JP4851781B2 - Shoe with lateral vibration suppression function - Google Patents

Description

  The present invention relates to a shoe having a function of suppressing lateral vibration, and more particularly to an athletic shoe suitable for uses such as court competition in which lateral vibration is likely to occur.

In a court game such as basketball, an action of suddenly changing direction or stopping during running, or footwork in the lateral direction or the oblique lateral direction is likely to occur. At the time of such footwork, a lateral shake is likely to occur in which the foot is shifted inward or outward in the shoe. In order to realize a stable footwork, it is necessary to suppress such lateral vibration.
On the other hand, it is important not to interfere with the free flexion of the foot during exercise. In particular, it is important not to interfere with the bending of the foot at the MP joint.

The following Patent Documents 1 to 5 disclose shoe soles capable of suppressing the lateral deflection.
USP 6,497,058 B2 (ABSTRACT) JP 2001-286302 A (summary) JP-A-3-85102 (FIGS. 1 to 3) JP-A-7-8304 (Summary) JP 2001-29110 A (FIG. 4) Japanese Utility Model Publication No. 62-27125 (FIGS. 2 and 3)

  U.S.P. 6,497,058 B2 discloses a plurality of support elements rising from a base element. At the foot step, the base element has an arch. In the forefoot portion of the foot, the base element has a plurality of notches.

  JP 2001-286302 discloses an ankle sprain prevention shoe. This shoe includes a sprain prevention member having an L-shaped cross section. This member covers the ankle of the foot.

  Japanese Patent Laid-Open No. 3-85102 discloses a stabilizer made of rubber and having an L-shaped cross section. As for this stabilizer, the lower part protrudes outward.

  Japanese Patent Laid-Open No. 7-8304 discloses a lateral vibration prevention reinforcing member. This member has a winding portion that winds up from a member sandwiched between the outer sole and the midsole.

  Japanese Patent Application Laid-Open No. 2001-29110 discloses an apparatus provided with a reinforcing device at a step portion. The strengthening device is formed in a window frame shape.

  The midsole of Japanese Utility Model Sho 62-27125 has a region of high hardness on the outside of the foot.

  Stabilizers with an L-shaped cross-section will help to suppress foot rolls. On the other hand, a stabilizer having an L-shaped cross section has a high bending rigidity when the foot is bent, and thus will prevent free bending of the foot during exercise.

  Therefore, a main object of the present invention is to provide an athletic shoe that is difficult to prevent free bending of the foot and that can suppress lateral shaking of the foot.

  In order to enhance the function of suppressing the lateral movement of the foot, it is important to raise the winding part of the stabilizer. However, if the upper part of the roll is raised, when a force is applied to the outer side of the foot against the upper part of the roll, the upper part of the roll easily falls to the outer side of the foot. For this reason, it is difficult to increase the function of suppressing lateral shake.

  Therefore, another object of the present invention is to enhance the function of suppressing lateral vibration by making the winding part of the stabilizer difficult to fall.

  Generally, the stabilizer is formed of a material harder than the outer sole or the midsole. Therefore, it becomes difficult for the sole to bend in the portion of the stabilizer. On the other hand, stress concentration is likely to occur immediately before and immediately after the stabilizer made of a hard material, and the sole is easily bent. Such bias in the easiness of bending of the sole hinders free bending of the foot.

  On the other hand, the stabilizer provided long from the front foot to the rear foot of the sole is less prone to bend the sole easily. However, since the stabilizer is made by injection, the cost of the sole is greatly increased when the stabilizer is enlarged.

  Therefore, still another object of the present invention is to suppress a bias in the ease of bending of the sole by the stabilizer while suppressing an increase in cost.

  A shoe according to the present invention is a shoe having a lateral vibration suppression function, and an outer sole having a first lower surface having a grounding surface that contacts the ground when landing, and a first upper surface opposite to the first lower surface; A midsole disposed above the outer sole and having a second lower surface; a stabilizer for suppressing lateral movement of the foot, and the stabilizer extends from the outer side or the inner side of the foot toward the center in the width direction of the foot A non-foamed resin includes a substrate portion sandwiched between a first upper surface of the outer sole and a second lower surface of the midsole in a region and a winding portion wound upward from the substrate portion along a side surface of a shoe. The first upper surface of the outer sole has a first concavo-convex surface, and the first concavo-convex surface has a plurality of grooves and protrusions extending in the width direction of the foot. Alternately in direction The second bottom surface of the midsole has a second uneven surface, and the second uneven surface is positioned directly above the first uneven surface, and the second uneven surface is on the first uneven surface. The substrate portion of the stabilizer is formed in a waveform along the first uneven surface and the second uneven surface.

  The upper part that winds upward from the board part may cause the foot to protrude inward or outward from the original position in the shoe in a stepping operation in the lateral direction, or the foot may be inward or outward relative to the shoe. To prevent misalignment. That is, the upper part of the stabilizer suppresses the lateral shaking of the foot.

