JP5123589B2 - Flat heterogeneous cushioning material and shoes comprising the planar heterophasic cushioning material - Google Patents

Description

  The present invention relates to a shock-absorbing member suitable for use in a heel region for shoes, and particularly relates to a planar heterophase-type shock absorbing material in which members having different properties are combined together.

Especially for sports shoes, walking shoes, etc., much research and development has been conducted in order to improve the buffer function. This technical pursuit extends from the development of the material itself to the ingenuity of the shape of the shock-absorbing parts, based on the behavior of the user according to the purpose of the shoe and the actual analysis of the impact. In addition, the appeal of merchantability is also indispensable from a sales point of view, and there is a need for a device that can visually recognize such an excellent buffer function.
As a response to such a request, for example, an invention relating to a patent application of the present applicant exists as a prior art (see Patent Documents 1 , 2 , 3 , and 4). With these technologies, shoes that provide high-level cushioning and can visually confirm the function are provided on the market.

However, the applicant continues to try further improvements without being reluctant to such a high evaluation of the market. In particular, from the viewpoint that, for example, the impact on the bag is not just a compressive load from above, we have been diligently trying to find a suitable structure.
Specifically, the aim is to try to improve the function of the shock absorbing parts by integrating differently different materials together, but as a prior art using differently different materials, Japanese Patent Publication No. 6-71441 is available. No. “Shoes” (Patent Document 5) and the like.
However, this proposal is intended to optimize the cushioning in the vertical direction exclusively, and it is assumed that the shock buffering property (especially the behavior of the buttocks) from the diagonal direction applied to the sole in the actual walking motion is assumed. It was not always satisfactory.
JP 2006-288907 A Japanese Patent Application No. 2006-49959 Japanese Patent Application No. 2006-152570 Japanese Patent Application No. 2006-243641 Japanese Patent Publication No. 6-71441

  The present invention has been made in consideration of such a background. When applied to shoes, the present invention elastically deforms the cushioning member in the surface direction of the sole against an impact from an oblique direction that acts during actual walking. In addition, based on the idea of integrating stress with the material with different elastic properties and distributing the stress in the direction of the side of the sole, it is possible to demonstrate a high level of cushioning function, and also to develop a new planar heterophasic buffer that can visually recognize its function. The technical issue is the development of shoes with materials and this flat heterophase-type cushioning material.

That is, the planar heterophasic cushioning material according to claim 1 is a solid body composed of a foam cushioning portion constituted by a material in which a rubber material is in a foamed state and a material in which the rubber material is in a solid state without being in a foamed state. The body cushioning portion is a cushioning material that is integrally combined so as to abut on the end face in the thickness direction, and the combination boundary portion has a finger joint shape that meshes with each other in plan view , and The combination boundary portion is connected so that the foam buffer portion side enters the solid buffer portion side in a plan view .
According to the present invention, it is preferable that the shock-absorbing materials that are suitable for impacts of different properties, such as an impact applied to the shoe sole (grounding location) at the time of ground contact and an impact applied to the heel at the time of ground contact, are preferably integrated. It is possible to provide a shock-absorbing effect, and further to form a finger joint, it is possible to strengthen the integrity of the joint.
Moreover, since the expansion deformation | transformation to the plane direction of a foam buffer part is controlled by the solid body buffer part located in the both sides in a combination boundary part when an impact is added, peeling of both can be prevented.

In addition to the above requirements, the planar heterophase-type cushioning material according to claim 2 is characterized in that the meshing length dimension of the combination boundary portion is not less than the thickness dimension.
According to the present invention, the integration of the foam buffer portion and the solid buffer portion can be made even stronger.

Furthermore, in addition to the above requirements, the planar heterophase-type cushioning material according to claim 3 is connected such that the foam cushioning portion side enters the solid body cushioning portion side in the thickness direction end surface of the combination boundary portion. It consists of
According to the present invention, when the impact is applied, the expansion deformation in the thickness direction of the foam cushioning portion is regulated by the solid cushioning portion positioned above and below the combined cushioning portion, thereby preventing separation of the two. be able to.

Furthermore, in addition to the above requirements, the planar heterophase-type cushioning material according to claim 4 is characterized in that the foam cushioning portion is colored and the solid cushioning portion is made transparent or translucent.
According to this invention, a combination boundary part can be visually recognized from the outside.

