Footwear

Abstract

Provided is a footwear capable of improving both static fit and dynamic fit. A footwear (1) includes a sole (5) and an upper (10), the upper (10) includes a restricting fabric portion (200) including an expansion and contraction strand and a restricting strand, and when a tensile load acts on the restricting fabric portion in a direction in which the expansion and contraction strand and the restricting strand are elongated, the restricting strand is expanded and contracted by the expansion and contraction strand and the restricting strand. The stretch-side resistance index is represented by the ratio of the amount of increase in tensile stress to the amount of increase in the elongation of the stretch strand, said stretch-side resistance index being within a range in which the elongation of the restricted fabric section (200) is greater than a specific value. In a range in which the elongation of the restricting fabric part (200) is greater than a specific value, a restricting-side resistance index, which is represented by a ratio of an increase in tensile stress to an increase in elongation of the restricting strand, is greater.

Description

[0001] This application is a divisional application of the Chinese patent application with application number 202080099115.4 and invention name “Footwear”. The filing date of the original application is March 31, 2020. Technical Field

[0002] The present disclosure relates to footwear. Background Art

[0003] In the past, there is known a kind of footwear including a shoe upper. For example, Japanese Patent Gazette No. 6302478 discloses a kind of footwear including a shoe upper and a shoe sole structure. The shoe upper includes a knitted element and an inlay strand. The inlay strand has a greater elongation resistance than the knitted element. That is, the inlay strand is less likely to elongate than the knitted element. The inlay strand is linked with a strap to improve the fit of the footwear.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent No. 6302478 Summary of the invention

[0007] Problems to be solved by the invention

[0008] In footwear, it is desired to improve both the fit of the foot when the foot is in the shoe (so-called static fit) and the followability of the foot during movement (so-called dynamic fit).

[0009] However, improving both static and dynamic fit is accompanied by difficulties. For example, when a shoe upper is formed using a strand with relatively high elasticity, although the static fit is improved, the dynamic fit is reduced due to the small elongation stress of the strand. On the other hand, when a shoe upper is formed using a strand with relatively high resilience, although the dynamic fit is improved, the pressure on the foot increases and the static fit is reduced.

[0010] An object of the present disclosure is to provide a footwear that can improve both static and dynamic fit.

[0011] Technical means of solving problems

[0012] The footwear of one aspect of the present disclosure is a footwear including a sole and an upper, the upper including a limiting fabric portion, the limiting fabric portion having a function of limiting elongation, the limiting fabric portion including: a stretch strand having stretchability; and a limiting strand having stretchability and limiting the elongation of the stretch strand, when a tensile load acts on the limiting fabric portion in a direction that causes the stretch strand and the limiting strand to elongate, compared with a stretch side resistance index represented by the ratio of an increase in tensile stress to an increase in elongation of the stretch strand within a range where the elongation of the limiting fabric portion is greater than a specific value, the limiting side resistance index represented by the ratio of an increase in tensile stress to an increase in elongation of the limiting strand within a range where the elongation of the limiting fabric portion is greater than a specific value is greater.

[0013] Effects of the Invention

[0014] According to the present disclosure, it is possible to provide footwear capable of improving both static fit and dynamic fit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a plan view schematically showing the footwear according to the first embodiment of the present disclosure.

[0016] Figure 2 yes Figure 1 Left side view of the footwear shown.

[0017] Figure 3 yes Figure 1 Right side view of the footwear shown.

[0018] Figure 4 This is a cross-sectional view schematically showing the structure of a restricting fabric portion configured as a woven fabric.

[0019] Figure 5 It is a rough representation of the tensile load acting on Figure 4 A cross-sectional view showing a state where the cloth portion is restricted.

[0020] Figure 6 This is a cross-sectional view schematically showing the structure of a restriction fabric portion formed as a knitted fabric.

[0021] Figure 7 It is a rough representation of the tensile load acting on Figure 6 A cross-sectional view showing a state where the cloth portion is restricted.

[0022] Figure 8 It is a graph showing the characteristics of the restricting fabric portion and the stretching fabric portion.

[0023] Fig. 9 yes Figure 1 An expanded view of an upper of the footwear shown.

[0024] Fig.10 Yes means Fig. 9 A plan view of a variation of the upper shown.

[0025] Fig.11 Yes means Fig. 9 A plan view of a variation of the upper shown.

[0026] Fig.12 2 is a development view of a shoe upper of a shoe according to a second embodiment of the present disclosure.

[0027] Fig.13 1 is a development view of a shoe upper of a shoe according to a third embodiment of the present disclosure.

[0028] Fig.14 4 is a development view of a shoe upper of a shoe according to a fourth embodiment of the present disclosure.

[0029] Fig.15 1 is a development view of a shoe upper of a shoe according to a fifth embodiment of the present disclosure.

[0030] Fig.16 1 is a development view of a shoe upper of a sixth embodiment of the present disclosure.

