JP2005218543A - Sole structure for shoe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sole structure for shoe which can shorten the time from getting the shoe landed on to separated from the ground. <P>SOLUTION: The sole structure body 1 has midsole 2 made up of a soft elastic member provided at a heel part H of the shoe. At the heel site of the midsole 2, a plurality of grooves 20 which is extended in the its width direction while being opened on the ground contact side of the heel site is formed. The grooves 20 are extended being gradually inclined to the side of the rear end 2e of the heel site toward the contact surface side of the sole inside the heel site. When a pressing load works downward as the shoe is landed on the ground with the heel, the midsole part 25 sandwiched by the adjacent groove 20 is shear deformed so as to be levelled backward, so that the heel site of the midsole 2, hence, the foot of the wearing person moves backward by Δ in the way opposite to the traveling direction eventually causing a decrease in the angle α<SB>0</SB>of the foot joint in the shoes being landed on the ground. This allows a quick shift to a position shown in Fig. 4B from that shown in Fig. 4A, thereby enabling the shortening of the time from getting the shoe landed on to separated from the ground. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a sole structure of a shoe suitable for sports such as running, jogging and walking, and more particularly to a structure capable of shortening a time from landing to take-off.

  In sports shoes such as running shoes whose main purpose is running, it is preferable that the time required for one cycle from landing on the road surface to kicking off the road surface and taking off is as short as possible.

  However, there have been no shoes developed from such a viewpoint so far, and the present invention has been made from a novel viewpoint.

  By the way, there exists a thing shown in Unexamined-Japanese-Patent No. 2000-197503 as a sole structure for shoes similar to this invention on the external appearance. This sole structure has a shear deformation element in the heel portion that is inclined obliquely forward as it goes upward.

In this case, when a load from above is applied to the sole structure, the shear deformation element is subjected to shear deformation so as to fall forward, so that impact during traveling is reduced. As will be described later, the shear deformation element is inclined in the direction opposite to the midsole portion and the outsole plate in the present invention, and is devised from a different viewpoint from the present invention.
JP 2000-197503 A

  The problem to be solved by the present invention is to make it possible to shorten the time from landing to takeoff in the sole structure of a shoe.

  In the present invention, a plurality of grooves are formed in the midsole heel part, and these grooves are gradually inclined toward the heel rear end side toward the sole contact surface inside the midsole heel part. Main features.

  Here, a change in ankle joint angle in one running cycle (gait cycle) from the landing of the foot to the takeoff will be described with reference to FIGS. 3A to 3C. In these figures, FIG. 3A shows a landing state, FIG. 3C shows a take-off state, and FIG. 3B shows an intermediate state.

In each figure, an angle α at which a line L connecting the uppermost point P of the rib upper end and the outermost point Q of the leg intersects the sole surface S is an ankle joint angle. As can be seen from these figures, the following relationship exists between the ankle joint angle α ₀ at the time of landing, the ankle joint angle α ₂ at the time of takeoff, and the ankle joint angle α _{1 in} the intermediate state. is there. That is, α ₀ > α ₁
α ₁ <α ₂
From this, it can be seen that the ankle joint angle is decreasing in the intermediate stage from landing to the departure.
The present invention has been made paying attention to such a change in ankle joint angle during one cycle.

  The sole structure of the shoe according to the invention of claim 1 includes a midsole made of a soft elastic member provided at least on the heel portion of the shoe, and substantially extends in the width direction at the heel portion of the midsole. A plurality of grooves are formed at the ground contact surface side of the heel part, and each groove gradually inclines toward the rear end side of the heel part as it goes toward the sole contact surface side of the heel part inside the heel part However, it is extended (refer FIG. 2A).

  According to the sole structure of the first aspect of the present invention, when a downward pressing load is applied when landing from the heel, the midsole portion sandwiched between adjacent grooves is sheared and deformed so as to fall backward (FIG. 2B). reference). Due to such shear deformation, at the time of landing, the heel portion of the midsole, and thus the wearer's foot, moves backward by Δ in the direction opposite to the traveling direction.

