JP2021074418A - Sole structure for shoes - Google Patents

Abstract

To provide a sole structure for a shoe which has a simple structure and improves cushion performance, stability, and durability.SOLUTION: A sole structure body provided with a sole body 20 that is a resin box-shaped member which has prescribed thickness t and defines an internal space S, is composed of: an upper wall part 20A which is placed on an upper side in a heal part area or a forefoot area corresponding to a heal part or the forefoot of a foot P of a wearer; a lower wall part 20B arranged below at intervals from the upper wall part 20A; and left and right side wall parts 20C, 20D that are arranged between upper and lower wall parts 20A, 20B and connected to upper and lower wall parts 20A, 20B. Side wall parts 20C, 20D are elastically deformably configured in a vertical direction, and between the upper and lower wall parts 20A, 20B, there are a plurality of solid or hollow ribs 20p extending in succession vertically in the vertical direction.SELECTED DRAWING: Figure 11

Description

The present invention relates to a sole structure for shoes, and more particularly to a structure capable of improving cushioning and stability and improving durability with a simple structure.

As the sole structure of the shoe, for example, Japanese Patent Application Laid-Open No. 2004-242692 describes an upper midsole made of a soft elastic member, a lower midsole made of a soft elastic member arranged below the upper midsole, and an upper and lower mids. A corrugated plate made of a hard elastic member provided between the soles is described (see paragraph [0025]). The upper and lower midsole is made of an ethylene-vinyl acetate copolymer (EVA) foam or the like, and the corrugated plate is made of a hard synthetic rubber or the like (see paragraphs [0026] to [0027]).

In the above-mentioned conventional sole structure, cushioning property can be maintained by compressive deformation of the upper and lower midsole made of a soft elastic member at the time of landing. On the other hand, when the upper and lower midsole is compressively deformed, the corrugated plate made of a hard elastic member suppresses the compressive deformation of the entire upper and lower midsole, thereby improving the stability at the time of landing.

However, in the above-mentioned conventional configuration, it is necessary to provide a corrugated plate in addition to the upper and lower midsole, and the structure is complicated. In addition, a separate molding process and bonding process for the corrugated plate are required, which increases the manufacturing cost.

The present invention has been made in view of such conventional circumstances, and the problem to be solved by the present invention is a shoe sole that can improve cushioning and stability with a simple structure and can improve durability. To provide the structure. The present invention also seeks to provide a shoe sole structure that can improve cushioning, stability and durability and reduce manufacturing costs. Furthermore, the present invention seeks to provide a shoe sole structure that can control cushioning and stability with a simple structure.

The shoe sole structure according to the present invention has a heel region or a forefoot region corresponding to the heel or forefoot of the wearer's foot, respectively, and is arranged on the upper side at least in the heel region or the forefoot region. The lower wall portion arranged on the lower side with a space between the upper wall portion and the upper wall portion, and the left and right side wall portions disposed between the upper and lower wall portions and connected to the upper and lower wall portions. Have. The upper and lower wall portions and the side wall portions form a resin box-shaped member having a predetermined thickness and defining an internal space. The side wall portion is configured to be elastically deformable in the vertical direction, and has a plurality of solid or hollow ridge portions extending substantially continuously in the vertical direction between the upper and lower wall portions.

According to the present invention, the box-shaped member constituting the sole structure by the upper and lower wall portions and the side wall portion has an internal space, and the side wall portion is configured to be elastically deformable in the vertical direction. Cushioning can be exhibited by compressing and deforming and elastically deforming the side wall in the vertical direction. Further, since the sole structure is composed of a box-shaped member having a predetermined thickness, the upper and lower wall portions suppress the compressive deformation of the side wall portion when the side wall portion is elastically deformed, thereby improving the stability at the time of landing. it can. Further, since the sole structure is formed by forming the resin upper wall portion, lower wall portion and side wall portion in a box shape, the structure can be simplified and the manufacturing cost can be reduced.

Moreover, according to the present invention, since the side wall portion has a plurality of solid or hollow ridge portions extending substantially continuously in the vertical direction between the upper and lower wall portions, the side wall portion is formed by these ridge portions. The rigidity of the portion can be improved, and the durability of the side wall portion and the entire sole structure can be improved. Further, the amount of elastic deformation of the side wall portion can be adjusted by the ridge portion, whereby the cushioning property and stability of the side wall portion and the sole structure as a whole can be controlled.

In the present invention, the side wall portion has a round shape protruding laterally between the upper and lower wall portions. In this case, the side wall portion is easily deformed toward the side when a load is applied at the time of landing, and is also easily deformed back, whereby the cushioning property of the side wall portion can be improved.

In the present invention, the ridge portion is provided on the inner and outer instep sides of the side wall portion in the heel portion region or the tread portion region of the forefoot portion region. In this case, in the heel region where the load acts when the heel lands, or in the tread region where the load acts when the forefoot lands, the heel is provided by providing a ridge on the side wall on the inner and outer instep sides. The rigidity of the side wall portion and thus the sole structure with respect to the landing or the landing of the forefoot can be effectively improved, and the durability can be effectively improved.

In the present invention, the ridge portion is arranged along the entire circumference of the side wall portion of the heel portion region or the forefoot portion region. In this case, the rigidity of the side wall and the sole structure can be improved not only for the heel striker landing from the heel and the forefoot striker landing from the forefoot, but also for the midfoot striker landing from the midfoot. , Durability can be improved, and snappyness (that is, quickness) at the time of kicking at the toe can be improved.

