WO2020022275A1 - Sole for athletic prosthetic leg - Google Patents

Sole for athletic prosthetic leg Download PDF

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Publication number
WO2020022275A1
WO2020022275A1 PCT/JP2019/028687 JP2019028687W WO2020022275A1 WO 2020022275 A1 WO2020022275 A1 WO 2020022275A1 JP 2019028687 W JP2019028687 W JP 2019028687W WO 2020022275 A1 WO2020022275 A1 WO 2020022275A1
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WIPO (PCT)
Prior art keywords
blocks
sole
illustrated example
row
width direction
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PCT/JP2019/028687
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French (fr)
Japanese (ja)
Inventor
大太 糸井
耕平 佐橋
Original Assignee
株式会社ブリヂストン
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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 JP2020532386A priority Critical patent/JPWO2020022275A1/en
Publication of WO2020022275A1 publication Critical patent/WO2020022275A1/en

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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 for a sports prosthesis, which is attached to an area where a sports prosthesis is in contact.
  • a sole that comes into contact with a road surface is attached to a lower surface of a contact area of a prosthetic leg for competition (hereinafter, also referred to as a prosthetic leg or simply a prosthetic leg).
  • Patent Literature 1 proposes various soles that are attached to the lower surface of a curved leaf spring-shaped prosthetic limb according to a sport type. Specifically, Patent Literature 1 describes a sole in which a spike is attached to a bottom surface of a sole that contacts a road surface.
  • Patent Literature 1 did not have sufficient wear resistance.
  • an object of the present invention is to provide a sole for a sports prosthesis with improved abrasion resistance.
  • the gist configuration of the present invention is as follows.
  • the athletic prosthetic sole of the present invention has at least a part of the bottom surface, a plurality of blocks that are defined by grooves and have a polygonal shape of a hexagon or more,
  • the shortest distance between two blocks adjacent in the first direction among the plurality of blocks is d1
  • the maximum length of the longer one of the two adjacent blocks is the maximum length.
  • Is L the relational expression: d1 / L ⁇ 0.06 Is satisfied.
  • the “maximum length of the block” refers to the maximum length when a distance between any two points on the outline of the block is measured in plan view.
  • the athletic prosthetic sole according to an embodiment of the present invention is not particularly limited, but has, for example, a top surface and a bottom surface having a thickness of 1.0 to 10.0 mm (preferably 2.0 to 3.5 mm). It has a sheet-like shape.
  • the sole of this embodiment has the top surface attached to the contact area of the artificial prosthesis, while the bottom surface is in contact with the road surface.
  • the type of athletic prosthesis to be worn is not particularly limited, and can be worn to any known type. The attachment can be performed by, for example, bonding with an adhesive or the like. An example of the prosthetic leg will be described later.
  • the material and the like of the sole are not particularly limited, and a commonly used rubber or the like can be used.
  • FIG. 1 is a developed view showing a pattern of a bottom surface 10 of a sole for a sports prosthesis according to an embodiment of the present invention.
  • FIG. 1 shows a part of the bottom surface 10 of the sole.
  • the sole according to the present embodiment includes a plurality of blocks that are defined by grooves 11 in at least a part of the bottom surface 10 (all regions in the illustrated example) and have a polygonal shape having a hexagonal shape or more in plan view. 12.
  • a pattern for example, as shown in FIG. 1 is formed on the entire bottom surface 10.
  • the sole for sports prosthesis of the present embodiment is attached to the artificial prosthesis via the intermediate layer (cushion), it is preferable that the thickness and material of the intermediate layer (cushion) be uniform.
  • all the blocks 12 have a polygonal shape with a planar shape of hexagon or more.
  • some of the blocks 12 may have a polygonal shape having a hexagonal shape or more.
  • the block 12 in a part of the region in the front-rear direction (the direction from the toe side to the heel side) of the sole may have a polygonal shape of a hexagon or more in plan view, and / or
  • the block 12 in a part of the region in the width direction (the direction orthogonal to the front-rear direction in plan view) may have a polygonal shape with a planar shape of hexagon or more.
  • some of the blocks 12 may have a planar shape of a heptagon, a octagon, or a polygon having more vertices. Accordingly, in some other regions of the bottom surface 10 of the sole, the block 12 may have a polygonal shape having a pentagonal shape or less, or may have a planar shape other than the polygonal shape.
  • the plurality of blocks 12 each having a polygonal shape having a hexagonal shape or more in a planar shape include two blocks 12 adjacent to each other in a first direction and having a second shape different from the first direction. Also in the direction, the two blocks 12 are adjacent to each other. That is, the plurality of blocks 12 form a row in a direction (first direction) inclined with respect to the front-rear direction of the sole, and the row forms a plurality of rows (10 rows in the drawing) in the second direction. ing. Two blocks adjacent in the first direction each have a first side wall 12c (a polygonal side in plan view) extending substantially parallel to each other.
  • a part (particularly, one side in the front-rear direction (toe side in the illustrated example)) of the first side wall 12c is a side wall having a maximum length of each of two blocks adjacent in the first direction. It is. Therefore, in this example, the plurality of blocks 12 have at least one row (10 rows in the drawing) arranged in a direction substantially orthogonal to the direction in which the first side wall 12c extends. In other words, in the row, the plurality of blocks 12 are arranged in a direction substantially perpendicular to the extending direction of the first side wall 12c having the maximum length of the block 12.
  • the extending direction of the first side wall 12c having the maximum length of each block 12 is not particularly limited, and may be, for example, a direction inclined by 0 ° to 45 ° with respect to the longitudinal direction of the sole. Further, in the embodiment shown in FIG. 1, the above-mentioned row has a plurality of rows (10 rows in the drawing), and two (a large number of) blocks 12 adjacent to each other between rows adjacent in the second direction are substantially parallel to each other. , Each having a second side wall 12d different from the first side wall 12c.
  • a step-like (that is, having a portion having a different height) block 12 b is provided on a part of the bottom surface 10. That is, in the embodiment shown in FIG. 1, the block 12 formed on the bottom surface 10 of the sole is composed of a block 12a having a substantially constant height and a step-shaped block 12b.
  • all the blocks 12 are constituted by blocks 12a having a substantially constant height.
  • all the blocks 12 are configured by step-like blocks 12b.
  • the block height (depth of the groove 11) h1 (mm) of the block 12a having a substantially constant height is not particularly limited, but is preferably 1.0 to 7.0 mm, and is preferably 2.0 to 7.0 mm. It is more preferably 3.5 mm, and even more preferably 2.4 mm to 3.5 mm.
  • the height of the entire block of the stepped block 12b is h1 (mm) and the height of the highest step having the top of the block 12b is h2 (mm), for example, as shown in FIG.
  • h1 is 1.0 to 7.0 mm
  • h2 is 0.5 to 2.5 mm
  • h1 is 2.0 to 3.5 mm
  • h2 is 0.
  • it is set to be 0.7 to 1.5 mm
  • h1 is set to 2.4 mm to 3.5 mm
  • h2 is set to 1.2 mm to 1.5 mm.
  • the height of the block at the highest step is h2
  • h1 is 1.0 to 7.0 mm
  • h2 is 0.
  • h1 is 2.0 to 3.5 mm
  • h2 is more preferably 0.7 to 1.5 mm
  • h1 is 2.4 to 3.5 mm
  • h2 is 1 to 2.5 mm. More preferably, the thickness is set to 0.2 mm to 1.5 mm.
  • the step-like block 12b has two steps, and the planar shape of the entire block 12b is a polygonal shape of a hexagon or more as described above, but the planar shape of the highest step is a plan view.
  • portions 12e six portions in the illustrated example
  • the interval (for example, the shortest distance) between two adjacent blocks 12 increases from one side in the width direction (outside in the width direction in the illustrated example) to the other side in the width direction (inside in the width direction in the illustrated example). It has a place.
  • a portion where the interval (for example, the shortest distance) between two adjacent blocks 12 is small is also included, but in each row, from one side in the width direction (outside in the width direction in the illustrated example) in the width direction.
  • the interval (for example, the shortest distance) between two adjacent blocks may gradually increase toward the other side (in the illustrated example, in the width direction).
  • the interval (for example, the shortest distance) between two adjacent blocks 12 on one side in the width direction (the outer side in the width direction in the illustrated example) is two adjacent blocks on the other side in the width direction (the inner side in the width direction in the illustrated example). Twelve intervals (for example, the shortest distance) may be used. Further, each row has a portion where the area of the block 12 in plan view decreases from one side in the width direction (outside in the width direction in the illustrated example) to (inside in the width direction in the illustrated example).
  • the area of the block 12 in plan view increases from one side in the width direction (outside in the width direction in the illustrated example) to the other side in the width direction (inside in the width direction in the illustrated example).
  • the area of the block 12 in plan view may gradually decrease from one side in the width direction (outside in the width direction in the illustrated example) to the other side in the width direction (inside in the width direction in the illustrated example).
  • the area in plan view of the block 12 on one side in the width direction (outside in the width direction in the illustrated example) is larger than the area in plan view on the block 12 on the other side in the width direction (inside in the width direction in the example shown). You may make it.
  • the ratio (negative rate) of the area of the groove 11 to the area of the sole in a plan view is from one side in the width direction (outside in the width direction in the illustrated example) to the other side in the width direction (inside in the width direction in the illustrated example). And it is increasing gradually.
  • the step-like blocks 12b are arranged from one side in the width direction (outside in the width direction in the illustrated example) to the other side in the width direction (inside in the width direction in the example). There is a portion where the ratio of the area of the highest step in plan view to the area in plan view is small. Specifically, there is a portion where the width of the protruding portion 12e becomes smaller from one side in the width direction (outside in the width direction in the illustrated example) to the other side in the width direction (inside in the width direction in the illustrated example).
  • the ratio (or the width of the protruding portion 12e) may be gradually reduced.
  • the ratio (or the width of the protruding portion 12e) in the block 12 on the one side in the width direction (the outer side in the width direction in the illustrated example) is the block 12 on the other side in the width direction (the inner side in the width direction in the illustrated example).
  • one side in the width direction is set to the outside in the width direction.
  • one side in the width direction may be set to the inside in the width direction.
  • the interval between the rows (the groove width of the groove 11 that partitions them (for example, The maximum value of the groove width) is increasing gradually. Therefore, in plan view, the ratio of the area of the groove 11 to the area of the sole (negative rate) is from one side (toe side in the illustrated example) of the sole in the front-rear direction to the other side (heel side in the illustrated example). It gradually increases toward the row.
  • the area of the block 12 in a plan view (for example, the average value in the row) from the row on the one side (toe side in the illustrated example) to the row on the other side (heel side in the illustrated example) of the sole in the front-rear direction. Is gradually decreasing.
  • the width direction from the row on one side (toe side in the illustrated example) of the sole in the front-rear direction toward the row on the other side (heel side in the illustrated example) in the width direction is gradually decreasing.
  • the sole projects from the row on one side (toe side in the illustrated example) in the front-rear direction toward the row on the other side (heel side in the illustrated example).
  • the width of the portion 12e (for example, the average value in the column) is substantially gradually reduced.
  • the groove 11 is formed by connecting a plurality of grooves extending in a zigzag shape in the front-rear direction of the sole by a plurality of grooves extending substantially in the width direction. From another point of view, the groove 11 is formed by connecting a plurality of grooves extending in a substantially zigzag manner in a first direction by a plurality of grooves extending in a substantially second direction. From a different viewpoint, the groove 11 is formed by connecting a plurality of grooves extending in a zigzag manner in a substantially second direction by a plurality of grooves extending in a substantially first direction.
  • the first direction in this example, the direction substantially orthogonal to the direction in which the first side wall 12c having the maximum length extends
  • d1 / L ⁇ 0.06 Meets in a row positioned in a partial area on one side (toe side in the illustrated example) of the sole in the front-rear direction, a part or all of the blocks 12 in the row are represented by the above relational expression. d1 / L ⁇ 0.06 Meets.
  • the shortest distance d1 is preferably 2 mm or less, more preferably 1.5 mm or less, and even more preferably 1.0 mm or less, from the viewpoint of improving wear resistance.
  • the shortest distance d1 is preferably at least 0.2 mm, more preferably at least 0.5 mm, even more preferably at least 0.7 mm, from the viewpoint of ensuring drainage.
  • the shortest distance between the second side walls 12d is d2 (mm)
  • the shortest distance d2 (mm) is one side in the front-rear direction (toe side in the illustrated example) of the plurality of rows.