According to a fifth aspect of the present invention, there is provided a shoe characterized in that the sole portion is provided with the planar heterophase-type cushioning material according to the first to fourth aspects.
According to the present invention, a planar heterophasic cushioning material integrated with buffer materials suitable for shocks of different properties, such as an impact applied to a shoe sole (grounding location) at the time of ground contact and an impact applied to a heel at the time of ground contact. Thus, an advanced buffer function can be exhibited, and when a transparent material is applied as the solid body buffer portion, the function expression can be recognized visually.
The above problems can be solved by using the configuration of the invention described in each of the claims as a means.

  According to the present invention, a new planar heterophasic cushioning material that can exhibit a high level of cushioning function with a cushioning material of different properties, can also visually recognize the function expression, and further realizes weight reduction by applying foamed material. It can be provided, and further, by assembling this to a shoe, its merchantability can be enhanced.

One of the best modes of the planar heterophase-type cushioning material of the present invention is as described in the following examples. First, the planar heterophasic-type cushioning material will be described, and then a shoe including the planar heterophasic-type cushioning material. Will be described.
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 planar heterophasic cushioning material 1 of the present invention will be described. This is formed by integrating a foam cushioning portion 11 and a solid cushioning portion 12 into a desired shape. Specifically, a foam cushioning portion 11 composed of a material in which a rubber material is in a foamed state, and a solid body cushioning portion 12 composed of a material in which the rubber material is in a solid state without being foamed, It is the buffer material combined together so that it may face in the thickness direction end face.
The foam cushioning portion 11 is formed in a flat plate shape having a substantially uniform thickness as a whole, and a collar 110 is formed on a part thereof.
Further, as shown in the cross-sectional view of FIG. 1, the solid body buffer portion 12 is partly formed thick, and its rear end surface is the exposed surface 15.

And the combination boundary part 13 used as the junction part of the foam buffer part 11 and the solid body buffer part 12 is formed in the finger joint shape which both mesh | engage in planar view.
Specifically, as shown in FIG. 2, fingers 11 a and 12 a are respectively formed on the end surfaces in the thickness direction of the foam cushioning portion 11 and the solid cushioning portion 12. Is formed.
In this embodiment, the length L of the fingers 11a and 12a (the length from the apex of the fingers 11a and 12a, which are mountain-shaped portions, to the apex of the receiving portions 11b and 12b, which are valley-shaped portions). That is, the meshing length of the combination boundary portion 13 is set to be longer than the thickness dimension T of the fingers 11a and 12a.
In addition, the number of fingers 11a and 12a is appropriately selected, but by increasing the number of fingers 11a and 12a to about three and four, respectively, a sufficient contact area can be increased.

Moreover, as shown to Fig.3 (a), the said combination boundary part 13 is connected so that the foam buffer part 11 side may enter into the solid buffer part 12 side by planar view.
Here, “the foam cushioning portion 11 side enters the solid cushioning portion 12 side” means that the fingers 12a in the solid cushioning portion 12 are always located on both sides of the fingers 11a in the foam cushioning portion 11. To do.
That is, the finger 11a and the finger 12a are in a relationship of entering each other, but the finger 12a is always located on both sides of the finger 11a, while the finger 12a is the finger on the outermost row only on one side. 11a is not located. For this reason, in the planar heterophasic cushioning material 1 shown in FIGS. 1, 2, and 3, the foam cushioning portion 11 side is in a state of entering the solid cushioning portion 12, and the solid cushioning portion 12 side is It will not be in the state which entered the foam buffer part 11 side.

Here, the material of the planar heterogeneous cushioning material 1 will be described.
First, the foam cushioning portion 11 may be appropriately selected as long as good buffering properties can be obtained. For example, silicone-based (for example, CF5058 manufactured by Toray Dow Corning), urethane-based (for example, Nippon Milactone). Co., Ltd .: Miractolan E375), styrene (as an example, Asahi Kasei Chemicals Co., Ltd .: Asaprene T436), acrylic (example: Nippon Zeon Nipol AR), etc. are mixed with a foaming agent or a hollow filler, and the expansion ratio It is formed in a foamed state of about 0.1 to 2. Here, the rubber material includes a so-called gel material.
Further, as the foaming agent, a known material suitable for each rubber material is arbitrarily adopted.
Further, as the hollow filler, “Expancel (registered trademark) 551DE” manufactured by Nippon Philite Co., Ltd. is adopted, and is used at a blending ratio of about 1 to 3 parts by weight with respect to 100 parts by weight of the rubber material.
Incidentally, it is possible to adopt a technique in which a soluble material such as salt is mixed into the rubber material, and the soluble material is eluted after molding to obtain a foamed state.
In addition, although the foam buffer part 11 shall be colored by the white turbidity by foaming, the color which reflects the color of the hollow filler, or a coloring agent suitably, the usage mode of the planar heterophasic buffer material 1 and a customer's request Accordingly, the foaming density and the bubble size may be adjusted so as to have appropriate transparency.