[0031] Explanation of symbols

[0032] 1: Footwear

[0033] 5: Sole

[0034] 10: Upper

[0035] 10h1: Plug

[0036] 10h2: The narrow mouth

[0037] 11: Inner foot covering part

[0038] 12: Outer foot covering part

[0039] 21: First stretch strand

[0040] 22: Second stretch strand

[0041] 23: Restricted Strands

[0042] 23a: Flaccid

[0043] 100: Non-stretchable fabric part

[0044] 110: Front non-retractable part

[0045] 111: Inner non-stretchable part

[0046] 112: Outer non-elastic part

[0047] 113: Front non-retractable part

[0048] 120: Rear non-retractable part

[0049] 130: Inner foot non-stretchable part

[0050] 140: Non-retractable outer foot

[0051] 200: Restricted fabric part

[0052] 210: Inner foot restriction

[0053] 220: External foot restriction

[0054] 230: Pin limiter

[0055] 240: Front restriction

[0056] 241: First inner restriction portion

[0057] 242: Second inner restriction portion

[0058] 243: First outer limiting portion

[0059] 244: Second outer limiting portion

[0060] 250: Central Restriction

[0061] R1: Forefoot area

[0062] R2: Rearfoot area

[0063] R3: Midfoot area DETAILED DESCRIPTION

[0064] The embodiments of the present disclosure are described with reference to the accompanying drawings. In addition, in the drawings referred to below, the same or equivalent components are marked with the same numbers. In the following description, terms such as length direction, width direction, front, and rear are used. These terms indicating directions indicate directions observed from the viewpoint of a wearer wearing the footwear 1 placed on a flat surface such as the ground. For example, the front refers to the toe side, and the rear refers to the heel side. Moreover, the inner foot side refers to the inner side of the foot in the width direction (the first toe side of the foot), and the outer foot side refers to the outer side of the foot in the width direction.

[0065] (First Embodiment)

[0066] Figure 1 It is a plan view schematically showing the footwear according to the first embodiment of the present disclosure. Figure 2 yes Figure 1 Left side view of the footwear shown. Figure 3 yes Figure 1 The right side view of the footwear shown. In addition, Figure 1 to Figure 3, the footwear 1 for the left foot is shown, but the footwear 1 can also be applied to the right foot, in which case it is symmetrical with the footwear 1 for the left foot. The footwear 1 of this embodiment can be used as a sports shoe or a walking shoe, for example, regardless of the purpose of the footwear.

[0067] like Figure 1 to Figure 3 As shown, the footwear 1 comprises a sole 5 and an upper 10 .

[0068] The upper 10 is connected to the sole 5, and forms a space for accommodating the foot together with the sole 5. The upper 10 includes an inner foot covering portion 11, an outer foot covering portion 12, a foot insert portion 10h1, and a throat portion 10h2.

[0069] The inner foot cover 11 is a portion that covers at least a portion of the inner foot surface of the foot. The inner foot cover 11 includes the inner side ( Figure 1 In addition, the center line A may not be the center line of the footwear 1 in the width direction, but may be a line connecting the center of the calcaneus of a standard wearer's foot and a position corresponding to a line passing between the first toe and the second toe of the foot in the footwear 1. Furthermore, the inside and the outside are defined based on the center line of the footwear 1 in the width direction, but this is not strict.

[0070] The outer foot covering portion 12 is a portion that covers at least a portion of the outer foot surface of the foot. The outer foot covering portion 12 includes the outer side of the center line A in the upper 10 ( Figure 1 .

[0071] The foot insert portion 10h1 is provided between the inner foot cover portion 11 and the outer foot cover portion 12 in the width direction of the footwear 1 and is a portion that allows the foot to enter and exit.

[0072] The narrow opening 10h2 is an opening extending forward from the leg portion 10h1 in the longitudinal direction of the shoe 1. The narrow opening 10h2 is provided in the midfoot region R3. The midfoot region R3 is a region located between the forefoot region R1 located in the front in the longitudinal direction of the shoe 1 and the rearfoot region R2 located in the rear in the longitudinal direction of the shoe 1.

[0073] The forefoot region R1 is a region located in a range of about 0% to 30% from the front end portion toward the rear end portion of the footwear 1 relative to the total length of the footwear 1. The midfoot region R3 is a region located in a range of about 30% to 80% from the front end portion toward the rear end portion of the footwear 1 relative to the total length of the footwear 1. The rearfoot region R2 is a region located in a range of 80% to 100% from the front end portion toward the rear end portion of the footwear 1 relative to the total length of the footwear 1.

[0074] like Figure 1 to Figure 3As shown in FIG. 1 , the instep 10 includes a non-stretchable fabric portion 100 and a restriction fabric portion 200. Hereinafter, the restriction fabric portion 200 will be described first. In each of the drawings, a dotted pattern is attached to the restriction fabric portion 200.

[0075] The limiting fabric portion 200 has stretchability within a certain range and has a function of limiting elongation within a range larger than the range. Figures 4 to 7 As shown, the restriction fabric portion 200 includes a stretch yarn 21, a stretch yarn 22, and a restriction yarn 23. The stretch yarn 21, the stretch yarn 22, and the restriction yarn 23 are integrally formed. The restriction fabric portion 200 may be formed as a woven fabric or a knitted fabric. Figure 4 and Figure 5 FIG. 2 shows the structure of the restriction fabric portion 200 formed as a woven fabric. Figure 6 and Figure 7 2 shows the structure of the restriction fabric portion 200 formed as a knitted fabric.

[0076] The stretch strands 21 and 22 include a first stretch strand 21 and a second stretch strand 22. Each stretch strand 21 and 22 is stretchable. The first stretch strand 21 and the second stretch strand 22 may include the same strands or different strands. Figures 4 to 7 In order to easily distinguish the first elastic strand 21 and the second elastic strand 22, the first elastic strand 21 is indicated by a dotted line and the second elastic strand 22 is indicated by a dashed line.

