WO2019203285A1 - Semelle pour pied artificiel de sport - Google Patents

Semelle pour pied artificiel de sport Download PDF

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Publication number
WO2019203285A1
WO2019203285A1 PCT/JP2019/016542 JP2019016542W WO2019203285A1 WO 2019203285 A1 WO2019203285 A1 WO 2019203285A1 JP 2019016542 W JP2019016542 W JP 2019016542W WO 2019203285 A1 WO2019203285 A1 WO 2019203285A1
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WO
WIPO (PCT)
Prior art keywords
sole
width direction
width
competition
land
Prior art date
Application number
PCT/JP2019/016542
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English (en)
Japanese (ja)
Inventor
大太 糸井
耕平 佐橋
Original Assignee
株式会社ブリヂストン
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社ブリヂストン filed Critical 株式会社ブリヂストン
Priority to JP2020514423A priority Critical patent/JPWO2019203285A1/ja
Publication of WO2019203285A1 publication Critical patent/WO2019203285A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/50—Prostheses not implantable in the body
    • A61F2/60—Artificial legs or feet or parts thereof
    • A61F2/66—Feet; Ankle joints

Definitions

  • the present invention relates to a sole that is attached to a contact area of a prosthetic leg for competition, and more particularly to a sole for a prosthetic leg that suppresses slippage of the prosthetic leg during competition.
  • a prosthetic leg for competition (hereinafter also referred to as a prosthetic leg for competition or simply a prosthetic leg) has a leaf spring-like leg part extending to the toe side through the curved part, and the contact area extends in an arc shape from the toe to the curved part side.
  • a prosthetic leg having a leaf spring-like foot portion is provided with a sole that contacts the road surface on the bottom surface of the contact area.
  • Patent Document 1 exemplifies a sole that is attached to the lower surface of a curved plate spring-like prosthetic leg for competition, such as jogging or running. That is, Patent Document 1 describes a sole in which spikes are attached to the lower surface of a sole that contacts the road surface, and a sole in which a number of outsole portions each having a hexagonal ground surface are provided.
  • an object of the present invention is to provide a sole for a prosthetic leg for competition, in which the service life of the entire sole is extended by suppressing uneven wear of the sole.
  • the inventor earnestly investigated the means for solving the above-mentioned problems.
  • a detailed study of the wear pattern of the bottom of the sole of the prosthetic leg for competition revealed that the wear mode of the half-width region bordering on the dividing line of the width of the bottom of the sole was different. Based on this, the present invention has been completed.
  • an object of the present invention is to provide a sole of a prosthetic leg for competition having improved uneven wear resistance.
  • the sole of the prosthetic leg for competition of the present invention is a contact of the prosthetic leg having a leaf spring shape extending toward the toe side through at least one curved part and extending in an arc shape from the toe to the curved part side.
  • a sole to be worn in a region the sole having a bottom surface shaped according to the extending shape of the contact region, and the bottom surface is partitioned by a plurality of widthwise grooves extending in the width direction of the foot.
  • the width direction land portion on one side in the width direction having a plurality of width direction land portions extending in the width direction and having a center line extending in the front-rear direction of the foot portion through the center in the width direction as a boundary.
  • the total surface area is larger than the total surface area of the width direction land portion on the other side.
  • FIG. 1 It is a side view of the artificial leg for competition with which the sole concerning a 1st embodiment of the present invention was equipped. It is a figure which shows the pattern of the sole bottom face of the sole of the artificial leg for competitions concerning 1st Embodiment. It is a figure which shows one shape of the width direction land part of FIG. It is a figure for explaining the operation
  • FIG. 1 is a side view of a prosthetic leg 1 for competition equipped with a sole 5 according to the first embodiment of the present invention.
  • the prosthetic leg 1 for competition has a leaf spring-like leg 2 and a sole 5 is attached to a contact area on the tip side.
  • the base end part of the foot part 2 is connected to a socket via an adapter, and a wearer wears a prosthetic leg by accommodating the stump of a wearer's leg in a socket. be able to.
  • As the adapter and the socket those corresponding to the stump position of the foot such as a thigh prosthesis and a crus prosthesis are used.
  • FIG. 1 shows the foot 2 and the sole 5 in an upright state of a wearer who wears the prosthetic leg 1 for competition.
  • the side where the foot 2 is connected to the adapter is referred to as the connection side
  • the side where the foot 2 contacts the road surface S is referred to as the ground side.
  • the toe T of the prosthetic leg 1 for competition refers to the foremost point where the foot 2 extends from the connection side and terminates.
