JPH0691848B2 - Shock absorbing repulsion member for shoe sole - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a shock-absorbing repulsive member for a shoe sole, which is mounted inside the shoe sole, and more specifically, the present invention relates to a landing during exercise such as running. Combining a shock absorber that absorbs a reaction from the ground, which is equivalent to about three times the weight of the body weight, that is, a shock, and a shock absorber that increases the repulsive force and promotes the kick force. , A shoe sole member that imparts a repulsion mechanism for increasing repulsive force and promoting kick force.

BACKGROUND OF THE INVENTION So far, for example, it has been proposed to use a gel material, a low-resilience rubber or the like as a cushioning material on the sole of an athletic shoe in order to cushion the foot when landing during running. .

However, although such a cushioning material has a cushioning effect of attenuating and dispersing impact vibrations at the time of landing, on the contrary, the repulsive energy for propelling the kick force due to the action of such a cushioning material is the sole. However, there is a drawback in that it is not satisfactory as a shoe used for sports that require an especially rapidity.

Therefore, especially in the field of sports shoes, it has a structure that can exert a sufficient repulsion action as well as a shock absorbing action,
Moreover, development of shoe soles with excellent durability is desired.

[Problems to be Solved by the Invention] The present invention has been made in view of the background as described above, and a shock absorbing mechanism and a repulsion mechanism can be provided to the sole by mounting the shoe inside the sole. It is an object of the present invention to provide a shoe sole member having sufficient durability even for continuous use.

[Structure of the Invention] The shock-absorbing repulsive member for a shoe sole of the present invention is a shock-absorbing repulsive member for a shoe sole, which is a combination of a shock-absorbing member and a repulsive member, and is installed in a shoe sole, wherein the shock-absorbing member is It is a substantially semi-lumped gel substance having a diameter smaller than that of the repulsion body, the repulsion body is made of a material having at least a bending elasticity higher than that of the material of the buffer body, and a space for allowing elastic deformation of the buffer body. And having a substantially hemispherical shape for covering the cushioning body, the vertex of the substantially hemispherical shape of the cushioning body is in contact with the vertex of the inner surface of the repulsion body, and the cushioning body is accommodated in the repulsion body. It is characterized by being.

Hereinafter, the member of the present invention will be described with reference to the accompanying drawings.

FIG. 1 attached herewith is a view showing an athletic shoe in which a shock-absorbing repulsive member of the present invention in a preferred form is installed, divided into members, and FIG. 2 is a schematic vertical sectional view of the installation part.

A shoe 1 equipped with a shock-absorbing repulsive member 2 for a shoe sole of the present invention shown in FIG. 1 has a shoe upper 3 covering a foot portion when worn, and a shoe sole 4 positioned at the bottom of the shoe upper 3. Consists of.

In the example shown in FIG. 1, the shoe upper 3 has an insole 5, an insole 6 and a core 7 at the bottom, and the shoe sole 4 is a midsole 8.
It has a two-layer structure of an outer bottom 9 and a structure in which the shock absorbing repulsion member 2 of the present invention is installed inside the heel portion of the midsole 8 among them.

In FIG. 1, the shock-absorbing repulsive member 2 of the present invention is installed inside the heel of the shoe sole, but the position of installation is not limited to the heel, and when landing on the toe, etc. It is possible to install it at a site that is buffered and needs repulsive force.

The buffer body 10 has a lump-like shape, and is a substantially hemispherical lump in the example shown in FIGS. 1 and 2, and the repulsion body 11 has a substantially hemispherical shape having a diameter larger than that of the buffer body 10. It has a hollow shape and is arranged so that the apex of the hollow inner surface of the repulsion body 11 is in contact with the apex of the substantially hemispherical buffer body 10.
The buffer 10 is covered with a space in which the elastic deformation is possible. That is, the spherical diameter that defines the shape of the repulsion body 11 is a buffer body.
Since it is larger than the diameter of the spherical shape that defines the shape of 10,
A space is secured around the. Further, the lower ends of the buffer body and the repulsion body are on the same plane.