This will be considered in the landing state shown in FIG. 3A. When the foot moves backward by Δ at the time of landing, in FIG. 3A, the position of the uppermost protrusion point P of the radius of the leg does not change and the position of the outermost protrusion point Q moves in the traveling direction (right direction in the figure). It moves to the back (the left direction in the figure) on the opposite side. Then, the ankle joint angle α _0, which is the angle at which the line L connecting the radius upper end most protrusion point P and the outermost fruit protrusion point Q intersects the sole surface S, decreases. In other words, the foot wearer angle α ₀ decreases due to the shear deformation of the midsole heel part at the time of landing without the shoe wearer being aware of the transition from the state of FIG. 3A to the state of FIG. 3B. . This makes it possible to quickly shift from the state of FIG. 3A to the state of FIG. 3B. As a result, the time from landing to takeoff can be shortened.

  The sole structure of the shoe according to the invention of claim 11 is provided with a midsole made of a soft elastic member provided at least on a heel part of the shoe, and a grounding surface side of a heel part of the midsole, and is harder than the midsole. And a plurality of outsole plates arranged at intervals in the front-rear direction. The front end surface and the rear end surface of each outsole plate are on the grounding surface side of the heel part of the midsole. As it goes to, it extends while inclining toward the rear end side of the midsole (see FIG. 5A).

  In the invention of claim 11, when a downward pressing load is applied when landing from the heel, the outsole plate is sheared and deformed so as to fall backward (see FIG. 5B). However, the wearer's foot moves backward by Δ ″ in the direction opposite to the traveling direction.

Accordingly, in this case as well, as in the case of the invention of claim 1, the ankle joint angle α ₀ is reduced at the time of landing, and thus the state of FIG. 3A can be quickly shifted to the state of FIG. 3B. Becomes possible, and the time from landing to takeoff can be shortened.

  The sole structure of the shoe according to the invention of claim 2 is the sole structure according to claim 1, wherein the midsole is also provided on the outer part of the midfoot part of the shoe, A plurality of grooves that extend in the direction and open to the ground contact surface side of the outer part of the middle foot part are formed, and each groove gradually increases in the middle foot part toward the sole contact surface side of the middle foot part. It extends while inclining to the rear end side of the midfoot part.

  According to the second aspect of the present invention, when a downward pressing load is applied to the outer part of the middle foot during landing, the midsole part sandwiched between the adjacent grooves is sheared and deformed so as to fall backward. Due to such shear deformation, when landing on the outer part of the midfoot part of the shoe, the outer part of the midsole part of the midsole, and thus the wearer's foot, moves a predetermined amount backward in the direction opposite to the traveling direction.

As a result, the ankle joint angle α ₀ will decrease even when landing on the outer part of the middle foot part, and as a result, it becomes possible to quickly shift from the state of FIG. 3A to the state of FIG. The time from landing to takeoff can be further shortened.

  In the invention of claim 3 or 12, the midsole portion or each outsole plate between adjacent grooves has a parallelogram shape or a trapezoidal cross-sectional shape in the front-rear direction.

  The invention of claim 4 or 13 describes the contents of the present invention from the viewpoint of operation and effect, and the midsole portion or each outsole plate is configured to be deformed so as to fall backward when the shoe lands. It is a clarified point.

  The sole structure according to a fifth aspect of the present invention is the sole structure according to the first aspect, wherein the midsole is also provided on the front foot portion of the shoe, and the inclination direction is opposite to the groove in the first aspect of the invention. Directional grooves are formed. That is, in this case, each groove extending substantially in the width direction and opening to the ground contact surface side of the forefoot part of the midsole gradually increases toward the sole contact surface side of the forefoot part inside the forefoot part. It extends while inclining to the front end side of the forefoot region (see FIG. 4A).

  According to the sole structure of the fifth aspect of the present invention, when a downward pressing load acts on the front foot portion of the midsole when the weight moves to the front foot portion of the foot after landing from the heel, each adjacent groove The midsole portion sandwiched between the layers is subjected to shear deformation so as to fall forward (see FIG. 4B). Due to such shear deformation, when the weight moves to the forefoot, the forefoot portion of the midsole, and thus the wearer's foot, moves in the traveling direction by Δ ′.

