JP7386002B2 - Outsole for throwing shoes and throwing shoes equipped with the same - Google Patents

Description

Article 30, Paragraph 2 of the Patent Act applies (Publication date) May 21, 2019 (Publication location) ASICS Japan Co., Ltd. Tokyo Head Office (Publication date) May 28, 2019 (Publication location) ASICS Japan Co., Ltd. Kansai Office

The present invention relates to an outsole for a shoe for throwing such as a hammer thrower, shot putter, and discus thrower, and a throwing shoe equipped with the same. In particular, the present invention relates to an outsole for a throwing shoe that can easily transmit the stepping force to the ground to improve grip and perform smooth rotational motion, and a throwing shoe equipped with the outsole.

BACKGROUND ART Conventionally, outsoles of Patent Documents 1 and 2, for example, have been proposed as outsoles for shoes for throwing such as hammer throwing, shot put, and discus throwing.
The outsole described in Patent Document 1 has an annular protrusion or an annular groove formed in a predetermined region of the contact surface of the outsole for the pivot foot, and an arbitrarily shaped protrusion or annular groove in a predetermined region of the contact surface of the outsole for the other foot. A plurality of protrusions or recesses are formed (such as the scope of the utility model registration claims of Patent Document 1).
The outsole described in Patent Document 2 has a plurality of grooves formed in a predetermined region of the contact surface of the outsole (claims of Patent Document 2, etc.).

The outsoles described in Patent Documents 1 and 2 are both designed to improve the arrangement and shape of the protrusions and grooves formed on the contact surface, and to achieve both improved grip and smooth rotational movement. It wasn't enough.

Utility Model Publication No. 4-23405 Japanese Patent Application Publication No. 2002-45204

The present invention was made in order to solve the problems of the prior art mentioned above, and provides a throwing shoe that can easily transmit the stepping force to the ground, improve grip performance, and perform smooth rotational motion. An object of the present invention is to provide a sole and throwing shoes equipped with the same.

In order to solve the above problems, the present invention provides, as a first means, a first region, a first MP joint, a second MP joint, and a second MP joint of the foot, which are located inside the first region, and at least of the stepping portion. a second region located in a portion corresponding to the 3MP joint, and further comprising a plate-shaped high-rigidity portion having higher rigidity than the outsole body disposed on the second region. , the ground contact surface of the second region is a plane or a curved surface, and the ground contact surface of the first region is a curved surface having a larger curvature in the width direction than the ground contact surface of the second region. Provides outsoles for shoes.

According to the first means of the present invention, the outsole main body is located in the first region and inside the first region, and the treading portion (approximately corresponding to the first to fifth MP joints of the wearer's foot) Among the parts (located on the lower side of these MP joints when worn), at least the parts corresponding to the first MP joint, second MP joint, and third MP joint, which are likely to receive a relatively large amount of stepping force on the ground during the two-foot support phase. and a second region. In the first means according to the present invention, a plate-shaped high-rigidity portion having higher rigidity than the outsole main body (the member having the first region and the second region) is disposed on the second region. . The high-rigidity part has higher rigidity than the outsole itself, so if the amount of deformation is the same, the repulsive force that tries to return to its original state will be greater, making it easier to transmit the stepping force to the ground and improving grip. It is possible. On the other hand, the first region located on the outside, which is often used during rotational operation, has lower rigidity than the high-rigidity portion and is therefore easily deformed, allowing smooth rotational operation. In addition, in the first means according to the present invention , the rigidity of the first region and the rigidity of the second region may be the same .
As described above, according to the first means of the present invention, there is provided an outsole for a throwing shoe that can easily transmit the stepping force to the ground, improve grip performance, and perform smooth rotational motion. Ru.
Further, according to the first means of the present invention, the curvature in the width direction of the ground contact surface of the first region located on the outside is larger than that of the ground contact surface of the second region located on the inside, so that the contact surface of the first region located on the outside has a larger curvature in the width direction. It becomes easier to bring the ground contact surfaces of the two regions into contact with the ground smoothly, and it is possible to perform the rotation operation even more smoothly .

