JP2011177206A - Shoes equipped with cushioning members - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide shoes with cushioning members enhancing cushioning function and repulsion function especially of heel parts while holding feet in a stable state even in the thin type shoes. <P>SOLUTION: In the shoes or the like having cushioning members including viscoelastic bodies (a) and corrugated plate body (b), the viscoelastic bodies (a) have a hardness of 5 to 250 in penetration (JIS K2207) or 0 to 40 in Asker hardness (C type), the corrugated plate body (b) has higher hardness than that of the viscoelastic body (a) and elasticity extending and deforming in a corrugate continuous direction, all or a part of the corrugated plate body (b) is buried in the viscoelastic body (a) toward corrugated shape mountain top part in a pressure receiving direction of the cushioning member when landing. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a shoe provided with a buffer member, and more particularly to a shoe provided with a buffer member having an improved buffer function of a heel portion.

In a wide range from sports shoes for athletes to walking shoes to business shoes, footwear, especially sports shoes, is lightweight and has a fit that keeps the foot stable and comfortable, and others In addition, it is required to have a high buffering function for absorbing and relaxing the impact of landing, and in particular, the pursuit of optimal shock absorption is required.
Especially for shoes for sports, walking, etc., a lot of research and development has been conducted in order to pursue optimal shock absorption according to the application. For example, a flexible material such as a gel material is incorporated into the sole portion to improve the buffer function and to reduce the burden on the foot when landing. This technical pursuit extends from the development of the material itself to the design of the shape of the cushioning member, based on the behavior of the user according to the purpose of the shoe and the actual analysis of the impact.

As a response to such a request, for example, the invention proposed by the present applicant exists as a prior art (see Patent Documents 1 to 5).
With these technologies, shoes that provide a high level of cushioning and can visually confirm the function are provided on the market.
However, the Applicant continues to try further improvements without being relieved by such high evaluation of the market. In particular, for example, the impact on the heel is not only a compressive load from above, but also focusing on the stability of the center of gravity due to the load and the inductivity to correct the load movement in the toe direction in the desired direction, and a structure suitable for it In order to investigate, I am trying hard development.

In other words, conventionally, a relatively large area of action, such as the heel and toe of a shoe, is taken. For example, in the heel, the main focus has been on buffering the landing impact directly under the heel, improving the impact buffering ability. In general, when pursuing cushioning performance, a cushioning member that is soft and excellent in damping properties is applied, so it is easy to receive pressure deformation because it is soft, so the center of gravity of the sole tends to be unstable, In addition, from the viewpoint of preventing bottoming during pressure deformation, a certain amount of thickness is required, the shoe sole is thick, the center of gravity of the user is high, and it is difficult to walk (run), the shoes are heavy, etc. There was an evil. On the other hand, in order to avoid the above-mentioned adverse effects, if the buffer member is hardened and the resilience function is enhanced, the buffering performance is impaired, and there is a contradictory relationship, and both the stability of the center of gravity at the time of landing and the shock buffering property are compatible. It was difficult.
In addition, children's shoes are reduced in size from shoes for adults in a similar manner, but since foot protection must be taken into consideration more than adults, in reality the midsole and the cushioning material that enters it are similar. As a result, the cushioning member must be made thicker than the overall height of the shoe, resulting in a high center of gravity, poor running stability, and a burden on the child's feet. Is seen as a problem compared to adults. On the other hand, from the viewpoint of designability, the degree of freedom of design is limited, and therefore, a buffer member that is thinner than the conventional one and can secure excellent buffering property and stability of the center of gravity has been desired.
Recently, in addition to various functions such as a buffering function, shoes having a repulsive function for enhancing the wearer's athletic ability have been proposed (see, for example, Patent Document 6). Because it depends on the thickness, it was still not possible to divert it to children's shoes.

JP 2006-288907 A JP 2008-061853 A JP 2007-319394 A JP 2007-222545 A JP 2009-022449 A International Publication No. WO2006 / 120749

  An object of the present invention is to provide a shoe provided with a cushioning member that has improved the cushioning function and the resilience function of the heel part while maintaining a stable foot even in a thin shape, in view of the above-mentioned problems of the prior art. It is in.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors consider the actual deformation of the shock-absorbing member in the heel portion of the shoe. The conventional shock-absorbing member is due to intensive deformation in the thickness direction of the pressure-receiving portion. It was found that the buffering action is dominant, and in particular, as the buffering member becomes more flexible and the buffering member becomes thinner, the pressure receiving part concentration type buffering action becomes more prominent. Then, if the parts other than the pressure receiving part are also deformed together with the pressure receiving part so that the entire buffer member exhibits a buffering action, it is conceived that the thickness can be reduced while taking advantage of the softness of the material. Focus on the sheath shape, and make a structure in which a corrugated body different from the viscoelastic material is embedded in a cushioning member made of a viscoelastic material such as low-hardness rubber or gel that is elastically deformable. Accordingly, the corrugated plate material existing on the inside of the buffer member at the time of pressure reception is used to move the viscoelastic material on the surface in contact with the corrugated plate member using the movement of extending in the lateral direction so that the wave shape gradually collapses. Along with the stretching of the body, the function of replacing not only the viscoelastic material but also the deformation from the inside into the shock absorption can be expressed, and the thickness deformation of the buffer member due to the presence of the corrugated plate body Appropriate tension can be added to So, as a result, the shock-absorbing action is exerted on the entire cushioning material, and as a conventional buffering function improvement, the cushioning material is not softened or thickened, and the thinness and center of gravity that are in a trade-off relationship are lowered and stable As a result, it has been found that the buffer function and the stability of the center of gravity are improved, and that the degree of freedom in design can be obtained. The present invention has been completed based on these findings.