This will be considered in the state at the time of weight transfer to the forefoot shown in FIG. 3B. If the foot moves forward by Δ ′ during the weight shift to the forefoot part, the position of the uppermost protrusion P of the radius of the leg does not change in FIG. It moves in the (right direction in the figure). Then, so that the ankle angle alpha ₁ of the line L connecting the fibula upper top突点P and lateral malleolus top突点Q is an angle intersecting the sole plane S is increased. In other words, the foot joint angle α ₁ is determined by the shear deformation forward of the midsole forefoot part during weight transfer to the forefoot without the shoe wearer being aware of the transition from the state of FIG. 3B to the state of FIG. 3C. Will increase. Thereby, it is possible to quickly shift from the state of FIG. 3B to the state of FIG. 3C. As a result, the time from landing to takeoff can be further shortened.

  The sole structure of a shoe according to the invention of claim 14 is the sole structure of the invention of claim 11, wherein the midsole is also provided on the front foot portion of the shoe, and the outsole plate in the invention of claim 11 An outsole plate in which the front and rear end faces are inclined in opposite directions is provided. In other words, in this case, the front end surface and the rear end surface of each outsole plate extend while gradually inclining toward the front end side of the forefoot part as it goes toward the sole contact surface of the midsole forefoot part.

  According to the sole structure of the fourteenth aspect of the present invention, when a downward pressing load acts on the outsole plate of the front foot when the weight moves to the front foot of the foot after landing on the heel, each outsole Shear deformation is performed so that the plate falls forward (not shown). Due to such shear deformation, when the weight moves to the forefoot, the outsole plate of the forefoot, and thus the wearer's foot, moves in the direction of travel by a predetermined amount.

Therefore, in this case, as in the case of the invention of claim 5, will be ankle angle alpha ₁ is increased when the weight shift of the forefoot, thereby, in the state of FIG. 3C from the state of FIG. 3B It becomes possible to move quickly, and the time from landing to takeoff can be shortened.

  In the invention of claim 6 or 15, the midsole portion or the outsole plate in the forefoot has a parallelogram shape or a trapezoidal longitudinal cross-sectional shape.

  The invention of claim 7 or 16 describes the contents of the present invention from the viewpoint of operation and effect, and the midsole portion or each outsole plate is deformed so as to fall forward when the weight moves to the front foot. This is a clear clarification of the points

  In the sole structure of the shoe according to the invention of claim 8, a plurality of recesses extending substantially in the vertical direction are formed on the side surface of the heel part of the midsole, and each of the recesses is a sole contact surface of the heel part. As it goes to the side, it gradually extends while inclining toward the rear end side of the heel part (see FIGS. 6 to 9).

  In this case, when a downward pressing load is applied when landing from the heel, the midsole portion sandwiched between adjacent concave portions is sheared and deformed so as to fall backward. Due to such shear deformation, at the time of landing, the heel portion of the midsole, and thus the wearer's foot, moves a predetermined amount backward in the direction opposite to the traveling direction.

As a result, as in the case of the invention of claim 1, the shoe wearer is not aware of the transition from the state of FIG. 3A to the state of FIG. 3B, but by shear deformation to the rear of the midsole heel part at the time of landing. The ankle joint angle α ₀ will decrease. This makes it possible to quickly shift from the state of FIG. 3A to the state of FIG. 3B. As a result, it is possible to shorten the time from landing to taking off.

  In the sole structure of the shoe according to the ninth aspect of the present invention, a plurality of concave portions extending substantially in the vertical direction are formed on the side surface of the front foot portion of the midsole, and each concave portion is a foot contact surface of the front foot portion. As it goes to the side, it gradually extends while inclining to the front end side of the forefoot region.