In the present invention, the ridge portion extends to the lower surface of the lower wall portion, and the lower surface of the ridge portion forms a ground contact surface that contacts the road surface together with the lower surface of the lower wall portion. In this case, since the lower surface of the lower wall portion forms the ground contact surface, it is not necessary to provide the ground contact surface separately from the lower wall portion, whereby the structure of the entire sole structure can be simplified. Further, since the lower surface of the ridge portion forms the ground contact surface, the anti-slip property and grip property of the ground contact surface can be improved, the area of the entire ground contact surface can be increased, and the landing stability can be improved.

In the present invention, the lower wall portion has a tapered portion or a round portion that gradually rises upward toward the side wall portion in the inner and outer instep side portions of the heel portion region. In this case, the tapered portion or the round portion sinks downward when a load is applied at the time of heel landing, so that the heel portion region sinks downward and is easily deformed, thereby providing cushioning property at the time of heel landing. It can be further improved.

In the present invention, the side wall portion has an out-counter portion that extends upward beyond the upper surface of the upper wall portion in the heel portion region and is arranged along the circumference of the heel portion region. In this case, since the heel portion of the foot can be supported by the out counter portion, the stability at the time of heel landing can be further improved.

In the present invention, the out-counter portion has a plurality of solid or hollow ridge portions extending substantially continuously in the vertical direction. In this case, since the rigidity of the out-counter portion can be improved by the ridge portion, the holdability of the heel portion of the foot can be improved during exercise.

In the present invention, the sole structure has a vent that communicates with the internal space. In this case, the air in the internal space is exhausted to the outside through the ventilation holes, and the outside air is introduced into the internal space through the ventilation holes, so that the inside of the shoes can be ventilated.

In the present invention, two or more ventilation holes are provided, and each ventilation hole penetrates one or more of the upper wall portion, the lower wall portion, and the side wall portion. In this case, one of the ventilation holes functions as an intake hole (intake hole) for outside air to the internal space, and the other ventilation hole functions as an exhaust hole (exhaust hole) for air from the internal space. The inside can be efficiently ventilated.

In the present invention, the ventilation holes communicate with the internal space through the hollow ridges. In this case, the inside of the hollow ridge can be used as a passage for ventilation.

In the present invention, the upper end of the hollow ridge portion is open. In this case, not only the inside of the hollow ridge can be used as a passage for ventilation, but also the opening at the upper end of the ridge can be used as a ventilation hole so that the ventilation hole can be used outside the upper of the shoe. Since it can be placed, it becomes easy to introduce fresh outside air into the shoe, and since the ventilation hole can be placed at the upper end of the sole structure, dirt, sand, water, etc. can enter the ventilation hole from the outside. Can be prevented.

In the present invention, a three-dimensional elastic structure made of resin fibers is arranged in the internal space. Thereby, the elasticity of the entire sole structure can be adjusted.

In the present invention, the three-dimensional elastic structure is molded by a 3D printer together with the upper and lower wall portions and the side wall portions. As a result, the upper and lower wall portions, the side wall portions, and the three-dimensional elastic structure can be integrally molded, so that the manufacturing cost can be reduced.

In the present invention, the 3D printer is a fused deposition modeling method.

The method for manufacturing a sole structure for shoes according to the present invention includes the following steps.
i) A wearer data acquisition process that acquires personal data, including foot data for at least the heel or forefoot of the wearer's foot and the wearer's weight.
ii) Based on the foot data and personal data acquired in the wearer data acquisition process, the thickness of the upper and lower walls and side walls, the shape of the box-shaped member, the size of the ridges, the structure and arrangement pitch, and three dimensions. Sole design process for designing elastic structures.
iii) A process of molding a box-shaped member and a three-dimensional elastic structure designed in the sole design process with a 3D printer.

According to the present invention, based on the wearer's actual foot data and personal data, the thickness of the upper and lower walls and the side walls, the shape of the box-shaped member, the size of the ridges, the structure and the arrangement pitch, and the three dimensions. Since the structure of the elastic structure is designed, it is possible to realize a sole structure of a personal fit customized according to the wearer's individual feet, weight, and the like. Further, since the sole body and the three-dimensional elastic structure are molded by a 3D printer, the manufacturing cost can be reduced.

As described above, according to the present invention, the internal space is compressively deformed at the time of landing, and the side wall portion is elastically deformed in the vertical direction, so that cushioning property can be exhibited, and at the time of elastic deformation of the side wall portion, the upper and lower wall portions. However, by suppressing the compressive deformation of the side wall portion, the stability at the time of landing can be improved. Further, since the sole structure is formed by forming the resin upper wall portion, lower wall portion and side wall portion in a box shape, the structure can be simplified and the manufacturing cost can be reduced. Moreover, according to the present invention, since the side wall portion has a plurality of solid or hollow ridge portions extending substantially continuously in the vertical direction between the upper and lower wall portions, the side wall portion is formed by these ridge portions. The rigidity of the portion can be improved, and the durability of the side wall portion and the entire sole structure can be improved. Further, the amount of elastic deformation of the side wall portion can be adjusted by the ridge portion, whereby the cushioning property and stability of the side wall portion and the sole structure as a whole can be controlled.

