing the energy loss in the second half of the kicking out phase.
  • the bending restricting member 10 is not fixed to the wall surface of the groove 41, the bending restricting member 10 is not directly affected by the deformation of the groove 41 when the sole is bent. It can be deformed independently from the groove 41.
  • the bending restricting member 10 since the bending restricting member 10 is separated from the wall surface of the groove 41, the bending restricting member 10 becomes less susceptible to the deformation of the groove 41 when the sole is bent. It can be transformed more independently.
  • the bottom wall of the groove which is the sole bending point at the time of bending of the sole, can be disposed at a position away from the bending regulating member 10.
  • the vertical axis can be arranged upward, when the sole is bent, the amount of deformation of the span between the opening edges of the groove 41 in which the bending restricting member 10 is installed can be increased.
  • the regulation amount of the member 10 can be easily increased, and the regulation amount can be easily adjusted.
  • a belt-like or tape-like member is adopted as the bending restriction member 10, and when the bending restriction member 10 has flexibility, the bending restriction member 10 is arranged in the front-rear direction of the groove 41. It can be easily installed in a bent state between the respective opening edges. At this time, by changing the width and thickness of the bending restricting member 10, the tensile elastic modulus and bending elastic modulus of the bending restricting member 10 can be changed. The operation can be easily adjusted. In addition, by providing the elastic cover member 8 below the bending restriction member 10, it is possible to prevent the bending restriction member 10 from being exposed to the grounding surface side and to improve the durability of the bending restriction member 10.
  • the elastic cover member 8 since the elastic cover member 8 has elasticity in the front-rear direction, the elastic cover member 8 does not hinder the bending of the sole. Further, in this case, by providing the upper plate 3, it is possible to support the pressing load acting downward from the wearer's foot when the sole is grounded by the upper plate 3. In addition, by arranging the upper plate 3 above the bottom wall portion of the groove 41, it is possible to prevent the bottom portion of the groove 41 from being deformed by the action of a pressing load from the foot, and to bend during bending when the sole is bent. The vertical axis can be kept upward.
  • the amount of deformation of the span between the opening edges of the groove 41 in which the bending restricting member 10 is installed can be increased, thereby reducing the amount of restriction of the bending restricting member 10 against the bending of the sole. It can be easily enlarged and the regulation amount can be easily adjusted.
  • the lower midsole 4 since the lower midsole 4 is disposed below the upper plate 3, the lower midsole 4 can prevent the upper plate 3 from being lowered when the pressing load is applied.
  • the neutral axis of the time bending can be kept upward.
  • the bending restricting member 10 may be configured by extending the lower plate 5. In this case, the bending restricting member 10 does not need to be provided separately from the lower plate 5. Can be simplified.
  • the groove 41 formed in the lower midsole 4 has an inverted V-shaped cross section
  • the cross-sectional shape of the groove 41 may be an inverted U shape, or may be an arc shape (that is, a flat inverted U shape).
  • any shape other than these can be adopted as long as it is a groove shape opening downward.
  • the bending restricting member 10 disposed in the groove 41 bends upward by having an upper bent portion 10a bent upward in the groove 41.
  • the upper bent portion 10 a is not fixed to the bottom wall portion of the groove 41.
  • the bending restricting member 10 is not fixed to the wall surface of the groove 41 and is separated from the wall surface of the groove 41.
  • the cross-sectional shape of the bending restricting member 10 in the front-rear direction of the sole is described as an example of an inverted V shape, but the cross-sectional shape of the bending restricting member 10 may be an inverted U shape, Alternatively, an arc shape (that is, a flat inverted U shape) may be used.
  • Various shapes can be adopted according to the cross-sectional shape of the groove 41 of the lower midsole 4.
  • the elastic cover member 8 ′ that covers the lower bent portion 10′a of the bending restricting member 10 ′ from below also has a bent shape that follows the bent shape of the bent restricting member 10 ′.
  • the same reference numerals as those in the previous embodiment denote the same or corresponding parts.
  • the bending height of the lower bent portion 10′a is gradually lowered (that is, the lower bent portion 10′a is gradually flattened).
  • the bending restricting member 10 ′ is gradually extended from the bent state.
  • a nylon tape has been described as an example of the bending restricting member 10, but the application of the present invention is not limited to this.
  • a tape made of a resin other than nylon for example, a polyester tape
  • the bending restricting member 10 can be configured using a fabric such as a woven fabric or a non-woven fabric, a knitted fabric, an artificial leather, or the like.
  • the bending restricting member is made of fabric, artificial leather, or the like, the bending restricting member is made of a material having poor stretchability. Therefore, when the bending of the sole progresses, the bending restricting between the opening edges of the groove is performed.
  • the bending restricting member When the member receives a force in the extending direction from the state where the member is stretched in a straight line, the bending restricting member effectively acts to restrict the bending of the sole. Thereby, the bending resistance of the sole can be effectively increased in the second half of the kicking out phase during running. Further, in this case, since the bending restriction member made of fabric has a very small bending resistance and can be deformed, if the bent state is kept bent, little force is required to change the bent state. Therefore, the cloth-made bending regulating member does not become a bending resistance of the sole at the initial stage of bending of the sole, and can promote free bending of the sole. Further, the bending restricting member 10 may be configured by extending the lower plate 5 to the opening of the groove 41.