[0077] The limiting strand 23 is elastic and has the function of limiting the elongation of each of the elastic strands 21 and 22. Specifically, Figure 5 or Figure 7 As shown, when the tensile load acts on the limiting fabric portion 200 in the direction of stretching the stretch strands 21, 22 and limiting strands 23, the limiting side resistance index within the range where the elongation of the limiting fabric portion 200 is greater than a specific value is greater than the stretch side resistance index within the range where the elongation of the limiting fabric portion 200 is greater than a specific value.

[0078] The stretch side resistance index is expressed as the ratio of the increase in tensile stress to the increase in elongation of the stretch strands 21 and 22. The restriction side resistance index is expressed as the ratio of the increase in tensile stress to the increase in elongation of the restriction strand 23.

[0079] In this embodiment, if Figures 4 to 7As shown, the limiting strand 23 has a slack portion 23a, and the slack portion 23a is in a slack state within a range where the elongation of the limiting fabric portion 200 is less than the specific value. The slack portion 23a is in a fully extended state within a range where the elongation of the limiting fabric portion 200 is greater than the specific value. Thus, the limiting side resistance index within a range where the elongation of the limiting fabric portion 200 is greater than the specific value is greater than the stretch side resistance index.

[0080] In the present embodiment, the specific value is set to 25%. That is, the slack portion 23a is in a fully extended state when the elongation rate of the restriction fabric portion 200 reaches 25%. However, the specific value is not limited to 25%. The specific value is set to 25% because it is found that when the footwear 1 is worn and moved, the restriction fabric portion 200 generates a tensile stress that causes the elongation rate of the restriction fabric portion 200 to reach approximately 25%. That is, the specific value is set based on the tensile stress generated by the restriction fabric portion 200 during movement.

[0081] Here, refer to Figure 8 The characteristics of the regulating cloth portion 200 will be described. Figure 8 The results of tensile tests on the restricting fabric portion 200 and a stretch fabric portion as a comparative example are shown. The stretch fabric portion is composed of only the first stretch strands 21 and the second stretch strands 22 .

[0082] like Figure 8 As shown, the ratio (slope) of the increase in tensile stress to the increase in elongation of each stretch strand 21, 22 is substantially constant regardless of the range of the elongation of the stretch fabric portion.

[0083] On the other hand, the restriction fabric portion 200 exhibits the same characteristics as the stretch fabric portion in the range of elongation of 25% or less, and the restriction side resistance index is greater than the stretch side resistance index in the range of elongation of more than 25%. This is because when the elongation of the restriction fabric portion 200 exceeds 25%, the slack portion 23a is in a fully stretched state. That is, the slack portion 23a does not substantially contribute to the value of the tensile stress in the range of elongation of 25% or less.

[0084] As described above, within the range where the elongation of the limiting fabric portion 200 is less than 25%, since the limiting fabric portion 200 depends on the stretch strands 21 and 22 to extend, the limiting side resistance index is substantially equal to the stretch side resistance index. Within the range where the elongation of the limiting fabric portion 200 is greater than 25%, since the slack portion 23a is fully extended, the limiting strand 23 limits the elongation of the stretch strands 21 and 22, and therefore the limiting side resistance index is greater than the stretch side resistance index.

[0085] Secondly, refer to Fig. 9, the configuration of the restriction cloth portion 200 of this embodiment will be described. Fig. 9 As shown in FIG. 1 , the restriction fabric portion 200 is disposed on the side of the narrow opening 10 h 2 , that is, in the midfoot region R 3 . Specifically, the restriction fabric portion 200 includes an inner foot restriction portion 210 and an outer foot restriction portion 220 .

[0086] The inner foot restraint portion 210 is disposed at a location on the side of the narrow opening 10h2 in the inner foot covering portion 11. The inner foot restraint portion 210 has a shape extending from the edge of the narrow opening 10h2 to the sole 5 in the width direction.

[0087] The outer foot restraint portion 220 is disposed at a location on the side of the narrow opening 10h2 in the outer foot covering portion 12. The outer foot restraint portion 220 has a shape extending from the edge of the narrow opening 10h2 to the sole 5 in the width direction.

[0088] In the inner foot restraining portion 210 and the outer foot restraining portion 220 , the stretch strands 21 , 22 , and the restraining strands 23 are arranged so as to extend in the width direction.

[0089] Next, the non-stretch fabric portion 100 will be described. The non-stretch fabric portion 100 includes a non-stretch strand having an elongation that is less than or equal to the elongation of the limiting strand 23. Therefore, when a tensile load acts on the non-stretch fabric portion 100 in a direction that causes the non-stretch strand to elongate, the non-stretch side resistance index represented by the ratio of the increase in tensile stress to the increase in elongation of the non-stretch fabric portion 100 is greater than or equal to the limiting side resistance index within the range where the elongation is greater than or equal to the specific value.

[0090] In this embodiment, the non-stretch strands include the limiting strands 23 in a fully stretched state. Therefore, the stretch side resistance index is equal to the limiting side resistance index in the range where the elongation is greater than or equal to the specific value.

[0091] The non-stretchable fabric portion 100 includes a front non-stretchable portion 110 and a rear non-stretchable portion 120 .

[0092] The front non-elastic portion 110 is arranged in front of the narrow mouth portion 10h2, the inner foot restraint portion 210 and the outer foot restraint portion 220. Specifically, the front non-elastic portion 110 is arranged in the entire area ranging from the front end of the narrow mouth portion 10h2, the front end of the inner foot restraint portion 210 and the front end of the outer foot restraint portion 220 to the front end of the upper 10.

