JP2021053250A - Sole structure of shoe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To absorb an impact force at the time of landing and improve running comfort during running. SOLUTION: In a sole structure Sk, an outsole Os which is arranged on the lower surface of a sole body S1 and S2 composed of a corrugated structure S1 and a midsole S2 cooperating with the corrugated structure S1 and a sole body S1 and S2 and has a ground contact surface. , Os'are provided. The corrugated structure S1 has a plurality of waveform extending portions 10, 11 and 12 extending in a wavy shape in the foot length direction and juxtaposed in the foot width direction, and the corrugated extending portions 10, 11 and 12 in the foot width direction. It is composed of a connecting portion 15 connected to the foot, and the thickness center surface Occ of the corrugated structure S1 extends while being curved in the vertical direction in the foot length direction. The midsole S2 is composed of a soft elastic member, has a contact surface S2b1 to which the corrugated structure S1 abuts on the lower surface S2b, and has an upper surface S2a to which the upper U of the shoe Sp is attached. [Selection diagram] Fig. 7

Description

The present invention relates to a shoe sole structure, and more particularly to a shoe having a corrugated structure including a plurality of corrugated extending portions.

As the sole structure of the sports shoe, FIGS. 27 and 28 of Japanese Patent No. 333771 describe a structure in which the cushioning structure is housed in a recess formed in the heel portion of the midsole of the sports shoe. The buffer structure is composed of a plurality of strip-shaped corrugated sheets extending in the foot length direction and juxtaposed in the foot width direction, and a connecting portion for connecting the strip-shaped corrugated sheets adjacent to each other in the foot width direction. The impact force sometimes received from the road surface is absorbed by the compressive deformation of the strip-shaped corrugated sheet of the buffer structure and the torsional deformation of the connecting portion (see paragraphs [0056], [0057], etc.).

The above-mentioned Japanese Patent No. 333771 simply describes a configuration in which the buffer structure is simply housed in the recess of the heel of the shoe for the purpose of absorbing the impact force at the time of landing, and the running comfort during running is described. There is no description from the viewpoint of improvement.

The present invention has been made in view of such conventional circumstances, and the problem to be solved by the present invention is the sole structure of a shoe having a corrugated structure including a plurality of corrugated extending portions at the time of landing. The purpose is not only to be able to absorb the impact force of the vehicle, but also to improve the driving comfort while driving.

According to the present invention, in a sole structure provided in any of the heel region, the midfoot region, and the forefoot region of a shoe, the sole structure is a first impact absorbing element and a second impact absorbing element that cooperates with the first impact absorbing element. It is provided with a sole body made of, and an outsole provided on the lower surface of the sole body and having a ground contact surface. The first shock absorbing element has a plurality of corrugated extending portions extending in a wavy shape in the foot length direction and juxtaposed in the foot width direction, and a connecting portion connecting each corrugated extending portion in the foot width direction. It is composed of a corrugated structure, and the thickness center surface of the corrugated structure extends in the vertical direction while being curved in the foot length direction. The second shock absorbing element is composed of a soft elastic member, has a contact surface to which the corrugated structure abuts, and has a mounting surface to which the upper of the shoe is attached.

In the sole structure according to the present invention, the first shock absorbing element constituting the sole body has a plurality of corrugated extending portions extending in a wavy direction in the foot length direction and a connecting portion connecting the corrugated extending portions in the foot width direction. It is composed of a corrugated structure, and the thickness center surface of the corrugated structure extends in the vertical direction while being curved in the foot length direction. Further, the second impact absorbing element constituting the sole body is composed of a soft elastic member.

According to the present invention, at the time of landing of a shoe, the impact force at the time of landing can be absorbed by the elastic deformation of the second shock absorbing element made of a soft elastic member, and the corrugated extending portion of the first shock absorbing element is compressed. Improvement of shock absorption and high resilience can be obtained by deformation, torsional deformation of the connecting portion, and restoration thereof. Moreover, according to the present invention, since the thickness center surface of the corrugated structure extends while being curved in the vertical direction toward the foot length direction, the load during traveling can be smoothly moved forward. This makes it possible to improve the running comfort during running. On the other hand, in the cushioning structure in the conventional sole structure, the thickness center surface of the corrugated structure extends linearly in the foot length direction, and therefore, even if it is excellent in shock absorption, it is running. It could not be said that sufficient consideration was given to the load transfer of.

For example, for runners who perform midfoot strikes, the first and second impact absorbing elements are placed in the midfoot area of the shoe, and for runners who perform forefoot strikes, the forefoot area of the shoe. By arranging the first and second shock absorbing elements in the runner, the shock absorption and the running comfort can be effectively improved according to the running characteristics of the runner.

In the present invention, at least a part of the corrugated structure is fixed to the second impact absorbing element, and the first impact absorbing element and the second impact absorbing element made of the corrugated structure are integrated into the sole body. Consists of. As a result, the first and second shock absorbing elements cooperate as one during landing and load transfer during traveling, so that the load between the first shock absorbing element and the second shock absorbing element is carried out. Propagation is smooth.

In the present invention, at least a part of the corrugated structure is adhered to the lower surface of the second shock absorbing element, so that at least a part of the corrugated structure is fixed to the second shock absorbing element.

In the present invention, since at least a part of the corrugated structure is embedded inside the second shock absorbing element, at least a part of the corrugated structure is fixed to the second shock absorbing element.

In the present invention, the second impact buffering element is composed of a foamed bead-like soft foam material, and the corrugated structure is embedded inside the second impact absorbing element, so that at least the corrugated structure is formed. A part is fixed to the second shock absorbing element.

In the present invention, the outermost corrugated extending portion in the foot width direction of the plurality of corrugated extending portions of the corrugated structure is provided with a winding portion extending upward.

In this case, the hoisting portion can support the second impact absorbing element from the foot width direction, thereby preventing lateral swing of the foot and stably supporting the foot. it can. Further, by providing the winding portion, the fixing surface (for example, the adhesive surface) to the second impact absorbing element can be increased, and the strength of the entire sole structure can be improved.

In the present invention, the corrugated structure extends from the heel region of the shoe through the midfoot region to the forefoot region, and the thickness center plane of the corrugated structure is located below the thickness center plane of the sole body in the forefoot region. At the front end of the heel region, it is located above the center surface of the thickness of the sole body, and at the rear end of the heel region, it is located below the center surface of the thickness of the sole body.

In this case, the thickness center surface of the corrugated structure is located above the thickness center surface of the sole body at the front end of the heel region and below the thickness center surface of the sole body at the rear end of the heel region. As a result, the thickness center surface of the corrugated structure is inclined diagonally upward toward the front in the region from the rear end of the heel region to the front end of the heel region. Therefore, at the time of heel landing, the impact load acting diagonally forward from the heel of the foot toward the lower sole acts on the obliquely upward inclined portion of the corrugated structure at the front end of the heel region. As a result, the impact load at the time of landing on the heel can be reliably received by the corrugated structure at the front end of the heel region, and as a result, the impact absorption can be improved.

Further, since the thickness center surface of the corrugated structure is located below the thickness center surface of the sole body in the forefoot region and above the thickness center surface of the sole body at the front end of the heel region, the corrugated structure is formed. The thickness central surface of the body is inclined diagonally downward toward the front in the forefoot region. As a result, the flexion rigidity of the corrugated structure can be increased in the forefoot region, and energy loss during running can be reduced.