In the present invention, the second region is "located more medial than the first region" in the "front-to-back direction", which is the direction of the straight line connecting the front side (distal phalanx side) and the back side (calcaneus side) of the foot. ”, the front end of the second region is located on the rear side than the front end of the first region, and the rear end of the second region is located on the front side than the rear end of the first region, and the front end of the second region is located on the front side than the rear end of the first region. Regarding the orthogonal "width direction", the end of the second area on the medial foot side (big toe (first toe) side) is closer to the outside foot side (little toe (fifth toe)) than the end of the first area on the medial foot side. This means that the end of the second region on the outside foot side is located closer to the inside foot than the end of the first region on the outside foot side.
In addition, in the present invention, "a second region located in a portion corresponding to the first MP joint, second MP joint, and third MP joint of the foot" refers to the entire first MP joint, the entire second MP joint, and the entire third MP joint. The concept is not limited to a region located below the entire body, but includes a region located below at least a portion of the first MP joint, at least a portion of the second MP joint, and at least a portion of the third MP joint.

Preferably, the high-rigidity portion is provided continuously from at least the toe region to the midfoot region.

According to the above-mentioned preferred configuration, the high-rigidity portion is provided continuously from at least the toes to the midfoot (without being divided in the front-rear direction), which further reduces the force of stepping on the ground during the period when both feet are supported. It is possible to make the transmission even easier and to further improve the grip property.

In the above preferred configuration, the term "toe section" means a portion that generally corresponds to the phalanges located in front of the MP joint (located below the phalanges when worn). Furthermore, the term "midfoot" refers to a portion that generally corresponds to the cuneiform bone, navicular bone, and cuboid bone (located below these bones when worn). When the total length of the outsole is taken as 100%, approximately 5 to 30% of the area from the front end of the outsole corresponds to the toe area, and approximately 30 to 85% of the area corresponds to the midfoot area. Furthermore, "the high-rigidity part is provided continuously from at least the toe area to the midfoot area" means that the high-rigidity part is provided continuously from the entire toe area to the entire midfoot area. The concept is not limited to this case, and includes cases in which a high-rigidity part is continuously provided from at least a part of the toe part to at least a part of the midfoot part.

Moreover, in order to solve the above-mentioned problem, the present invention provides, as a second means, a first region, a first MP joint, a second MP joint of the foot of at least the stepping portion, and which is located inside the first region. and a second region located at a portion corresponding to the third MP joint, further comprising a plate-shaped high rigidity portion having higher rigidity than the outsole body disposed on the second region. Alternatively, the second region is formed from a high-rigidity portion having higher rigidity than the first region, and the ground contact surface of the second region is a flat or curved surface, and the ground contact surface of the first region is is a curved surface having a larger curvature in the width direction than the ground contact surface of the second region, and the high-rigidity portion is curved in the width direction by two cut portions extending in the front-rear direction from the toe portion toward the stepping portion. The outsole of a throwing shoe is also provided as an outsole for a throwing shoe, characterized in that it has three divided parts, and the three divided parts are wider as they are located closer to the medial foot. Ru .

According to the second means of the present invention , since the high-rigidity portion has three divided portions divided in the width direction by two cut portions, the cut portion is not provided but is continuously provided in the width direction. Since the outsole is more easily bent in the width direction than in the case where the outsole is a high-rigidity part, there is an advantage that rotational movement is not hindered. In addition, the toe area and the stepping area tend to receive relatively more stepping force on the ground during the two-foot support phase as the part is located closer to the medial foot, so the width of the three divided parts is located closer to the medial foot. By making it as wide as possible, it is possible to easily transmit the stepping force and improve grip performance without interfering with rotational movement.

In addition, in the second means according to the present invention , the "inner foot side" means the big toe (first toe) side of both sides of the outsole in the width direction, as described above. In addition, "the width of the three divided parts is wider as it is located closer to the medial foot" means that the average value or maximum value of the dimension (width) in the width direction of each divided part is This means that the larger the division is located.
Further, in one aspect of the second means according to the present invention, similarly to the first means, a plate-shaped high-rigidity portion having higher rigidity than the outsole main body is disposed on the second region. In this aspect, the second region of the outsole main body is formed from a high-rigidity portion having higher rigidity than the first region, instead of having a plate-like high-rigidity portion. In this aspect as well, similar to the first aspect above, the second region formed from the high-rigidity portion allows the stepping force to be easily transmitted to the ground, and it is possible to improve the grip performance, which is better than the high-rigidity portion. The first region having low rigidity allows smooth rotational movement.