  • the bending regulating member 10 has been described by taking a belt-like or tape-like one as an example, but the application of the present invention is not limited to this.
  • a linear member may be adopted as the bending restricting member.
  • the same reference numerals as those in the first to fourth embodiments denote the same or corresponding parts.
  • the bending restricting member 10 ′′ is substantially V-shaped or substantially U-shaped in the lateral direction, that is, in the shoe width direction (left-right direction in FIG. 9) between the opening edges of the groove 41.
  • the bending restricting member 10 is a side that bends in a substantially V-shape or a substantially U-shape to the side. It has a laterally bent portion 10 ′′ a, and both end portions in the front-rear direction connect each opening edge portion of the groove 41.
  • the bending restricting member 10 ′′ is made of, for example, nylon wire or other resin. Wire, yarn, twisted yarn or the like is used. In this case, in the initial stage of bending of the sole, the bending regulating member 10 ′′ is bent from the bent state by deforming the side bending portion 10 ′′ a so that the amount of bending to the side gradually decreases. It grows gradually.
  • the tensile elastic modulus and the bending elastic modulus of the bending regulating member 10 ′′ can be changed.
  • the regulation action by the member 10 "can be easily adjusted.
  • the bending restricting member 10 when the bending restricting member 10 is composed of a fabric member having poor stretchability, the bending restricting member 10 is composed of a fabric sheet that covers the ground-side surface of the lower midsole 4. At the same time, a large number of outsole chips that are separately arranged may be fixed to the surface on the grounding surface side of the fabric sheet.
  • FIG. 11 shows a sixth embodiment of the present invention using such a fabric sheet.
  • the same reference numerals as those in the first embodiment denote the same or equivalent parts.
  • fabric sheets 10A, 10B, and 10C are attached to the lower surface of the lower midsole 4.
  • Fabric made sheet 10A is disposed on the front side area F 1 of the forefoot of the shoe, fabric made sheet 10B is disposed in the front-rear direction center area F 2 of the forefoot of the shoe, the fabric made 10C, the forefoot of the shoe It is located in the region F 3 of toward midfoot from the rear end side region of the part.
  • the fabric sheets 10B and 10C are disposed on both front and rear sides of the groove 41, and the rear end of the fabric sheet 10B and the front end of the fabric sheet 10C are a pair of left and right extending across the groove 41. Are connected by a belt-like sheet connecting portion 10e.
  • the sheet connecting portion 10e is also made of a cloth, and is integrally connected to the cloth sheets 10B and 10C, and is bent in an inverted U shape upward in the groove 41.
  • a large number of outsole chips (outsole pieces) 7p are fixed to the surface of each fabric sheet 10A, 10B, 10C on the grounding surface side.
  • the outsole chip 7p is a small outsole member having a hexagonal shape or a rectangular shape, for example, and is integrated on the fabric sheets 10A, 10B, and 10C by insert molding or the like.
  • the fabric sheets 10A, 10B, and 10C are used as a base material for a large number of outsole chips 7p, the fabric sheets 10A, 10B, and 10C and the large number of outsole chips are integrally molded to form a single unit It is possible to form a unit, whereby the assembly process of the sole structure can be simplified and the weight can be reduced.
  • the bending restricting member 10 is provided on both the inner shell side and the outer shell side of the sole, but the application of the present invention is not limited to this.
  • the bending restricting member 10 may be provided only on the inner shell side or the outer shell side of the sole.
  • a shoe suitable for a runner who tends to pronation during running can be realized. That is, in this case, in the second half of the kicking phase during running, the bending resistance on the inner shell side of the sole is relatively increased and the bending of the inner shell side of the sole is restricted. Energy loss in the second half can be reduced.
  • the shoes suitable for the runner which has the tendency of rotation (supplement) at the time of running are realizable. That is, in this case, in the second half of the kicking phase during running, the bending resistance on the outer side of the sole is relatively increased and the bending of the outer side of the sole is restricted, thereby Energy loss in the second half can be reduced.
  • the bending restricting member 10 is provided on both the inner shell side and the outer shell side of the sole, there is a tendency of either pronation or pronation during running. Shoes that can handle runners can be realized.
  • each bending restriction member 10 provided on the inner and / or outer side may be configured by a plurality of bending restriction members.
  • each bending restricting member 10 provided on the inner and outer sides of the sole has substantially the same width.
  • the width of the bending restriction member 10 on the side may be larger than the width of the bending restriction member 10 on the outer side.
  • the width of the bending restriction member 10 here means the total width of each bending restriction member.
  • the number of bending restriction members 10 provided on the inner side is larger than the number of bending restriction members 10 provided on the outer side. It may be.
  • the inner forefoot area of the sole forefoot is generally in contact with the ground for a longer time than the outer side area, so the flexion angle of the MP joint is larger for the inner side area than for the outer side area.
  • the width (or the number) of the bending restriction members 10 in the inner side area which needs to have a larger bending restriction action when the sole is bent, is larger than the width (or the number) of the bending restriction members 10 in the outer side area. It was bigger (or more).
  • the present invention is useful for a shoe sole structure, and is particularly suitable for a user who wants to obtain a smoother riding feeling during running by reducing energy loss in running shoes.

