CN115715614A

CN115715614A - Sole and shoe

Info

Publication number: CN115715614A
Application number: CN202211018657.1A
Authority: CN
Inventors: 谷口宪彦; 高岛慎吾; 小塚祐也; 阪口正律; 竹村周平; 木暮孝行
Original assignee: Asics Corp
Current assignee: Asics Corp
Priority date: 2021-08-24
Filing date: 2022-08-24
Publication date: 2023-02-28
Also published as: EP4140344A1; JP2023031119A; US20230062223A1; EP4140344B1

Abstract

The sole (10) is provided with a midsole body (210), an elastic part (250), and a pressing member (300). The midsole body (210) has a receiving portion (212). The elastic part (250) is accommodated in the accommodating part (212) in a compressed state. The pressing member (300) has a higher elastic modulus than that of the elastic section (250) in a compressed state, and presses the elastic section (250) so that the elastic section (250) maintains the compressed state. The elastic modulus of the elastic part (250) in a compressed state is greater than the elastic modulus of the midsole body (210).

Description

Sole and shoe

Technical Field

The disclosure relates to a shoe sole and a shoe.

Background

Conventionally, shoes having a plate provided in a midsole are known. For example, U.S. patent No. 9833038 discloses a sole structure including an upper midsole component, a lower midsole component, and a plate. The upper midsole component has an upper surface, a lower surface, and a through hole. The lower midsole component has an upper surface that is in contact with the lower surface of the upper midsole component, and a raised portion that is raised from the upper surface and is located within the through hole of the upper midsole component. The raised portion has an upper surface that is coplanar with an upper surface of the upper midsole component. A plate is attached to an upper surface of the upper midsole component and an upper surface of the raised portion. The plate is adhered to the upper surface of the raised portion and is not adhered to the upper surface of the upper midsole component.

Disclosure of Invention

In shoes for sports used for movements accompanying travel and the like, it is required to reduce impact at the time of contact with the ground and to suppress excessive deformation of the midsole at the time of kicking out.

The purpose of the present disclosure is to provide a shoe sole and a shoe that can achieve both reduction of impact during contact with the ground and suppression of excessive deformation of a midsole body during kicking-out.

The shoe sole of one aspect of this disclosure includes: a midsole body; an elastic portion formed of an elastic body and disposed in the midsole body; and a pressing member that presses the elastic portion, wherein the midsole body has a receiving portion that receives the elastic portion, the elastic portion is received in the receiving portion in a compressed state in which the elastic portion is compressed such that a volume of the elastic portion is smaller than a volume in an unloaded state, the unloaded state is a state in which no external force acts on the elastic portion, the pressing member has an elastic modulus higher than an elastic modulus of the elastic portion in the compressed state, and presses the elastic portion so that the elastic portion maintains the compressed state, the elastic modulus of the elastic portion in the compressed state being higher than the elastic modulus of the midsole body.

Further, a footwear of one aspect of the disclosure is provided with the sole, and an upper attached directly or indirectly to the sole and positioned above the sole.

The above objects, features, aspects and advantages of the present invention and other objects, features, aspects and advantages will become apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

Drawings

Fig. 1 is a cross-sectional view of a shoe in a first embodiment of the present disclosure.

FIG. 2 is a top view illustrating the relationship between a portion of a sole and the bones of a foot of a wearer of the footwear.

Fig. 3 is a sectional view based on the line III-III in fig. 1.

Fig. 4 is a cross-sectional view of a part of the sole on a plane perpendicular to the foot length direction, schematically showing a modification of the pressing member.

Fig. 5 is a cross-sectional view of a part of the sole on a plane perpendicular to the foot length direction, schematically showing a modification of the pressing member.

Fig. 6 is a cross-sectional view of a part of the sole on a plane orthogonal to the foot length direction, schematically showing a modification of the midsole.

Fig. 7 is a cross-sectional view of a part of the sole on a plane perpendicular to the foot length direction, schematically showing a modification of the elastic portion.

Fig. 8 is a plan view schematically showing a modification of the elastic portion.

Fig. 9 is a plan view schematically showing a modification of the elastic portion.

Fig. 10 is a plan view schematically showing a modification of the elastic portion.

Fig. 11 is a plan view schematically showing a modification of the elastic portion.