  • the bottom surface 10 has a plurality of blocks 12 which are partitioned by the grooves 11 and have a polygonal shape having a hexagonal shape or more. Since the relational expression, d1 / L ⁇ 0.06, is satisfied, the shortest distance d1 between the blocks 12 adjacent in the first direction is shorter than the size (and, therefore, rigidity) of the blocks 12. Therefore, when the blocks 12 flex and bulge at the time of touching the ground, the adjacent blocks 12 can support each other, and the sliding of the blocks 12 can be suppressed, and the wear resistance can be improved.
  • two blocks 12 adjacent in the first direction each have a first side wall 12c extending substantially parallel to each other, and the plurality of blocks 12 are formed by extending the first side wall 12c. Since there is at least one row (ten rows in the drawing) arranged in a direction substantially perpendicular to the existing direction, the shortest distance d1 is constant over the entire portion extending substantially in parallel. The above-mentioned supporting effect can be obtained effectively.
  • the first side wall 12c is the side wall having the maximum length of each of the two blocks 12 adjacent in the first direction. The effect of supporting each other can be obtained effectively.
  • a plurality of rows (10 rows in the drawing) are provided, and two blocks 12 adjacent to each other between rows adjacent in the second direction extend in a second Since each of the side walls 12d is provided, an effect of supporting the blocks 12 adjacent to each other in the front-rear direction of the sole can be obtained.
  • the first direction is a direction inclined with respect to the front-back direction of the sole. Can support each other in the moving direction, and the above effect can be obtained more effectively. As described above, according to the sole for athletic artificial leg of the present embodiment, the wear resistance can be improved.
  • the ratio (negative rate) of the area of the groove 11 to the area of the sole in a plan view is from one side (toe side in the illustrated example) of the sole in the front-rear direction and the other side (toe side).
  • the heel side in the illustrated example is gradually increased toward the row, so that the effect of supporting the blocks 12 against each other on the toe side where the wear is relatively large is obtained, but the heel side where the wear is relatively small. As a result, drainage can be ensured, so that both abrasion resistance and drainage can be achieved at a high level.
  • the area of the block 12 in plan view (from the row on one side (toe side in the illustrated example) to the row on the other side (heel side in the illustrated example) in the front-rear direction of the sole is shown. (E.g., the average value in the row) is gradually reduced, so that the effect that the blocks 12 support each other on the toe side where the wear is relatively large is effectively obtained, but the drainage property is improved on the heel side where the wear is relatively small. Since it can be ensured, it is possible to achieve both abrasion resistance and drainage at a high level.
  • each row having a plurality of stepped blocks 12b the row from one side (toe side in the illustrated example) of the sole in the front-rear direction to the other side (heel side in the illustrated example).
  • the other step in the width direction is the highest step relative to the area in plan view of the stepped block 12b. Since the ratio of the area in plan view (for example, the average value in the row) is substantially gradually reduced, the effect that the blocks 12 support each other on the toe side where the wear is relatively large is obtained, but the wear is relatively small. Since the drainage property can be ensured on the heel side where the wear is small, both the wear resistance and the drainage property can be achieved at a high level.
  • each row having a plurality of stepped blocks 12b the row from one side (toe side in the illustrated example) of the sole in the front-rear direction to the other side (heel side in the illustrated example). Since the width (for example, the average value in the row) of the protruding portion 12e is gradually reduced toward the row, the effect that the blocks 12 support each other on the toe side where the wear is relatively large can be effectively obtained. Since the drainage property can be ensured on the heel side where the wear is relatively small, both the wear resistance and the drainage property can be achieved at a high level.
  • the stepped block 12b is provided in a part of the bottom surface 10, so that a high step is crushed at the time of contact with the ground, and the contact property is improved. The performance is also improved. Furthermore, since the planar shape of the highest step has a portion radially protruding from the center in plan view, it is possible to further enhance drainage and improve the drivability by increasing the edge component. Can also.
  • FIG. 2 is a developed view showing a pattern on a bottom surface of a sole for a sports prosthesis according to another embodiment of the present invention.
  • the sole of the present embodiment has a plurality of blocks 12 that are defined by grooves 11 and have a polygonal shape of a hexagon or more in at least a part of the area of the bottom surface 10. .
  • all the blocks 12 have a polygonal shape having a hexagonal shape or more (in this embodiment, a hexagonal shape).
  • the plurality of blocks 12 having a hexagonal planar shape include two blocks 12 adjacent to each other in a first direction (in this example, a width direction) and a second direction (in this example).
  • first direction in this example, a width direction
  • second direction in this example
  • the two blocks 12 are adjacent to each other. That is, the blocks 12 form rows in a direction (first direction) inclined (90 ° in this example) with respect to the front-rear direction of the sole, and the rows form a plurality of rows in the second direction.
  • Two blocks adjacent in the first direction each have a first side wall 12c extending substantially parallel to each other.
  • the plurality of blocks 12 have at least one row (10 rows in the drawing) formed in a direction inclined with respect to the direction in which the first side wall 12c extends.
  • the plurality of blocks 12 are arranged in a direction inclined with respect to the extending direction of the first side wall 12c of the block 12.
  • the above-mentioned rows have a plurality of rows (10 rows in the drawing), and two blocks 12 adjacent to each other between rows adjacent in the second direction extend substantially parallel to each other.
  • the block 12 formed on the bottom surface 10 of the sole is composed of only the block 12a having a substantially constant height.
  • the block height (depth of the groove 11) of the block 12a having a substantially constant height is not particularly limited, but may be, for example, 1.0 to 7.0 mm.
  • the interval between two adjacent blocks 12 (for example, the shortest distance d1) is constant in each column. In some rows, the area of the block 12 in a plan view is constant.
  • the groove width (for example, the maximum value of the groove width) increases substantially gradually. Therefore, in plan view, the ratio of the area of the groove 11 to the area of the sole (negative rate) is determined from the row on one side (toe side in the illustrated example) and the other side (heel side in the illustrated example) in the front-rear direction of the sole. It gradually increases toward the center in the front-rear direction.
  • the area of the block 12 in a plan view (for example, in rows) from one side (toe side in the illustrated example) and the other side (heel side in the illustrated example) of the sole in the front-rear direction toward the center in the front-rear direction. Average value) is decreasing gradually.
  • the shortest distance between two blocks 12 adjacent in the first direction (in this example, the width direction) among the plurality of blocks 12 in plan view is d1
  • the maximum length of the larger one of the two adjacent blocks 12 is L
  • the relational expression: d1 / L ⁇ 0.06 Meets in a row located in a partial area on one side (toe side in the illustrated example) of the sole in the front-rear direction, a part or all of the blocks 12 in the row are determined by the above relational expression. d1 / L ⁇ 0.06 Meets.
  • the shortest distance d1 is preferably 2 mm or less, more preferably 1.5 mm or less, and still more preferably 1.0 mm or less, from the viewpoint of improving wear resistance.
  • the shortest distance d1 is preferably at least 0.2 mm, more preferably at least 0.5 mm, even more preferably at least 0.7 mm, from the viewpoint of ensuring drainage.
  • the shortest distance between the second side walls is d2 (mm)
  • the shortest distance d2 (mm) is one of a plurality of rows in the front-rear direction (toe side in the illustrated example) and It gradually increases from the row on the other side (heel side in the illustrated example) toward the center in the front-rear direction.
  • the sole in at least a part of the area of the bottom surface 10, the sole has a plurality of blocks 12 which are defined by grooves 11 and have a polygonal shape of a hexagon or more. Since the relational expression, d1 / L ⁇ 0.06, is satisfied, the shortest distance d1 between the blocks 12 adjacent in the first direction is shorter than the size (and, therefore, rigidity) of the blocks 12. Therefore, when the blocks 12 flex and bulge at the time of touching the ground, the adjacent blocks 12 can support each other, and the sliding of the blocks 12 can be suppressed, and the wear resistance can be improved.
  • the two blocks 12 adjacent in the first direction each have a first side wall 12c extending substantially in parallel with each other, and the plurality of blocks are formed by extending the first side wall 12c. Since at least one row (ten rows in the drawing) is arranged in a direction substantially orthogonal to the direction in which the direction is changed, the shortest distance d1 is constant over the entire portion extending substantially in parallel. The effect of supporting each other can be obtained effectively. And especially in this embodiment, since the said 1st side wall 12c has the part which is the side wall which has the maximum length of each of the two blocks 12 adjacent in the 1st direction, the said part WHEREIN: The above-described supporting effect can be effectively obtained over the entire maximum length.
  • a plurality of rows (10 rows in the drawing) are provided, and two blocks 12 adjacent to each other between rows adjacent in the second direction extend in a second Since each of the side walls 12d is provided, an effect of supporting the blocks 12 adjacent to each other in the front-rear direction of the sole can be obtained.
  • the first direction is a direction (width direction) inclined with respect to the front-back direction of the sole, not only the force in the front-back direction but also the force in the width direction is greatly applied at the time of touchdown.
  • the blocks 12 can be supported in the moving direction, and the above-described effects can be obtained more effectively.
  • the wear resistance can be improved.
  • the spacing between the rows (from the row on one side (toe side in the illustrated example) and the other side (heel side in the illustrated example) of the sole in the front-rear direction toward the center in the front-rear direction is shown.
  • the groove width (for example, the maximum value of the groove width) of the groove 11 defining the groove is substantially gradually increased, the wear resistance of the toe side where the wear is relatively large and the heel side where the wear is large in some cases is improved, and the comparison is made.
  • the drainage property can be improved at the central portion in the front-rear direction where the abrasion is small, and the abrasion resistance and the drainage property can be compatible at a high level.
  • the ratio of the area of the groove 11 to the area of the sole (negative ratio) in plan view is one side (toe side in the illustrated example) and the other side (FIG.
  • the wear resistance on the toe side where the wear is relatively large and in some cases the heel side where the wear is large is improved,
  • the drainage property can be improved at the central portion in the front-rear direction where the abrasion is small, and the abrasion resistance and the drainage property can be compatible at a high level.
  • the block 12 is viewed in plan from the row on one side (toe side in the illustrated example) and the row on the heel side (in the illustrated example) of the sole in the front-rear direction.
  • the area e.g., the average value in a row
  • the drainage property can be improved in the part, and both the wear resistance and the drainage property can be achieved at a high level.
  • the embodiment shown in FIG. 2 is particularly advantageous in the case of an athletic event, an athlete, and the like in which wear is large not only on the toe but also on the heel side.
  • two blocks 12 adjacent in the first direction each have a first side wall 12c extending substantially parallel to each other, and a plurality of blocks 12 are provided.
  • at least one row of the rows 12 is arranged in a direction substantially perpendicular to the direction in which the first side wall 12c extends. This is because the wear resistance can be further improved.
  • At least one row has a portion where the shortest distance d1 (mm) increases from one side in the width direction to the other side. This is because both abrasion resistance and drainage can be achieved at a high level.
  • the first side wall 12c is preferably the side wall having the maximum length of each of the two blocks 12 adjacent in the first direction. This is because the wear resistance can be further improved.
  • two blocks 12 having a plurality of columns and adjacent between columns adjacent in a second direction different from the first direction are connected to each other. It is preferable to have a second side wall 12d different from the first side wall 12c and extending substantially in parallel. This is because the wear resistance can be further improved.
  • the shortest distance between the second side walls is d2 (mm)
  • the shortest distance d2 (mm) is one of the plurality of rows in the front-rear direction. It is preferable to have a portion that increases from the row to the other row. This is because the abrasion resistance and the drainage property can be compatible at a higher level.
  • a stepped block 12 b is provided on a part of the bottom surface 10. This is because both abrasion resistance and drainage can be achieved at a higher level.
  • At least a part of the block 12 has a portion where the width in the width direction increases from both ends in the front-rear direction of the block 12 toward the center. Is preferred. This is because the rigidity of the block 12 can be increased to further improve the wear resistance.
  • fluorine is applied to the groove wall and the groove bottom of the groove. This is because the drainage performance on the bottom surface 10 of the sole can be improved by applying fluorine to the groove wall and the groove bottom of the groove.
  • FIG. 3 is a schematic side view showing an example of a sports prosthesis with a sole attached.
  • the athletic prosthesis 1 has a leaf spring-shaped foot 2 in this example, and a sole 3 is attached to a contact area on the tip side thereof.