  That is, according to the first invention of the present invention, the shoe includes a cushioning member made of a viscoelastic body (a) and a corrugated body (b), and the viscoelastic body (a) has a penetration ( JIS K2207) has a hardness of 5 to 250 or Asker hardness (C type) of 0 to 40, and the corrugated body (b) has a higher hardness than the viscoelastic body (a) and is stretched and deformed in the waveform continuous direction. A buffer member characterized in that it is embedded in the viscoelastic body (a) in the pressure receiving direction of the buffer member at the time of landing toward the corrugated peak. Shoes are provided.

According to the second invention of the present invention, in the first invention, the buffer member is deformed in conjunction with the deformation of the pressure receiving buffer portion (A) around the pressure receiving buffer portion (A) that receives pressure deformation. A substantially plate-like body or a substantially cylindrical body having an interlocking buffering portion (B) that passes through, and all or part of the corrugated plate body (b) penetrates the pressure receiving buffering portion (A) and the interlocking buffering portion (B). The wave plate body (b) extends from the pressure-receiving buffer portion (A) as a starting point in conjunction with the pressure-receiving deformation of the pressure-receiving buffer portion (A). The buffering action in which the interlocking buffer (B) is deformed in the direction of the stretching deformation by the deformation and the buffering action by the pressure receiving deformation of the viscoelastic body (a) in the direction in which the corrugated body (b) is not stretched and deformed are combined. A shoe is provided with a cushioning member characterized by movement.
Furthermore, according to the third invention of the present invention, in the first or second invention, the corrugated body (b) further has flexibility to bend and deform, and the viscoelastic body (a) There is provided a shoe provided with a cushioning member, characterized in that a corrugated plate curve inducing portion is provided on the landing side.

According to the fourth invention of the present invention, in any one of the first to third inventions, the viscoelastic body (a ) Or directly adjacent to it, there is provided a shoe with a cushioning member characterized by having a hollow portion.
Furthermore, according to the fifth invention of the present invention, in any one of the first to fourth inventions, the buffer member has an elongated shape, and the corrugated plate body (b) is the corrugated plate body (b). A shoe provided with a buffer member is provided, wherein the shoe is arranged so that the direction of stretching deformation follows the longitudinal direction of the buffer member.

According to a sixth invention of the present invention, in any one of the first to fifth inventions, the corrugated plate (b) is characterized in that the material is a resin and the waveform is a triangular wave or a chord wave. A shoe with a cushioning member is provided.
Furthermore, according to the seventh invention of the present invention, in any one of the first to sixth inventions, the corrugated plate body (b) has a compression spring constant according to JIS K6385 of 1 × 10 ³ to 1 × 10 ⁶ N. / M, and a ratio of a compression spring constant of the corrugated plate body to a compression spring constant of the viscoelastic body (a) is 0.1 to 10, and a shoe having a buffer member is provided. .

According to the eighth invention of the present invention, in any one of the first to seventh inventions, the corrugated body (b) is a cushioning member that is terminated so that the outsole side faces downward. Provided shoes are provided.
Furthermore, according to the ninth invention of the present invention, in any one of the first to seventh inventions, the corrugated plate (b) is terminated so that both ends face one side upward and the other side downward. A shoe with a featured cushioning member is provided.

According to a tenth invention of the present invention, in any one of the first to ninth inventions, the buffer member has a structure integrally formed with the second buffer via a connecting portion. A shoe including a cushioning member is provided.
Furthermore, according to an eleventh aspect of the present invention, in any one of the first to tenth aspects of the present invention, there is provided a cushioning member, wherein the cushioning member is arranged and incorporated in a midsole of a landing portion. Provided shoes are provided.