In the present invention, of the plurality of waveform extension portions of the waveform structure, at least two waveform extension portions adjacent to each other in the foot width direction are integrated into one waveform extension portion in any portion in the foot length direction. It constitutes a part. As a result, the bending rigidity can be increased in the foot width direction of the corrugated structure, and the landing stability and the running stability can be enhanced.

In the present invention, a plurality of corrugated structures are provided in the foot width direction or the foot length direction. In this case, independent corrugated structures can be placed between the medial and lateral insteps of the foot, or between the anterior and posterior sides of the foot so that they perform independent functions. As a result, more detailed shock absorption control and running comfort control can be performed.

In the present invention, the corrugated extending portion and the connecting portion of the corrugated structure are integrally molded from the same material. In this case, the corrugated structure can be easily formed.

In the present invention, the corrugated structure is made of a material having a higher rigidity than the second shock absorbing element. In this case, the relatively low-rigidity second shock-absorbing element ensures cushioning at the time of landing, while the relatively high-rigidity first shock-absorbing element improves the shock-absorbing property at the time of landing. At the same time, a large propulsive force can be obtained due to its high repulsive force.

In the present invention, the corrugated extending portion of the corrugated structure is composed of a strip-shaped corrugated sheet or a linear corrugated wire. In any of these cases, the foot contact property of the wearer with respect to the sole of the foot is ensured by the second shock absorbing element made of a soft elastic member.

As described above, according to the sole structure of the shoe according to the present invention, the first impact absorbing element constituting the sole body has a plurality of corrugated extending portions extending in a wavy direction in the foot length direction, and the foot width direction. It is composed of a corrugated structure having a connecting portion connected to the foot, and the thickness center surface of the corrugated structure extends while being curved in the vertical direction toward the foot length direction, and a second impact absorbing element constituting the sole body is formed. Since it is composed of a soft elastic member, when the shoe lands, the impact force at the time of landing can be absorbed by the elastic deformation of the second impact absorbing element made of the soft elastic member, and the waveform of the first impact absorbing element is extended. Impact absorption can be improved and high resilience can be obtained by compressive deformation of the portion, torsional deformation of the connecting portion, and restoration thereof. Moreover, according to the present invention, since the thickness center surface of the corrugated structure extends while being curved in the vertical direction toward the foot length direction, the load during traveling can be smoothly moved forward. This makes it possible to improve the running comfort during running.

It is a schematic of the outer instep side side surface of the shoe (for the left foot) provided with the sole structure according to the first embodiment of the present invention. It is a partially enlarged view (heel area enlarged view) of FIG. It is a schematic bottom view of the shoe (FIG. 1). It is a partially enlarged view (heel area enlarged view) of FIG. It is an overall perspective view of the corrugated structure which constitutes the sole structure (FIG. 1). It is a side view of the outer shell side of the corrugated structure (FIG. 5). It is an exploded view of the shoe (FIG. 1). It is an overall perspective view of the bottom surface side of the mid sole which constitutes the sole structure (FIG. 1). FIG. 5 is a sectional view taken along line IX-IX of FIG. It is a schematic of the outer instep side side surface of the shoe (for the left foot) provided with the sole structure according to the second embodiment of the present invention. It is an overall perspective view of the bottom surface side of the mid sole which constitutes the sole structure (FIG. 10). FIG. 10 is a sectional view taken along line XII-XII of FIG. It is a schematic of the outer instep side side surface of the shoe (for the left foot) provided with the sole structure according to the third embodiment of the present invention. It is an overall perspective view of the bottom surface side of the mid sole which constitutes the sole structure (FIG. 13). It is a schematic of the outer instep side side surface of the shoe (for the left foot) provided with the sole structure according to the 4th embodiment of the present invention. It is a schematic bottom view of the shoe (FIG. 15). It is an exploded view of the shoe (FIG. 15). It is an overall perspective view of the corrugated structure which constitutes the sole structure (FIG. 15). It is a bottom view of the corrugated structure (FIG. 18). It is a side view of the outer shell side of the corrugated structure (FIG. 18). FIG. 15 is a schematic cross-sectional view of the shoe (FIG. 15) in the front-rear direction. FIG. 15 is a sectional view taken along line XXII-XXII of FIG. It is a schematic of the outer instep side side surface of the shoe (for the left foot) provided with the sole structure according to the fifth embodiment of the present invention. It is a schematic bottom view of the shoe (FIG. 23). FIG. 2 is a schematic cross-sectional view of the shoe (FIG. 23) in the front-rear direction. FIG. 2 is a cross-sectional view taken along the line XXVI-XXVI of FIG. It is a schematic of the outer instep side side surface of the shoe (for the left foot) provided with the sole structure according to the sixth embodiment of the present invention. It is a schematic bottom view of the shoe (FIG. 27). FIG. 7 is a schematic cross-sectional view of the shoe (FIG. 27) in the front-rear direction. It is sectional drawing of XXX-XXX line of FIG. 27. It is a schematic of the outer shell side side surface of the corrugated structure constituting the sole structure according to the 7th Example of this invention. It is a schematic diagram of the outer instep side side surface of the corrugated structure constituting the sole structure according to the eighth embodiment of the present invention, and is the figure which shows together with the mid sole which constitutes the sole structure. FIG. 5 is a schematic view of the outer instep side of a shoe (for the left foot) having a sole structure according to a ninth embodiment of the present invention. It is a schematic bottom view of the shoe (FIG. 33). It is an exploded view of the shoe (FIG. 33). It is an overall perspective view of the corrugated structure which constitutes the sole structure (FIG. 33). It is a bottom view of the corrugated structure (FIG. 36). It is a side view of the outer shell side of the corrugated structure (FIG. 36). FIG. 5 is an exploded view of a sole structure according to a tenth embodiment of the present invention. It is a schematic view of the outer shell side side surface of the fuse (for the left foot) provided with the sole structure according to the eleventh embodiment of the present invention. It is a schematic bottom view of the shoe (FIG. 40). It is an exploded view of the shoe (FIG. 40). It is an overall perspective view of the corrugated structure which constitutes the sole structure (FIG. 40), and the bottom surface side of a midsole. It is an overall perspective view of the upper surface side of the corrugated structure (FIG. 43). It is a bottom view of the corrugated structure (FIG. 43). It is a side view of the outer shell side of the corrugated structure (FIG. 44). FIG. 6 is a schematic cross-sectional view of the shoe (FIG. 40) in the front-rear direction. FIG. 4 is a sectional view taken along line XLVIII-XLVIII of FIG.

[First Example]
Hereinafter, the first embodiment of the present invention will be described with reference to the accompanying drawings.
1 to 9 are views for explaining a shoe sole structure according to the first embodiment of the present invention. Here, running shoes are taken as an example of shoes. In the following description, upper (upper / upper) and lower (lower / lower) represent the vertical positional relationship of the shoes, and front (front / front) and rear (rear / rear) are used. , The positional relationship of the shoes in the front-rear direction (foot length direction) is shown, and the width direction refers to the left-right direction (foot width direction) of the shoes. That is, the upper and lower directions refer to the upper and lower parts of the figure, respectively, and the front and the rear points to the left and right sides of the same figure, respectively, in the width direction. , Pointing to the vertical direction of the paper in the figure. Further, in each figure, H indicates the heel area of the shoe, M indicates the midfoot area, and F indicates the forefoot area, and these areas are the heel part, the midfoot part, and the forefoot part of the wearer's foot. Corresponds to each.