  When the sole bends with the dorsiflexion of the foot, the first lower surface of the outer sole expands and the second upper surface of the midsole contracts. On the other hand, when the sole bends with the plantar flexion of the foot, the first lower surface of the outer sole contracts and the second upper surface of the midsole expands. The substrate portion sandwiched between the outer sole and the midsole slightly expands or contracts with the foot flexion or dorsiflexion.

On the other hand, the stabilizer exerts the function of preventing the lateral movement of the foot, and therefore, the Young's modulus of the material constituting the stabilizer is larger than that of the midsole or the outer sole. For this reason, when the substrate portion of the hard stabilizer is flat, it is difficult to expand and contract, which hinders the ease of bending of the sole.
On the other hand, since the corrugated substrate portion is easily expanded and contracted like a spring, the easiness of bending of the sole is improved.

  It is preferable that such a substrate portion that easily expands and contracts is formed in a waveform in substantially the entire width in the foot width direction.

  In a preferred embodiment of the present invention, the substrate portion includes a lower plate portion disposed along the groove of the outer sole, an upper plate portion disposed along the protrusion of the outer sole, and the lower plate. And a rising plate portion connecting the upper plate portion and the upper plate portion are integrally formed and formed into the corrugated shape along the first uneven surface and the second uneven surface.

  In this case, in a further preferred embodiment, the thickness of the portion of the midsole disposed directly above the upper plate portion is equal to the thickness of the portion of the midsole disposed directly above the lower plate portion. The thickness of the portion of the outer sole that is smaller than the upper plate portion is smaller than the thickness of the portion of the outer sole that is disposed directly below the lower plate portion.

  In the case of this embodiment, since the thin part of the midsole and the thin part of the outer sole overlap, it is easy to bend at the thin upper plate part of both.

  In another preferred embodiment of the present invention, the winding portion has a front end in the front-rear direction of the foot, a rear end in the front-rear direction of the foot, and a top portion protruding upward between the front end and the rear end, The substrate portion is formed in the corrugated shape at least between the front end and the rear end.

  In this embodiment, when a load from above is applied to the corrugated substrate portion between the front end and the rear end of the winding portion, the upper plate portion bends downward and is displaced. The downward bending of the upper plate portion attracts the upper portion of the winding toward the center of the foot at the joint portion with the upper plate portion. As a result, the upper part of the roll falls toward the center of the foot, and the lateral shaking of the foot is suppressed.

  In a preferred embodiment of the present invention, the winding portion has a front end in the front-rear direction of the foot, a rear end in the front-rear direction of the foot, and a top portion protruding upward between the front end and the rear end. The upper winding part is formed in a substantially triangular shape connecting the top part, the front end and the rear end, and the upper plate part is disposed at least in the vicinity of the front end and in the vicinity of the rear end.

  The upper plate portion in the vicinity of the front end and in the vicinity of the rear end bends as described above, thereby pulling the front end and the rear end of the winding portion toward the center of the foot. When the front end and the rear end are drawn toward the center side, the apex that is the apex of the triangle is drawn toward the center side.

  Another shoe according to the present invention is a shoe having a lateral vibration suppressing function, and an outer sole having a first lower surface having a grounding surface that contacts the ground when landing, and a first upper surface opposite to the first lower surface. A midsole disposed above the outer sole and having a second lower surface; and a stabilizer for suppressing lateral movement of the foot, wherein the stabilizer is directed from the outside or inside of the foot toward the center in the width direction of the foot. A non-foamed body portion that is sandwiched between the first upper surface of the outer sole and the second lower surface of the midsole in a region that extends and a winding portion that winds upward from the substrate portion along the side surface of the shoe Are integrally formed of a resin plate, and are substantially L-shaped in cross section, wherein the winding portion includes a front end in the front-rear direction of the foot, a rear end in the front-rear direction of the foot, and the front end and the rear end Projecting upward between Thus, the upper part of the winding is formed in a substantially triangular shape connecting the top, the front end and the rear end, and in the upper part of the lower part of the top, the width of the foot increases as it goes upward. An inclined plate portion inclined toward the center is provided at the upper part of the winding.

  Since the inclined plate portion is inclined so as to be directed toward the center in the width direction of the foot as it goes upward at the lower portion of the top portion, the inclined plate portion supports the top portion of the substantially triangular winding portion falling down. Therefore, it is possible to suppress side shake.

  In a preferred embodiment of the present invention, the inclined plate portion is curved into a tapered cylindrical shape having a smaller curvature as going downward, and the apex of the inclined cylindrical plate portion is substantially directly below the top portion, or Located at the top.

  The inclined plate portion formed in a tapered cylindrical shape has higher rigidity than that of the flat plate shape. Therefore, it is easy to support the top part falling when a load is applied to the top part.

  In this case, in a further preferred embodiment, the midsole has a winding part that winds upward along the side surface of the foot, and the winding part of the midsole is located at a position corresponding to the tapered cylindrical inclined plate part. It has a bulging surface that bulges according to the tapered cylindrical inclined plate portion.