As described above, the present invention relates to a shoe provided with a buffer member composed of a viscoelastic body (a) and a corrugated body (b), and preferred embodiments include the following. .
(1) In the second invention, the wave plate (b) in the pressure receiving buffer (A) has a small amplitude and the wave plate (b) in the interlocking buffer (B) has a large amplitude. A shoe provided with members (see FIG. 10).
(2) In the second invention, the wave plate (b) in the pressure receiving buffer (A) has a large amplitude, and the wave plate (b) in the interlocking buffer (B) has a small amplitude. Shoes with members.
(3) In the second invention, the wave plate (b) in the pressure receiving buffer (A) has a large period, and the wave plate (b) in the interlocking buffer (B) has a small period. A shoe provided with members (see FIG. 11).
(4) In the second invention, the wave plate (b) in the pressure receiving buffer (A) has a small period and the wave plate (b) in the interlocking buffer (B) has a large period. Shoes with members.
(5) In the second invention, the corrugated plate body (b) is provided with a shock absorbing member characterized in that the stiffness (rigidity) on the outer side of the shoe is larger than the stiffness (rigidity) on the inner side of the shoe (see FIG. 12). ).
(6) In the second invention, the corrugated plate body (b) is characterized in that the peak lines of each wave are parallel or alternating up to ± 30 degrees (continuous of the C-shaped and reverse C-shaped). A shoe provided with a buffer member (see FIG. 13).
(7) In the second invention, the substantially plate-like body is a part of a ring shape (a part of a substantially fan shape), and the corrugated plate body (b) is also a part of a ring shape (a substantially fan shape). A shoe having a cushioning member (see FIG. 14), characterized in that the period is large on the outside and small on the inside.
(8) In the second invention, the corrugated plate (b) is a shoe provided with a buffer member (see FIG. 7), characterized in that the corrugated plate (b) is disposed at the center of the substantially plate-shaped body.
(9) In the second invention, the corrugated plate (b) is disposed on the lower side from the center inside the substantially plate-shaped body (see FIG. 16).
(10) In the second invention, the corrugated plate (b) is a shoe provided with a buffer member (see FIG. 16), characterized in that the corrugated plate (b) is disposed outside the shoe inside the substantially plate-like body.
(11) In the second invention, the corrugated plate body (b) has a shock-absorbing member that has a bending inducing portion that is easy to displace on either one of the long sides (see FIG. 17). .)

  In a shoe equipped with a buffer member of the present invention, a corrugated plate body (b) that is stretched / restored in response to pressure reception / decompression is embedded in a buffer member made of a viscoelastic body (a) such as low elastic rubber or gel. By doing so, even if the thickness is thin, the buffer function and the stability of the center of gravity are remarkably improved, and furthermore, both functions are compatible. According to the present invention, the center of gravity point at the time of landing on the heel is stabilized while distributing the stress to the entire buffer member to ensure high buffering property, especially against excessive deformation external force. Can provide shoes that can. Moreover, even if it is thin, the above-described excellent operational effects can be obtained, so that a child's shoe having the above-described operational effects can be provided. Furthermore, it contributes to the thinning of the shoe sole, which makes it possible to reduce the weight of the shoe and design various designs.

It is a perspective view explaining the shoes provided with the buffer member of the present invention. It is a top view explaining the bottom face of shoes provided with the buffer member of the present invention. It is a mimetic diagram explaining a buffer member concerning the present invention. It is a schematic diagram explaining another form of the buffer member which concerns on this invention. It is a mimetic diagram explaining a buffer member concerning the present invention. It is a mimetic diagram explaining the back of shoes provided with the buffer member of the present invention. It is a schematic diagram explaining the dispersion | distribution of the stress of the buffer member which concerns on this invention. It is a schematic diagram explaining 1 aspect of 1st or 2nd invention of this invention. It is a schematic diagram explaining 1 aspect of the 6th invention of this invention. It is a schematic diagram explaining another aspect (the 1) of this invention. It is a schematic diagram explaining another aspect (the 2) of this invention. It is a schematic diagram explaining another aspect (the 3) of this invention. It is a schematic diagram explaining another aspect (the 4) of this invention. It is a schematic diagram explaining another aspect (the 5) of this invention. It is a schematic diagram explaining 1 aspect of the 8th or 9th invention of this invention. It is a schematic diagram explaining another aspect (the 6) of this invention. It is a schematic diagram explaining another aspect (the 7) of this invention. It is a schematic diagram explaining the example of an aspect of the 4th invention of this invention. FIG. 5 is a schematic diagram for explaining a spring deformation action of the corrugated plate body 3. It is a schematic diagram explaining another aspect (the 9) of this invention. It is a schematic diagram explaining dispersion | distribution of the stress at the time of the pressure receiving of 3rd invention of this invention.

The shoe provided with the buffer member according to the present invention will be described first with reference to the buffer member according to the following embodiment, and then the shoe provided with the buffer member will be described with reference to the drawings.
It should be noted that the following embodiments can be appropriately modified within the scope of the technical idea of the present invention.

  First, the shock-absorbing member 1 according to the present invention will be described. The shock-absorbing member 1 is, as shown in FIG. 3, for example, a substantially plate made of a viscoelastic material (or also referred to as a viscoelastic body) that is an elastically deformable material. As shown in FIG. 4 or FIG. 4, a corrugated body 3 having a larger elastic modulus than a viscoelastic material is enclosed in a substantially cylindrical body 8.

The buffer member is made of an elastically deformable viscoelastic body, and the viscoelastic body has an Asker C hardness of 20 to 40. Here, “Asker C hardness” means hardness measured using a spring-type Asker C type durometer defined in SRIS0101 (Japan Rubber Association Standard).
The viscoelastic material is preferably a low-hardness rubber or gel. Silicone, urethane, polyethylene, acrylic, acrylic urethane, butadiene, isoprene, butyl, styrene butadiene, ethylene vinyl acetate copolymer, ethylene-propylene-diene ternary copolymer. Various low-altitude rubbers such as polymers and fluorine and gel materials can be applied, but gel materials are preferred from the viewpoint of excellent buffering properties. A thermoplastic elastomer having a tensile elongation (conforming to JIS K6251) of 500% or more is also suitable as a material that easily follows the stretching deformation of the corrugated body and is not easily broken even by excessive deformation. Specifically, for example, CF5056 (hardness: SRIS0101-compliant Asker C 30) manufactured by Toray Dow Corning Co., Ltd. can be used as the silicone gel, and Cosmo Gel manufactured by Cosmo Keiki Co., Ltd. can be used as the thermoplastic elastomer.
In addition, the viscoelastic body may be a foam, or may be a foam having an open cell or closed cell structure, or a viscoelastic material with a hollow filler added thereto.
Further, different materials having different hardnesses may be combined, used as a laminated structure, or mixed with a colorant, a lame material, a filler material, or the like.