[0093] The rear non-elastic portion 120 is disposed behind the inner foot restraint portion 210 and the outer foot restraint portion 220. Specifically, the rear non-elastic portion 120 is disposed in the entire region from the rear end of the inner foot restraint portion 210 and the rear end of the outer foot restraint portion 220 to the rear end of the upper 10.

[0094] In the front non-elastic portion 110 and the rear non-elastic portion 120 , the non-elastic strands are arranged so as to extend in the width direction.

[0095] As described above, in the footwear 1 of the present embodiment, in the static state in which the foot is inserted into the footwear 1, the elastic force of the elastic strands 21 and 22 causes the upper 10 to follow the foot, thereby improving the static fit. Furthermore, when the footwear 1 is worn, the restriction fabric portion 200 generates a tensile stress in which the elongation of the restriction fabric portion 200 becomes a specific value (about 25%), but within the range in which the elongation of the restriction fabric portion 200 exceeds the specific value, the restriction strand 23 restricts the elongation of the elastic strand 21 and 22, in other words, the shaking of the foot in the footwear 1 is suppressed, thereby improving the dynamic fit. The above situation is particularly significant in the midfoot region R3.

[0096] In addition, in the embodiment described, Fig.10 As shown, the inner foot restricting portion 210 may be omitted and the entire area of ​​the inner foot covering portion 11 may be formed of the non-stretchable fabric portion 100. That is, the non-stretchable fabric portion 100 may include the inner foot non-stretchable portion 130 having a shape extending from the edge of the narrow opening 10h2 to the sole 5 in the width direction.

[0097] Furthermore, the outer foot restraining portion 220 may have a shape extending outward from the edge of the narrow opening 10h2 along the width direction to at least the center of the narrow opening 10h2 and the sole 5. Fig.11 As shown, the outer edge of the outer foot restraining portion 220 in the width direction may be separated from the sole 5. In this case, the non-stretch fabric portion 100 is arranged at the outer side of the outer foot restraining portion 220 in the outer foot covering portion 12. That is, the non-stretch fabric portion 100 may have an outer foot non-stretch portion 140 arranged at the outer side of the outer foot restraining portion 220 in the outer foot covering portion 12. The outer edge of the outer foot restraining portion 220 preferably reaches a position that covers at least the portion that protrudes to the outermost side of the wearer's foot. That is, the outer edge of the outer foot restraining portion 220 is preferably at a position that covers at least the portion that protrudes to the outermost side of the wearer's foot when viewed from above (equivalent to Figure 1 ) down to the position corresponding to the contour line of the outer foot side.

[0098] (Second Embodiment)

[0099] Next, refer to Fig.12 The upper 10 of the footwear 1 according to the second embodiment of the present disclosure will be described. In the second embodiment, only the parts different from the first embodiment will be described, and the description of the same structure, function and effect as the first embodiment will not be repeated.

[0100] In this embodiment, the inner foot restraint 210 has a shape extending from the rear of the throat 10h2 to the sole 5 in the width direction. The outer foot restraint 220 has a shape extending from the front of the throat 10h2 to the sole 5 in the width direction.

[0101] The non-stretchable fabric portion 100 further includes an inner foot non-stretchable portion 130 and an outer foot non-stretchable portion 140 .

[0102] The inner foot non-elastic portion 130 is disposed on the side of the narrow opening 10h2 and in front of the inner foot restricting portion 210. The inner foot non-elastic portion 130 has a shape extending from the front portion of the narrow opening 10h2 to the sole 5 in the width direction.

[0103] The outer foot non-elastic portion 140 is disposed on the side of the narrow opening 10h2 and behind the outer foot restricting portion 220. The outer foot non-elastic portion 140 has a shape extending from the rear of the narrow opening 10h2 to the sole 5 in the width direction.

[0104] In the above embodiment, since the restricting fabric portion 200 is disposed at a location where wrinkles are likely to occur when the instep 10 is bent, wrinkles are suppressed from occurring at the location when the instep 10 is bent. Therefore, the fit to the foot during movement is improved.

[0105] (Third Embodiment)

[0106] Next, refer to Fig.13 The third embodiment of the present disclosure will be described with respect to the upper 10 of the footwear 1. In the third embodiment, only the parts different from the first embodiment will be described, and the description of the same structure, function and effect as the first embodiment will not be repeated.

[0107] In this embodiment, the restriction fabric portion 200 includes a pin restriction portion 230. The pin restriction portion 230 is disposed around the pin portion 10h1.

[0108] The portion of the upper 10 other than the foot-inserting restriction portion 230 includes the non-stretchable fabric portion 100. That is, the non-stretchable fabric portion 100 includes the front non-stretchable portion 110, the rear non-stretchable portion 120, the inner foot non-stretchable portion 130, and the outer foot non-stretchable portion 140. The boundary between the foot-inserting restriction portion 230 and the inner foot non-stretchable portion 130, and the boundary between the foot-inserting restriction portion 230 and the outer foot non-stretchable portion 140 are preferably set near the positions corresponding to the lower edges of the inner and outer ankles of the wearer's foot, respectively. In this case, the height of the boundary on the inner foot side may be different from the height of the boundary on the outer foot side.

[0109] In the above-described embodiment, the static fit and dynamic fit of the leg of the pin portion 10h1 are improved.

