JP2007089734A - Cushioning structure of sole, its manufacturing method and design method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cushioning structure of a sole facilitating a design arbitrarily disposing members having necessary functions to respective portions of the sole by considering an application, a concept and cost of a shoe. <P>SOLUTION: This cushioning structure of the sole is provided with a resin base plate 1 covering at least parts of a middle foot part M and a back foot part B for supporting the middle foot part M and the back foot part B, and a plurality of cushioning modules 2<SB>1</SB>-2<SB>4</SB>disposed under the base plate 1 and formed into separate bodies mutually. The base plate 1 has positioning elements for positioning the respective cushioning modules 2<SB>1</SB>-2<SB>4</SB>. Each cushioning module 2<SB>1</SB>-2<SB>4</SB>is provided with: a cushioning element 20 having a part projecting downward from the lower face of the base plate 1 and absorbing the landing impact; an outer sole 25 joined with the lower face of the cushioning element 20 and grounding on a road surface; and an element to be positioned for making each cushioning module 2<SB>1</SB>-2<SB>4</SB>to be positioned by the positioning element. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a shoe cushioning structure, a manufacturing method thereof, and a designing method thereof.

  In addition to being lightweight, the shoe sole is required to have various functions such as a stable function for holding the foot in a stable state and a buffer function for absorbing and relaxing the impact of landing. Of these, the functions that are emphasized differ depending on the application, the sole part, etc., but in particular, the rear foot part differs depending on the part of the sole, so that it is desired to design the sole so that it can be appropriately handled. .

Examples of shoe soles with improved stability and buffer functions include the following patent documents.
JP-A-9-285304 U. S. P. 6,694,642 U. S. P. 6,915,596

Patent Document 1 discloses a shoe sole having a columnar or wall-shaped buffer portion and a plate-like dispersion portion disposed on the buffer portion. However, this document does not disclose that the function is designed to be different depending on the part of the shoe sole.
Patent Document 2 discloses a shoe sole structure in which a buffer unit including upper and lower plates and a stabilizing pod is disposed under a midsole. However, in this shoe sole, since only one buffer unit in which the stabilization pod is sandwiched between the upper and lower plates is arranged in the rear foot portion, it is difficult to change the design, and therefore, the function depends on the part of the shoe sole. However, it is difficult to design with different values.
Patent Document 3 discloses a shoe in which a buffer member having a plurality of protrusions is fitted into a plate having a plurality of openings. However, in this shoe sole, since the buffer member is integrally formed and the volume of the portion above the plate is large, it is difficult to design the function different depending on the portion of the shoe sole.

  Accordingly, an object of the present invention is to provide a shoe sole cushioning structure capable of easily designing a member having a necessary function in each part of the shoe sole in consideration of the use, concept, cost, etc. of the shoe. Is to provide.

  A cushioning structure for a shoe sole according to an aspect of the present invention includes a base plate made of resin that covers at least a part of the middle foot portion and the rear foot portion so as to support the middle foot portion and the rear foot portion, and at least of the base plate. A plurality of shock-absorbing modules formed separately from each other, wherein the base plate is formed continuously at a substantially U-shaped portion along the periphery of the rear foot, and The base plate has a positioning element for positioning the buffer modules in both the foot length direction and the foot width direction, and each of the buffer modules includes: the base plate A shock-absorbing element that has a portion that projects downward from the lower surface of the shock absorber and absorbs the impact of landing; an outer sole that is joined to the lower surface of the shock-absorbing element and contacts the road surface A positioning element for positioning each buffer module in both the foot length direction and the foot width direction by the positioning element, and the buffer module causes the buffer module to be It is positioned and arranged at a predetermined position, at least a part of the top surface of each buffer module is fixed to the lower surface of the base plate, and at least two or more buffer modules are disposed on the rear foot. The buffer element of the rear foot buffer module is formed in a leg shape, and the rear foot buffer module is arranged essentially separated at least in the front and rear and / or inside and outside, There is no portion protruding above the lower surface of the base plate in each cushioning element of the rear foot, or the base The volume of the portion protruding below the lower surface of the plate is set to be larger than the volume of the portion protruding upward from the lower surface of the base plate.

  According to this shock absorber, a plurality of shock absorbing modules having different functions or characteristics are fixed to the base plate, so that a shock absorbing structure for a shoe sole having a necessary function according to a portion of the shoe sole can be easily realized. it can. In addition, the design can be easily changed by replacing individual buffer modules. Note that “adhesion” includes welding in addition to adhesion.

  As the base plate, for example, non-foamed resin such as nylon, polyurethane, and FRP can be used, and EVA (ethylene-vinyl acetate copolymer) having high hardness can be used. The base plate does not necessarily need to be integrally molded, but preferably includes at least a non-foamed body of resin in order to ensure a predetermined rigidity so that the sole can be stably held. By securing rigidity, it becomes easy to change the structure other than the base plate

On the other hand, as a cushioning element, for example, a resin foam such as EVA or polyurethane, a material suitable for shock absorption such as a so-called gel can be used, and a coil spring or a non-foamed resin leaf spring structure can be used. It may be used as a buffer element. A combination of these materials and structures may be used as a buffer element.
In consideration of the adhesiveness between the buffer element and the base plate, both of them may be made of the same material having the same main component such as urethane, styrene, olefin, and ethylene vinyl acetate.