Fig. 12 is a sectional view schematically showing a sole of a shoe according to a second embodiment of the present disclosure.

Fig. 13 is a cross-sectional view showing a state before the elastic portion is pressed by the pressing member in the shoe sole shown in fig. 12.

Fig. 14 is a cross-sectional view of a part of the sole on a plane perpendicular to the foot length direction, schematically showing a modification of the midsole.

Fig. 15 is a cross-sectional view of a part of the sole on a plane perpendicular to the foot length direction, schematically showing a modification of the midsole.

Fig. 16 is a sectional view of a sole of a shoe of a third embodiment of the present disclosure.

Fig. 17 is a cross-sectional view based on the line XVII-XVII shown in fig. 16.

Fig. 18 is a sectional view showing a state where the midsole is removed from fig. 17.

Fig. 19 is a cross-sectional view of a part of the sole on a plane orthogonal to the foot length direction, showing a modification of the midsole.

Fig. 20 is a cross-sectional view of a part of the sole on a plane orthogonal to the foot length direction, showing a modification of the midsole.

Fig. 21 is a cross-sectional view of a part of the sole on a plane orthogonal to the foot length direction, showing a modification of the midsole.

Fig. 22 is a sectional view showing a state where the pressing member is removed from fig. 20.

Fig. 23 is a cross-sectional view showing a modified example of the sole.

Detailed Description

The disclosed embodiments will be described with reference to the drawings. In the drawings referred to below, the same or corresponding components are denoted by the same reference numerals. In the following description, terms such as the foot length direction, the foot width direction, the front side, and the rear side are used. These words indicating directions indicate directions as viewed from the viewpoint of a wearer wearing the shoe 1 placed on a plane such as the ground. For example, front refers to the tiptoe side and rear refers to the heel side. Further, the inner side refers to the inner side of the foot in the foot width direction (first toe side of the foot), and the outer side refers to the outer side of the foot in the foot width direction.

(first embodiment)

Fig. 1 is a cross-sectional view of a shoe in a first embodiment of the present disclosure. The shoe 1 of the present embodiment can be applied to, for example, sports Shoes and Walking Shoes (Walking Shoes), and the application of the shoe 1 is not limited.

As shown in fig. 1, the shoe 1 includes a sole 10 and an upper 20.

The upper 20 is directly or indirectly attached to the sole 10 and cooperates with the sole 10 to form a space for receiving a foot of a wearer.

As shown in fig. 1 and 3, the shoe sole 10 includes an outsole 100, a midsole 200, and a pressing member 300.

The outsole 100 constitutes a ground contacting portion. The outsole 100 is made of rubber or the like.

The midsole 200 is provided on the outsole 100. The upper 20 is disposed on the midsole 200. That is, the midsole 200 is disposed between the upper 20 and the outsole 100. As shown in fig. 2, the midsole 200 has a forefoot region R1, a midfoot region R2, and a rearfoot region R3. In fig. 2, a part of the sole 10 for the right foot is shown, but the sole for the left foot has a shape that is bilaterally symmetrical to or substantially following the shape of the sole 10 for the right foot.

The forefoot region R1 is a region that overlaps with the forefoot portion of the wearer of the shoe 1 in the thickness direction of the sole 10. The forefoot portion is a portion of the foot of the wearer that is positioned at the front in the longitudinal direction of the shoe 1, that is, in the foot longitudinal direction (vertical direction in fig. 2). The forefoot region R1 is a region located in a range of approximately 0% to 30% from the front end portion toward the rear end portion of the shoe 1 with respect to the entire length of the shoe 1.

The foot length direction is the direction parallel to the center of the shoe. The shoe center SC is not limited to the center line of the shoe 1, and may be a line corresponding to a straight line connecting the center of the calcaneus bone of a standard wearer of the shoe 1 and the first toe and the second toe.

The midfoot region R2 is a region that overlaps with the midfoot of the wearer of the shoe 1 in the thickness direction of the sole 10. The middle leg portion is a portion of the wearer's foot located at the center in the longitudinal direction. The midfoot region R2 is a region located in a range of about 30% to 80% from the front end portion toward the rear end portion of the shoe 1 with respect to the entire length of the shoe 1.

