WO2019203282A1 - Semelle pour pied artificiel de sport - Google Patents

Semelle pour pied artificiel de sport Download PDF

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Publication number
WO2019203282A1
WO2019203282A1 PCT/JP2019/016536 JP2019016536W WO2019203282A1 WO 2019203282 A1 WO2019203282 A1 WO 2019203282A1 JP 2019016536 W JP2019016536 W JP 2019016536W WO 2019203282 A1 WO2019203282 A1 WO 2019203282A1
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WO
WIPO (PCT)
Prior art keywords
region
sole
area
wear
drainage
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Application number
PCT/JP2019/016536
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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 JP2020514420A priority Critical patent/JP7201670B2/ja
Publication of WO2019203282A1 publication Critical patent/WO2019203282A1/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

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 having a high anti-slip performance.
  • the inventors diligently investigated the means for solving the above problems. That is, when the ground contact form of the prosthetic leg for competition was examined in detail, it was newly found out that the prosthetic leg for competition shows a specific ground contact form resulting from the shape of the leaf spring-like foot part. Furthermore, the inventors have found that a high anti-slip performance can be realized by separating the function of the sole by making the bottom surface of the sole correspond to the ground contact form peculiar to the prosthetic leg for competition, and have completed the present invention. It was.
  • the gist of the present invention is as follows.
  • a sole of a sports prosthesis to be attached to a contact area of a prosthetic leg for competition, and a bottom surface is provided with a wear-resistant area having wear resistance and a drainage area having drainage performance.
  • the virtual straight line extending in parallel to the sole width direction is defined at the center position in the front-rear direction of the sole, the area of the wear-resistant region in the front region on the toe side with the virtual straight line as a boundary of the bottom surface is
  • the sole of the prosthetic leg for competition is larger than the area of the drainage area and in the rear area on the heel side of the bottom surface with the virtual straight line as the boundary, the area of the drainage area is larger than the area of the wear-resistant area.
  • the present invention it is possible to provide a sole for a prosthetic leg having a high anti-slip performance. By wearing this sole on the prosthetic leg for competition, there is an effect that the athlete's skill is exhibited.
  • 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 for demonstrating stepwise 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 in parallel with the road surface S from the toe T is referred to as a foot front-rear direction Y (the same direction as the sole front-rear direction Z when upright).
  • the direction over the width direction of the foot 2 is referred to as a width direction W (also referred to as a sole 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 5s is a side on which a line extending in the width direction W passes through a point C that is a contact point with the road surface S in a side view when the sports prosthetic leg 1 is worn and the wearer stands upright.
  • Point C is a point that first comes into contact with the road surface S when it stands upright in a side view. That is, the upright state means that the wearer is a healthy leg that does not wear a prosthetic leg when only one is a prosthetic leg, and the prosthetic leg 1 for the competition is on the road surface S when the body is supported by one prosthetic leg when both are prosthetic legs. The state which contacted with the road surface S for the first time.
  • the point C is determined by the shape of the artificial leg, the wearing mode, and the like. That is, the inventors have the point C where the boundary of the bottom surface 5s for separating the function of the bottom surface 5s based on the knowledge about the ground contact form obtained by the experiment described later is a contact point with the road surface S in the upright state of the wearer. I came up with a new idea to become a standard.
  • FIGS. 2A, 2B, 2C, and 2D show stepwise the operation of the foot 2 and the ground contact form of the bottom surface 5s when the wearer who wears the prosthetic leg 1 for competition having the above-described configuration travels straight ahead. It is a figure for demonstrating. 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 a transition of the ground contact form of the bottom surface 5s when the wearer wearing the competition prosthetic leg 1 performs a straight running operation. Is shown.
  • FIG. 2A shows a state in which the competition prosthetic leg 1 lifted by the wearer is lowered onto the road surface S and the overall weight is loaded on the competition prosthetic leg 1.
  • a region on the curved portion 3 side from the point C on the bottom surface 5s is grounded.
  • FIG. 2B shows a state in which the wearer steps forward from the state of FIG. 2A 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. 2C shows a state in which the wearer swings forward the foot opposite to the side on which the game prosthetic leg 1 is worn and starts to kick out the game prosthetic leg 1.
  • the game prosthetic leg 1 is grounded in the region of the bottom surface 5s closer to the toe T than the point C.
  • FIG. 2D shows a state immediately before the wearer kicks out the prosthetic leg 1 for competition, just before leaving the road surface S.
  • FIG. In order to kick out from the toe T on the bottom surface 5s, it is grounded on the toe T side further than FIG. 2C.
  • the bottom surface 5s is divided into the curved portion side region Q1 and the toe side region Q2 with the point C as a boundary. Divided. FIG. 3 shows the bottom surface 5s in a flat state not along the contact area 4s of the prosthetic leg 1 for competition.
  • the curved portion side region Q1 is a region on the curved portion 3 side with a line BL extending through the point C in the width direction W (sole width direction W) passing through the point C on the bottom surface 5s.