Next, the solid buffer portion 12 may be appropriately selected as long as good buffering properties can be obtained. For example, silicone-based (CF5058 manufactured by Toray Dow Corning Co., Ltd.), urethane-based (for example, Japan Made by injection molding, extrusion molding, blow molding, etc., rubber materials such as milactone manufactured by Milactolan E375), styrene (asahi kasei chemicals manufactured by Asaprene T436 as an example), acrylic (example by Nippon Zeon Nipol AR) Hardened in a solid state. In consideration of mass productivity, it is preferable to use injection molding. Here, the rubber material includes a so-called gel material.
In addition, although the solid body buffer part 12 shall be transparent or colored so that transparency may be maintained, according to the usage mode of the plane different phase type | mold buffer material 1, and a customer's request, it colors suitably and transparency. It may be lowered. Here, coloring means not only coloring the whole material with a dye or pigment, but also a state in which a lame material is dispersed in the material.

  And in integrating the said foam buffer part 11 and the solid body buffer part 12, the method of shape | molding the foam buffer part 11 and the solid body buffer part 12 simultaneously, after shape | molding one first, to this thing Appropriate methods such as a method of molding the other so as to attach (contact), a method of individually molding both of them and then bonding them with an adhesive or the like are employed. Moreover, the said foam cushioning part 11 and the solid body buffering part 12 may be the same material, and are good also as a respectively different base material.

The planar heterogeneous cushioning material 1 of the present invention is configured as described above as an example, and a shoe 2 including the planar heterophasic cushioning material 1 will be described.
In FIG. 1, what is indicated by reference numeral 2 is a sports shoe which is an example of a shoe, and an upper 22 is assembled to a sole 21 which is a grounding member.
A receiving space 23 is formed in the vicinity of the collar portion with respect to the sole 21, and the sole 21 and the upper 22 are assembled in the receiving space 23 in a state in which the planar heterophasic cushioning material 1 is incorporated.
In addition, the planar heterophasic cushioning material 1 integrated with the shoe 2 is in a state in which the exposed surface 15 which is the rear end surface thereof is exposed.

  Such a shoe 2 has a foam cushioning portion 11 made of a cushioning material suitable for impacts of different properties, such as an impact applied to the rearmost end of the sole 21 at the time of ground contact and an impact applied to the heel at the time of ground contact. With the planar heterophasic cushioning material 1 in which the solid body buffering part 12 is integrated, an advanced cushioning function can be exhibited.

  Moreover, when a transparent material is applied as the solid body buffering part 12, it is possible to visually recognize the functional expression. That is, the contact portion between the foam cushioning portion 11 and the solid cushioning portion 12 can be visually recognized through the exposed surface 15, and the deformation behavior can be confirmed from the outside.

Furthermore, even when the foam cushioning portion 11 and the solid cushioning portion 12 are peeled off due to long-term use, this can be visually recognized.
In addition, because of the difference in distance from the exposed surface 15 to the finger 11a in the colored foam cushioning portion 11, when viewed from the exposed surface 15, the color of the foam cushioning portion 11 expresses light and shade, and thus a new decorative effect. Can be demonstrated.

  In addition, an appropriate part such as an outsole, a midsole, or an insole can be selected as an assembling part of the planar heterophase-type cushioning material 1 with respect to the sole 21. Etc.

〔An endurance test〕
Here, the result of the endurance test comparing the flat different-phase cushioning material 1 of the present invention with the planar different-phase cushioning material 1 'similar to this will be described.
First, as the flat different-phase cushioning material 1 ', as shown in FIG. 6 (a), a combination boundary portion 13' having a straight line shape is used. As a result of the test, a break occurred in the combination boundary portion 13 'after about 10,000 steps.
On the other hand, as the present invention, the planar heterogeneous cushioning material 1 shown in FIG. 2 and the planar heterophasic cushioning material 1A shown in FIG. 6B were used. The flat different-phase cushioning material 1 is in a state where the foam cushioning portion 11 side enters the solid cushioning portion 12 side. On the other hand, the planar heterophasic cushioning material 1A has a solid cushioning portion 12 side. It is in a state of entering the foam cushioning part 11 side.
Then, when the flat heterophase cushioning material 1 and the planar heterophasic cushioning material 1A were assembled to the shoe 2 and subjected to an actual wearing test, the planar heterophase cushioning material 1 and the planar heterophasic cushioning material were obtained after 10,000 steps. No break occurred in 1A.

