JP2020048687A - Sole structure and shoe using the same - Google Patents

Abstract

To provide a sole structure for a shoe capable of facilitating kick out in a front direction in running, and securing cushion property in grounding.SOLUTION: A sole structure 1 comprises: a plate 4 which is arranged on a position corresponding to at least a forefoot F and a middle foot part M of a foot of a wearer and is arranged and laminated between an outsole 2 and a midsole 3; and a buffer which is arranged to face a sole surface of a wearer on a position corresponding to the middle foot part M and a heel part H of a foot of a wearer, and can absorb impact in a vertical direction applied to a top surface. The buffer and the plate body 5 are overlapped with each other in a vertical direction on a position corresponding to the middle foot part M of a foot of a wearer.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a sole structure and shoes using the same.

  2. Description of the Related Art Conventionally, as a sole structure for shoes that has been considered so as to reduce a burden on a foot of a person who wears shoes during running (hereinafter, referred to as “wearer”), for example, a sole structure as described in Patent Document 1 is known. Proposed.

  In Patent Document 1, an outsole, a midsole made of a soft elastic material laminated on the upper side of the outsole, an upper plate laminated on the upper surface of the midsole, and And a lower plate laminated on the sole. Each of the upper plate and the lower plate is made of a material having a higher rigidity than the material of the midsole, and is disposed so as to correspond to a range from the heel portion of the wearer's foot to the middle foot portion to the forefoot portion.

JP-A-2017-035170

  By the way, runners who prefer to run efficiently have a cushioning property when the sole structure of the shoe is in contact with the ground or the road surface during running (hereinafter referred to as “ground contact”) and ease of kicking forward. Tend to seek. Among them, regarding the cushioning property, in the sole structure, a shock in the vertical vertical direction mainly occurs at a position corresponding to the rear foot part and / or the middle foot part of the wearer's foot immediately after the touchdown. Therefore, in order to improve the cushioning property at the time of contact with the ground, it is important to appropriately absorb the impact in the vertical direction.

  However, in the sole structure of Patent Literature 1, the upper plate stacked on the upper surface of the midsole is configured to face the underside of the wearer's foot. For this reason, the impact force in the vertical direction, particularly immediately after touchdown, is not absorbed by the upper plate, and the impact force is directly transmitted to the heel of the wearer's foot via the upper plate. That is, in the sole structure of Patent Literature 1, the impact in the vertical and vertical directions at the time of contact with the ground cannot be appropriately absorbed, and the cushioning property at the time of contact with the ground has been impaired.

  The present invention has been made in view of such a point, and an object of the present invention is to make it easy to kick forward when traveling and to ensure cushioning when the vehicle touches the ground.

  In order to achieve the above object, a first embodiment of the present invention relates to a sole structure for shoes, and the sole structure is formed of an outsole and an elastic material having lower rigidity than the outsole, A midsole stacked on the upper side of the outsole, and a plate arranged at least at a position corresponding to the forefoot portion and the middle foot portion of the wearer's foot and stacked between the outsole and the midsole; A buffer that is arranged to face the back of the wearer's foot at a position corresponding to the middle foot and the rear foot of the wearer's foot, and is capable of absorbing vertical vertical impact applied to the upper surface; . The plate has a plate body formed of a material that is less stretchable than the outsole and formed in a thin-walled shape having a smaller thickness than the midsole. And the buffer body and the plate main body are characterized by being vertically overlapped with each other at a position corresponding to the middle foot of the wearer's foot.

  In the first mode, at a position corresponding to the rear foot of the wearer's foot, the shock absorber arranged to face the back of the wearer's foot appropriately reduces the impact force in the vertical direction, especially immediately after touchdown. Absorbed. Thereby, the cushioning property at the time of ground contact is ensured.

  In addition, at a position corresponding to the middle foot of the wearer's foot, the buffer body and the plate main body are vertically overlapped with each other. With this configuration, in the position corresponding to the middle foot of the wearer's foot, the vertical impact force at the time of touchdown is appropriately absorbed by the shock absorber, and the plate body suppresses excessive bending of the sole structure. You. That is, at the position corresponding to the middle foot of the wearer's foot, the cushioning property is ensured by the buffer, and the wearer's foot can be stably supported by the plate body. And since a plate is arrange | positioned in the position corresponding to at least the forefoot part and the middle foot part of a wearer's foot, it becomes easy to make the part of the outsole corresponding to the said position smoothly contact the ground or a road surface.