  • the curved portion side region Q1 is a region where the wearer first lands and performs a stepping motion while the overall weight is loaded on the prosthetic leg 1 for competition. Therefore, it is important that the curved portion side region Q1 is sufficiently gripped with the road surface S so that the balance of the entire body is maintained even when the wearer applies the overall weight to the prosthetic leg 1 for competition.
  • the sole 5 of the athletic prosthetic foot 1 prevents slipping due to the water film and realizes a high slip resistance performance.
  • the toe-side region Q2 is a region on the toe-T side having a line BL extending through the point C in the width direction W (sole width direction W) as a boundary on the bottom surface 5s.
  • the toe side region Q2 is a region for the wearer to swing out the foot opposite to the side on which the prosthetic leg 1 for competition is worn and to kick out the prosthetic leg 1 for competition.
  • the toe-side region Q2 is a region where wear is particularly likely to proceed because the wearer makes contact with the toe T in order and makes contact with the wearer so that the wearer pushes and slides the road surface S on the bottom surface 5s. Therefore, the toe side region Q2 needs to have higher wear resistance than the curved portion side region Q1.
  • the toe side region Q2 has higher wear resistance than the curved portion side region Q1, early wear of the toe side region Q2 is avoided, so that the entire surface of the sole 5 of the athletic prosthesis 1 is gently worn. As a result, the service life of the sole 5 can be extended.
  • each of the bending portion side region Q1 and the toe side region Q2 is further divided as shown in FIG. 3 based on the ground contact form shown in FIGS. 2A to 2D, and each part has characteristics corresponding to the ground contact form. Is preferably provided.
  • the portion Q2-1 in the toe side region Q2 shown in FIG. 3 corresponds to the arc X1 continuous from the toe T with a constant radius of curvature in FIG.
  • This portion Q2-1 tended to cause more intense wear when the wearer wearing the prosthetic leg 1 for competition performed a kicking operation and finally touched down. Therefore, the portion Q2-1 needs to have particularly high wear resistance. That is, in the toe side region Q2, the portion Q2-1 has higher wear resistance than the remaining portion Q2-2, thereby protecting the sole 5 from severe wear and extending the service life of the foot 2 itself. can do.
  • a portion Q1-1 closer to the toe T than the center M1 of the maximum length L1 along the foot front-rear direction Y is a region where the wearer first lands.
  • the portion Q1-2 is a portion closer to the curved portion 3 than the center M1 having the maximum length L1.
  • the grounded portion is located on the curved portion 3 side, that is, the portion Q1-2 on the opposite side to the direction in which the wearer proceeds, with respect to the first grounded portion Q1-1. It is changing.
  • the portion Q1-2 When the part Q1-2 is in contact with the ground, the movement of the upper body that the wearer tries to move forward and the movement of the grounding part are temporarily reversed, and the movement toward the second half of the grounding form is high. Propulsion is required. Therefore, first, it is important that the portion Q1-2 has higher rigidity than the portion Q1-1.
  • the portion Q1-2 has a larger edge component in the width direction W of the foot 2 than the portion Q1-1.
  • the part Q1-2 is preferably smaller than the part Q1-1.
  • the negative ratio refers to the ratio of the area in plan view of the portion that is concave with respect to the road surface S in the total area of the bottom surface 5s in plan view.
  • the portion Q1-2 has a larger edge component in the width direction W of the foot portion 2 than the toe side region Q2. Furthermore, it is preferable that the portion Q1-2 has a larger negative ratio than the toe side region Q2. According to the above configuration, the portion Q1-2 can exert a high driving force when the wearer performs the kicking-out operation.
  • Specific means for realizing the above-described characteristics to be imparted to each portion of the above-described bottom surface 5s include, for example, devising a pattern made of unevenness by a groove or the like formed on the bottom surface 5s, and the surface of the bottom surface 5s. For example, devising the properties, devising the cross-sectional shape of the sole 5, devising the material of the sole 5, and the like.
  • FIG. 4 is a diagram illustrating a pattern of the bottom surface 5s of the sole 5 in the prosthetic leg 1 for competition according to the present embodiment.
  • a plurality of land portions 10 and land portions 11 that are partitioned by a plurality of grooves extending in the width direction W are arranged in the curved portion side region Q1.
  • the land portion 10 is disposed closer to the toe T than the land portion 11.
  • the land portion 10 includes a width direction extending portion 10a extending substantially zigzag in the width direction W, and a toe extending toward the toe T side from a bent portion that is bent toward the toe T side of the width direction extending portion 10a.
  • the shape includes a side protruding portion 10b and a curved portion side protruding portion 10c extending from the bent portion that is bent toward the curved portion 3 side of the width direction extending portion 10a to the curved portion 3 side.
  • the land portion 11 has a shape including a width direction extending portion 11a, a toe side protruding portion 11b, and a curved portion side protruding portion 11c.
  • the edge component is further increased, and the bottom surface 5s and the road surface S are effectively increased on both sides of the foot front-rear direction Y.
  • the water film existing between the two can be cut, and high drainage performance can be realized.
  • a plurality of land portions 12 that are partitioned by a plurality of grooves extending in the width direction W are arranged in the toe side region Q2.