  In this case, when the weight moves to the forefoot part of the foot after landing from the heel and a downward pressing load acts on the forefoot part of the midsole, the midsole portion sandwiched between the adjacent recesses is Shear deformation so that it falls forward. Due to such shear deformation, when moving the weight to the forefoot, the forefoot part of the midsole, and thus the wearer's foot, moves a predetermined amount in the direction of travel.

As a result, as in the case of the invention of claim 5, the shoe wearer is not aware of the transition from the state of FIG. 3B to the state of FIG. so that the ankle angle alpha ₁ is increased by the shearing deformation in the. Thereby, it is possible to quickly shift from the state of FIG. 3B to the state of FIG. 3C. As a result, it is possible to further shorten the time from landing to takeoff.

  In the invention of claim 10, the hardness of the midsole is 35 to 70 in terms of the hardness of JIS K 7312 type, and in the invention of claim 17, the hardness of the outsole plate is in accordance with the hardness of JIS K 6253 type. 40 or more and 80 or less.

  According to the sole structure of the present invention, the time required for one cycle from landing to takeoff can be shortened.

  As shown in FIG. 1, a sole structure 1 of a shoe according to the present invention has a midsole 2 that extends from a heel part H of a shoe to an arch part (middle foot part) M to a front foot part F. Yes. The midsole 2 is, for example, a thermoplastic resin foam such as ethylene-vinyl acetate copolymer (EVA), a thermosetting resin foam such as polyurethane (PU), or a rubber material such as butadiene rubber or chloroprene rubber. It is comprised from the soft elastic member like the foam of this. As the hardness of the midsole 2, a hardness of 35 to 70, preferably 55 to 70 is used as the hardness of JIS K 7312 type.

A plurality of (here, two) grooves 20 extending substantially in the width direction are formed in the heel portion of the midsole 2. The center line C ₁ of each groove 20 is substantially orthogonal to the last center line C ₀ . As shown in FIG. 2A, each groove 20 is open to the grounding surface side (that is, the lower surface side) of the heel portion. Each groove 20 extends while inclining gradually toward the rear end 2e side of the heel part as it goes toward the sole contact surface side (that is, the upper surface side) of the heel part inside the heel part.

The cross-sectional shape in the front-rear direction of the midsole portion 25 formed between the grooves 20 adjacent in the front-rear direction has a parallelogram shape or a trapezoidal shape as shown in FIG. 2A. As shown in the figure, when the angles at both ends of the lower surface of the midsole portion 25 are θ ₁ and θ ₂ , respectively, θ ₁ <90 °, and preferably θ ₁ ≧ 30 °. If θ ₁ + θ ₂ = 180 °, the cross-sectional shape in the front-rear direction of the midsole portion 25 is a parallelogram. If θ ₁ + θ ₂ ≠ 180 °, the cross-sectional shape in the front-rear direction of the midsole portion 25 is trapezoidal. It becomes.

  The outsole plate 3 is bonded to the lower surface of each midsole portion 25 so as to cover it. The outsole plate 3 is composed of a member that is harder than the midsole 2. The hardness of the outsole plate 3 is 40 to 80, preferably 65 to 80 in terms of the hardness of JIS K 6253 type. Used.

  Further, in the example shown in FIG. 1, a plurality of grooves 21 similar to the grooves 20 are also formed on the outer part of the midsole part of the midsole 2. That is, these grooves 21 extend substantially in the width direction, open to the ground contact surface (lower surface) side of the outer part of the middle foot part, and the sole contact surface (upper surface) of the middle foot part inside the middle foot part. ) As it goes to the side, it gradually extends while inclining toward the rear end side of the midfoot part. In addition, an outsole plate 4 is bonded to the lower surface of each midsole portion formed between the grooves 21 adjacent in the front-rear direction so as to cover this.

  In the sole structure configured as described above, when a downward pressing load is applied when landing from the heel, the midsole portion 25 sandwiched between the adjacent grooves 20 is rearward (see FIG. 2B). Shear deformation to fall down (right). In FIG. 2B, the dotted line indicates the state before deformation, and the solid line indicates the state after deformation. Due to such shear deformation, when landing from the heel, the heel portion of the midsole 2 and thus the wearer's foot moves backward by Δ in the direction opposite to the traveling direction.