Hereinafter, an example in which silicone gel is applied as a viscoelastic material will be described.
As shown in FIGS. 6 and 8, the buffer member preferably has a long shape, and has a pressure receiving buffer portion (A) 4 and an interlocking buffer portion (B) 5 in the vicinity thereof. The interlocking buffer portion 5 is deformed in conjunction with the pressure receiving deformation of the pressure receiving buffer portion (A) and exhibits a buffering action. And the corrugated body 3 harder (or more rigid) than the silicone gel is interposed inside the buffer member made of silicone gel so as to penetrate the pressure receiving buffer (A) 4 and the interlocking buffer (B) 5. The corrugated direction of the corrugated plate body 3 is arranged so as to be the longitudinal direction of the substantially plate-shaped body 2.
As shown in FIGS. 19A to 19C, the corrugated plate body 3 has an amplitude of the corrugated shape of the corrugated plate body with respect to the wave-out direction with respect to pressurization from the upper surface of the corrugated plate body. It is small and deforms while extending so as to have a long period, and when it is depressurized, it has a spring property that undergoes contraction deformation as in (d) and restores its original shape as in (e).

  When the corrugated plate 3 is interposed in the buffer member, as shown in FIG. 7, when the pressure receiving buffer (A) 4 receives stress or pressure, the silicone of the pressure receiving buffer (A) 4 Subsequent to (or almost simultaneously with) the gel deformation, the internal corrugated plate body 3 is stretched and deformed from the pressure receiving portion to a long length, and the entire silicone gel around the corrugated plate body is deformed while following the stretching deformation. Therefore, the stress received by the pressure receiving buffer portion (A) 4 is interlocked with the deformation of the silicone gel itself in the direction in which the corrugated body 3 is not stretched and deformed (short direction of the pressure receiving surface). Since it can be dispersed and absorbed as a deformation of the buffer part (B) 5, the buffer function is improved as compared with the concentrated deformation at one place in the conventional pressure receiving part, and the resilience function is also improved by the rigidity of the corrugated plate body. As a result, the buffer portion of the present invention Exhibits an excellent function and effect which combines high cushioning function and the resilience function.

  Furthermore, as another form of the substantially plate-like body 2, the hollow portion 7 may be formed at least part of the convex shape portion on the lower side of the corrugated plate body via a silicone gel or directly adjacent thereto. . Thereby, the corrugated plate body is more easily deformed during pressure reception, and the above-described action is easily exhibited, and also contributes to the weight reduction of the buffer member. The hollow portion may be a closed space or may be open to the outside of the buffer member. The shape of the hollow portion can be appropriately adjusted according to the deformation behavior at the time of pressure reception, and may be different for each convex shape portion. Further, as shown in FIGS. 18D and 18E, the bottom surface of the corrugated plate body may be floated. With this structure, the deformation of the silicone gel and the flexure of the corrugated plate body immediately after the heel contact pressure is released. Then, the shock absorbing property is applied, and then the pressure receiving deformation in the thickness direction advances, and after the corrugated plate hits the back side of the pressure receiving surface, the stretching deformation of the corrugated plate is activated and the entire buffer member is buffered. It is possible to exert an impact buffering effect on the entire buffer member while ensuring a feeling of ground contact start (less resistance).

  Moreover, it is good also as a structure which provided the corrugated body curve induction | guidance | derivation induction | guidance | derivation part 9 which bends and deform | transforms a corrugated sheet body into a concave shape by receiving pressure under the corrugated sheet body (behind the pressure receiving surface). For example, as shown in FIG. 21, after receiving the pressure, the corrugated body of the pressure-receiving buffer portion is bent and deformed so as to wrap the collar landing portion (FIG. 21 (b)). Since the interlocking buffering action works (FIG. 21C), an excellent buffering effect can be obtained while ensuring the stability of the center of gravity at the time of landing. The corrugated body bending inducing section 9 may be a gap, a second viscoelastic body that is softer than the viscoelastic body constituting the buffer member, or a combination thereof. Further, in the example of FIG. 21, the corrugated body bending inducing portion is provided at the center portion of the corrugated body, but it may be disposed at a portion where the corrugated body is bent, and includes at least a pressure receiving buffer portion.

  Furthermore, as another form of the buffer member, as shown in FIG. 20, a part of the corrugated plate body may be exposed from the silicone gel. By setting it as such a structure, the expansion-contraction deformation | transformation of a corrugated sheet body becomes still easier, and a gel can be easily changed to a elongate direction. Also, as shown in FIG. 20 (f), if the silicone gel is configured to receive pressure earlier than the corrugated plate body, as in FIGS. 18 (d) and 18 (e), a soft ground (less resistance) is provided. It is also possible to exert an impact buffering effect on the entire buffer member while ensuring a start feeling.