The tapered cylindrical inclined plate portion exhibits a large bending rigidity with respect to an external force acting on the top portion, but may be buckled when deformed. On the other hand, buckling of the tapered cylindrical inclined plate portion is prevented by forming the bulging surface at the upper part of the midsole. Therefore, since the force for supporting the top portion is increased, the lateral shake suppression function is significantly increased.
In addition, the midsole made of a resin foam is thick, but the inclined portion is thin, so that the weight of the sole is not hindered.

  Still another shoe according to the present invention is a shoe having a lateral vibration suppressing function, and an outerwear having a first lower surface having a grounding surface that contacts the ground when landing, and a first upper surface opposite to the first lower surface. A midsole disposed above the outer sole and having a second lower surface; a reinforcing plate provided along the second lower surface of the midsole and covering a stepped portion of the foot; And a stabilizer sandwiched between the first upper surface of the outer sole and the second lower surface of the midsole in a region extending from the outside or inside of the foot toward the center in the width direction of the foot. And a winding upper part that winds upward from the substrate portion along the side surface of the shoe are integrally formed of a non-foamed resin plate, and is substantially L-shaped in cross section. The foot extends from the stepped part of the foot toward the thumb ball along the inside of the foot, and the base plate portion of the stabilizer is located outside the foot so as to cover at least the entire proximal phalanx of the fifth finger from below. The stabilizer has a rear end portion that covers a part of the step portion, and the rear end portion of the stabilizer substrate portion overlaps a part of the reinforcing plate at the step portion.

  Since the rear end portion of the substrate portion of the stabilizer and the reinforcing plate partially overlap each other at the step portion, it is possible to prevent stress from being concentrated immediately after the stabilizer. Therefore, it is possible to suppress the bias in the easiness of bending of the sole.

  In this case, the reinforcing plate and the stabilizer are formed separately. For example, the reinforcing plate is formed by punching a film into a predetermined shape and then primary-molded, and then integrally molded on the second lower surface of the midsole. Glued. Since the cost of forming a film is lower than that of injection molding, an increase in cost can be suppressed.

Embodiment 1 of the present invention will be described below with reference to the drawings.
overall structure:
As shown in FIG. 1A and FIG. 1B, a shoe having the present lateral shake suppression function includes an outer sole 1, a midsole 2, a stabilizer 3, an upper 6, and a shoe race 7.

  As shown in FIG. 1B, the outer sole 1 includes a grounding surface 15 that is grounded when landing. The outer sole 1 has a first lower surface 1d having the ground contact surface 15 and a first upper surface 1u opposite to the first lower surface 1d shown in FIG. The outer sole 1 is formed of rubber or the like that is excellent in wear due to grounding.

  The midsole 2 is disposed above the outer sole 1. The midsole 2 has a second lower surface 2d (FIG. 5) that faces the outer sole 1, and a second upper surface 2u opposite to the second lower surface 2d. The midsole 2 is formed of a resin foam such as EVA, and mitigates the impact of landing.

  The stabilizer 3 is integrally formed of a non-foamed resin and has a substrate part 30 and a winding part 31. As shown in FIG. 8C, the stabilizer 3 has a substantially L-shaped cross section.

  As shown in FIG. 3, the substrate portion 30 is composed of a portion sandwiched between the first upper surface 1 u of the outer sole 1 and the second lower surface 2 d of the midsole 2. The substrate portion 30 is sandwiched between the outer sole 1 and the midsole 2 in a region extending from the outer side OUT of the foot toward the center in the foot width direction W. The winding part 31 consists of a part wound up upwards from the board | substrate part 30 along the side surface of shoes.

A first uneven surface 10 is formed on the first upper surface 1u of the outer sole 1 of FIG. 3 to be fitted to the third lower surface 3d of the substrate portion 30 of FIG. The first concavo-convex surface 10 does not need to be fitted to the third lower surface 3d of the substrate portion 30 without a gap, and there may be a slight gap between the two surfaces 10, 3d.
A second uneven surface 20 is formed on the second lower surface 2d of the midsole 2 in FIG. 5 to be fitted to the third upper surface 3u of the substrate portion 30 in FIG. The second concavo-convex surface 20 does not need to be fitted to the third upper surface 3u of the substrate portion 30 without a gap, and there may be a slight gap between the two surfaces 20, 3u.

A plurality of first grooves 13 _i and first protrusions 12 _i extending in the foot width direction W are alternately provided in the front-rear direction L of the foot on the first uneven surface 10 of the outer sole 1 shown in FIG. Is formed.
The second uneven surface 20 of the midsole 2 shown in FIG. 5 has unevenness corresponding to the first uneven surface 10 at a position directly above the first uneven surface 10 of the outer sole 1 shown in FIG. ing. That is, a plurality of second grooves 23 _i and second protrusions 22 _i extending in the foot width direction W are alternately formed in the front-rear direction L of the foot on the second uneven surface 20 of FIG. Yes.