  The phrase “disposed at least essentially in front and rear and / or inside and outside” means that a plurality of buffer modules formed separately from each other are arranged side by side in the front and back and / or inside and outside. This includes not only the case where the respective buffer modules of the foot are disposed apart from each other but also the case where they are disposed in contact with each other.

  As the positioning element, for example, an opening or a concave portion of a base plate can be provided, and as the positioned element, for example, a convex portion that can be engaged with the opening or the concave portion can be provided in a buffer element. In this case, each said buffer module is positioned by the baseplate because the said convex part is fitted in the said opening or recessed part from the lower surface side.

When performing such positioning, a substantially flat flat surface is formed on the lower surface of the base plate around the opening or the concave portion, and a portion around the convex portion of the buffer element is formed on the flat surface of the base plate. It is preferable that the buffer modules are fixed to the base plate in close contact with each other.
With this structure, the buffer module is more firmly fixed to the base plate, so that the buffer module is hardly peeled off from the base plate.

  From the viewpoint of fixing strength, the buffer element of the buffer module has a plurality of convex portions as the positioned element, and the base plate is a positioning element for positioning the buffer module including the plurality of convex portions. As above, a plurality of openings or recesses that can be engaged with the plurality of projections may be provided. In this case, the plurality of convex portions are fitted into the plurality of openings or concave portions, whereby the buffer module including the plurality of convex portions is positioned on the base plate.

In the shoe sole of the present invention, it is preferable that the bending rigidity per unit width in the foot width direction at the middle foot portion of the base plate is set larger than that at the rear foot portion of the base plate.
With this setting, the midfoot portion can be reinforced to improve the bending or twisting suppression function of the midfoot portion. Such setting can be realized by providing a winding part inside or outside the base plate in the middle foot part or increasing the thickness of the base plate. The “bending rigidity per unit width in the foot width direction” is a value obtained by dividing the bending rigidity of the base plate by the length of the base plate in the foot width direction in plan view.

Embodiments of the present invention will be described below with reference to the drawings.
First embodiment :
1 to 3 show a first embodiment.
As shown in FIG. 1, the shoe sole of this embodiment includes a substantially plate-like base plate 1 and first to fourth buffer modules 2 ₁ , 2 that are arranged below the base plate 1 and formed separately from each other. ₂ , 2 ₃ , 2 ₄ . Each of the buffer modules 2 _{1 to} 2 ₄ includes a buffer element 20 that absorbs an impact at the time of landing, and an outer sole 25 joined to the lower surface of the buffer element 20.

The base plate 1 is made of an integrally molded non-foamed resin, extends from the rear end of the rear foot portion to the front end of the front foot portion, and supports substantially the entire sole. In the middle foot portion, middle foot winding upper portions 18, 18 that wind upward are provided inside and outside the base plate 1. Further, the base plate 1, except that opening 11a~14a for positioning each buffer module ₂₁ to ₂₄ is provided, an opening 15a is provided in the center of the rear foot portion. In FIG. 2B, in order to make the shape of the base plate 1 easy to understand, a halftone dot is given to the base plate 1 (the same applies to FIG. 11B described later).

The cushioning element 20 is made of a material suitable for shock absorption, such as a foam of resin such as EVA or polyurethane. Each buffer element 20 is provided with a first winding upper portion 24 that winds upward on the outside of the base plate 1. Accordingly, the feet are stably supported, and the buffer modules 2 ₁ to 2 ₄ are not easily displaced with respect to the base plate 1.
The outer sole 25 is grounded to a road surface or a floor surface and is formed of a material having high wear resistance.

  As shown in the plan view of FIG. 2B, the base plate 1 is formed continuously at a substantially U-shaped portion along the periphery of the rear foot B, and in the middle foot M in the width direction of the foot. It is formed continuously. Therefore, the base plate 1 is provided with a loop-shaped portion from the rear foot B to the middle foot M. With this configuration, it is possible to prevent inadvertent bending from the rear foot portion B to the middle foot portion M, and a predetermined rigidity is ensured.

The base plate 1 is provided over substantially the entire sole. By doing so, it is possible to suppress partial or extreme bending or twisting of the base plate 1. By suppressing the extreme deformation of the sole, the inconvenience that the center of gravity of the body at the time of contact with the shoe sole cannot move smoothly is less likely to occur.
In particular, the base plate 1 is provided from the front part of the forefoot MP joint to the rear end of the rear foot part, thereby suppressing extreme bending and twisting of the front foot part. In addition, since the base plate 1 is provided up to the heel, the heel portion can be stably maintained.
From the viewpoint of smooth movement of the body center of gravity, it may be set to increase the bending rigidity in the locus direction according to the locus of the body center of gravity (from the outer side of the heel to the toe).

Of the _four buffer modules 2 ₁ to 2 ₄ , the first buffer module 2 ₁ is disposed inside the front portion of the rear foot B, and the second buffer module 2 ₂ is disposed outside the front portion of the rear foot B. is, the third buffer module 2 ₃ is located at the rear of the rear foot portion B, the fourth buffer module 2 ₄ is disposed in forefoot F. Thus, in the rear foot section B, the first buffer module 2 ₁ and the second buffer module 2 ₂ are disposed are essentially separated out from each other, first and second buffer module 2 _1, 2 ₂ and the third buffer module 2 ₃ are arranged to be essentially separated back and forth. Such a separation of the buffer module is particularly useful in the rear foot portion in which the functions required for front and rear and inside and outside are different.
In the present embodiment, the first to third modules 2 ₁ to 2 ₃ are disposed apart from each other, but may be disposed in contact with each other as shown in FIGS. 10A and 10B.