  • a direction extending from the toe T in parallel to the road surface S is referred to as a foot front-rear direction Y.
  • the direction over the width direction of the foot 2 is referred to as the width direction W.
  • the foot portion 2 of the prosthetic leg 1 for competition has a shape extending in a plate shape toward the toe T via at least one curved portion, in the illustrated example, 1 curved portion 3.
  • the foot part 2 includes, in order from the connection side to the ground side, a straight part 2 a, a curved part 2 b that is convex toward the toe T side, a curved part 3 that is convex toward the rear side in the foot front-rear direction Y, The curved portion 2c and the grounding portion 4 extending to the toe T side in an arc shape protruding to the grounding side.
  • the material of the foot 2 is not limited, it is preferable to use carbon fiber reinforced plastic or the like from the viewpoint of strength and weight reduction.
  • the grounding portion 4 has, on the grounding side, a contact area 4s extending in an arc shape from the toe T toward the bending portion 3, and a sole 5 is attached to the contact area 4s.
  • the contact area 4s refers to the entire area that comes into contact with the road surface S when the wearer who wears the prosthetic leg 1 performs a straight traveling operation. In the state where the sole 5 is attached, the contact area 4s is the sole 5 It contacts with the road surface S via.
  • the sole 5 has a shape according to the extended shape of the contact area 4s.
  • the grounding side of the sole 5 is a bottom surface 5s.
  • the bottom surface 5s has a shape in which the arcs X1 and X2 are continuous from the toe T side to the bending portion 3 side.
  • the arc X1 and the arc X2 have different radii of curvature, but may have the same radius of curvature.
  • the bottom surface 5 s has a plurality of width direction land portions 12 extending in the width direction W and defined by a plurality of width direction grooves extending along the width direction W.
  • the total surface area a1 of the land portion in the width direction on one side Si1 in the width direction W with the center line CL extending through the center in the width direction of the bottom surface 5s extending in the foot front-rear direction Y as the boundary is It is larger than the total surface area a2 of the width direction land portion 12 in Si2.
  • the total surface area a1 refers to a total sum of the surface areas of land portions from the center line CL to the bottom surface end portion SE1 of the one side Si1 in the plan view of the bottom surface 5s
  • the total surface area a2 refers to the bottom surface 5s.
  • the total surface area of the land from the center line CL to the bottom surface end SE2 of the other side Si2 is a total value.
  • the width direction land portion 12 has a structure extending across the center line CL, and the surface area of each width direction land portion 12 is one side Si1 with the center line CL as a boundary even in one width direction land portion 12. And the other side Si2.
  • wear on one side with the center line CL of the bottom surface 5s as a boundary tends to progress, and uneven wear tends to occur on the bottom surface 5s.
  • the rigidity is increased, and the wear resistance performance is improved. Further, uneven wear of the entire bottom surface 5s can be suppressed.
  • the width direction land portions has a non-axisymmetric shape with respect to the center line CL.
  • all the width direction land portions 12 are axisymmetric with respect to the center line CL, but some width direction land portions are axisymmetric and some width direction land portions are axisymmetric shapes. It is good also as what has.
  • the non-axisymmetric widthwise land portions 12, and in the illustrated example, all the widthwise land portions 12 have a wavy shape in which the width of the land portion at a half wavelength of the wave is a repetition of wide and narrow.
  • variety of one side is wide in 1 wavelength of the wave which becomes convex on the toe side.
  • wave refers to a sine wave, zigzag, unevenness, or the like that has substantially the same shape that changes phase with substantially the same period, and is preferably a sine wave or a zigzag shape having the same phase. In the present embodiment, as shown in FIG.
  • the land portion width that extends along the wavy line P ⁇ b> 2 exhibiting such a wave shape and that is the width in the normal direction of the wavy line is changed. That is, it has a wave shape in which the land width in the half wavelength of the wave (wave peak to valley or valley to peak) is wide and narrow.
  • the width-direction land portion 12 has a half-wavelength portion ⁇ 3, that is, a land portion width w1 from the valley V2 of the wavy line P2 to the adjacent mountain M2.
  • the land part width w2 from the mountain M2 to the adjacent valley V2 has a wave shape in which the land part width w1 is relatively wide and the land part width w2 is narrow.
  • the land width w1 on the bottom end SE1 side is wide at one wavelength of a wave that protrudes toward the toe T, that is, ⁇ 3 in the illustrated example.