  • the base end of the foot 2 is connected to a socket via an adapter, and the wearer wears a prosthesis by accommodating a stump of the wearer's foot in the socket. be able to.
  • the adapter and the socket those according to the stump position of the foot, such as a thigh prosthesis and a lower leg prosthesis, are used.
  • connection side the side where the foot 2 is connected to the adapter
  • ground side the side which contacts the road surface S
  • toe T of the prosthetic leg 1 refers to the earliest position where the foot 2 extends from the connection side and ends.
  • the foot portion 2 of the prosthetic foot 1 has a straight portion 2a, a curved portion 2b convex to the toe T side, a curved portion 2c convex rearward in the fore-aft direction, and a ground contact in order from the connection side to the ground side. It has a curved portion 2d concave on the side and a grounding portion 2e extending toward the toe T in an arc shape convex on the grounding side.
  • the foot 2 of the athletic prosthesis 1 has a shape extending in a plate shape to the toe T side via at least one (one in the illustrated example) curved portion 2c.
  • the material of the foot 2 is not particularly limited, but it is preferable to use carbon fiber reinforced plastic or the like from the viewpoint of strength and weight reduction.
  • the ground contact portion 2e has a contact area 2f extending in an arc from the toe T to the curved section 2d side on the ground contact side, and the sole 3 is mounted on the contact area 2f.
  • the contact area 2f indicates the entire area that comes into contact with the road surface S when the wearer wearing the artificial prosthesis 1 performs a straight running operation, and in the state where the sole 3 is attached, the contact area 2f Abuts on the road surface S via
  • the sole 3 has a shape that follows the extending shape of the contact area 2f.
  • the ground side of the sole 3 is the bottom surface 10.
  • the bottom surface 10 has a shape in which the arcs X1 and X2 are continuous from the toe T side to the curved portion 2d side.
  • the arcs X1 and X2 have different radii of curvature, but may have the same radius of curvature.
  • the bottom surface 10 has one side and the other bounded by a line extending in the width direction W through a point C, which is a point of contact with the road surface S in a side view when the wearer's prosthetic leg 1 is mounted and the wearer stands upright.
  • the point C is a point that first comes into contact with the road surface S when the vehicle stands upright. That is, the upright state means that the wearer of the prosthesis 1 is a healthy foot that does not wear a prosthesis when only one is a prosthesis, and the body is supported by one prosthesis when both are prostheses. 1 indicates a state where the vehicle 1 first comes down on the road surface S and comes into contact with the road surface S first.

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Abstract

A sole for an athletic prosthetic leg of the present invention has a plurality of blocks on at least a portion of the bottom surface thereof, wherein the blocks are divided by grooves, and the planar shapes of the blocks are hexagons or higher-order polygons. The sole satisfies the relational equation d1/L≤0.06, where d1 is the shortest distance between two blocks adjacent to each other in a first direction among the plurality of blocks, and L is the maximum length of the block having the greater maximum length among the two adjacent blocks.

Description

競技義足用ソールCompetitive prosthetic sole
　本発明は、競技用の義足の接地域に装着される、競技義足用ソールに関するものである。 The present invention relates to a sole for a sports prosthesis, which is attached to an area where a sports prosthesis is in contact.
　従来、競技用の義足（以下、競技義足又は単に義足ともいう）の接地域の下面に、路面と当接するソールを取付けることが行われている。 Conventionally, a sole that comes into contact with a road surface is attached to a lower surface of a contact area of a prosthetic leg for competition (hereinafter, also referred to as a prosthetic leg or simply a prosthetic leg).
　例えば、特許文献１では、湾曲した板ばね状の競技義足の下面に取り付けられた、競技種目に応じた様々なソールが提案されている。具体的には、特許文献１には、路面に接地するソールの底面にスパイクが取り付けられたもの等が記載されている。 For example, Patent Literature 1 proposes various soles that are attached to the lower surface of a curved leaf spring-shaped prosthetic limb according to a sport type. Specifically, Patent Literature 1 describes a sole in which a spike is attached to a bottom surface of a sole that contacts a road surface.
特開２０１６－１５０１８９号公報JP 2016-150189 A
　しかしながら、特許文献１に記載のソールでは、耐摩耗性が十分ではなかった。 ソ ー ル However, the sole described in Patent Literature 1 did not have sufficient wear resistance.
　そこで、本発明は、耐摩耗性を向上させた競技義足用ソールを提供することを目的とする。 Therefore, an object of the present invention is to provide a sole for a sports prosthesis with improved abrasion resistance.
　本発明の要旨構成は、以下の通りである。
　本発明の競技義足用ソールは、底面の少なくとも一部の領域に、溝により区画され、平面形状が六角形以上の多角形状である複数のブロックを有し、
　平面視において、前記複数のブロックのうち、第１の方向に隣接する２つのブロック間の最短距離をｄ１とし、前記隣接する２つブロックのうち最大長さが大きい方の前記ブロックの最大長さをＬとするとき、関係式、
ｄ１／Ｌ≦０．０６
を満たすことを特徴とする。
　ここで、「ブロックの最大長さ」は、平面視において、ブロックの輪郭線上の任意の２点間距離を測定した際に最大となる長さをいうものとする。 The gist configuration of the present invention is as follows.
The athletic prosthetic sole of the present invention has at least a part of the bottom surface, a plurality of blocks that are defined by grooves and have a polygonal shape of a hexagon or more,
In plan view, the shortest distance between two blocks adjacent in the first direction among the plurality of blocks is d1, and the maximum length of the longer one of the two adjacent blocks is the maximum length. Is L, the relational expression:
d1 / L ≦ 0.06
Is satisfied.
Here, the “maximum length of the block” refers to the maximum length when a distance between any two points on the outline of the block is measured in plan view.
　本発明によれば、耐摩耗性を向上させた、競技義足用ソールを提供することができる。 According to the present invention, it is possible to provide a sports prosthetic sole with improved wear resistance.
本発明の一実施形態にかかる競技義足用ソールの底面のパターンを示す展開図である。It is a development view showing the pattern of the bottom of the sole for sports prostheses according to one embodiment of the present invention. 本発明の他の実施形態にかかる競技義足用ソールの底面のパターンを示す展開図である。It is a development view showing the pattern of the bottom of the sole for sports prostheses according to another embodiment of the present invention. ソールが装着された状態の競技義足の一例を示す概略側面図である。It is a schematic side view which shows an example of the athletic prosthesis with the sole attached. ブロックの高さについて説明するための図である。It is a figure for explaining height of a block. ブロックの高さについて説明するための図である。It is a figure for explaining height of a block.
　以下、本発明の実施形態について、図面を参照して詳細に例示説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
＜競技義足用ソール＞
　本発明の一実施形態にかかる競技義足用ソールは、特には限定されないが、例えば厚さ１．０～１０．０ｍｍ（好ましくは、２．０～３．５ｍｍ）の、頂面及び底面を有するシート状の形状である。本実施形態のソールは、頂面が競技義足の接地域に装着され、一方で、底面が路面と接地する。本発明では、装着される競技義足の種類等は、特に限定されず、任意の既知のタイプのものに装着することができる。装着は、例えば接着剤等による接着で行うことができる。なお、競技義足の例については後述する。ソールの材質等は特に限定されず、通常用いるゴム等を用いることができる。 <Sole for prosthetic leg>
The athletic prosthetic sole according to an embodiment of the present invention is not particularly limited, but has, for example, a top surface and a bottom surface having a thickness of 1.0 to 10.0 mm (preferably 2.0 to 3.5 mm). It has a sheet-like shape. The sole of this embodiment has the top surface attached to the contact area of the artificial prosthesis, while the bottom surface is in contact with the road surface. In the present invention, the type of athletic prosthesis to be worn is not particularly limited, and can be worn to any known type. The attachment can be performed by, for example, bonding with an adhesive or the like. An example of the prosthetic leg will be described later. The material and the like of the sole are not particularly limited, and a commonly used rubber or the like can be used.
　図１は、本発明の一実施形態にかかる競技義足用ソールの底面１０のパターンを示す展開図である。図１は、ソールの底面１０の一部を示している。図１に示すように、本実施形態のソールは、底面１０の少なくとも一部の領域（図示例では全域）に、溝１１により区画され、平面形状が六角形以上の多角形状である複数のブロック１２を有している。本実施形態の競技義足用ソールは、装着する義足が土踏まずを有しないため、底面１０の全面に（例えば図１に示すような）パターンが形成されている。なお、本実施形態の競技義足用ソールを、中間層（クッション）を介して、競技義足に装着した場合、中間層（クッション）の厚さや材質を均一とすることが好ましい。 FIG. 1 is a developed view showing a pattern of a bottom surface 10 of a sole for a sports prosthesis according to an embodiment of the present invention. FIG. 1 shows a part of the bottom surface 10 of the sole. As shown in FIG. 1, the sole according to the present embodiment includes a plurality of blocks that are defined by grooves 11 in at least a part of the bottom surface 10 (all regions in the illustrated example) and have a polygonal shape having a hexagonal shape or more in plan view. 12. In the sole for an artificial prosthesis according to the present embodiment, since the prosthesis to be worn does not have an arch, a pattern (for example, as shown in FIG. 1) is formed on the entire bottom surface 10. When the sole for sports prosthesis of the present embodiment is attached to the artificial prosthesis via the intermediate layer (cushion), it is preferable that the thickness and material of the intermediate layer (cushion) be uniform.
　図１に示す実施形態では、全てのブロック１２が、平面形状が六角形以上の多角形状である。一方で、本発明では、一部のブロック１２が、平面形状が六角形以上の多角形状であれば良い。例えば、ソールの前後方向（爪先側～踵側の方向）の一部の領域内のブロック１２が、平面形状が六角形以上の多角形状であるものとすることができ、及び／又は、ソールの幅方向（平面視で上記前後方向に直交する方向）の一部の領域内のブロック１２が、平面形状が六角形以上の多角形状であるものとすることができる。また、当該一部のブロック１２は、平面形状が七角形状、八角形状、又はそれ以上の頂点を有する多角形状とすることもできる。従って、ソールの底面１０の他の一部の領域では、ブロック１２は、平面形状が五角形以下の多角形状とすることもでき、あるいは、多角形以外の平面形状とすることもできる。 で は In the embodiment shown in FIG. 1, all the blocks 12 have a polygonal shape with a planar shape of hexagon or more. On the other hand, in the present invention, some of the blocks 12 may have a polygonal shape having a hexagonal shape or more. For example, the block 12 in a part of the region in the front-rear direction (the direction from the toe side to the heel side) of the sole may have a polygonal shape of a hexagon or more in plan view, and / or The block 12 in a part of the region in the width direction (the direction orthogonal to the front-rear direction in plan view) may have a polygonal shape with a planar shape of hexagon or more. Further, some of the blocks 12 may have a planar shape of a heptagon, a octagon, or a polygon having more vertices. Accordingly, in some other regions of the bottom surface 10 of the sole, the block 12 may have a polygonal shape having a pentagonal shape or less, or may have a planar shape other than the polygonal shape.
