Shoes
A shoe ( 34 ) of the present invention includes a sole ( 32 ) and an upper ( 33 ). The upper ( 33 ) is composed of a fabric having a knit structure, and contains fiber reinforcement portions ( 23, 24 , and 25 ) in predetermined portions of the upper ( 33 ) integrally. The fiber reinforcement portions ( 23, 24 , and 25 ) are formed of a float stitch with a plurality of float stitch yarns ( 19 ). The shoe of the present invention imparts a proper fit to a wearer's foot by forming the upper composed of the fabric having the knit structure that stretches properly. Also, in the case where the direction of foot force is suddenly changed while the sole contacts the ground, the shoe can hold the foot in desired predetermined positions by the fiber reinforcement portions situated in predetermined positions of the upper integrally. Thus, the present invention provides a shoe having proper holding properties while maintaining fitting properties.
1. A shoe comprising a sole and an upper,
wherein the upper is composed of fabric having knit structures, includes an area configured to cover a calcaneus portion of a user's foot to an area configured to cover a tiptoe portion of the user's foot, has a longitudinal axis extending from the area configured to cover the calcaneus portion to the area configured to cover the tiptoe portion, and comprises:
a base knit portion;
a first fiber reinforcement portion that is arranged in a position configured to cover a lower part of a lateral malleolus of the user's foot, a lower part of a medial malleolus of the user's foot, and an upper part of the calcaneus portion of the user's foot;
a second fiber reinforcement portion that is arranged in a position configured to cover from a first metatarsal bone of the user's foot to a fifth metatarsal bone of the user's foot; and
a third fiber reinforcement portion in a bottom of the upper, extending continuously along the longitudinal axis from the first fiber reinforcement portion to the second fiber reinforcement portion, and
wherein each of the first, second, and third fiber reinforcement portions comprises a float stitch including a plurality of float stitch yarns,
the second fiber reinforcement defines a first gap on a medial side of the upper and a second gap on a lateral side of the upper, the second fiber reinforcement portion converging respectively to close each of the first gap and the second gap on a top of the upper;
the first gap is positioned such that the second fiber reinforcement portion is configured to avoid an area of a head part of the first metatarsal bone when in use,
the second gap is positioned such that the second fiber reinforcement portion is configured to avoid an area of a head part of the fifth metatarsal bone when in use,
the area configured to cover the tiptoe portion is a base knit material,
the area configured to cover the calcaneus portion is the base knit material, and
the base knit material has a knit structure different from a knit structure of the first, second, and third fiber reinforcement portions.
2. The shoe according to claim 1 , wherein, when a strain ratio (stretch ratio) of a portion of the float stitch in a float stitch yarn direction is 1 (two times the length before measurement), a stress in the portion of the float stitch of any of the first fiber reinforcement portion and the second fiber reinforcement portion is 1.2 times or more greater than a stress in a portion of the base knit portion.
3. The shoe according to claim 1 , wherein the upper has a sock shape composed of the fabric having the knit structures, and the bottom of the upper is fixed to the sole without changing the sock shape.
4. The shoe according to claim 1 , further comprising a fourth fiber reinforcement portion that is arranged in a position configured to cover at least one part of each of cuneiform bones of the user's foot, a cuboid bone of the user's foot, and a navicular bone of the user's foot.
5. The shoe according to claim 4 , wherein the first fiber reinforcement portion and the fourth fiber reinforcement portion are joined to one another.