  • the ratio w1 / w2 of the land widths w1 and w2 is preferably 2.0 to 15. More preferably, the land widths w1 and w2 satisfy the following numerical ranges. 2.0mm ⁇ w1 ⁇ 4.0mm 0.3mm ⁇ w2 ⁇ 1.0mm
  • the shape of the land portion is not particularly limited as long as the total surface area a1 is larger than the total surface area a2.
  • a portion having the land portion width w1 is set on the other side. By arranging more than Si2, total surface area a1 is larger than total surface area a2.
  • the one side Si1 is preferably outside the bottom surface 5s.
  • the outside is the body side of the wearer of the prosthetic leg 1 for competition.
  • the prosthetic leg 1 for competition there are many wearers who run in such a manner that the input from the outside to the inside of the bottom surface 5s increases, and wear on the outside of the bottom surface 5s tends to progress. Therefore, the uneven wear of the bottom surface 5s can be suppressed by increasing the wear resistance performance outside the bottom surface 5s.
  • the sole of the prosthetic leg for competition according to the second embodiment has the same basic configuration as that of the first embodiment, and is different from the first embodiment only in the groove pattern of the bottom surface 5s.
  • FIGS. 4A, 4B, 4C, and 4D are for explaining step by step the operation of the foot 2 and the ground contact form with the bottom surface 50s when the wearer wearing the competition artificial leg 1 travels straight ahead.
  • FIG. The upper part of each drawing is a side view of the foot 2 and the sole 5, and the lower part of each drawing is the transition of the ground contact form of the bottom surface 50s when the wearer wearing the competition prosthetic leg 1 performs a straight running operation. Is shown.
  • FIG. 4A shows a state in which the competition artificial leg 1 lifted by the wearer is lowered onto the road surface S and the entire weight is loaded on the competition artificial leg 1.
  • the contact area of the bottom surface 50s is in the vicinity of the center of the bottom surface, and is spaced from the curved part 3 and the toe T side in the front-rear direction. It is a free area.
  • FIG. 4B shows a state in which the wearer steps forward from the state of FIG. 4A while the full weight is loaded on the prosthetic leg 1 for competition.
  • the prosthetic leg for competition 1 is more curved than where it was grounded first. The grounding area has moved to the part 3 side.
  • FIG. 4C shows a state in which the wearer swings forward the opposite leg to the side on which the athletic prosthetic leg 1 is worn and starts to kick out the athletic prosthetic leg 1.
  • the game prosthetic leg 1 is grounded in a region on the toe T side of the bottom surface 50s from the region shown in FIGS. 4A and 4B.
  • FIG. 4D shows a state immediately before leaving the road surface S at the final stage where the wearer kicks out the prosthetic leg 1 for competition.
  • the grounding is performed in a region closer to the toe T than FIG. 4C.
  • the groove pattern shown in FIG. 5 is the same as the groove pattern shown in FIG. 2 except that the three rows of the width direction land portions 12 are left and the sipe 13 is formed on the toe T side of the width direction land portion 12.
  • the width direction land portions 14, 10 and 11 are sequentially arranged on the curved portion 3 side of the row of land portions 12, respectively.
  • width direction land portions 10, 11, 12, and 14 arranged on the curved portion 3 side of the width direction land portion 12 will be described with reference to FIGS.
  • the width-direction land portion 10 is a land portion that extends with a predetermined width along a wavy line P ⁇ b> 1 that exhibits a wave shape based on the above-described wave definition.
  • the width direction land portion 10 corrugated, the edge component in the width direction W can be increased and the edge component in the front-rear direction can also be imparted, and a higher edge effect can be obtained overall. Can do. That is, even if the input direction is deviated from the width direction W when the wearer of the prosthetic leg 1 is running, the edge effect can be sufficiently exhibited.
  • the wavy shape in the width direction land portion 10 means that the toe protrudes from the position of the peak M ⁇ b> 1 and the valley V ⁇ b> 1 of the wavy line P ⁇ b> 1 to one side or the other side in the foot front-rear direction.
  • the edge component can be further increased, and the edge effect in both the foot front-rear direction Y and the width direction W can be enhanced.
  • the width-direction land portion 10 is line-symmetric with respect to a line segment extending in the foot front-rear direction Y through the wave peak M1 or valley V1 in one wave wavelength (wave peak-to-peak or valley-to-valley). It is preferable. As shown in FIG. 6, the width-direction land portion 10 is axisymmetric with respect to a line segment b1 extending in the foot front-rear direction Y through the mountain M1 of the wave line P1 in one wave portion ⁇ 1 of the wave. The minute ⁇ 2 is line-symmetric with respect to a line segment b2 that extends in the foot front-rear direction Y through the valley V1. According to the said structure, even if an input direction shifts