Moreover, in order to solve the above-mentioned problem, the present invention provides, as a third means, a first region, a first MP joint, a second MP joint of the foot of at least the stepping portion, and which is located inside the first region. and a second region located at a portion corresponding to the third MP joint, further comprising a plate-shaped high rigidity portion having higher rigidity than the outsole body disposed on the second region. Alternatively, the second region is formed from a high-rigidity portion having higher rigidity than the first region, and the ground contact surface of the second region is a flat or curved surface, and the ground contact surface of the first region is is a curved surface having a larger curvature in the width direction than the ground contact surface of the second region, and the high-rigidity portion is curved in the front-rear direction from the toe to the stepping portion, and the other portion is flat. It is also provided as an outsole for throwing shoes, which is characterized by having a shape.

Generally, the outsole main body is curved in the front-back direction from the toe part to the stepping part, and the other part is flat.
Therefore, according to the third means of the present invention , in one embodiment including the plate-like high rigidity portion disposed on the second region of the outsole body, the high rigidity portion can be easily moved along the outsole body. It is possible to place

Preferably , the second region is more rigid than the first region.

According to the above-described preferred configuration , since the second region has a higher rigidity than the first region, the force of stepping on the ground is transmitted more easily, and the grip performance can be further improved.

In addition, in the above-mentioned preferred configuration, "the second region has higher rigidity than the first region" refers to one comprising a plate-shaped high-rigidity portion disposed on the second region of the outsole main body. In the case of this aspect, it means that the second region of the outsole body is more rigid than the first region. That is, it means that the rigidity is higher in the following order: rigidity of the plate-shaped high-rigidity part>rigidity of the second region of the outsole body>rigidity of the first region of the outsole body. In addition, in the case of another aspect in which the second region of the outsole body is formed from a high-rigidity portion that is more rigid than the first region, the second region (high-rigidity portion) of the outsole body is more rigid than the first region. also means high rigidity.

Preferably, at least in the ground contact surface of the first region of the forefoot, a portion located on the inner foot side has a larger curvature in the width direction than a portion located on the outer foot side.

According to the above-mentioned preferred configuration, the part of the ground contact surface of the first region located on the medial foot side has a larger curvature in the width direction than the part located on the outside foot side, so that the foot is particularly large on the medial foot side. It is possible to perform a rotational motion suitable for a tilted hammer throw.

In addition, in the above-mentioned preferable configuration, the "forefoot part" means a part that generally corresponds to the phalanges, MP joints, and metatarsals (located below these bones when worn). When the total length of the outsole is taken as 100%, an area approximately 0 to 30% from the front end of the outsole corresponds to the forefoot. Further, as described above, the term "outer foot side" means the little toe (fifth toe) side of both sides of the outsole in the width direction.

Preferably, at least on the medial foot side, a portion corresponding to the front of the first proximal phalanx or the first distal phalanx of the foot is the first region, and the second region has a widthwise center portion that protrudes most forwardly. There is.

According to the above-mentioned preferred configuration, it is possible to transmit the stepping force to the ground even more easily during both the support period of both feet and the time of release, and it is possible to further improve the grip performance.

Preferably, the second region includes a groove formed in the outsole main body, and the plate-shaped high-rigidity portion is fitted into the groove and is connected to the upper surface of the first region. The upper surface of the high-rigidity portion is substantially flush with the upper surface.

According to the above preferred configuration, the upper surface of the first region and the upper surface of the plate-shaped high-rigidity portion disposed on the second region (concave groove) are substantially flush with each other, so that the foot feels good when worn. This is an advantage.

Preferably, the ground contact surface of the second region from at least the forefoot to the midfoot is a smooth surface.

According to the above preferable configuration, it is possible to further improve grip performance.

In addition, in the above preferred configuration, "the ground plane is a smooth surface" means that designs such as protrusions or grooves as described in Patent Documents 1 and 2 are not formed on the ground plane, and for example, It is preferable to use mirror finishing, but sandblasting may also be used.