The rear foot region R3 is a region overlapping with the rear foot of the wearer of the shoe 1 in the thickness direction of the sole 10. The rear foot portion is a portion of the wearer's foot located rearward in the longitudinal direction. The rear foot region R3 is a region located in a range of about 80% to 100% from the front end portion toward the rear end portion of the shoe 1 with respect to the entire length of the shoe 1.

As shown in fig. 1 and 3, the midsole 200 includes a midsole body 210 and an elastic portion 250.

The midsole body 210 is formed of a resin foam material or the like. The midsole body 210 has a lower midsole 201 and an upper midsole 202.

The lower midsole 201 is provided on the outsole 100. That is, the lower surface of the lower midsole 201 is covered by the outsole 100. The lower surface of the lower midsole 201 may be partially covered with the outsole 100, or the entire area may be covered with the outsole 100.

The upper midsole 202 is attached to the lower midsole 201. The upper midsole 202 may have a higher rigidity than the lower midsole 201, or may have the same rigidity as the lower midsole 201.

The midsole body 210 has a receiving portion 212 that receives the elastic portion 250. In the present embodiment, as shown in fig. 1, the housing portion 212 is formed in the lower midsole 201. The lower midsole 201 has an upper surface 201S facing the upper midsole 202, and the receiving portion 212 has a shape opening toward the upper surface 201S of the lower midsole 201. The receiving portion 212 has a shape recessed downward from the upper surface 201S of the lower midsole 201. The receiving portion 212 may be formed to extend over the lower midsole 201 and the upper midsole 202.

The elastic part 250 is disposed in the midsole body 210. Specifically, the elastic portion 250 is housed in the housing portion 212. The elastic portion 250 is made of an elastic body. The elastic portion 250 may be formed of the same material as the lower midsole 201 or the upper midsole 202, or may be formed of a different material.

The elastic portion 250 is accommodated in the accommodating portion 212 in a compressed state in which the elastic portion 250 is compressed so that the volume thereof is smaller than that in an unloaded state in which no external force acts on the elastic portion 250. The elastic part 250 in a compressed state has a higher elastic modulus than that of the midsole body 210.

Here, the unloaded state refers to a state in which the wearer does not wear the shoe 1 (a state in which a load from the foot of the wearer does not act on the elastic portion 250), and the elastic portion 250 is not pressed by the pressing member 300 described later.

As shown in fig. 1 and 2, the elastic portion 250 is disposed at a position across an MP joint (metatarsophalangeal joint) along the foot length direction. Specifically, the midsole body 210 has an MP joint support region 215 that supports an MP joint of a foot of a wearer of the shoe 1, and the elastic portion 250 is provided in the MP joint support region 215. The MP joint bearing region 215 is formed to span the forefoot region R1 and the midfoot region R2. The length L1 of the elastic portion 250 in the foot longitudinal direction is set to be about 10% to 70% of the entire length of the shoe 1. The distance from the front end of the midsole body 210 to the front end of the elastic portion 250 is set to about 10% to 30% of the entire length of the shoe 1.

The elastic portion 250 has a bearing surface 250S. The support surface 250S is constituted by the upper surface of the elastic portion 250. The support surface 250S indirectly supports the wearer' S foot via the upper midsole 202, an insole (not shown), and the like. The support surface 250S is exposed from the receiving portion 212.

The pressing member 300 is a member that presses the elastic portion 250. In the present embodiment, the pressing member 300 is formed in a plate shape. However, if the elastic portion 250 can be pressed, the pressing member 300 may be formed of a wire or the like.

The pressing member 300 is provided to the midsole body 210. As shown in fig. 1, in the present embodiment, the pressing member 300 is disposed in the midsole body 210. More specifically, the pressing member 300 is disposed between the lower midsole 201 and the upper midsole 202. The midsole body 210 has a space for accommodating the pressing member 300. The space has a shape corresponding to the shape of the pressing member 300. The pressing member 300 is bonded to at least one of the lower midsole 201 and the upper midsole 202.

As shown in fig. 2, the pressing member 300 has an outer shape larger than the outer shape of the supporting surface 250S in a plan view. The pressing member 300 is disposed to cover the entire region of the support surface 250S. The pressing member 300 presses the elastic portion 250 from above. In the case where the pressing member 300 is formed of a wire, the fixed position of the wire to the housing portion 212 may be located outside the elastic portion 250 in a plan view.