This will be considered in the landing state shown in FIG. 3A. When the foot moves backward by Δ at the time of landing from the heel, the position of the outermost protrusion point Q of the outer fruit is not changed in FIG. It moves backward (to the left in the figure) opposite to the right direction. As a result, the ankle joint angle α _0, which is an angle at which the line L connecting the radius upper end most protrusion point P and the outer fruit maximum protrusion point Q intersects the sole surface S, is reduced. In other words, the foot joint angle α ₀ decreases due to the shear deformation of the midsole heel part at the time of landing without the shoe wearer being aware of the transition from the state of FIG. 3A to the state of FIG. 3B. become. This makes it possible to quickly shift from the state of FIG. 3A to the state of FIG. 3B. As a result, the time from landing to takeoff can be shortened.

  Further, in this case, when a downward pressing load is applied to the outer side portion of the midfoot after landing from the heel or simultaneously with landing from the heel, the midsole portion sandwiched between the adjacent grooves 21 is As in the case of the sole portion 25, shear deformation is performed so as to fall backward. Due to such shear deformation, when landing on the outer part of the midfoot part of the shoe, the outer part of the midsole part of the midsole, and thus the wearer's foot, moves a predetermined amount backward in the direction opposite to the traveling direction.

As a result, the ankle joint angle α ₀ is reduced even when landing on the outer part of the middle foot region. As a result, it becomes possible to make a quick transition from the state of FIG. 3A to the state of FIG. 3B, and the time from landing to takeoff can be further shortened.

  In the example shown in FIG. 1, a plurality of grooves 22 that extend substantially in the width direction and open to the ground contact surface of the forefoot part are also formed in the forefoot part of the midsole 2. As shown in FIG. 4A, these grooves 22 extend while inclining gradually toward the front end 2f side of the forefoot part as they move toward the sole contact surface side of the forefoot part inside the forefoot part. That is, the inclination direction of the groove 22 inside the midsole is opposite to the inclination direction of the grooves 20 and 21. Further, the midsole portion 27 between the grooves 20 adjacent in the front-rear direction has a parallelogram shape or a trapezoidal cross-sectional shape in the front-rear direction, like the midsole portion 25. An outsole plate 5 is attached to the lower surface of each midsole portion 27 so as to cover it.

  In this case, after the landing from the heel, when the weight moves to the front foot portion of the shoe, if a downward pressing load acts on the front foot portion of the midsole 2, the midsole sandwiched between the adjacent grooves 22 As shown in FIG. 4B, the portion 27 is sheared so as to fall forward. In the figure, the dotted line indicates the state before deformation, and the solid line indicates the state after deformation. Due to such shear deformation, when the weight moves to the forefoot, the forefoot portion of the midsole 2 and thus the wearer's foot moves in the direction of travel by Δ ′.

This will be considered in the state at the time of weight transfer to the forefoot shown in FIG. 3B. If the foot moves forward by Δ ′ during the weight shift to the forefoot part, the position of the uppermost protrusion P of the radius of the leg does not change in FIG. It moves in the (right direction in the figure). Then, so that the ankle angle alpha ₁ of the line L connecting the fibula upper top突点P and lateral malleolus top突点Q is an angle intersecting the sole plane S is increased. In other words, the ankle joint angle α is obtained by the shear deformation of the front part of the midsole forward when the shoe wearer is not aware of the transition from the state of FIG. 3B to the state of FIG. ₁ will increase. Thereby, it is possible to quickly shift from the state of FIG. 3B to the state of FIG. 3C. As a result, the time from landing to takeoff can be further shortened.