As shown in FIGS. 1 to 4, the shoe Sp includes a sole structure Sk and an upper U provided on the sole structure Sk. Sole assembly Sk is fart the metatarsal region M from the heel region H of the shoe Sp forefoot region F midsole S ₂ which extends up to the _(second shock-absorbing element), shoes in the lower midsole S _{2 Sole bodies S 1} and S _{2 composed of a corrugated structure S 1} (first shock absorbing element) arranged mainly in the heel region H (that is, a part of the heel region H and the midfoot region M) of Sp. It is provided on the lower surfaces of the sole bodies S ₁ and S ₂ , and includes out soles Os and Os'that have a ground contact surface that comes into contact with the road surface.

As shown in FIGS. 5 and 6, a plurality of corrugated structures S ₁ extend in a wavy shape in the foot length direction (horizontal direction in FIG. 6) and are arranged side by side in the foot width direction (vertical direction on the same drawing) (here). 3) Wave extension portions 10, 11 and 12 and a plurality of connecting portions 15 for connecting the waveform extension portions 10, 11 and 12 adjacent to each other in the foot width direction in the foot width direction. ..

Each of the corrugated extending portions 10, 11 and 12 is a thin corrugated sheet extending in a strip shape. In this example, the waveform extension portions 10 and 12 on both sides in the foot width direction have the same wave shape, their respective wavelengths and amplitudes are equal, and the waveform extension portions 10 and 12 overlap when viewed from the side. ing. The waveform extending portion 11 at the center in the foot width direction has a wave shape different from the wave shapes of the waveform extending portions 10 and 12 on both sides in the foot width direction, and has a wave shape different from that of the waveform extending portions 10 and 12 in the foot width direction. Are different in amplitude and phase, but have the same wavelength. The phase of the wave shape of the waveform extending portion 11 is deviated by π with respect to the phase of the wave shape of the waveform extending portions 10 and 12. In FIG. 6, reference numerals 11A and 11B indicate a wave-shaped peak portion (upper convex portion) and valley portion (lower convex portion) of the waveform extending portion 11, respectively, and reference numerals 12A (10A) and 12B (12B). Reference numeral 10B) indicates a wave-shaped peak portion (upper convex portion) and valley portion (lower convex portion) of each waveform extending portion 12 (10), respectively.

In this way, by shifting the phase between the waveform extending portions 10 and 12 adjacent to each other in the foot width direction and the waveform extending portion 11 by π, the waveforms of the waveform extending portions 10, 11 and 12 are above each of the wave shapes. The convex portion and each downward convex portion can be evenly dispersed in the heel region H of the shoe Sp. As a result, the landing stability can be improved, and the local load on the sole of the wearer's foot can be reduced to reduce the feeling of pushing up at the time of landing. Further, in this case, since each connecting portion 15 can effectively exert torsional rigidity between the corrugated extending portions 10, 11 and 12 adjacent to each other in the foot width direction, the shock absorption can be improved.

As shown in FIG. 6, each connecting portion 15 is, for example, a bar having a circular cross-sectional shape (any other horizontal surface shape can be adopted), and the corrugated extending portions 10, 11 when viewed from the side surface direction. At the points where the wave shapes of 12 intersect with each other, the waveform extending portions 10 and 11 adjacent to each other in the foot width direction and the waveform extending portions 11 and 12 are connected to each other. In this example, as shown in FIG. 5, each connecting portion 15 passes not only between the waveform extending portions 10, 11 and 12 but also on the surfaces of the waveform extending portions 10, 11 and 12. It extends in the entire width direction. Further, on the front end side of the corrugated structure S _1, the waveform extending portions 10, 11 and 12 are connected to each other by the connecting portion 15, and _{the rear end side of the corrugated structure S 1} is connected by the connecting plate 16. Waveform extension portions 10, 11 and 12 are connected to each other.

As shown in dashed line in FIG. 6, the thickness center plane of the wave structure S ₁ (i.e., the surface passes through the center in the thickness direction) Oc extends while curving in the vertical direction toward the foot length direction, The front end side has an upwardly convex curved shape, and the foot length direction has a downwardly convex curved shape from the central side to the rear end side.

The corrugated structure S ₁ is made of, for example, a thermoplastic resin such as a thermoplastic polyurethane (TPU), a polyamide elastomer (PAE), Pevacs (registered trademark), a BS resin, or an epoxy resin or an unsaturated polyester resin. It is composed of a thermosetting resin. Further, a fiber reinforced plastic (CFRP / AFRP / GFRP) in which a thermosetting resin or a thermoplastic resin is used as a matrix resin and carbon fibers, aramid fibers, glass fibers and the like are used as reinforcing fibers may be used. The corrugated structure S ₁ is manufactured from injection molding, press molding, 3D printing, or the like. The corrugated structure S ₁ is preferably made of a material having a higher rigidity than the _{midsole S 2 described later.} Each waveform extending portions 10, 11, 12 of the waveform structure S _1, connection 15 and connection plate 16, for ease of molding, preferably are integrally molded of the same material.

As shown in FIGS. 7 and 9, the midsole S _{2 has a top surface (mounting surface) S 2} a to which the bottom U a of the upper U is suspended and fixed with an adhesive or the like, and a corrugated structure S _1. and a lower surface _{S 2} b in contact. As shown in FIG. 8, a plurality of concave curved surfaces S ₂ b ₁ extending in the foot width direction are formed on the lower surface S ₂ b of the midsole S ₂ , and these concave curved surfaces S 2 b 1 are formed on the concave curved surfaces S ₂ b ₁ . each wave-like upper convex portion 10A of the wave structure _{S 1} of the waveform extending portions 10, 11, 12, 11A, at least the upper portion of 12A has a complementary shape capable of fitting in surface contact. The upward convex portions 10A, 11A, and 12A of the corrugated extending portions 10, 11 and 12 of the corrugated structure S ₁ correspond to the corresponding concave curved surfaces (contact surfaces) S of the lower surface S _{2 b of the midsole S 2. It is in contact with 2} b ₁ and fitted, and is fixed to _{each concave curved surface S 2} b ₁ with an adhesive or the like. In this case, the connecting plate 16 is also fixed by an adhesive or the like to the lower surface S _{2 b} midsole S _2. As a result, the corrugated structure S ₁ and the midsole S ₂ are integrated to form the sole main body S ₁ and S _2, and both cooperate with each other when a load is applied.

In this case, only the upper portion of the waveform structure S ₁ is being secured to the midsole S _2, the lower portion of the waveform structure S _1, as shown in FIGS. 1 and 2, exposed to the lower midsole S ₂ ing.

The midsole S ₂ is composed of a soft elastic member, and specifically, a thermoplastic synthetic resin such as ethylene-vinyl acetate copolymer (EVA), a foam thereof, and a thermosetting resin such as polyurethane (PU). Or its foam, or a rubber material such as butadiene rubber or chloroprene rubber or its foam.

Outsole Os are as shown in FIGS. 3, 4 and 7, is constituted by a plurality of rectangular plate which is curved in the vertical direction, as shown in FIG. 2, the waveform extended waveform structure S ₁ The downwardly convex portions 10B, 11B, 12B of the portions 10, 11 and 12 are arranged along the lower surface of the connecting plate 16 and are fixed by adhesion or the like. Outsole Os', as shown in FIG. 1, is fixed by an adhesive or the like to the lower surface of the midsole S ₂ in the forefoot region F of the shoe Sp.