It is the whole perspective view which looked at the shoe (for right foot) with the sole structure by one Example of this invention from the diagonally rear side upper side of the inner instep side. It is a side view of the inner instep side of the shoe (FIG. 1). It is a rear end view of the heel of the shoe (FIG. 1). It is a top view of the shoe (FIG. 1). It is a bottom view of the shoe (FIG. 1). FIG. 1 is an overall perspective view of the sole structure (FIG. 1) in a state where the upper is removed from the shoe (FIG. 1) as viewed from diagonally rearward and upper side on the outer instep side. It is a side view of the inner instep side of the sole structure (FIG. 6), and is the figure corresponding to FIG. It is a rear end view of the heel of the sole structure (FIG. 6), and is the figure corresponding to FIG. It is a figure which shows the modification of FIG. It is a figure which shows the other modification of FIG. It is a plan view of the sole structure (FIG. 6) and corresponds to FIG. It is a bottom view of the sole structure (FIG. 6), and is the figure corresponding to FIG. 9 and 10 (or 17) are schematic cross-sectional views taken along the line XI-XI, showing a state in which the wearer's feet are placed. From the state of FIG. 11, the state in which the landing load of the foot is applied is shown. It is a figure which shows the modification of FIG. 11, and shows the state which the wearer's foot rests on. From the state of FIG. 13, the state in which the landing load of the foot is applied is shown. It is a figure which shows the other modification of FIG. 11, and shows the state which the wearer's foot rests on. From the state of FIG. 15, the state in which the landing load of the foot is applied is shown. FIG. 11 is a schematic cross-sectional view taken along the line XVII-XVII of FIG. It is a figure which shows the modification of FIG. FIG. 17 is a diagram showing a state in which a three-dimensional elastic structure made of resin fiber is provided in the internal space. FIG. 18 is a diagram showing a state in which a three-dimensional elastic structure made of resin fiber is provided in the internal space. It is a perspective partial view of the three-dimensional elastic structure (FIGS. 19 and 20) viewed from diagonally above. It is a figure which shows the modification of the three-dimensional elastic structure (FIG. 21). It is a figure which shows the other modification of the three-dimensional elastic structure (FIG. 21). It is a plane schematic diagram for demonstrating the basic module which comprises the three-dimensional elastic structure (FIG. 23). FIG. 5 is a schematic plan view of a first pattern arranged in the uppermost layer (first layer) of the basic module (FIG. 24). FIG. 6 is a schematic plan view of a second pattern arranged in the immediately lower layer (second layer) of the first layer in the basic module (FIG. 24). FIG. 6 is a schematic plan view of a third pattern arranged in the immediately lower layer (third layer) of the second layer in the basic module (FIG. 24). FIG. 6 is a schematic plan view of a fourth pattern arranged in the immediately lower layer (fourth layer) of the third layer in the basic module (FIG. 24). It is a flowchart which shows an example of the manufacturing process of the sole structure for shoes by this invention. It is a figure which shows the modification of the sole structure (FIG. 6), and is the whole perspective view which looked at the sole structure from the diagonally front side upper side of the inner shell side. It corresponds to the cross section of FIG. 26, and is a diagram for explaining the position of the ventilation hole.

Hereinafter, examples of the present invention will be described with reference to the accompanying drawings.
1 to 10 are external views for explaining a sole structure according to an embodiment of the present invention and a shoe provided with the sole structure. Here, running shoes are taken as an example of shoes. In the following description, the upper (upper / upper) and lower (lower / lower) represent the vertical positional relationship of the shoes, and the front (front / front) and rear (rear / rear) are used. , The positional relationship of the shoes in the front-rear direction is shown, and the width direction refers to the left-right direction of the shoes. That is, when the bottom surface of the shoe is arranged on a horizontal plane as shown in FIGS. 2 and 7, the upper and lower directions refer to the upper and lower sides of each figure, and the front and rear directions are respectively. It points to the left and right sides of each figure, and the width direction points to the depth direction of the paper surface of each figure.

As shown in FIGS. 1 to 5, the shoe 1 includes a sole structure 2 and an upper 3 provided on the sole structure 2 to cover the wearer's feet. The sole structure 2 has a heel region H, a midfoot region M, and a forefoot region F corresponding to the heel, midfoot (arch of the foot), and forefoot, respectively, from the rear end of the heel. It extends in the front-back direction to the toe and extends in the width direction. In this example, the upper 3 is a sock type in which the entire upper including the cuff is made of elastic knit fabric, which improves the fit to the foot.

As shown in FIGS. 6 to 10, the sole structure 2 has a sole body 20 having a heel region H, a midfoot region M, and a forefoot region F. The sole body 20 has a sole contact surface 20a on the upper surface, which the wearer's sole directly or indirectly contacts via an insole or the like (not shown). The sole contact surface 20a preferably forms a curved surface that is gently curved in the front-rear direction so as to follow the shape of the sole of the wearer.

The out counter portion 21 which is arranged on the upper side of the sole main body 20 and extends along the circumference of the heel portion region H is arranged mainly in the heel portion region H of the sole main body 20. The out-counter portion 21 rises upward from the sole contact surface 20a of the sole body 20 so as to surround and support the circumference of the heel portion of the wearer's foot. This can improve the stability at the time of heel landing. The shoe 1 is manufactured by fixing the lower part of the upper 3 to the sole contact surface 20 and the out counter portion 21 by adhesion or the like.

A large number of columnar protrusions 20bp are planted on the lower surface 20b of the sole body 20 (see FIG. 5), and each columnar protrusion 20bp is provided integrally with the lower surface 20b. In this example, as the columnar protrusion 20bp, a columnar protrusion having a circular cross-sectional shape is used, but the cross-sectional shape is not limited to a circular shape, and may be an elliptical shape, a hexagonal shape, an octagonal shape, or the like. It may be a polygonal shape of.

A plurality of ribs (protruding portions) 20p extending substantially continuously in the vertical direction in a columnar shape are provided on the outer peripheral surface of the sole body 20. In this example, each rib 20p is arranged from the heel region H through the midfoot region M to the forefoot region F on both the inner and outer instep sides of the sole body 20, and is arranged after the heel of the heel region H. It is arranged around the end portion and around the toe portion of the forefoot region F, and is provided over the entire circumference of each of the heel region H, the midfoot region M, and the forefoot region F. Further, in this example, as the rib 20p, a cylindrical (or semicircular) protrusion having a circular (or semicircular) cross section is used, but the cross section is limited to a circular or semicircular shape. It may be elliptical, or may be a polygonal shape such as a hexagonal shape or an octagonal shape.