The shock-absorbing repulsive member for a shoe sole of the present invention having the above-described shape is installed in the shoe sole as shown in FIGS. 1 and 2, and the load mainly applied in the vertical direction is applied to the shock-absorbing member and the repulsive member. At the same time, the shock is absorbed by the buffer, and the repulsive force is applied by the repulsive body.

That is, when a vertical load is applied to the repulsion body, as shown in FIG. 3, the curved top of the repulsion body 11 is deformed so as to be slightly dented to store energy, and is stored by the deformation at the time of kicking during running. The upward bias is created by the tendency of the energy to return to its original shape.

On the other hand, the load applied to the repulsive body is simultaneously applied to the buffer body 10,
The cushioning body 10 made of a gel-like substance having a low elastic coefficient can be freely deformed into a surrounding space by a load to sufficiently absorb the cushioning.

As described above, the repulsion body and the cushioning body are usually combined in direct contact with each other so as to receive the weight at the same time, but as long as it is possible to transfer the load received by the repulsion body to the cushioning body substantially at the same time, the Obviously, they may be in contact with each other via some other material.

The repulsion body is made of a material having at least a bending elasticity higher than that of the material of the buffer body, and the load applied to the repulsion body is also applied to the buffer body at the same time as described above. Even if a load of about 3 times the body weight is applied, permanent strain does not occur or damage, and since the cushioning body is also covered by the repulsive body, permanent strain does not occur or damage due to the load. In addition, the shock-damping repulsion member of the present invention has extremely excellent durability because it is unlikely to cause fatigue even under repeated loads.

Further, the shapes of the buffer body and the repulsive body are not limited to those described above, and the buffer body may be in the shape of a lump so as to be able to absorb an applied impact, for example, the shape of a sphere such as a sphere or a cylinder. can do.

The repulsion body has a shape capable of covering the cushioning body by leaving a space for elastic deformation when the cushioning body receives a load, and the repulsion body itself stores energy by the deformation due to the load and repulsive force. Any shape that can generate

For example, FIGS. 4 and 5 attached herewith have a plurality of repulsion bodies 11 and bending portions 12 each having a Ω-shaped vertical cross-section formed by bending a side bottom portion inward to form a bellows shape. 1 is a schematic vertical sectional view of a shock absorbing repulsive member for a shoe sole according to the present invention, which is formed by combining a cylindrical repulsive member 11 with a cylindrical buffer member 10, respectively. In these shock absorbing repulsive members, the repulsion body 11 is provided with the bent portion 12 to make it easier to deform the repulsion body in the vertical direction. It is intended to improve flex resistance.

Further, as shown in FIG. 6, a plurality of holes 13 are provided in the repulsion body 11, or the thickness of the repulsion body 11 is changed as shown in the cross section of FIG. It is also possible to adjust the force.

The shock-absorbing repulsion member for shoe soles of the present invention as described above has a shape such that the shock-absorbing body is housed inside the repulsion body as long as a space allowing elastic deformation is secured around the shock-absorbing body. In other words, the shape of the repulsive body described above may be such that the bottom is closed by a flat surface.
FIG. 8 shows a cross-sectional view of a member having a shape similar to that of the member shown in FIG. 1 and a cushioning member completely housed inside the repulsion member.

As shown in FIG. 8, when the repulsion body has a hollow hemispherical shape in which the planar portion is closed, the flat surface of the repulsion body may be deformed so that the peripheral portion of the hemispherical portion of the repulsion body expands by the load. Is particularly advantageous in that it suppresses energy loss, prevents excessive deformation of the hemispherical portion, and obtains sufficient repulsive force and durability of the repulsive body. In addition, in the case of such a shape, the repulsion body may be a structure that seals the cushioning body and the air around it and may have a structure in which the internal air does not escape to the outside even if a normal load is applied. The structure may be such that the air inside can escape to the outside.