Stabilizer 3:
Substrate part 30;
As shown in FIG. 8A, the substrate portion 30 of the stabilizer 3 includes a first uneven surface 10 of the outer sole 1 and a second uneven surface 20 of the midsole 2 between the front end 3f and the rear end 3b of the winding portion 31. It is formed in the waveform along.

The substrate portion 30 shown in FIG. 3 includes a lower plate portion 33 _i disposed along the first groove 13 _i of the outer sole 1 and an upper plate disposed along the first protrusion 12 _i of the outer sole 1. Part 32 _i . Each upper plate portion 32 _i is disposed between each lower plate portion 33 _i and 33 _{i + 1} . Each lower plate portion 33 _i or 33 _{i + 1} and each upper plate portion 32 _i are connected to each other via a rising portion 34 that rises obliquely from each lower plate portion 33 _i toward each upper plate portion 32 _i . . The upper plate portions 32 ₃ and 32 _{0 at} both ends are arranged in the vicinity of the front end 3 f and the vicinity of the rear end 3 b of the winding portion 31 of the stabilizer 3, respectively.
In FIG. 3, halftone dots are applied to the portions of the first grooves 13 _i and the lower plate portions 33 _i .

The first protrusion 12 _i and the first groove 13 _i of the outer sole 1 are formed along the upper plate portion 32 _i and the lower plate portion 33 _i of the stabilizer 3. 4A, the lower plate portion 33 _i of the stabilizer 3 is fitted into the first groove 13 _i of the outer sole 1, and the upper plate portion 32 _i of the stabilizer 3 is fitted to the first protrusion 12 _i of the outer sole 1. The stabilizer 3 and the outer sole 1 are bonded and fixed to each other with an adhesive. Stabilizer upper plate 32 ₀ of the rear end of the 3, into close contact with the stepped without the leading end portion 16 of the outer sole 1.

On the other hand, the second groove 22 _i and the second protrusion 23 _i of the midsole 2 shown in FIG. 5 are formed along the upper plate portion 32 _i and the lower plate portion 33 _i of the stabilizer 3. In FIG. 5, halftone dots are given to the portions of the second grooves 22 _i and the upper plate portions 32 _i . As shown in FIG. 6, the upper plate portion 32 _i of the stabilizer 3 is fitted into the second groove 22 _i of the midsole 2, and the lower plate portion 33 _i of the stabilizer 3 is fitted to the second protrusion 23 _i of the midsole 2. Are closely attached, and the stabilizer 3 and the midsole 2 are bonded and fixed to each other with an adhesive. The upper plate portion 32 ₀ of the stabilizer 3 is in close contact with the stepped without the leading end portion 26 of the midsole 2.

  As shown in FIG. 4A, the third lower surface 3 d (FIG. 5) of the substrate portion 30 of the stabilizer 3 fits into the first uneven surface 10 of the outer sole 1. On the other hand, as shown in FIG. 6, the third upper surface 3 u (FIG. 3) of the substrate portion 30 fits into the second uneven surface 20 of the midsole 2. That is, as shown in FIG. 4B, the stabilizer 3 is fitted between the outer sole 1 and the midsole 2.

Flexibility;
As described above, the substrate portion 30 of the stabilizer 3 shown in FIG. 8A is formed into a waveform by the upper plate portion 32 _i and the lower plate portion 33 _i . Therefore, for example, when a load from above is applied, as shown in FIG. 8B, the upper plate portion 32 _i bends downward and is displaced. By such displacement, the inclination angle of the upright portion 34 changes, and the length of the substrate portion 30 extends from the length L1 shown in FIG. 8A to the length L2 shown in FIG. 8B.
Therefore, the easiness of bending of the soles 1 and 2 is improved when the corrugated substrate portion 30 expands and contracts like a spring along with the plantar and dorsiflexion of the foot.

Here, the thickness of the portion of the midsole 2 disposed immediately above the upper plate portion 32 _i of the stabilizer 3 is smaller than the thickness of the midsole 2 disposed directly above the lower plate portion 33 _i. Is set. On the other hand, the thickness of the portion of the outer sole 1 disposed directly below the upper plate portion 32 _i is set smaller than the thickness of the portion of the outer sole 1 disposed directly below the lower plate portion 33 _i. Yes.
Thus, since the thin part of the midsole 2 and the thin part of the outer sole 1 overlap, it becomes easy to bend in the upper plate part 32 _i where the thin parts of both 1 and 2 overlap.

As shown in FIG. 3, notches 35 are provided in _two lower plate portions 33 ₂ and 33 ₃ in front of the stabilizer 3. Therefore, the easiness of bending of the soles 1 and 2 in the notch 35 can be improved along with the plantar flexion and dorsiflexion of the foot. Thus, in the present embodiment, both the upper plate portion 32 _i and the lower plate portion 33 _i are easily bent.