The corrugated plate 3 may be any wave as long as it exhibits the above action, but as shown in FIG. 9, it is preferably a triangular wave or a string wave having a period of 1.5 cycles or more. Moreover, it is preferable that the material of a corrugated body is resin.
Further, the resin material constituting the corrugated body 3 is not particularly limited as long as it can give a desired shape, and a known synthetic resin generally called plastic is appropriately selected. Specifically, for example, polystyrene, polyvinyl alcohol, ABS resin, polyvinyl formal, AS resin (SAN), polyvinyl petital, polyolefin, acetyl cellulose, vinylylene chloride resin, cellulose ether, vinyl acetate resin, methacryl Thermoplastic resins such as resin, polyamide (nylon), polyethylene terephthalate, polyacetal, silicone resin (silicon resin), polycarbonate and fluororesin, phenol resin, epoxy resin, urea resin, aniline resin, melamine resin, furan resin, diallyl phthalate It can be exemplified over preparative resin, polyurethane, a thermosetting resin such as unsaturated polyester resin.

The corrugated plate body preferably has a compression spring constant according to JIS K6385 of 1 × 10 ³ to 1 × 10 ⁶ N / m. If the compression spring constant of the corrugated body is smaller than 1 × 10 ³ N / m, the corrugated body easily deforms too much, and an appropriate tension against the thickness deformation of the shock-absorbing member when an impact is applied (the stiffness) ) Cannot be added. On the other hand, if it is larger than 1 × 10 ⁶ N / m, the rigidity of the corrugated sheet body is too high, and the corrugated sheet body is hardly stretched and deformed. It is not preferable.
Further, the compression spring constant of the corrugated plate body is set in the range of the compression spring constant according to the performance of the cushioning member, on the condition that the compression spring constant of the corrugated elastic body is larger than the compression spring constant of the viscoelastic body (based on JIS K6385). However, it is preferable that the ratio of the compression spring constant of the corrugated plate body to the compression spring constant of the viscoelastic body is 0.1 to 10. When the ratio is less than 0.1, the action of stretching and deforming the viscoelastic body by the corrugated sheet in the width direction is unfavorable. On the other hand, when the ratio exceeds 10, the deforming action of the corrugated sheet is dominant. This is not preferable because the synergistic effect of the corrugated body and the viscoelastic body in the present invention cannot be obtained.
Here, the compression spring constant is a static spring constant when 30% of the initial thickness is deformed in the thickness direction (30% compression). In the present invention, since the compression spring constant of the actual shape constituting the buffer member is important, the compression spring constant of the corrugated plate body and the viscoelastic body incorporating the corrugated plate body is not a value measured by a standard test piece, It is an actual shape, and is a value obtained from measurement when it is compressed and deformed in the thickness direction (wave amplitude direction in the corrugated plate body).

  Further, the corrugated plate body 3 can appropriately change the amplitude and period of the wave of the corrugated plate body (for example, a chord wave) depending on the type of the wearer. By changing the amplitude, period, and shape of the corrugated body, the rigidity of the corrugated body, the deformation behavior during pressure reception (deformation expansion and contraction of the corrugated sheet body), the repulsive force, and the center of gravity are guided in the desired direction. Since the adjustment can be freely set as a whole or a part, it is possible to guide in a good direction of movement of the center of gravity so as to force the bias of the center of gravity while achieving good buffering properties. For example, as shown in FIG. 10, the wave amplitude of the corrugated plate body in the pressure receiving buffer portion (A) can be reduced, and the wave amplitude of the corrugated plate body in the interlocking buffer portion (B) can be increased. The wave amplitude of the wave plate body in (A) is large, and the wave amplitude of the wave plate body in the interlocking buffer (B) can be reduced. Further, as shown in FIG. 11, the wave period (P1) of the corrugated plate body in the pressure receiving buffer (A) is large, and the wave period (P2) of the corrugated sheet in the interlocking buffer (B) can be reduced. On the contrary, the wave period of the wave plate body in the pressure receiving buffer part (A) is small, and the wave period of the wave plate body in the interlocking buffer part (B) can be increased.

Further, as another aspect of the corrugated plate body 3, depending on the type of wearer, for example, as shown in FIG. Can be larger. Referring to the drawings, in the example of FIG. 12A, the thickness of the corrugated plate body is such that the shoe outer side (t2) is thicker than the shoe inner side (t1) (t2> t1), and FIG. In the example of FIG. 12 (c), the corrugated plate body is overlapped on the outer side of the shoe (t2) and thicker than the inner side of the shoe (t1) (t2> t1). Further, in the example of FIG. A slit is made in the corrugated plate body so that the stiffness (rigidity) on the outside of the shoe is larger than the stiffness (rigidity) on the inside of the shoe.
According to this aspect, the center of gravity at the time of heel contact operates so as to deviate from the side with high rigidity to the side with low rigidity, so that it can be guided in a desired direction of movement of the center of gravity.

  Furthermore, for the purpose of the same effect, as another embodiment of the corrugated plate body 3, for example, the corrugated plate body 3 can have the vertex lines of each wave parallel or as shown in FIG. In addition, it can be alternated up to ± 30 degrees (continuous of C-shaped and inverted C-shaped).