When the shock-absorbing repulsive member of the present invention is installed in the shoe sole, for example, the member is fitted in the recess provided in the midsole,
For example, the shoe bottom is fixed in the shoe sole by covering it with a core, and the shoe sole is, for example, as shown in FIG. It must be able to secure space. As long as this space is secured and the load from the outside of the shoe sole is immediately transmitted to the member, the member may be fixed in the shoe sole in any shape. For example, as shown in FIG. The shoe sole material may be fixed so as to be completely adhered thereto, or may be fixed in a cylindrical space whose height and diameter are equal to those of the repulsive body, as shown in the cross section in FIG.

For the latter fixing, for example, the midsole may be provided with the above-mentioned cylindrical concave portion, a member may be fitted therein, and the member may be covered with, for example, a core, which is preferable in actual manufacturing. Further, since a space is secured outside the repulsion body, the repulsion body is easily deformed, and the deformation of the repulsion body due to the load is adjusted.

Further, the load applied to the shock-absorbing repulsive member for shoe soles of the present invention is applied by the wearer from the upper part, but at the same time, the impact is applied from the lower side as a reaction. It is optional whether or not to place it inside the shoe sole. FIG. 10 is a schematic view of the shoe sole when the shock-absorbing repulsive member for a shoe sole of the present invention having the same shape as that of FIG. 8 is arranged with its plane side up, and FIG. 11 is a schematic sectional view. Shown in Figure 12. FIG. 11 shows a shoe sole formed of two layers of a midsole 8 and an outer sole 9 to which the shock absorbing repulsive member of the present invention is applied. A plate 14 in which the member 2 is embedded and which is made of the same or similar material as the shoe sole material having an appropriate thickness.
Is posted. FIG. 12 shows the sole shock-absorbing repulsive member 2 of the present invention applied to a sole 4 having a single layer instead of the two-layer structure shown in FIG. Such an abutting plate is not placed, and the upper surface of the member is arranged so as to be flush with the upper surface of the shoe sole.

In addition, in the shoe sole shown in FIGS. 11 and 12, in order to stabilize the member to be installed, the bottom surface of the cylindrical recess into which the member is fitted has a shape that matches a part of the repulsive body curved surface. There is provided a recess into which a part of the curved surface of the member can be fitted and adhered when the member is mounted.

When the shock-absorbing repulsive member of the present invention is mounted in such a form, the contact area with the sole of the foot is enlarged due to the flat upper portion, and the stability is increased, and the impact at the time of landing that is not always from directly below. Since it can be received on the curved surface side, shock absorption can be efficiently performed, which is particularly preferable.

The shoe sole to which the shock-absorbing repulsive member for shoe sole of the present invention is applied is not limited to the above-mentioned one, but may be applied to a shoe sole having a plurality of laminated layers, for example.

The plane shape of the shock-absorbing repulsive member for a shoe sole of the present invention described above is circular, but is not limited to a circle as a matter of course, and in addition to an ellipse or the like, any shape is particularly considered in consideration of the shape of the heel of the shoe. It can be shaped.

It should be noted that the use of the term substantially hemispherical with respect to the shapes of the buffer body and the repulsive body means that the curved surfaces used for each do not have to be a correct hemispherical shape, and the desired repulsive force, A spherical surface, a part of a spheroid, or any other curved surface can be used depending on the shape and size of the shoe sole to be installed.

The size of the shock-absorbing repulsive member for a shoe sole of the present invention can be arbitrarily selected according to the size of the shoe sole to be installed, desired repulsive force, shock-absorbing force, etc., but a substantially hemispherical repulsive body is used. In this case, the repulsive body preferably has a diameter of 30 mm to 40 mm and a height of 8 mm to 11 mm.

The gel-like substance used in the shock absorber of the shock-absorbing repulsive member for shoe soles of the present invention includes gel-like substances obtained by gelling various polymers, such as silicone gel, acrylic gel, urethane gel and the like. In the present invention, the penetration is
It is preferable to use about 20 to 200 gel substances.

