JP2022119166A - Shoe structure and skate shoe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shoe structure and skate shoes capable of achieving leather-like suppleness, while aiming at rigidity and weight saving by using a fiber-reinforced resin.

SOLUTION: In an embodiment, a shoe structure includes an upper part, and a sole part provided on the bottom side of the upper part and molded integrally with the upper part. The upper part has a first layer structure. The first layer structure includes a first fiber-reinforced resin layer, a second fiber-reinforced resin layer, and a first rubber layer arranged between the first fiber-reinforced resin layer and the second fiber-reinforced resin layer.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2022,JPO&INPIT

Description

TECHNICAL FIELD The present invention relates to a shoe structure in which an upper portion and a sole portion are integrally formed, and a skate using this shoe structure.

Sports shoes such as skates and skis fit the athlete's feet, reliably transmit movement to the ground (including ice and snow surfaces), and accurately return the reaction force from the ground to the feet. is important. In addition, reducing the burden on the feet and durability are also important factors.

Patent Literature 1 discloses an upper core that is lightweight while ensuring desired rigidity, and a skate shoe using the same. This upper core is an upper core that constitutes a part of the skate shoe, and is made of a fiber-reinforced resin made of fibers and a base material.

JP 2019-216943 A

However, when fiber reinforced plastic (FRP) is used for the upper part of the shoe structure in order to ensure both rigidity and weight reduction, it is difficult to achieve the suppleness of leather. be. For example, when a thermosetting resin is used as the base material of FRP, it is too hard to fit the foot. Moreover, when a thermoplastic resin is used as the base material of FRP, it is difficult to ensure sufficient strength.

SUMMARY OF THE INVENTION An object of the present invention is to provide a shoe structure and a skate which are made of a fiber-reinforced resin to achieve rigidity and weight reduction, while realizing the suppleness of leather.

A shoe structure according to one aspect of the present invention includes an upper portion and a sole portion provided on the bottom side of the upper portion and integrally molded with the upper portion. The upper portion has a first layer structure which is a layer structure including a fiber reinforced resin layer and a rubber layer. The first layer structure includes a first fiber reinforced resin layer that is a fiber reinforced resin layer, a second fiber reinforced resin layer that is a fiber reinforced resin layer, and between the first fiber reinforced resin layer and the second fiber reinforced resin layer. and a first rubber layer, which is a rubber layer disposed on the The entire upper is molded from the first layer construction.

According to such a configuration, the upper portion has a layer structure (first layer structure), and as the first layer structure, the first rubber layer is provided between the first fiber reinforced resin layer and the second fiber reinforced resin layer. Since the layers are arranged, rigidity and weight reduction can be achieved by the first fiber reinforced resin layer and the second fiber reinforced resin layer, and elasticity can be increased by the first rubber layer.

In the above shoe structure, the base material resin of each of the first fiber reinforced resin layer and the second fiber reinforced resin layer is preferably a thermosetting resin. Further, the reinforcing fibers of each of the first fiber reinforced resin layer and the second fiber reinforced resin layer are at least one selected from the group consisting of carbon fiber, aramid fiber, polyethylene fiber, Zylon fiber, boron fiber and glass fiber. Preferably. Also, the first rubber layer is preferably made of nitrile rubber.

In the above shoe structure, at least one of the first fiber reinforced resin layer and the second fiber reinforced resin layer may have a plurality of reinforcing fiber layers. Thereby, the rigidity and thickness can be adjusted by the number of reinforcing fiber layers of the first fiber reinforced resin layer and the second fiber reinforced resin layer.

In the above shoe structure, the sole portion has a toe portion, a heel portion, and an arch portion. A third fiber reinforced resin layer that is a fiber reinforced resin layer provided on the part side, and a second rubber layer that is a rubber layer provided on the side opposite to the upper part of the third fiber reinforced resin layer. preferable. According to such a second layer structure of the toe portion and the heel portion, the third fiber reinforced resin layer ensures rigidity, and the outermost (bottom side) second rubber layer enhances cushioning and sound absorption. can be done.

In the shoe structure described above, the base material resin of the third fiber-reinforced resin layer is preferably a thermosetting resin. Moreover, the reinforcing fiber of the third fiber-reinforced resin layer is preferably at least one selected from the group consisting of carbon fiber, aramid fiber, polyethylene fiber, Zylon fiber, boron fiber and glass fiber. Also, the second rubber layer is preferably made of nitrile rubber.

In the above shoe structure, the third fiber-reinforced resin layer may have a plurality of layers of reinforcing fibers. Thereby, the rigidity and thickness can be adjusted by the number of reinforcing fiber layers of the third fiber-reinforced resin layer.

In the above shoe structure, the second layer structure may further include a thermoplastic resin layer provided between the third fiber-reinforced resin layer and the second rubber layer. As a result, the thermoplastic resin layer can appropriately reinforce the second layer structure and enhance impact absorption.