[Other Examples]
The present invention is based on the above-described embodiment, but the following embodiment can be adopted based on the technical idea of the present invention.
First, the planar shape of the combination boundary portion 13 can take various forms as shown in FIGS.
In FIG. 3B, the width dimension of the finger 12 a in the solid body buffer portion 12 is set wider than the width dimension of the finger 11 a in the foam body buffer portion 11.
In this case, since the expansion deformation in the plane of the finger 11a is more reliably regulated by the fingers 12a located on both sides thereof, separation of both can be prevented more reliably.

  3 (c) is an embodiment in which the length of the fingers 11a and 12a on the center side is longer than the length of the fingers 11a and 12a on the outside, and the shoe 2 is bent by the press pressure. This is an effective form when the force is large at the center side.

  3 (d) is an embodiment in which the length dimension of the fingers 11a, 12a on one side is gradually made longer than the length dimension of the fingers 11a, 12a on the other side. It is a form according to the pressure generated by twisting. For the same purpose, the width dimension of the fingers 11a, 12a on one side may be set gradually wider than the width dimension of the fingers 11a, 12a on the other side.

Also, what is shown in FIG. 3 (e) is one in which the planar shapes of the fingers 11a and 12a are wave-shaped (sine curve-like).
In this case, since the stress is dispersed, peeling of the fingers 11a and 12a can be prevented more reliably.
In the case of the triangular fingers 11a and 12a shown in FIG. 3 (a) or the rectangular fingers 11a and 12a shown in FIG. 3 (b), stress concentration can be achieved by adding R to the corners. It can be avoided.

Moreover, the shape of the foam buffer part 11 and the solid body buffer part 12 can also be made into the shape which combined circular, rectangle, spindle shape, trapezoid, fan shape, or these suitably.
4 shows an embodiment in which the shapes of the foam cushioning portion 11 and the solid cushioning portion 12 are made different. First, the foam cushioning portion 11 is the same as that shown in FIG. And the width dimension of the portion between the fingers 11a is narrowed. On the other hand, about the solid body buffer part 12, the finger 12a is formed in the middle of the thickness direction. For this reason, the combination boundary portion 13 is in a state of riding on the lower protruding portion 120 of the solid body buffer portion 12.

Moreover, as shown in FIG. 5, you may make it connect the thickness direction end surface of the said combination boundary part 13 so that the foam buffer part 11 side may enter into the solid body buffer part 12 side.
When such a configuration is adopted, when the impact is applied, the expanded deformation in the thickness direction of the finger 11a in the foam cushioning portion 11 in the combination boundary portion 13 causes the fingers in the solid cushioning portion 12 located on both sides thereof. Since it is regulated by 12a, peeling of both can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a planar heterophase-type cushioning material of the present invention and a shoe incorporating the same, and a longitudinal sectional side view showing the planar heterophasic-type cushioning material. It is a disassembled perspective view which shows a planar different phase type | mold buffer material. It is a front view which shows the various Example of a planar different phase type | mold buffer material. It is a disassembled perspective view which shows the Example which varied the shape of the foam buffer part and the solid body buffer part. It is the side view, perspective view, and top view which show the other Example of a combination boundary part. It is a disassembled perspective view which shows a comparative example.

DESCRIPTION OF SYMBOLS 1 Plane-phase type | mold buffer material 11 Foam buffer part 11a Finger 11b Receiving part 110 Receptor 12 Solid body shock absorbing part 12a Finger 12b Receiving part 120 Lower protrusion part 13 Combination boundary part 15 Exposed surface 2 Shoes 21 Sole 22 Upper 23 Receiving space

Claims (5)

At the end face in the thickness direction, the foam cushioning part composed of a material made of a rubber material in a foamed state and the solid body cushioning part composed of a material made of a solid material without making the rubber material foamed The combination boundary part has a finger joint shape that meshes with each other in plan view , and the combination boundary part is a foam cushion part in plan view. A planar heterophasic cushioning material, characterized in that the sides are connected so as to enter the solid buffer part side .   The planar heterogeneous cushioning material according to claim 1, wherein a meshing length dimension of the combination boundary portion is a length greater than a thickness dimension thereof. 3. The planar heterophase-type cushioning material according to claim 1, wherein the end faces in the thickness direction of the combination boundary part are connected so that the foam cushioning part side enters the solid cushioning part side. The foam cushioning portion colored, claim 1 is transparent or a solid body buffer unit, characterized in that a translucent, 2 or 3 plane different phase type cushioning material according. Footwear, characterized in that the flat heterophasic type cushioning material of claims 1 to 4, wherein equipped to sole portion.

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