Outsole Os, Os', rather than the midsole S ₂ is composed of an elastic member of rigid, in particular, and a Soriddoraba or thermosetting polyurethanes, and the like.

Next, the action and effect of this example will be described.
The landing of the shoe Sp, by elastic deformation of the soft elastic member made of the midsole S _2, it is possible to absorb the impact force of landing, the wave shape of each waveform extending portions 10, 11, 12 of the waveform structure S ₁ The shock absorption can be improved and high resilience can be obtained by the compressive deformation of the portion, the torsional deformation of the connecting portion 15 accompanying this, and the restoration thereof. At this time, the waveform extending portions 10, 11, 12 of the waveform structure S ₁ is, each connecting portion 15 at the front and rear end side thereof, are connected to each other by coupling plates 16, at the time of action of the load, the waveform extending Since the elongation of the installation portions 10, 11 and 12 is regulated by the connecting portion 15 and the connecting plate 16 on the front and rear end sides, the shock absorption and the resilience can be further improved.

Moreover, in this case, the thickness center plane Oc of the waveform structure S ₁ is extends while curving in the vertical direction toward the foot length direction, the curved shape of the convex lower toward the rear end side from the center side of the heel region H It has an upwardly convex curved shape on the front end side. When an impact load at the center of the heel region H is applied at the time of landing is, by having a downward convex shape in the region of the heel center side heel rear end, the entire waveform structure S ₁ is downward Since it sinks while curving, it is possible to improve cushioning while contributing to improvement of shock absorption. Further, when the load shifts from the heel region H to the midfoot region M, the upper convex shape on the front end side of the heel exerts a shank effect of suppressing excessive subduction of the midfoot region M. Therefore, the load can be smoothly transferred from the midfoot region M to the forefoot region F, which can improve the running comfort during running.

In this case, a part of the waveform structure S ₁ is being secured to the midsole S _2, waveform structure S ₁ and midsole S ₂ is to constitute a sole body S _1, S ₂ together There is. Thus, when the load movement during landing and during traveling, since the waveform structure S ₁ and midsole S ₂ cooperate together, the propagation of the load between the waveform structure S ₁ and midsole S ₂ Is done smoothly.

Furthermore, in this case, since the waveform structure S ₁ is composed of a rigid material than the midsole S _2, while ensuring the cushioning of landing by the relatively low stiffness midsole S _2, relative high the rigidity waveform structure S ₁ of, it is possible to improve the impact absorption property at the time of landing, resilience can be improved.

Incidentally, with respect to the runner to perform the midfoot Hashiho, the waveform structure S ₁ disposed in midfoot region M of the shoe Sp, for the runner to perform forefoot Hashiho, the forefoot region F of the shoe Sp By arranging the corrugated structure S ₁ , the shock absorption and the running comfort can be effectively improved according to the running characteristics of the runner. Further, according to such a habit of driving characteristics and shoe wearer's Discipline, waveform structure S ₁ may be arranged in the region of the heel region H and the midfoot region M of the shoe Sp, or shoes It may be arranged in the forefoot region F and the midfoot region M of Sp.

In the present embodiment, the midsole _{S 2} on the lower surface _{S 2} b, each wave-shaped upper convex portion 10A of the wave structure _{S 1} of the waveform extending portions 10, 11, 12, 11A, 12A of the While the upper surface shows an example in which the concave curved surface _S 2 _{b 1} is formed to fit in surface contact, not the upper convex portions 10A, 11A, 12A only, the lower convex portion 10B, 11B, 12B the top surface of Also, a concave curved surface may be formed so as to be in contact with the surface and fitted. In this case, the entire upper surface of the wave structure S ₁ is being bonded in surface contact with the midsole S _2.

[Second Example]
10 to 12 show a sole structure for shoes (running shoes) according to a second embodiment of the present invention. In each figure, the same reference numerals as those in the first embodiment indicate the same or corresponding parts.

The second embodiment is different from the first embodiment, as shown in FIGS. 10 to 12, a pair of right and left projecting portions S protruding downward in the inner and outer upper side edge of the midsole S _{2 This} is the point where 2h is formed. In this example, each overhanging portion S ₂ h is provided mainly in the central portion of the heel region H, as shown in FIGS. 10 and 11.

By providing such an overhanging portion S ₂ h, the corrugated structure S ₁ can be easily positioned in the left-right direction when the corrugated structure S ₁ is incorporated into the midsole S _2. Further, since the longitudinal central portion of the waveform structure S ₁ after assembling as well be covered from the side, can restrict the movement of the side of the waveform structure S ₁ at the time of loading, improve landing stability it can.

[Third Example]
13 and 14 show a shoe (running shoe) sole structure according to a third embodiment of the present invention. In each figure, the same reference numerals as those of the first and second embodiments indicate the same or corresponding parts.

In the third embodiment, the extending portion S _{2 h} 'overhanging lower midsole S ₂ is, in the region of the over the metatarsal region M from the heel region H of the inner and outer upper side edge of the midsole S ₂ It is provided throughout and also on the side edge of the heel area. That is, in the third embodiment, the extending portion S _{2 h} 'is in the region of the over the metatarsal region M from the heel region H, the entire heel region H along the outer peripheral edge of the midsole S ₂ and midfoot region It is arranged so as to surround a part of M, and the midsole S ₂ is formed with a cavity-shaped accommodating portion for accommodating the corrugated structure S _1.

By providing such projecting part S _{2 h} ', becomes the waveform structure S ₁ in the left-right direction and further facilitates longitudinal positioning of the waveform structure S ₁ when incorporated into midsole S _2, after assembling the entire length of the waveform structure S ₁ not only can cover from the side, since the movement to the side of the waveform structure S ₁ at the time of loading can be more reliably restricted, can be further improved landing stability.

[Fourth Example]
15 to 22 show a sole structure for shoes (running shoes) according to a fourth embodiment of the present invention. In each figure, the same reference numerals as those of the first to third embodiments indicate the same or corresponding parts.

In the fourth embodiment, midsole, and upper midsole S ₂ arranged on the upper side of the sole assembly Sk, composed point from the lower midsole S _{2 'arranged} on the lower side, the corrugations A point where the body S ₁ extends from the heel region H of the shoe Sp through the midfoot region M to the forefoot region F, and _{a part of the corrugated structure S 1} is embedded in the upper and lower midsole S ₂ and S _2'. is in and that is, and in that the outsole Os, Os 'is lower midsole S _2' is provided on the lower surface of is different from the first embodiment.

As shown in FIGS. 15 to 17 and 21 are extended to the forefoot region F the upper and lower midsole S _2, S 2 _'is fart the metatarsal region M from the heel region H of both shoes Sp, and the lower surface S _{2 b} of the upper midsole S _2, between the a _'top surface S ₂ of the' lower midsole S _2, a plurality of cushion holes Ch extending the foot width direction is formed. Waveform structure S ₁ is sandwiched from above and below by the upper and lower midsole S _2, S _{2 '.} As shown in FIGS. 17 and 22, on the lower surface _{S 2} b of the upper midsole _{S 2,} the abutment surface _S 2 _{b 1} of the waveform structure _{S 1} is abuts, is formed on the lower surface _{S 2} b groove provided within, Similarly, a _'top surface S ₂ of the' lower midsole S _2, 'is a _1, the upper surface S _2' abutting surface S ₂ of the waveform structure S ₁ is in contact formed on a It is provided in the recessed groove. That is, in this case, part of the waveform structure S ₁ is embedded in the upper and lower midsole S _2, S _{2 '.} Waveform structure _{S 1} is fixed by bonding or the like to _{a 1} 'abutting surface _{S 2} of the' upper midsole abutment surface _S 2 _{b 1} and a lower midsole _{S 2} of _{S 2.}

As shown in FIGS. 18 to 20, the waveform structure S ₁ are each Ashicho direction (FIG. 19, FIG. 20 left and right directions) to extend in a wave shape and the foot width direction (FIG. 19 vertical and 20 direction perpendicular to the page) A plurality of (five in this case) waveform extending portions 10 and 10'arranged in parallel and a plurality of connecting portions 15 connecting each waveform extending portion 10 and 10'adjacent in the foot width direction in the foot width direction. And have.