Upper part 31;
The winding portion 31 of the stabilizer 3 includes a top portion 40 that protrudes upward between the front end 3f and the rear end 3b in the front-rear direction L of the foot. The winding portion 31 of the stabilizer 3 is formed in a substantially triangular shape in which the top portion 40, the front end 3f, and the rear end 3b are connected.
As shown in FIG. 9, the positions of the front end 3 f and the rear end 3 b of the winding part 31 are arranged closer to the center in the foot width direction W than the position of the top 40.

  As shown in FIG. 5, in the winding upper part 31 of the stabilizer 3, a first reinforcing protrusion 43 along the first oblique side part 41 is formed in the first oblique side part 41 connecting the top part 40 and the front end 3 f. Has been. On the other hand, a second reinforcing protrusion 44 extending along the second oblique side 42 is formed on the second oblique side 42 connecting the top 40 and the rear end 3b. The 1st reinforcement protrusion 43 and the 2nd reinforcement protrusion 44 are mutually connected in the top part 40 of the winding part 31, and are formed as one protrusion.

As shown in FIG. 1A, the winding upper portion 31 of the stabilizer 3 is bonded and fixed between the outer sole 1, the midsole 2 and the upper 6 with an adhesive. The top 40 of the winding part 31 protrudes from between the outer sole 1 and the midsole 2.
As shown in FIG. 5, an engagement protrusion 37 that engages with the engagement hole 17 drilled in the outer sole 1 is formed on the substrate portion 30 and the winding portion 31 of the stabilizer 3.

  As shown in FIG. 7A, the base plate portion 30 of the stabilizer 3 covers substantially the entire head C5f and proximal phalanx B5 of the metatarsal bone C5 of the fifth finger f5 of the foot from below. On the other hand, as shown in FIG. 7B, the winding part 31 covers the metatarsal head C5f of the fifth finger f5 of the foot from the outside of the foot.

Suppression of side shake;
The stabilizer 3 is integrally formed of a non-foamed resin that is harder (Young's modulus and / or higher hardness) than the outer sole 1 and the midsole 2. For this reason, the foot 31 protrudes inward or outward from the original position in the shoe in a lateral stepping operation or the like by the upper part 31 wound upward from the substrate part 30, It is possible to suppress relative displacement to the outside. Therefore, the winding part 31 of the stabilizer 3 can suppress the lateral shaking of the foot.

  As shown in FIG. 1A, the protruding portion 49 of the winding portion 31 of the stabilizer 3 is bonded to the outer surface of the upper 6. The protruding portion 49 of the stabilizer 3 is pulled up along the outer shape of the foot by the shoe race 7 through the upper 6. Therefore, since the winding upper part 31 of the stabilizer 3 is attracted to the foot, it is possible to prevent the foot from being displaced relative to the shoe, and to further suppress the lateral shaking of the foot.

As shown in FIG. 9, the substrate portion 30 of the stabilizer 3 is bent and displaced downward as described above when a load from above is applied. Downward deflection of the upper plate portion 32 _i attracts toward the center side of the foot-winding portion 31 in the connecting portion between the upper plate portion 32 _i. Thereby, as shown with a dashed-two dotted line, since the winding upper part 31 falls down toward the center of a leg | foot, the side shake of a leg | foot is suppressed.

Upper plate 32 of the base plate portion 30 of the stabilizer 3 shown in FIG. 8A _3, 32 _0, by displacement as described above by a load from above, the center side of the foot front 3f and the rear end 3b of the wrapping section 31 Attract to. Therefore, the top part 40 which is the vertex of the triangle of the winding part 31 is drawn toward the center side. Accordingly, lateral movement of the foot is suppressed.

Inclined plate portion 45 _i ;
As shown in FIG. 5, the winding portion 31 of the stabilizer 3 is provided with a plurality of inclined plate portions 45 _i . Each inclined plate portion 45 _i is smoothly wound upward from each lower plate portion 33 _i of the substrate portion 30. As shown in FIG. 3, the inclined plate portion 45 _i is formed in a tapered cylindrical shape having a curvature that decreases in the downward direction. As shown in FIG. 8C, the inclined plate portion 45 _i is inclined so as to go to the center in the width direction W of the foot as it goes upward.

In this way, the inclined plate portion 45 _i is inclined so as to be directed toward the center in the foot width direction W as it goes upward, so that the winding portion 31 falls down toward the outer OUT direction in the foot width direction W. Support. Therefore, it is possible to suppress side shake.
Further, the inclined plate portion 45 _i formed in a tapered cylindrical shape has higher rigidity than that of the flat plate shape. Therefore, it is easy to support the top 40 falling when a load is applied to the top 40 of the winding part 31.

In particular, as shown in FIG. 5, among the plurality of inclined plate portions 45 _i , the inclined plate portion 45 ₂ positioned substantially at the center is relatively larger than the other inclined plate portions 45 _i and has a tapered cylindrical shape. Since the apex 46 is positioned almost directly below the top 40 of the winding part 31, it is possible to support the top 40 having a large moment during lateral swinging from falling.