  Further, at a position corresponding to the forefoot of the wearer's foot, the plate body suppresses excessive bending of the sole structure. Then, when the outsole contacts the ground or the road surface, the stress accumulated in the plate body is converted into energy for kicking forward. This facilitates kicking forward during traveling.

  Therefore, in the first embodiment, it is possible to facilitate kicking forward during traveling and to ensure cushioning when the vehicle touches the ground.

  The second mode is characterized in that, in the first mode, the front end of the buffer is located at a position corresponding to the middle foot of the wearer's foot.

  In the second embodiment, the front end of the shock absorber is disposed at a position corresponding to the middle foot of the wearer's foot. That is, the buffer is not disposed at a position corresponding to the forefoot of the wearer's foot. For this reason, in the position corresponding to the forefoot part of the wearer's foot, the plate body suppresses the excessive bending of the sole structure and further enhances the effect of facilitating kicking forward during running. Can be.

  The third mode is characterized in that, in the second mode, the shock absorber has an inclined portion whose at least front end is inclined rearward downward.

  In the third embodiment, the inclined portion of the shock absorber gradually reduces the cushioning property at the position corresponding to the middle foot of the wearer's foot as the ground contact portion of the outsole moves forward. For this reason, at the time of touchdown, it is possible to shift to a forward kicking operation while reducing the cushioning property of the buffer so as not to cause a feeling of discomfort to the wearer's foot.

  The fourth mode is characterized in that, in the second mode, the shock absorber is formed in a stepped shape so that the front end portion moves backward toward the rear as the front end portion moves downward.

  In the fourth embodiment, the outsole is formed at a position corresponding to the middle foot of the wearer's foot because the front end of the shock absorber is formed to be stepped backward as it goes downward. As the contact portion moves forward, the cushioning property gradually decreases. For this reason, at the time of touchdown, it is possible to shift to a forward kicking operation while reducing the cushioning property of the buffer so as not to cause a feeling of discomfort to the wearer's foot.

  The fifth mode is characterized in that in any one of the first to third modes, the plate body is formed of a material having higher rigidity than the outsole.

  In the fifth embodiment, the plate body made of a material having higher rigidity than the outsole further suppresses excessive bending of the sole structure. Therefore, the instantaneous power of kicking forward during traveling can be further increased.

  In a sixth mode, in any one of the first to fifth modes, the plate body includes a protruding portion protruding upward from a peripheral edge of at least one of the inner and outer shell sides. And the protrusion part is arrange | positioned at the position corresponding to at least the midfoot part of a wearer's foot, It is characterized by the above-mentioned.

  In the sixth embodiment, the rigidity of the plate body can be increased by the protruding portion at at least one of the inner back side and the outer back side and at least a position corresponding to the middle foot of the wearer's foot. Becomes Therefore, at the position corresponding to the middle foot of the wearer's foot, the wearer's foot can be more stably supported by the plate body.

  In a seventh mode, in any one of the first to sixth modes, the plate has at least one opening formed to penetrate a part of the plate body in the up-down direction. The opening is covered by the outsole from below.

  In the seventh embodiment, since the opening is formed so as to vertically penetrate a part of the plate body, the plate body does not exist in the opening. Further, since the opening is covered from below by the outsole, the entire lower surface of the plate body does not contact the upper surface of the outsole. For this reason, when the wearer kicks forward, even when the outsole is sandwiched between the ground or the road surface and the plate, the pressure when the lower plate touches the ground or the road surface, It becomes easy to escape from the outsole to the midsole through the opening. Thereby, abrasion of the outsole is suppressed. As a result, damage to the outsole due to aging can be suppressed.

  The eighth mode is characterized in that, in the seventh mode, the opening is formed such that the length in the foot length direction is longer than the length in the foot width direction.