  • the land portion 12 includes a width direction extending portion 12a extending substantially zigzag in the width direction W, and a bent portion that bends in a direction that protrudes toward the toe T side. Extension of the width direction extending portion 12a from the toe T-side protruding portion 12b extending so as to be convex in the portion front-rear direction Y) and the bent portion bending in the direction of becoming convex on the curved portion 3 side. And a curved portion side protruding portion 12c extending so as to be convex in the existing direction.
  • a plurality of linear grooves 13 extending intermittently along the zigzag shape extending in the width direction W are formed in the toe side region Q2.
  • the land portion 12 is disposed closer to the curved portion 3 than the straight groove 13, and the straight groove 13 is formed closer to the toe T than the land portion 12.
  • a land portion 14 having the same shape as the land portion 11 may be formed in the toe side region Q2.
  • the land portion width w3 of the width direction extending portion 11a of the land portion 11 is larger than the land portion width w2 of the width direction extending portion 10a of the land portion 10.
  • the land part width w4 of the width direction extension part 12a of the land part 12 is larger than the land part widths w2 and w3.
  • the curved portion side region Q1 has a toe side region in which the ratio of the area of the groove portion that is concave with respect to the road surface S in the total area of the bottom surface 5s in plan view, that is, the negative ratio. Greater than Q2. Therefore, in the bending part side area
  • the toe side region Q2 has higher wear resistance than the curved portion side region Q1. This is because the toe side region Q2 has a negative ratio smaller than that of the bending portion side region Q1, and maintains high rigidity.
  • a straight groove 13 is formed in the portion Q2-1.
  • the ground contact portion Q2-1 is more rigid than the remaining portion Q2-2 of the toe side region Q2, and has higher wear resistance.
  • the negative ratio of the portion Q1-1 is larger than that of the portion Q1-2, and more moisture can be taken into and discharged from the groove. That is, the portion Q1-1 has a higher drainage performance than the portion Q1-2.
  • the land portion 11 is disposed in the portion Q1-2, and the land portion width w3 of the land portion 11 is larger than the land portion width w2 of the land portion 10 as described above. . Therefore, the portion Q1-2 has a greater land rigidity than the portion Q1-1. Further, the edge component in the width direction W is larger in the portion Q1-2 than in Q1-1. Further, as described above, the negative ratio of the portion Q1-2 is smaller than that of the portion Q1-1.
  • portion Q1-2 has a larger edge component in the width direction W and a larger negative ratio than the toe side region Q2.
  • the sole of the artificial leg for competition which concerns on the 2nd Embodiment of this invention is demonstrated.
  • the sole of the prosthetic leg for competition according to the second embodiment is the same as that of the first embodiment with respect to the characteristics of each portion of the bottom surface of the sole.
  • a plurality of land portions 100, 110, 120, and 140 that are partitioned by a plurality of grooves extending in the width direction W are arranged on the bottom surface 50s of the sole 5 shown in FIG.
  • the land portions 100, 110, 120, and 140 correspond to the land portions 10, 11, 12, and 14 shown in FIG.
  • the land portions 100, 110, 120, and 140 are two in the depth direction of the groove that divides each land portion.
  • the two-stage structure will be described with reference to the land portion 120.
  • the land portion 120 has a step-like structure in which the second-stage block 120B is mounted on the first-stage block 120A on the groove bottom side in the thickness direction of the sole 5.
  • the staircase portion of the first step block 120A is indicated by a bold line in the drawing.
  • the second stage block 120B has a smaller surface area in plan view than the first stage block 120A, but the second stage block 120B and the first stage block 120A have the same shape.
  • the land portions 100, 110, and 140 also have a staircase structure including stair portions indicated by thick lines.
  • the bottom surface 500s of the sole 5 of the prosthetic leg for competition according to the third embodiment has a shape in which square corners are rounded in plan view by forming a concave groove in the bottom surface 500s in the curved portion side region Q1.
  • the land portion 15 is divided into a plurality of sections. Further, the land portions 16a and 16b are disposed on the curved portion 3 side of the curved portion side region Q1 with respect to the land portion 15.
  • the land portions 16a and 16b have a shape in which square corners are rounded in plan view by forming a concave groove in the bottom surface 500s, and have a larger area in plan view than the land portion 15. Further, the land portion 16b has a larger area in plan view than the land portion 16a. Further, land portions 17a and 17b having the same shape as the land portion 16a and the land portion 16b are also partitioned in the toe side region Q2. Furthermore, a land portion 18a having a shape with rounded rectangular corners in plan view is formed on the toe T side of the toe side region Q2 from the land portions 17a and 17b, and the toe T side is closer to the toe T side than the land portion 18a.
  • the semi-land portion 18b is partitioned in such a manner that the depth of the groove gradually decreases toward the toe T side.
  • a plurality of linear grooves 19a and 19b inclined with respect to the width direction W are arranged on the toe T side of the semi-land portion 18b.
  • a plurality of linear grooves 19 a and 19 b are alternately arranged along the width direction W.