As shown in fig. 1, the outsole 100 is disposed on the opposite side (lower side) of the side on which the pressing member 300 is disposed with respect to the elastic portion 250. The outsole 100 has a support portion 102, and the support portion 102 supports the elastic portion 250 from the side opposite to the side where the pressing member 300 is arranged with respect to the elastic portion 250. The support portion 102 may be formed in a shape overlapping the entire region of the elastic portion 250 in the foot length direction along the thickness direction, or may be formed in a shape overlapping a part of the elastic portion 250 in the foot length direction along the thickness direction. The outsole 100 has a higher elastic modulus than that of the elastic part 250 in the compressed state.

The pressing member 300 has a higher elastic modulus than that of the elastic portion 250 in the compressed state. The pressing member 300 presses the elastic part 250 so that the elastic part 250 maintains the compressed state. The pressing member 300 has a function of particularly suppressing excessive deformation of the midsole body 210 at the time of kicking-out.

The pressing member 300 is made of a fiber-reinforced resin or a non-fiber-reinforced resin. Examples of fibers used for the fiber-reinforced resin include carbon fibers, glass fibers, aramid fibers, dyneema (Dyneema) fibers, nylon (Zylon) fibers, and boron fibers. Examples of the non-fiber-reinforced resin include polymer resins such as polyurethane thermoplastic elastomers (TPU) and amide thermoplastic elastomers (TPA). The pressing member 300 is preferably made of a fiber-reinforced plastic containing a synthetic resin and the above fibers, and more preferably made of a carbon fiber-reinforced plastic containing a synthetic resin and carbon fibers.

As described above, in the shoe sole 10 of the present embodiment, the elastic portion 250 is accommodated in the accommodating portion 212 of the midsole body 210 in a compressed state, and the elastic portion 250 has a higher elastic modulus than the midsole body 210 in the compressed state, so that the elastic portion 250 suppresses excessive deformation of the midsole body 210 at the time of kicking out. In addition, the midsole body 210 mainly exerts impact cushioning properties when contacting the ground.

A modification of the above embodiment will be described below.

(first modification)

As shown in fig. 4, the pressing member 300 may have a base portion 310 and at least one protrusion portion 312.

The base portion 310 has a pressing surface 310S that presses the elastic portion 250 downward. The pressing surface 310S has a shape corresponding to the support surface 250S and the upper surface 201S of the lower midsole 201.

The protruding portion 312 protrudes from the pressing surface 310S toward the elastic portion 250. The protruding portion 312 has a shape extending along the foot length direction. In more detail, the protrusion 312 is preferably formed in a rib shape having the same shape along the foot length direction. The length of the protruding portion 312 in the foot width direction (the left-right direction in fig. 4) may be formed to gradually decrease as it separates from the pressing surface 310S. In the example shown in fig. 4, the at least one projection 312 includes a plurality of projections 312. The projections 312 are arranged at intervals along the foot width direction. Although not shown, the leg may have a rib shape extending in the foot width direction.

In this embodiment, since the protrusion 312 suppresses the expansion of the elastic portion 250 outward in the foot width direction, the elastic portion 250 is effectively maintained in a compressed state.

(second modification)

As shown in fig. 5, the pressing member 300 may have a base portion 310 and a pair of constraining walls 330. The shape of the base portion 310 is the same as that in the first modification. The pressing surface 310S of the base portion 310 is bonded to the supporting surface 250S.

The pair of restricting walls 330 extend downward from both ends of the pressing surface 310S in the foot width direction (the left-right direction in fig. 5). The pair of restricting walls 330 restricts the elastic portion 250 from both sides in the foot width direction. The inner side surface of each of the constraining walls 330 is not bonded to the elastic portion 250. The constraining walls 330 are preferably rib-shaped, for example, to extend along the length of the foot. The restricting wall 330 is more preferably formed in a ring shape (a closed pattern surrounded by a polygon such as a quadrangle, a circle, an ellipse, a straight line, or a curved line in a plan view) surrounding the elastic portion 250.

In this embodiment, since the elastic portion 250 is restrained from both sides in the foot width direction, the elastic portion 250 is effectively maintained in a compressed state. Further, since the inner surface of the restricting wall 330 is not bonded to the side surface of the elastic part 250, the elastic part 250 can be deformed so as to smoothly deform and enter the restricting wall 330 when a load is applied.

