JP5248823B2 - Cushioning parts for shoe soles and shoes with this - Google Patents

Description

  The present invention relates to a shock absorbing part for a shoe sole to which an elastic material is applied, and a shoe provided with the same.

Sports shoes and walking shoes mainly used during exercise absorb the intense exercise load, protect the body, especially the legs, legs, etc., and demonstrate the ability of athletes according to the content of exercise for each competition. There is a demand for functions that sufficiently support, and further performance such as weight reduction to reduce the load so that the ability can be fully demonstrated. In addition, apart from the premise of consumption for each competition for top athletes, a certain level of durability is essential for general users.
In order to respond to such various demands, the design of the entire shoe, the improvement of the material, etc. have been continued, but as part of it, the development of the buffer parts that bear the buffer function is always continued.

By the way, such a cushioning part is made of a gel material or a soft rubber material having a large penetration value. It becomes large and cannot meet the demand for weight reduction.
For this reason, for example, a buffer material is processed so as to be thinned into a honeycomb structure as a whole and air is confined in the honeycomb so as to positively aim for elasticity (see, for example, Patent Document 1). .
This is expected to obtain almost the intended performance, particularly when the load is applied in the direction of crushing the honeycomb cells.

However, when looking at the load conditions of actual sports shoes, etc., not only the load in the vertical direction, but also the weight of the athlete during competition, the shock absorbing parts are always subjected to compressive and shear loads from all directions. For this reason, in a honeycomb structure or the like that is simply cut out, it is not possible to obtain a bodily sensation with respect to the load, or it is not possible to sufficiently avoid breakage due to local load concentration associated with the shear load. .
Specifically, for example, in sports, loads are generated from all directions, but especially in sports and walking, an important element that moves the load is the movement of the toes of the toes of the foot. For example, when laterally moving or when going up and down an inclined surface, it is particularly important to apply a load to the thumb ball that constantly changes its direction. In addition, the way the load is applied becomes important in balancing the landing of the kite.
Therefore, for the above-described load, as one of the functions required for the cushioning part that supports such movement, for example, support for applying the load from obliquely above is required.
More preferably, the shock absorbing part is firmly received by an excessive deformation external force from obliquely above, but it must be held so as to be pushed up when kicking up, so that it is desired to function as a so-called dub. Here, the function is to function in such a way that it starts from the load from diagonally upward to diagonally downward at the time of landing and is firmly received when pushing forward diagonally upward. It means that.
However, under the present circumstances, a cushioning part that can satisfy both such a feeling of fullness and sufficient durability has not been realized.
Japanese Utility Model Publication No. 3-27603

  The present invention has been made in view of such a background, and is a novel shoe that can meet higher performance requirements including weight reduction, and can ensure a feeling of fluff during use, and also sufficient durability. The technical issue is the development of a shock-absorbing part for the bottom and shoes equipped with it.

That is, the shock-absorbing part for a shoe sole according to claim 1 is composed of a shock-absorbing gel-based shock-absorbing base material, and the shock-absorbing base material has a bottomed recess provided in the thickness direction in the longitudinal direction. And the bottomed recess is an inverted dome shape, and is formed so as to draw an arc from the range of 20% to 100% in the depth direction of the bottomed recess toward the center of the bottom. The ratio of the partition wall thickness to the average diameter of the bottomed recess is set in the range of 1: 1 to 1: 0.3, and the ratio of the depth dimension of the bottomed recess to the buffer base material thickness is 0. .4: 1 to 0.8: 1 is set as a feature.
According to the present invention, by precisely matching the shape of the bottomed concave portion, when any shearing stress accompanying use is applied to the cushioning part, the stress is reduced with respect to any shearing stress and compressive stress expected in use. Dispersion and moderate rebound resilience can be exhibited.
In addition, the side recess and bottomed recess work together to provide stress dispersion and rebound resilience across the entire cushioning part, providing not only a smooth movement of the center of gravity due to the rebound, but also the fumburi in use. A feeling and sufficient durability can be provided.
Furthermore, it can fully exhibit the stress distribution and moderate rebound resilience of the bottomed recess against the shearing and compressive stresses on the shock absorbing parts, providing a smoother center-of-gravity assisting action and a feeling of fluffiness during use. Improvement can be realized.