Moreover, in order to solve the above-mentioned problem, the present invention is also provided as a throwing shoe characterized by comprising the outsole described in any one of the above and an upper.

Preferably, the bottom surface of the upper and the top surface of the outsole are in contact with each other.

According to the above preferred configuration, the bottom surface of the upper and the top surface of the outsole are in contact, in other words, there is no midsole between the bottom surface of the upper and the top surface of the outsole, so that when worn, the foot It is possible to shorten the distance between the back surface of the foot and the ground, making it easier to transmit the force of stepping on the ground and further improving the grip.
However, the throwing shoe according to the present invention is not limited to the above-mentioned preferred configuration, and may be provided with a midsole. In this case, by making the thickness of the midsole smaller than the thickness of the outsole, it is possible to more easily transmit the stepping force to the ground and improve the grip.

Advantageous Effects of Invention According to the present invention, it is possible to easily transmit the force of stepping on the ground to improve grip performance, and to perform a smooth rotation operation.

1 is a top perspective view showing a schematic configuration of a throwing shoe according to an embodiment of the present invention. 1 is a top perspective exploded view showing a schematic configuration of a throwing shoe according to an embodiment of the present invention. FIG. 1 is a bottom perspective view showing a schematic configuration of a throwing shoe according to an embodiment of the present invention. FIG. 2 is a plan view showing the positional relationship between the outsole and the bones of the foot according to an embodiment of the present invention. 1 is a diagram showing a schematic configuration of an outsole according to an embodiment of the present invention. 1 is a sectional view showing a schematic configuration of an outsole according to an embodiment of the present invention. FIG. 7 is a plan view showing the positional relationship between the forefoot portion of the outsole and the bones of the foot according to a modification of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an outsole for a throwing shoe according to an embodiment of the present invention and a throwing shoe including the same will be described with reference to the accompanying drawings as appropriate.

FIG. 1 is a top perspective view showing a schematic configuration of a throwing shoe according to an embodiment of the present invention. FIG. 2 is a top perspective exploded view showing a schematic configuration of the throwing shoe according to the present embodiment. FIG. 3 is a bottom perspective view showing a schematic configuration of the throwing shoe according to the present embodiment. FIG. 4 is a plan view showing the positional relationship between the outsole and the bones of the foot according to the present embodiment. In Figures 1 to 4, throwing shoes and outsole for the left foot are shown, but the right foot has a line-symmetrical shape with the left foot, so illustration is omitted, and only the left foot will be explained below. .
As shown in FIGS. 1 to 3, the throwing shoe 100 according to the present embodiment includes an outsole 10 shown by a solid line and an upper 40 shown by a broken line. In the throwing shoes 100 according to the present embodiment, as shown in FIG. are in contact and there is no midsole.

The outsole 10 according to the present embodiment includes an outsole main body 20 and a plate-shaped high rigidity portion 30 disposed on the outsole main body 20.
The outsole main body 20 has a first region 21 and a second region 22 located inside the first region 21 (the dotted hatched region in FIGS. 1 to 3).
As shown in FIG. 2, the second region 22 of this embodiment includes a groove 22a formed in the outsole main body 20, and as shown in FIG. It is fitted into the groove 22a, so that the upper surface of the first region 21 and the upper surface of the high-rigidity section 30 are substantially flush with each other. In this embodiment, the high-rigidity portion 30 is simply fitted into the groove 22a of the outsole main body 20, and is not fixed to the outsole main body 20 with an adhesive or the like.
However, the present invention is not limited to this, and the high rigidity portion 30 may be fixed to the groove 22a with an adhesive or the like. Alternatively, the high-rigidity portion 30 may simply be placed on the second region 22 without providing the groove 22a in the second region 22. In this case, the top surface of the first region 21 and the top surface of the high-rigidity section 30 are not flush with each other (the top surface of the high-rigidity section 30 protrudes above the top surface of the first region 21 by the thickness of the high-rigidity section 30). do). If it is desired to eliminate the discomfort that the shoe feels on the foot when worn, for example, a midsole with a small thickness may be placed on the upper surface of the outsole 10.