　図１に示す実施形態では、平面形状が六角形以上の多角形状の複数のブロック１２は、第１の方向において２つのブロック１２が互いに隣接し、且つ、第１の方向とは異なる第２の方向においても２つのブロック１２が互いに隣接している。すなわち、複数のブロック１２が、ソールの前後方向に対して傾斜した方向（第１の方向）に並んで列をなし、当該列が第２の方向に複数列（図示内では１０列）をなしている。第１の方向に隣接する２つのブロックは、互いに略平行に延在する第１の側壁１２ｃ（平面視で多角形状の辺）をそれぞれ有している。この例では、一部の（特に前後方向一方側（図示例では爪先側）の）第１の側壁１２ｃは、第１の方向に隣接する２つのブロックのそれぞれの、最大の長さを有する側壁である。従って、この例では、複数のブロック１２が、第１の側壁１２ｃが延在する方向に略直交する方向に並んでなす列を、少なくとも１列（図示内では１０列）有している。換言すると、列内では、該ブロック１２の最大長さを有する第１の側壁１２ｃの延在方向に略直交する方向に複数のブロック１２が並んでいる。各ブロック１２の最大長さを有する第１の側壁１２ｃの延在方向は、特には限定されず、ソールの前後方向に対して、例えば０°～４５°傾斜した方向とすることができる。
　また、図１に示す実施形態では、上記列を複数列（図示内では１０列）有し、第２の方向に隣接する列間で隣接する２つのブロック１２（の多数）が、互いに略平行に延在する、第１の側壁１２ｃとは別の第２の側壁１２ｄをそれぞれ有している。 In the embodiment illustrated in FIG. 1, the plurality of blocks 12 each having a polygonal shape having a hexagonal shape or more in a planar shape include two blocks 12 adjacent to each other in a first direction and having a second shape different from the first direction. Also in the direction, the two blocks 12 are adjacent to each other. That is, the plurality of blocks 12 form a row in a direction (first direction) inclined with respect to the front-rear direction of the sole, and the row forms a plurality of rows (10 rows in the drawing) in the second direction. ing. Two blocks adjacent in the first direction each have a first side wall 12c (a polygonal side in plan view) extending substantially parallel to each other. In this example, a part (particularly, one side in the front-rear direction (toe side in the illustrated example)) of the first side wall 12c is a side wall having a maximum length of each of two blocks adjacent in the first direction. It is. Therefore, in this example, the plurality of blocks 12 have at least one row (10 rows in the drawing) arranged in a direction substantially orthogonal to the direction in which the first side wall 12c extends. In other words, in the row, the plurality of blocks 12 are arranged in a direction substantially perpendicular to the extending direction of the first side wall 12c having the maximum length of the block 12. The extending direction of the first side wall 12c having the maximum length of each block 12 is not particularly limited, and may be, for example, a direction inclined by 0 ° to 45 ° with respect to the longitudinal direction of the sole.
Further, in the embodiment shown in FIG. 1, the above-mentioned row has a plurality of rows (10 rows in the drawing), and two (a large number of) blocks 12 adjacent to each other between rows adjacent in the second direction are substantially parallel to each other. , Each having a second side wall 12d different from the first side wall 12c.
　図１に示す実施形態では、底面１０の一部に、階段状の（すなわち、高さが異なる部分を有する）ブロック１２ｂを有している。すなわち、図１に示す実施形態では、ソールの底面１０に形成されたブロック１２は、高さが略一定のブロック１２ａと、階段状のブロック１２ｂとで構成されている。 In the embodiment shown in FIG. 1, a step-like (that is, having a portion having a different height) block 12 b is provided on a part of the bottom surface 10. That is, in the embodiment shown in FIG. 1, the block 12 formed on the bottom surface 10 of the sole is composed of a block 12a having a substantially constant height and a step-shaped block 12b.
　本実施形態では、ソールの前後方向の一方側（図示例では爪先側）から１列目及び２列目では、全てのブロック１２が、高さが略一定のブロック１２ａで構成されている。また、ソールの前後方向の一方側（図示例では爪先側）から３～５列目では、一部のブロック（幅方向一方側（図示例では幅方向外側（体の外側）））のブロック１２は、高さが略一定のブロック１２ａで構成され、他のブロック（幅方向他方側（図示例では、幅方向内側（体の内側）））のブロック１２は、階段状のブロック１２ｂで構成されている。また、ソールの前後方向の一方側（図示例では爪先側）から６～１０列目では、全てのブロック１２が、階段状のブロック１２ｂで構成されている。 In the present embodiment, in the first and second rows from one side (toe side in the illustrated example) of the sole in the front-rear direction, all the blocks 12 are constituted by blocks 12a having a substantially constant height. In the third to fifth rows from one side (toe side in the illustrated example) of the sole in the front-rear direction, some blocks (one side in the width direction (outside in the width direction (outside the body) in the illustrated example)) of blocks 12 Is constituted by a block 12a having a substantially constant height, and the other block (the other side in the width direction (in the illustrated example, the inside in the width direction (inside the body))) is constituted by a step-shaped block 12b. ing. In the sixth to tenth rows from one side of the sole in the front-rear direction (toe side in the illustrated example), all the blocks 12 are configured by step-like blocks 12b.
　図４Ａ、図４Ｂは、ブロックの高さについて説明するための図である。
　ここで、高さが略一定のブロック１２ａのブロック高さ（溝１１の深さ）ｈ１（ｍｍ）は、特に限定されないが、１．０～７．０ｍｍとすることが好ましく、２．０～３．５ｍｍとすることがより好ましく、２．４ｍｍ～３．５ｍｍとすることがさらに好ましい。
　同様に、階段状のブロック１２ｂのブロック全体の高さをｈ１（ｍｍ）とし、ブロック１２ｂの頂部を有する最も高い段の高さをｈ２（ｍｍ）とするとき、例えば図４Ａに示すように、階段状のブロック１２ｂが２段である場合、ｈ１を１．０～７．０ｍｍ、ｈ２ を０．５～２．５ｍｍとすることが好ましく、ｈ１を２．０～３．５ｍｍ 、ｈ２を０．７～１．５ｍｍとすることがより好ましく、ｈ１を２．４ｍｍ～３．５ｍｍ、ｈ２を１．２ｍｍ～１．５ｍｍとすることがさらに好ましい。
　なお、例えば図４Ｂに示すように、階段状のブロック１２ｂが３段以上である場合も、最も高い段でのブロック高さをｈ２として、ｈ１を１．０～７．０ｍｍ、ｈ２ を０．５～２．５ｍｍとすることが好ましく、ｈ１を２．０～３．５ｍｍ 、ｈ２を０．７～１．５ｍｍとすることがより好ましく、ｈ１を２．４ｍｍ～３．５ｍｍ、ｈ２を１．２ｍｍ～１．５ｍｍとすることがさらに好ましい。 4A and 4B are diagrams for explaining the height of the block.
Here, the block height (depth of the groove 11) h1 (mm) of the block 12a having a substantially constant height is not particularly limited, but is preferably 1.0 to 7.0 mm, and is preferably 2.0 to 7.0 mm. It is more preferably 3.5 mm, and even more preferably 2.4 mm to 3.5 mm.
Similarly, when the height of the entire block of the stepped block 12b is h1 (mm) and the height of the highest step having the top of the block 12b is h2 (mm), for example, as shown in FIG. When the step-like block 12b has two steps, it is preferable that h1 is 1.0 to 7.0 mm, h2 is 0.5 to 2.5 mm, h1 is 2.0 to 3.5 mm, and h2 is 0. More preferably, it is set to be 0.7 to 1.5 mm, and it is further preferable that h1 is set to 2.4 mm to 3.5 mm and h2 is set to 1.2 mm to 1.5 mm.
For example, as shown in FIG. 4B, even when the number of steps 12b is three or more, the height of the block at the highest step is h2, h1 is 1.0 to 7.0 mm, and h2 is 0. It is preferable that h1 is 2.0 to 3.5 mm, h2 is more preferably 0.7 to 1.5 mm, h1 is 2.4 to 3.5 mm, and h2 is 1 to 2.5 mm. More preferably, the thickness is set to 0.2 mm to 1.5 mm.
　図示例では、階段状のブロック１２ｂは、２段であり、ブロック１２ｂ全体としての平面形状は、上述のように六角形以上の多角形状であるが、最も高い段の平面形状は、平面視での中心部から放射状に突出する部分１２ｅ（図示例では６つの部分）を有する、アスタリスク型の形状をなしている。なお、図示例では、各階段状のブロック１２ｂにおいて、突出する部分１２ｅは６つであるが、全て又は一部の階段状のブロック１２ｂの最も高い段の平面形状は、上記突出する部分１２ｅが５つ以下又は７つ以上であっても良い。 In the illustrated example, the step-like block 12b has two steps, and the planar shape of the entire block 12b is a polygonal shape of a hexagon or more as described above, but the planar shape of the highest step is a plan view. Has an asterisk-shaped shape having portions 12e (six portions in the illustrated example) radially protruding from the central portion. In the illustrated example, in each stepped block 12b, there are six projecting portions 12e, but the planar shape of the highest step of all or some of the stepped blocks 12b is such that the projecting portion 12e is The number may be five or less or seven or more.
　各列においては、幅方向一方側（図示例では幅方向外側）から幅方向他方側（図示例では幅方向内側）に向かって、隣接する２つのブロック１２の間隔（例えば最短距離）が大きくなる箇所を有している。図示例では、隣接する２つのブロック１２の間隔（例えば最短距離）が小さくなっている箇所も含まれているが、各列においては、幅方向一方側（図示例では幅方向外側）から幅方向他方側（図示例では幅方向内側）に向かって、隣接する２つのブロックの間隔（例えば最短距離）が漸増するようにしても良い。あるいは、最も幅方向一方側（図示例では幅方向外側）の隣接する２つのブロック１２の間隔（例えば最短距離）が、最も幅方向他方側（図示例では幅方向内側）の隣接する２つのブロック１２の間隔（例えば最短距離）より小さくなるようにしても良い。
　また、各列においては、幅方向一方側（図示例では幅方向外側）から（図示例では幅方向内側）に向かって、ブロック１２の平面視での面積が小さくなる箇所を有している。図示例では、幅方向一方側（図示例では幅方向外側）から幅方向他方側（図示例では幅方向内側）に向かって、ブロック１２の平面視での面積が大きくなる箇所も含まれているが、幅方向一方側（図示例では幅方向外側）から幅方向他方側（図示例では幅方向内側）に向かって、ブロック１２の平面視での面積が漸減するようにしても良い。あるいは、最も幅方向一方側（図示例では幅方向外側）のブロック１２の平面視での面積が、最も幅方向他方側（図示例では幅方向内側）のブロック１２の平面視での面積より大きくなるようにしても良い。
　従って、平面視での、ソールの面積に対する溝１１の面積の比率（ネガティブ率）は、幅方向一方側（図示例では幅方向外側）から幅方向他方側（図示例では幅方向内側）に向かって、略漸増している。 In each row, the interval (for example, the shortest distance) between two adjacent blocks 12 increases from one side in the width direction (outside in the width direction in the illustrated example) to the other side in the width direction (inside in the width direction in the illustrated example). It has a place. In the illustrated example, a portion where the interval (for example, the shortest distance) between two adjacent blocks 12 is small is also included, but in each row, from one side in the width direction (outside in the width direction in the illustrated example) in the width direction. The interval (for example, the shortest distance) between two adjacent blocks may gradually increase toward the other side (in the illustrated example, in the width direction). Alternatively, the interval (for example, the shortest distance) between two adjacent blocks 12 on one side in the width direction (the outer side in the width direction in the illustrated example) is two adjacent blocks on the other side in the width direction (the inner side in the width direction in the illustrated example). Twelve intervals (for example, the shortest distance) may be used.
Further, each row has a portion where the area of the block 12 in plan view decreases from one side in the width direction (outside in the width direction in the illustrated example) to (inside in the width direction in the illustrated example). In the illustrated example, there is also included a portion where the area of the block 12 in plan view increases from one side in the width direction (outside in the width direction in the illustrated example) to the other side in the width direction (inside in the width direction in the illustrated example). However, the area of the block 12 in plan view may gradually decrease from one side in the width direction (outside in the width direction in the illustrated example) to the other side in the width direction (inside in the width direction in the illustrated example). Alternatively, the area in plan view of the block 12 on one side in the width direction (outside in the width direction in the illustrated example) is larger than the area in plan view on the block 12 on the other side in the width direction (inside in the width direction in the example shown). You may make it.
Accordingly, the ratio (negative rate) of the area of the groove 11 to the area of the sole in a plan view is from one side in the width direction (outside in the width direction in the illustrated example) to the other side in the width direction (inside in the width direction in the illustrated example). And it is increasing gradually.