  • a plurality of linear grooves 19 a and 19 b are alternately arranged along the foot front-rear direction Y.
  • the linear groove 19a and the linear groove 19b are inclined in directions opposite to each other with respect to the width direction W.
  • the bending portion side region Q1 and the toe side region Q2 shown in FIG. 6 have the same functions as the bending portion side region Q1 and the toe side region Q2 in the sole of the sports prosthesis according to the first embodiment and the second embodiment by the above configuration. Can be granted.
  • each function is provided with the pattern which consists of unevenness
  • the pattern shown below can be used.
  • Each pattern is demonstrated using FIG.7, FIG8 and FIG.9. 7 and 8 schematically show pattern elements constituting a pattern with unevenness. By changing the number and specifications of these elements for each of the above-described areas and parts, the required functions can be given to each area and each part.
  • FIG. 7 it is possible to use a pattern in which a plurality of vertical grooves 30 extending along the foot front-rear direction Y are formed.
  • moisture taken into the longitudinal groove 30 flows along with the operation of the sole, and the moisture can be efficiently discharged from the end of the longitudinal groove 30.
  • a pattern giving priority to either drainage performance or wear resistance performance can be provided.
  • annular grooves 31 and 32 are formed. According to the annular grooves 31 and 32, moisture can be efficiently taken in and discharged regardless of the direction of various inputs acting on the bottom surface 5s of the sole 5. By making the width and depth of the annular grooves 31 and 32 or the diameter of the ring different for each portion of the bottom surface 5s, a pattern giving priority to either drainage performance or wear resistance can be provided.
  • the bottom surface 5s may be a pattern in which only the above-described vertical groove or only the annular groove is formed, or may be a pattern in which the vertical groove and the annular groove are combined. Furthermore, it is good also as a pattern which combined the annular groove and the horizontal groove.
  • the pattern shown in FIG. 9 can also be used as the bottom pattern.
  • a plurality of vertical grooves 33 having one end or both ends opened are formed on the bottom edge 5000s of the sole 5 at the sole edges on the toe T side and the curved portion 3 side, and communicated with the vertical grooves 33 in the width direction.
  • a plurality of inclined grooves 34, 35, 36, and 37 that are inclined with respect to W and open at the edge of the sole are formed.
  • the inclined grooves 34 and 35 extend incline toward the bending portion 3 from the center in the width direction W of the bottom surface 5000s toward the sole edge in the bending portion side region Q1.
  • the inclined grooves 36 and 37 are inclined and extended toward the toe T side from the center in the width direction of the bottom surface 5000s toward the sole edge.
  • the drainage performance according to the ground contact form of the artificial leg 1 for competitions is realizable. That is, in the bottom surface 5000s, the grounding portion changes from the first grounding portion Q1-1 to the portion Q1-2 on the curved portion 3 side. With the transition operation, the moisture taken into the groove flows along the inclination of the groove from the toe T side to the curved portion 3 side, and is discharged from the opening at the edge of the bottom surface 5000s.
  • the water taken in the groove along with the movement of the ground contact portion from the bending portion side region Q1 to the toe side region Q2 flows along the inclination of the groove from the bending portion 3 side to the toe T side. It is discharged from the opening at the edge of the.
  • efficient drainage can be realized.
  • the groove width is increased in a region where drainage performance is to be prioritized, and the groove width is decreased in regions where wear resistance is prioritized.
  • the depth and number of grooves formed on the bottom surface of the sole 5 are arbitrary.
  • the drainage performance can be further improved by increasing the groove depth.
  • drainage performance can also be improved by increasing the number of grooves.
  • the wear resistance performance and drainage performance can be controlled for each region and for each portion.
  • drainage performance can be improved by forming a plurality of sipes thinner than the groove on the bottom surface of the sole 5. As the number of sipes increases, higher drainage performance can be obtained. For wear resistance performance, this relationship may be reversed. The same applies to the following surface roughness and riblets.
  • the surface roughness can be adjusted by imparting micro unevenness to the bottom surface of the sole 5, thereby improving drainage performance and wear resistance performance. In the case of a rougher surface roughness, moisture can be taken in between the micro unevenness, and high drainage performance can be realized.
  • water attached to the bottom surface can be removed efficiently, and drainage performance can be improved.
  • 10A, 10 ⁇ / b> B, and 10 ⁇ / b> C are schematic cross-sectional views along the width direction W of the sole 5.
  • the thickness of the sole 5 is the thickest at the center in the width direction W, and gradually decreases toward the sole edge side in the width direction W.
  • the sole 5 may have a shape that gradually decreases in thickness as shown in FIG. 10A, or a shape that gradually decreases in thickness in an arc shape as shown in FIG. 10B.
  • the bottom surface of the sole 5 (the lower surfaces of FIGS. 10A and 10B) is grounded, moisture on the road surface S is pushed out from the center side in the width direction W of the sole 5 to the sole edge side. Can be drained automatically.
  • the entire sole 5 may have the above-described configuration, or only a part of the sole 5 may have the above-described configuration.
  • the sole 5 may have a structure having a plurality of cones that protrude toward the grounding side.