As shown in FIG. 7, in this example, each rib 20p is viewed from the side surface direction on the inner instep side (the same applies to the side surface direction on the outer instep side), and the heel region H is formed from the anterior-posterior front to the midfoot region M. In the region extending through the forefoot region F from the anterior-posterior posterior portion, the region generally extends in the vertical direction, and in the region of the heel region H from the anterior-posterior anterior portion to the heel posterior end, gradually extending backward. In the region from the anterior-posterior rear portion to the toe portion of the forefoot region F, the forefoot region F gradually inclines and extends rearward as it goes forward. Collectively, in the present specification, the extending direction of each rib 20p is substantially the vertical direction. Further, as shown in FIG. 8, each rib 20p extends substantially in the vertical direction when viewed from the rear end side of the heel in this example. Similarly, a plurality of ribs (protruding portions) 20p'extending substantially in a columnar shape in the vertical direction are provided on the outer peripheral surface of the out counter portion 21.

As shown in FIG. 11 which is a cross-sectional view taken along the line XI-XI of FIGS. 9 and 10, the sole body 20 is below the upper wall portion 20A arranged on the upper side with a space between the upper wall portion 20A and the upper wall portion 20A. The lower wall portion 20B arranged on the side and the upper wall portion 20A and the lower wall portion 20B substantially extend in the vertical direction and are connected to the upper and lower wall portions 20A and 20B, and the upper and lower wall portions 20A and 20B It has left and right side wall portions 20C and 20D extending substantially in the front-rear direction along the outer periphery. FIG. 11 shows an example of a cross section passing through each rib 20p of the side wall portions 20C and 20D and each columnar protrusion 20bp of the lower wall portion 20B, and in the figure, the out counter portion 21 is omitted. ing. Further, in the figure, for convenience of illustration, hatching representing a cross section is omitted.

The upper and lower wall portions 20A and 20B and the side wall portions 20C and 20D form a resin box-shaped member, and the sole body 20 has a box structure (or outer shell structure) inside the sole body 20. The interior space S, which is a closed space surrounded by these wall portions 20A to 20D, is defined. Such a hollow box structure is formed not only in the heel region H of the sole body 20, but also in the midfoot region M and the forefoot region F. As a result, the shape retention is maintained throughout the sole body 20. As the resin constituting the sole body 20, for example, a thermoplastic resin such as nylon, polyester, TPU (thermoplastic polyurethane), PU (polyurethane), rubber, or the like is used.

The upper and lower wall portions 20A and 20B and the side wall portions 20C and 20D have a predetermined thickness t. The thickness t is preferably set to 1 mm or more and 3 mm or less. As shown in FIG. 11 and FIG. 17 which is a cross section thereof in line XVII-XVII, the insides of the rib 20p and the columnar protrusion 20bp are both hollow, and the weight is reduced. Similarly, the inside of the rib 20p'is also hollow. The rib 20p extends below the lower surface 20b of the lower wall portion 20B, and the lower surface of the rib 20p forms a ground contact surface that contacts the road surface together with the lower surface of the columnar protrusion 20bp. Further, as shown in FIG. 17, when the diameter of the rib 20p which is a semi-cylindrical protrusion is d and the distance between the adjacent ribs 20p is e, it is preferable.
d> e
The relationship is established.

The upper surface of the upper wall portion 20A constitutes the sole contact surface 20a. Here, the sole contact surface 20a is composed of a concave curved surface. A large number of columnar protrusions 20bp are provided on the lower surface 20b of the lower wall portion 20B. The side wall portions 20C and 20D are provided so as to be elastically deformable in the vertical direction, and preferably have a round shape protruding outward. In the heel region H, the round shape of each of the side wall portions 20C and 20D extends to the heel rear end side, and the heel rear end surface of the side wall portions 20C and 20D also has a round shape (see FIG. 7). The ribs 20p described above are provided on the side wall portions 20C and 20D along the entire circumference of the side wall portions 20C and 20D, and the ribs 20p are similarly outward along the round shape of the side wall portions 20C and 20D. It has a round shape that protrudes toward. Each rib 20p is continuously extended in the vertical direction between the upper wall portion 20A and the lower wall portion 20B without interruption. In the above-mentioned out counter portion 21 (FIGS. 7 and 8), the side wall portions 20C and 20D extend upward beyond the upper surface (that is, the sole contact surface 20a) of the upper wall portion 20A in the heel portion region H. It is composed by setting.

Next, the action and effect of this example will be described.
As described above, since the sole structure 2 has the sole body 20 formed in a box shape by the upper and lower wall portions 20A and 20B and the side wall portions 20C and 20D (see FIG. 11), from the foot P at the time of landing. When a load is applied, as shown in FIG. 12, the internal space S of the sole body 20 is compressively deformed, and the side wall portions 20C and 20D are elastically deformed in the vertical direction, whereby cushioning property can be exhibited.

In particular, in this case, since the side wall portions 20C and 20D have a round shape protruding laterally between the upper and lower wall portions 20A and 20B, the side wall portions 20C and 20D move outward when a load is applied at the time of landing. The cushioning properties of the side wall portions 20C and 20D can be improved because the side wall portions 20C and 20D are easily deformed toward the side and are easily deformed back. Further, since the sole body 20 is composed of a box-shaped member having a predetermined thickness t, the upper and lower wall portions 20A and 20B suppress the compressive deformation of the side wall portions 20C and 20D when the side wall portions 20C and 20D are elastically deformed. This makes it possible to improve the stability at the time of landing. Further, since the sole main body 20 is formed by forming the resin upper wall portion 20A, the lower wall portion 20B, and the side wall portions 20C, 20D in a box shape, the structure can be simplified and the manufacturing cost can be reduced.