Each corrugated extending portion 10, 10'is a thin corrugated sheet extending in a strip shape. In this example, the waveform extending portions 10 on both outer sides and the center in the foot width direction have the same wave shape, their respective wavelengths and amplitudes are equal, and the waveform extending portions 10 overlap when viewed from the side. ing. Similarly, the waveform extension portions 10'one inside from both outer sides in the foot width direction have the same wave shape, their respective wavelengths and amplitudes are the same, and each waveform extension portion 10 when viewed from the side. Are overlapping. The wave shapes of the waveform extending portions 10 and 10'are different, and the amplitudes and phases are different from each other, but the wavelengths are the same. The phase of the wave shape of the waveform extending portion 10'is deviated by π from the phase of the wave shape of the waveform extending portion 10. In FIG. 20, reference numerals 10A and 10'A indicate wave-shaped peaks (upper convex portions) of the waveform extension portions 10 and 10', respectively, and reference numerals 10B and 10'B are waveform extension portions, respectively. A wavy valley portion (downward convex portion) of 10 and 10'is shown.

In this example, each connecting portion 15 is composed of a thin plate-shaped portion having the same wall thickness as each corrugated extending portion 10 and 10', as shown in FIGS. 18 to 20. When the wave shapes of the waveform extending portions 10 and 10'are intersected with each other when viewed from the side surface direction, the waveform extending portions 10 and 10'are connected to each other.

As shown in dashed line in FIG. 20, the thickness center plane Oc of the waveform structure S ₁ extends while curving in the vertical direction toward the foot length direction, the curved shape of protruding downward at the heel region H The midfoot region M has an upwardly convex curved shape, and the forefoot region F has a downwardly convex curved shape.

Next, the action and effect of this example will be described.
The landing of the shoe Sp, soft elastic member made of the midsole S _2, S 2 _'by elastic deformation of, it is possible to absorb the impact force of landing, of the wave structure S ₁ each waveform extending portion 10, 10' of the The shock absorption can be improved by the compression deformation of each wave-shaped portion and the torsional deformation of the connecting portion 15 accompanying this. At this time, 'and front and rear end side of the are connected to each other by a connecting portion 15, when the action of the load, the waveform extending portion 10, 10' each waveform extending portions 10, 10 of the waveform structure S ₁ is elongation Since it is regulated by the connecting portion 15 on the front and rear end sides, shock absorption and resilience can be further improved.

Moreover, in this case, the thickness center plane Oc of the waveform structure S ₁ is extends while curving in the vertical direction toward the foot length direction, has a convex curved shape under the heel region H, the metatarsal region M Has an upwardly convex curved shape, and the forefoot region F has a downwardly convex curved shape. When an impact load acts on the central portion of the heel region H at landing, by having a downward convex shape in the heel region H, the whole waveform structure S ₁ is sink while curving downward, impact Cushioning can be improved while contributing to the improvement of absorbency. Further, when the load shifts from the heel region H to the midfoot region M, the midfoot region M has an upward convex shape, so that a shank effect for suppressing excessive subduction of the midfoot region M can be obtained. Since it is exerted, the load can be smoothly transferred from the midfoot region M to the forefoot region F, which can improve the running comfort during running. Further, when the load is transferred to the forefoot region F, the sole flexibility in the forefoot region F can be improved by having a downward convex shape in the forefoot region F, thereby improving the running comfort during running. Can be improved.

In this case, a part of the waveform structure S ₁ is _'is fixed to the waveform structure S ₁ and midsole S _2, S _2' midsole S _2, S 2 sole body S together form _It constitutes 1, S ₂ , and S ₂ '. Thus, when the load movement during landing and during traveling, since the waveform structure S ₁ and midsole S _2, S 2 _'cooperate together, waveform structure S ₁ and midsole S _2, S ₂ The load propagates smoothly between'.

[Fifth Example]
23 to 26 show a sole structure for shoes (running shoes) according to a fifth embodiment of the present invention. In each figure, the same reference numerals as those of the first to fourth embodiments indicate the same or corresponding parts.

Internal In the fifth embodiment, as shown in FIG. 23, 25 and 26, a portion of the waveform structure S ₁ (specifically, the convex portion on the wave shape) of the midsole S ₂ It is buried in. The corrugated structure S ₁ is insert-molded at the time of molding the _{midsole S 2} , for example.

In this case, when the corrugated structure S ₁ is fixed to the midsole S ₂ , the bonding work becomes unnecessary, and a part of the _{corrugated structure S 1} is embedded and fixed inside the _{mid sole S 2.} it is, it is possible to more firmly fix the waveform structure S1 with respect to the midsole S _2, thereby improving the overall strength of the sole assembly Sk.

[Sixth Example]
27 to 30 show a sole structure for shoes (running shoes) according to a sixth embodiment of the present invention. In each figure, the same reference numerals as those of the first to fifth embodiments indicate the same or corresponding parts.

In the sixth embodiment, FIG. 27, as shown in FIGS. 29 and 30, the entire waveform structure S ₁ is embedded in the midsole S _2. The corrugated structure S ₁ is insert-molded at the time of molding the _{midsole S 2} , for example. In this case, for example, put the waveform structure S ₁ in a mold of the midsole S ₂ with beaded expanded particle (e.g. E-TPU), by heat sealing with steam or the like foamed particle surface, Mid The sole S ₂ is composed of the soft foam material of the bead aggregate, the surface of the corrugated structure S ₁ is covered with the bead-shaped soft foam material, and the bead-shaped soft foam material penetrates into the inside of the _{corrugated structure S 1.} be to, it may be allowed to bury the waveform structure S ₁ inside the bead-like soft foam. Incidentally, beaded soft foam may be to be adhered via an adhesive layer to the surface of the corrugated structure body S _1.

In this case, when the corrugated structure S ₁ is fixed to the midsole S ₂ , the bonding work becomes unnecessary, and the _{entire corrugated structure S 1} is embedded and fixed inside the mid sole S _2. , can be more firmly fixed waveform structure S ₁ with respect to the midsole S _2.

[7th Example]
FIG. 31 shows a corrugated structure constituting the sole structure according to the seventh embodiment of the present invention. In the figure, the same reference numerals as those of the first to sixth embodiments indicate the same or corresponding parts. FIG. 31 shows a modification of FIG. 20 of the fourth embodiment.

In the seventh embodiment, among the waveform plurality of waveforms extending portions 10, 10 of the structure S ₁ 'shown in FIG. 20, the outermost of the waveform extending portion 10 of the foot width direction, extends upward up portion 10Ah is provided.

In this case, the winding portion 10Ah _{can support the midsole S 2} from the foot width direction, thereby preventing lateral swing of the foot and stably supporting the foot. .. Further, by providing the winding portion 10Ah _{, the adhesion surface (for example, the adhesive surface) to the d sole S 2} can be increased, and the strength of the entire sole structure Sk can be improved.