  In the eighth embodiment, the opening is formed such that the length in the foot length direction is longer than the length in the foot width direction. This makes it possible to relatively increase the bending rigidity of the plate body in the foot length direction. As a result, excessive bending of the sole structure in the foot length direction is suppressed, and kicking forward during running becomes easier.

  A ninth aspect is a shoe including the sole structure according to any one of the first to eighth aspects.

  In the ninth embodiment, it is possible to obtain a shoe having the same operation and effects as those of the first to eighth embodiments.

  As described above, according to the present invention, it is possible to facilitate kicking forward during traveling and to secure cushioning properties when touching the ground.

FIG. 1 is a plan view showing a sole structure according to the embodiment. FIG. 2 is a bottom view showing the sole structure according to the embodiment. FIG. 3 is a side view showing the sole structure according to the embodiment as viewed from the outer shell side. FIG. 4 is a sectional view taken along line IV-IV of FIG. FIG. 5 is a sectional view taken along line VV of FIG. FIG. 6 is a sectional view taken along line VI-VI of FIG. FIG. 7 is a sectional view taken along line VII-VII of FIG. FIG. 8 is a view corresponding to FIG. 1, which virtually shows a state in which the skeletal structure of the wearer's foot is overlapped with the plate of the sole structure according to the embodiment. FIG. 9 is a diagram corresponding to FIG. 4 showing a first modification of the sole structure according to the embodiment. FIG. 10 is a diagram corresponding to FIG. 4 showing a second modification of the sole structure according to the embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The description of the embodiments below is merely an example in nature, and is not intended to limit the present invention, its applications, and its uses.

  FIG. 1 shows an entire sole structure 1 according to an embodiment of the present invention. The shoes provided with the sole structure 1 are used, for example, as sports shoes for running or various sports.

  Here, the sole structure 1 illustrates only the sole structure 1 of the left foot shoe. The sole structure 1 of the right foot shoe is configured to be symmetrical to the left foot shoe. Therefore, in the following description, only the sole structure 1 of the left foot shoe will be described, and the description of the sole structure 1 of the right foot shoe will be omitted.

  In the following description, upper (upper) and lower (lower) represent the vertical positional relationship of the sole structure 1. The front side and the rear side indicate the positional relationship of the sole structure 1 in the foot length direction. The inner side and the outer side indicate the positional relationship of the sole structure 1 in the foot width direction. 1 and 8, a position corresponding to the forefoot portion of the foot of a person wearing the shoe having the sole structure 1 (hereinafter referred to as “wearer”) is indicated by a symbol F, and the middle foot of the wearer's foot The position corresponding to the part is indicated by the symbol M, and the position corresponding to the rear foot of the wearer's foot is indicated by the symbol H.

(Outsole)
As shown in FIGS. 1 to 3, the sole structure 1 includes an outsole 2. The outsole 2 is disposed corresponding to a range from the front foot F to the rear foot H of the wearer's foot.

  The outsole 2 is formed of a hard elastic member having a higher hardness than a midsole 3 described later. Specifically, the material of the outsole 2 is, for example, a thermoplastic resin such as ethylene-vinyl acetate copolymer (EVA), a thermosetting resin such as polyurethane (PU), or a rubber material such as butadiene rubber or chloroprene rubber. Is suitable.

  The hardness of the outsole 2 is preferably set to, for example, 50A to 80A (more preferably 60A to 70A) on the Asker A scale.

(Midsole)
As shown in FIGS. 1 to 3, the sole structure 1 includes a midsole 3. The midsole 3 is configured to support the underside of the wearer's foot. The midsole 3 is stacked on the outsole 2 by, for example, an adhesive. The upper surface of the midsole 3 is configured as a sole support surface 3a for supporting the sole surface of the wearer. In the shoe provided with the sole structure 1, an upper (not shown) for covering the wearer's foot is provided on the periphery of the midsole 3.

  The midsole 3 is formed of a soft elastic material having lower rigidity than the outsole 2. Specifically, the material of the midsole 3 is, for example, a thermoplastic synthetic resin such as ethylene-vinyl acetate copolymer (EVA) or its foam, a thermosetting resin such as polyurethane (PU) or its foam, butadiene. Rubber materials such as rubber and chloroprene rubber and foams thereof are suitable.