Moreover, since the side wall portions 20C and 20D have a plurality of ribs 20p extending substantially continuously in the vertical direction between the upper and lower wall portions 20A and 20B, the rigidity of the side wall portions 20C and 20D is increased by these ribs 20p. It can be improved, and the durability of the side wall portions 20C and 20D, and thus the sole structure as a whole can be improved. Further, the amount of elastic deformation of the side wall portions 20C and 20D can be adjusted by the rib 20p, whereby the cushioning property and stability of the side wall portions 20C and 20D and the sole structure as a whole can be controlled.

Further, the rib 20p extends to the lower surface 20b of the lower wall portion 20B, and the lower surface of the rib 20p forms a ground contact surface that comes into contact with the road surface together with the lower surface 20b of the lower wall portion 20B. In this case, since the lower surface 20b of the lower wall portion 20B forms the ground contact surface, it is not necessary to provide the ground contact surface separately from the lower wall portion 20B, thereby simplifying the structure of the entire sole structure. Can be changed. Further, since the lower surface of the rib 20p forms the ground contact surface, the anti-slip property and grip property of the ground contact surface can be improved, the area of the entire ground contact surface can be increased, and the landing stability can be improved.

[Other Example 1]
In the above embodiment, the sole body 20 is extended from the heel region H through the midfoot region M to the forefoot region F (see FIGS. 6 to 10), but the sole body 20 is at least It may be arranged in the heel region H or the forefoot region F. That is, the sole body 20 is arranged only in the heel region H, only in the forefoot region F, in the region from the heel region H to the midfoot region M, or in the region from the forefoot region H to the midfoot region M, and the like. Will be done.

[Other Example 2]
In the above embodiment, the rib 20p extends along the entire circumference of the side wall portions 20C and 20D in the region from the heel region H to the midfoot region M to the forefoot region F (that is, over the entire length of the shoe). Although the provided examples are shown (see FIGS. 6 to 10), the application of the present invention is not limited to this. The rib 20p may be provided on the entire circumference of the side wall portion 20C and / or 20D or a part thereof (for example, only the inner and outer instep side portions) only in the heel portion region H. Since the heel region H is a region on which a load acts at the time of heel landing, the rigidity of the sole structure 2 with respect to the heel landing is provided by providing ribs 20p on the side wall portions 20C and 20D on the inner and outer instep sides of the heel region H. Can be effectively improved, and durability can be effectively improved.

Further, the rib 20p may be provided on the entire circumference of the side wall portion 20C and / or 20D or a part thereof (for example, only the inner / outer instep side region or only the tread portion region) in the forefoot portion region F only. The stepping portion region is shown in the shaded region Bf in FIG. 9 of the above embodiment, and is a region including mainly the ball of the toe and the ball of the toe and the surrounding region of the foot, and the rib 20p. May be provided only in the inner instep side portion Bf ₁ and / or the outer instep side portion Bf _{2 of the stepping portion region Bf.} Since the tread area Bf is a region on which a large load acts when landing in the forefoot area F, the ribs 20p are provided on the side wall portions 20C and 20D on the inner and outer instep sides of the tread area Bf, so that the forefoot is provided. The rigidity of the sole structure can be effectively improved with respect to the partial landing, and the durability can be effectively improved.

[Other Example 3]
In the above-described embodiment, the arrangement direction of the rib 20p has been described with reference to FIGS. 7 and 8, but the arrangement direction of the rib 20p is not limited to those shown in these figures. The ribs 20p may be arranged in a direction different from those in FIGS. 7 and 8, and the ribs 20p may be arranged so as to be inclined in the same direction. Further, in the above-described embodiment, an example in which the ribs 20p are arranged at a substantially constant arrangement pitch in the front-rear direction is shown, but the application of the present invention is not limited to this. By changing the length of the arrangement pitch, for example, the arrangement pitch is shortened in the heel region H, the tread region Bf, and the midfoot region M so that the ribs 20p are densely arranged, or the ribs 20p are arranged in other regions. The pitch may be lengthened so that the ribs 20p are sparsely arranged. Further, in the above-described embodiment, the diameter d of each rib 20p is substantially the same, but the diameter d of each rib 20p does not have to be the same.

[Other Example 4]
In the above embodiment, by providing a plurality of ribs 20p'on the outer peripheral surface of the out counter portion 21 arranged on the upper side of the sole body 20, the rigidity of the out counter portion 21 is improved, and the heel portion of the foot is formed during exercise. An example is shown in which the holdability is improved (see FIGS. 6 to 9), but as shown in FIG. 8A, these ribs 20p'can be omitted. Further, as shown in FIG. 8B, the out counter unit 21 itself may not be provided.

[Other Example 5]
In the above embodiment, in the cross-sectional shape of the sole body 20, the lower surface 20b (or the lower surface of the rib 20p and the columnar protrusion 20bp) of the lower wall portion 20B is extended substantially linearly in the sole width direction. (See FIGS. 11 and 12), the application of the present invention is not limited to this, and the sole body 20 according to the present invention may have a cross-sectional shape as shown in FIGS. 13 to 16. In these figures, the ribs 20p and the columnar protrusions 20bp are omitted for simplification of the illustration, and the upper and lower wall portions 20A and 20B and the side wall portions 20C and 20D are shown by thick lines.

The example shown in FIG. 13 differs from the above embodiment in that a _{tapered portion 20B 1} that gradually rises upward toward the side wall portions 20C and 20D is formed on the inner and outer instep side portions of the lower wall portion 20B. ing. In this case, when a load is applied from the foot P at the time of landing, as shown in FIG. 14, each tapered portion 20B ₁ sinks downward, so that the side wall portions 20C and 20D are easily elastically deformed downward. As a result, higher cushioning properties can be exhibited.