  • the sole 5 has a plurality of quadrangular pyramids 40 that protrude toward the grounding side.
  • the bottom surface of the sole 5 is spiked by the plurality of quadrangular pyramids 40, and the water film existing between the bottom surface 5s and the road surface S is effectively cut and grounded from the top portion. Performance can be realized.
  • moisture can pass through the gaps formed between the plurality of quadrangular pyramids 40, high drainage performance can be realized.
  • it is not restricted to a square pyramid, It can also be set as a cone and polygonal cones other than a square pyramid.
  • wear resistance performance can also be realized.
  • FIG. 11A and 11B are perspective views showing the grounding portion 4 and the sole 5.
  • the sole 5 has a hidden groove 41 that opens to the grounding portion 4 side on the boundary surface side between the grounding portion 4 and the sole 5.
  • the hidden groove 41 extends along the width direction W and opens at both end edges of the sole 5. According to the above configuration, the moisture on the road surface is taken into and discharged from the both ends of the foot portion 2 in the width direction W into the hidden groove 41, thereby preventing moisture from entering between the bottom surface 5 s and the road surface S. High drainage performance can be obtained.
  • the sole 5 opens on the side of the interface with the adhesive and on the adhesive side. Grooves or recesses are formed.
  • the sole 5 may have a composite groove in which a circular groove 42 formed on the bottom surface 5s and a groove 43 penetrating the sole 5 along the width direction W communicate with each other. .
  • moisture intervening between the bottom surface 5 s and the road surface S can be taken in from the circular groove 42 and efficiently discharged from the end of the groove 43 penetrating in the width direction W.
  • the rigidity of the sole 5 can be adjusted, and characteristics corresponding to each region of the bottom surface 5s can be imparted.
  • each function is given by devising a part or all of the material of the sole 5
  • felt, sponge, nonwoven fabric or the like can be used for part or all of the sole 5 to enhance drainage performance by the water absorbing action of each material.
  • foamed rubber for part or all of the sole 5 and the water absorption action of the foamed rubber.
  • the sole 5 in the prosthetic leg 1 of the present invention described so far is manufactured by, for example, a method of processing a rubber sheet with a laser beam, a method of using a mold, a method of manufacturing using a 3D printer, or the like. be able to.
  • the sole 5 is attached to the contact area 4s via an adhesive, but the attachment means is not limited to the adhesive, and is attached using a fastener such as a belt. Also good. Furthermore, in the present embodiment, the sole 5 is mounted in direct contact with the contact area 4s, but a cushion material (not shown) or an adhesive may be interposed between the sole 5 and the contact area 4s. .
  • FIG. 12A is a perspective view showing the sole 5 and the pasting margin part before being attached to the grounding part 4.
  • the pattern of the bottom surface 5s is omitted.
  • the toe side pasting margin 6 and the bending portion side pasting margin 7 are integrally coupled to the sole 5.
  • the toe side sticking margin part 6 is coupled along the toe T side edge of the sole 5, has a fan shape, and is divided by two cuts 8a and 8b.
  • the bending portion side attaching margin portion 7 is coupled to the edge of the sole 5 on the bending portion 3 side.
  • FIG. 12B is a diagram for explaining the thickness in the vicinity including the boundary between the toe side pasting margin 6 and the sole 5.
  • FIG. 12C is a view for explaining the thickness in the vicinity including the boundary between the bending portion side pasting margin portion 7 and the sole 5.
  • the toe side pasting allowance 6 has a constant thickness th2 that is thinner than the thickness th1 of the sole 5, and the thickness gradually increases toward the boundary B1 with the sole 5.
  • the bending portion side pasting margin portion 7 extends with a thickness th3 that is thinner than the thickness th1 of the sole 5, and the thickness gradually increases toward the boundary B2 with the sole 5.
  • the sole 5 when the sole 5 is attached to the grounding portion 4, the sole 5 can be attached closely without forming a bend or a gap between the sole 5 and the grounding portion 4.
  • the thickness th1 of the sole 5 is 2.25 to 3.0 mm
  • the thickness th2 of the toe side pasting margin 6 and the thickness th3 of the bending side pasting margin 7 are 1.5 to 2.0 mm. be able to.
  • FIG. 13 is a view showing the bottom surface 5s of the sole 5 divided from a viewpoint different from that in FIG.
  • the bottom surface 5 s of the sole 5 is on the toe T (see FIG. 1) side in the longitudinal direction Z of the sole (the same direction as the longitudinal direction Y of the foot when upright) with the virtual straight line VL as a boundary.
  • a front region P1 and a rear region P2 that is a heel side in the sole front-rear direction Z are provided.
  • a “virtual straight line VL” illustrated in FIG. 13 is a virtual straight line extending in parallel to the sole width direction W (the same direction as the width direction W in FIG. 3) at the center position in the sole longitudinal direction Z.
  • the front region P1 is a region that is more easily worn during the kick-out operation than the rear region P2.
  • the rear region P2 is a region that is more likely to slip during the stepping operation as described with reference to FIGS. 2A to 2D as compared to the front region P1.