In addition, in the middle foot M, the buffer module is not substantially disposed. For this reason, the first to third buffer modules 2 ₁ to 2 ₃ of the rear foot B and the _first foot F 4 the buffer module 2 _4, are substantially decoupled from each other. This is because the midfoot part M does not require a buffer function as much as possible, and is intended to reduce the weight.
In the middle foot portion M, a resin foam (midsole) having a surface shape along the arch of the foot may be laminated on the upper surface of the base plate 1. Further, a reinforcing member may be provided below the base plate 1.

As shown in FIGS. 2A and 2B, the first to third buffer module 2 ₁ to 2 ₃ of the damping element 20 is formed in a leg shape, a fourth buffer module 2 ₄ is formed in a thick plate . In each of the buffer modules 2 _{1 to} 2 ₄ , the buffer element 20 has a portion 20 a that projects downward from the lower surface 16 of the base plate.

As shown in FIGS. 3A to 3C, in each of the buffer modules 2 ₁ to 2 ₄ , a convex portion 23 that protrudes upward is provided on the upper surface of the buffer element 20. The projections 23 are fitted into the openings 11a to 14a of the base plate 1 from below so that the buffer modules 2 ₁ to 2 ₄ are positioned at predetermined positions on the base plate 1 in the foot length direction X and the foot width direction. Positioned and fixed to Y. In FIGS. 1 and 6 to 9, a cross (X) is shown on the upper surface of the convex portion 23 in order to clarify the position of the convex portion 23.

In this anchoring structure, the top surface of each of the buffer modules ₂₁ to _24, that is, the top surface 21 portion of the damping element 20 (portions other than the convex portion 23) is fixed to the lower surface 16 of the base plate 1 . The fixing of the top surface 21 makes it difficult for the buffer modules 2 ₁ to 2 ₄ to be peeled off from the base plate 1 and to make the positional displacement difficult.
Further, a substantially flat flat surface 17 is provided around the openings 11 a to 14 a on the lower surface 16 of the base plate 1, and the peripheral portion of the convex portion of the top surface 21 of the buffer element 20 is provided on the flat surface 17. The respective buffer modules 2 ₁ to 2 ₄ are fixed in a state where 21a is in close contact therewith. Thereby, the adhering force is further improved.

Incidentally, as shown in FIG. 1, the third buffer module 2 ₃ damping element 20, two convex portions 23, 23 are provided, two of the convex portions 23, 23 is fitted to the base plate 1 Openings 13a and 13a are provided. Thus, the fixing force is improved by one buffer module engaging with the base plate at a plurality of locations. Such structures are formed from the inside of the foot along the periphery of the foot in an arc or semicircular over the outer, in a third fixation buffer module 2 ₃ hindfoot rear end, it is particularly useful.

From the viewpoint of adhesion strength, the entire base plate 1 is fixed to the upper (not shown), preferably the top surface of ₂₁ to ₂₄ of the buffer module is secured to the upper.

  In each cushioning element 20 of the rear foot B, the volume of the lower protruding portion 20a protruding downward from the lower surface 16 of the base plate is a portion protruding upward from the lower surface 16 of the base plate, that is, the convex portion 23 and the winding. It is set larger than the volume of the upper part 24.

In this embodiment, as a positioning element for positioning the buffer module ₂₁ to _24, although the opening 11a~14a provided on the base plate 1, instead of such openings, recesses 11b~ as in FIG 4A~C 14b may be provided. The buffer modules 2 ₁ to 2 ₄ are positioned by fitting the convex portions 23 of the buffer elements 20 into the recesses 11b to 14b. 4A to 4C are cross-sectional views of the shoe sole provided with the recess 23 at the same positions as those in FIGS.

Second embodiment :
5A to 5D show a second embodiment. In the following embodiments, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
As shown in FIGS. 5B to 5D, in the present embodiment, a second winding upper portion 19 that is wound upward is provided on the periphery of the base plate 1 at the front foot portion and the rear foot portion. The second winding upper part 19 and the middle leg winding upper part 18 wind up substantially the entire periphery of the base plate.
The second volume upper portion 19 is wound upward along the first volume upper portion 24 inside the first volume upper portion 24 of the cushioning element 20. Such winding increases the rigidity of the base plate 1 and further improves the stability.

Further, as shown in FIG. 5A, the boundary line between the first and second buffer modules 2 ₁ and 2 ₂ and the third buffer module 2 ₃ is straight in the rear foot portion as in the first embodiment. It is not a straight line, but a straight line that is bent at the center of the rear foot. That is, in the rear foot portion provided with the buffer module 2 _i, as a straight line across the foot to the foot width direction and obliquely crosses one of the buffer module 2 _i, the buffer module 2 _i shape, size, The arrangement is set.
By setting in this way, it is possible to prevent the shoe sole from being bent inadvertently at the boundary line of the rear foot B, and stability is improved.

Third embodiment :
FIG. 6 shows a third embodiment.
In this embodiment, in the base plate 1, the middle leg winding upper part is not provided, and the second winding upper part 19 is provided only in the rear leg part. The second winding upper portion 19 extends largely upward from the top of the first winding upper portion 24 of the buffer element 20, and can function as a so-called heel counter.
As shown in FIG. 7, the second winding upper portion 19 may be wound up continuously from the middle foot portion, and a notch portion 19 a notched in a substantially U shape is formed in the upper portion on the rear side of the heel. It may be provided.