[8th Example]
FIG. 32 shows a corrugated structure constituting the sole structure according to the eighth embodiment of the present invention. In the figure, the same reference numerals as those of the first to seventh embodiments indicate the same or corresponding parts. FIG. 32 shows another modification of FIG. 20 of the fourth embodiment.

In this eighth embodiment, the corrugated structure S ₁ extends from the heel region H of the shoe through the midfoot region M to the forefoot region F, and the _{entire corrugated structure S 1} is inside the midsole S _2. It is buried in. The thickness center surface Occ of the corrugated structure S ₁ is located below the thickness center surface S _{2 c of the sole bodies S 1} and S _{2 in} the forefoot region F, and the sole is located at the front end of the heel region H. body _S 1, located from _{S 2} of the thickness center plane _{S 2} c upwards, in the rear portion of the heel region H, positioned below the sole body _S 1, _{S 2} of the thickness center plane _{S 2} c ing.

In this case, positioned above the sole body S _1, the thickness center plane of the S ₂ S _{2 c} in the thickness center plane Oc of the waveform structure S ₁ is the front part of the heel region H, the rear end of the heel region H Since the sole bodies S ₁ and S ₂ are located below the thickness center surface S ₂ c, the thickness center surface Occ of the corrugated structure S ₁ is from the rear end of the heel region H to the front end of the heel region H. In the area extending to the portion, it is inclined diagonally upward toward the front. Therefore, when the heel landing, the impact load F acting obliquely forward from the heel of the foot towards the lower sole is generally perpendicular to the obliquely upward inclined portion of the waveform structure S ₁ at the front end portion of the heel region H Acts to do. Thereby, the impact load at the time of the heel landing can be received reliably by the waveform structure S ₁ of the front end of the heel region H, as a result, it is possible to improve the shock absorption.

The thickness center plane Oc of the waveform structure S ₁ is located below the sole body S _1, the thickness center plane of the S ₂ S _{2 c} in the forefoot region F, the sole body S ₁ at the front part of the heel region H , S ₂ is located above the thickness center surface S ₂ c, so that the thickness center surface Occ of the corrugated structure S ₁ is inclined diagonally downward toward the front in the forefoot region F. This increases the bending rigidity of the corrugated structure body S ₁ in the forefoot region F, as a result, it is possible to reduce the energy loss during travel.

[9th Example]
33 to 38 show a sole structure for shoes (running shoes) according to a ninth embodiment of the present invention. In each figure, the same reference numerals as those of the first to eighth embodiments indicate the same or corresponding parts.

In the ninth embodiment, as shown in FIGS. 33 to 35, whereas the upper midsole S ₂ is extended to the forefoot region F and f the metatarsal region M from the heel region H of the shoe Sp , lower midsole S _{2 'are} arranged in the region of over the metatarsal region M from the heel region H of the shoe Sp. The corrugated structure S ₁ extends from the heel region H of the shoe Sp through the midfoot region M to the forefoot region F. Outsole Os, in the heel region H of the shoe Sp _'are disposed on the lower surface of the outsole Os' lower midsole S ₂ is disposed on the lower surface of the corrugated structure body S ₁ in the forefoot region F.

As shown in FIGS. 36 to 38, the corrugated structure S ₁ extends in a wavy shape in the foot length direction (FIG. 37 and FIG. 38 left and right direction) and in the foot width direction (FIG. 37 vertical direction and FIG. 38 vertical direction on paper). Multiple (five here) waveform extension parts 10 ₁ , 10 ₂ , 10 ₃ , 10', and each waveform extension part 10 ₁ , 10 ₂ , 10 ₃ , adjacent to each other in the foot width direction. It has a plurality of connecting portions 15 for connecting 10'in the foot width direction. The waveform extension portions 10'are arranged on both the left and right outer sides of _{the waveform structure S 1 , and the waveform extension portions 10 1} , 10 ₂ , 10 ₃ are the waveform extension portions 10'on both the left and right sides. It is placed in between.

Each corrugated extending portion 10 ₁ , 10 ₂ , 10 ₃ , 10'is a thin corrugated sheet extending in a strip shape, respectively. Waveform extending portion 10 ', 10 ₂ of the wave-shaped phase is shifted by π with respect to the waveform extending portions ₁₀ 1, 10 ₃ of the waveform-shaped phase. In FIG. 38, reference numeral 10A indicates _{a wave-shaped peak portion (upper convex portion) of the waveform extension portions 10 1} , 10 ₃ , and reference numeral 10'A is a wave of the waveform extension portions 10 ₂ , 10'. The mountain part (upper convex part) of the shape is shown. Reference numeral 10B indicates a wave-shaped valley portion (downward convex portion) of the waveform extension portions 10 ₁ , 10 ₃ , and reference numeral 10'B is a wave-shaped valley _{portion of the waveform extension portions 10 2, 10'.} The part (downward convex part) is shown.

Of the corrugated structure S1, each waveform extending portion 10'on both the left and right sides and each waveform extending portion 10 ₁ , 10 _{3 inside the corrugated structure S 1 have} a midfoot region starting from the heel rear end of the heel region H of the shoe Sp. has been extended to forefoot region F and F the M, the waveform extending portion 10 ₂ of the center, the heel region H not arranged, forefoot region F of the front end portion of the metatarsal region M as starting Has been extended to.

_{The corrugated extending portions 10', 10 1} adjacent to each other in the left-right direction on the outer instep side are separated from the forefoot portion F to the front end portion of the heel region H via a slit e, but the heel region H In the region from the front end portion to the rear end portion of the heel, the waveform extension portions 10'and 10 ₁ are integrated to form one waveform extension portion 10 ". Similarly, they are adjacent to each other in the left-right direction on the inner instep side. Each of the matching waveform extension portions 10', 10 ₃ is provided separately from the forefoot portion F to the front end portion of the heel region H via a slit e, but extends from the front end portion of the heel region H to the rear end of the heel. In the region of, the waveform extension portions 10'and 10 ₃ are integrated to form one waveform extension portion 10 ".

Each waveform extending portion 10'on both the left and right sides is provided with a pair of left and right winding portions 10'Ah extending upward. Each connecting portion 15, 1 each waveform extending portion ₁₀ as viewed from the side, 10 ₃ and ₁₀ 2, 10 each waveform extending portion ₁₀ 1 in the point where the waveform shaped cross each other _', 10 2, ₁₀ 3, The 10's are connected to each other.

According to this embodiment, the waveform extending portions 10', 10 ₁ or 10', and 10 ₃ adjacent to each other in the left-right direction are integrated into one in the region from the front end portion to the heel rear end portion of the heel region H. by forming a waveform extending portion 10 ', in the paw width direction of the waveform structure S ₁ can be enhanced bending stiffness, it becomes possible to enhance the landing stability and running stability. in addition, integrated The waveform extending portion to be formed is not limited to the one arranged on the inner and outer instep sides, and may be the one located at the center in the left-right direction. Further, the number of integrated waveform extending portions may be three or more. Further, two. The position where the above-mentioned waveform extension portion is integrated may be any portion in the foot length direction.

According to this embodiment, by winding portion 10'Ah provided to the waveform extending portion 10 ', it is possible to support the midsole S ₂ from the foot width direction, lateral Thus, the side of the leg It can prevent runout and support the foot stably. Further, by providing the winding portion 10'Ah, the _{adhesion surface (for example, the adhesive surface) to the d sole S 2} can be increased, and the strength of the entire sole structure Sk can be improved.