[0110] (Fourth Embodiment)

[0111] Next, refer to Fig.14 The shoe upper 10 of the footwear 1 according to the fourth embodiment of the present disclosure will be described. In the fourth embodiment, only the parts different from the first embodiment will be described, and the description of the same structure, function and effect as the first embodiment will not be repeated.

[0112] In the present embodiment, the restriction fabric portion 200 includes a front restriction portion 240. The front restriction portion 240 is disposed in front of the throat portion 10h2 and includes a front end portion of the throat portion 10h2. The front restriction portion 240 has a shape extending in the width direction.

[0113] In the above-described embodiment, since the restricting fabric portion is arranged at the portion of the shoe upper corresponding to the MP joint of the foot, the generation of wrinkles at the portion when the shoe upper is bent is suppressed.

[0114] (Fifth Embodiment)

[0115] Next, refer to Fig.15 A fifth embodiment of the present disclosure will be described with respect to the upper 10 of the footwear 1. In the fifth embodiment, only the parts different from the first embodiment will be described, and the description of the same structure, function, and effect as the first embodiment will not be repeated.

[0116] In this embodiment, the restriction fabric portion 200 does not include the inner foot restriction portion 210 and the outer foot restriction portion 220, but includes a front restriction portion 240. The front restriction portion 240 is disposed in front of the narrow mouth portion 10h2 and includes a position of the front end portion of the narrow mouth portion 10h2. The front restriction portion 240 includes a first inner restriction portion 241, a second inner restriction portion 242, a first outer restriction portion 243, and a second outer restriction portion 244.

[0117] The first inner restricting portion 241 has a plurality of inner restricting portions 241 extending from the front end of the narrow opening 10h2 toward the inner side in the width direction ( Fig.15 The first inner limiting portion 241 has a shape that increases in length ( Fig.15 The shape in which the length (in the front-to-back direction) gradually decreases.

[0118] The second inner restricting portion 242 has a shape extending from the inner end of the first inner restricting portion 241 in the width direction and the front end of the first inner restricting portion 241 as it moves toward the inner side in the width direction so as to be separated from the first inner restricting portion 241. The second inner restricting portion 242 has a shape in which the length in the longitudinal direction gradually decreases as it moves toward the inner side in the width direction.

[0119] The first outer limiting portion 243 has a plurality of outer portions extending from the front end portion of the narrow opening 10h2 toward the outer side in the width direction ( Fig.15 The first outer limiting portion 243 has a shape in which the length in the longitudinal direction gradually decreases toward the outer side in the width direction.

[0120] The second outer limiting portion 244 has a shape extending from the inner end of the first outer limiting portion 243 in the width direction and the front end of the first outer limiting portion 243 toward the outer side in the width direction so as to be separated from the first outer limiting portion 243. The second outer limiting portion 244 has a shape in which the length in the longitudinal direction gradually decreases toward the outer side in the width direction.

[0121] The non-stretchable fabric portion 100 further includes an inner foot non-stretchable portion 130 and an outer foot non-stretchable portion 140. The structures of the inner foot non-stretchable portion 130 and the outer foot non-stretchable portion 140 are the same as those of the third embodiment.

[0122] In the present embodiment, the front non-elastic portion 110 includes an inner non-elastic portion 111 , an outer non-elastic portion 112 , and a front non-elastic portion 113 .

[0123] The inner non-elastic portion 111 is disposed between the first inner restricting portion 241 and the second inner restricting portion 242 .

[0124] The outer non-elastic portion 112 is disposed between the first outer limiting portion 243 and the second outer limiting portion 244 .

[0125] The front end non-elastic portion 113 is disposed between the second inner limiting portion 242 and the second outer limiting portion 244 .

[0126] In the above-described embodiment, both the dynamic fit when a load acts on the instep upper 10 at various angles and the rigidity of the portion of the instep upper 10 in front of the narrow opening 10h2 are ensured.

[0127] (Sixth Embodiment)

[0128] Next, refer to Fig.16 A sixth embodiment of the present disclosure will be described with respect to the upper 10 of the footwear 1. In the sixth embodiment, only the parts different from the first embodiment will be described, and the description of the same structure, function, and effect as the first embodiment will not be repeated.

[0129] In this embodiment, the shoe upper 10 includes the inner foot cover 11, the outer foot cover 12, and the foot insert 10h1, but does not include the throat 10h2. That is, the shoe upper 10 in the above embodiment has a so-called sock-like structure.

[0130] The restriction fabric portion 200 includes a central restriction portion 250 disposed in front of the pin portion 10h1. The central restriction portion 250 has a shape extending forward from the front end portion of the pin portion 10h1.

[0131] The non-stretchable fabric portion 100 includes an inner foot non-stretchable portion 130 and an outer foot non-stretchable portion 140 .

[0132] The inner foot non-elastic portion 130 is disposed on the side of the central restriction portion 250 in the inner foot covering portion 11. The front non-elastic portion 110, the inner foot non-elastic portion 130, and the rear non-elastic portion 120 are continuously connected along the longitudinal direction.

[0133] The outer foot non-elastic portion 140 is disposed on the side of the central restriction portion 250 in the outer foot covering portion 12. The front non-elastic portion 110, the outer foot non-elastic portion 140, and the rear non-elastic portion 120 are continuously connected along the length direction.

[0134] The embodiments disclosed this time should be considered as illustrative in all aspects and not restrictive. The scope of the present invention is indicated by the scope of the claims rather than the description of the embodiments, and includes all modifications within the meaning and scope equivalent to the scope of the claims.