  • the present inventor pays attention to the difference in the functions of the front region P1 and the rear region P2, and as a result of intensive studies, the functional regions arranged in the front region P1 and the rear region P2 have a specific area relationship or arrangement. This has led to the finding that the wear resistance and drainage performance of the bottom surface 5s can be improved.
  • the area relationship and arrangement of each functional region will be described in detail.
  • the bottom surface 5s of the sole 5 is provided with a wear-resistant region R1 and a drainage region R2.
  • the wear resistant region R1 is a region having wear resistance performance.
  • the drainage region R2 is a region having drainage performance.
  • the wear resistant region R1 is a region having higher wear resistance performance than other functional regions, and is at least a region having higher wear resistance performance than the drainage region R2.
  • the drainage region R2 is a region having higher drainage performance than the other functional regions, and at least is a region having higher drainage performance than the wear-resistant region R1.
  • the wear resistance performance can be set by, for example, a negative ratio of a pattern made of unevenness formed on the bottom surface 5s.
  • the wear resistance performance of the wear resistance area R1 can be ensured by setting the negative ratio of the wear resistance area R1 to a predetermined value or less. Further, by making the negative ratio of the wear resistant region R1 smaller than the negative ratio of the drainage region R2, the wear resistance performance of the wear resistant region R1 can be made higher than the wear resistance performance of the drainage region R2.
  • the wear resistance performance may be set depending on, for example, the amount of material.
  • the wear resistance performance of the wear resistance area R1 can be ensured by forming the wear resistance area R1 with a material having excellent wear resistance performance.
  • the wear-resistant performance of the wear-resistant region R1 can be made higher than the wear-resistant performance of the drainage region R2. it can.
  • the drainage performance can be set by, for example, a negative ratio of a pattern made of unevenness formed on the bottom surface 5s.
  • the drainage performance of the drainage area R2 can be ensured by setting the negative ratio of the drainage area R2 to a predetermined value or more. Further, by making the negative ratio of the drainage region R2 larger than the negative ratio of the wear resistant region R1, the drainage performance of the drainage region R2 can be made higher than the drainage performance of the wear resistant region R1.
  • the method for forming the wear-resistant region R1 and the drainage region R2 is not limited to the above-described method using the negative ratio of the pattern including the unevenness formed on the bottom surface 5s. However, by setting the negative ratio, it is possible to simultaneously set the wear resistance performance magnitude relationship and the drainage performance magnitude relationship of the wear resistance region R1 and the drainage region R2 to the above desired relationship. It is preferable to set wear resistance performance and drainage performance by utilizing.
  • the area of the wear-resistant region R1 is made larger than the area of the drainage region R2.
  • the area of the drainage region R2 is set to the wear resistant region R1. Make it larger than the area.
  • the drainage performance is improved in the rear region P2 in which the entire weight of the wearer is loaded during the stepping operation. Since it can raise, the slip by the water film interposed between the bottom face 5s and the road surface S (refer FIG. 1) can be suppressed. Thereby, the grip force of the back area
  • the wear resistance can be improved in the front region P1 where the wearer touches the road surface S with the bottom surface 5s and slides, so that early wear of the front region P1 is avoided. Can do. That is, the service life of the sole 5 can be extended.
  • the front region P1 has a plurality of wear-resistant regions R1 occupying a certain area. Therefore, the area of the wear-resistant region R1 in the front region P1 is represented by the total area of the areas of the plurality of wear-resistant regions R1. The same applies to the case where there are a plurality of drainage regions R2 occupying a certain area in the front region P1.
  • the area of the drainage region R2 in the front region P1 is represented by the total area of the areas of the plurality of drainage regions R2.
  • the area of the wear-resistant region R1 in the rear region P2 and the area of the drainage region R2 are also expressed by the same method as the area of the wear-resistant region R1 in the front region P1 and the area of the drainage region R2.
  • FIG. 14 shows an example in which a pattern made of unevenness constituting the wear-resistant region R1 and a pattern made of unevenness constituting the drainage region R2 are arranged in accordance with the arrangement of the functional regions shown in FIG.
  • the pattern corresponding to each functional area it is possible to realize the sole 5 having high anti-slip performance when traveling.
  • the service life of the sole 5 can be extended.
  • FIG. 15 is a diagram showing a pattern of the bottom surface 5s similar to FIG.
  • the region where the straight groove 13 is formed corresponds to the frame “I” of the two-dot chain line in FIG. 15
  • the region where the land portion 12 is formed corresponds to the drainage region R2.
  • the region where the land portions 11 and 14 are formed does not correspond to the wear resistant region R ⁇ b> 1, and the drainage region R ⁇ b> 2. Also not applicable.
  • the region where the land portions 11 and 14 are formed corresponds to a propulsion region R3 having propulsion performance.
  • the area of the wear-resistant area R1 is larger than the area of the drainage area R2. More specifically, there is no drainage region R2 in the front region P1 shown in FIG. That is, the front area P1 shown in FIG. 15 is composed of a wear-resistant area R1 and a propulsion area R3 described later.