  • the area where the width direction land portions 10, 11 and 14 are arranged corresponds to the ground contact area shown in FIGS. 4A and 4B above, and the wearer first lands, and the total weight is on the prosthetic leg 1 for competition.
  • This is the area where the stepping action is performed in a loaded state. Therefore, it is important that the region is sufficiently gripped with the road surface S so that the balance of the entire body is maintained even if the wearer applies the total weight to the prosthetic leg 1 for competition. Therefore, by arranging the width direction land portion 10 excellent in the edge effect in the width direction W and the width direction land portions 11 and 14 similar to the width direction land portion 10, a high edge function is given to the region. In addition, a sufficient grip force for the road surface S is ensured, and a high slip resistance performance is given to the area.
  • the bottom surface 50s is preferably provided with a sipe 13 in a region on the toe T side of the width direction land portion 12 and from the edge on the toe T side toward the curved portion 3 side.
  • the wearer swings forward the foot opposite to the side on which the prosthetic leg 1 is worn, and performs the kick-out operation of the prosthetic leg 1 for competition. It is an area.
  • This region is a region where wear is particularly likely to proceed because the grounding is made in order toward the toe T and the wearer touches and slides the road surface S on the bottom surface 50s. Therefore, in this region, it is important to improve the wear resistance and maintain the resistance to slipping during ground contact.
  • the constant region from the edge of the bottom surface 50s on the toe T side where the sipe 13 is formed is a region corresponding to the arc X1 continuous from the toe T with a constant radius of curvature in FIG.
  • the wearer wearing the competition prosthetic leg 1 performs the kicking-out operation, the wearer tends to come into contact with the ground at the end to cause more severe wear. Therefore, in this region, it is necessary to provide particularly high wear resistance. Therefore, the sipe 13 having a width smaller than that of the groove formed in another region is formed, and the edge component is distributed without impairing the rigidity. Therefore, the sole 5 can be protected from intense wear, and the service life of the foot 2 itself can be extended.
  • the region where the width direction land portion 12 is arranged is a state before the above-described state shown in FIG. 4D, that is, as shown in FIG. This is a region that is grounded when the operation is started.
  • the input difference between the one side Si1 and the other side Si2 with the center line CL as a boundary is particularly significant depending on the shape of the artificial leg and the wearer's running method. This is the area. Therefore, by arranging the width direction land portion 12 in this region, the land portion rigidity on the side where more severe wear occurs can be increased, and uneven wear of the bottom surface 5s can be effectively suppressed.
  • the angle ⁇ 1 formed by the wave line P2 of the wave direction land 12 shown in FIG. 3 and the reference line O1 of the wave line P2 is the wave line of the width direction land part 10 shown in FIG.
  • the angle ⁇ 2 is preferably smaller than the angle ⁇ 2 formed by P1 and the reference line O2 of the wavy line P1.
  • the reference line O1 and the reference line O2 extend in a direction along the width direction W.
  • the inventive example sole and the comparative example sole of the present invention are respectively prototyped and subjected to performance evaluation.
  • the invention example sole is provided with functions such as drainage performance defined in the present invention by the arrangement of the pattern of the bottom surface of the sole and the change of the groove.
  • Comparative Example 1 is a sole having a bottom surface with a line-symmetric pattern with respect to the center line CL, and the total surface areas of the land portions on both sides with respect to the center line are the same.
  • Inventive Example 1 is a sole having the bottom surface of the pattern shown in FIG.
  • Invention Example 2 is a sole having the bottom surface of the pattern shown in FIG.
  • the comparative example sole and the invention example sole manufactured as described above are mounted on the prosthetic leg for competition shown in FIG. 1 to evaluate uneven wear resistance.
  • a player with healthy legs on the left side wears a prosthetic leg for competition on the right side, and indexes the appearance of the bottom of the sole after traveling 200 km on public roads.
  • the index of the comparative example 1 is set to 100, and it shows that the one where an index difference is larger is excellent in partial wear-proof performance.
  • Comparative Example 1 and Inventive Example 2 a player with healthy feet on the left side wears a prosthetic leg for competition on the right side, and the appearance of the bottom surface of the sole is indexed after traveling 200 km on a public road.
  • the appearance of the bottom surface of the sole is indexed after a player with healthy legs on the left side wears a prosthetic leg for competition on the right side and travels 200 km on a public road.