(third modification)

As shown in fig. 6, the shoe sole 10 also has a support member 350. The support member 350 is disposed on the opposite side (lower side in the example of fig. 6) of the side on which the pressing member 300 is disposed with respect to the elastic portion 250, and supports the elastic portion 250. The support member 350 sandwiches the elastic portion 250 together with the pressing member 300. The supporting member 350 may be formed of the same material as the pressing member 300. The support member 350 has a higher elastic modulus than that of the elastic portion 250 in the compressed state. Although not shown, the midsole body 210 may not be provided below the support member 350. In this case, the outsole 100 functions as a support member.

(fourth modification)

As shown in fig. 7, the elastic portion 250 may have a plurality of elastic elements 251. The elastic elements 251 are connected to each other. Each elastic element 251 is independently elastically deformable in the thickness direction of the sole 10. The elastic elements 251 may be formed of the same material or different materials.

In this embodiment, the elastic modulus of each elastic element 251 can be adjusted to adjust the elastic modulus of each region in the elastic portion 250. Further, each elastic element 251 can be independently deformed, and a portion to which a load is applied can be appropriately deformed.

(fifth modification)

As shown in fig. 8, the elastic portion 250 may have a shape that extends in the foot length direction so as to be longer on the outer foot side (right side in fig. 8) than on the inner foot side in the foot width direction. The length L2 of the elastic portion 250 in the foot longitudinal direction is set to, for example, about 10% to 70% of the entire length of the shoe 1. In this way, excessive deformation of the midsole body when the wearer pushes out the front foot-contacting type is suppressed.

As shown in fig. 9, the elastic portion 250 may be disposed at a position overlapping with a region spanning the rear leg region R3 and the middle leg region R2 in the thickness direction. The elastic portion 250 has a shape gradually toward the outer leg side toward the front in the leg length direction and a length in the leg width direction becomes smaller. The length L3 of the elastic portion 250 in the foot longitudinal direction is set to, for example, about 10% to 70% of the entire length of the shoe 1. In this way, excessive deformation of the midsole body when a wearer who touches the heel is kicked out is suppressed.

(seventh modification) as shown in fig. 10, the elastic portion 250 may be disposed at a position biased toward the inner leg side in the MP joint support region 215. The length L4 of the elastic portion 250 in the foot longitudinal direction is set to, for example, about 10% to 70% of the entire length of the shoe 1. In this way, excessive deformation of the midsole body during kicking-out of a wearer of the type in which the forefoot touches the ground on the inside is suppressed. In addition, since the formation range of the elastic portion 250 is small, the manufacturing becomes easy.

(eighth modification) as shown in fig. 11, the elastic portion 250 may be disposed at the center portion in the foot width direction in the MP joint support region 215. The length L5 of the elastic portion 250 in the foot longitudinal direction is set to, for example, about 10% to 70% of the entire length of the shoe 1. In this way, excessive deformation of the midsole body during kicking-out of a wearer of the type having a forefoot portion touching the ground is suppressed. In addition, since the formation range of the elastic portion 250 is small, the manufacturing becomes easy.

(second embodiment) next, a shoe sole 10 according to a second embodiment of the present disclosure will be described with reference to fig. 12 and 13. In the second embodiment, only the portions different from the first embodiment will be described, and the description of the same structure, operation, and effect as those of the first embodiment will not be repeated. In the second embodiment, the modifications of the first embodiment can also be applied.

In the present embodiment, the elastic part 250 is made of the same material as the midsole body 210, and is integrally formed with the midsole body 210 so as to be continuous with the midsole body 210. Specifically, the elastic portion 250 is made of the same material as the lower midsole 201, and is integrally formed with the lower midsole 201 so as to be continuous with the lower midsole 201. In fig. 12 and 13, a boundary portion between the elastic portion 250 and the lower midsole 201 in the thickness direction is indicated by a two-dot chain line. In fig. 12, the two-dot chain line showing the boundary portion thereof extends linearly, but actually, the two-dot chain line is formed in a curved shape slightly convex downward. More strictly speaking, as the elastic portion 250 is compressed, the portion of the lower midsole 201 interposed between the outsole 100 and the elastic portion 250 is also compressed, and the boundary line may be deformed into a shape different from the above shape.