As shown in FIG. 4, the second area 22 where the high-rigidity part 30 is arranged is at least the hatched part of the stepping part (the part roughly corresponding to the first to fifth MP joints of the wearer's foot). It is located at a portion corresponding to the first MP joint, the second MP joint, and the third MP joint.
Specifically, in a preferred embodiment, the second region 22 of this embodiment extends from at least the toe region (a portion roughly corresponding to the phalanges located anterior to the MP joint) to the midfoot region (cuneiform bone, navicular bone). and a portion roughly corresponding to the cuboid bone). Accordingly, the high-rigidity portion 30 that fits into the groove 22a of the second region 22 is continuously provided at least from the toe region to the position corresponding to the midfoot region.
More specifically, as shown in FIG. 4, the second region 22 of this embodiment preferably extends from the toes to the position corresponding to the hindfoot (a portion roughly corresponding to the talus and calcaneus). are arranged continuously. Accordingly, the high-rigidity section 30 that fits into the second region 22 is continuously provided from the toe section to the position corresponding to the rear foot section.

The outsole main body 20 is made of rubber or resin, for example. On the other hand, the high-rigidity portion 30 is made of, for example, nylon, polypropylene, or polyurethane, and has higher rigidity than the outsole main body 20. The hardness of the first region 21 of the outsole main body 20 is preferably HA60 or higher, more preferably 65 or higher. The hardness of the second region 22 is preferably HA60 or higher, more preferably 70 or higher. The hardness of the high-rigidity portion 30 is preferably HD60 or higher, more preferably 65 or higher.

Further, in a preferred embodiment of the outsole main body 20 of the present embodiment, the second region 22 has higher rigidity than the first region 21. That is, in FIGS. 1, 2, and 3, the rigidity of the second region 22 of the outsole main body 20 that is hatched in a dotted manner is higher than the rigidity of the first region 21 that is not hatched. Therefore, the rigidity increases in the following order: rigidity of high-rigidity portion 30>rigidity of second region 22 of outsole body 20>rigidity of first region 21 of outsole body 20.

The material forming the first region 21 is preferably a viscoelastic body containing a rubber component, for example. The viscoelastic body preferably has a loss coefficient [tan δ] of 0.17 or more in dynamic viscoelasticity measurement under the conditions of 23° C., frequency of 10 Hz, static strain of 10%, and dynamic strain of 7%. Moreover, it is preferable that the storage elastic modulus [E'] in dynamic viscoelasticity measurement under the same conditions is 5.7 MPa or less. Further, it is preferable that the ratio [M300/M100] of the tensile stress at 300% elongation to the tensile stress at 100% elongation is 4.4 or more. Preferably, the rubber component includes styrene-butadiene random copolymer rubber.
By forming the first region 21 with the above-mentioned material, grip performance is high, and energy loss does not occur even during point contact during rotation or during the final stage of kicking off. It also has the effect of being resistant to rain.

The material forming the second region 22 is preferably a rubber composition containing, for example, butadiene rubber and silica. This rubber composition further contains oil, and the oil preferably has a mass average molecular weight of 1,060 or more and less than 1,800. Butadiene rubber contains more than 85 parts by mass when the total amount of rubber contained is 100 parts by mass, and more than 80% of the molecular structure of butadiene rubber is cis-1,4 unit. It is preferable to use high-cis type butadiene rubber.
By forming the second region 22 with the above material, it has excellent wear resistance and can prevent energy loss due to wear during rotation.

In addition, in order to form the first region 21 and the second region 22 in the outsole main body 20, that is, to change the rigidity of the outsole main body 20 depending on the region, for example, two-color molding can be performed using resins having different hardnesses. good. In addition, this can also be achieved by performing press working multiple times under different pressure conditions. Specifically, it is conceivable to process only the second region 22 in the first press process, and process only the first area 21 in the second press process. It is also conceivable to process the entire area in the first press process and process only the second area 22 in the second press process.