[Other Example 1]
Although the example which formed the some groove | channels 20, 21, and 22 in the mid sole 2 was shown in the said Example, application of this invention is not limited to this. As shown in FIG. 5A, a groove is not formed in the midsole 2, and a plurality of outsole plates 3 'are provided on the lower surface of the heel portion of the midsole 2 with a space in the front-rear direction. The front end surface 3'f and the rear end surface 3'e of the sole plate 3 'extend while inclining toward the rear end 2e side of the midsole 2 as they go toward the ground contact surface side (that is, upward) of the heel portion of the midsole 2. An inclined surface may be used. Each outsole plate 3 ′ has a parallelogram shape or a trapezoidal cross-sectional shape in the front-rear direction, similar to the midsole portions 25, 27 of the above embodiment.

  In the sole structure configured as described above, when a downward pressing load is applied when landing from the heel, each outsole plate 3 'is sheared and deformed so as to fall backward (rightward in the figure) as shown in FIG. 5C. . In FIG. 5C, the solid line indicates the state before deformation, and the dotted line indicates the state after deformation. Due to such shear deformation, when landing from the heel, the heel portion of the midsole 2 and thus the wearer's foot moves backward by Δ ″ in the direction opposite to the traveling direction (see FIG. 5B).

As a result, as in the case of FIG. 2B of the above embodiment, the ankle joint angle α ₀ (FIG. 3A) decreases when landing from the heel. As a result, the shoe wearer can quickly transition from the state of FIG. 3A to the state of FIG. 3B without being aware of the transition from the state of FIG. 3A to the state of FIG. 3B. Can be shortened.

  Although not shown, a plurality of outsole plates 3 ′ arranged at intervals in the front-rear direction may be provided on the lower surface of the front foot portion of the midsole 2. However, in this case, the inclination of the front and rear end faces of the outsole plate 3 'is reversed from the case of FIG. 5A. That is, the front and rear end surfaces of the outsole plate 3 ′ are inclined surfaces that extend while inclining toward the front end 2 f side of the midsole 2 as they approach the ground contact surface side (that is, upward) of the front foot portion of the midsole 2.

In this case, as in the case of FIG. 4B of the above embodiment, when the weight moves to the front foot part of the shoe after landing from the heel, each outsole plate 3 'is sheared and deformed so as to fall forward. Thus, the forefoot portion of the midsole 2 and thus the wearer's foot moves a predetermined amount in the traveling direction. As a result, the ankle joint angle α ₁ (FIG. 3B) during weight shift to the forefoot. Will increase. Thus, the shoe wearer can make a quick transition from the state of FIG. 3B to the state of FIG. 3C without being aware of the transition from the state of FIG. 3B to the state of FIG. 3C. Can be further shortened.

[Other Example 2]
In the said Example, although the some groove | channel 20, 21, 22 penetrated in the width direction was formed in the mid sole 2, the application of this invention is not limited to this. As shown in FIGS. 6 to 9, the present invention can be similarly applied to a case where a recess is formed on the side surface of the midsole 2. In addition, in each figure, (a) is a side view of the collar part of a sole structure, (b) is the bb sectional view taken on the line. Each of the recesses 2c and 2c 'extends substantially in the vertical direction. On the side surface of the heel part of the midsole 2, the concave part 2c, 2c' gradually increases in the rear end 2e of the heel part gradually toward the sole contact surface side of the heel part. Inclined to the side.

  In the case shown in FIG. 6, a plurality of elliptical concave portions 2 c are formed on the side surface of the heel portion of the midsole 2. The recess 2c is formed such that its elliptical long axis is disposed obliquely upward toward the rear end 2e side of the heel portion of the midsole 2. The depth d of the recess 2c is set to 3 to 5 mm, for example.

  7 to 9, the recesses 2 c ′ extend to the lower surface of the midsole 2, and the center line in the longitudinal direction of each recess 2 c ′ is on the side of the rear end 2 e of the heel part of the midsole 2. It is arrange | positioned diagonally upward toward. Moreover, in the thing shown in FIG. 7, the recessed part and groove | channel are not formed in the outsole plate 3, but in the thing shown in FIG. 8, the recessed part 3c is formed in the outsole plate 3, and in what is shown in FIG. A groove 30 in the width direction connected to the recess 2c ′ is formed in the outsole plate 3.