Bulging surface 25 _i ;
As shown in FIG. 2, the midsole 2 has a winding portion 21 that winds upward along the side surface of the foot. Wherein the roll-up portion 21, at a position corresponding to the inclined plate portion 45 _i of the stabilizer 3, the bulging surface 25 _i bulged in accordance with the tapered cylindrical inclined plate portion 45 _i is formed.

Here, the inclined cylindrical plate portion 45 _i having a tapered cylindrical shape exhibits a large bending rigidity against an external force acting on the top portion 40 of the winding portion 31, but may be buckled when deformed. On the other hand, buckling of the tapered cylindrical inclined plate portion 45 _i is prevented by forming the bulging surface 25 _i at the winding portion 21 of the midsole 2. For this reason, since the force for supporting the top portion 40 is increased, the lateral vibration suppressing function is remarkably enhanced.

In FIG. 7A and FIG. 8C, the main hardness in the area | region which gave the halftone dot of the outer part 2H of the width direction W of the midsole 2 is 5 in JISC hardness rather than the main hardness in the area | region of the inner side of the midsole 2, and the center part 2S. It may be set larger by 15 to 15 degrees. For example, the hardness range of the inner portion 2S and the center portion 2S of the midsole 2 may be 50 degrees or more and less than 60 degrees in JISC hardness, and the hardness range of the outer portion 2H may be 60 degrees or more and less than 70 degrees in JISC hardness.
Thus, by increasing the hardness of the outer portion 2H of the midsole 2, the sinking of the outer side OUT of the foot is prevented, and the winding portion 21 (FIG. 8C) of the midsole 2 is less likely to fall. Therefore, the lateral shake suppression function is enhanced.

  In FIG. 8C, the boundary between the outer part 2H having different hardness and the inner part and the center part 2S is set to be vertical. May be.

  Next, Example 2 will be described with reference to FIG. In the following embodiments, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIG. 10, a reinforcing plate 5 having a so-called shank function is fixed to the midsole 2. The reinforcing plate 5 extends from the stepped portion 22 along the inner side IN of the foot toward the thumb ball Q, and is rearward from the stepped portion 22 to a position covering a part of the heel 23 of the foot. It extends to. A rib 51 is formed in the front-rear direction L of the foot at approximately the center in the width direction W of the reinforcing plate 5.

On the other hand, the stabilizer 3 extends along the outer side OUT of the foot so as to cover substantially the entire proximal phalange B5 of the fifth finger f5 from below, and a rear end portion 36 covering a part of the stepped portion 22 is provided. Have. The rear end portion 36 of the stabilizer 3 overlaps a part of the reinforcing plate 5 at the front end portion of the stepping portion 22.
Therefore, a substantially Y-shaped shape is formed by the stabilizer 3 and the reinforcing plate 5.

  As described above, since the rear end portion 36 of the stabilizer 3 and the reinforcing plate 5 partially overlap each other in the step portion 22, it is possible to prevent stress from being concentrated immediately after the stabilizer 3. Therefore, it is possible to suppress the bias in the easiness of bending of the sole.

  The reinforcing plate 5 is, for example, stamped into a predetermined shape and subjected to primary molding, and then secondary molded integrally with the second lower surface 2 d of the midsole 2. On the other hand, the stabilizer 3 is bonded to the second lower surface 2d of the midsole 2 with an adhesive after being injection-molded. Compared with injection molding, since the cost of film formation is low, even if the reinforcing plate 5 having a relatively large area is provided, an increase in cost can be suppressed.

Next, Example 3 will be described with reference to FIG. In the third embodiment, parts different from the first embodiment will be mainly described.
As shown in FIG. 11, the rear end portion 36 of the stabilizer 3A is extended so as to cover substantially the entire bottom surface of the metatarsal bone C5. Therefore, it is possible to prevent stress from being concentrated immediately after the stabilizer 3A.
In the stabilizer 3 of the first embodiment shown in FIG. 5, constricted lower plate portion 33 _i is has been formed, as shown in FIG. 11, the stabilizer 3A of the third embodiment, the lower plate portion 33 _i No constriction is formed. In this case, the width in the front-rear direction of the upper plate portion 32 _i , the first protrusion 12 _i and the first groove 13 _i in FIG. 3 is substantially constant.
The stabilizer substrate part need not be bonded between the outer sole and the midsole without any gap, and may have a structure in which some space is provided. An effect is obtained .

As described above, the preferred embodiments have been described with reference to the drawings. However, those skilled in the art will readily understand various changes and modifications within the obvious scope by looking at the present specification.
And in running shoes For example, by placing the stabilizer inside the heel portion, it is possible to obtain the effect of preventing over-pronation.
The corrugated substrate portion may have a cross-sectional shape that is sinusoidal.
Further, it is not always necessary to provide a plurality of inclined plate portions of the stabilizer.
Accordingly, such changes and modifications are to be construed as within the scope of the present invention as defined by the claims.

  The present invention can be applied to shoes for various uses such as table tennis, aerobics, running, and walking in addition to court competitions such as basketball, handball, and volleyball.