  • the area of the drainage region R2 Is larger than the area of the wear-resistant region R1. More specifically, the wear-resistant region R1 does not exist in the rear region P2 shown in FIG. That is, the rear region P2 shown in FIG. 15 includes a drainage region R2 and a propulsion region R3 described later.
  • the wear resistant region R1 is disposed only on the toe T (see FIG. 1) side with respect to the drainage region R2.
  • the front area P1 does not include the drainage area R2, and the rear area P2 does not include the wear-resistant area R1.
  • region R1 is arrange
  • the wear-resistant region R1 is disposed only on the toe T (see FIG. 1) side with respect to the drainage region R2, the drainage performance during the stepping operation and the wear resistance performance during the kicking-out operation, Can be further enhanced.
  • the configuration is not limited to the configuration illustrated in FIG. 15 as long as the wear-resistant region R1 is disposed only on the toe T (see FIG. 1) side with respect to the drainage region R2. It may be a bottom surface in which the front region P1 is configured only by the wear resistant region R1 and the rear region P2 is configured only by the drainage region R2.
  • the wear-resistant region R1 and the drainage region R2 are arranged in the order of the wear-resistant region R1 and the drainage region R2 from the toe T side to the heel side of the front region P1, and the rear region P2 is the wear-resistant region.
  • the bottom surface may include the drainage region R2 without including R1.
  • the front region P1 does not include the drainage region R2 but includes the wear resistant region R1, and the wear resistant region R1 and the drainage region R2 from the toe T side to the heel side of the rear region P2 include the wear resistant region R1.
  • the bottom surface may be disposed in the order of the drainage region R2.
  • the total area of the wear-resistant region R1 on the bottom surface 5s is preferably larger than the total area of the drainage region R2 on the bottom surface 5s.
  • the bottom surface 5s shown in FIG. 15 is provided with a propulsion region R3 having propulsion performance on the heel side (the rear side in the sole longitudinal direction Z) with respect to the drainage region R2.
  • the ground contact area of the bottom surface 5s during traveling moves from the drainage area R2 during the stepping operation to the heel side (see FIGS. 2A to 2B).
  • the ground contact region moves toward the toe T (see FIG. 1) toward the kicking-out operation, and moves to the wear-resistant region R1 in the vicinity of the toe T (see FIGS. 2C to 2D).
  • the portion on the heel side with respect to the drainage region R2 requires a high propulsive force for the second half kicking operation. Therefore, as shown in FIG. 15, the propulsion region R3 is preferably provided at least on the heel side with respect to the drainage region R2.
  • the wear resistance performance, drainage performance, and propulsion performance of the wear resistant region R1, the drainage region R2, and the propulsion region R3 are set by adjusting the negative ratio.
  • the negative ratio increases in the order of the drainage region R2, the propulsion region R3, and the wear-resistant region R1.
  • the total area of the wear-resistant region R1 on the bottom surface 5s is larger than the total area of the drainage region R2 on the bottom surface 5s.
  • the total area of the wear-resistant region R1 on the bottom surface 5s is preferably smaller than the total area of the total area of the drainage region R2 and the total area of the propulsion region R3 on the bottom surface 5s.
  • the total area of the wear-resistant region R1 on the bottom surface 5s is smaller than the total area of the total area of the drainage region R2 and the total area of the propulsion region R3 on the bottom surface 5s.
  • the balance of wear resistance performance, drainage performance, and propulsion performance is achieved by the relationship of “total area of drainage area R2 ⁇ total area of wear resistance area R1 ⁇ total area of drainage area R2 and propulsion area R3”.
  • Can be secured That is, it is possible to suppress any one of the wear resistance performance, drainage performance, and propulsion performance from becoming excessive performance or not satisfying performance.
  • the wear-resistant region R1, the drainage region R2, and the propulsion region R3 are functionally separated based on the negative ratio
  • the sole 5 is increased by increasing the area occupied by the drainage region R2 and the propulsion region R3 having a large negative ratio. It is easy to realize weight reduction (see FIG. 1 and the like).
  • the wear-resistant region R1 includes a first region R1a located on the toe T (see FIG. 1) side and a second region R1b located on the heel side with respect to the first region R1a. I have. More specifically, in the example shown in FIG. 15, a region where the linear groove 13 is formed (see a two-dot chain line “I” in FIG. 15) corresponds to the first region R1a. In the example shown in FIG. 15, the region where the land portion 12 is formed corresponds to the second region R1b.
  • the first region R1a of the wear resistant region R1 has higher wear resistance performance than the second region R1b of the wear resistant region R1.
  • the area where the linear groove 13 is formed has a smaller negative ratio than the area where the land portion 12 is formed. Therefore, the region in which the linear groove 13 is formed has higher wear resistance than the region in which the land portion 12 is formed (see the frame “II” in FIG. 15).
  • the wear resistance performance may be varied depending on the material or the like.
  • the second region R1b of the wear resistant region R1 has higher propulsive performance than the first region R1a of the wear resistant region R1.
  • the region where the land portion 12 is formed has a larger edge component than the region where the linear groove 13 is formed. Therefore, the propulsion performance is higher in the region where the land portion 12 is formed than in the region where the linear groove 13 is formed.