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  • Health & Medical Sciences (AREA)
  • Transplantation (AREA)
  • Biomedical Technology (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Abstract

Cette semelle, pour un pied artificiel de sport ayant une partie pied en forme de ressort à lame s'étendant vers le côté orteils, est montée, par l'intermédiaire d'au moins une partie courbée, à une région de contact avec le sol s'étendant dans une forme d'arc allant de l'orteil au côté de la partie courbée. La semelle a une surface inférieure ayant une forme se conformant à la forme d'extension de la région de contact avec le sol. La surface inférieure a une pluralité de parties d'appui dans la direction de la largeur qui s'étendent dans la direction de la largeur de la partie pied et qui sont démarquées par une pluralité de rainures dans la direction de largeur s'étendant dans la direction de la largeur. La surface totale des parties d'appui dans la direction de la largeur sur un côté dans la direction de la largeur est plus grande que celle des parties d'appui dans la direction de la largeur sur l'autre côté, une ligne centrale qui passe à travers le centre dans la direction de la largeur et s'étendant dans la direction longitudinale de la partie pied est définie en tant que limite entre elles.
PCT/JP2019/016542 2018-04-17 2019-04-17 Semelle pour pied artificiel de sport WO2019203285A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2020514423A JPWO2019203285A1 (ja) 2018-04-17 2019-04-17 競技用義足のソール

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018079462 2018-04-17
JP2018-079462 2018-04-17

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WO2019203285A1 true WO2019203285A1 (fr) 2019-10-24

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02257902A (ja) * 1988-08-29 1990-10-18 Sachiko Kosaka 背丈を高く見せる靴
US20150181976A1 (en) * 2013-12-27 2015-07-02 Nike, Inc. Sole structure for an article of footwear with abrasion resistant outsole and method of manufacturing same
US20170281371A1 (en) * 2016-03-31 2017-10-05 Nike, Inc. Prosthetic Blade Attachment System

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02257902A (ja) * 1988-08-29 1990-10-18 Sachiko Kosaka 背丈を高く見せる靴
US20150181976A1 (en) * 2013-12-27 2015-07-02 Nike, Inc. Sole structure for an article of footwear with abrasion resistant outsole and method of manufacturing same
US20170281371A1 (en) * 2016-03-31 2017-10-05 Nike, Inc. Prosthetic Blade Attachment System

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