The shock-absorbing part for a shoe sole according to claim 2 comprises a shock-absorbing base material made of an elastically deformable gel material. The shock-absorbing base material has a bottomed recess provided in the thickness direction in the longitudinal direction. A plurality of bottomed recesses having an inverted dome shape, and at least a part of the peripheral edge of the buffer base material being cut away in the thickness direction. A concave portion is formed, and the side concave portion is formed at a portion located substantially in the middle of two adjacent bottomed concave portions on the peripheral edge.
According to this invention, the side recess and the bottomed recess co-operate to exhibit the stress dispersion and rebound resilience over the entire cushioning part, and not only can obtain an auxiliary action of smooth center of gravity movement due to repulsion, A feeling of fluffiness during use and sufficient durability can be imparted.

Furthermore, in addition to the requirements of claim 2 , the cushioning part for a shoe sole according to claim 3 is made of a gel material having a hardness of 20-40 in Asker C with a hardness of SRIS 0101. Is a feature.
According to this invention, it is possible to improve the feeling of fluffiness and durability brought about by the shock-absorbing parts according to various competitions and functional characteristics.

Furthermore, the cushioning part for a shoe sole according to claim 4 has the reverse dome shape of the bottomed recess in the depth direction of the bottomed recess of 20% to 100% in addition to the requirement of claim 2 or 3. It is formed so that an arc may be drawn from the range to the center of the bottom.
According to the present invention, by precisely matching the shape of the bottomed concave portion, when any shearing stress accompanying use is applied to the cushioning part, the stress is reduced with respect to any shearing stress and compressive stress expected in use. Dispersion and moderate rebound resilience can be exhibited.

Furthermore, in the cushioning part for a shoe sole according to claim 5 , in addition to the requirement according to claim 2 , 3 or 4 , the ratio of the partition wall thickness to the average diameter of the bottomed recess is 1: 1 to 1: 0. .3 range is set as a feature.
According to the present invention, by precisely matching the shape of the bottomed concave portion, when any shearing stress accompanying use is applied to the cushioning part, the stress is reduced with respect to any shearing stress and compressive stress expected in use. Dispersion and moderate rebound resilience can be exhibited.

Furthermore cushioning parts for shoe sole of claim 6, claim 2, 3 or in addition to the requirements of the fourth aspect, the ratio of the depth dimension and the buffer substrate thickness of the bottomed recess It is characterized by being set in the range of 0.4: 1 to 0.8: 1.
According to the present invention, by precisely matching the shape of the bottomed concave portion, when any shearing stress accompanying use is applied to the cushioning part, the stress is reduced with respect to any shearing stress and compressive stress expected in use. Dispersion and moderate rebound resilience can be exhibited.

Furthermore, the cushioning part for a shoe sole according to claim 7 is characterized in that, in addition to the above requirements, the cushioning base material has a partially different apparent hardness for each block in plan view. It is.
According to the present invention, it is possible to make the fluffiness and durability in use brought about by the cushioning parts good according to various competitions and functional characteristics, and to assist the smooth movement of the center of gravity and in use. Can improve the feeling of fun.

The shoe according to claim 8, said claims 1, 2, 3, 4, are those comprising as a feature in that a buffer part for the sole of the 6 or 7, wherein is incorporated in the sole .
According to the present invention, it is possible to impart a feeling of fluffiness during use and sufficient durability to the sole of the shoe.

Furthermore, the shoe according to claim 9 is characterized in that, in addition to the requirement according to claim 8 , the portion where the cushioning part for the shoe sole is incorporated into the sole is a portion located below the thumb ball. It consists of.
According to this invention, it is possible to alleviate the impact at the time of landing on the thumb ball where the load movement is remarkable, and to effectively give the load movement and a fullness feeling when kicking out.

Furthermore, in the shoe according to claim 10 , in addition to the requirement according to claim 8 or 9 , the cushioning part for the shoe sole has a trapezoidal outer shape in plan view taking a long and flat shape. It is characterized by being arranged so that the long side in the width direction is located inside.
According to the present invention, it is possible to alleviate the impact at the time of landing on the thumb ball with remarkable load movement, while more effectively imparting a feeling of fluffiness when kicking out. It is possible to sufficiently exhibit the stress distribution and moderate rebound resilience of the inverted dome-shaped bottomed recess in the longitudinal direction against the shear stress and compressive stress caused by the bending of the finger generated between the finger ball and the child ball. .
Furthermore, since the inverted dome-shaped bottomed concave portion is formed so as to draw an arc from the depth direction toward the center of the bottom portion, it is easy to remove the mold and productivity is improved and durability is improved.
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 cushioning part for a shoe sole that can meet a higher level of performance requirement including weight reduction, in particular, a feeling of fluffiness during use, and sufficient durability can be secured, and a shoe equipped with the same. Can be provided. As a result, it is possible to protect the athlete's body, particularly the legs, lower limbs, and the like, which is the user, and contribute to improving the recording. Furthermore, during walking, when performing extreme lateral movement or climbing up and down the inclined surface, especially when the load is applied to the thumb ball, the cushioning part firmly receives the excessive deformation external force from diagonally above, while kicking. In raising, it can be held so as to push up.