  The hardness of the midsole 3 is preferably set to 15C to 65C (specifically, 55C) on the Asker C scale.

  As shown in FIGS. 4 and 7, the midsole 3 has a housing portion 3b for housing a buffer body 20 described later. The accommodating portions 3b are arranged corresponding to a range from the middle foot portion M to the rear foot portion H of the wearer's foot. The accommodation portion 3b is formed in a concave shape downward from the sole support surface 3a of the midsole 3.

(plate)
As shown in FIG. 1, the sole structure 1 includes a plate 4. The plate 4 is arranged at least at a position corresponding to the forefoot F and the middle foot M of the wearer's foot. Specifically, the plate 4 in this embodiment is arranged in a range from the front foot F to the rear foot H of the wearer's foot. As shown in FIGS. 3 to 7, the plate 4 is disposed between the outsole 2 and the midsole 3.

  As shown in FIGS. 1 and 8, the plate 4 has a plate body 5.

  The plate body 5 is formed of a material that is less likely to expand than the outsole 2. Specifically, the plate body 5 is preferably formed of a material having higher rigidity than the outsole 2.

  As a material of the plate main body 5, a resin material or a rubber material having a higher hardness than the outsole 2 or a tape material made of a fabric is suitable. In this embodiment, an example in which a resin material having high hardness is used as the material of the plate body 5 is illustrated.

  The hardness of the plate 4 is preferably set to a Shore D hardness of, for example, 40D to 80D (specifically, 70D).

  As shown in FIGS. 3 to 7, the plate body 5 is formed in a thin shape having a smaller thickness than the midsole 3. It is preferable that the plate body 5 is formed in a thin shape having a thickness smaller than the maximum thickness of the outsole 2. Specifically, it is preferable that the plate main body 5 is formed to have a thickness of, for example, 0.5 to 2.0 mm. More specifically, the plate main body 5 is preferably formed to have a thickness of, for example, 1.5.

  Here, FIGS. 3 and 4 show the neutral axis A as a virtual line segment (dashed line) extending along the foot length direction. The neutral axis A corresponds to an axis when the sole structure 1 is bent and deformed so as to expand downward in a side view. When the sole structure 1 is bent and deformed, the amount of deformation of the portion below the neutral axis A is relatively larger than the amount of deformation of the portion above the neutral axis A. On the other hand, the plate body 5 made of a material having higher rigidity than the outsole 2 is disposed below the neutral axis A and above the outsole 2. The plate body 5 suppresses deformation of a portion below the neutral axis A. As a result, excessive bending of the sole structure 1 can be suppressed as a whole.

  The plate body 5 has an inner-side branch part 6 and an outer-side branch part 7 whose rear part branches into the inner and outer shell sides, respectively. The inner back branch 6 and the outer back branch 7 are arranged corresponding to a range from the middle foot M to the rear foot H of the wearer's foot.

  As shown in FIGS. 1 and 8, the plate main body 5 includes protrusions 8. The protruding portions 8, 8 are arranged at positions corresponding to the midfoot M of the wearer's foot. The protruding portions 8, 8 extend along the foot length direction. As shown in FIGS. 6 and 7, the protruding portions 8, 8 protrude upward from the respective peripheral portions of the inner side and the outer side of the plate body 5.

(First opening)
As shown in FIGS. 1 and 2, the plate 4 has at least one first opening 11. In this embodiment, the plate 4 has a plurality (three in the illustrated example) of first openings 11, 11,.

  Each first opening 11 is formed so as to vertically penetrate a part of the plate body 5. Each first opening 11 is formed such that the length in the foot length direction is longer than the length in the foot width direction. Each first opening 11 is formed such that the opening area is larger than the opening area of each third opening 13 described later.

  As shown in FIGS. 2 and 4 to 6, each first opening 11 is covered by the outsole 2 from below. A part of the lower part of the midsole 3 is embedded in each first opening 11. At the position of each first opening 11, a part of the lower part of the midsole 3 embedded in each first opening 11 is in close contact with a part of the upper surface of the outsole 2. This makes it easier for the pressure when the outsole 2 touches the ground or the road surface to escape from the outsole 2 toward the midsole 3 through the first openings 11.