A particularly preferred gel-like substance is represented by the following formula I: RR ¹ ₂ SiO- (R ² ₂ SiO) _n SiR ¹ ₂ R (I) [wherein R is an alkenyl group and R ¹ is an aliphatic unsaturated bond] It is a monovalent hydrocarbon group which does not have, R ² is a monovalent aliphatic hydrocarbon group (at least 50 mol% of R ² is a methyl group, and when it has an alkenyl group, its content is 10 mol% And n is a number such that the viscosity of this component at 25 ° C. is 100 to 100,000 cst], and the viscosity at 25 ° C. is 5000 cst or less. And an organohydrogenpolysiloxane (B component) having a hydrogen atom directly bonded to at least 3 Si atoms in one molecule,
A ratio (molar ratio) of the total amount of alkenyl groups contained in the diorganopolysiloxane (component A) to the total amount of hydrogen atoms directly bonded to Si atoms in the diorganohydrogenpolysiloxane (component B). There is an addition type silicone polymer obtained by curing a mixture adjusted to have a ratio of 0.1 to 2.0.

This curing reaction is usually performed using a catalyst. Platinum-based catalysts are suitable as the catalyst, and examples of such platinum-based catalysts include finely pulverized elemental platinum, chloroplatinic acid, platinum oxide,
Examples thereof include complex salts of platinum and olefins, platinum alcoholates, and complex salts of chloroplatinic acid and vinylsiloxane.

The components A, B and the catalyst as described above are mixed and allowed to stand at room temperature or heated to be cured to form the silicone gel used in the present invention. The heating temperature for heating and curing is usually 50 to 160 ° C.

The silicone gel thus obtained has JIS K (K
Penetration measured with −2207-1980 50g load) is usually 5 to 25
Although it is 0 degree, in the present invention, the penetration is 20 as described above.
It is preferable to use the one having about 200.

The hardness of such a silicone gel can be adjusted by using the amount of the component A in excess of the amount capable of forming a crosslinked structure with the hydrogen atom directly bonded to Si in the component B. it can. As another method, it can be adjusted by previously adding a silicone oil having methyl groups at both ends in an amount within a range of 5 to 75% by weight with respect to the obtained silicone gel.

The silicone gel having such characteristics can be prepared as described above, or a commercially available one can be used. Examples of commercially available products that can be used in the present invention include those manufactured by Toray Silicone Co., Ltd.
Examples include CF5027, TOUGH-3, TOUGH-4, TOUGH-5, TOUGH-6, X32-902 / cat1300 manufactured by Shin-Etsu Chemical Co., Ltd., F250-121 manufactured by Nippon Unica Co., Ltd., and the like.

Additives such as pigments, curing retardants, flame retardants, and fillers may be added to the gel-like substance described above within a range that does not impair the properties of the gel-like substance to be obtained. The composite gel described above may be used. Examples of such hollow microsphere materials include Philite (registered trademark) of Nippon Philite Co., Ltd., Expancel (registered trademark) of Nippon Philite Co., Ltd., Matsumoto Micro Co., Ltd. of Matsumoto Yushi-Seiyaku Co., Ltd. Examples include spheres.

Further, as the material of the repulsive body, a material having a larger flexural elasticity, flexibility and higher toughness than that of the cushioning body is used. Although thermoplastic elastomers and thermosetting elastomers having rubber elasticity, such as polyethylene, polyurethane, and polyester, can be used, those with a flexural modulus of 900 to 1100 kg / cm ² are particularly preferable, and those with a strong resistance to repeated bending are recommended. It is preferable to select it. Specifically, for example, Resitop PL-4962, which is a phenolic resin manufactured by Gunei Chemical Industry Co., Ltd., a urea resin R series manufactured by Ihara Chemical Industry Co., Ltd., among them R-300, Toray DuPont Co., Ltd. There are manufactured Hytrel, or those obtained by reinforcing these with carbon fibers, boron fibers, whiskers, and the like.

