Shoe upper and shoe

Abstract

Provided are a shoe upper and a shoe that have good fittability to the instep side of a foot and are capable of inhibiting the depression of the heal at the time of coming into contact with the ground. The present invention relates to, in one or more embodiments, a shoe upper, and the upper includes an instep cover for covering an instep side of the foot, the instep cover has a structure in which a tongue portion and an instep cover main body are formed as a single body, and a center portion of the instep cover in a width direction is substantially unstretchable in a length direction of the foot. The present invention relates to a shoe in which the shoe upper is integrated with a sole.

What is claimed is: 
     
         1 . A shoe upper, the upper comprising:
 an instep cover for covering an instep side of a foot,   wherein the instep cover has a structure in which a tongue portion and an instep cover main body are formed as a single body, and   a center portion of the instep cover located in a width direction is substantially unstretchable in a length direction of the foot.   
     
     
         2 . The shoe upper according to  claim 1 ,
 wherein a tensile strength of the center portion of the instep cover located in a width direction when stretched by 10% is 50 N/mm 2  or more.   
     
     
         3 . The shoe upper according to  claim 1 ,
 wherein the instep cover is stretchable in a width direction of the foot.   
     
     
         4 . The shoe upper according to  claim 1 ,
 wherein the tongue portion continues to a tip of a toe.   
     
     
         5 . The shoe upper according to  claim 1 ,
 wherein the tongue portion is constituted by a warp knitted fabric that includes a non-elastic yarn and an elastic yarn.   
     
     
         6 . The shoe upper according to  claim 1 ,
 wherein different members in the instep cover are joined together through embroidery covering an end portion of at least one of the members.   
     
     
         7 . The shoe upper according to  claim 1   wherein the upper further comprises a plantar cover for covering the entire plantar side of the foot.   
     
     
         8 . The shoe upper according to  claim 2 ,
 wherein the instep cover is stretchable in a width direction of the foot.   
     
     
         9 . The shoe upper according to  claim 2 ,
 wherein the tongue portion continues to a tip of a toe.   
     
     
         10 . The shoe upper according to  claim 2 ,
 wherein the tongue portion is constituted by a warp knitted fabric that includes a non-elastic yarn and an elastic yarn.   
     
     
         11 . The shoe upper according to  claim 2 ,
 wherein different members in the instep cover are joined together through embroidery covering an end portion of at least one of the members.   
     
     
         12 . A shoe, the shoe comprising:
 a shoe upper and a sole,   wherein the upper comprises an instep cover for covering an instep side of a foot,   the instep cover has a structure in which a tongue portion and an instep cover main body are formed as a single body, and   a center portion of the instep cover located in a width direction is substantially unstretchable in a length direction of the foot, and   wherein the shoe upper is integrated with the sole.   
     
     
         13 . The shoe according to  claim 12 ,
 wherein a tensile strength of the center portion of the instep cover located in a width direction when stretched by 10% is 50 N/mm 2  or more.   
     
     
         14 . The shoe according to  claim 12 ,
 wherein the instep cover is stretchable in a width direction of the foot.   
     
     
         15 . The shoe according to  claim 12 ,
 wherein the tongue portion continues to a tip of a toe.   
     
     
         16 . The shoe according to  claim 12 ,
 wherein the tongue portion is constituted by a warp knitted fabric that includes a non-elastic yarn and an elastic yarn.   
     
     
         17 . The shoe according to  claim 12 ,
 wherein different members in the instep cover are joined together through embroidery covering an end portion of at least one of the members.   
     
     
         18 . The shoe according to  claim 12 ,
 wherein the upper further comprises a plantar cover for covering the entire plantar side of the foot.   
     
     
         19 . The shoe according to  claim 12 ,
 wherein a ground contact surface of the sole has a curved shape that protrudes downward at a forefoot portion, and, when, on a plantar contact surface of the sole, a position of a rearmost end of the plantar contact surface is the origin, a path length to a leading end of a tiptoe that is measured along the plantar contact surface is L, and in a state in which a heel bottom surface of the plantar contact surface is disposed in parallel to a horizontal plane, a sole thickness at a position Sh where a path length from the position of the rearmost end of the plantar contact surface is 0.16×L is h, a sole thickness at a position Sm2 where the path length is (0.3 to 0.5)×L is m2, a sole thickness at a position Sm1 (where Sm1 is disposed frontward of Sm2) where the path length is (0.4 to 0.6)×L is m1, and a sole thickness at a position Sf where the path length is 0.7×L is f, the following relational expressions (1) to (3) are satisfied,
     m 2≥ m 1  (1)
 
     m 1≥ f,   (2) and
 
     m 1≥ h,   (3) and
 
   when an angle formed by a line that connects the position Sm1 and the position Sh with a horizontal plane is θ1, a position where a vertical straight line drawn from the position Sm1 intersects with the ground contact surface of the sole is Sm1′, a position where a vertical straight line drawn from the position Sh intersects with the ground contact surface of the sole is Sh′, and an angle formed by a line that connects the position Sm1′ and the position Sh′ with a horizontal plane is θ2, θ2≥θ1 holds true.   
     
     
         20 . The shoe according to  claim 19 ,
 wherein the sum of the θ2 and the θ1 is 40 degrees or more.