[0135] For example, in the first to fifth embodiments, the narrow opening 10h2 may be omitted so that the upper 10 includes a so-called sock structure. In this case, the positions of the inner foot restriction portion 210, the outer foot restriction portion 220, and the front restriction portion 240 provided around the narrow opening 10h2 are the same as those in the case where the narrow opening 10h2 is provided.

[0136] [form]

[0137] Those skilled in the art will appreciate that the above-described multiple exemplary embodiments are specific examples of the following forms.

[0138] The footwear 1 of one aspect of the present disclosure is a footwear 1 including a sole 5 and an upper 10, wherein the upper 10 includes a limiting fabric portion 200 having a function of limiting elongation, wherein the limiting fabric portion 200 includes a stretchable stretch strand 21, a stretch strand 22, and a stretchable limiting strand 23 that limits the elongation of the stretch strand. When a tensile load acts on the limiting fabric portion in a direction that causes the stretch strand and the limiting strand to elongate, the limiting side resistance index represented by the ratio of the increase in the tensile stress to the increase in the elongation of the stretch strand 21 and the stretch strand 22 within a range where the elongation of the limiting fabric portion 200 is greater than a specific value is greater than the stretch side resistance index represented by the ratio of the increase in the tensile stress to the increase in the elongation of the stretch strand 21 and the stretch strand 22 within a range where the elongation of the limiting fabric portion 200 is greater than a specific value.

[0139] In the above-mentioned footwear, in a static state where the foot wears the above-mentioned footwear, the stretching force of the stretch strand makes the upper follow the foot, thereby improving the static fit. Furthermore, when the footwear is worn, the above-mentioned restriction fabric portion generates a tensile stress in which the elongation rate of the restriction fabric portion becomes a specific value, but within the range of the tensile stress in which the elongation rate of the restriction fabric portion is greater than the specific value, the restriction strand restricts the elongation of the stretch strand, in other words, the shaking of the foot in the footwear is suppressed, thereby improving the dynamic fit.

[0140] Moreover, it is preferred that the limiting strand 23 has a slack portion 23a, and the slack portion 23a is in a relaxed state within a range where the elongation of the limiting fabric portion is below a specific value, and the slack portion 23a is in a fully extended state within a range where the elongation of the limiting fabric portion is greater than a specific value, whereby the limiting side resistance index within a range where the elongation of the limiting fabric portion is greater than a specific value is greater than the stretch side resistance index.

[0141] In the above-described form, the above-described effects can be effectively obtained.

[0142] Furthermore, it is preferable that the stretch strands 21, 22, and the restricting strands 23 are integrally formed.

[0143] Moreover, the upper 10 preferably comprises: an inner foot covering portion 11, which covers at least a portion of the inner foot surface of the foot; an outer foot covering portion 12, which covers at least a portion of the outer foot surface of the foot; a foot insertion portion 10h1, which is arranged between the inner foot covering portion and the outer foot covering portion in the width direction of the footwear to allow the foot to enter and exit; and a narrow mouth portion 10h2, which extends from the foot insertion portion to the front in the length direction of the footwear.

[0144] The limiting fabric portion 200 may be disposed on a side of the narrow opening.

[0145] For example, the limiting fabric portion 200 may have an outer foot limiting portion 220, which is arranged on the side of the narrow portion in the outer foot covering portion 12, and the outer foot limiting portion 220 extends outward from the edge of the narrow portion along the width direction to at least the shape of the narrow portion and the central portion of the sole.

[0146] In the above-described embodiment, the restricting fabric portion is disposed at the relatively greatly raised portion of the instep, so that the fit of the upper to the foot is improved.

[0147] Alternatively, the restriction fabric portion 200 may include an inner foot restriction portion 210 disposed at a position on the side of the narrow opening portion of the inner foot covering portion 11, and an outer foot restriction portion 220 disposed at a position on the side of the narrow opening portion of the outer foot covering portion. The inner foot restriction portion 210 has a shape extending from the rear portion of the narrow opening portion along the width direction to the sole, and the outer foot restriction portion 220 has a shape extending from the front portion of the narrow opening portion along the width direction to the sole.

[0148] In the above embodiment, since the restricting fabric portion is arranged at the portion where wrinkles are likely to occur when the shoe upper is bent, the occurrence of wrinkles at the portion when the shoe upper is bent is suppressed. Therefore, the fit to the foot during movement is improved.

[0149] Furthermore, the restriction fabric portion 200 may include a pin restriction portion 230 disposed around the pin portion.

[0150] In this aspect, the static fit and dynamic fit of the leg in the pin portion are improved.

[0151] Furthermore, the restriction fabric portion 200 may include a front restriction portion 240 disposed in front of the narrow opening portion and including a front end portion of the narrow opening portion, and the front restriction portion 240 may have a shape extending along the width direction.

[0152] In the above-described embodiment, since the restricting fabric portion is arranged at the portion of the shoe upper corresponding to the MP joint of the foot, the generation of wrinkles at the portion when the shoe upper is bent is suppressed.

[0153] In the above case, the upper 10 may further include a non-stretch fabric portion 100 including a non-stretch strand having an elongation less than or equal to that of the limiting strand 23. When a tensile load acts on the non-stretch fabric portion 100 in a direction that causes the non-stretch strand to elongate, a non-stretch side resistance index represented by a ratio of an increase in tensile stress to an increase in elongation of the non-stretch fabric portion is greater than or equal to the limiting side resistance index within a range where the elongation is greater than or equal to the specific value. The non-stretch fabric portion 100 preferably includes a front non-stretch portion 110 disposed in front of the front limiting portion 240.