Fourth embodiment :
8 and 9 show a fourth embodiment.
In this embodiment, the base plate 1 is provided with a large number of holes 11c to 14c. By providing a large number of holes as described above, the base plate 1 can be reduced in weight. Moreover, the shape and number of each buffer module 2 _i joined to the base plate 1 can be significantly changed.

On the other hand, the damping element 20 of the buffer module ₂₁ to _24, which is disposed below the base plate 1, corresponding to the plurality of holes 11C to 14C, a plurality of protrusions 23 are provided. A plurality of protrusions 23 of the buffer module ₂₁ to _24, respectively, that fit into a plurality of holes 11c~14c of the base plate 1, the buffer module ₂₁ to ₂₄ is positioned on the base plate 1 . The plurality of convex portions 23 do not have to be provided so as to be engaged with all the holes in the portions where the respective buffer modules 2 ₁ to 2 ₄ are disposed, and one or more selected from the plurality of holes are provided. What is necessary is just to be provided so that it may engage with this hole. Therefore, for the base plate 1 of the present embodiment, various buffer modules can be formed by changing the portions where the convex portions 23 are provided.

Example 5 :
11A to 11C show a fifth embodiment.
In this embodiment, a resin non-foamed reinforcing member 40 (indicated by a two-dot chain line) is provided below the base plate 1 at a portion from the rear end portion of the front foot portion to the front end portion of the rear foot portion through the middle foot portion. Is provided).
The reinforcing member 40 is essentially spaced apart from the base plate 1 in the middle foot portion. FIG. 11A, as shown in FIG. 11C, the front end portion 40f of the reinforcing member 40 in the first step portion 51 of the damping element 20 of the fourth buffer module 2 ₄ at the rear end side of the forefoot (an example of the first junction) It is joined (inserted). The rear end portion 40b of the reinforcing member 40 is divided into inner and outer, respectively, at the front end side of the rear foot portion, the second step portion 52 of the second buffer module 2 ₂ buffer elements 20, the first buffer module 2 ₁ buffer It is joined to (inserted into) the second step 52 of the element 20. The front end portion 40f and the rear end portion 40b are sandwiched between the cushioning element 20 and the outer sole 25. The front end portion 40 f and the rear end portion 40 b of the reinforcing member 40 may be joined to the base plate 1.
In this way, by disposing the base plate 1 and the reinforcing member in the middle foot portion in a state of being spaced apart from each other, the middle foot portion of the shoe sole is reinforced and the bending rigidity is increased. While mitigating, bending and twisting of the midfoot are suppressed.

In each of the above-described embodiments, the base plate 1 extends from the front foot portion to the rear foot portion, but the base plate 1 does not necessarily extend to the front foot portion. For example, as shown in FIG. 10C, the base plate 1 may be provided so as to extend only from the middle foot portion to the rear foot portion without being provided on the front foot portion. Further, as shown in FIG. 10D, the base plate 1 may be provided only from the site in the vicinity of the MP joint of the front foot portion to the rear end of the rear foot portion. In these cases, no buffer module is disposed on the forefoot.
Further, another buffer element 31 (midsole) may be disposed on the base plate 1, and the other buffer element 31 may be provided so as to extend from the front foot portion to the rear foot portion as shown in FIG. 10C. Alternatively, it may be provided only on the forefoot as shown in FIG. 10D.

Manufacturing method :
Next, an example of a method for manufacturing the shoe sole of each of the embodiments will be described.
First, (1) an opening (for example, 11a to 13a in FIG. 1) or a recess (for example, FIG. 1) at a position outside the front part of the rear foot part, a position inside the front part of the rear foot part, and a position at the rear part of the rear foot part. A plurality of types of base plates having 4A to C 11b to 13b), and (2) a plurality of types of first buffer modules having convex portions that can be fitted into openings or concave portions at positions outside the front portion of the rear foot portion, (3 ) A plurality of types of second buffer modules having convex portions that can be fitted into openings or concave portions at positions inside the front portion of the rear foot portion; and (4) fit into openings or concave portions at the rear portion of the rear foot portion. A plurality of types of third buffer modules having convex portions are prepared in advance.

  As the plurality of types of base plates, for example, base plates of types I to VII shown in FIG. 13B can be employed. That is, each buffer module includes I.I. A non-foamed resin plate (for example, base plate 1 in FIG. 1) having windings only on the middle foot, II. A non-foamed resin plate having windings around its entire periphery (eg, base plate 1 of FIGS. 5A-5C), III. A non-foamed resin plate (for example, the base plate 1 in FIG. 6) having windings only on the hind legs, IV. A non-foamed resin plate (for example, base plate 1 in FIG. 7) having a winding from the middle foot portion to the rear foot portion; A non-foamed resin plate (for example, the base plate 1 in FIG. 8) without winding and provided with a large number of holes, VI. A plate of foamed resin (eg, EVA foam) with a film laminated on the surface, VII. Plural types of modules such as plates made only of foamed resin are prepared. Each type of base plate has an opening or a recess that can be engaged with the protrusion of the buffer module.