  The first openings 11, 11,... Are arranged at intervals in the foot length direction. 8, the first openings 11, 11,... Are arranged at positions corresponding to the forefoot F and the middle foot M on the instep side of the wearer's foot.

  The first opening 11 located first from the front side of the plate body 5 includes, for example, the first distal phalanx DP1, the first proximal phalanx PP1, the second proximal phalanx IP2, and the second proximal phalanx of the wearer's foot. It is arranged so as to correspond to the position surrounded by the bone PP2.

  The first opening 11 located second from the front side of the plate body 5 is, for example, the proximal head of the first proximal phalanx PP1 and the first metatarsal MT1 near the metatarsophalangeal joint MP of the wearer's foot. And the distal head of the patient.

  The first opening 11 located third from the front side of the plate body 5 corresponds to, for example, a position between the first metatarsal bone MT1 and the second metatarsal bone MT2 in the metatarsal part M of the wearer's foot. It is arranged to be.

(Second opening)
As shown in FIGS. 1 and 2, the plate 4 has at least one second opening 12. In this embodiment, the plate 4 has one second opening 12.

  The second opening 12 is formed so as to penetrate a part of the plate body 5 in the up-down direction. The second opening 12 is formed such that the length in the foot length direction is longer than the length in the foot width direction. The second opening 12 is formed such that the opening area is larger than the opening area of a third opening 13 described later.

  As shown in FIGS. 2 and 6, the second opening 12 is covered by the outsole 2 from below. A part of the lower part of the midsole 3 is embedded in the second opening 12. At the position of the second opening 12, a part of the lower part of the midsole 3 embedded in the second opening 12 is in close contact with a part of the upper surface of the outsole 2. This makes it easier for the pressure when the outsole 2 touches the ground or the road surface to escape from the outsole 2 to the midsole 3 via the second opening 12.

  As shown in FIG. 8, the second opening 12 is arranged at a position mainly corresponding to the middle foot M on the outer back side of the wearer's foot. Specifically, the second opening 12 corresponds to, for example, a position between the third metatarsal bone MT3 and the fourth metatarsal bone MT4 behind the metatarsophalangeal joint MP of the wearer's foot. Are located in

(Third opening)
The plate 4 has at least one third opening 13. In this embodiment, the plate 4 has a plurality (three in the illustrated example) of third openings 13, 13,.

  Each third opening 13 is formed so as to penetrate a part of the plate body 5 in the up-down direction. Each third opening 13 is formed such that the length in the foot length direction is longer than the length in the foot width direction.

  As shown in FIGS. 2 and 5, each third opening 13 is covered by the outsole 2 from below. A part of the lower part of the midsole 3 is embedded in each of the third openings 13. At the position of each third opening 13, a part of the lower part of the midsole 3 embedded in each third opening 13 is in close contact with a part of the upper surface of the outsole 2. Thereby, the pressure when the outsole 2 touches the ground or the road surface easily escapes from the outsole 2 to the midsole 3 through each of the third openings 13.

  The third openings 13, 13, ... are arranged at intervals in the foot length direction and the foot width direction. As shown in FIG. 8, the third openings 13, 13,... Are arranged corresponding to positions including the forefoot F on the outer instep side of the wearer's foot.

  The third opening 13 located on the front side of the plate body 5 is arranged, for example, so as to correspond to a position including the third middle phalanx IP3 and the third base phalanx PP3 of the wearer's foot.

  The third opening 13 located near the center of the plate body 5 is arranged, for example, so as to correspond to a position between the second proximal phalanx PP2 and the third proximal phalanx PP3 of the wearer's foot. .

  The third opening portion 13 located on the outer side of the plate body 5 is disposed, for example, so as to correspond to a position between the fourth and fifth proximal phalanxes PP4 and PP5 of the wearer's foot. ing.

(Buffer)
As shown in FIGS. 1 and 3, the sole structure 1 includes a buffer 20. The buffer body 20 is configured to be able to absorb a vertical shock applied to the upper surface. With such a configuration, the shock absorber 20 can reduce the impact in the vertical and vertical directions particularly on the heel portion of the wearer's foot (the calcaneus HL shown in FIG. 8) at the time of touchdown.