Fig. 13 shows the elastic portion 250 in the unloaded state before the elastic portion 250 is pressed by the pressing member 300, and fig. 12 shows the elastic portion 250 in the compressed state. As shown in fig. 13, the support surface 250S of the elastic portion 250 in the unloaded state protrudes upward from the upper surface 201S of the lower midsole 201. The bearing surface 250S of the spring portion 250 in the compressed state is coplanar with the upper surface 201S of the lower midsole 201.

The boundary between the lower midsole 201 and the elastic portion 250 may be provided with a notch S. In this way, the elastic portion 250 is easily accommodated in the accommodating portion 212 in a compressed state.

In this embodiment, the area surrounded by the slit S and the surface passing through the upper end of the slit S, and the surface passing through the lower end of the slit S (the boundary between the elastic portion 250 and the lower midsole 201 in the thickness direction) corresponds to the receiving portion 212.

Next, a modified example of the second embodiment will be explained.

(ninth modification)

As shown in fig. 14, a groove 214 may be provided at the boundary between the lower midsole 201 and the elastic portion 250. The width of the groove 214 preferably gradually decreases from the upper surface 201S of the lower midsole 201 toward the lower side. The width of the groove 214 means a distance between the outer peripheral surface of the elastic portion 250 and the lower midsole 201 in the unloaded state. In this embodiment, the elastic portion 250 is also easily accommodated in the accommodating portion 212 in a compressed state.

In fig. 14, a boundary portion between the elastic portion 250 and the lower midsole 201 in the thickness direction is indicated by a two-dot chain line.

(tenth modification)

As shown in fig. 15, the elastic portion 250 may have end surfaces 252 connected to both ends of the support surface 250S in the foot width direction. The end surface 252 has a shape that gradually faces downward from the support surface 250S toward the outer side in the foot width direction in the unloaded state.

In fig. 15, a boundary portion between the elastic portion 250 and the lower midsole 201 in the thickness direction is indicated by a two-dot chain line.

(third embodiment)

Next, a shoe sole 10 according to a third embodiment of the present disclosure will be described with reference to fig. 16 to 18. In the third embodiment, only the portions different from the first embodiment will be described, and the description of the same structure, operation, and effect as those of the first embodiment will not be repeated. In the third embodiment, the modifications of the first embodiment can also be applied.

In the present embodiment, the sole 10 includes a midsole 200, a pressing member 300, and a midsole 400.

The midsole 200 has a midsole body 210 and an elastic part 250. In the present embodiment, the midsole body 210 includes the first body portion 203 and the second body portion 204.

The first body portion 203 has a shape extending from a front end portion to a rear end portion in the foot length direction. The thickness of the first body portion 203 is smaller than the thickness of the midsole body 210 in the first embodiment. The first body 203 is provided with a housing portion 212. As shown in fig. 16 and 17, the receiving portion 212 is open to the upper surface and the lower surface of the first body portion 203. That is, the receiving portion 212 penetrates the first body portion 203 in the thickness direction thereof.

The second body portion 204 is connected to the lower surface of the rear portion of the first body portion 203 in the foot length direction. The second body portion 204 is disposed at a position overlapping with the heel portion of the foot of the wearer in the thickness direction.

The elastic portion 250 is accommodated in the accommodating portion 212 in the compressed state. The elastic portion 250 may be formed of the same material as the first body portion 203 or the second body portion 204, or may be formed of a different material. The elastic portion 250 is formed separately from the first body portion 203.

Fig. 17 is a cross-sectional view taken along line XVII-XVII in fig. 16, and fig. 18 shows the midsole 400 removed from fig. 17. In fig. 18, the elastic portion 250 is shown in the unloaded state. As shown in fig. 18, the support surface 250S of the elastic portion 250 in the unloaded state is located above the upper surface 203S of the first body portion 203.

The pressing member 300 is connected to the lower surface of the first body 203. In the present embodiment, the pressing member 300 constitutes an outsole. The pressing member 300 is made of resin. The pressing member 300 presses the elastic portion 250 from below. As shown in fig. 16, the rear portion of the pressing member 300 is disposed between the first body portion 203 and the second body portion 204.

The midsole 400 is attached to the midsole 200. The midsole 400 is connected to the upper surface of the first body 203 and covers the support surface 250S. The midsole 400 is preferably bonded to the support surface 250S. The midsole 400 has a support portion 402 that supports the elastic portion 250 from the side (upper side) opposite to the side where the pressing member 300 is disposed, with respect to the elastic portion 250.