In the above shoe structure, the arch portion has a third layer structure which is a layer structure, and the third layer structure includes a fourth fiber reinforced resin layer which is a fiber reinforced resin layer provided on the upper portion side, and a fourth fiber reinforced resin layer. A fifth fiber reinforced resin layer, which is a fiber reinforced resin layer provided on the side opposite to the upper portion of the fiber reinforced resin layer, and a rubber provided between the fourth fiber reinforced resin layer and the fifth fiber reinforced resin layer. It is preferable to include a third rubber layer which is a layer. According to such a third layer structure of the arch portion, rigidity and weight reduction can be achieved by the fourth fiber reinforced resin layer and the fifth fiber reinforced resin layer, and elasticity can be increased by the third rubber layer.

In the above shoe structure, the base material resin of each of the fourth fiber reinforced resin layer and the fifth fiber reinforced resin layer is preferably a thermosetting resin. Further, the reinforcing fiber of each of the fourth fiber-reinforced resin layer and the fifth fiber-reinforced resin layer is at least one selected from the group consisting of carbon fiber, aramid fiber, polyethylene fiber, Zylon fiber, boron fiber and glass fiber. Preferably. Also, the third rubber layer is preferably made of nitrile rubber.

In the above shoe structure, at least one of the fourth fiber reinforced resin layer and the fifth fiber reinforced resin layer may have a plurality of reinforcing fiber layers. Thereby, the rigidity and thickness can be adjusted by the number of reinforcing fiber layers of the fourth fiber reinforced resin layer and the fifth fiber reinforced resin layer.

The above shoe structure further comprises a shoe tongue portion attached to the upper portion, the shoe tongue portion having a fourth layer structure which is a layer structure, and the fourth layer structure is a fiber reinforced resin layer provided on the upper portion side. It is preferable that a certain sixth fiber reinforced resin layer and a fourth rubber layer, which is a rubber layer provided on the opposite side of the sixth fiber reinforced resin layer to the upper portion, be provided. According to such a fourth layer structure of the shoe tongue portion, rigidity and weight reduction can be achieved by the sixth fiber-reinforced resin layer, and elasticity can be enhanced by the fourth rubber layer.

In the above shoe structure, a hook for hooking a shoelace may be directly fastened to the upper portion. Moreover, it is preferable that the upper portion is provided with a hole through which the shoelace is passed. As a result, the hook can be firmly fixed to the upper portion, and the hook for hooking the shoelace can be prevented from coming off, and the hole through which the shoelace is passed can be prevented from being deformed or damaged.

One aspect of the present invention is a skate comprising the shoe structure described above and a blade fixed to a sole portion of the shoe structure. According to such a configuration, the shoe structure has a layer structure of the fiber reinforced resin layer and the rubber layer, so that in addition to the rigidity and weight reduction of the fiber reinforced resin layer, the elasticity of the rubber layer is added to the layer structure. can give.

ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the shoe structure and the skate which can realize flexibility like leather, while achieving rigidity and weight reduction using fiber reinforced resin.

FIG. 1 is a schematic diagram illustrating the configuration of the upper portion of the shoe structure according to this embodiment. FIG. 2 is a schematic cross-sectional view showing another example of the first layer structure. FIG. 3 is a schematic diagram illustrating the configuration of the sole portion of the shoe structure according to this embodiment. FIG. 4 is a schematic cross-sectional view showing another example of the second layer structure. FIG. 5 is a schematic diagram illustrating the configuration of the sole portion of the shoe structure according to this embodiment. FIG. 6 is a schematic diagram illustrating the configuration of the shoe tongue portion of the shoe structure according to this embodiment. FIG. 7 is a schematic diagram illustrating the layer structure of the tongue portion. FIG. 8 is a perspective view illustrating the configuration of the hooks of the shoe structure according to this embodiment. FIG. 9 is a perspective view illustrating a hole through which a shoelace is passed in the shoe structure according to this embodiment. FIG. 10 is a perspective view illustrating the configuration of the skate shoe according to this embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. In the following description, the same members are denoted by the same reference numerals, and the description of members that have already been described will be omitted as appropriate. Also, for convenience of explanation, in this embodiment, the left foot side of the left and right shoes will be described as an example, but the same applies to the right foot side.

(Upper part)
FIGS. 1(a) and 1(b) are schematic diagrams illustrating the configuration of an upper portion 10 of a shoe structure 1 according to this embodiment. FIG. 1(a) shows a perspective view of the upper part 10, and FIG. 1(b) shows a cross-sectional view of the first layer structure ST1 of the upper part 10. As shown in FIG.
As shown in FIG. 1( a ), a shoe structure 1 according to this embodiment includes an upper portion 10 and a sole portion 20 . The upper part 10 is molded to correspond to the shape of the foot and has a shape that surrounds the circumference of the foot. That is, the upper part 10 includes a tip portion 101 corresponding to the toe, an outer portion 102 corresponding to the outer side of the foot, an inner portion 103 corresponding to the inner side of the foot, a rear end portion 104 corresponding to the heel, and an ankle from the malleolus. It has upwardly extending portions 105 which are integrally molded. The upper portion 10 is provided with an upper opening 10h1 into which a foot is put, and a central opening 10h2 is provided from the front of the upper opening 10h1 to the tip portion 101. As shown in FIG. The upper opening 10h1 and the central opening 10h2 are provided so that the upper portion 10 can be easily expanded when the foot is put in, and the upper portion 10 can be easily tightened when the foot is put in.