　また、階段状のブロック１２ｂを複数個有する各列においては、幅方向一方側（図示例では幅方向外側）から幅方向他方側（図示例では幅方向内側）に向かって、階段状ブロック１２ｂの平面視での面積に対する、最も高い段の平面視での面積の割合が小さくなる箇所を有している。具体的には、幅方向一方側（図示例では幅方向外側）から幅方向他方側（図示例では幅方向内側）に向かって、突出する部分１２ｅの幅が小さくなる箇所を有している。図示例では、幅方向一方側（図示例では幅方向外側）から幅方向他方側（図示例では幅方向内側）に向かって、当該割合（あるいは突出する部分１２ｅの幅）が大きくなっている箇所も含まれているが、当該割合（あるいは突出する部分１２ｅの幅）が漸減するようにしても良い。あるいは、最も幅方向一方側（図示例では幅方向外側）のブロック１２での当該割合（あるいは突出する部分１２ｅの幅）が、最も幅方向他方側（図示例では幅方向内側）のブロック１２での当該割合（あるいは突出する部分１２ｅの幅）より大きくなるようにしても良い。
　なお、本実施形態では、幅方向一方側を幅方向外側としているが、本発明では、幅方向一方側を幅方向内側としても良い。 In each row having a plurality of step-like blocks 12b, the step-like blocks 12b are arranged from one side in the width direction (outside in the width direction in the illustrated example) to the other side in the width direction (inside in the width direction in the example). There is a portion where the ratio of the area of the highest step in plan view to the area in plan view is small. Specifically, there is a portion where the width of the protruding portion 12e becomes smaller from one side in the width direction (outside in the width direction in the illustrated example) to the other side in the width direction (inside in the width direction in the illustrated example). In the illustrated example, a portion where the ratio (or the width of the protruding portion 12e) increases from one side in the width direction (outside in the width direction in the illustrated example) to the other side in the width direction (inside in the width direction in the illustrated example). However, the ratio (or the width of the protruding portion 12e) may be gradually reduced. Alternatively, the ratio (or the width of the protruding portion 12e) in the block 12 on the one side in the width direction (the outer side in the width direction in the illustrated example) is the block 12 on the other side in the width direction (the inner side in the width direction in the illustrated example). (Or the width of the protruding portion 12e).
In the present embodiment, one side in the width direction is set to the outside in the width direction. However, in the present invention, one side in the width direction may be set to the inside in the width direction.
　また、ソールの前後方向の一方側（図示例では爪先側）の列から他方側（図示例では踵側）の列に向かって、列間の間隔（それらを区画する溝１１の溝幅（例えば溝幅の最大値））が略漸増している。従って、平面視での、ソールの面積に対する溝１１の面積の比率（ネガティブ率）は、ソールの前後方向の一方側（図示例では爪先側）の列から他方側（図示例では踵側）の列に向かって、略漸増している。 In addition, from the row on one side (toe side in the illustrated example) of the sole in the front-rear direction to the row on the other side (heel side in the illustrated example), the interval between the rows (the groove width of the groove 11 that partitions them (for example, The maximum value of the groove width) is increasing gradually. Therefore, in plan view, the ratio of the area of the groove 11 to the area of the sole (negative rate) is from one side (toe side in the illustrated example) of the sole in the front-rear direction to the other side (heel side in the illustrated example). It gradually increases toward the row.
　また、ソールの前後方向の一方側（図示例では爪先側）の列から他方側（図示例では踵側）の列に向かって、ブロック１２の平面視での面積（例えば列での平均値）が略漸減している。また、階段状のブロック１２ｂを複数個有する各列においては、ソールの前後方向の一方側（図示例では爪先側）の列から他方側（図示例では踵側）の列に向かって、幅方向一方側（図示例では幅方向外側）から幅方向他方側（図示例では幅方向内側）に向かって、階段状ブロック１２ｂの平面視での面積に対する、最も高い段の平面視での面積の割合（例えば列での平均値）が略漸減している。また、階段状のブロック１２ｂを複数個有する各列においては、ソールの前後方向の一方側（図示例では爪先側）の列から他方側（図示例では踵側）の列に向かって、突出する部分１２ｅの幅（例えば列での平均値）が略漸減している。 Further, the area of the block 12 in a plan view (for example, the average value in the row) from the row on the one side (toe side in the illustrated example) to the row on the other side (heel side in the illustrated example) of the sole in the front-rear direction. Is gradually decreasing. In each row having a plurality of step-like blocks 12b, the width direction from the row on one side (toe side in the illustrated example) of the sole in the front-rear direction toward the row on the other side (heel side in the illustrated example) in the width direction. The ratio of the area of the highest step in plan view to the area in plan view of the stepped block 12b from one side (outside in the width direction in the illustrated example) to the other side in the width direction (inside in the illustrated example). (For example, the average value in the column) decreases substantially gradually. In each row having a plurality of step-like blocks 12b, the sole projects from the row on one side (toe side in the illustrated example) in the front-rear direction toward the row on the other side (heel side in the illustrated example). The width of the portion 12e (for example, the average value in the column) is substantially gradually reduced.
　図１に示す実施形態では、溝１１は、ソールの前後方向にジグザグ状に延在している複数本の溝が、略幅方向に延びる複数本の溝によって接続されてなる。なお、別の見方をすれば、溝１１は、略第１の方向にジグザグ状に延在している複数本の溝が、略第２の方向に延びる複数本の溝によって接続されてなる。さらに別の見方をすれば、溝１１は、略第２の方向にジグザグ状に延在している複数本の溝が、略第１の方向に延びる複数本の溝によって接続されてなる。 In the embodiment shown in FIG. 1, the groove 11 is formed by connecting a plurality of grooves extending in a zigzag shape in the front-rear direction of the sole by a plurality of grooves extending substantially in the width direction. From another point of view, the groove 11 is formed by connecting a plurality of grooves extending in a substantially zigzag manner in a first direction by a plurality of grooves extending in a substantially second direction. From a different viewpoint, the groove 11 is formed by connecting a plurality of grooves extending in a zigzag manner in a substantially second direction by a plurality of grooves extending in a substantially first direction.
　ここで、本実施形態においては、平面視において、複数のブロック１２のうち、第１の方向（この例では、最大長さを有する第１の側壁１２ｃが延在する方向に略直交する方向）に隣接する２つのブロック１２間の最短距離をｄ１とし、隣接する２つブロック１２のうち最大長さが大きい方のブロック１２の最大長さをＬとするとき、関係式、
ｄ１／Ｌ≦０．０６
を満たしている。
　図１に示す例では、ソールの前後方向の一方側（図示例では爪先側）の一部の領域に位置する列において、列内の一部又は全てのブロック１２が、上記関係式、
ｄ１／Ｌ≦０．０６
を満たしている。
　なお、耐摩耗性を向上させる観点からは、ｄ１／Ｌ≦０．０２５とすることがより好ましく、ｄ１／Ｌ≦０．０２とすることがさらに好ましい。一方で、排水性を確保する観点からは、ｄ１／Ｌ≧０．０１とすることが好ましい。
　例えば、最短距離ｄ１は、耐摩耗性を向上させる観点からは、２ｍｍ以下とすることが好ましく、１．５ｍｍ以下とすることがより好ましく、１．０ｍｍ以下とすることがさらに好ましい。一方で、最短距離ｄ１は、排水性を確保する観点からは、０．２ｍｍ以上とすることが好ましく、０．５ｍｍ以上とすることがより好ましく、０．７ｍｍ以上とすることがさらに好ましい。 Here, in the present embodiment, the first direction (in this example, the direction substantially orthogonal to the direction in which the first side wall 12c having the maximum length extends) of the plurality of blocks 12 in plan view. When the shortest distance between the two adjacent blocks 12 is d1, and the maximum length of the larger one of the two adjacent blocks 12 is L, the relational expression:
d1 / L ≦ 0.06
Meets.
In the example illustrated in FIG. 1, in a row positioned in a partial area on one side (toe side in the illustrated example) of the sole in the front-rear direction, a part or all of the blocks 12 in the row are represented by the above relational expression.
d1 / L ≦ 0.06
Meets.
From the viewpoint of improving the wear resistance, d1 / L ≦ 0.025 is more preferable, and d1 / L ≦ 0.02 is more preferable. On the other hand, from the viewpoint of ensuring drainage, it is preferable that d1 / L ≧ 0.01.
For example, the shortest distance d1 is preferably 2 mm or less, more preferably 1.5 mm or less, and even more preferably 1.0 mm or less, from the viewpoint of improving wear resistance. On the other hand, the shortest distance d1 is preferably at least 0.2 mm, more preferably at least 0.5 mm, even more preferably at least 0.7 mm, from the viewpoint of ensuring drainage.
　また、本実施形態においては、第２の側壁１２ｄ間の最短距離をｄ２（ｍｍ）とするとき、最短距離ｄ２（ｍｍ）は、複数列のうち、前後方向の一方側（図示例では爪先側）の列から他方側（図示例では踵側）の列に向かって大きくなる箇所を有している。
　以下、本実施形態の競技義足用ソールの作用効果について説明する。以下の作用効果については、本実施形態の競技義足用ソールを競技義足の接地域に装着した際のものである。 In the present embodiment, when the shortest distance between the second side walls 12d is d2 (mm), the shortest distance d2 (mm) is one side in the front-rear direction (toe side in the illustrated example) of the plurality of rows. ) Has a portion that becomes larger from the row on the other side (heel side in the illustrated example).
Hereinafter, the operation and effect of the sports prosthetic sole of the present embodiment will be described. The following operation and effects are obtained when the sole for a sports prosthesis according to the present embodiment is attached to a contact area of a sports prosthesis.
　本実施形態の競技義足用ソールによれば、底面１０の少なくとも一部の領域に、溝１１により区画され、平面形状が六角形以上の多角形状である複数のブロック１２を有しており、上記関係式、ｄ１／Ｌ≦０．０６を満たしているため、ブロック１２の大きさ（従って、剛性）に比して、第１の方向に隣接するブロック１２間の最短距離ｄ１が短い。従って、接地時にブロック１２が撓んで膨出した際に、隣接するブロック１２同士が支え合うことができ、ブロック１２の滑りを抑制して、耐摩耗性を向上させることができる。特に、本実施形態では、第１の方向に隣接する２つのブロック１２は、互いに略平行に延在する第１の側壁１２ｃをそれぞれ有し、複数のブロック１２が、第１の側壁１２ｃが延在する方向に略直交する方向に並んでなす列を、少なくとも１列（図示内では１０列）有しているため、上記略平行に延在する箇所全体にわたって最短距離ｄ１で一定となるため、上記の支え合う効果を有効に得ることができる。そして、特に、本実施形態では、当該第１の側壁１２ｃは、第１の方向に隣接する２つのブロック１２のそれぞれの最大の長さを有する側壁であるため、当該最大長さ全域にわたって、上記の支え合う効果を有効に得ることができる。また、本実施形態では、上記列を複数列（図示内では１０列）有し、第２の方向に隣接する列間で隣接する２つのブロック１２が、互いに略平行に延在する第２の側壁１２ｄをそれぞれ有するため、ソールの前後方向でも隣接するブロック１２間で支え合う効果を得ることができる。また、本実施形態では、第１の方向が、ソールの前後方向に対して傾斜した方向であるため、接地時に前後方向の力のみならず、幅方向の力も大きく加わった際に、特にブロック１２が動く方向に支え合うことができ、上記の効果をより効果的に得ることができる。
　以上のように、本実施形態の競技義足用ソールによれば、耐摩耗性を向上させることができる。 According to the athletic prosthetic sole of the present embodiment, at least a part of the bottom surface 10 has a plurality of blocks 12 which are partitioned by the grooves 11 and have a polygonal shape having a hexagonal shape or more. Since the relational expression, d1 / L ≦ 0.06, is satisfied, the shortest distance d1 between the blocks 12 adjacent in the first direction is shorter than the size (and, therefore, rigidity) of the blocks 12. Therefore, when the blocks 12 flex and bulge at the time of touching the ground, the adjacent blocks 12 can support each other, and the sliding of the blocks 12 can be suppressed, and the wear resistance can be improved. In particular, in the present embodiment, two blocks 12 adjacent in the first direction each have a first side wall 12c extending substantially parallel to each other, and the plurality of blocks 12 are formed by extending the first side wall 12c. Since there is at least one row (ten rows in the drawing) arranged in a direction substantially perpendicular to the existing direction, the shortest distance d1 is constant over the entire portion extending substantially in parallel. The above-mentioned supporting effect can be obtained effectively. In particular, in the present embodiment, the first side wall 12c is the side wall having the maximum length of each of the two blocks 12 adjacent in the first direction. The effect of supporting each other can be obtained effectively. Further, in the present embodiment, a plurality of rows (10 rows in the drawing) are provided, and two blocks 12 adjacent to each other between rows adjacent in the second direction extend in a second Since each of the side walls 12d is provided, an effect of supporting the blocks 12 adjacent to each other in the front-rear direction of the sole can be obtained. Further, in the present embodiment, the first direction is a direction inclined with respect to the front-back direction of the sole. Can support each other in the moving direction, and the above effect can be obtained more effectively.
As described above, according to the sole for athletic artificial leg of the present embodiment, the wear resistance can be improved.