  Examples of the material of the buffer 20 include a thermoplastic synthetic resin such as ethylene-vinyl acetate copolymer (EVA) or its foam, a thermosetting resin such as polyurethane (PU) or its foam, butadiene rubber, and chloroprene rubber. Rubber materials and foams thereof are suitable. The buffer 20 is preferably made of a soft elastic material having lower rigidity than the midsole 3. Specifically, the hardness of the buffer body 20 is preferably set to, for example, 40C on the Asker C scale.

  The buffer 20 is arranged at a position corresponding to the middle foot M and the rear foot H of the wearer's foot. Specifically, the buffer 20 is formed integrally with the midsole 3 by an adhesive or the like while being stored in the storage portion 3b of the midsole 3. Note that the buffer body 20 may be integrally formed with the midsole 3 while being stored in the storage portion 3b of the midsole 3.

  As shown in FIGS. 4 and 7, the buffer body 20 has inclined portions 22, 22,. The inclined portion 22 located on the front end portion 21 side of the buffer body 20 is formed such that the front end portion 21 is inclined rearward downward (see FIG. 4). In this embodiment, the inclined portions 22, 22,... Are formed so as to be continuous with each other all around the corner portion below the buffer body 20.

  As shown in FIG. 1, the buffer body 20 and the plate main body 5 vertically overlap each other at a position corresponding to the midfoot M of the wearer's foot.

  Specifically, as shown in FIG. 4, the front end 21 of the buffer 20 is arranged at a position corresponding to the middle foot M of the wearer's foot. The buffer body 20 is configured such that at least a part of the front end portion 21 vertically overlaps a part of the plate body 5.

  Further, as shown in FIG. 7, the buffer body 20 is configured such that a portion near the inner side overlaps with the inner side branch portion 6 of the plate body 5 in the vertical direction. Further, the buffer body 20 is configured such that a portion closer to the outer side is vertically overlapped with the inner side branch portion 6 of the plate body 5.

[Operation and Effect of Embodiment]
As described above, in the sole structure 1 according to the embodiment, at the position corresponding to the rear foot portion H of the wearer's foot, the buffer 20 disposed to face the back of the wearer's foot, particularly immediately after the touchdown. The impact force in the vertical and vertical directions at is appropriately absorbed. Thereby, the cushioning property at the time of ground contact is ensured.

  Further, at a position corresponding to the middle foot portion M of the wearer's foot, the buffer body 20 and the plate main body 5 are vertically overlapped with each other. With this configuration, in the position corresponding to the middle foot portion M of the wearer's foot, the vertical vertical impact force at the time of touchdown is appropriately absorbed by the shock absorber 20, and the plate body 5 causes the sole structure 1 to have an excessive force. Bending is suppressed. That is, at the position corresponding to the middle foot portion M of the wearer's foot, the cushioning property is ensured by the buffer body 20, and the wearer's foot can be stably supported by the plate body 5. And since the plate 4 is arrange | positioned at least in the position corresponding to the forefoot part F and the middle foot part M of a wearer's foot, the part of the outsole 2 corresponding to the said position is smoothly grounded to the ground or a road surface. It will be easier.

  Further, at a position corresponding to the forefoot portion F of the wearer's foot, the plate body 5 suppresses excessive bending of the sole structure 1. Then, when the outsole 2 touches the ground or the road surface, the stress accumulated in the plate body 5 is converted into energy for kicking forward. This facilitates kicking forward during traveling.

  Therefore, in the sole structure 1 according to the embodiment, it is possible to facilitate kicking forward during running, and to secure cushioning properties when touching the ground.

  The front end 21 of the buffer 20 is arranged at a position corresponding to the middle foot M of the wearer's foot. That is, the buffer 20 is not disposed at a position corresponding to the forefoot F of the wearer's foot. For this reason, in the position corresponding to the forefoot F of the wearer's foot, the plate body 5 suppresses the excessive bending of the sole structure 1 and facilitates forward kicking during traveling. Can be further enhanced.