As shown in FIGS. 2 and 4, the high-rigidity portion 30 of this embodiment has a fork-like shape. Specifically, the high-rigidity part 30 is divided into a plurality (in this embodiment, two) in the width direction by a plurality of (two in this embodiment) notches 31 extending in the front-rear direction from the toe part toward the stepping part. 3) divided portions 32a, 32b, and 32c. The cut portion 31 is formed diagonally (formed toward the medial foot side as it goes forward) along each of the phalanges. The plurality of divided parts 32a, 32b, and 32c have wider widths (average value or maximum value of the width of each divided part) as they are located closer to the medial foot side (big toe side). That is, as shown in FIG. 2, the width increases in the following order: Width Wa of divided portion 32a>Width Wb of divided portion 32b>Width Wc of divided portion 32c.
The groove 22a of the second region 22 into which the high-rigidity section 30 fits also has a fork-like shape with a notch corresponding to the shape of the high-rigidity section 30 described above. The second region 22 has a shape that generally follows the outer edge of the groove 22a, except for the cut portion of the groove 22a.

Since the high-rigidity portion 30 has a plurality of divided portions 32a, 32b, and 32c that are divided in the width direction by the plurality of notches 31, the outsole 10 can be easily bent in the width direction. In addition, since the toes and treading portions are more likely to receive a relatively large amount of treading force on the ground during the two-foot supporting period as they are located closer to the inside of the foot, the widths of the plurality of divided portions 32a, 32b, and 32c are set as described above. By doing so, it is possible to easily transmit the stepping force and improve grip performance without interfering with rotational movement.
The width of the cut portion 31 is smaller than the width of the divided portions 32a, 32b, and 32c. Furthermore, the cut portion 31 extends to a stepping portion that generally corresponds to the MP joint. Thereby, flexibility can be imparted to the high-rigidity portion 30 while maintaining its strength.

Although it is preferable that the high-rigidity portion 30 has divided portions 32a, 32b, and 32c divided by the cut-out portion 31, the present invention is not limited to this. You don't have to. Further, the number of notches 31 (the number of division parts determined accordingly) can be changed as appropriate. Furthermore, the thickness of the portion corresponding to the notch portion 31 may be formed smaller than the thickness of other portions.

As shown in FIG. 4, in the outsole main body 20 of this embodiment, the hatched portion corresponding to the front of the first proximal phalanx of the foot is a first region 21, at least on the medial foot side. In other words, the outsole main body 20 of this embodiment does not have the second region 22 (therefore, does not have the groove 22a) in a portion corresponding to the front of the first proximal phalanx, at least on the medial foot side. Moreover, the widthwise central portion of the second region 22 and the groove 22a protrudes most forward. Specifically, the center portion in the width direction where the divided portion 32b fits into the groove 22a protrudes furthest forward. The high-rigidity portion 30 that fits into the groove 22a of the second region 22 having the above-described shape also has a shape corresponding to the shape of the groove 22a of the second region 22 described above.

As shown in FIG. 3, the contact surface of the second region 22 from at least the forefoot to the midfoot (in this embodiment, the entire contact surface of the outsole main body 20) is a smooth surface, which is described in Patent Documents 1 and 2. Designs such as protrusions and grooves are not formed on the ground surface.
Note that the ground plane of the second region 22 only needs to be a smooth surface, and for example, a groove may be formed between the first region 21 and the second region 22.

FIG. 5 is a diagram showing a schematic configuration of the outsole 10 according to the present embodiment. Figure 5(a) is a top view, Figure 5(b) is a side view seen from the medial foot side, Figure 5(c) is a bottom view, and Figure 5(d) is a side view viewed from the outside foot side. shows. Note that in FIG. 5(c), the second region 22 is hatched in a dotted manner, but this is omitted in FIG. 5(a). Moreover, the AA line shown in FIGS. 5(a) and 5(c) means the center line of the outsole 10 (the straight line connecting the most forward point and the most rearward point). Further, the BB line, CC line, DD line, and EE line shown in FIGS. 5(a) to 5(d) respectively indicate the same position in the front-rear direction of the outsole 10. Furthermore, the straight line H shown in FIGS. 5(b) and 5(d) means the ground. In FIG. 5, the outsole 10 for the left foot is shown, but since the outsole 10 for the right foot has a line-symmetrical shape with the outsole for the left foot, illustration thereof is omitted, and only the outsole for the left foot will be described below.
FIG. 6 is a sectional view showing a schematic configuration of the outsole 10 according to the present embodiment. Figure 6(a) is a cross-sectional view taken along line AA shown in Figure 5(a), viewed from the medial foot side, and Figure 6(b) is a cross-sectional view taken along line BB shown in Figure 5(a), viewed from the medial foot side. 6(c) is a cross-sectional view taken along line CC shown in FIG. 5(a) seen from the rear side, and FIG. 6(d) is a view taken along line DD shown in FIG. 5(a). FIG. 6(e) shows a cross section taken along the line EE shown in FIG. 5(a) as seen from the rear side. In addition, in FIG. 6, the high rigidity portion 30 is hatched.