The shock-absorbing repulsive member for shoe soles of the present invention can be manufactured by molding the repulsive member and the shock-absorbing member with respective materials into desired shapes and combining them.

In the case where the cushioning body is accommodated in the repulsion body as shown in FIG. 8, if the repulsion body is manufactured separately for the main body forming the curved surface portion and the lid body forming the flat surface portion, It is preferable that the separately manufactured buffer body is put in the repulsion body and then the lid body is fitted to the body so that the member can be easily manufactured. In this case, if the lid 16 is fitted from the outside of the peripheral edge of the main body 15 as shown in the schematic cross section in FIG. 13, the curved edge of the main body is deformed so as to widen as described above. It is preferable that this is surely prevented by the lid portion of the flat portion.

Further, when the repulsive body is manufactured separately for the main body and the lid, it is possible to easily adjust the repulsive force of the repulsive body by manufacturing them with materials having different bending elasticity.

[Example] An impact cushioning repulsive member for a shoe sole of the present invention was manufactured, and its impact cushioning force and repulsive force were measured.

The manufactured shock-absorbing repulsive member for shoe soles of the present invention has a shape shown in FIG. 13, and the repulsive member is a thermoplastic elastomer commercially available under the name of Hytrel 4767 from Toray DuPont. The shock-absorbing repulsive member for a shoe sole of the present invention was manufactured by separately manufacturing a main body that is a curved surface portion and a lid body that is a flat surface portion, and mounting a cushioning body, and then fitting the lid body.

The repulsion body had a shape of a part of a spherical surface with a radius of 30 mm, the diameter was 40 mm, and the height from the apex to the plane portion was 11 mm.

The buffer is based on silicone marketed by Toray Silicone Co., Ltd. under the name TOUGH-6 with Microsphere F-80ED manufactured by Matsumoto Yushi-Seiyaku Co., Ltd. as a filler. Silicone: filler = 98: 2 weight ratio It was manufactured using a mixture of The penetration of this composite silicone gel was about 32.

The buffer was a part of a sphere with a radius of 12.5 mm, and the height from the bottom to the top was 9 mm, and the diameter of the bottom was 24 mm.

The manufactured shock-absorbing repulsive member of the present invention was provided on an ethylene-vinyl acetate copolymer (EVA) plate for a shoe sole having a thickness of 20 mm, and the curved surface side was formed in a cylindrical recess having the same diameter and height as the member. The sample was mounted on the top (upward).

Also, turn the shock absorbing repulsion member produced above upside down,
That is, a sample mounted in the same EVA plate with the flat side facing up (downward) was prepared.

Drop a 10 kg weight from a height of 5 cm directly above the sample member,
Acceleration at the time of collision was comparatively measured by an accelerometer attached to the weight. The repulsive force is represented by the ratio (%) of the generated energy to the energy applied to the sample at the time of collision.

The results are shown in the table below.

As can be seen from the above results, the shock absorbing force is slightly better when installed upward, and the repulsive force is better when installed downward, but in both cases, excellent shock absorbing action and repulsion are obtained. The action is obtained.

[Effects of the Invention] The load mainly applied in the vertical direction is simultaneously transmitted to the shock absorber and the repulsive body, the shock is absorbed by the shock absorber, and the repulsive force is applied by the repulsive body.

That is, when a vertical load is applied to the repulsive body, the curved surface of the repulsive body is deformed so as to be slightly dented to store energy,
At the time of a kick during running, the energy stored by the deformation tends to return to its original shape, which causes upward bias.

On the other hand, the load applied to the repulsive body is simultaneously applied to the cushioning body, and the cushioning body made of a gel-like substance having a low elastic coefficient can be freely deformed into the surrounding space by the load to sufficiently absorb the shock. Moreover, as the amount of deformation of the repulsion body increases, the bending elasticity of the repulsion body can be increased and the amount of deformation of the buffer body can be increased, and as a result, it is almost proportional to the impact force during landing during running. It can exert a repulsive action and a shock absorbing action.