[10th Example]
FIG. 39 shows a sole structure for shoes (running shoes) according to a tenth embodiment of the present invention. In each figure, the same reference numerals as those of the first to ninth embodiments indicate the same or corresponding parts.

In this tenth embodiment, as shown in FIG. 39, the corrugated structure is composed of _{two corrugated structures S 1} and S _1'. Each waveform structure S _1, S 1 _'are provided separately from each other in the foot width direction, it is disposed adjacent to the foot width direction. The waveform structure S ₁ is composed of a plurality of waveform extension portions 10, 10'that are out of phase by π (two in this example), and each waveform extension portion 10, 10'is connected by a connection portion 15. Has been done. Similarly, the waveform structure S ₂ is composed of a plurality of waveform extension portions 10, 10'that are out of phase by π (two in this example), and each waveform extension portion 10, 10'is a connecting portion. It is connected by 15.

In this case, between the medial side and the outer lateral side of the foot, can be adapted to exhibit independent functions by placing a waveform structure S _1, S 1 _'independent of each other, thereby, It will be possible to control the shock absorption and the running comfort more finely. The two or more corrugated structures may be separated in the foot length direction (for example, in the midfoot region M). In this case, between the legs of the front and rear, it can be adapted to exhibit independent function arranged mutually independent waveforms structure S _1, S 1 _', thereby, a more finely It will be possible to control shock absorption and driving comfort. Further, the corrugated structure separated in the foot width direction or / or the foot length direction may be composed of three or more corrugated structures.

[11th Example]
40 to 48 show the sole structure for shoes (running shoes) according to the eleventh embodiment of the present invention. In each figure, the same reference numerals as those of the first to tenth embodiments indicate the same or corresponding parts.

In the first to tenth embodiments, although each waveform extending portion of the waveform structure S ₁ is constituted of a strip-shaped corrugated sheet, in this eleventh embodiment, the waveform structure S ₁ is linear It is composed of corrugated wires.

As shown in FIGS. 40 and 42, the midsole S ₂ extends from the heel region H of the shoe Sp through the midfoot region M to the forefoot region F. As shown in FIG. 43, the lower surface of the midsole S _2, cavity-like receiving portion for receiving the waveform structure S ₁ S _{2 B} are formed. The accommodating portion S _{2 B is surrounded by a peripheral wall portion S 2} h ”arranged along the outer peripheral edge portion of the _{midsole S 2} in the entire heel region H and a part of the midfoot region M. part S on the lower surface S _{2 b} of the midsole S ₂ in the _{2 B,} a plurality of engaging grooves part of the portion of the wave-shaped mountain waveform structure S ₁ (the upper convex portion) is engaged S ₂ b 1 _'is formed. Thus, as shown in FIGS. 47 and 48, a portion of the top of the waveform structure S ₁ are embedded in the midsole S _2, each engaging with an adhesive or the like groove S portion of the _{2 b} 1 _'is secured to. waveform structure S ₁ of the waveform-shaped valley portions (lower convex portion), as shown in FIG. 40, the lower midsole S ₂ It is exposed.

As shown in FIG. 44 to FIG. 46, a waveform structure S ₁ is in each Ashicho direction extending in a wave shape (FIG. 45, 46 left-right direction) and the foot width direction (FIG. 45 vertical and 46 direction perpendicular to the page) A plurality of connecting portions 15 ₁ to 15 connecting a plurality of (nine in this case) waveform extending portions 10 ₁ to ₉ arranged side by side and each waveform extending portion 10 ₁ to 10 _{9 adjacent to each other in the foot width direction. It has 8} and 15'.

Each of the corrugated extending portions 10 ₁ to 10 ₉ is a corrugated wire extending linearly. In this example, the waveform extension portions 10 ₁ , 10 ₃ , 10 ₅ , 10 ₇ , 10 ₉ have the same wave shape, have the same wavelength and amplitude, and extend each waveform when viewed from the side. Parts 10 ₁ , 10, ₃ , 10 ₅ , 10, ₇ , and 10 ₉ overlap (see FIG. 46). The waveform extension portions 10 ₂ , 10 ₄ , 10, ₆ and 10 ₈ arranged between the _{waveform extension portions 10 1} , 10 ₃ , 10 ₅ , 10 ₇ and 10 ₉ have the same wave shape. The wavelengths and amplitudes of the respective waveforms are the same, and the waveform extension portions 10 ₂ , 10 ₄ , 10 ₆ and 10 ₈ overlap each other when viewed from the side (see FIG. 46), but the waveform extension portions 10 ₂ , 10 ₄ and The phases of 10 ₆ , 10 ₈ are deviated by π with respect to the phases of the waveform extension portions 10 ₁ , 10 ₃ , 10 ₅ , 10, ₇ , and 10 _9. In Figure 46, reference numeral 10A denotes a portion of the waveform-shaped mountain waveform extending portions ₁₀ 1 to 10 ₉ (upper convex portion), reference numeral 10B is a waveform extending portion ₁₀ 1 to 10 ₉ wavy of The valley part (downward convex part) is shown. The corrugated structure S ₁ is preferably made of a material that is more rigid than the _{midsole S 2.}

As shown in FIG. 44, on the front end side of the waveform structure _{S 1,} connection ₁₅ 1-15 ₈ is provided for connecting the each front edge of the waveform extending portions ₁₀ 1 to 10 ₉ to each other. Connection 15 ₁ is connected to the front end of the waveform extending portions ₁₀ 1, 10 _2, connecting section 15 ₂ is connected to the front end of the waveform extending portions ₁₀ 2, 10 _3, connecting portion 15 ₃ is a waveform extended connecting the respective front end parts ₁₀ 3, 10 _4, connection 15 ₄ is connected to the front end of the waveform extending portion ₁₀ 4, 10 _5, connection 15 ₅ each of the waveform extending portion ₁₀ 5, 10 ₆ connecting the front connecting portion 15 ₇ connecting each front end of the waveform extending portions _{107, 108,} connecting portion 15 ₈ is linked to the front end of the waveform extending portion ₁₀ 8, 10 _9. Connection ₁₅ 1-15 ₈ extends in a direction intersecting obliquely with respect to the foot width direction. _On the rear end side of the waveform structure S 1, a connecting portion 15'that connects the rear ends of the waveform extending portions 10 ₁ to 10 ₉ to each other is provided. Between the front and rear ends of the waveform structure S ₁ , there is no connecting portion for connecting the _{waveform extending portions 10 1} to 10 _9. Connection ₁₅ 1-15 ₈ and 15 'is composed of the same wire as the waveform extending portion ₁₀ 1 to 10 _9. Waveform extending portion ₁₀ 1 to 10 ₉ and the connecting portion _{15 1-15} 8, 15 ', in this example, has a circular cross section, the cross-sectional shape may be other shapes in a rectangular shape.

As shown in dashed line in FIG. 46, the thickness center plane of the wave structure S ₁ (i.e., the surface passes through the center in the thickness direction) Oc extends while curving in the vertical direction toward the foot length direction, The front end side has an upwardly convex curved shape, and the foot length direction has a downwardly convex curved shape from the central side to the rear end side.