As can be seen from FIG. 6, the thickness of the high-rigidity portion 30 is more than half the thickness of the portion of the outsole main body 20 where the groove is not provided (the portion where the high-rigidity portion 30 is not arranged). Further, the thickness of the high-rigidity portion 30 is the same as or slightly larger than the thickness of the portion of the outsole main body 20 where the groove is provided. When the high-rigidity portion 30 has the above thickness, it is possible to transmit the stepping force to the ground more reliably.

As can be seen from FIG. 6(a), the high-rigidity portion 30 of this embodiment is curved in the front-rear direction (curved convexly downward) from the front end to the vicinity of the CC line, and the other part (near the CC line) The rear part) is flat. Referring also to FIGS. 4 and 5(a), this indicates that the high-rigidity portion 30 is curved in the front-rear direction from the toe to the stepping portion, and the other portion is flat. ing.

As can be seen from FIGS. 6(b) to 6(e), the contact surface 2m of the second region 22 of the outsole main body 20 where the high-rigidity portion 30 is arranged is a flat or curved surface (in the example shown in FIG. is a plane). On the other hand, the ground planes 2 i and 2 o of the first region 21 are curved surfaces having a larger curvature in the width direction than the ground plane 2 m of the second region 22 . The radius of curvature of the ground planes 2i and 2o is preferably 5 mm to 25 mm. When the ground contact surface 2m is a curved surface, the radius of curvature is preferably 150 mm or more.

Moreover, as can be seen from FIGS. 6(b) and 6(c), among the contact surfaces 2i and 2o of the first region 21, the contact surface 2i located on the inner foot side is higher than the contact surface 2o located on the outer foot side. The curvature in the width direction is larger than that of the If you also refer to FIGS. 4 and 5(a), this means that among the contact surfaces 2i and 2o of the first region 21 in at least the forefoot, the contact surface 2i located on the inner foot side is located on the outer foot side. This shows that the curvature in the width direction is larger than that of the ground contact surface 2o.

According to the outsole 10 and the throwing shoes 100 including the same according to the present embodiment having the configuration described above, the outsole main body 20 is located inside the first region 21 and the first region 21. , a second region 22 located at least in a portion of the stepping portion corresponding to the first MP joint, second MP joint, and third MP joint to which a relatively large amount of stepping force is likely to be applied to the ground during the two-foot supporting period. A plate-shaped high-rigidity portion 30 having higher rigidity than the outsole main body 20 is arranged on the second region 22 . The high-rigidity portion 30 has higher rigidity than the outsole main body 20, so if the amount of deformation is the same, the repulsive force that tries to return to the original state will be greater, and as a result, the force of stepping on the ground will be more easily transmitted, improving grip. Is possible. On the other hand, the first region 21 located on the outside, which is often used during rotational operation, has lower rigidity than the high-rigidity portion 30 and is therefore easily deformed, allowing smooth rotational operation.

Note that in this embodiment, the outsole 10 includes an outsole main body 20 and a high-rigidity portion 30 disposed on the second region 22 of the outsole main body 20 (fitted into the groove 22a). However, the present invention is not limited to this, and instead of having the plate-shaped high rigidity part 30, the second region 22 of the outsole main body 20 has a high rigidity part having higher rigidity than the first region 21. It is also possible to have an outsole formed from. That is, instead of the plate-shaped high-rigidity portion 30, the entire second region 22 may be formed of a high-rigidity resin.