A modification of the third embodiment will be described below.

(eleventh modification)

As shown in fig. 19, the first body portion 203 may have a lower interposed portion 217 interposed between the elastic portion 250 and the pressing member 300.

(twelfth modification)

As shown in fig. 20, the first body portion 203 may have an upper interposed portion 218 interposed between the elastic portion 250 and the midsole 400.

(thirteenth modification example)

As shown in fig. 21, the first body portion 203 has an upper interposed portion 218 interposed between the elastic portion 250 and the midsole 400, and the elastic portion 250 is made of the same material as the first body portion 203 and is integrally formed with the first body portion 203 so as to be continuous with the upper interposed portion 218. In fig. 21, a boundary portion between the elastic portion 250 and the upper interposed portion 218 in the outer shape of the housing portion 212 is indicated by a two-dot chain line. The receiving portion 212 is defined as in the second embodiment.

Fig. 22 shows a state where the pressing member 300 is removed from fig. 21. Fig. 22 shows the elastic portion 250 in the unloaded state. As shown in fig. 22, the lower surface 250S2 of the elastic portion 250 in the unloaded state is located below the lower surface 203S2 of the first body portion 203. A notch S is provided at the boundary between the first body 203 and the elastic portion 250.

(fourteenth modification)

As shown in fig. 23, the midsole body 210 may be formed of a single member. In this example, the thickness of the midsole body 210 is smaller than the thickness of the midsole body 210 in the third embodiment.

The pressing member 300 is coupled to the lower surface of the midsole body 210. In this example, the entire region of the pressing member 300 in the foot length direction constitutes the contact portion.

The embodiments disclosed herein are illustrative in all respects and should not be considered restrictive. The scope of the present invention is defined by the claims rather than the description of the above embodiments, and includes meanings equivalent to the claims and all modifications within the scope.

[ means ]

Those skilled in the art will appreciate that the various illustrative embodiments described above are specific examples in the following manner.

In this shoe sole, the elastic portion is accommodated in the accommodating portion of the midsole body in a compressed state, and the elastic portion has an elastic modulus larger than that of the midsole body in the compressed state, so that the elastic portion suppresses excessive deformation of the midsole body at the time of kicking out. In addition, the midsole body mainly exhibits impact cushioning properties when the vehicle contacts the ground.

The midsole body may have an upper surface, and the receiving portion may have a shape that opens toward the upper surface of the midsole body. In this case, the elastic portion may be exposed from the housing portion and may have a support surface that indirectly supports the foot of the wearer, and the pressing member may press the support surface in a state of being fixed to the upper surface of the midsole body.

In this aspect, since the pressing member presses the support surface of the elastic portion, the elastic portion is accommodated in the accommodating portion in a compressed state.

In addition, the elastic part is made of the same material as the midsole body and is integrally formed with the midsole body in such a manner as to be continuous with the midsole body. In this case, the elastic portion has a support surface for indirectly supporting the foot of the wearer, and the support surface in the unloaded state protrudes upward from the upper surface of the midsole body.

In this aspect, the elastic portion is accommodated in the accommodating portion in a compressed state by the pressing member being fixed to the upper surface of the midsole body.

In this case, the elastic portion may have end surfaces connected to both ends of the support surface in the foot width direction. The end surface preferably has a shape that gradually faces downward from the support surface toward the outer side in the foot width direction in the no-load state.

In this aspect, the elastic portion is easily accommodated in the accommodating portion in a compressed state.

Further, it is preferable that a cutout is provided at a boundary between the midsole main body and the elastic portion.

In this aspect, the elastic portion is also easily accommodated in the accommodating portion in a compressed state.

Preferably, the pressing member has an outer shape larger than an outer shape of the support surface in a plan view, and is disposed so as to cover the entire area of the support surface.

In this mode, the elastic portion is uniformly compressed.

The pressing member may have a pressing surface that presses the support surface downward.

In this case, the pressing member may further have a protruding portion protruding from the pressing surface toward the elastic portion. The projection preferably has a shape extending along the foot length direction.

In this aspect, since the protrusion portion suppresses the elastic portion from expanding outward in the foot width direction, the elastic portion is effectively maintained in a compressed state.