  As the plurality of types of first to third buffer modules, for example, types I to V modules shown in FIG. 13A can be employed. That is, each buffer module includes I.I. High hardness EVA foam, II. Low hardness EVA foam, III. EVA foam with gel, IV. Coil spring, V. Plural types of modules such as a leaf spring structure made of non-foamed resin are prepared. Each type of buffer module has a convex portion protruding upward.

  As the EVA foam containing the gel, PCT / JP2005 / 8778 FIG. 7 in which a columnar gel is inserted in the center of the EVA foam. Examples of the leaf spring structure made of the non-foamed resin include a non-foamed resin formed into a tube shape as shown in FIG. 3 of the same application, and a substantially U-shaped cross section as shown in FIGS. A non-foamed resin molded in a substantially V shape can be used.

  Next, a desired base plate is selected from the prepared plurality of types of base plates, and a desired first to third buffer module is selected from the prepared plurality of types of first to third buffer modules. . These selections can be determined in consideration of various functions such as functions necessary for each part of the hind leg, weight, and cost. For example, when the importance is placed on the need for a high shock-absorbing property because the outside of the rear foot portion of the foot receives a large impact at the time of landing, as the second buffer module, a low-hardness EVA foam or a gel-filled EVA foam If the emphasis is on suppressing the falling into the inside of the foot, the EVA foam having high hardness can be selected as the first buffer module. Moreover, when importance is attached to resilience, the coil spring or the leaf spring structure can be selected.

  Then, the convex portions of the selected first to third buffer modules are respectively formed as openings or concave portions at positions outside the front portion of the rear foot portion of the selected base plate, and openings at positions inside the front portion of the rear foot portion. Alternatively, each buffer module is positioned and fixed on the base plate by being fitted into an opening or recess at the position of the rear portion of the recess or the rear foot portion. In this way, the shoe sole of the embodiment is completed.

By employing such a manufacturing method, it is possible to easily manufacture a shoe sole having a desired function at each part of the shoe sole. Also, by preparing and selecting a plurality of types of base plates according to the size and application of the foot, it is possible to easily manufacture a plurality of types of shoe soles having different foot sizes and applications.
Note that a plurality of types of the fourth buffer module in the forefoot may be prepared in advance, and may be selected and fixed. Alternatively, only one type of base plate may be prepared and only the buffer module may be selected. Only the base plate may be selected using the same combination of buffer modules.

In addition, when manufacturing a shoe sole in which a reinforcing member is provided on the middle foot as in the fifth embodiment, in addition to the base plate and the plurality of buffer modules as described in (1) to (4) above, A manufacturing method of preparing a plurality of types of reinforcing members in advance can be employed.
In this case, as a buffer module arranged in the forefoot part, a buffer module having a first step part (for example, 51 in FIG. 11A) to which the front end part of each reinforcing member can be joined is prepared, and the rear foot part is provided. As the buffer module to be arranged, a buffer module having a second step portion (for example, 52 in FIG. 11A) capable of joining the rear end portion of each reinforcing member is prepared. On the other hand, as the plurality of types of reinforcing members, a reinforcing member having a shape in which a front end portion can be joined to the first step portion and a rear end portion can be joined to the second step portion is prepared.

  For example, in the shoe sole shown in (k) of FIG. 12, a first step portion 51 is provided on the rear end side of the cushioning element 20 of the front foot cushioning module 2, and A second step portion 52 is provided on the front end side of the cushioning element 20. 12A and 12J can be joined to the buffer modules 2 and 2 (types a to j shown in FIG. 13C). Each of these reinforcing members 40 has a shape along the first step portion 51, that is, a front end portion 40f that can be joined to the first step portion 51 and a shape along the second step portion 52, that is, And a rear end portion 40b that can be joined to the second step portion 52. Therefore, when the buffer modules 2 and 2 in FIG. 12K are employed, the reinforcing members 40 in FIGS. 12A to 12J can be employed as the plurality of types of reinforcing members. The reinforcing members 40 in FIGS. 12A to 12J are all made of non-foamed resin and have the functions and characteristics shown in the diagram of FIG. 13C.

  Next, a desired reinforcing member is selected from the prepared multiple types of reinforcing members. In this selection, a material having an appropriate shape, size, material, and the like can be appropriately selected according to the function and purpose of the reinforcing member. If importance is attached to suppressing both bending and external torsion and strengthening both the inside and outside, an N-type reinforcing member in plan view in FIG. 12C can be selected.

And while joining the front end part 40f of the reinforcement member 40 selected from (a)-(j) of FIG. 12 to the 1st step part 51 ((k) of FIG. 12) of the buffer module 2 of a front foot part. The rear end portion 40b is joined to the second joint portion 52 ((k) in FIG. 12) of the buffer module 2 at the rear foot portion. At this time, the front end portion 40f and the rear end portion 40b may be sandwiched and fixed between the buffer element 20 and the outer sole.
Then, the buffer modules 2 and 2 to which the reinforcing members 40 are joined are positioned and fixed on the base plate in the same manner as in the manufacturing method described above. In this manner, for example, a shoe sole provided with a reinforcing member as shown in FIG.

  By adopting such a manufacturing method in which a plurality of types of reinforcing members are prepared in advance, it is possible to easily manufacture a shoe sole in which a desired function is provided to the middle foot portion of the shoe sole. Note that the plurality of types of reinforcing members may be other than those shown in FIGS. 12A to 12J, and are a plan view λ type, a plan view V type, a plan view X type, and a plan view H. Various shapes such as a mold, a plan view N type, a plan view I type, a plan view Y type, a plan view III type, and a plan view 8 type can be used as appropriate.