[0154] Furthermore, the limiting fabric portion 200 may include a front limiting portion 240, which is arranged in front of the narrow mouth portion and includes a position of a front end portion of the narrow mouth portion, and the front limiting portion 240 includes: a first inner limiting portion 241, which has a shape extending forward from the front end portion of the narrow mouth portion as it extends toward the inside in the width direction; a second inner limiting portion 242, which has a shape extending from the inner end of the first inner limiting portion in the width direction and the front end portion of the first inner limiting portion as it extends toward the inside in the width direction in a manner separated from the first inner limiting portion; a first outer limiting portion 243, which has a shape extending forward from the front end portion of the narrow mouth portion as it extends toward the outside in the width direction; and a second outer limiting portion 244, which has a shape extending from the inner end of the first outer limiting portion in the width direction and the front end portion of the first outer limiting portion as it extends toward the outside in the width direction in a manner separated from the first outer limiting portion.

[0155] In this configuration, a dynamic fit is ensured when loads act at various angles relative to the upper.

[0156] In the case, preferably, the first inner limiting portion 241 has a shape in which the length in the longitudinal direction gradually decreases toward the inner side in the width direction, the second inner limiting portion 242 has a shape in which the length in the longitudinal direction gradually decreases toward the inner side in the width direction, the first outer limiting portion 243 has a shape in which the length in the longitudinal direction gradually decreases toward the outer side in the width direction, and the second outer limiting portion 244 has a shape in which the length in the longitudinal direction gradually decreases toward the outer side in the width direction.

[0157] Moreover, the upper 10 may further include a non-stretch fabric portion 100, the non-stretch fabric portion 100 including a non-stretch strand having an elongation less than or equal to the elongation of the limiting strand, a non-stretch side resistance index represented by a ratio of an increase in tensile stress to an increase in elongation of the non-stretch fabric portion when a tensile load acts on the non-stretch fabric portion in a direction in which the non-stretch strand is elongated is greater than the limiting side resistance index within a range in which the elongation is greater than or equal to the specific value, and the non-stretch fabric portion 100 includes: an inner non-stretch portion 111, arranged between the first inner limiting portion and the second inner limiting portion; an outer non-stretch portion 112, arranged between the first outer limiting portion and the second outer limiting portion; and a front end non-stretch portion 113, arranged between the second inner limiting portion and the second outer limiting portion.

[0158] In this aspect, both the dynamic fit when a load acts on the upper at various angles and the rigidity of the portion of the upper in front of the narrow opening are ensured.

[0159] Moreover, the shoe upper may include: an inner foot covering portion, covering at least a portion of the inner foot surface of the foot; an outer foot covering portion, covering at least a portion of the outer foot surface of the foot; and a foot insertion portion, which is arranged between the inner foot covering portion and the outer foot covering portion in the width direction of the footwear to allow the foot to enter and exit, and the restriction fabric portion 200 has a central restriction portion 250, which is arranged in front of the foot insertion portion, and the shoe upper 10 also includes a non-stretch fabric portion 100, which includes a non-stretch fabric portion 100 having an elongation less than the elongation of the restriction strand. The non-stretch side resistance index represented by the ratio of the increase in tensile stress to the increase in elongation of the non-stretch fabric portion when a tensile load acts on the non-stretch fabric portion in a direction in which the non-stretch strand is extended is greater than the restriction side resistance index within a range in which the elongation is greater than or equal to the specific value, and the non-stretch fabric portion 100 comprises: an inner foot non-stretch portion 130, which is arranged on the side of the central restriction portion in the inner foot covering portion; and an outer foot non-stretch portion 140, which is arranged on the side of the central restriction portion in the outer foot covering portion.

Claims

1. A pair of shoes comprising a sole and an upper, The shoe upper includes a limiting fabric portion, and the limiting fabric portion has a function of limiting elongation. The limiting cloth portion comprises: Stretch strands, which are stretchable; and The limiting strand is elastic and limits the elongation of the elastic strand. When a tensile load acts on the limiting fabric portion in a direction in which the stretch strand and the limiting strand are stretched, a limiting side resistance index represented by a ratio of an increase in tensile stress to an increase in elongation of the stretch strand within a range in which the elongation of the limiting fabric portion is greater than a specific value is greater than a stretch side resistance index represented by a ratio of an increase in tensile stress to an increase in elongation of the stretch strand within a range in which the elongation of the limiting fabric portion is greater than a specific value. The limiting fabric portion is made of a woven fabric formed by weaving the stretch yarn and the limiting yarn.

2. The footwear according to claim 1, wherein The limiting strand has a slack portion, and the slack portion is in a slack state within a range where the elongation of the limiting fabric portion is less than a specific value. The slack portion is in a fully extended state within a range where the elongation of the limiting fabric portion is greater than a specific value, whereby the limiting side resistance index within a range where the elongation of the limiting fabric portion is greater than a specific value is greater than the stretching side resistance index.