Hereinafter, the best mode for carrying out the present invention will be described based on the illustrated embodiments.
It should be noted that the following embodiments can be appropriately modified within the scope of the technical idea of the present invention.

What is denoted by reference numeral 1 is a cushioning part for a shoe sole of the present invention (hereinafter referred to as a cushioning part), which is incorporated into a shoe 2 and provided.
First, the shoe 2 will be described in detail with reference to the illustrated embodiment. As shown in FIG. 1, the shoe 2 includes an upper 20 that covers the wearer's foot and a shoe sole 21. These are appropriately integrated by bonding or sewing.

Among these, the upper 20 is formed by integrating an upper body 200, a tongue 201, an ankle pad 202, a heel guard 203 and a toe guard 204 by bonding or sewing, and a line pattern for decoration is provided on a side peripheral portion thereof. 205 is sewn and a shoelace 206 is provided.
On the other hand, the shoe sole 21 is formed by integrating, for example, an inner sole 210, a midsole 211, an outer sole 212, and the like.

Then, when assembling the cushioning part 1 of the present invention to the shoe 2 as described above, the parts pocket 23 is formed in such a shape that the midsole 211 of the shoe sole 21 is partially cut out. The shock-absorbing part 1 is assembled to The parts pocket 23 may be formed on the back surface of the inner sole 210.
In addition, as for the assembly position of the cushioning part 1, an appropriate part corresponding to the competition is selected, but as shown in FIG. It is preferably provided below the range connecting the three points of the ridges.

Next, the buffer part 1 will be described in more detail. In FIG. 2, what is indicated by reference numeral 10 is a buffer base material which is a long and flat plate-like member, and as an example, it is formed in a trapezoidal shape or a wedge shape with one side slightly narrowed in plan view. The
Such a cushioning part 1 is provided with a plurality of bottomed recesses 11 whose one surface is open in the thickness direction. In the embodiment shown in FIG. Are arranged along the longitudinal direction of the buffer substrate 10 so as to form one outer row 111 on each of the left and right sides and a central row 112 sandwiched therebetween.
Of course, the bottomed recesses 11 are referred to as the outer row 111 and the center row 112 in view of the alignment along the longitudinal direction of the buffer base material 10 as described above. Is not necessarily strictly maintained. Incidentally, when arranging four or more rows in the longitudinal direction, the central row 112 is set as two or more rows.

Further, many bottomed recesses 11 are formed to have a hexagonal shape in plan view, but one end in the longitudinal direction of the buffer base material 10 is narrowed narrowly. Accordingly, the hexagonal shape of the outer row 111 itself is not necessarily an equilateral shape, and a distorted shape is adopted.
Further, in the central row 112, the bottomed concave portion 11 on the narrow end side in particular is formed in a rhombus shape.
In addition, such a deformation | transformation to the unusual shape by the side of the bottomed recessed part 11 brings about the state which can ensure the thickness dimension of the partition 13 formed between them substantially equally in any position. As will be described in detail later, the apparent hardness of the central row 112 is set so as to be hardened.

Further, when the bottomed recess 11 is viewed in the longitudinal sectional direction, a stress dispersion / accumulation portion 12 is provided at a position near the bottom 11a, and specifically, the inner wall near the bottom 11a is reversed. An appropriate circular arc is drawn in a dome shape so as to be smoothly connected from the side wall toward the bottom portion 11a.
In this way, the stress dispersion / accumulation portion 12 is formed in a reverse dome shape, thereby exhibiting stress dispersion and appropriate rebound resilience with respect to stress from any shearing direction. It becomes possible to obtain an auxiliary action of movement.
In addition, it is important for such a reverse dome-shaped bottomed concave portion 11 and a side concave portion 14a, which will be described later, to co-operate in order to disperse stress throughout the cushioning part 1 and to exert a resilience performance. In particular, a portion formed so as to draw an arc toward the depth direction of the bottomed recess 11 is referred to as a stress dispersion / accumulation portion 12.