Design method :
Next, an example of the shoe sole design method of each of the embodiments will be described.
At least one buffer module is selected from the first to fourth buffer modules of the first sole designed as in the above embodiment. Then, instead of the selected buffer module, another buffer module having a convex portion corresponding to the concave portion or opening of the selected buffer module position is designed to be arranged at the position of the selected buffer module. Thus, a new second shoe sole is designed. In this second shoe sole design, the same base plate as the first shoe sole is used as the base plate, and the buffer module that is not selected uses the same buffer module as the first shoe sole. That is, in the second shoe sole, the same components as those of the first shoe sole are used for parts other than the selected buffer module.

  With such a design method for changing the buffer module, the design of the shoe sole can be changed simply by creating another buffer module having the same protrusion as the buffer module to be changed using the same plate. Further, since the design of the shoe sole can be changed by creating not only the buffer module prepared in advance in the manufacturing method but also a buffer module made of another material or structure, the degree of freedom in design is increased.

In addition, the shoe sole may be designed by changing the base plate.
In this case, instead of the base plate of the first shoe sole designed as in the embodiment, the plurality of buffer modules are provided on another base plate having openings or recesses corresponding to the convex portions of the plurality of buffer modules. The second shoe sole is designed by designing so as to be arranged. In the design of the second shoe sole, a buffer module having the same combination as the first shoe sole is used as the buffer module.
For example, in the shoe sole (FIG. 1) of the first embodiment, the base plate 1 is replaced with the third embodiment (FIG. 6) or the fourth embodiment without changing the _first to _fourth buffer modules 2 ₁ to 2 ₄ . If it changes to the thing of (FIG. 7), the shoe sole of the 3rd, 4th Example can be designed.

  By such a design method for changing the base plate, the design of the shoe sole can be changed by using another buffer module of the same combination and creating another plate having an opening or a recess corresponding to the buffer module of the combination. Further, since the design of the shoe sole can be changed by creating not only the base plate prepared in advance in the manufacturing method but also a base plate made of another material or structure, the degree of freedom in design increases.

In the case of a shoe sole designed by arranging the reinforcing member below the base plate, the shoe sole may be designed by changing the reinforcing member.
In this case, for example, instead of the reinforcing member of the first shoe sole designed as in the fifth embodiment, the front end portion that can be joined to the first step portion of the buffer module and the second of the buffer module. The second sole is designed by designing another reinforcing member having a rear end portion that can be joined to the stepped portion to be disposed below the base plate. In the second shoe sole, the same buffer module and base plate as those of the first shoe sole are used as the buffer module and the base plate.
For example, in the shoe sole of FIG. 12 (k), the reinforcing member 40 of FIG. 12 (c) is disposed. Instead of the reinforcing member 40, the first step portion 51 of the shock absorbing module 2 of the front foot portion. Another reinforcing member 40 having a front end portion that can be joined to the rear end portion and a rear end portion 40b that can be joined to the second joint portion 52 of the shock absorbing module of the rear foot portion (FIGS. By designing (j)) to be arranged below the base plate, the second shoe sole can be designed.

  By using the same base plate and the buffer module, another reinforcing member having a front end portion and a rear end portion corresponding to the first and second step portions of the buffer module is created by the design method for changing the reinforcing member. You can change the design of the sole. Further, since the design of the shoe sole can be changed by creating not only the reinforcing member prepared in advance in the manufacturing method but also a reinforcing member made of another material or structure, the degree of freedom in design is increased.

As described above, the preferred embodiments have been described with reference to the drawings. However, those skilled in the art will readily understand various changes and modifications within the obvious scope by looking at the present specification.
For example, in each of the embodiments described above, three buffer modules are provided in the rear foot, but the number of buffer modules in the rear foot may be four or more, or two. Two or more buffer modules for the forefoot may be used.
The base plate may be composed of two or more members.
Accordingly, such changes and modifications are to be construed as within the scope of the invention as defined by the claims.

  The present invention can be applied to the soles of various shoes such as athletic shoes.

It is the perspective view seen from the upper surface side of the shoe sole concerning 1st Example of this invention. A is an inner side view of the shoe sole, B is a plan view thereof, and C is an outer side view thereof. 2A is a sectional view taken along line IIIa-IIIa in FIG. 2B, FIG. 2B is a sectional view taken along line IIIb-IIIb in FIG. 2B, and FIG. 3C is a sectional view taken along line IIIc-IIIc in FIG. A, B, and C are sectional views of a modified shoe sole. A is a plan view of a shoe sole according to a second embodiment of the present invention, B is a cross-sectional view taken along line Vb-Vb in FIG. 5A, C is a cross-sectional view taken along line Vc-Vc in FIG. 5A, and D is a Vd-Vd line in FIG. It is sectional drawing. It is the perspective view seen from the upper surface side of the shoe sole concerning 3rd Example of this invention. It is the perspective view seen from the upper surface side of the shoe sole of a modification. It is the perspective view seen from the upper surface side of the shoe sole concerning 4th Example of this invention. It is a top view of the shoe sole. A is a partial plan view of a buffer module of a rear foot portion of a shoe sole according to a modification, B is a partial outer side view of the same, and C and D are outer side views showing another modification. A is an inner side view of a shoe sole according to a fifth embodiment of the present invention, B is a plan view thereof, and C is an outer side view thereof. (A)-(j) is a bottom view which shows the example of a reinforcement member, (k) is a bottom view of the shoe sole of the state which removed the outer sole. A is a chart showing types of buffer modules, B is a chart showing types of base plates, and C is a chart showing types of reinforcing members.

