Shoe and method of manufacturing the same
A shoe 1 of the present invention includes an upper 2 made of a stretchable fabric. The stretchable fabric is integrated with a sole 3 in a state of being stretched. Further, a method of manufacturing the shoe 1 of the present invention is a method of manufacturing a shoe using a stretchable fabric for the upper 2 . The method includes steps of: producing an upper pattern using a last having a size smaller than that of the sole 3 as a base; producing the upper 2 with the stretchable fabric being stretched by stretching the upper pattern and fitting the upper pattern onto a last having a size that matches the sole 3 ; and integrating the upper 2 with the stretchable fabric being stretched with the sole 3.
1. A shoe comprising a sole and an upper,
at least a part of the upper including a stretchable fabric,
the stretchable fabric having a tensile elongation of 30 to 200% in a foot length direction and 5 to 100% in a foot width direction when examined under a load of 20 N/5 cm,
the upper being integrated with the sole with the stretchable fabric being stretched in a length direction of the shoe at a tensile rate of 10 to 40%,
the stretchable fabric being stretched in a length direction and a width direction of the shoe, and a ratio between a tensile rate in the length direction of the shoe and a tensile rate in the width direction of the shoe is 1.25 or more.
2. The shoe according to claim 1 , wherein the tensile rate in the width direction of the shoe is from 0 to 30%.
3. The shoe according to claim 1 , wherein the tensile rate in the length direction of the shoe is from 10 to 20% and the tensile rate in the width direction of the shoe is from 0 to 8%.
4. The shoe according to claim 1 , wherein the stretchable fabric is a double raschel warp knitted fabric.
5. The shoe according to claim 4 , wherein a constituent yarn of a back surface of the double raschel warp knitted fabric is a double yarn of a polyester yarn and an elastomeric polyurethane yarn.
6. The shoe according to claim 1 , wherein the stretchable fabric is used only for a portion of the upper corresponding to a forefoot portion, a tip part of the forefoot portion, or a base of toes.
7. A method of manufacturing a shoe using a stretchable fabric for an upper, wherein the method comprises steps of:
producing an upper pattern using a last having a size smaller than that of a sole as a base;
producing an upper with the stretchable fabric being stretched by stretching the upper pattern and fitting the upper pattern onto a last having a size that matches the sole; and
integrating the upper with the stretchable fabric being stretched with the sole, the stretchable fabric being stretched in a length direction of the shoe at a tensile rate of 10 to 40%,
the stretchable fabric having a tensile elongation of 30 to 200% in a foot length direction and 5 to 100% in a foot width direction when examined under a load of 20 N/5 cm,
the stretchable fabric is stretched in a length direction and a width direction of the shoe, and
a ratio between a tensile rate in the length direction of the shoe and a tensile rate in the width direction of the shoe is 1.25 or more.