More preferably, at one or both of the circumferential edges 14 in the longitudinal direction or the width direction of the buffer base material 10, the buffer base material 10 is partially cut away in the thickness direction. By forming the recess 14a, the stretchability when a shear stress is applied is improved.
Therefore, even if the buffer base material 10 is assembled in the parts pocket 23 as shown in FIGS. 4A to 4D and FIGS. The stress deformation of the peripheral side edge 14 is difficult to be constrained on the contact surface between the part pocket 23 and the peripheral side edge 14 and the bottomed recess 11 easily deform uniformly.
4 (a) to 4 (d) and FIGS. 5 (a) to 5 (d) show examples in which the side recess 14a is formed on the circumferential side edge 14 in the longitudinal direction of the buffer base material 10. Depending on the case, the side recess 14a may be formed on the circumferential edge 14 in the width direction, or the side recess 14a may be formed on the circumferential edge 14 in both the longitudinal direction and the width direction.

Further, in these embodiments, the side recess 14a is formed in a portion located substantially in the middle of the two adjacent bottomed recesses 11 in the outer row 111 (outermost row), so that it is applied from the longitudinal direction. With respect to the shear stress and the compressive stress, the stress dispersion and the appropriate rebound resilience of the inverted dome-shaped bottomed recess 11 can be sufficiently exhibited in the longitudinal direction.
As a result, the movement of the center of gravity can be assisted more smoothly, and the feeling of fluff when exercising can be further improved.
In this way, the deformation of the peripheral edge 14 and the deformation of the bottomed recess 11 work together to distribute the stress over the entire cushioning part 1.
4E to 4H show the deformed state of the shock-absorbing part 1 when the side recess (14a) is not provided, and the bottomed recess 11 located in the peripheral part where the stress is applied. This shows a state in which the stretching property is suppressed when deformation is concentrated and shear stress is applied, and the stress is not distributed over the entire surface of the cushioning part 1.
Specifically, the above-described stretch property will be described. FIGS. 5 (e) to 5 (h) show that the peripheral recess 14a is provided in the peripheral side edge 14 on the landing side, and the peripheral side on the kicking side is opposed. The side edge 14 shows the deformation | transformation state of the buffer part 1 when not providing a side recessed part (14a). This is because, for example, depending on the type of sport, the weight applied to the stress applied at the time of landing is exerted with moderate stress dispersion and rebound resilience while the weight shift is not impaired, while the kicking side dares to distribute the stress / This is effective when trying to limit the expression of the stretch function of the cumulative function to a desired part of the cushioning part 1.

By providing these side recesses 14a, the partition wall thickness W on the peripheral edge 14 side of the partition wall 13 can be set to the same dimensions as other parts.
Although illustration is omitted, if the partition wall thickness W on the peripheral edge 14 side is thicker or thinner from one side to the other side in the longitudinal direction, the side with the smaller thickness W (side with a soft apparent hardness) Stress can be induced. For example, if the partition wall thickness W on the in-course side of the shoe 2 is moderately soft (apparent hardness), the stress distribution / accumulation function can be followed while inducing stress toward the in-course side. .
Further, the shape of the side recess 14a can take various forms as shown in FIGS. 7A to 7E, and is formed in a state having a vertical or inclined surface upward. .

  Further, as shown in FIGS. 3D and 3E, the cross-sectional shape of the peripheral edge 14 may be tapered, and in this case, the shape of the side recess 14a is shown in FIGS. 7F and 7G. It will be. And the stretch property at the time of receiving the stress applied from a longitudinal direction can be improved by making the cross-sectional shape of the partition 13 become thin gradually from the lower part to the upper part. Moreover, since mold release property improves in the case of shaping | molding of the buffer base material 10, the productivity can be improved. In addition, what is necessary is just to provide the angle in the case of inclining suitably about 1 to 12 degree | times according to the landing angle at the time of running from a walk, for example.

  Here, the operation of the peripheral edge 14 and the side recess 14a will be supplemented with reference to FIG. For example, when landing a foot during sports, there is an inclination ("Hyper Pronation" that tilts the foot outward or "Hyper Spination" that tilts the foot inward) due to exercise or habit, etc. It is rather rare that the side edge 14 is applied from the front (perpendicular). Strictly speaking, the stress is applied to the left or right rather than the front. Here, it becomes easy to follow the stress individually from the vicinity where the peripheral edge 14 divided between the side recesses 14a is applied, and each of the peripheral sides 14 is provided even when stress is applied obliquely. Since the edge 14 follows and guides while sequentially deforming, the stress can be accurately captured and the stress dispersion / accumulation function can be appropriately supported.