The sole portion 20 is provided on the bottom side of the upper portion 10 . The sole portion 20 has a toe portion 21 , a heel portion 22 and an arch portion 23 . In the shoe structure 1 , the sole portion 20 is integrally molded with the upper portion 10 . As a result, the shoe structure 1 has a shell-type one-piece structure from the upper portion 10 to the sole portion 20 . Details of the sole portion 20 will be described later.

In the shoe structure 1 according to this embodiment, the upper portion 10 has a first layer structure ST1. FIG. 1(b) shows a cross section of the A portion of FIG. 1(a). The first layer structure ST1 includes a first fiber reinforced resin layer 111, a second fiber reinforced resin layer 112, and a first rubber layer disposed between the first fiber reinforced resin layer 111 and the second fiber reinforced resin layer 112. a layer 113; That is, the upper part 10 has a layered structure in which the first rubber layer 113 is sandwiched between the first fiber reinforced resin layer 111 and the second fiber reinforced resin layer 112 . The entire upper part 10 is formed by the first layer structure ST1.

The resin of the base material M of each of the first fiber reinforced resin layer 111 and the second fiber reinforced resin layer 112 is a thermosetting resin. For example, an epoxy resin is used as the thermosetting resin. Reinforcing fiber F of each of first fiber reinforced resin layer 111 and second fiber reinforced resin layer 112 is at least one selected from the group consisting of carbon fiber, aramid fiber, polyethylene fiber, Zylon fiber, boron fiber and glass fiber. is. Nitrile rubber is used for the first rubber layer 113 .

As a representative example of the first layer structure ST1, the first fiber reinforced resin layer 111 and the second fiber reinforced resin layer 112 are FRP ( Fiber Reinforced Plastic), and the first rubber layer 113 is nitrile rubber. As a result, a layered structure in which nitrile rubber is sandwiched between two layers of FRP is constructed.

The thickness of the first fiber reinforced resin layer 111 and the second fiber reinforced resin layer 112 is about 0.1 millimeter (mm) or more and 3 mm or less, and the thickness of the first rubber layer 113 is 0.5 mm or more and 5 mm or less. degree. These thicknesses are appropriately selected depending on the hardness and durability of the upper portion 10 .

Thus, by applying a layer structure in which the first rubber layer 113 is arranged between the first fiber reinforced resin layer 111 and the second fiber reinforced resin layer 112 as the first layer structure ST1, the first fiber reinforced The resin layer 111 and the second fiber-reinforced resin layer 112 can increase the rigidity of the upper portion 10 and reduce the weight thereof. In addition, the layer structure in which the first rubber layer 113 is sandwiched between the first fiber reinforced resin layer 111 and the second fiber reinforced resin layer 112 makes it possible to obtain elasticity (flexibility) that cannot be obtained by FRP alone. In other words, since the first fiber reinforced resin layer 111 and the second fiber reinforced resin layer 112 are bonded by the first rubber layer 113, the first fiber reinforced resin layer 111 and the second fiber reinforced resin layer 112 will be deformed when a bending stress is applied to the first layer structure ST1. The layer direction deviation between the first rubber layer 111 and the second fiber reinforced resin layer 112 can be absorbed by the expansion and contraction of the first rubber layer 113 in the layer direction. As a result, the first layer structure ST1 becomes easier to bend (increases elasticity) than a structure without the first rubber layer 113 .

Since the upper part 10 has such a first layer structure ST1, it is possible to obtain rigidity and weight reduction by the first fiber reinforced resin layer 111 and the second fiber reinforced resin layer 112 and elasticity by the first rubber layer 113. It is light and strong, yet has the suppleness of leather, making it easier to fit your feet.

FIGS. 2A and 2B are schematic cross-sectional views showing other examples of the first layer structure ST1.
In another example of the first layer structure ST1 shown in FIGS. 2(a) and 2(b), at least one of the first fiber reinforced resin layer 111 and the second fiber reinforced resin layer 112 is a layer of a plurality of reinforcing fibers F. have.
In the example shown in FIG. 2( a ), two layers of reinforcing fibers F are provided in each of the first fiber reinforced resin layer 111 and the second fiber reinforced resin layer 112 . In order to provide a plurality of layers of reinforcing fibers F in the resin (for example, epoxy resin) of the base material M, a plurality of base materials M each having a single layer of reinforcing fibers F and having a predetermined thickness are laminated and molded. Although the base materials are integrated during heating in the molding process, the base materials are indicated by a chain double-dashed line in FIG. 2 for convenience of explanation.