Explanation of symbols

1: Base plate 11a, 12a, 13a, 14a: Opening 11b, 12b, 13b, 14b: Recess 11c, 12c, 13c, 14c: Hole 16: Lower surface 17: Flat surface 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ : Buffer Module 20: shock absorbing element 20a: downward projecting portion 21: top surface 23: convex portion 25: outer sole 40: reinforcing member 40f: front end portion 40b: rear end portion 51: first step portion (first joint portion)
52: 2nd step part (2nd junction part)
F: Forefoot part M: Middle foot part B: Rear foot part X: Foot length direction Y: Foot width direction

Claims (19)

The sole cushioning structure,
A base plate made of resin that covers at least a part of the middle foot portion and the rear foot portion so as to support the middle foot portion and the rear foot portion;
A plurality of buffer modules disposed at least below the base plate and formed separately from each other;
The base plate is formed continuously at a substantially U-shaped portion along the periphery of the rear foot, and is formed continuously in the foot width direction at the middle foot,
The base plate has positioning elements for positioning the buffer modules in both the foot length direction and the foot width direction,
Each of the buffer modules is:
A cushioning element having a portion projecting downward from the lower surface of the base plate and absorbing a landing impact;
An outer sole joined to the lower surface of the buffer element and grounded to the road surface;
A positioned element for positioning each of the buffer modules in both the foot length direction and the foot width direction by the positioning element;
Each of the buffer modules is positioned and arranged at a predetermined position of the base plate by the positioning element and the positioned element,
At least a part of the top surface of each buffer module is fixed to the lower surface of the base plate,
At least two or more of the buffer modules are arranged on the rear foot, and the buffer element of the buffer module of the rear foot is formed in a leg shape,
The rear foot cushioning module is at least essentially separated from the front and rear and / or inside and outside,
There is no portion protruding above the lower surface of the base plate in each cushioning element of the rear foot, or the volume of the portion protruding downward from the lower surface of the base plate protrudes higher than the lower surface of the base plate Shoe cushioning structure that is set larger than the volume of the part.   4. The shoe sole cushioning structure according to claim 1, wherein the base plate includes a resin non-foam plate.   3. The shoe sole cushioning structure according to claim 1 or 2, wherein the base plate is provided from at least a portion of the front foot portion near the MP joint to a rear end of the rear foot portion. In Claim 1 or 2, an opening or a recess is provided in the base plate as the positioning element,
As the positioned element, each buffer element is provided with a convex portion that can be engaged with the opening or the concave portion,
A shoe cushioning structure in which each of the cushioning modules is fixed in a predetermined position of the base plate by fitting the convex part into the opening or the concave part from the lower surface side. In claim 4, a substantially flat flat surface is formed around the opening or the recess on the lower surface of the base plate.
A shoe cushioning structure in which each buffer module is fixed to the base plate in a state in which a peripheral portion of the convex portion of the buffer element is in close contact with the flat surface of the base plate.   The shoe sole according to any one of claims 1 to 5, wherein a bending rigidity per unit width in a foot width direction in a middle foot portion of the base plate is set to be larger than that in a rear foot portion of the base plate. Buffer structure. In Claim 1 or 2, the base plate is integrally formed and extends from the front foot portion to the rear foot portion,
The plurality of buffer modules are disposed on the front foot portion and the rear foot portion,
In the middle foot portion, the buffer element is not substantially disposed below the base plate,
Thereby, the shock absorbing structure of the shoe sole in which the shock absorbing module of the rear foot and the shock absorbing module of the front foot are substantially separated from each other. The sole cushioning structure,
A base plate made of resin that covers at least a part of the middle foot portion and the rear foot portion so as to support the middle foot portion and the rear foot portion;
A plurality of buffer modules disposed at least below the base plate and formed separately from each other;
The base plate has positioning elements for positioning the buffer modules;
Each of the buffer modules is:
A cushioning element having a portion projecting downward from the lower surface of the base plate and absorbing a landing impact;
An outer sole joined to the lower surface of the buffer element and grounded to the road surface;
A positioned element for positioning each of the buffer modules by the positioning element;
The shoe cushioning structure in which each of the cushioning modules is positioned and arranged at a predetermined position of the base plate by the positioning element and the positioned element. In Claim 1 or 8, the buffer element of at least one said buffer module has a plurality of convex parts as said positioned element,
The base plate has a plurality of openings or recesses as positioning elements for positioning the buffer module including the plurality of projections,
The shoe cushioning structure in which the buffer module including the plurality of convex portions is positioned and arranged at a predetermined position of the base plate by fitting the plurality of convex portions into the plurality of openings or concave portions. . 9. The base plate according to claim 1, wherein the base plate includes a resin non-foam plate,
A shoe cushioning structure in which a non-foam plate of the resin is provided at least from a front part of an MP joint of a front foot part to a rear end of a rear foot part. In claim 10, at least in the region including the middle foot portion, a resin non-foam reinforcing member that suppresses bending or twisting of the middle foot portion is provided below the base plate,
A shoe sole cushioning structure in which at least a part of the reinforcing member is arranged to be essentially vertically separated from the base plate in the middle foot portion. In claim 8,
In at least a portion including the middle foot portion, a reinforcing member that suppresses bending or twisting of the middle foot portion is provided below the base plate, and the reinforcing member has a front end portion and a rear end portion,
Any one of the plurality of buffer modules is provided with a first joint for joining the front end,
Any one of the plurality of buffer modules is provided with a second joint portion for joining the rear end portion,
A shoe sole cushioning structure wherein the front end is joined to the first joint and the rear end is joined to the second joint. A method for manufacturing a shoe sole comprising the buffer structure according to claim 8,