Next, various dimension settings of the buffer base material 10, the bottomed recess 11 and the partition wall 13 will be described.
First, for example, in the embodiment shown in FIG. 2, the thickness t of the buffer base material 10 is 4 mm, while the depth dimension h of the bottomed recess 11 is 2 mm.
Thus, the ratio of the depth dimension h of the bottomed recess 11 and the buffer base material 10 thickness dimension t is 0.4: 1 to 0.8: 1 depending on the magnitude of the load received by the buffer base material 10. It is set to be in the range. If the ratio of the depth dimension h of the bottomed recess 11 to the buffer base material 10 thickness dimension t is smaller than 0.4: 1 (h / t <0.4), a shear stress is applied to the buffer base material. When this is done, the deformation of the partition wall 13 forming the bottomed recess 11 is so small that the stress dispersibility and the feeling of swelling are extremely poor. On the other hand, when the ratio is larger than 0.8: 1 (h / t> 0.8), it is easily deformed (buckled) with respect to the shear stress, and a feeling of fluff cannot be obtained.
By the way, the feeling of puffiness when the depth dimension h and the thickness dimension t are different is confirmed by a sensory test as shown in Tables 1 to 3. In Tables 1, 2, and 3, the height of the buffer base 10 is different from that of Asker C10, 20, and 40, respectively.
Incidentally, in the sensory test, as shown in FIG. 3, the sponge part of the two parts of the thumb ball and the heel is removed from the back side leaving the surface cloth to form the parts pocket (23). The shock-absorbing parts (1) are provided at the two locations so that the opening of the bottomed recess (11) is at the bottom, and assembled to the walking shoes and subjected to an actual wearing test.
In addition, this sensory test was conducted on five subjects, and for each cushioning part (1), the user can consciously feel the overall ease of walking and comfort, such as the burden on the foot and ease of balancing. It is confirmed whether or not. Then, as a result, the case where 5 people were present was marked as ◎, the case where 4 people were present as ○, the case where 3 people were present as Δ, and the case where it was less (less than half) as ×.

When the bottomed recess 11 is viewed in plan, the average diameter D is 5 mm, and the partition wall thickness W is 2 mm.
Thus, the ratio between the average diameter D of the bottomed recess 11 and the partition wall thickness W is set to be in the range of 1: 1 to 1: 0.3 (0.3 <W / D <1). Yes. When the average diameter D is 1, when the partition wall thickness W is greater than 1, when shear stress is applied, it is difficult for stress deformation to be transmitted to the adjacent bottomed recess through the partition wall. Dispersibility cannot be obtained. On the other hand, if the partition wall thickness W is smaller than 0.3, it is easily deformed (buckled) with respect to the shearing stress, and not only a feeling of fluffiness is obtained but also the durability is remarkably impaired.
In addition, when the average diameter D and the partition wall thickness W are different, the feeling of swelling is also confirmed by a sensory test as shown in Tables 1-3.

Furthermore, when the bottomed concave portion 11 is viewed in the direction of the cross section, the starting point of the stress dispersion / accumulation portion 12 is in the range of 20% to 100% in the depth direction (the surface is assumed to be 100%). A stress dispersion / accumulation portion 12 is formed from here toward the center of the bottom portion 11a.
Incidentally, the feeling of fluffiness and comfort when the starting point of the stress distribution / accumulation part 12 is varied are confirmed by a sensory test as shown in Table 4.