Further, the example shown in FIG. 15 is different from the above embodiment in that the _{round portion 20B 2} is formed on the inner and outer instep side portions of the lower wall portion 20B. In this case, when a load is applied from the foot P at the time of landing, as shown in FIG. 16, each round portion 20B ₂ is deformed so as to sink downward (or become flatter), so that the side wall portion 20C, The 20D is easily elastically deformed downward, which makes it possible to exhibit higher cushioning properties.

[Other Example 6]
In the above embodiment, an example in which each rib 20p is hollow is shown (see FIG. 17), but the application of the present invention is not limited to this. Each rib 20p may be solid as shown in FIG. Similarly, although each columnar projection 20bp is hollow in the above embodiment (see FIGS. 11 and 12), each columnar projection 20bp may be solid. Further, each rib 20p'may also be solid.

[Other Example 7]
In the above-described embodiment, an example in which the internal space S of the sole body 20 is hollow is shown, but the application of the present invention is not limited to this. As shown in FIGS. 19 and 20, the three-dimensional elastic structure 5 made of a resin fiber (resin filament) may be accommodated in the internal space S. As shown in FIGS. 19 and 20, the three-dimensional elastic structure 5 has a large number of resin filaments 5a extending in one direction arranged in parallel at intervals in a horizontal plane and intersects the one direction (for example,). A large number of resin filaments 5b extending in the (orthogonal) direction are arranged at intervals in the horizontal plane and intersect with the filaments 5a to form one resin layer (layer) in the horizontal plane. Is configured to be laminated in the vertical direction to superimpose a large number of layers, and is a filament structure.

The three-dimensional elastic structure 5 is preferably modeled (molded / 3D printed) by a 3D printer. As the 3D printer, an FDM (Fused Deposition Modeling) method is preferably used. Examples of the resin used in this method include, like the sole body 20, thermoplastic resins such as nylon, polyester, TPU (thermoplastic polyurethane), PU (polyurethane), and thermoplastic elastomer, rubber, and the like. A soft material is preferable, and a soft material of 90 A or less on the Asker A scale is more preferable. In this case, the three-dimensional elastic structure 5 becomes a soft filament structure.

At the time of molding the three-dimensional elastic structure 5, the sole body 20 is also molded at the same time. That is, the internal three-dimensional elastic structure 5 is integrally molded (simultaneously printed) at the time of molding the sole main body 20 including the upper and lower wall portions 20A and 20B and the both side wall portions 20C and 20D. As a result, the work of arranging and fixing the three-dimensional elastic structure 5 in the internal space S of the sole body 20 becomes unnecessary, and the cost can be reduced. Preferably, when the sole body 20 is molded, the out counter portion 21 is also integrally molded (simultaneously printed). As a result, the sole structure 2 can be molded at once with a 3D printer, so that the manufacturing process can be simplified and the cost can be further reduced. Further, when the sole body 20 is molded, it is molded based on the foot information (three-dimensional data of the foot (foot length, foot width, arch height, sole shape, etc.), foot pressure distribution, etc.) acquired from each wearer. By doing so, you will be able to achieve a personal-fitting sole that is customized to fit the individual wearer's foot.

Even in this case, when a load W acts on the sole body 20 from the wearer's foot P at the time of landing (see FIG. 12), the internal space S is compressively deformed, and the side wall portions 20C and 20D are elastically compressed and deformed downward. , Cushioning property can be improved, soft landing can be realized, and the upper and lower wall portions 20A and 20B suppress the compressive deformation of the entire sole structure when the side wall portions 20C and 20D are elastically deformed, thereby stabilizing the landing. Not only can the above be improved, but also the compressive deformation of the entire sole structure can be adjusted by the elastic deformation of the three-dimensional elastic structure 5 housed in the internal space S. In this way, both cushioning and stability of the sole structure 2 can be achieved.

[Other Example 8]
The structure of the three-dimensional elastic structure 5 is not limited to that shown in the other Example 7, and various other structures may be adopted.
In the example shown in FIG. 21, a gap is formed between the resin filaments adjacent to each other in the vertical direction, but in the example shown in FIG. 22, a gap is formed between the resin filaments adjacent to each other in the vertical direction. Instead, a flat wall-shaped member is extended in the vertical direction, and a large number of wall-shaped members intersect with each other. Further, in the example shown in FIG. 23, a large number of resin layers (layers) in which resin filaments are arranged in a polygonal shape in a horizontal plane are laminated in the vertical direction.

FIG. 24 is a schematic plan view for explaining the basic module 50 constituting the three-dimensional elastic structure 5 shown in FIG. 23. Although other basic modules can be considered, those taken out for the convenience of understanding the structure separately from the manufacturing process are used here. The basic module 50 is arranged in the uppermost layer (first layer) as shown in FIG. 24A, and has a first pattern 51 shown by a solid line and a layer immediately below the first layer (as shown in FIG. 24B). The second pattern 52 arranged in the second layer) and shown by the alternate long and short dash line, and as shown in FIG. 24C, arranged in the immediately lower layer (third layer) of the second layer and shown by the alternate long and short dash line. As shown in FIG. 24D, it is composed of a third pattern 53 and a fourth pattern 54 arranged in the immediately lower layer (fourth layer) of the third layer and shown by a dotted line. Each of the first to fourth patterns is composed of a resin filament (resin fiber). As the resin filament, for example, one having a wire diameter of 0.3 to 0.5 mm is used.