　さらに、本実施形態によれば、ソールの前後方向の一方側（図示例では爪先側）の列から他方側（図示例では踵側）の列に向かって、列間の間隔（それらを区画する溝１１の溝幅（例えば溝幅の最大値））が略漸増しているため、比較的摩耗の多い爪先側で上記のブロック１２同士が支え合う効果を有効に得つつも、比較的摩耗の少ない踵側で排水性を確保することができるため、耐摩耗性と排水性とを高い次元で両立させることができる。 Further, according to the present embodiment, the interval between the rows (they are partitioned) from the row on one side (toe side in the illustrated example) of the sole in the front-rear direction toward the row on the other side (heel side in the illustrated example). Since the groove width of the groove 11 (for example, the maximum value of the groove width) is almost gradually increased, the effect of supporting the blocks 12 on the toe side where the wear is relatively large is obtained, but the wear is relatively small. Since drainage can be ensured on a small heel side, both wear resistance and drainage can be achieved at a high level.
　また、本実施形態によれば、平面視での、ソールの面積に対する溝１１の面積の比率（ネガティブ率）は、ソールの前後方向の一方側（図示例では爪先側）の列から他方側（図示例では踵側）の列に向かって、略漸増しているため、比較的摩耗の多い爪先側で上記のブロック１２同士が支え合う効果を有効に得つつも、比較的摩耗の少ない踵側で排水性を確保することができるため、耐摩耗性と排水性とを高い次元で両立させることができる。 Further, according to the present embodiment, the ratio (negative rate) of the area of the groove 11 to the area of the sole in a plan view is from one side (toe side in the illustrated example) of the sole in the front-rear direction and the other side (toe side). (In the illustrated example, the heel side in the illustrated example) is gradually increased toward the row, so that the effect of supporting the blocks 12 against each other on the toe side where the wear is relatively large is obtained, but the heel side where the wear is relatively small. As a result, drainage can be ensured, so that both abrasion resistance and drainage can be achieved at a high level.
　また、本実施形態によれば、ソールの前後方向の一方側（図示例では爪先側）の列から他方側（図示例では踵側）の列に向かって、ブロック１２の平面視での面積（例えば列での平均値）が略漸減しているため、比較的摩耗の多い爪先側で上記のブロック１２同士が支え合う効果を有効に得つつも、比較的摩耗の少ない踵側で排水性を確保することができるため、耐摩耗性と排水性とを高い次元で両立させることができる。 Further, according to the present embodiment, the area of the block 12 in plan view (from the row on one side (toe side in the illustrated example) to the row on the other side (heel side in the illustrated example) in the front-rear direction of the sole is shown. (E.g., the average value in the row) is gradually reduced, so that the effect that the blocks 12 support each other on the toe side where the wear is relatively large is effectively obtained, but the drainage property is improved on the heel side where the wear is relatively small. Since it can be ensured, it is possible to achieve both abrasion resistance and drainage at a high level.
　また、本実施形態によれば、階段状のブロック１２ｂを複数個有する各列においては、ソールの前後方向の一方側（図示例では爪先側）の列から他方側（図示例では踵側）の列に向かって、幅方向一方側（図示例では幅方向外側）から幅方向他方側（図示例では幅方向内側）に向かって、階段状ブロック１２ｂの平面視での面積に対する、最も高い段の平面視での面積の割合（例えば列での平均値）が略漸減しているため、比較的摩耗の多い爪先側で上記のブロック１２同士が支え合う効果を有効に得つつも、比較的摩耗の少ない踵側で排水性を確保することができるため、耐摩耗性と排水性とを高い次元で両立させることができる。 Further, according to the present embodiment, in each row having a plurality of stepped blocks 12b, the row from one side (toe side in the illustrated example) of the sole in the front-rear direction to the other side (heel side in the illustrated example). From the one side in the width direction (outside in the width direction in the illustrated example) toward the column, the other step in the width direction (the inside in the width direction in the illustrated example) is the highest step relative to the area in plan view of the stepped block 12b. Since the ratio of the area in plan view (for example, the average value in the row) is substantially gradually reduced, the effect that the blocks 12 support each other on the toe side where the wear is relatively large is obtained, but the wear is relatively small. Since the drainage property can be ensured on the heel side where the wear is small, both the wear resistance and the drainage property can be achieved at a high level.
　また、本実施形態によれば、階段状のブロック１２ｂを複数個有する各列においては、ソールの前後方向の一方側（図示例では爪先側）の列から他方側（図示例では踵側）の列に向かって、突出する部分１２ｅの幅（例えば列での平均値）が略漸減しているため、比較的摩耗の多い爪先側で上記のブロック１２同士が支え合う効果を有効に得つつも、比較的摩耗の少ない踵側で排水性を確保することができるため、耐摩耗性と排水性とを高い次元で両立させることができる。 Further, according to the present embodiment, in each row having a plurality of stepped blocks 12b, the row from one side (toe side in the illustrated example) of the sole in the front-rear direction to the other side (heel side in the illustrated example). Since the width (for example, the average value in the row) of the protruding portion 12e is gradually reduced toward the row, the effect that the blocks 12 support each other on the toe side where the wear is relatively large can be effectively obtained. Since the drainage property can be ensured on the heel side where the wear is relatively small, both the wear resistance and the drainage property can be achieved at a high level.
　また、本実施形態によれば、底面１０の一部に、階段状のブロック１２ｂを有しているため、接地時に高い段が潰れて接地性が向上し、さらに、段差を有することにより、排水性も向上する。さらに、最も高い段の平面形状は、平面視での中心部から放射状に突出する部分を有しているため、排水をより一層促進しつつも、エッジ成分を多くして駆動性を向上させることもできる。 In addition, according to the present embodiment, the stepped block 12b is provided in a part of the bottom surface 10, so that a high step is crushed at the time of contact with the ground, and the contact property is improved. The performance is also improved. Furthermore, since the planar shape of the highest step has a portion radially protruding from the center in plan view, it is possible to further enhance drainage and improve the drivability by increasing the edge component. Can also.
　図２は、本発明の他の実施形態にかかる競技義足用ソールの底面のパターンを示す展開図である。図２に示すように、本実施形態のソールは、底面１０の少なくとも一部の領域に、溝１１により区画され、平面形状が六角形以上の多角形状である複数のブロック１２を有している。 FIG. 2 is a developed view showing a pattern on a bottom surface of a sole for a sports prosthesis according to another embodiment of the present invention. As shown in FIG. 2, the sole of the present embodiment has a plurality of blocks 12 that are defined by grooves 11 and have a polygonal shape of a hexagon or more in at least a part of the area of the bottom surface 10. .
　図２に示す実施形態でも、全てのブロック１２が、平面形状が六角形以上の多角形状（本実施形態では、六角形状）である。 で も Also in the embodiment shown in FIG. 2, all the blocks 12 have a polygonal shape having a hexagonal shape or more (in this embodiment, a hexagonal shape).
　図２に示す実施形態では、平面形状が六角形状の複数のブロック１２は、第１の方向（この例では幅方向）において２つのブロック１２が互いに隣接し、且つ、第２の方向（この例では前後方向）においても２つのブロック１２が互いに隣接している。すなわち、ブロック１２は、ソールの前後方向に対して（この例では９０°）傾斜した方向（第１の方向）に列をなし、当該列が第２の方向に複数列をなしている。第１の方向に隣接する２つのブロックは、互いに略平行に延在する第１の側壁１２ｃをそれぞれ有している。この例では、複数のブロック１２が、第１の側壁１２ｃが延在する方向に対して傾斜した方向に並んでなす列を、少なくとも１列（図示内では１０列）有している。換言すると、列内では、該ブロック１２の第１の側壁１２ｃの延在方向に対して傾斜した方向に複数のブロック１２が並んでいる。
　また、図２に示す実施形態では、上記列を複数列（図示内では１０列）有し、第２の方向に隣接する列間で隣接する２つのブロック１２が、互いに略平行に延在する、第１の側壁１２ｃとは別の第２の側壁１２ｄをそれぞれ有している。 In the embodiment illustrated in FIG. 2, the plurality of blocks 12 having a hexagonal planar shape include two blocks 12 adjacent to each other in a first direction (in this example, a width direction) and a second direction (in this example). (In the front-back direction), the two blocks 12 are adjacent to each other. That is, the blocks 12 form rows in a direction (first direction) inclined (90 ° in this example) with respect to the front-rear direction of the sole, and the rows form a plurality of rows in the second direction. Two blocks adjacent in the first direction each have a first side wall 12c extending substantially parallel to each other. In this example, the plurality of blocks 12 have at least one row (10 rows in the drawing) formed in a direction inclined with respect to the direction in which the first side wall 12c extends. In other words, in the row, the plurality of blocks 12 are arranged in a direction inclined with respect to the extending direction of the first side wall 12c of the block 12.
Further, in the embodiment shown in FIG. 2, the above-mentioned rows have a plurality of rows (10 rows in the drawing), and two blocks 12 adjacent to each other between rows adjacent in the second direction extend substantially parallel to each other. , A second side wall 12d different from the first side wall 12c.
　図２に示す実施形態では、ソールの底面１０に形成されたブロック１２は、高さが略一定のブロック１２ａのみで構成されている。ここで、高さが略一定のブロック１２ａのブロック高さ（溝１１の深さ）は、特に限定されないが、例えば、１．０～７．０ｍｍとすることができる。 で は In the embodiment shown in FIG. 2, the block 12 formed on the bottom surface 10 of the sole is composed of only the block 12a having a substantially constant height. Here, the block height (depth of the groove 11) of the block 12a having a substantially constant height is not particularly limited, but may be, for example, 1.0 to 7.0 mm.
　図２に示す実施形態では、各列において、隣接する２つのブロック１２の間隔（例えば最短距離ｄ１）は、一定である。また、列によっては、ブロック１２の平面視での面積は、一定である。 In the embodiment shown in FIG. 2, the interval between two adjacent blocks 12 (for example, the shortest distance d1) is constant in each column. In some rows, the area of the block 12 in a plan view is constant.
　また、ソールの前後方向の一方側（図示例では爪先側）及び他方側（図示例では踵側）の列から前後方向の中央部に向かって、列間の間隔（それらを区画する溝１１の溝幅（例えば溝幅の最大値））が略漸増している。従って、平面視での、ソールの面積に対する溝１１の面積の比率（ネガティブ率）は、ソールの前後方向の一方側（図示例では爪先側）及び他方側（図示例では踵側）の列から前後方向の中央部に向かって、略漸増している。 In addition, the spacing between the rows (the grooves 11 that partition them) from one side (toe side in the illustrated example) and the other side (heel side in the illustrated example) of the sole in the front-rear direction toward the center in the front-rear direction. The groove width (for example, the maximum value of the groove width) increases substantially gradually. Therefore, in plan view, the ratio of the area of the groove 11 to the area of the sole (negative rate) is determined from the row on one side (toe side in the illustrated example) and the other side (heel side in the illustrated example) in the front-rear direction of the sole. It gradually increases toward the center in the front-rear direction.
　また、ソールの前後方向の一方側（図示例では爪先側）及び他方側（図示例では踵側）の列から前後方向の中央部に向かって、ブロック１２の平面視での面積（例えば列での平均値）が略漸減している。 Further, the area of the block 12 in a plan view (for example, in rows) from one side (toe side in the illustrated example) and the other side (heel side in the illustrated example) of the sole in the front-rear direction toward the center in the front-rear direction. Average value) is decreasing gradually.
　ここで、図２に示す実施形態においては、平面視において、複数のブロック１２のうち、第１の方向（この例では、幅方向）に隣接する２つのブロック１２間の最短距離をｄ１とし、隣接する２つブロック１２のうち最大長さが大きい方のブロック１２の最大長さをＬとするとき、関係式、
ｄ１／Ｌ≦０．０６
を満たしている。
　図２に示す例では、ソールの前後方向の一方側（図示例では爪先側）の一部の領域に位置する列において、列内の一部又は全てのブロック１２が、上記関係式、
ｄ１／Ｌ≦０．０６
を満たしている。
　なお、耐摩耗性を向上させる観点からは、ｄ１／Ｌ≦０．０２５とすることがより好ましく、ｄ１／Ｌ≦０．０２とすることがさらに好ましい。一方で、排水性を確保する観点からは、ｄ１／Ｌ≧０．０１とすることが好ましい。
　例えば、最短距離ｄ１は、耐摩耗性を向上させる観点からは、２ｍｍ以下とすることが好ましく、１．５ｍｍ以下とすることがより好ましく、１．０ｍｍ以下とすることがさらに好ましい。一方で、最短距離ｄ１は、排水性を確保する観点からは、０．２ｍｍ以上とすることが好ましく、０．５ｍｍ以上とすることがより好ましく、０．７ｍｍ以上とすることがさらに好ましい。 Here, in the embodiment shown in FIG. 2, the shortest distance between two blocks 12 adjacent in the first direction (in this example, the width direction) among the plurality of blocks 12 in plan view is d1, When the maximum length of the larger one of the two adjacent blocks 12 is L, the relational expression:
d1 / L ≦ 0.06
Meets.