  Further, the shock absorber 20 has an inclined portion 22 in which at least the front end portion 21 is inclined rearward downward. Due to the inclined portion 22, the cushioning property gradually decreases as the ground contact portion of the outsole 2 moves forward at a position corresponding to the middle foot portion M of the wearer's foot. For this reason, at the time of ground contact, it is possible to shift to a forward kicking operation while reducing the cushioning property of the buffer 20 so as not to cause a feeling of discomfort to the wearer's foot.

  Further, the plate body 5 formed of a material having higher rigidity than the outsole 2 further suppresses excessive bending of the sole structure 1. Therefore, the instantaneous power of kicking forward during traveling can be further increased.

  In addition, the protrusions 8, 8 can increase the rigidity of the plate body 5 at positions corresponding to the midfoot M of the wearer's foot on the inner and outer insteps. Therefore, the plate body 5 can more stably support the wearer's foot at the position corresponding to the middle foot M of the wearer's foot.

  Each first opening 11 (opening) of the plate 4 is formed so as to penetrate a part of the plate body 5 in the up-down direction. That is, the plate body 5 does not exist in each of the first openings 11. Each first opening 11 is covered by the outsole 2 from below. Therefore, the entire lower surface of the plate body 5 does not contact the upper surface of the outsole 2. Therefore, when the wearer kicks forward, even when the outsole 2 is sandwiched between the ground or the road surface and the plate 4, the pressure when the plate 4 touches the ground or the road surface However, it is easy to escape from the outsole 2 toward the midsole 3 through each of the first openings 11. Thereby, abrasion of the outsole 2 is suppressed. As a result, damage to the outsole 2 due to aging can be suppressed. It is to be noted that each of the second opening 12 and the third opening 13, 13,... Of the plate 4 can provide the same operation and effect as the first opening 11.

  Each of the first openings 11 is formed such that the length in the foot length direction is longer than the length in the foot width direction. This makes it possible to relatively increase the bending rigidity of the plate body 5 in the foot length direction. As a result, excessive bending of the sole structure 1 in the foot length direction is suppressed, and kicking forward during running becomes easier. It is to be noted that each of the second opening 12 and the third opening 13, 13,... Of the plate 4 can provide the same operation and effect as the first opening 11.

  And even the shoe provided with the sole structure 1 according to this embodiment can exert the above-mentioned effects.

[Modification 1 of Embodiment]
As in Modification Example 1 shown in FIG. 9, the buffer body 20 including the first and second sheet members 23 and 24 integrally formed in a laminated shape may be housed in the housing portion 3 b of the midsole 3. Each of the first and second sheet members 23 and 24 is made of, for example, foamed rubber or foam of thermoplastic resin or thermosetting resin. The hardness of each of the first and second sheet members 23 and 24 is preferably set to, for example, 20C on the Asker C scale.

  Further, the buffer body 20 shown in the first modification is formed in a stepped shape so that the front end portion 21 recedes backward as it goes downward. Specifically, the first sheet material 24 located on the upper side is configured such that the length in the foot length direction is smaller than the length of the second sheet material 25 located on the lower side in the foot length direction.

  As described above, in the first modification, the front end portion 21 of the buffer body 20 is formed in a step shape so as to retreat backward as it goes downward. For this reason, at a position corresponding to the middle foot portion M of the wearer's foot, the cushioning property gradually decreases as the ground contact portion of the outsole 2 moves forward. For this reason, at the time of ground contact, it is possible to shift to a forward kicking operation while reducing the cushioning property of the buffer 20 so as not to cause a feeling of discomfort to the wearer's foot.

[Modification 2 of Embodiment]
In the above-described embodiment, the form in which the buffer body 20 is accommodated in the accommodating portion 3b of the midsole 3 has been described, but the present invention is not limited to this form. For example, as in Modification Example 2 shown in FIG. 10, the entire rear portion of the midsole 3 may be replaced with the buffer 20 in a range from the middle foot portion M to the rear foot portion H of the wearer. The buffer 20 is formed integrally with the midsole 3 at, for example, the position of the front end 21.

  Even in such a modified example 2, the cushioning property at the time of contact with the ground is ensured by the buffer body 20 as in the above embodiment. Further, since the inclined portion 22 is formed even at the front end portion 21 of the buffer body 20 of the second modification, the same operation and effect as the above embodiment can be obtained.