FIG. 1A is a schematic perspective view of a shoe for a left foot according to Embodiment 1 of the present invention as viewed from an oblique outer side, and FIG. 1B is a schematic perspective view of the shoe for the left foot as viewed from the diagonal bottom side. FIG. 2 is an exploded perspective view of the shoe sole as viewed obliquely from the outside. FIG. 3 is an exploded perspective view of the shoe sole as viewed mainly from the diagonally inner side of the front foot portion and the middle foot portion. FIG. 4A is an exploded perspective view of a front sole portion of the shoe sole as viewed from obliquely inside, and FIG. 4B is an exploded perspective view after the assembly. FIG. 5 is an exploded perspective view seen from the bottom side. FIG. 6 is an exploded perspective view of the shoe sole in which a stabilizer is joined to the midsole. FIG. 7A is a plan view showing the positional relationship between the stabilizer and the skeleton of the foot, and FIG. 7B is a side view thereof. 8A is a longitudinal sectional view of a shoe sole stabilizer, FIG. 8B is a longitudinal sectional view of the shoe sole compressed up and down, and FIG. 8C is a transverse sectional view. FIG. 9 is a perspective view of the stabilizer as seen from the back of the foot. FIG. 10 is a bottom view of a shoe sole in a state where a stabilizer is attached to the midsole according to the second embodiment (the outer sole is removed). FIG. 11 is a bottom view of the midsole and the stabilizer according to the third embodiment.

Explanation of symbols

1: Outer sole 1d: first lower surface 1u: the first upper surface 10: first uneven surface 12 _i: first protrusion 13 _i: the first groove 15: the ground plane 2: midsole 2d: second lower surface 20: second uneven surface 22: stepped not 23: heel 25 _i: bulging surface 3: stabilizer 3b: rear 3f: front 30: substrate 31: winding portion 32 _i: the upper plate portion 33 _i: the lower plate 34: the raised portion 36 : Rear end portion 40: top portion 41: first oblique side portion 42: second oblique side portion 43: first reinforcing protrusion 44: second reinforcing protrusion 45 _i : inclined plate portion 46: apex 5: reinforcing plate f5: fifth Finger B5: proximal phalanx of the fifth finger C5f: metatarsal head of the fifth finger IN: inside of the foot OUT: outside of the foot Q: thumb ball W: foot width direction

Claims (17)