The pressing member may further include a pair of restricting walls extending downward from both ends of the pressing surface in the foot width direction. The pair of constraining walls preferably constrain the elastic portion from both sides in the foot width direction.

In this aspect, since the elastic portion is restrained from both sides in the foot width direction, the elastic portion is effectively maintained in a compressed state.

The elastic portion may include a plurality of elastic elements that are capable of elastic deformation in the thickness direction of the sole independently of each other.

In this aspect, the elastic modulus of each region in the elastic portion can be adjusted by adjusting the elastic modulus of each elastic element. Further, each elastic element can be independently deformed, and a portion to which a load is applied can be appropriately deformed.

In addition, the midsole body may also have an MP joint support region that supports an MP joint of a foot of a wearer of the footwear. In this case, the elastic portion is preferably provided in the MP joint support region.

Preferably, the pressing member is made of fiber reinforced plastic.

Further, a footwear of one aspect of the disclosure has the sole, and an upper directly or indirectly connected to the sole and positioned above the sole.

The embodiments of the present invention have been described, but the embodiments disclosed herein are illustrative in all points and should not be construed as being limiting. The scope of the present invention is defined by the claims, and includes all modifications equivalent in meaning to the claims and within the scope.

Claims

1. A shoe sole (10) is characterized by being provided with:

a midsole body (210);

an elastic part (250) which is composed of an elastic body and is arranged in the midsole body; and

a pressing member (300) for pressing the elastic portion,

the middle sole body is provided with a containing part (212) for containing the elastic part,

the elastic portion (250) is housed in the housing portion in a compressed state in which the elastic portion is compressed so that the volume of the elastic portion is smaller than the volume in an unloaded state in which no external force acts on the elastic portion,

the pressing member (300) has a higher elastic modulus than that of the elastic portion in the compressed state, and presses the elastic portion so that the elastic portion maintains the compressed state,

the elastic portion has a higher elastic modulus in the compressed state than the midsole body.

2. The sole of claim 1,

the midsole body having an upper surface (201S),

the receiving portion (212) has a shape that opens toward the upper surface of the midsole body,

the elastic part (250) is exposed from the receiving part and has a supporting surface (250S) for indirectly supporting the foot of the wearer,

the pressing member (300) presses the support surface in a state of being fixed to the upper surface of the midsole body.

3. The sole of claim 1,

the midsole body having an upper surface (201S),

the resilient portion (250) is of the same material as the midsole body and is integrally formed with the midsole body in a manner continuous with the midsole body,

the elastic part has a support surface (250S) for indirectly supporting the foot of the wearer,

the support surface in the unloaded state protrudes upward from the upper surface of the midsole body.

4. The sole of claim 3,

the elastic part (250) has end faces (252) connected to both ends of the support face in the foot width direction,

the end surface (252) has a shape that gradually faces downward from the support surface toward the outer side in the foot width direction in the no-load state.

5. The sole according to claim 3 or 4,

a cut (S) is provided at a boundary between the midsole body and the elastic portion.

6. The sole according to any one of claims 2 to 5,

the pressing member (300) has an outer shape larger than the outer shape of the support surface in a plan view, and is disposed so as to cover the entire area of the support surface.

7. The sole according to any one of claims 2 to 6,

the pressing member (300) has a pressing surface (310S) that presses the support surface downward.

8. The sole of claim 7,

the pressing member (300) further has a protruding portion (312) protruding from the pressing surface toward the elastic portion,

the protrusion has a shape extending along a length direction of the foot.

9. The sole according to claim 7 or 8,

the pressing member (300) further has a pair of restricting walls (330) extending downward from both ends of the pressing surface in the foot width direction,

the pair of restricting walls restricts the elastic portion from both sides in the foot width direction.

10. The sole according to any one of claims 1 to 9,

the elastic part (250) includes a plurality of elastic elements (251) that are capable of elastic deformation in the thickness direction of the sole independently.

11. The sole according to any one of claims 1 to 10,

the midsole body (210) having an MP joint support region (215) that supports an MP joint of a foot of a wearer of the shoe,

the elastic part is arranged in the MP joint supporting area.

12. The sole according to any one of claims 1 to 11,

the pressing member (300) is made of fiber-reinforced plastic.

13. A shoe (1) is characterized by being provided with:

the sole (10) of any one of claims 1 to 12; and

an upper (20) attached directly or indirectly to the sole and positioned above the sole.