In the example shown in FIG. 2B, each of the first fiber reinforced resin layer 111 and the second fiber reinforced resin layer 112 is provided with three layers of reinforcing fibers F. In the example shown in FIG. Two layers of the first rubber layer 113 are provided. As the number of layers of reinforcing fibers F in the first fiber reinforced resin layer 111 and the second fiber reinforced resin layer 112 increases, the rigidity increases and the thickness increases. As the number of layers of the first rubber layer 113 increases, the thickness increases and the cushioning property increases. Thus, the number of layers of reinforcing fibers F in the first fiber reinforced resin layer 111 and the second fiber reinforced resin layer 112 and the number of layers of the first rubber layer 113 determine the rigidity, thickness and cushioning of the upper portion 10 . Gender can be adjusted. The thickness of the first rubber layer 113 may be adjusted by adjusting the number of layers, or by adjusting the thickness of one layer.

(Sole part: toe part and heel part)
FIGS. 3A and 3B are schematic diagrams illustrating the configuration of the sole portion 20 of the shoe structure 1 according to this embodiment. FIG. 3(a) shows a perspective view of the toe portion 21 and the heel portion 22 of the sole portion 20, and FIG. 3(b) shows the second layer structure ST2 of the toe portion 21 and the heel portion 22 of the sole portion 20. A cross-sectional view is shown.
As shown in FIG. 3( a ), the sole portion 20 of the shoe structure 1 according to this embodiment has a toe portion 21 , a heel portion 22 and an arch portion 23 . The sole portion 20 is provided on the bottom side of the upper portion 10 and is molded integrally with the upper portion 10 .

In the shoe structure 1 according to this embodiment, the toe portion 21 and the heel portion 22 of the sole portion 20 have the second layer structure ST2 which is a different layer structure from the first layer structure ST1. FIG. 2(b) shows a cross section of the B portion of FIG. 2(a). The second layer structure ST2 includes a third fiber reinforced resin layer 211 provided on the upper portion 10 side, and a second rubber layer 213 provided on the opposite side of the third fiber reinforced resin layer 211 to the upper portion 10. . That is, the toe portion 21 and the heel portion 22 have a layer structure in which the third fiber reinforced resin layer 211, which is FRP, is provided on the upper portion 10 side, and the second rubber layer 213 is provided on the outside.

The resin of the base material M of the third fiber reinforced resin layer 211 is a thermosetting resin. For example, an epoxy resin is used as the thermosetting resin. The reinforcing fibers F of the third fiber-reinforced resin layer 211 are at least one selected from the group consisting of carbon fibers, aramid fibers, polyethylene fibers, Zylon fibers, boron fibers and glass fibers. Nitrile rubber is used for the second rubber layer 213 .

As a representative example of the second layer structure ST2, the third fiber reinforced resin layer 211 is FRP in which epoxy resin (base material M) is reinforced with carbon fibers (reinforced fibers F), and the second rubber layer 213 is , nitrile rubber.

The thickness of the third fiber reinforced resin layer 211 is about 0.1 mm or more and 10 mm or less, and the thickness of the second rubber layer 213 is about 0.5 mm or more and 10 mm or less. These thicknesses are appropriately selected depending on the hardness, thickness, and durability of each of the toe portion 21 and heel portion 22 . The thicknesses of the third fiber reinforced resin layer 211 and the second rubber layer 213 may be different or the same between the toe portion 21 and the heel portion 22 .

According to the second layer structure ST2 of the toe portion 21 and the heel portion 22, the third fiber reinforced resin layer 211 ensures rigidity, and the outermost (bottom side) second rubber layer 213 provides cushioning and Sound absorption can be enhanced.

FIGS. 4A and 4B are schematic cross-sectional views showing other examples of the second layer structure ST2.
In another example of the second layer structure ST2 shown in FIGS. 4(a) and 4(b), the third fiber reinforced resin layer 211 has a plurality of layers of reinforcing fibers F. As shown in FIG.
In the example shown in FIG. 4( a ), multiple layers of reinforcing fibers F are provided in the third fiber-reinforced resin layer 211 . In order to provide a large number of layers of reinforcing fibers F in the resin (for example, epoxy resin) of the base material M, a plurality of base materials M each having a single layer of reinforcing fibers F and having a predetermined thickness are laminated and molded. Although the space between the base materials is integrated during heating in the molding process, the space between the base materials is indicated by a chain double-dashed line in FIG. 4 for convenience of explanation.

As the number of reinforcing fibers F in the third fiber-reinforced resin layer 211 increases, the rigidity increases and the thickness increases. In particular, the toe portion 21 and the heel portion 22 of the sole portion 20 receive a strong force when landing (including accretion of ice and snow). need to keep The rigidity and thickness of the toe portion 21 and the heel portion 22 can be adjusted by the number of layers of the reinforcing fibers F in the third fiber-reinforced resin layer 211 .

The number of layers of the second rubber layer 213 may be adjusted in the second layer structure ST2. As the number of layers of the second rubber layer 213 increases, the thickness increases and the cushioning property increases. The thickness of the second rubber layer 213 may be adjusted by adjusting the number of layers, or by adjusting the thickness of one layer.