In the example illustrated in FIG. 2, in a row located in a partial area on one side (toe side in the illustrated example) of the sole in the front-rear direction, a part or all of the blocks 12 in the row are determined by the above relational expression.
d1 / L ≦ 0.06
Meets.
From the viewpoint of improving the wear resistance, d1 / L ≦ 0.025 is more preferable, and d1 / L ≦ 0.02 is more preferable. On the other hand, from the viewpoint of ensuring drainage, it is preferable that d1 / L ≧ 0.01.
For example, the shortest distance d1 is preferably 2 mm or less, more preferably 1.5 mm or less, and still more preferably 1.0 mm or less, from the viewpoint of improving wear resistance. On the other hand, the shortest distance d1 is preferably at least 0.2 mm, more preferably at least 0.5 mm, even more preferably at least 0.7 mm, from the viewpoint of ensuring drainage.
　本実施形態において、第２の側壁間の最短距離をｄ２（ｍｍ）とするとき、最短距離ｄ２（ｍｍ）は、複数列のうち、前後方向の一方側（図示例では爪先側）の列及び他方側（図示例では踵側）の列から前後方向の中央部に向かって漸増している。
　以下、図２に示す実施形態の競技義足用ソールの作用効果について説明する。以下の作用効果については、図２に示す実施形態の競技義足用ソールを競技義足の接地域に装着した際のものである。 In this embodiment, assuming that the shortest distance between the second side walls is d2 (mm), the shortest distance d2 (mm) is one of a plurality of rows in the front-rear direction (toe side in the illustrated example) and It gradually increases from the row on the other side (heel side in the illustrated example) toward the center in the front-rear direction.
Hereinafter, the operation and effect of the athletic artificial leg sole of the embodiment shown in FIG. 2 will be described. The following operation and effects are obtained when the sole for sports prosthesis of the embodiment shown in FIG.
　図２に示す競技義足用ソールによれば、底面１０の少なくとも一部の領域に、溝１１により区画され、平面形状が六角形以上の多角形状である複数のブロック１２を有しており、上記関係式、ｄ１／Ｌ≦０．０６を満たしているため、ブロック１２の大きさ（従って、剛性）に比して、第１の方向に隣接するブロック１２間の最短距離ｄ１が短い。従って、接地時にブロック１２が撓んで膨出した際に、隣接するブロック１２同士が支え合うことができ、ブロック１２の滑りを抑制して、耐摩耗性を向上させることができる。特に、本実施形態では、第１の方向に隣接する２つのブロック１２は、互いに略平行に延在する第１の側壁１２ｃをそれぞれ有し、複数のブロックが、第１の側壁１２ｃが延在する方向に略直交する方向に並んでなす列を、少なくとも１列（図示内では１０列）有しているため、上記略平行に延在する箇所全体にわたって最短距離ｄ１で一定となるため、上記の支え合う効果を有効に得ることができる。そして、特に、本実施形態では、当該第１の側壁１２ｃは、第１の方向に隣接する２つのブロック１２のそれぞれの最大の長さを有する側壁である箇所を有するため、当該箇所では、当該最大長さ全域にわたって、上記の支え合う効果を有効に得ることができる。また、本実施形態では、上記列を複数列（図示内では１０列）有し、第２の方向に隣接する列間で隣接する２つのブロック１２が、互いに略平行に延在する第２の側壁１２ｄをそれぞれ有するため、ソールの前後方向でも隣接するブロック１２間で支え合う効果を得ることができる。また、本実施形態では、第１の方向が、ソールの前後方向に対して傾斜した方向（幅方向）であるため、接地時に前後方向の力のみならず、幅方向の力も大きく加わった際に、特にブロック１２が動く方向に支え合うことができ、上記の効果をより効果的に得ることができる。
　以上のように、図２に示す実施形態の競技義足用ソールによれば、耐摩耗性を向上させることができる。 According to the athletic prosthetic sole shown in FIG. 2, in at least a part of the area of the bottom surface 10, the sole has a plurality of blocks 12 which are defined by grooves 11 and have a polygonal shape of a hexagon or more. Since the relational expression, d1 / L ≦ 0.06, is satisfied, the shortest distance d1 between the blocks 12 adjacent in the first direction is shorter than the size (and, therefore, rigidity) of the blocks 12. Therefore, when the blocks 12 flex and bulge at the time of touching the ground, the adjacent blocks 12 can support each other, and the sliding of the blocks 12 can be suppressed, and the wear resistance can be improved. In particular, in the present embodiment, the two blocks 12 adjacent in the first direction each have a first side wall 12c extending substantially in parallel with each other, and the plurality of blocks are formed by extending the first side wall 12c. Since at least one row (ten rows in the drawing) is arranged in a direction substantially orthogonal to the direction in which the direction is changed, the shortest distance d1 is constant over the entire portion extending substantially in parallel. The effect of supporting each other can be obtained effectively. And especially in this embodiment, since the said 1st side wall 12c has the part which is the side wall which has the maximum length of each of the two blocks 12 adjacent in the 1st direction, the said part WHEREIN: The above-described supporting effect can be effectively obtained over the entire maximum length. Further, in the present embodiment, a plurality of rows (10 rows in the drawing) are provided, and two blocks 12 adjacent to each other between rows adjacent in the second direction extend in a second Since each of the side walls 12d is provided, an effect of supporting the blocks 12 adjacent to each other in the front-rear direction of the sole can be obtained. In the present embodiment, since the first direction is a direction (width direction) inclined with respect to the front-back direction of the sole, not only the force in the front-back direction but also the force in the width direction is greatly applied at the time of touchdown. In particular, the blocks 12 can be supported in the moving direction, and the above-described effects can be obtained more effectively.
As described above, according to the sole for an artificial prosthesis of the embodiment shown in FIG. 2, the wear resistance can be improved.
　図２に示す実施形態では、ソールの前後方向の一方側（図示例では爪先側）及び他方側（図示例では踵側）の列から前後方向の中央部に向かって、列間の間隔（それらを区画する溝１１の溝幅（例えば溝幅の最大値））が略漸増しているため、比較的摩耗の大きい爪先側及び場合によって摩耗の大きい踵側の耐摩耗性を向上させつつ、比較的摩耗の小さい前後方向中央部で排水性を向上させることができ、耐摩耗性と排水性とを高い次元で両立させることができる。 In the embodiment shown in FIG. 2, the spacing between the rows (from the row on one side (toe side in the illustrated example) and the other side (heel side in the illustrated example) of the sole in the front-rear direction toward the center in the front-rear direction is shown. Since the groove width (for example, the maximum value of the groove width) of the groove 11 defining the groove is substantially gradually increased, the wear resistance of the toe side where the wear is relatively large and the heel side where the wear is large in some cases is improved, and the comparison is made. The drainage property can be improved at the central portion in the front-rear direction where the abrasion is small, and the abrasion resistance and the drainage property can be compatible at a high level.
　また、図２に示す実施形態では、平面視での、ソールの面積に対する溝１１の面積の比率（ネガティブ率）は、ソールの前後方向の一方側（図示例では爪先側）及び他方側（図示例では踵側）の列から前後方向の中央部に向かって、略漸増しているため、比較的摩耗の大きい爪先側及び場合によって摩耗の大きい踵側の耐摩耗性を向上させつつ、比較的摩耗の小さい前後方向中央部で排水性を向上させることができ、耐摩耗性と排水性とを高い次元で両立させることができる。 In the embodiment shown in FIG. 2, the ratio of the area of the groove 11 to the area of the sole (negative ratio) in plan view is one side (toe side in the illustrated example) and the other side (FIG. In the illustrated example, since it gradually increases from the row on the heel side) toward the center in the front-rear direction, the wear resistance on the toe side where the wear is relatively large and in some cases the heel side where the wear is large is improved, The drainage property can be improved at the central portion in the front-rear direction where the abrasion is small, and the abrasion resistance and the drainage property can be compatible at a high level.
　また、図２に示す実施形態では、ソールの前後方向の一方側（図示例では爪先側）及び（図示例では踵側）の列から前後方向の中央部に向かって、ブロック１２の平面視での面積（例えば列での平均値）が略漸減しているため、比較的摩耗の大きい爪先側及び場合によって摩耗の大きい踵側の耐摩耗性を向上させつつ、比較的摩耗の小さい前後方向中央部で排水性を向上させることができ、耐摩耗性と排水性とを高い次元で両立させることができる。
　このように、図２に示す実施形態は、爪先のみならず踵側でも摩耗が大きい競技種目や競技者等の場合に、特に有利である。 In the embodiment shown in FIG. 2, the block 12 is viewed in plan from the row on one side (toe side in the illustrated example) and the row on the heel side (in the illustrated example) of the sole in the front-rear direction. The area (e.g., the average value in a row) is substantially gradually reduced, so that the wear resistance on the toe side where the wear is relatively large and the heel side where the wear is large in some cases is improved while the center in the front-rear direction where the wear is relatively small. The drainage property can be improved in the part, and both the wear resistance and the drainage property can be achieved at a high level.
As described above, the embodiment shown in FIG. 2 is particularly advantageous in the case of an athletic event, an athlete, and the like in which wear is large not only on the toe but also on the heel side.
　本発明では、図１、図２に示す実施形態にように、第１の方向に隣接する２つのブロック１２は、互いに略平行に延在する第１の側壁１２ｃをそれぞれ有し、複数のブロック１２が、第１の側壁１２ｃが延在する方向に略直交する方向に並んでなす列を、少なくとも１列有することが好ましい。耐摩耗性をより向上させることができるからである。 In the present invention, as in the embodiment shown in FIGS. 1 and 2, two blocks 12 adjacent in the first direction each have a first side wall 12c extending substantially parallel to each other, and a plurality of blocks 12 are provided. Preferably, at least one row of the rows 12 is arranged in a direction substantially perpendicular to the direction in which the first side wall 12c extends. This is because the wear resistance can be further improved.
　本発明では、図１に示す実施形態にように、少なくとも１つの列において、最短距離ｄ１（ｍｍ）は、幅方向一方側から他方側に向かって大きくなる箇所を有することが好ましい。耐摩耗性と排水性とを高い次元で両立させることができるからである。 In the present invention, as in the embodiment shown in FIG. 1, it is preferable that at least one row has a portion where the shortest distance d1 (mm) increases from one side in the width direction to the other side. This is because both abrasion resistance and drainage can be achieved at a high level.
　本発明では、図１に示す実施形態にように、第１の側壁１２ｃは、第１の方向に隣接する２つのブロック１２のそれぞれの、最大の長さを有する側壁であることが好ましい。耐摩耗性をさらに向上させることができるからである。 In the present invention, as in the embodiment shown in FIG. 1, the first side wall 12c is preferably the side wall having the maximum length of each of the two blocks 12 adjacent in the first direction. This is because the wear resistance can be further improved.
　本発明では、図１、図２に示す実施形態にように、列を複数列有し、第１の方向とは異なる第２の方向に隣接する列間で隣接する２つのブロック１２が、互いに略平行に延在する、第１の側壁１２ｃとは別の第２の側壁１２ｄをそれぞれ有することが好ましい。耐摩耗性をより一層向上させることができるからである。 In the present invention, as in the embodiment shown in FIGS. 1 and 2, two blocks 12 having a plurality of columns and adjacent between columns adjacent in a second direction different from the first direction are connected to each other. It is preferable to have a second side wall 12d different from the first side wall 12c and extending substantially in parallel. This is because the wear resistance can be further improved.
　本発明では、図１に示す実施形態にように、第２の側壁間の最短距離をｄ２（ｍｍ）とするとき、最短距離ｄ２（ｍｍ）は、複数列のうち、前後方向の一方側の列から他方側の列に向かって大きくなる箇所を有することが好ましい。耐摩耗性と排水性とをより高い次元で両立させることができるからである。 In the present invention, as in the embodiment shown in FIG. 1, when the shortest distance between the second side walls is d2 (mm), the shortest distance d2 (mm) is one of the plurality of rows in the front-rear direction. It is preferable to have a portion that increases from the row to the other row. This is because the abrasion resistance and the drainage property can be compatible at a higher level.