Further, the member of the present invention has excellent durability due to the material used and its shape, and therefore, the shoe manufactured using the member of the present invention has excellent shock absorbing performance and repulsive force generation over a long period of time. It can perform well.

The shock-absorbing repulsion member of the present invention includes sports shoes such as jogging shoes and tennis shoes, mountain climbing shoes,
It can also be used for ski shoes and general leather shoes.

[Brief description of drawings]

FIG. 1 is a view showing a shoe equipped with a shock-absorbing repulsive member for a shoe sole of the present invention, and FIGS. 2 to 5, FIG. 8, FIG. 9, and FIG. 13 are shoe soles of the present invention. FIG. 6 is a view showing a shock absorbing / repelling member for shoes, and FIGS. 6 and 7 are views showing a repellent body used in the shock absorbing / repelling member for a sole of the present invention, and FIGS.
FIG. 1 is a view showing a shoe sole equipped with a shock absorbing repulsive member for a shoe sole of the present invention.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Berry Tay Bates United States, Oregon 97405, Eugene, Monroe Street 3809 (72) Inventor Joseph Joseph Ellis United States, California, 92037, La Jolla, Suite・ 2144, Villa La Jolla Drive ・ 8950 (72) Inventor Nakanishi Mikuiku 1-461-47 Tenma Tenma, Fuji City, Shizuoka Prefecture Inventor Hiroshige Ozawa 155 Okitsuhonmachi, Shimizu City Shizuoka Prefecture (56) Reference References: 1-154807 (JP, U): 63-159501 (JP, U): 1-80003 (JP, U)

Claims (9)

[Claims] 1. An impact cushioning repulsion member for a shoe sole, which is formed by combining a cushioning body and a repulsion body, and is mounted in a shoe sole, wherein the cushioning body has a substantially semi-lump shape having a diameter smaller than that of the repulsion body. It is a gel substance, and the repulsive body is made of a material having at least a bending elasticity higher than that of the material of the buffer body, and has a substantially hemispherical shape which covers the buffer body by providing a space for allowing elastic deformation of the buffer body. The shock-absorbing repulsion for shoe soles, which is characterized in that the shock-absorbing repulsion for a sole is characterized in that the shock-absorbing body has a substantially half-lump-shaped vertex of the shock-absorbing body in contact with a vertex of an inner surface of the repulsive body and the shock-absorbing body is housed in the repulsive body. Element. 2. The shock absorbing repulsive member for a shoe sole according to claim 1, wherein the repulsive body has a vertical cross-sectional shape of Ω type. 3. The shock-absorbing repulsion member for a shoe sole according to claim 1, wherein the repulsion member has a plurality of bellows-shaped bent portions around the repulsion member. 4. The shock absorbing repulsion member for a shoe sole according to claim 1, wherein the repulsion member has a plurality of holes. 5. The shock absorbing repulsion member for a shoe sole according to claim 1, wherein the repulsion member has a different thickness depending on a portion thereof. 6. The repulsion body has a bottom portion for defining a closed space having a substantially hemispherical shape, the apex of the substantially hemispherical shape of the shock absorber comes into contact with the apex of the inner surface of the repulsion body, and the bottom surface of the shock absorber has a resilience. The shock absorbing repulsive member for a shoe sole according to claim 1, wherein the shock absorbing member is housed in the repulsive member so as to contact the inner bottom surface of the body. 7. A shoe sole equipped with the impact cushioning repulsive member for a shoe sole according to claim 1. 8. A shoe sole in which the shock-moving shoe cushioning / repulsing member for a shoe sole according to claim 6 is mounted so that the flat side of the member is the upper side. 9. A shoe in which the shock-absorbing repulsive member for a shoe sole according to any one of claims 1 to 6 is mounted in the shoe sole.