In the example shown in FIG. 4B, a thermoplastic resin layer 215 is further provided between the third fiber reinforced resin layer 211 and the second rubber layer 213 as the second layer structure ST2. As in the example shown in FIG. 4B, a thermoplastic resin layer 215 may be provided in the middle of the thickness direction of the third fiber reinforced resin layer 211 . By providing the thermoplastic resin layer 215 between the third fiber reinforced resin layer 211 and the second rubber layer 213, it is possible to appropriately reinforce the second layer structure ST2 and improve the impact absorption.

(Sole part: arch part)
5(a) and 5(b) are schematic diagrams illustrating the configuration of the sole portion 20 of the shoe structure 1 according to this embodiment. FIG. 5(a) shows a perspective view of the arch portion 23 of the sole portion 20, and FIG. 5(b) shows a sectional view of the third layer structure ST3 of the arch portion 23 of the sole portion 20. As shown in FIG.
As shown in FIG. 5( a ), the arch portion 23 is part of the sole portion 20 and is provided between the toe portion 21 and the heel portion 22 . Arch portion 23 is integrally molded with toe portion 21 and heel portion 22 .

In the shoe structure 1 according to this embodiment, the arch portion 23 of the sole portion 20 has the third layer structure ST3 which is a different layer structure from the first layer structure ST1 and the second layer structure ST2. FIG. 5(b) shows a cross section of the portion C in FIG. 5(a). The third layer structure ST3 includes a fourth fiber reinforced resin layer 231 provided on the upper portion 10 side, a fifth fiber reinforced resin layer 232 provided on the opposite side of the fourth fiber reinforced resin layer 231 to the upper portion 10, The third rubber layer 233 provided between the fourth fiber reinforced resin layer 231 and the fifth fiber reinforced resin layer 232 is provided. That is, the arch portion 23 has a layered structure in which the third rubber layer 233 is sandwiched between the fourth fiber reinforced resin layer 231 and the fifth fiber reinforced resin layer 232 .

The resin of the base material M of each of the fourth fiber reinforced resin layer 231 and the fifth fiber reinforced resin layer 232 is a thermosetting resin. For example, an epoxy resin is used as the thermosetting resin. The reinforcing fiber F of each of the fourth fiber reinforced resin layer 231 and the fifth fiber reinforced resin layer 232 is at least one selected from the group consisting of carbon fiber, aramid fiber, polyethylene fiber, Zylon fiber, boron fiber and glass fiber. is. Nitrile rubber is used for the third rubber layer 233 .

As a representative example of the third layer structure ST3, the fourth fiber-reinforced resin layer 231 and the fifth fiber-reinforced resin layer 232 are FRPs in which epoxy resin (base material M) is reinforced with carbon fibers (reinforcing fibers F). and the third rubber layer 233 is nitrile rubber. As a result, a layered structure in which nitrile rubber is sandwiched between two layers of FRP is constructed.

The thickness of the fourth fiber reinforced resin layer 231 and the fifth fiber reinforced resin layer 232 is about 0.1 millimeter (mm) or more and 10 mm or less, and the thickness of the third rubber layer 233 is 0.5 mm or more and 10 mm or less. degree. These thicknesses are appropriately selected according to the hardness and durability of the arch portion 23 .

According to the third layer structure ST3 of the arch portion 23, the fourth fiber reinforced resin layer 231 and the fifth fiber reinforced resin layer 232 achieve rigidity and weight reduction, and the third rubber layer 233 increases elasticity. can.

Further, in the third layer structure ST3, at least one of the fourth fiber reinforced resin layer 231 and the fifth fiber reinforced resin layer 232 may have a plurality of reinforcing fiber F layers. As the number of layers of reinforcing fibers F in the fourth fiber reinforced resin layer 231 and the fifth fiber reinforced resin layer 232 increases, the rigidity increases and the thickness increases.

Also, the number of layers of the third rubber layer 233 may be adjusted. As the number of layers of the third rubber layer 233 increases, the thickness increases and the cushioning property increases. The thickness of the third rubber layer 233 may be adjusted by adjusting the number of layers, or by adjusting the thickness of one layer.

Thus, the rigidity, thickness and cushioning of the arch portion 23 are determined by the number of layers of the reinforcing fibers F of the fourth fiber reinforced resin layer 231 and the fifth fiber reinforced resin layer 232 and the number of layers of the third rubber layer 233. Gender can be adjusted.

In particular, the arch portion 23 of the sole portion 20 is in a state of floating from the ground (including ice surface, snow surface, etc.) between the toe portion 21 and the heel portion 22. It is required to create sufficient repulsive force from ) to kicking out. In addition, since the arch portion 23 is repeatedly subjected to a large bending force, sufficient durability is required. The rigidity, repulsive force, and durability required for the arch portion 23 are determined by the number of layers of the reinforcing fibers F in the fourth fiber reinforced resin layer 231 and the fifth fiber reinforced resin layer 232 and the thickness of the third rubber layer 233. can be adjusted.