  Further, as described above, since the buffer member has a ring-shaped part (substantially fan-shaped part), the corrugated plate body also has a ring-shaped part (substantially substantially) as shown in FIG. The fan shape and the period can be set to the outside (P1) and the inside (P2) is small).

Further, when the end of the corrugated body (the end point of the corrugated shape) faces downward, the corrugated body 3 acts from both ends so as to push up the gel slightly upward when the corrugated body is stretched and deformed. On the contrary, when the end of the corrugated plate is upward, the end of the corrugated plate acts to push the silicone gel diagonally downward during the stretching deformation, so the deformation behavior of the corrugated plate of the buffer member As another form for adjustment, as shown in FIG. 15 (a), it is possible to terminate the both ends to face downward, and in particular, by making both ends downward in the outsole direction, the corrugated plate body When the material is stretched and deformed, it acts from both ends so as to push up the gel slightly upward, and it is possible to provide a fit and stability at the time of landing buffering. In particular, since the human body tends to land from the outside of the sole, the end of the corrugated body on the outside of the outer sole is supported so that the outside of the sole is pushed upward slightly to support (adhere) the foot. The stability at the time of buffering can be further improved according to the landing state.
Also, as shown in FIG. 15 (b), both ends can be terminated so that one end is facing upward and the other is facing downward. Yes, for example, in the case of a movement that circulates in one direction as in a track competition, a constant load is applied to the outside of the sole on the in-course side of the track (the innermost circumference with respect to the track) and the inside of the sole on the out-course side Since the movement works a lot, the in-course side shoes have the inner corrugated plate end facing down and the outside facing up, and the out-course shoes have the corrugated plate end facing up and the outside facing down. It is good.
As another embodiment, as shown in FIG. 15 (c), the end can have rounded corners, or as shown in FIG. 15 (d), the end can have rounded corners. .

Moreover, although the said corrugated sheet body 3 is normally arrange | positioned in the center inside the said buffer member as shown in FIG. 7, as shown in FIG. May be arranged on the lower side from the center inside the buffer member. Furthermore, as shown in FIG. 16 (b), the corrugated plate body 3 may be disposed outside the shoe inside the cushioning member.
Moreover, in order to adjust the gravity center moving direction, it may be arranged so as to incline in the long direction of the substantially plate state and / or the short direction of the pressure receiving surface.

  Furthermore, the corrugated body 3 may have a bending inducing portion that is easy to be displaced on either one of the long sides as shown in FIG. 17 in order to facilitate deformation during pressure reception. Specifically, for example, as shown in FIGS. 17 (a) and 17 (b), either one of the thicknesses can be reduced to have a bending inducing portion that is easy to be displaced, It is also possible to have a bending inducing portion that is easily displaced by inserting a slit on either side.

In addition, the buffer member 1 includes a substantially plate-like body 2 or a substantially cylindrical body as a grounding buffer portion 10, and further, as shown in FIG. 5, a second buffer member molded into a target shape and the grounding buffer portion. More preferably, they are integrally connected by the connecting portion 13. For example, when applied to the heel portion, the second buffer member functions as the heel buffer portion 11, and according to this aspect, after the shock immediately after grounding is buffered by the ground buffer portion, the ground buffer portion Then, the center of gravity can be stably moved while shock-absorbing toward the heel buffer portion 11 via the connecting portion 13, and the walking performance from the landing start to the heel portion landing can be improved. Further, the connecting portion 13 also acts as a leaf spring, and after the center of gravity shifts to the toe side, the grounding buffer portion side is pressed against the heel S side and has an effect of fitting to the heel S.
The heel buffering portion 11 is formed in a truncated cone shape protruding on the connecting portion 13 and is positioned directly below the wearer's heel S in a state assembled to the shoe 6 as will be described later. It will be installed. As an example, as shown in FIG. 1 and FIG. 5, it is integrally formed so as to have a fan shape in plan view.

Here, the material of the heel buffer portion 11 and the connecting portion 13 will be described. Any suitable rubber material or gel material can be adopted as long as good buffering properties can be obtained. For example, silicone-based materials (for example, Toray CF5058 manufactured by Dow Corning), urethane system (for example, manufactured by Nippon Milactone Co., Ltd .: Miractolan E375), styrene system (for example, manufactured by Asahi Kasei Chemicals Co., Ltd .: Asaprene T436), acrylic system (for example, Nipol AR manufactured by Nippon Zeon Co., Ltd.) A rubber material such as a rubber material such as injection molded, extruded or blow molded can be used. Incidentally, when considering mass productivity, it is preferable to use injection molding.
In addition, by mixing a foaming agent or a hollow filler into the rubber material, all or a part of the heel buffer part 11 or the connecting part 13 is made to be in a foamed state with an expansion ratio of about 0.1 to 1.5. Further, it may be configured to reduce the weight together with the buffering property.
In this case, as the hollow filler, “Expancel (registered trademark) 551DE” manufactured by Nippon Philite Co., Ltd. is adopted and used at a blending ratio of about 1 to 3 parts by weight with respect to 100 parts by weight of the rubber material.