As shown in FIG. 24A, the first pattern 51 has a pair of octagonal frame bodies 51a arranged at intervals, and a quadrangular frame body 52a arranged between the frame bodies 51a. Some of the frames constituting the frame 52a are shared with the frames of the respective frame 51a. As shown in FIG. 24B, the second pattern 52 has a pair of quadrangular frame bodies 51b arranged at intervals and chamfered at each vertex, and a quadrangular shape arranged between the frame bodies 51b. It has a frame body 52b, and a part of the frames constituting the frame body 52b is shared with the frame of each frame body 51b. As shown in FIG. 24C, the third pattern 53 has a quadrangular shape arranged between a pair of quadrangular frame bodies 51c arranged at intervals and each frame body 51c, and each apex is chamfered. It has a frame body 52c, and a part of the frames constituting the frame body 52c is shared with the frame of each frame body 51c. As shown in FIG. 24D, the fourth pattern 54 has a pair of quadrangular frame bodies 51d arranged at intervals and an octagonal frame body 52d arranged between the frame bodies 51d. Some of the frames constituting the frame 52d are shared with the frames of the respective frame 51d.

The first to fourth layers of the three-dimensional elastic structure 5 are configured by arranging the first to fourth patterns 51 to 54 so as to spread them without gaps in each layer. The three-dimensional elastic structure 5 is formed by laminating the first to fourth layers in the vertical direction. Further, with respect to the region below the fourth layer, the third pattern 53 and the second pattern 52 are arranged in this order, and the first to fourth patterns 51 to 54 are repeated in ascending and descending order in the same manner. ..

As described above, in the three-dimensional elastic structure 5, thin resin filaments are extended in the front-rear and left-right directions at predetermined intervals to form each layer in the horizontal plane, and these layers are formed in the vertical (thickness) direction. A three-dimensional filament structure is constructed by being connected to. Therefore, not only can it exhibit good elasticity in all directions, not only in the front-back, left-right, and up-down directions, but it is also possible to dramatically reduce the weight as compared with conventional materials such as EVA and rubber.

Next, an example of the manufacturing process of the sole structure 2 incorporating the three-dimensional elastic structure 5 described above will be described with reference to the flowchart of FIG.
This flowchart is processed according to, for example, a program pre-installed in the memory of a personal computer (not shown). When the program starts, in step S1 of FIG. 25, the wearer data including at least the foot data of the wearer's foot at least the heel or the forefoot and personal data such as the wearer's weight is acquired. The foot data includes three-dimensional data of the foot (foot length, foot width, arch height, sole shape, etc.), foot pressure distribution, and the like. As personal data, in addition to body weight, the wearer's running habits (heel striker / midfoot striker / forefoot striker type) may be incorporated.

Next, in step S2, the sole structure is designed based on the wearer data acquired in step S1. In that case, in addition to the size and shape of the sole, the thickness of the upper wall portion, the lower wall portion and the side wall portion (eg: 1 mm), the shape of the box-shaped member, and the size of the ridge portion (eg). : Diameter 3mm) ・ Structure (solid / hollow type) ・ Arrangement pitch, and design the 3D elastic structure inside the sole. When designing a three-dimensional elastic structure, consider not only static information when the wearer is in a standing position, but also dynamic information when running, for example (pronation tendency / supination tendency, etc.). You may. Next, in step S3, the sole and the three-dimensional elastic structure designed in step S2 are molded (printed) by a 3D printer. When molding with a 3D printer, not only the bottom surface of the sole structure is molded in a horizontal position so that it is placed on a horizontal plane, but also the rear end surface of the heel of the sole structure is placed upright so that it is placed on a horizontal plane. It may be molded in a (or diagonal) standing position.

According to the present invention, the sole and the three-dimensional elastic structure inside the sole are designed based on the wearer's data including the wearer's actual foot data and personal data, so that the sole and the three-dimensional elastic structure inside the sole are designed corresponding to the wearer's individual feet. A customized personal fit sole structure can be realized. Further, since the sole and the three-dimensional elastic structure are integrally molded (simultaneously printed) by a 3D printer, the manufacturing cost can be reduced.

[Other Example 9]
FIG. 26 shows another embodiment of the present invention, and is a diagram corresponding to FIG. 6 of the embodiment. As shown in FIG. 26, one or a plurality of ventilation holes 20h ₁ communicating with the internal space S are formed on the sole contact surface 20a of the sole body 20, and similarly, the outer peripheral surface is internally formed. One or more ventilation holes 20h ₂ communicating with the space S are formed. As shown in FIG. 26A, the ventilation hole 20h ₁ penetrates the upper wall portion 20A, and the ventilation hole 20h ₂ penetrates the side wall portion 20D. The lower wall portion 20B is formed _{with one or more ventilation holes 20h 3} that penetrate the lower wall portion 20B and communicate with the internal space S. 26A is a cross-sectional view of FIG. 26, but for convenience of illustration, all vents are shown in one cross-sectional view. The upper end of the hollow ribs 20p is open, thereby, the opening of the upper end may function as vents 20h _4. At this time, the ventilation holes 20h ₄ communicate with the internal space S through the internal passage of the hollow rib 20p.

It is not necessary that all of these ventilation holes 20h ₁ , 20h ₂ , 20h ₃ , and 20h ₄ are provided, and at least one of these may be provided. Therefore, at least one ventilation hole may be provided in at least one of the upper wall portion 20A, the lower wall portion 20B, the side wall portion 20C (or 20D), or the rib 20p.

By providing such a ventilation hole, when the sole body 20 is compressed and deformed, the air in the internal space S is exhausted to the outside through the ventilation hole (at this time, the ventilation hole functions as an exhaust hole), and the sole body 20 is provided. At the time of return deformation, the outside air is introduced into the internal space S through the ventilation holes (at this time, the ventilation holes function as intake holes). Thus, for example, in the forefoot region F to form a vent hole 20h ₁ in sole contact surface 20a, when forming the ventilation holes 20h ₁ in the heel region H is at the heel landing is the heel region H the internal space S is compressed and deformed, as a result, are discharged air from the vents 20h ₁ side in the interior of the shoe forefoot region F, can be vented inside the forefoot region of the shoe. Next, when the load is transferred to the forefoot region F, the internal space S of the forefoot region F is compressed and deformed, and as a result, air is discharged to the inside of the shoe from _{the ventilation hole 20h 1 of the heel region H.} The inside of the heel area of the shoe can be ventilated.