(Shoe tongue part)
FIG. 6 is a schematic diagram illustrating the configuration of the shoe tongue portion 30 of the shoe structure 1 according to this embodiment.
FIG. 7 is a schematic diagram illustrating the layer structure of the tongue portion 30. As shown in FIG. 7(a) shows a perspective view of the core material 301 of the shoe tongue portion 30, and FIGS. 7(b) and 7(c) show cross-sectional views of the fourth layer structure ST4 of the shoe tongue portion 30. FIG.
As shown in FIG. 6 , the shoe tongue portion 30 of the shoe structure 1 according to this embodiment has a core material 301 and an outer skin portion 302 covering the core material 301 . A cushion material (such as urethane foam) wrapped in a leather sheet is used for the skin portion 302 .

The core material 301 has a first portion 31 placed on the instep and a second portion 32 provided above the first portion 31 and in contact with the front of the ankle. The tongue portion 30 serves to hold the instep and the front of the ankle. The tongue portion 30 is arranged inside the upper portion 10 so as to block the central opening 10h2 of the upper portion 10 shown in FIG.

In the shoe structure 1 according to this embodiment, the first portion 31 of the core material 301 has the fourth layer structure ST4 at least in part. FIG. 7(b) shows an example of a cross section of part D in FIG. The fourth layer structure ST4 is provided near the second portion 32 in the first portion 31, for example. The fourth layer structure ST4 shown in FIG. 7B includes a sixth fiber reinforced resin layer 311 provided on the upper portion 10 side, and a fourth fiber reinforced resin layer 311 provided on the side opposite to the upper portion 10 of the sixth fiber reinforced resin layer 311. and a rubber layer 313 . That is, in the fourth layer structure ST4 of the core material 301, the fourth rubber layer 313 is provided on the foot side, and the sixth fiber reinforced resin layer 311 is provided on the upper portion 10 side opposite to the foot.

In the tongue portion 30, the width of the first portion 31 of the core material 301 is narrower than the width of the second portion 32, and is arranged in the center. As a result, both sides of the first portion 31 are made up of only the skin portion 302, which reduces the rigidity and makes it easier to fit the first portion 31 of the shoe tongue portion 30 to the instep when the shoelace is tightened. On the other hand, the width of the second portion 32 of the core material 301 is approximately equal to the width of the skin portion 302 . As a result, the rigidity of the entire second portion 32 is increased, and when the shoelace is tightened, the second portion 32 of the core material 301 can firmly hold the entire front of the ankle.

The resin of the base material M of the sixth fiber reinforced resin layer 311 is a thermosetting resin. For example, an epoxy resin is used as the thermosetting resin. The reinforcing fiber F of the sixth fiber-reinforced resin layer 311 is at least one selected from the group consisting of carbon fiber, aramid fiber, polyethylene fiber, Zylon fiber, boron fiber and glass fiber. Nitrile rubber is used for the fourth rubber layer 313 .

As a representative example of the fourth layer structure ST4, the sixth fiber reinforced resin layer 311 is FRP in which epoxy resin (base material M) is reinforced with aramid fiber (reinforced fiber F), and the fourth rubber layer 313 is , nitrile rubber.

The thickness of the sixth fiber reinforced resin layer 311 is about 0.1 mm or more and 5 mm or less, and the thickness of the fourth rubber layer 313 is about 0.5 mm or more and 5 mm or less. These thicknesses are appropriately selected according to the hardness, thickness, and durability of the tongue portion 30 .

According to the fourth layer structure ST4 of the tongue portion 30, the sixth fiber reinforced resin layer 311 can achieve rigidity and weight reduction, and the fourth rubber layer 313 can enhance elasticity.

Further, in the fourth layer structure ST4, the sixth fiber reinforced resin layer 311 may have a plurality of layers of reinforcing fibers F. As the number of reinforcing fibers F in the sixth fiber-reinforced resin layer 311 increases, the rigidity increases and the thickness increases.

Also, the number of layers of the fourth rubber layer 313 may be adjusted. As the number of layers of the fourth rubber layer 313 increases, the thickness increases and the cushioning property increases. The thickness of the fourth rubber layer 313 may be adjusted by adjusting the number of layers, or by adjusting the thickness of one layer.

Thus, the rigidity, thickness and cushioning properties of the shoe tongue portion 30 can be adjusted by adjusting the number of layers of the reinforcing fibers F of the sixth fiber-reinforced resin layer 311 and the number of layers of the fourth rubber layer 313 .

7(c) shows another example of the cross section of the D portion of FIG. A fourth layer structure ST4 shown in FIG. The fourth rubber layer 313 is arranged between the sixth fiber reinforced resin layer 311 and the seventh fiber reinforced resin layer 312 . The base material M, reinforcing fibers F, and thickness of the seventh fiber-reinforced resin layer 312 are the same as those of the sixth fiber-reinforced resin layer 311 . By using the fourth structure ST4 in which the rubber layer 313 is sandwiched between the sixth fiber reinforced resin layer 311 and the seventh fiber reinforced resin layer 312, the rigidity can be further increased.