　本発明では、図１に示す実施形態にように、底面１０の一部に、階段状のブロック１２ｂを有することが好ましい。耐摩耗性と排水性とをさらに高い次元で両立させることができるからである。 で は In the present invention, as in the embodiment shown in FIG. 1, it is preferable that a stepped block 12 b is provided on a part of the bottom surface 10. This is because both abrasion resistance and drainage can be achieved at a higher level.
　本発明では、図１、図２に示す実施形態のように、少なくとも一部のブロック１２が、ブロック１２の前後方向の両端から中央部に向かって、幅方向の幅が大きくなる箇所を有していることが好ましい。ブロック１２の剛性を増大させて、耐摩耗性をさらに向上させることができるからである。
　なお、ソールの底面１０のパターンでは、溝の溝壁及び溝底に、フッ素が塗布されていることが好ましい。溝の溝壁及び溝底にフッ素が塗布されていることによって、ソールの底面１０における排水性能を高めることができるからである。 In the present invention, as in the embodiment shown in FIGS. 1 and 2, at least a part of the block 12 has a portion where the width in the width direction increases from both ends in the front-rear direction of the block 12 toward the center. Is preferred. This is because the rigidity of the block 12 can be increased to further improve the wear resistance.
In the pattern of the bottom surface 10 of the sole, it is preferable that fluorine is applied to the groove wall and the groove bottom of the groove. This is because the drainage performance on the bottom surface 10 of the sole can be improved by applying fluorine to the groove wall and the groove bottom of the groove.
＜競技義足＞
　以下、本発明の競技義足用ソールが装着される競技義足について例示説明する。なお、上述したように、本発明の競技義足用ソールは、装着される競技義足の種類等は、特に限定されず、任意の既知のタイプのものに装着することができる。
　図３は、ソールが装着された状態の競技義足の一例を示す概略側面図である。競技義足１は、この例で板ばね状の足部２を有し、その先端側の接地域にソール３を装着する。なお、図示は省略しているが、足部２の基端部は、アダプタを介してソケットに接続され、ソケットに着用者の足の断端を収容することによって、着用者が義足を着用することができる。アダプタ及びソケットは、大腿義足、下腿義足等、足の断端位置に応じたものが用いられる。 <Sports prostheses>
Hereinafter, a prosthetic leg to which the sole for a prosthetic leg of the present invention is attached will be exemplified and described. In addition, as mentioned above, the kind and the like of the sports artificial leg to be mounted on the sole for the artificial artificial leg of the present invention are not particularly limited, and can be mounted on any known type.
FIG. 3 is a schematic side view showing an example of a sports prosthesis with a sole attached. The athletic prosthesis 1 has a leaf spring-shaped foot 2 in this example, and a sole 3 is attached to a contact area on the tip side thereof. Although not shown, the base end of the foot 2 is connected to a socket via an adapter, and the wearer wears a prosthesis by accommodating a stump of the wearer's foot in the socket. be able to. As the adapter and the socket, those according to the stump position of the foot, such as a thigh prosthesis and a lower leg prosthesis, are used.
　以下、この例では、競技義足１の高さ方向において、足部２がアダプタと接続される側を接続側といい、路面Ｓと接地する側を接地側という。また、競技義足１の爪先Ｔとは、足部２が接続側から延びて終端する最先の位置を指す。 Hereinafter, in this example, in the height direction of the prosthetic leg 1, the side where the foot 2 is connected to the adapter is referred to as a connection side, and the side which contacts the road surface S is referred to as a ground side. In addition, the toe T of the prosthetic leg 1 refers to the earliest position where the foot 2 extends from the connection side and ends.
　この例において、競技義足１の足部２は、接続側から接地側へ順に、直線部２ａ、爪先Ｔ側へ凸の曲線部２ｂ、足部前後方向の後側へ凸の湾曲部２ｃ、接地側に凹の曲線部２ｄ及び接地側に凸となる弧状に爪先Ｔ側に延びる接地部２ｅからなる。競技義足１の足部２は、少なくとも１つ（図示例では１つ）の湾曲部２ｃを介して、爪先Ｔ側へ板状に延びる形状を有している。 In this example, the foot portion 2 of the prosthetic foot 1 has a straight portion 2a, a curved portion 2b convex to the toe T side, a curved portion 2c convex rearward in the fore-aft direction, and a ground contact in order from the connection side to the ground side. It has a curved portion 2d concave on the side and a grounding portion 2e extending toward the toe T in an arc shape convex on the grounding side. The foot 2 of the athletic prosthesis 1 has a shape extending in a plate shape to the toe T side via at least one (one in the illustrated example) curved portion 2c.
　なお、足部２の材質は、特に限定されないが、強度及び軽量化の観点から、炭素繊維強化プラスチック等を用いることが好ましい。 The material of the foot 2 is not particularly limited, but it is preferable to use carbon fiber reinforced plastic or the like from the viewpoint of strength and weight reduction.
　接地部２ｅは、接地側に、爪先Ｔから曲線部２ｄ側へ弧状に延在する接地域２ｆを有し、この接地域２ｆにソール３が装着されている。接地域２ｆは、競技義足１を装着した装着者が直進走行動作を行った際に、路面Ｓと当接する全領域を指し、ソール３が装着された状態では、接地域２ｆは、ソール３を介して路面Ｓと当接する。 The ground contact portion 2e has a contact area 2f extending in an arc from the toe T to the curved section 2d side on the ground contact side, and the sole 3 is mounted on the contact area 2f. The contact area 2f indicates the entire area that comes into contact with the road surface S when the wearer wearing the artificial prosthesis 1 performs a straight running operation, and in the state where the sole 3 is attached, the contact area 2f Abuts on the road surface S via
　ソール３は、接地域２ｆの延在形状に従う形状を有している。また、ソール３の接地側が、底面１０である。図３に示すとおり、底面１０は、爪先Ｔ側から曲線部２ｄ側へ、弧Ｘ１及びＸ２が連なる形状を有している。この例では、弧Ｘ１と弧Ｘ２とは、互いに異なる曲率半径を有しているが、同じ曲率半径を有していてもよい。 The sole 3 has a shape that follows the extending shape of the contact area 2f. The ground side of the sole 3 is the bottom surface 10. As shown in FIG. 3, the bottom surface 10 has a shape in which the arcs X1 and X2 are continuous from the toe T side to the curved portion 2d side. In this example, the arcs X1 and X2 have different radii of curvature, but may have the same radius of curvature.
　また、底面１０は、競技義足１が装着され、装着者の直立状態における路面Ｓとの側面視での接点である点Ｃを通って、幅方向Ｗに延びる線を境界とする一方側と他方側で、異なる性能を備えている。この例では、点Ｃは、直立に至る際に最初に路面Ｓと接触する点である。すなわち、直立状態とは、競技義足１の装着者が、一方のみが義足の場合は義足を着用しない健常足で、両方が義足の場合は、一方の義足で体を支えた状態から、競技義足１を路面Ｓに降ろして最初に路面Ｓと接触した状態を指す。 Further, the bottom surface 10 has one side and the other bounded by a line extending in the width direction W through a point C, which is a point of contact with the road surface S in a side view when the wearer's prosthetic leg 1 is mounted and the wearer stands upright. On the side, have different performance. In this example, the point C is a point that first comes into contact with the road surface S when the vehicle stands upright. That is, the upright state means that the wearer of the prosthesis 1 is a healthy foot that does not wear a prosthesis when only one is a prosthesis, and the body is supported by one prosthesis when both are prostheses. 1 indicates a state where the vehicle 1 first comes down on the road surface S and comes into contact with the road surface S first.
１：競技義足、　２：足部、　３：ソール
１０：底面、　１１：溝
１２、１２ａ、１２ｂ：ブロック
１２ｃ：第１の側壁、　１２ｄ：第２の側壁、　１２ｅ：突出する部分
  1: Athletic prosthesis, 2: foot, 3: sole 10: bottom, 11: groove 12, 12a, 12b: block 12c: first side wall, 12d: second side wall, 12e: projecting portion

Claims (7)

  1. 　底面の少なくとも一部の領域に、溝により区画され、平面形状が六角形以上の多角形状である複数のブロックを有し、
    　平面視において、前記複数のブロックのうち、第１の方向に隣接する２つのブロック間の最短距離をｄ１とし、前記隣接する２つブロックのうち最大長さが大きい方の前記ブロックの最大長さをＬとするとき、関係式、
    ｄ１／Ｌ≦０．０６
    を満たすことを特徴とする、競技義足用ソール。     At least part of the area of the bottom surface is defined by grooves, and has a plurality of blocks each having a polygonal shape of a hexagon or more in plan view,
    In plan view, the shortest distance between two blocks adjacent in the first direction among the plurality of blocks is d1, and the maximum length of the longer one of the two adjacent blocks is the maximum length. Is L, the relational expression:
    d1 / L ≦ 0.06
    A sole for sports prostheses, characterized by satisfying the following.
  2. 　前記第１の方向に隣接する２つのブロックは、互いに略平行に延在する第１の側壁をそれぞれ有し、
    　前記複数のブロックが、前記第１の側壁が延在する方向に略直交する方向に並んでなす列を、少なくとも１列有する、請求項１に記載の競技義足用ソール。     The two blocks adjacent in the first direction each have a first side wall extending substantially parallel to each other,
    The athletic foot sole according to claim 1, wherein the plurality of blocks have at least one row arranged in a direction substantially perpendicular to a direction in which the first side wall extends.
  3. 　少なくとも１つの前記列において、前記最短距離ｄ１（ｍｍ）は、幅方向一方側から他方側に向かって大きくなる箇所を有する、請求項２に記載の競技義足用ソール。 The sole for athletic prosthesis according to claim 2, wherein in at least one of the rows, the shortest distance d1 (mm) has a portion that increases from one side in the width direction to the other side.
  4. 　前記第１の側壁は、前記第１の方向に隣接する２つのブロックのそれぞれの、最大の長さを有する側壁である、請求項２又は３に記載の競技義足用ソール。 The sole for a sports prosthesis according to claim 2, wherein the first side wall is a side wall having a maximum length of each of two blocks adjacent in the first direction.
  5. 　前記列を複数列有し、
    　前記第１の方向とは異なる第２の方向に隣接する列間で隣接する２つのブロックが、互いに略平行に延在する、前記第１の側壁とは別の第２の側壁をそれぞれ有する、請求項２～４のいずれか一項に記載の競技義足用ソール。     Having a plurality of said rows,
    Two blocks adjacent to each other between adjacent columns in a second direction different from the first direction have second side walls different from the first side walls, respectively, extending substantially in parallel with each other; The sole for athletic prosthesis according to any one of claims 2 to 4.
  6. 　前記第２の側壁間の最短距離をｄ２（ｍｍ）とするとき、
    　前記最短距離ｄ２（ｍｍ）は、前記複数列のうち、前後方向の一方側の列から他方側の列に向かって大きくなる箇所を有する、請求項５に記載の競技義足用ソール。     When the shortest distance between the second side walls is d2 (mm),
    The sole for athletic prosthesis according to claim 5, wherein the shortest distance d2 (mm) has a portion that increases from one row in the front-rear direction to the other row in the plurality of rows.
  7. 　前記底面の一部に、階段状のブロックを有する、請求項１～６のいずれか一項に記載の競技義足用ソール。
          The sole for athletic prosthesis according to any one of claims 1 to 6, wherein a stepped block is provided on a part of the bottom surface.
PCT/JP2019/028687 2018-07-24 2019-07-22 Sole for athletic prosthetic leg WO2020022275A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014104286A (en) * 2012-11-29 2014-06-09 Nisshin Rubber Kk Shoe sole
JP2015536762A (en) * 2012-12-04 2015-12-24 ナイキ イノベイト セー． フェー． Footwear products
JP2016150189A (en) * 2015-02-19 2016-08-22 美津濃株式会社 Sole system for artificial leg
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014104286A (en) * 2012-11-29 2014-06-09 Nisshin Rubber Kk Shoe sole
JP2015536762A (en) * 2012-12-04 2015-12-24 ナイキ イノベイト セー． フェー． Footwear products
JP2016150189A (en) * 2015-02-19 2016-08-22 美津濃株式会社 Sole system for artificial leg
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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