[Other Embodiments]
In the above embodiment, the form in which the plate 4 is arranged in the range from the forefoot F to the hindfoot H of the wearer's foot is shown, but the present invention is not limited to this. That is, the plate 4 only needs to be arranged at least at a position corresponding to the forefoot F and the middle foot M of the wearer's foot.

  Further, in the above-described embodiment, the mode in which the plurality of first openings 11, 11,... Are provided has been described, but the present invention is not limited to this mode. For example, a mode in which only one first opening 11 is provided may be adopted.

  Further, in the above embodiment, the form in which the second opening 12 and the third openings 13, 13,... Are provided, but the present invention is not limited to this form. That is, the second opening 12 and the third opening 13 may not be provided.

  Further, in the above embodiment, the form in which the length in the foot length direction in each of the first openings 11 is formed to be longer than the length in the foot width direction has been described, but the present invention is not limited to this form. For example, each first opening 11 may be formed in a square shape or a substantially circular shape such that the length in the foot length direction is substantially equal to the length in the foot width direction. Similarly, the second opening 12 and the third openings 13 may be formed in a square shape or a substantially circular shape such that the length in the foot length direction is substantially equal to the length in the foot width direction. .

  Further, in the above-described embodiment, the form in which the protruding portions 8, 8 are provided on the inner periphery side and the outer periphery side of the plate body 5 is shown, but the present invention is not limited to this form. For example, at least one protruding portion 8 may be provided on one of the inner edge and the outer edge of the plate body 5. Alternatively, the protruding portions 8, 8 may not be provided on the inner periphery and the outer periphery of the plate body 5.

  The embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the invention.

  INDUSTRIAL APPLICABILITY The present invention can be industrially used, for example, as a sole structure for shoes applied to running or various sports and shoes using the same.

1: Sole structure 2: Outsole 3: Midsole 3a: Sole support surface 3b: Housing part 4: Plate 5: Plate body 6: Inner instep branch 7: Outer instep branch 8: Projection 11 to 13 : First to third openings (openings)
20: buffer 21: front end 22: inclined portion 23: first sheet material 24: second sheet material

Claims (9)

A sole structure for shoes,
Outsole and
A midsole formed of an elastic material having a lower rigidity than the outsole and stacked above the outsole;
A plate disposed at a position corresponding to at least a forefoot part and a middle foot part of a wearer's foot, and laminated and disposed between the outsole and the midsole;
At least at a position corresponding to the middle foot portion and the rear foot portion of the wearer's foot, arranged to face the back surface of the wearer's foot, and a shock absorber capable of absorbing vertical vertical impact applied to the upper surface,
The plate has a plate body that is formed of a material that is less stretchable than the outsole and has a thinner thickness than the midsole,
The sole structure, wherein the buffer body and the plate main body are vertically overlapped with each other at a position corresponding to a middle foot of a wearer's foot. The sole structure according to claim 1,
A sole structure, wherein a front end of the cushioning member is arranged at a position corresponding to a middle foot of a wearer's foot. The sole structure according to claim 2,
The sole structure, wherein at least the front end portion of the buffer has an inclined portion inclined rearward downward. The sole structure according to claim 2,
The sole structure, wherein the buffer body is formed in a stepped shape so that the front end portion moves backward toward the rear as the front end portion moves downward. The sole structure according to any one of claims 1 to 3,
The sole structure, wherein the plate body is formed of a material having higher rigidity than the outsole. The sole structure according to any one of claims 1 to 5,
The plate body includes a protruding portion protruding upward from a peripheral portion of at least one of the inner side and the outer side,
The sole structure, wherein the protrusion is disposed at least at a position corresponding to a middle foot of a wearer's foot. The sole structure according to any one of claims 1 to 6,
The plate has at least one opening formed to vertically penetrate a part of the plate body,
The sole structure, wherein the opening is covered from below by the outsole. The sole structure according to claim 7,
The sole structure, wherein the opening is formed such that a length in a foot length direction is longer than a length in a foot width direction. A shoe comprising the sole structure according to any one of claims 1 to 8.

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