6 to 9, in the same manner as in the case of FIGS. 2A and 5A of the above-described embodiment, the shearing deformation is performed so that the entire midsole 2 falls backward (rightward in the figure) when landing from the heel. As a result, the ankle joint angle α ₀ (FIG. 3A) decreases. As a result, the shoe wearer can quickly transition from the state of FIG. 3A to the state of FIG. 3B without being aware of the transition from the state of FIG. 3A to the state of FIG. 3B. Time to take off can be shortened.

  In addition, you may make it form the recessed parts 2c and 2c 'as shown in FIG. 6 thru | or FIG. However, in this case, the inclination directions of the recesses 2c and 2c ′ are opposite to those in the examples of FIGS. 6 to 9, that is, the heel part gradually increases toward the sole contact surface side of the heel part. Is inclined toward the front end 2f.

In this case, as in the case of FIG. 4A of the above embodiment, when the weight moves to the front foot portion of the shoe after landing from the heel, the midsole 2 is sheared and deformed so as to fall forward, The forefoot portion of the sole 2 and thus the wearer's foot moves a predetermined amount in the direction of travel. As a result, the ankle joint angle α ₁ (FIG. 3B) during weight shift to the forefoot. Will increase. Thus, the shoe wearer can make a quick transition from the state of FIG. 3B to the state of FIG. 3C without being aware of the transition from the state of FIG. 3B to the state of FIG. 3C. Can be further shortened.

It is a bottom view of the sole structure for shoes by one Example of this invention. It is a side view of the collar part of a sole structure (Drawing 1). It is a figure for demonstrating the deformation | transformation state of the collar part of a sole structure (FIG. 1). It is a figure for demonstrating the change of the ankle joint angle in 1 cycle from landing to takeoff in driving | running | working, Comprising: It is a figure which shows the state at the time of landing. It is a figure for demonstrating the change of the ankle joint angle in 1 cycle from landing to takeoff in driving | running | working, Comprising: It is a figure which shows the intermediate state until the takeoff after landing. It is a figure for demonstrating the change of the ankle joint angle in 1 cycle from landing to takeoff in driving | running | working, Comprising: It is a figure which shows the state at the time of takeoff. It is a side view of the front foot part of a sole structure (Drawing 1). It is a figure for demonstrating the deformation | transformation state of the forefoot part of a sole structure (FIG. 1). It is a side view of the collar part of the sole structure by the other Example of this invention. It is a figure for demonstrating the deformation | transformation state of the collar part of a sole structure (FIG. 5A). It is an enlarged view for demonstrating the deformation | transformation state of the outsole plate in the collar part of a sole structure (FIG. 5A). (A) is the side view of the collar part of the sole structure body by further another Example of this invention, (b) is the bb sectional view taken on the line. (A) is a figure which shows the modification of Fig.6 (a), (b) is the bb sectional view taken on the line. (A) is a figure which shows the modification of Fig.6 (a), (b) is the bb sectional view taken on the line. (A) is a figure which shows the modification of Fig.6 (a), (b) is the bb sectional view taken on the line.

Explanation of symbols

1: Sole structure

2: Midsole 2c, 2c ': Recess 2e: Rear end 2f: Front end 20, 21, 22: Groove 25, 27: Midsole portion

3, 3 ', 4, 5: Outsole plate 3'f: Front end surface 3'e: Rear end surface

Δ, Δ ′, Δ ″: Travel distance

H: Buttocks M: Middle foot F: Forefoot

Claims (17)