A shoe having a lateral vibration suppression function,
An outer sole having a first lower surface having a ground surface to be grounded upon landing, and a first upper surface opposite to the first lower surface;
A midsole disposed above the outer sole and having a second lower surface;
With a stabilizer that suppresses the lateral movement of the foot,
The stabilizer is sandwiched between the second lower surface of the first upper surface and said midsole of the outer sole in the realm of up to center of the width direction of the outer side or et foot leg, toward the inner side than the central The substrate portion that does not extend and the upper winding portion that winds upward from the substrate portion along the side surface of the shoe are integrally formed of a non-foamed resin plate,
The first upper surface of the outer sole has a first concavo-convex surface, and the first concavo-convex surface is formed by alternately providing a plurality of grooves and protrusions extending in the width direction of the foot in the front-rear direction of the foot,
The second lower surface of the midsole has a second uneven surface, and the second uneven surface has unevenness corresponding to the first uneven surface at a position directly above the first uneven surface,
The stabilizer has a substrate portion formed in a corrugated shape along the first uneven surface and the second uneven surface. A shoe having a lateral vibration suppression function,
An outer sole having a first lower surface having a ground surface to be grounded upon landing, and a first upper surface opposite to the first lower surface;
A midsole disposed above the outer sole and having a second lower surface;
With a stabilizer that suppresses the lateral movement of the foot,
The stabilizer is sandwiched between the second lower surface of the first upper surface and said midsole of the outer sole in the realm from the inner side of the foot to the center of the width direction of the foot, outward than the center A non-foamed resin plate and a substrate portion that does not extend and a winding upper portion that winds upward from the substrate portion along the side surface of the shoe are integrally formed,
The first upper surface of the outer sole has a first concavo-convex surface, and the first concavo-convex surface is formed by alternately providing a plurality of grooves and protrusions extending in the width direction of the foot in the front-rear direction of the foot,
The second lower surface of the midsole has a second uneven surface, and the second uneven surface has unevenness corresponding to the first uneven surface at a position directly above the first uneven surface,
The stabilizer has a substrate portion formed in a corrugated shape along the first uneven surface and the second uneven surface. 3. The substrate portion according to claim 1, wherein the substrate portion includes a lower plate portion disposed along the groove of the outer sole, an upper plate portion disposed along the protrusion of the outer sole, and the lower plate portion. And a raised plate part that connects the upper plate part and the upper plate part are integrally formed and formed into the corrugated shape along the first uneven surface and the second uneven surface.   In Claim 3, The thickness of the part of the midsole arranged just above the upper board part is smaller than the thickness of the part of the midsole arranged just above the lower board part, and The shoe has a thickness that is smaller than the thickness of the portion of the outer sole that is disposed directly below the lower plate portion. In Claim 1 or 2 , the winding part has a front end in the front-rear direction of the foot, a rear end in the front-rear direction of the foot, and a top portion protruding upward between the front end and the rear end,
A shoe in which the substrate portion is formed in the corrugated shape at least between the front end and the rear end. In Claim 3, the said winding upper part has the front end of the front-back direction of a leg, the rear end of the front-back direction of a foot, and the top part which protrudes upwards between the said front end and rear end, Thereby, the said winding The upper part is formed in a substantially triangular shape connecting the top part, the front end and the rear end,
A shoe in which the upper plate portion is disposed at least in the vicinity of the front end and in the vicinity of the rear end.   The shoe according to claim 6, wherein the positions of the front end and the rear end are arranged closer to the center side in the width direction of the foot than the position of the top.   In Claim 6, the 1st reinforcement | strengthening protrusion along the 1st oblique side part which connected the said top part and the said front end, and the 2nd reinforcement | strengthening protrusion along the 2nd oblique side part which connected the said top part and the said rear end. A shoe further equipped with.   In Claim 1, the said board | substrate part covers the whole metatarsal bone head and proximal phalanx of the 5th finger | toe of a foot | leg from the downward direction at least, and the said winding part is a metatarsal at least of the 5th finger | toe of a foot | leg. Shoes that cover the head of the bone from the outside of the foot. A shoe having a lateral vibration suppression function,
An outer sole having a first lower surface having a ground surface to be grounded upon landing, and a first upper surface opposite to the first lower surface;
A midsole disposed above the outer sole and having a second lower surface;
With a stabilizer that suppresses the lateral movement of the foot,
The stabilizer is provided on a side surface of a shoe, a base plate portion sandwiched between a first upper surface of the outer sole and a second lower surface of the midsole in a region extending from the outer side or the inner side of the foot toward the center in the width direction of the foot. A winding upper part that winds upward from the substrate part is integrally formed with a non-foamed resin plate, and is substantially L-shaped in cross section,
The winding portion has a front end in the front-rear direction of the foot, a rear end in the front-rear direction of the foot, and a top portion that protrudes upward between the front end and the rear end. It is formed in a roughly triangular shape with the front end and rear end connected,
A shoe in which an inclined plate portion that is inclined toward the center in the width direction of the foot as it goes upward is provided at the upper portion of the winding portion below the top portion.   11. The inclined plate portion according to claim 10, wherein the inclined plate portion is curved into a tapered cylindrical shape having a smaller curvature as going downward, and the apex of the inclined inclined cylindrical plate portion is substantially directly below the top portion or positioned at the top portion. Shoes.   12. The midsole according to claim 11, wherein the midsole has a winding part that winds upward along a side surface of the foot, and the winding part of the midsole has the tapered cylindrical shape at a position corresponding to the tapered cylindrical inclined plate part. Shoes with a bulging surface that bulges according to the inclined plate.   In Claim 10, The said board | substrate part covers the whole metatarsal bone head and proximal phalanx of the 5th finger | toe of a foot | leg from the downward direction at least, and the said winding part is a metatarsal at least of the 5th finger | toe of a foot | leg. Shoes that cover the bone head from the outside. A shoe having a lateral vibration suppression function,
An outer sole having a first lower surface having a ground surface to be grounded upon landing, and a first upper surface opposite to the first lower surface;
A midsole disposed above the outer sole and having a second lower surface;
A reinforcing plate provided along the second lower surface of the midsole and covering a stepped portion of the foot;
With a stabilizer that suppresses the lateral movement of the foot,
The stabilizer is provided on a side surface of a shoe, a base plate portion sandwiched between a first upper surface of the outer sole and a second lower surface of the midsole in a region extending from the outer side or the inner side of the foot toward the center in the width direction of the foot. A winding upper part that winds upward from the substrate part is integrally formed with a non-foamed resin plate, and is substantially L-shaped in cross section,
The reinforcing plate extends from the stepped portion of the foot toward the thumb ball along the inside of the foot,
The stabilizer base portion has a rear end portion extending along the outer side of the foot so as to cover at least the entire proximal phalanx of the fifth finger from below and covering a part of the stepped portion,
A shoe in which a rear end portion of a substrate portion of the stabilizer overlaps a part of the reinforcing plate at the stepped portion.   15. The shoe according to claim 14, wherein the reinforcing plate is formed integrally with a second lower surface of the midsole, and the stabilizer is bonded to the second lower surface of the midsole with an adhesive.   15. The shoe according to claim 14, wherein the reinforcing plate extends rearward to a position covering a part of the heel of the foot. In Claim 1, the said board | substrate part covers the metatarsal bone head of the 5th finger | toe of a foot | leg from below, and does not extend to a heel, The said winding part is at least the 5th finger | toe of a foot | leg. Shoes that cover the metatarsal bone head from the outside of the foot.

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