Further, in this embodiment, the outsole main body 20 has been described in which the first region 21 is a portion corresponding to the front of the first proximal phalanx of the foot at least on the medial foot side, but the present invention is not limited to this. Instead, as shown in FIG. 7, it is also possible to form an outsole main body in which a portion corresponding to the front of the first distal phalanx of the foot is the first region 21 at least on the medial foot side. In addition, the boundary between the first area 21 and the second area 22 can be changed as appropriate.

Further, in this embodiment, the bottom surface 41 of the upper 40 of the throwing shoe 100 is in contact with the top surface of the outsole 10, and a configuration in which no midsole is present has been described, but the present invention is not limited to this. It is also possible to use the shoe as a throwing shoe with a midsole. In this case, by making the thickness of the midsole smaller than the thickness of the outsole 10, it is possible to more easily transmit the stepping force to the ground and improve the grip.

10...Outsole 20...Outsole body 30...High rigidity part 40...Upper 21...First region 22...Second region 22a...Concave groove 100...Throwing shoes for

Claims (10)

a first region; and a second region located inside the first region and located at least in a portion of the stepping portion corresponding to a first MP joint, a second MP joint, and a third MP joint of the foot. Equipped with an outsole body,
further comprising a plate-shaped high-rigidity portion having higher rigidity than the outsole main body disposed on the second region,
The ground plane of the second region is a plane or a curved surface,
The ground plane of the first region is a curved surface having a larger curvature in the width direction than the ground plane of the second region.
The outsole of the throwing shoe is characterized by: The high rigidity portion is provided continuously from at least the toe region to the midfoot region,
The outsole for a throwing shoe according to claim 1. a first region; and a second region located inside the first region and located at least in a portion of the stepping portion corresponding to a first MP joint, a second MP joint, and a third MP joint of the foot. Equipped with an outsole body,
The method further includes a plate-shaped high-rigidity portion having higher rigidity than the outsole body disposed on the second region, or the second region is formed from a high-rigidity portion having higher rigidity than the first region. has been
The ground plane of the second region is a plane or a curved surface,
The ground contact surface of the first region is a curved surface having a larger curvature in the width direction than the ground contact surface of the second region,
The high-rigidity portion has three divided portions divided in the width direction by two cut portions extending in the front-rear direction from the toe portion toward the stepping portion,
The three divided parts are wider as they are located closer to the medial foot,
The outsole of the throwing shoe is characterized by: a first region; and a second region located inside the first region and located at least in a portion of the stepping portion corresponding to a first MP joint, a second MP joint, and a third MP joint of the foot. Equipped with an outsole body,
The method further includes a plate-shaped high-rigidity portion having higher rigidity than the outsole body disposed on the second region, or the second region is formed from a high-rigidity portion having higher rigidity than the first region. has been
The ground plane of the second region is a plane or a curved surface,
The ground contact surface of the first region is a curved surface having a larger curvature in the width direction than the ground contact surface of the second region,
The high-rigidity portion is curved in the front-rear direction from the toe portion to the stepping portion, and the other portion is flat.
The outsole of the throwing shoe is characterized by: At least in the ground contact surface of the first region in the forefoot portion, the portion located on the medial foot side has a larger curvature in the width direction than the portion located on the outside foot side.
The outsole for a throwing shoe according to any one of claims 1 to 4. A portion corresponding to the front of the first proximal phalanx or the first distal phalanx of the foot at least on the medial foot side is the first region,
The second region has a central portion in the width direction protruding most forwardly,
The outsole for a throwing shoe according to any one of claims 1 to 5. The second region includes a groove formed in the outsole main body,
The plate-shaped high rigidity portion is fitted into the groove,
The upper surface of the first region and the upper surface of the plate-shaped high-rigidity portion are substantially flush with each other;
The outsole for a throwing shoe according to any one of claims 1 to 6. The contact surface of the second region from at least the forefoot to the midfoot is a smooth surface;
The outsole for a throwing shoe according to any one of claims 1 to 7. The outsole according to any one of claims 1 to 8,
comprising an upper;
Throwing shoes characterized by: the bottom surface of the upper and the top surface of the outsole are in contact with each other,
The throwing shoe according to claim 9, characterized in that:

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