As shown in FIG. 41, the outsole Os is fixed to the lower surface of the corrugated valley portion (lower convex portion) 10B of each corrugated extending portion 10 ₁ to 10 ₉ of the corrugated structure S _{1 by adhesion or the like.} Has been done. The outsole Os is a half-split semi-cylindrical member wound around the lower outer circumference of the lower convex portion 10B, and is fixed to the lower outer circumference of the lower convex portion 10B by adhesion or the like.

Next, the action and effect of this example will be described.
When the shoes Sp land, _{the elastic deformation of the midsole S 2} made of a soft elastic member can absorb the impact force at the time of landing, and each wave shape of each corrugated extending portion 10 ₁ to 10 _{9 of the corrugated structure S 1.} the deformation and restore the coupling portion 15 _{1-15 8} with compression deformation and to parts, can be improved shock absorption, and it is possible to obtain a high resilience. In this case, front and rear end side, each connection _{15 1-15} 8 for each waveform of the waveform structure _{S 1} extending portion ₁₀ 1 to 10 _9, 15 are connected to each other at 'the time action of the load, the waveform extending since elongation of the portion ₁₀ 1 to 10 ₉ is restricted by the front and rear connecting portions ₁₅ 1 _{to 15} 8, 15 of end side ', shock absorption and resilience can be further improved.

Moreover, in this case, the thickness center plane Oc of the waveform structure S ₁ is extends while curving in the vertical direction toward the foot length direction, the curved shape of the convex lower toward the rear end side from the center side of the heel region H It has an upwardly convex curved shape on the front end side. When an impact load at the center of the heel region H is applied at the time of landing is, by having a downward convex shape in the region of the heel center side heel rear end, the entire waveform structure S ₁ is downward Since it sinks while curving, it is possible to improve cushioning while contributing to improvement of shock absorption. Further, when the load shifts from the heel region H to the midfoot region M, the upper convex shape on the front end side of the heel exerts a shank effect of suppressing excessive subduction of the midfoot region M. Therefore, the load can be smoothly transferred from the midfoot region M to the forefoot region F, which can improve the running comfort during running.

In this case, a part of the waveform structure S ₁ is being secured to the midsole S _2, waveform structure S ₁ and midsole S ₂ is to constitute a sole body S _1, S ₂ together There is. Thus, when the load movement during landing and during traveling, since the waveform structure S ₁ and midsole S ₂ cooperate together, the propagation of the load between the waveform structure S ₁ and midsole S ₂ Is done smoothly.

Furthermore, in this case, since the waveform structure S ₁ is composed of a rigid material than the midsole S _2, while ensuring the cushioning of landing by the relatively low stiffness midsole S _2, relative in the waveform structure S ₁ of high rigidity, it is possible to improve the impact absorption of landing, thereby improving the running stability.

In this embodiment, an example of forming a cavity shaped housing portion S _{2 B} for receiving a waveform structure S ₁ to the lower surface of the midsole S _2, application of the present invention is not limited thereto .. A part or all of the corrugated structure S ₁ may be embedded inside the _{midsole S 2} by insert molding or foam molding using bead-shaped foam particles.

Although examples suitable for the present invention have been described above, the application of the present invention is not limited to this, and the present invention includes various modifications. Some examples of modifications are given below.

<First modification>
Waveform structures each waveform extending portion of the waveform shape S ₁ is not limited to those above described in each Example. Any shape such as a sine wave shape, a trapezoidal wave shape, and a triangular wave shape can be adopted, and different wave shapes may be combined. Further, the amplitude, wavelength, and phase of the wave shape of the waveform extending portion may be the same or different. Further, the width, thickness, and diameter of the waveform extension portion may be the same or different in each waveform extension portion, and the thickness and diameter may be changed in the same waveform extension portion (for example, thickening or thickening in the heel region). You can do it.

<Second modification>
Each coupling portion of the waveform structure S ₁ may not have the same cross-sectional shape and size. Further, the distance between the connecting portions in the foot length direction may be the same or different.

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

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

As described above, the present invention is useful for the sole structure of shoes for absorbing the impact force at the time of landing and improving the running comfort during running.

Sp: Shoes

Sk: Sole structure (sole structure)

S ₁ , S ₂ : Sole body

S ₁ : Corrugated structure (first shock absorbing element)
10, 11, 12: Waveform extension part 10Ah: Winding part 15: Connecting part Occ: Thickness center surface

S ₂ : Mid sole (second shock absorbing element)
S ₂ a: Top surface (mounting surface)
S ₂ b: Bottom surface S ₂ b ₁ : Contact surface

Os, Os': Outsole

H; Heel area M: Midfoot area F; Forefoot area

U: Upper

Japanese Patent No. 333771 (see paragraphs [0056], [0057], etc., and FIGS. 27 and 28).

Claims (11)

A sole structure provided in any of the heel area, midfoot area, or forefoot area of the shoe.
The sole structure includes a sole body composed of a first shock absorbing element and a second shock absorbing element that cooperates with the first shock absorbing element, and an outsole provided on the lower surface of the sole body and having a ground contact surface.
A plurality of waveform extending portions in which the first impact buffering elements extend in a wavy shape in the foot length direction and are arranged side by side in the foot width direction, and a connecting portion connecting the respective waveform extending portions in the foot width direction. It is composed of a corrugated structure having the above, and the thickness central surface of the corrugated structure extends in the vertical direction while being curved in the foot length direction.
The second shock absorbing element is composed of a soft elastic member, has a contact surface to which the corrugated structure abuts, and has a mounting surface to which a shoe upper is mounted.
The sole structure of the shoe is characterized by that. In claim 1,
At least a part of the corrugated structure is fixed to the second impact absorbing element, and the first impact absorbing element and the second impact absorbing element made of the corrugated structure are integrated into the sole. Makes up the main body,
The sole structure of the shoe is characterized by that. In claim 2,
At least a part of the corrugated structure is adhered to the lower surface of the second shock absorbing element.
The sole structure of the shoe is characterized by that. In claim 2,
At least a part of the corrugated structure is embedded inside the second shock absorbing element.
The sole structure of the shoe is characterized by that. In claim 2,
The second shock-cushioning element is made of a foamed bead-like soft foaming material, and the corrugated structure is embedded inside the second shock-cushioning element.
The sole structure of the shoe is characterized by that. In any of claims 1 to 5,
Of the plurality of corrugated extending portions of the corrugated structure, the outermost corrugated extending portion in the foot width direction is provided with a winding portion extending upward.
The sole structure of the shoe is characterized by that. In any of claims 1 to 6,
The corrugated structure extends from the heel region of the shoe through the midfoot region to the forefoot region, and the thickness center surface of the corrugated structure is located below the thickness center plane of the sole body in the forefoot region. At the front end of the heel region, it is located above the center surface of the thickness of the sole body, and at the rear end of the heel region, it is located below the center surface of the thickness of the sole body.
The sole structure of the shoe is characterized by that. In any of claims 1 to 7,
Of the plurality of waveform extension portions of the waveform structure, at least two waveform extension portions adjacent to each other in the foot width direction are integrally formed at any portion in the foot length direction to form one waveform extension portion. doing,
The sole structure of the shoe is characterized by that. In any of claims 1 to 8,
A plurality of the corrugated structures are provided in the foot width direction or the foot length direction.
The sole structure of the shoe is characterized by that. In any of claims 1 to 9,
The corrugated extending portion and the connecting portion of the corrugated structure are integrally molded from the same material.
The sole structure of the shoe is characterized by that. In any of claims 1 to 10,
The corrugated structure is made of a material that is more rigid than the second shock absorbing element.
The sole structure of the shoe is characterized by that.

Images