In the sensory test shown in Table 4, the evaluation of the cushioning part (referred to as Sample 1) formed with the R position (stress distribution / starting point of the cumulative expression part 12) as 50% is high, and is separately described below. A comparative test with a sample was performed to confirm the influence of shear compression deformation on the repeatedly applied load.
Sample 2: The same outer shape as Sample 1, and the inside of the bottomed recess (11) is not a dome shape but a right angle (formed with the R position in Table 4 as 0%).
Sample 3: Sample 2 with the bottom removed and penetrated.
(The samples 1, 2, and 3 differ only in the shape of the bottomed recess (11), and the materials and the outer shape are exactly the same.)
The test method is as follows.
First, using a repeated compression tester, prepare a sample stand of a transparent acrylic plate inclined about 10 degrees assuming a landing landing angle, and an inner sole (210) containing the sample is placed on the toe side. Place it on the sample stage with double-sided adhesive tape so that it faces down.
And the center of each of the thumb ball and the cushioning part (1) placed in the buttocks is a dome-shaped lumber projection with a curvature of 20mm and a height of 10mm assuming the thumb ball of the adult male foot from the direction of gravity. When the pressurizer provided with a part is dropped, a load is applied so that the protrusion compresses the cushioning part (1) by 50%, and the pressurizer is moved up and down in the direction of gravity once a second. It was made to reciprocate at a constant speed.
As a result, the inner sole (210) is firmly fixed to the inclined position and held in place, and the protrusion of the pressurizer can be pressed from the inclined direction, so that the buffer part (1) is always subjected to stable shear compression. The load can be applied as follows.

As a result, the sample 3 gradually moved to the lower side of the tilt base in the parts pocket (23) and started to deform so as to be largely displaced and contracted as a whole.
In addition, although the sample 2 does not significantly shift as much as the sample 3, it gradually moves in the parts pocket (23) to the lower side of the inclined base so that the opening of the bottomed recess (11) is slightly deformed. Began to become.
However, only sample 1 was not displaced and the opening of the bottomed recess (11) was not deformed.
From such a result, it has confirmed that the buffer part (1) of this invention fully buffered the load from the diagonal direction. Therefore, while maintaining stable shock-absorbing performance against shearing and compression loads, it is thought that it contributes to the comfort, feeling of stepping, and balance that are particularly important in sports shoes such as walking It is.

The buffer base material 10 has such an outer shape. Next, the material will be described. This material is an elastically deformable material, and a gel material is applied.
Specifically, a gel material having a hardness of 20 to 40 as Asker C in SRIS 0101 can be preferably used. As an example, CF5056 manufactured by Toray Dow Corning (hardness: SRIS 0101 compliant Asker C 30) is employed.
In addition to the silicone gel material described above, the buffer substrate 10 may be made of urethane, polyethylene, acrylic, acrylic urethane, butadiene, isoprene, butyl, styrene butadiene, ethylene vinyl acetate copolymer, ethylene-propylene-diene terpolymer. A gel material such as an original copolymer or fluorine can be applied. Moreover, as long as it does not affect the various properties of the gel material, it may be colored by adding a known pigment. In order to further reduce the weight, 0.1 to 3.0 parts by weight of a hollow filler with respect to 100 parts by weight of the material, and a heat dissipating filler to dissipate heat due to friction generated on the sole of the foot, etc. are added as appropriate. Also good.

And when assembling the cushioning part 1 to the shoe 2, the basic form is a method of assembling the parts pocket 23 formed in the midsole 211 or the like so as to be non-adhesive. You may make it fix in the range which does not inhibit a function, such as adhere | attaching by apply | coating an adhesive agent, or covering the surface with a cloth integrally.
As shown in FIG. 3B, the cushioning part 1 is assembled with the opening of the bottomed recess 11 facing upward, and the opening of the bottomed recess 11 facing downward as shown in FIG. 3C. You may do it.

  Further, in this embodiment, the location where the cushioning part 1 is incorporated into the midsole 211 is a part located below the thumb ball, and the cushioning part 1 has a trapezoidal shape in plan view. And arranged so that the long side in the width direction is located inside. This is because the load applied between the child ball and the mother ball to which relatively strong stress is widely applied is followed all over.

Further, the cushioning part 1 is formed so that the apparent hardness is different for each block in a plan view, and the example shown in FIG. 6A has three rows partitioned along the width direction. Among the blocks B1, B2, and B3, the outer (upper and lower) blocks B1 and B3 are softer than the central block B2. Thereby, moderate stress dispersion and rebound resilience can be exhibited with respect to stress applied from both longitudinal directions.
Further, as shown in FIG. 6B, among the three rows of blocks B4, B5, and B6 divided along the longitudinal direction, the outer (left and right) blocks B4 and B6 are harder than the central block B5. It can also be made to be. As a result, it can be stabilized so that both ends are held while sinking near the center in the longitudinal direction to induce stress.
Further, as shown in FIG. 6C, the hard portions may be distributed in an H shape. Thus, if the apparent hardness is set to an H-shaped distribution, the stress distribution of the inverted dome-shaped bottomed concave portion 11 can be reduced with respect to the shear stress and the compressive stress applied from one longitudinal direction to the other. Appropriate impact resilience can be sufficiently exerted in the longitudinal direction.
Furthermore, it can be stabilized so that both end sides are held against the load movement on the shock absorbing part 1 from one longitudinal direction to the other longitudinal direction, and the load movement is stable and smooth on the shock absorbing part 1. The load movement can be guided in an appropriate direction.