Further, the ventilation holes 20h ₄ are arranged outside the upper of the shoe so that fresh outside air can be easily introduced into the upper and are arranged at the upper end of the sole structure 2. Therefore, it is possible to prevent soil, sand, water, etc. from entering from the outside. It is not necessary to mold the vent hole 20h ₄ so that the upper end is opened when the rib 20p is molded. When molding the rib 20p, the upper end of the ventilation hole 20h ₄ is set as a closed end, and the upper end is rearward after molding. It may be made into an open end by cutting it by processing or melting it by heat.

<Other variants>
Each of the above embodiments and modifications should be considered in all respects merely as an example of the present invention and is not limiting. Those skilled in the art in the field to which the present invention is related will not deviate from the spirit and essential features of the present invention when considering the above-mentioned teaching contents, even if not explicitly stated in the present specification. Various variants and other embodiments that employ the principle of can be constructed.

<Other application examples>
In each of the above-described examples and the above-mentioned modified examples, an example in which the sole structure is applied to running shoes is shown, but the application of the present invention is not limited thereto, and the present invention includes walking shoes. It is also applicable to various sports shoes, other shoes and sandals.

As described above, the present invention is useful for a shoe sole structure for improving cushioning and stability with a simple structure and improving durability.

1: Shoes

2: Sole structure

20: Sole body 20A: Upper wall part 20B: Lower wall part 20b: Lower surface (ground plane)
20bp: Columnar protrusions 20C, 20D: Side wall part 20p: Rib (protruding part)

21: Out counter section

5: Three-dimensional elastic structure

t: Thickness

S: Interior space

H: Heel area F: Forefoot area Bf: Treading area

P: Feet

Japanese Unexamined Patent Publication No. 2004-242692 (see paragraphs [0025] to [0027])

Claims (16)

It is a sole structure for shoes
An upper wall portion arranged on the upper side and the upper wall portion having a heel region or a forefoot region corresponding to the heel portion or the forefoot portion of the wearer's foot, respectively, and at least in the heel region or the forefoot region. It has a lower wall portion arranged on the lower side with a space between the portions and left and right side wall portions arranged between the upper and lower wall portions and connected to the upper and lower wall portions.
The upper and lower wall portions and the side wall portions form a resin box-shaped member having a predetermined thickness and defining an internal space.
The side wall portion is configured to be elastically deformable in the vertical direction, and has a plurality of solid or hollow ridge portions extending substantially continuously in the vertical direction between the upper and lower wall portions.
The sole structure for shoes is characterized by this. In claim 1,
The side wall portion has a round shape that projects laterally between the upper and lower wall portions.
The sole structure for shoes is characterized by this. In claim 1 or 2,
The ridge portion is provided on the inner and outer instep sides of the side wall portion in the heel portion region or the tread portion region of the forefoot portion region.
The sole structure for shoes is characterized by this. In any of claims 1 to 3,
The ridge portion is arranged along the entire circumference of the side wall portion in the heel portion region or the forefoot portion region.
The sole structure for shoes is characterized by this. In any of claims 1 to 4,
The ridge portion extends to the lower surface of the lower wall portion, and the lower surface of the ridge portion forms a ground contact surface that contacts the road surface together with the lower surface of the lower wall portion.
The sole structure for shoes is characterized by this. In any of claims 1 to 5,
The lower wall portion has a tapered portion or a round portion that gradually rises upward toward the side wall portion in the inner and outer instep side portions of the heel portion region or the forefoot portion region.
The sole structure for shoes is characterized by this. In any of claims 1 to 6,
The side wall portion has an out-counter portion that extends upward beyond the upper surface of the upper wall portion in the heel portion region and is arranged along the periphery of the heel portion region.
The sole structure for shoes is characterized by this. In claim 7,
The out-counter portion has a plurality of solid or hollow ridge portions extending substantially continuously in the vertical direction.
The sole structure for shoes is characterized by this. In any of claims 1 to 8,
The sole structure has a vent that communicates with the internal space.
The sole structure for shoes is characterized by this. In claim 9.
Two or more of the ventilation holes are provided, and each of the ventilation holes penetrates one or more of the upper wall portion, the lower wall portion, and the side wall portion.
The sole structure for shoes is characterized by this. In claim 9.
The ventilation holes communicate with the internal space through the hollow ridges.
The sole structure for shoes is characterized by this. 11.
The upper end of the hollow ridge is open,
The sole structure for shoes is characterized by this. In claim 1,
A three-dimensional elastic structure made of resin fibers is arranged in the internal space.
The sole structure for shoes is characterized by this. In claim 13,
The three-dimensional elastic structure is molded by a 3D printer together with the upper and lower wall portions and the side wall portions.
The sole structure for shoes is characterized by this. In claim 14,
The 3D printer is a fused deposition modeling method.
The sole structure for shoes is characterized by this. The method for manufacturing a sole structure for shoes according to claim 1.
A wearer data acquisition process for acquiring at least heel or forefoot foot data of the wearer's foot and personal data including the wearer's weight, and
Based on the foot data and the personal data acquired in the wearer data acquisition step, the thickness of the upper and lower wall portions and the side wall portions, the shape of the box-shaped member, the size, structure and arrangement of the ridge portions. The pitch and the sole design process for designing the three-dimensional elastic structure,
A process of molding the box-shaped member and the three-dimensional elastic structure designed in the sole design process with a 3D printer, and
How to manufacture a sole structure for shoes with.

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