In addition, the ground buffer portion and the connecting portion 13 are connected in an L shape or a T shape, where the bottom surface of the connecting portion 13 is continuous with the bottom surface of the ground buffer portion. This means a state in which the ground buffer portion and the connecting portion 13 are L-shaped in cross section. Further, the T-shape is a state in which the end of the connecting portion 13 is connected to the center of the height of the grounding buffer portion, and the cross-section of the grounding buffer portion and the connecting portion 13 is T-shaped. That means.
The connecting part 13 receives the movement of the center of gravity from the grounding buffer part and deforms and cushions the shock, and has a role of stably guiding the center of gravity to the bag buffer part. In the landing, the deformation of the grounding buffering portion becomes remarkable, and it is possible to obtain the joint operation of the grounding buffering portion and the heel buffering portion 11 through the connecting portion 13 as described later. The connection part between the connecting part 13 and the grounding buffer part can be adjusted as appropriate depending on the place where the shoe is incorporated into the shoe and the way of moving the center of gravity during walking (running), but in order to express the above-mentioned effects more effectively. Is preferably connected to a portion from the bottom of the grounding buffer to the center of the height dimension.

  In the buffer member according to the present invention, the method of interposing the corrugated body 3 in the substantially plate-shaped body 2 or the cylindrical body is not particularly limited. For example, the corrugated body is uncured in a mold. Examples thereof include a method of in-mold molding with a silicone gel, and an assembly method in which a corrugated plate body is fitted into a silicone gel component in which a corrugated portion of the corrugated plate is formed and then sealed with a silicone gel.

Next, the shoe 6 in which the cushioning member 1 is incorporated will be described by taking the cushioning member 1 including the ground cushioning portion 10, the connecting portion 13, and the heel cushioning portion 11 as an example.
In FIG. 1, what is shown by the code | symbol 6 is the sport shoes which are an example of shoes, Comprising: Upper 22 is assembled | attached with respect to the sole 21 which is a grounding member.
Then, the receiving space 23 is hollowed out from the rear end of the heel portion 21a to the vicinity of the lower part of the heel portion 21a (above the portion where the wearer contacts the earliest when walking or running) with respect to the sole 21. The sole 21 and the upper 22 are assembled in the receiving space 23 in a state in which the cushioning member 1, the bag cushioning portion 11, and the coupling portion 13 are assembled.
The sole 21 is generally configured by combining a plurality of parts in a stacked state, and an assembly portion of the buffer member 1, that is, a formation portion of the receiving space 23 is an outsole, a midsole, or an insole. An appropriate site can be selected, such as.

  The shoe provided with the shock-absorbing member of the present invention is configured as described above as an example. However, the position of incorporation into the shoe and desired characteristics (balance between shock-absorbing and resilience, and center-of-gravity inductiveness, etc.) ), The above-described various types of buffer members can be appropriately applied.

Next, behavior during use will be described.
[State before landing]
In the state where the wearer of the shoes 6 is walking or running, in the state before landing, the bag cushioning portion 11 is not deformed because no pressure is applied. Further, the buffer member 1 is not deformed because no pressure is applied.

[State at the moment of landing]
Next, considering the state at the moment of landing, as shown in FIGS. 6 and 7, the pressure receiving part (A) 4 (grounding buffer part) of the buffer member 1 is subjected to the weight of the wearer and the impact of the grounding. Then, the grounding buffer part is deformed to buffer the grounding shock. At this time, the deformation pressure receiving portion was concentrated in one place by the action of the silicone gel 2 and the corrugated plate body 3 in the ground buffer portion, and the entire surrounding gel was interposed through the corrugated plate body from the inside. By spreading, the deformation changes from being concentrated at one place to a dispersed state. As a result, the shock absorbing function is remarkably improved and the resilience performance is also high, so that the stability of the center of gravity is also excellent. In addition, when a buffer member having a form in which the deformation behavior of the corrugated plate body is partially different as shown in FIGS. 10 to 18 is applied, the center of gravity at the time of grounding is guided to be corrected to the target center of gravity movement path. Is done. Further, when the buffer member having the structure as shown in FIG. 18 (e) or FIG. 20 (f) is applied, the landing is made with a soft feeling utilizing the softness peculiar to the silicone gel, and the corrugated body has a concave shape. While guiding the center of gravity to the flexural deformation part, it is possible to obtain an excellent buffering effect by co-operation of the stretching deformation of the corrugated sheet and the deformation of the silicone gel, and the center of gravity is stabilized by the resilience of the corrugated sheet. It is done.

[State after landing]
Next, considering the state after landing, the grounding buffering portion restores its shape in conjunction with the movement of the walking center of gravity from the landing, and acts to smoothly guide the center of gravity to the heel buffering portion 11 while buffering the impact.
In this state, the weight of the wearer 11 is deformed because the weight of the wearer and the impact of the grounding are applied to the heel buffer 11, but the movement direction of the center of gravity is stably ensured by the sufficient resilience of the buffer member 1. Therefore, the grounding buffer 10 and the heel buffer 11 co-operate with the connecting part 13 interposed therebetween, so that the impact is effectively released while ensuring the stability of the center of gravity.
In addition, the ground buffer portion is moved in conjunction with the shock buffering state of the heel buffer portion 11 in conjunction with the movement of the center of gravity in the toe direction, and the shape is further restored. Smooth center of gravity movement in the direction can be realized.
Further, after the center of gravity shifts to the toe side, the heel buffer portion 11 and the connecting portion 13 are connected in an L shape or a T shape. It is pushed to the side and works to fit the heel S, improving the reproducibility of the landing buffering portion and the landing part again, and stabilizing the walking shock buffering behavior, so that the shock buffering and good There is an effect to achieve both walking ability.