A base plate having first and second positions and first and second positioning elements corresponding to each of the positions; and capable of being joined to the first position of the base plate and by the first positioning element A plurality of types of first buffer modules having a first positioned element to be positioned at the first position; the second positioning element being connectable to the second position of the base plate; Preparing in advance a plurality of types of second buffer modules having a second positioned element for positioning at the second position by:
A desired first buffer module is selected from the plurality of types of prepared first buffer modules;
A desired second buffer module is selected from the prepared plurality of types of second buffer modules;
The selected first buffer module is positioned and secured to the first position of the base plate by the first positioning element and the first positioned element of the selected first buffer module. ,
The selected second buffer module is positioned and secured to the second position of the base plate by the second positioning element and the second positioned element of the selected second buffer module. A method for manufacturing shoe soles. A method for manufacturing a shoe sole comprising the buffer structure according to claim 8,
A plurality of types of base plates having first and second positions and first and second positioning elements corresponding to the positions; and are connectable to the first positions of the base plates; and A first buffer module having a first positioned element to be positioned at the first position by a positioning element; and can be joined to the second position of each base plate; and Preparing a second buffer module having a second positioned element to be positioned in the second position by a positioning element;
A desired base plate is selected from the plurality of types of prepared base plates,
The first buffer module is positioned at the first position of the selected base plate by the first positioning element of the selected base plate and the first positioned element of the first buffer module. Sticking,
The second buffer module is positioned at the second position of the selected base plate by the second positioning element of the selected base plate and the second positioned element of the second buffer module. A method for manufacturing a shoe sole that is fixed. A method for manufacturing a shoe sole comprising the buffer structure according to claim 8,
A plurality of types of base plates having first and second positions and first and second positioning elements corresponding to the positions; and are connectable to the first positions of the base plates; and A plurality of types of first buffer modules having a first positioned element to be positioned at the first position by a positioning element; and connectable to the second position of each base plate; and Preparing in advance a plurality of types of second buffer modules having a second positioned element to be positioned at the second position by a second positioning element;
A desired base plate is selected from the plurality of types of prepared base plates,
A desired first buffer module is selected from the plurality of types of prepared first buffer modules;
A desired second buffer module is selected from the prepared plurality of types of second buffer modules;
A first positioning element of the selected base plate and a first positioned element of the selected first buffering module make the selected first buffering module the first baseplate of the selected baseplate. Is fixed at the position of
The second positioning element of the selected base plate and the second positioned element of the selected second buffering module cause the selected second buffering module to move to the second of the selected baseplate. The manufacturing method of the shoe sole which positions and fixes to the position of. A method for manufacturing a shoe sole comprising the buffer structure according to claim 12,
A base plate having first and second positions and first and second positioning elements corresponding to the positions; having a front end portion and a rear end portion, for suppressing bending and twisting of the middle foot portion A plurality of types of reinforcing members; a first positioned element capable of being joined to the first position of the base plate and positioned at the first position by the first positioning element; and the reinforcements A first buffer module having a first joint portion capable of joining a front end portion of the member; can be joined to the second position of the base plate; and can be joined to the second position by the second positioning element. A second buffer module having a second positioned element to be positioned and a second joint portion capable of joining a rear end portion of each reinforcing member;
Of the prepared multiple types of reinforcing members, select a desired reinforcing member,
Joining the front end of the selected reinforcing member to the first joint of the first buffer module, and joining the rear end of the selected reinforcing member to the second joint of the second buffer module;
Positioning and securing the first buffer module to the first position of the selected base plate by a first positioning element of the base plate and a first positioned element of the first buffer module;
A shoe for positioning and fixing the second buffer module at the second position of the selected base plate by the second positioning element of the base plate and the second positioned element of the second buffer module. Bottom manufacturing method. A method for designing a shoe sole comprising the cushioning structure according to claim 8,
Selecting at least one buffer module of the first sole designed by arranging the plurality of buffer modules at the predetermined position of the base plate;
In place of the selected buffer module, another buffer module having a positioned element corresponding to the positioning element at the position of the selected buffer module is designed to be disposed at the position of the selected buffer module. Then, a shoe sole design method for designing the second shoe sole. A method for designing a shoe sole comprising the cushioning structure according to claim 8,
In place of the base plate of the first shoe sole designed by arranging the plurality of buffer modules at the predetermined position of the base plate, a positioning element corresponding to the positioned element of the plurality of buffer modules is provided. A shoe sole design method for designing a second shoe sole by designing the plurality of buffer modules on another base plate. A method for designing a shoe sole comprising the buffer structure according to claim 12,
In place of the reinforcing member among the first soles designed by arranging the reinforcing member below the base plate, a front end portion connectable to the first joint portion of the buffer module and the first of the buffer module 2. A shoe sole design method for designing a second shoe sole by designing another reinforcing member having a rear end portion that can be joined to two joint portions so as to be disposed below the base plate.

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