In the tongue portion 30 described above, an example in which at least a portion of the first portion 31 of the core material 301 has the fourth layer structure ST4 is shown, but the entire first portion 31 has the fourth layer structure ST4. Alternatively, the second portion 32 may have the fourth layer structure ST4. Further, the entire core material 301 may have the fourth layer structure ST4.

(hook)
FIG. 8 is a perspective view illustrating the configuration of the hook 40 of the shoe structure 1 according to this embodiment.
The hook 40 is a fitting for hooking a shoelace, and is attached to the upwardly extending portion 105 of the upper portion 10 near the central opening 10h2. In this embodiment, the hook 40 is directly fastened to the upper portion 10 . For example, the hook 40 is directly fixed to the upper portion 10 by the caulking 41 so as to penetrate the first layer structure ST1 of the upper portion 10 .

The first layer structure ST1 of the upper part 10 includes a highly rigid first fiber reinforced resin layer 111 and a second fiber reinforced resin layer 112, and the caulking 41 is attached so as to penetrate these layers. , the hook 40 can be firmly fixed to the upper part 10. - 特許庁A strong force is applied to the hook 40 by tightening the shoelace, but since the hook 40 is directly fastened to the upper part 10, the hook 40 is prevented from coming off, and durability can be improved. As a result, the shoelace can be strongly hooked on the hook 40 to firmly tighten and fix around the ankle.

(hole for shoelaces)
FIG. 9 is a perspective view illustrating the hole 50 through which the shoelace of the shoe structure 1 according to this embodiment is passed.
A plurality of holes 50 through which the shoelaces are passed are provided along the edge of the central opening 10h2 near the central opening 10h2 in the outer portion 102 and the inner portion 103 of the upper portion 10. As shown in FIG. The first layer structure ST1 of the upper part 10 includes a highly rigid first fiber reinforced resin layer 111 and a second fiber reinforced resin layer 112, and holes 50 are provided so as to penetrate these layers. Even if a load is applied to the hole 50 when the shoelace is passed through the hole 50 and tightened, the hole 50 can be prevented from being deformed or damaged. This allows the lace to pass through the hole 50 and be tightened and secured.

(Manufacturing method of shoe structure)
As a method for manufacturing the shoe structure 1 according to this embodiment, various FRP manufacturing methods can be applied, and an autoclave manufacturing method is particularly suitable. In order to manufacture the shoe structure 1 by the autoclave manufacturing method, first, a mold suitable for the user's foot is prepared. Next, a semi-cured sheet (prepreg sheet) in which reinforcing fiber F (for example, aramid fiber) is impregnated with the resin of base material M (for example, epoxy resin) is attached to the mold, and if necessary, a plurality of sheets are laminated. To go. The rubber layer is formed by attaching a rubber material sheet (for example, a nitrile rubber sheet) before vulcanization onto the prepreg sheet. When the rubber layer is sandwiched between two FRPs, a prepreg sheet is further attached on the rubber material sheet, and a plurality of prepreg sheets are laminated as necessary.

Next, with the prepreg sheet and the rubber material sheet attached to the mold, the entire mold is covered with a heat-resistant film and hermetically sealed. Thereafter, the inside of the heat-resistant film is degassed under reduced pressure, and in this state, heating and pressurization are performed using an autoclave (hot and pressurizing pot). The heat and pressure harden the base material M of the prepreg sheet and vulcanize the rubber material sheet to generate elasticity as rubber. After heating and pressurizing, the mold is released to complete the one-piece shoe structure 1 in which the upper portion 10 and the sole portion 20 are integrated.

(skating shoes)
FIG. 10 is a perspective view illustrating the configuration of the skate shoe 100 according to this embodiment.
A skate shoe 100 according to this embodiment has a skate blade 2 fixed to the sole portion 20 of the shoe structure 1 according to this embodiment described above. The blade 2 is fixed to the sole portion 20 with a screw (not shown). Therefore, the sole portion 20 has a thickness equal to or greater than the length of the screw.

The tongue portion 30 is arranged inside the central opening 10 h 2 of the upper portion 10 . The shoelace 3 is passed through the hole 50, and the shoelace 3 is tightened while the foot is inserted into the upper portion 10 through the upper opening 10h1. By tying the shoelace 3 on the hook 40, the shoe is firmly fitted from the tip of the foot to the ankle.

By using the shoe structure 1 according to the present embodiment as the skate shoe 100, the shoe structure 1 has a layered structure of a fiber reinforced resin layer and a rubber layer. In addition, elasticity can be imparted to the layer structure by the rubber layer. Therefore, the fiber-reinforced resin layer can provide rigidity and weight reduction, while providing flexibility like leather, and can enhance fitting to the foot.

As described above, according to the present embodiment, the shoe structure 1 and the skate shoe 100 are provided that are made of fiber-reinforced resin to achieve rigidity and weight reduction, while realizing the suppleness of leather. becomes possible.