The sole structure of the shoe,
A midsole made of a soft elastic member provided at least on the heel of the shoe,
A plurality of grooves that extend substantially in the width direction and open to the ground contact surface side of the heel part are formed in the heel part of the midsole,
Each groove extends while inclining gradually toward the rear end side of the heel part as it goes toward the sole contact surface side of the heel part inside the heel part.
Sole structure of shoes characterized by that. In claim 1,
The midsole is also provided on the outer part of the middle foot part of the shoe, and the midsole part outer part of the midsole extends substantially in the width direction and opens on the ground contact surface side of the outer part of the middle foot part. A plurality of grooves are formed,
Each of the grooves extends while gradually inclining toward the rear end side of the midfoot part as it goes toward the sole contact surface side of the midfoot part inside the midfoot part.
Sole structure of shoes characterized by that. In claim 1 or 2,
The midsole portion arranged between the grooves adjacent in the front-rear direction has a parallelogram shape or a trapezoidal cross-sectional shape in the front-rear direction.
Sole structure of shoes characterized by that. In any of claims 1 to 3,
The midsole portion arranged between the grooves adjacent to each other in the front-rear direction is configured to be deformed so as to fall backward when the shoe lands.
Sole structure of shoes characterized by that. In claim 1,
The midsole is also provided on the forefoot of the shoe,
In the forefoot portion of the midsole, a plurality of grooves that extend substantially in the width direction and open to the ground contact surface side of the forefoot portion are formed,
Each of the grooves extends while gradually inclining toward the front end side of the forefoot part as it goes toward the sole contact surface side of the forefoot part inside the forefoot part.
Sole structure of shoes characterized by that. In claim 5,
The midsole portion arranged between the grooves adjacent in the front-rear direction has a parallelogram shape or a trapezoidal cross-sectional shape in the front-rear direction.
Sole structure of shoes characterized by that. In claim 5 or 6,
The midsole portion arranged between the grooves adjacent to each other in the front-rear direction is configured to be deformed so as to fall forward when the shoes land.
Sole structure of shoes characterized by that. The sole structure of the shoe,
With a midsole made of soft elastic material,
A plurality of recesses extending substantially in the vertical direction are formed on the side surface of the heel portion of the midsole,
Each of the recesses extends while gradually inclining toward the rear end side of the heel part as it goes toward the sole contact surface side of the heel part on the side surface of the heel part.
Sole structure of shoes characterized by that. The sole structure of the shoe,
With a midsole made of soft elastic material,
A plurality of recesses extending substantially in the vertical direction are formed on the side surface of the forefoot portion of the midsole,
Each of the recesses extends while inclining gradually toward the front end side of the forefoot part as it goes toward the sole contact surface side of the forefoot part on the side surface of the forefoot part.
Sole structure of shoes characterized by that. In claim 1, 2, 5, 8 or 9,
The midsole has a hardness of JIS K 7312 type of 35 or more and 70 or less,
Sole structure of shoes characterized by that. The sole structure of the shoe,
A midsole made of a soft elastic member provided at least on the heel of the shoe;
A plurality of outsole plates provided on the grounding surface side of the heel portion of the midsole and made of a member harder than the midsole and arranged at intervals in the front-rear direction;
The front end surface and the rear end surface of each outsole plate extend while inclining toward the rear end side of the midsole as it goes toward the ground contact surface side of the heel portion of the midsole.
Sole structure of shoes characterized by that. In claim 11,
Each outsole plate has a parallelogram shape or a trapezoidal longitudinal cross-sectional shape,
Sole structure of shoes characterized by that. In claim 11 or 12,
Each of the outsole plates is configured to be deformed so as to fall backward when the shoes land.
Sole structure of shoes characterized by that. In claim 11,
The midsole is also provided on the forefoot of the shoe,
The outsole plate is provided on the ground contact surface side of the forefoot portion of the midsole, is configured by a member that is harder than the midsole, and is configured by a plurality of plates that are spaced apart from each other in the front-rear direction. And
The front end surface and the rear end surface of each outsole plate extend while inclining toward the front end side of the forefoot part as it goes toward the ground contact surface side of the forefoot part of the midsole.
Sole structure of shoes characterized by that. In claim 14,
Each outsole plate has a parallelogram shape or a trapezoidal longitudinal cross-sectional shape,
Sole structure of shoes characterized by that. In claim 14 or 15,
Each outsole plate is configured to be deformed so as to fall forward when the shoes land.
Sole structure of shoes characterized by that. In claim 11 or 14,
The hardness of each outsole is 40 or more and 80 or less in terms of the hardness of JIS K 6253 type.
Sole structure of shoes characterized by that.

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