3. The footwear of claim 1 or 2, wherein the stretch strand is integrally formed with the restraining strand.

4. The footwear according to any one of claims 1 to 3, wherein The shoe upper has: An inner foot covering portion covering at least a portion of the inner foot surface of the foot; An outer foot covering portion covering at least a portion of the outer foot surface of the foot; a foot insertion portion, provided between the inner foot covering portion and the outer foot covering portion in the width direction of the footwear, to allow the foot to enter and exit; and The narrow opening extends from the leg portion forward in the longitudinal direction of the footwear. The footwear according to claim 4 , wherein the restricting fabric portion is disposed on a side of the narrow opening portion.

6. The footwear according to claim 5, wherein The restriction fabric portion includes an outer foot restriction portion, and the outer foot restriction portion is arranged at a portion of the outer foot covering portion on the side of the narrow opening portion. The outer foot restraining portion has a shape extending outward from an edge of the narrow opening portion along the width direction to at least a center portion between the narrow opening portion and the shoe sole.

7. The footwear according to claim 5, wherein The limiting fabric portion comprises: an inner foot restriction portion disposed at a location on the side of the narrow opening portion in the inner foot covering portion; and an outer foot restriction portion, arranged at a portion of the outer foot covering portion on the side of the narrow opening portion, The inner foot restraining portion has a shape extending from the rear portion of the narrow opening portion to the sole along the width direction. The outer foot restraining portion has a shape extending from the front portion of the narrow opening portion to the sole along the width direction. 8 . The footwear according to claim 4 , wherein the restriction fabric portion has a pin portion restriction portion disposed around the pin portion.

9. The footwear of claim 4, wherein The restricting cloth portion includes a front restricting portion, the front restricting portion being arranged in front of the narrow opening portion and including a position of a front end portion of the narrow opening portion. The front restricting portion has a shape extending along the width direction.

10. The footwear of claim 9, wherein The shoe upper further includes a non-stretch fabric portion, wherein the non-stretch fabric portion includes a non-stretch strand having an elongation less than that of the limiting strand. a non-stretch side resistance index represented by a ratio of an increase in tensile stress to an increase in elongation of the non-stretch fabric portion when a tensile load acts on the non-stretch fabric portion in a direction in which the non-stretch strand is stretched, being smaller than the limit side resistance index within a range in which the elongation is greater than or equal to the specific value, The non-stretchable fabric portion includes a front non-stretchable portion, and the front non-stretchable portion is disposed in front of the front restricting portion.

11. The footwear of claim 4, wherein The restricting cloth portion includes a front restricting portion, the front restricting portion being arranged in front of the narrow opening portion and including a position of a front end portion of the narrow opening portion. The front limiting portion has: A first inner limiting portion having a shape extending forward from the front end portion of the narrow opening portion toward the inner side in the width direction; A second inner limiting portion having a shape extending from an inner end of the first inner limiting portion in the width direction and a front end of the first inner limiting portion toward the inner side in the width direction in a manner separated from the first inner limiting portion; A first outer limiting portion has a shape extending forward from a front end portion of the narrow opening portion toward the outer side in the width direction; and The second outer limiting portion has a shape extending from an inner end portion of the first outer limiting portion in the width direction and a front end portion of the first outer limiting portion toward the outer side in the width direction so as to be separated from the first outer limiting portion.

12. The footwear of claim 11, wherein The first inner restricting portion has a shape in which the length in the longitudinal direction gradually decreases toward the inner side in the width direction. The second inner limiting portion has a shape in which the length in the longitudinal direction gradually decreases toward the inner side in the width direction. The first outer limiting portion has a shape in which the length in the longitudinal direction gradually decreases toward the outer side in the width direction. The second outer limiting portion has a shape in which the length in the longitudinal direction gradually decreases toward the outer side in the width direction.

13. Footwear according to claim 11 or 12, wherein The shoe upper further includes a non-stretch fabric portion, wherein the non-stretch fabric portion includes a non-stretch strand having an elongation less than that of the limiting strand. a non-stretch side resistance index represented by a ratio of an increase in tensile stress to an increase in elongation of the non-stretch fabric portion when a tensile load acts on the non-stretch fabric portion in a direction in which the non-stretch strand is stretched, being smaller than the limit side resistance index within a range in which the elongation is greater than or equal to the specific value, The non-stretchable fabric portion comprises: an inner non-elastic portion, disposed between the first inner limiting portion and the second inner limiting portion; an outer non-elastic portion disposed between the first outer limiting portion and the second outer limiting portion; and The front end non-retractable portion is disposed between the second inner limiting portion and the second outer limiting portion.

14. Footwear according to any one of claims 1 to 3, wherein The shoe upper has: An inner foot covering portion covering at least a portion of the inner foot surface of the foot; an outer foot covering portion covering at least a portion of the outer foot surface of the foot; and The foot insertion portion is provided between the inner foot covering portion and the outer foot covering portion in the width direction of the footwear to allow the foot to enter and exit. The restricting fabric portion has a central restricting portion, and the central restricting portion is arranged in front of the pin portion. The shoe upper further includes a non-stretch fabric portion, wherein the non-stretch fabric portion includes a non-stretch strand having an elongation less than that of the limiting strand. a non-stretch side resistance index represented by a ratio of an increase in tensile stress to an increase in elongation of the non-stretch fabric portion when a tensile load acts on the non-stretch fabric portion in a direction in which the non-stretch strand is stretched, being smaller than the limit side resistance index within a range in which the elongation is greater than or equal to the specific value, The non-stretchable fabric portion comprises: an inner foot non-elastic portion, disposed on the side of the central limiting portion in the inner foot covering portion; and The outer foot non-elastic portion is arranged on the side of the central restriction portion in the outer foot covering portion.

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