  • the area of the first region R1a of the wear resistant region R1 is preferably smaller than the area of the second region R1b of the wear resistant region R1. In this way, it is possible to further improve the propulsion performance up to the final stage of the kicking-out operation in the wear resistant region R1.
  • the ratio of the area of the first region R1a to the area of the second region R1b is preferably 0.25 to 0.8, more preferably 0.33 to 0.5, and 0.45. Is particularly preferred.
  • the ratio of the area of the second region R1b of the wear-resistant region R1 to the area of the drainage region R2 adjacent to the heel side of the second region R1b of the wear-resistant region R1 is set to 0.6 to 1.5. Preferably, it is 0.8 to 1.2, more preferably 1.1.
  • the ratio of the area of the propulsion region R3 located on the heel side of the drainage region R2 of the rear region P2 to the total area of the bottom surface 5s is preferably 0.25 to 0.6, preferably 0.35 to 0 .5 is more preferable, and 0.42 is particularly preferable.
  • fluorine is applied to the groove wall and the groove bottom constituting the width direction groove that define the width direction land portion.
  • 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 has a uniform sole pattern on the bottom surface.
  • the comparative example 2 has a pattern different from the present invention.
  • the index of Q1-1 in Comparative Example 1 is set to 100, and the larger the index, the more excellent the drainage performance and wear resistance performance.
  • 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, and the anti-slip performance and the anti-wear performance are evaluated.
  • Comparative Example 1 and Inventive Example 4 the drainage performance and wear resistance performance of each portion of each region Q1, Q2 were evaluated from the results calculated by simulation. Also in Comparative Example 2 and Invention Examples 1 to 3, the drainage performance and wear resistance performance of each part of each region Q1, Q2 are evaluated by the same method as Comparative Example 1 and Invention Example 4.
  • [Anti-slip performance] The following test is performed in a state where a 1 mm water film is applied to the glass surface and a load of 980 N is applied to the prosthetic leg for competition. Attach the spring only to the connection part between the prosthetic leg for competition and the stump of the foot, pull the prosthetic leg for competition to the toe side in the front-rear direction of the foot with only the spring, Index. In addition, when the index of Comparative Example 1 is set to 100, the larger the index, the better the anti-slip performance. [Abrasion resistance] A player with healthy feet on the left side wears a prosthetic leg for competition on the right side, and the overall appearance of the bottom surface after running 200 km on public roads is indexed.
  • the index of the comparative example 1 is set to 100, and it shows that a sole is excellent in abrasion resistance performance, so that a numerical value is large.
  • a player with healthy legs on the left side wears a prosthetic leg for competition on the right side, and the appearance of the entire bottom surface after running 200 km on a public road is indexed.
  • Comparative Example 2 and Inventive Examples 1 to 3 the appearance of the entire bottom surface is indexed by the same method as Comparative Example 1 and Inventive Example 4.

Landscapes

  • 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 pied artificiel de sport est montée sur une région de contact avec le sol du pied artificiel de sport, la surface inférieure étant pourvue d'une région résistante à l'abrasion ayant une performance de résistance à l'abrasion et d'une région de drainage ayant une performance de drainage. Lorsqu'une ligne droite virtuelle qui s'étend parallèlement au sens de la largeur de la semelle est définie au niveau de la position centrale dans la direction longitudinale de la semelle, la zone de la région résistante à l'abrasion est plus grande que celle de la région de drainage dans la région avant de la surface inférieure qui devient le côté orteils avec la ligne droite virtuelle en tant que limite, et la zone de la région de drainage est plus grande que la région résistante à l'abrasion dans la région arrière de la surface inférieure qui devient le côté talon avec la ligne droite virtuelle en tant que limite.
PCT/JP2019/016536 2018-04-17 2019-04-17 Semelle pour pied artificiel de sport WO2019203282A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160045337A1 (en) * 2014-08-13 2016-02-18 Altair Engineering, Inc. Base plate and blade design for a leg prosthetic
JP2016150189A (ja) * 2015-02-19 2016-08-22 美津濃株式会社 義足用ソールシステム
US20170281371A1 (en) * 2016-03-31 2017-10-05 Nike, Inc. Prosthetic Blade Attachment System
US20170281372A1 (en) * 2016-04-04 2017-10-05 Fillauer Composites Llc Apparatus and method for a split toe blade

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8535390B1 (en) 2011-09-16 2013-09-17 össur hf Traction device and associated attachment device for a prosthetic running foot

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160045337A1 (en) * 2014-08-13 2016-02-18 Altair Engineering, Inc. Base plate and blade design for a leg prosthetic
JP2016150189A (ja) * 2015-02-19 2016-08-22 美津濃株式会社 義足用ソールシステム
US20170281371A1 (en) * 2016-03-31 2017-10-05 Nike, Inc. Prosthetic Blade Attachment System
US20170281372A1 (en) * 2016-04-04 2017-10-05 Fillauer Composites Llc Apparatus and method for a split toe blade

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