  In the first embodiment, the cushioning member 1 is applied to the landing start portion of the heel portion. However, the cushioning member 1 may be provided singly or in a plurality in the vicinity of the side surface of the heel portion or the mother-child hill of the toe portion.

  In order to verify the effect of the present invention, in the shoe of Example 1 and in Example 1 as a comparative example, in the same manner as in Example 1 except that the corrugated plate body is not encapsulated in the silicone gel, As a result of making a shoe incorporating it and having 10 subjects actually wear it, and as a result of sensory tests on buffering, walking and running, Example 1 was superior in all evaluations compared to the comparative example. It was.

  Since the shoe provided with the cushioning member of the present invention includes the cushioning member in which the corrugated plate body is disposed inside the viscoelastic body, the cushioning member can be thinned while maintaining excellent shock buffering properties. In particular, since the buffer function and the stability of the center of gravity of the heel portion are improved, it can be applied in a wide range from sports shoes for athletes to walking shoes, business shoes, and shoes for children.

DESCRIPTION OF SYMBOLS 1 Buffer member 2 Substantially plate-shaped body 3 Corrugated plate body 4 Pressure receiving buffer part (A)
5 Interlocking buffer (B)
6 Shoes 7 Hollow part 8 Substantially cylindrical body 9 Corrugated plate curve inducing part 10 Grounding buffer part 11 Kite buffer part 13 Connection part 21 Sole 22 Upper 23 Receiving space 24 Outer sole

Claims (11)

A shoe comprising a buffer member comprising a viscoelastic body (a) and a corrugated body (b),
The viscoelastic body (a) has a penetration of JIS K2207 of 5 to 250 or Asker hardness (C type) of 0 to 40,
The corrugated plate body (b) has a higher hardness than the viscoelastic body (a) and elasticity that stretches and deforms in the corrugated continuous direction, and is viscoelastic toward the corrugated peak in the pressure receiving direction of the buffer member at the time of landing. A shoe comprising a cushioning member, wherein the body (a) is entirely or partially embedded in the body (a). The buffer member is a substantially plate-like body or a substantially cylindrical body having a pressure-receiving buffer portion (A) that undergoes pressure-receiving deformation and an interlocking buffer portion (B) that deforms in conjunction with the deformation of the pressure-receiving buffer portion (A) in the vicinity thereof. There,
The corrugated plate body (b) has a configuration in which all or part of the corrugated plate body (b) is embedded in the viscoelastic body (a) so as to penetrate the pressure receiving buffer section (A) and the interlocking buffer section (B).
In conjunction with the pressure-receiving deformation of the pressure-receiving buffer portion (A), the interlocking buffer portion (B) is deformed in the direction of the stretching deformation by the stretching deformation of the corrugated plate body (b) starting from the pressure-receiving buffer portion (A). The cushioning member according to claim 1, wherein the cushioning action of the corrugated plate body (b) and the cushioning action of the viscoelastic body (a) in the direction in which the corrugated body (b) is not stretched and deformed co-operate. shoes. The corrugated body (b) further has flexibility to bend and deform, and the viscoelastic body (a) is provided with a corrugated body bending induction part on the landing side. A shoe comprising the cushioning member according to 2.   The corrugated plate (b) has a hollow portion at least part of the convex shape portion on the pressure-receiving lower surface side through the viscoelastic body (a) or directly adjacent thereto. A shoe comprising the cushioning member according to any one of 3 above. The buffer member has a long shape, and the corrugated body (b) is arranged such that the direction of stretching deformation of the corrugated body (b) follows the longitudinal direction of the buffer member. A shoe comprising the cushioning member according to claim 1.   The corrugated plate (b) is made of resin, and the waveform thereof is a triangular wave or a chord wave. The shoe with a cushioning member according to any one of claims 1 to 5, The corrugated plate body (b) has a compression spring constant according to JIS K6385 of 1 × 10 ³ to 1 × 10 ⁶ N / m, and the corrugated plate body compression spring with respect to the compression spring constant of the viscoelastic body (a) The shoes with the cushioning member according to claim 1, wherein the ratio of the constants is 0.1 to 10.   The corrugated plate body (b) is finished so that the outsole side faces downward, and the shoe provided with the buffer member according to any one of claims 1 to 7.   The corrugated body (b) is finished with the shock absorbing member according to any one of claims 1 to 7, wherein both ends of the corrugated plate body are finished so that one of the ends faces upward and the other faces downward.   The shoe with a buffer member according to any one of claims 1 to 9, wherein the buffer member has a structure integrally formed with the second buffer body via a connecting portion.   The shoe with a cushioning member according to any one of claims 1 to 10, wherein the cushioning member is arranged and incorporated in a midsole of a landing portion.

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