Although the present embodiment and its application examples have been described above, the present invention is not limited to these examples. For example, in this embodiment, an example of applying the shoe structure 1 to the skate shoe 100 is shown, but it can also be applied to other shoes such as ski boots, snowboard boots, bicycle shoes, and running shoes. Moreover, the layer structure (first layer structure ST1, second layer structure ST2, third layer structure ST3, and fourth layer structure ST4) applied to the shoe structure 1 can also be applied to a structure other than the shoe structure 1. be. For example, bicycle saddles, guards for various sports (knee pads, elbow pads, chest pads, shoulder pads, etc.), helmets, supporters and auxiliary equipment for functional recovery, and other materials that require both rigidity and flexibility. It is possible.

In addition, those skilled in the art may appropriately add, delete, or change the design of the above-described embodiments or their application examples, or may combine the features of the embodiments as appropriate. As long as it has the gist, it is included in the scope of the present invention.

1 Shoe structure 2 Blade 3 Shoelace 10 Upper part 10h1 Upper opening 10h2 Central opening 20 Sole part 21 Toe part 22 Heel part 23 Arch part 30... Tongue part 31... First part 32... Second part 40... Hook 41... Crimping 50... Hole 100... Skating shoe 101... Tip part 102... Outer part 103... Inner part 104 Rear end portion 105 Upper extending portion 111 First fiber reinforced resin layer 112 Second fiber reinforced resin layer 113 First rubber layer 211 Third fiber reinforced resin layer 213 Second Rubber layer 215... Thermoplastic resin layer 231... Fourth fiber reinforced resin layer 232... Fifth fiber reinforced resin layer 233... Third rubber layer 311... Sixth fiber reinforced resin layer 312... Seventh fiber reinforced Resin layer 313... Fourth rubber layer F... Reinforcing fiber M... Base material ST1... First layer structure ST2... Second layer structure ST3... Third layer structure ST4... Fourth layer structure

Claims (12)

an upper part;
a sole portion provided on the bottom side of the upper portion and integrally molded with the upper portion,
The upper part has a first layer structure that is a layer structure including a fiber reinforced resin layer and a rubber layer,
The first layer structure is
a first fiber reinforced resin layer, which is the fiber reinforced resin layer;
a second fiber reinforced resin layer which is the fiber reinforced resin layer;
including a first rubber layer that is the rubber layer disposed between the first fiber reinforced resin layer and the second fiber reinforced resin layer,
The entire upper portion is formed by the first layer structure,
shoe structure. The sole portion has a toe portion, a heel portion, and an arch portion,
The toe portion and the heel portion have a second layer structure which is the layer structure,
The second layer structure is
a third fiber reinforced resin layer which is the fiber reinforced resin layer provided on the upper portion side;
and a second rubber layer which is the rubber layer provided on the side opposite to the upper portion of the third fiber reinforced resin layer,
Shoe structure according to claim 1. The second layer structure further includes a thermoplastic resin layer provided between the third fiber reinforced resin layer and the second rubber layer,
Shoe structure according to claim 2. The arch portion has a third layer structure which is the layer structure,
The third layer structure is
a fourth fiber reinforced resin layer which is the fiber reinforced resin layer provided on the upper portion side;
a fifth fiber reinforced resin layer which is the fiber reinforced resin layer provided on the opposite side of the fourth fiber reinforced resin layer to the upper portion;
A third rubber layer that is the rubber layer provided between the fourth fiber reinforced resin layer and the fifth fiber reinforced resin layer,
A shoe structure according to claim 2 or 3. further comprising a tongue portion attached to the upper portion,
The tongue portion has a fourth layer structure which is the layer structure,
The fourth layer structure is
a sixth fiber reinforced resin layer which is the fiber reinforced resin layer provided on the upper portion side;
and a fourth rubber layer which is the rubber layer provided on the opposite side of the sixth fiber reinforced resin layer to the upper portion,
Shoe structure according to any one of claims 1 to 4. The base material resin of the fiber reinforced resin layer in the layer structure is a thermosetting resin,
Shoe structure according to any one of claims 1 to 5. The reinforcing fiber of the fiber-reinforced resin layer in the layer structure is at least one selected from the group consisting of carbon fiber, aramid fiber, polyethylene fiber, Zylon fiber, boron fiber and glass fiber.
Shoe structure according to any one of claims 1 to 6. The rubber layer in the layer structure is nitrile rubber,
Shoe structure according to any one of claims 1 to 7. The fiber-reinforced resin layer in the layer structure has a plurality of layers of reinforcing fibers,
Shoe structure according to any one of claims 1 to 8. A hook for hanging a shoelace is directly fastened to the upper part,
Shoe structure according to any one of claims 1 to 9. The upper portion is provided with a hole through which the shoelace is passed,
Shoe structure according to claim 10. A shoe structure according to any one of claims 1 to 11;
and a blade fixed to the sole portion of the shoe structure.

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