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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

La présente invention a trait à une structure de semelle qui permet de réduire la perte d'énergie lors d'une course. La structure de semelle (1) destinée à une chaussure selon la présente invention est équipée : d'une plaque supérieure (3) qui est disposée dans la partie supérieure de la structure de semelle (1) et qui s'étire de l'avant vers l'arrière de la semelle ; d'un intercalaire inférieur (4) qui est constitué d'un élément élastique lisse, qui est disposé sous la plaque supérieure (3), qui est fixé sur la surface inférieure de la plaque supérieure (3), et qui est doté d'une rainure (41) qui s'ouvre vers le bas et qui s'étire dans la direction de la largeur de la semelle ; et de sections de restriction de pliure (10) qui sont prévues dans un état plié dans la direction de la longueur de la semelle entre des sections de bord de l'ouverture de la rainure (41), et qui connectent les sections de bord de l'ouverture. Lorsque la semelle commence à se plier, les sections de restriction de pliure (10) permettent à la semelle de se plier depuis l'état plié des sections de restriction de pliure (10) jusqu'à ce que les sections de restriction de pliure (10) soient graduellement étirées en une ligne droite entre les sections de bord de l'ouverture, et une fois que la semelle a été pliée, les sections de restriction de pliure (10) restreignent la pliure de la semelle en recevant la force dans la direction d'extension lorsque la ligne droite est étirée entre les sections de bord de l'ouverture.
PCT/JP2011/058479 2010-04-02 2011-03-28 Structure de semelle destinée à une chaussure WO2011125959A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BR112012020621-4A BR112012020621A2 (pt) 2010-04-02 2011-03-28 estrutura de sola para um calçado.
EP11765859A EP2554070A1 (fr) 2010-04-02 2011-03-28 Structure de semelle destinée à une chaussure
AU2011236925A AU2011236925A1 (en) 2010-04-02 2011-03-28 Sole structure for shoe
JP2012509641A JP5392954B2 (ja) 2010-04-02 2011-03-28 シューズのソール構造体
CN201180016795XA CN102821633A (zh) 2010-04-02 2011-03-28 鞋子的鞋底结构体
CA2787326A CA2787326A1 (fr) 2010-04-02 2011-03-28 Structure de semelle destinee a une chaussure

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JP2010-085924 2010-04-02
JP2010085924 2010-04-02

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AU (1) AU2011236925A1 (fr)
BR (1) BR112012020621A2 (fr)
CA (1) CA2787326A1 (fr)
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JP6722709B2 (ja) 2018-03-20 2020-07-15 美津濃株式会社 ソール構造およびシューズ
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JP2018011769A (ja) * 2016-07-21 2018-01-25 株式会社 Ａｋａｉｓｈｉ 靴底、履物及び履物の靴底の変形方法
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EP2554070A1 (fr) 2013-02-06
JP5392954B2 (ja) 2014-01-22
JPWO2011125959A1 (ja) 2013-07-11
AU2011236925A1 (en) 2012-08-30
BR112012020621A2 (pt) 2018-03-20
US20110239489A1 (en) 2011-10-06
TW201201727A (en) 2012-01-16
CA2787326A1 (fr) 2011-10-13
CN102821633A (zh) 2012-12-12

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