As described above, the fact that the apparent hardness of the cushioning part 1 is different for each block in a plan view can also be realized by forming the side recess 14 a on the peripheral edge 14.
The apparent hardness can be set differently depending on the distance between the side concave portion 14a and the bottomed concave portion 11 in plan view, and the side concave portion 14a is particularly located at an intermediate position between the bottomed concave portions 11. By doing so, the stress distribution / accumulation function as described above can be more fully expressed.
And by ensuring a sufficient distance between the bottomed recesses 11 (thickness of the partition wall 13), the portion can be made particularly hard in apparent hardness. A hardness distribution as shown in FIGS. 6A, 6B and 6C is realized by gradually changing the size of the bottomed recess 11 and the adjacent interval (thickness of the partition wall 13) from the center to the outside. Is something that can be done.

As shown in FIG. 1, in the cushioning part 1 positioned below the thumb ball, the central portion is set to be relatively softer than the left and right directions so that the thumb ball is stabilized, while the longitudinal direction is set in the longitudinal direction. It is preferable to set the side surface to be relatively soft (the apparent hardness is set to a hard H-shaped distribution as shown in FIG. 6C, and the stress distribution / accumulation function is applied to a portion other than the H-shaped distribution. Expression can be more expressed).
Further, the side concave portion 14a provided in at least a part of the circumferential side edge 14 in the longitudinal direction of the buffer base material 10 is gradually softened over a portion other than the H-shaped distribution in apparent hardness depending on its shape and position. By setting, it can be adjusted to guide the load movement of the thumb ball in an appropriate direction.

In addition to the honeycomb shape as shown in FIG. 8 (a), the planar shape of the bottomed recess 11 for expressing the stress dispersion / accumulation function is aligned as shown in FIG. 8 (b). A rectangular shape may be used, or an appropriate shape may be applied, such as those arranged in a scale shape as shown in FIG. 8C, and further configured as a circle and a diamond shape as shown in FIG. 8D. it can.
Note that the partition wall thickness is supplemented. In the above case, the bottomed recesses 11 are provided so that the intervals on the surface are adjacent to each other in parallel and evenly. The ratio of the partition wall thickness W to the average diameter D is, for example, the same shape or a similar shape even when the layout angles are different from each other and the partition wall thickness W is different without parallel intervals, or the shape of the bottomed recess 11 is also disposed. Considering various cases, such as when the partition wall thickness W is different and arranged in a complicated manner, the surface of the part as a whole should be taken as the average partition wall width. This is to understand.
Furthermore, by finely adjusting the planar shape of the bottomed recess 11 and the interval between adjacent bottomed recesses 11, that is, the thickness of the partition wall 13 over the entire area, the apparent hardness in plan view is adjusted in detail. It is possible to finely adjust the ease of developing the stress dispersion / accumulation function.

When the cushioning part 1 is mounted on the shoe 2 and receives a load in the direction of the vector V shown in FIG. 4, the weight distribution of the athlete during the competition is caused by the action of the stress dispersion / accumulation unit 12. A feeling can be given, and it can contribute to improvement of a record while protecting a player's body, especially a leg, a leg, etc. Further, the durability of the shock-absorbing part 1 itself is improved by the stress dispersion / accumulation part 12. In other words, even in the case of intense sports, even if stress that changes the vector excessively due to the movement from landing to kicking is applied to the buffer part 1, stress distribution / accumulation function is manifested throughout the part, thereby accepting stress. From when the load is moved, until the stress is released, it has a function that can be appropriately guided as a series.
Further, at this time, on the contact surface between the peripheral side edge 14 and the part pocket 23, the side recess 14a makes it difficult for stress deformation of the peripheral side edge 14 to be restrained. Since it is easily deformed uniformly, the deformation of the peripheral edge 14 and the deformation of the bottomed recess 11 work together to distribute the stress over the entire surface of the cushioning part 1.

It is a disassembled perspective view which shows the shoes provided with the buffer part of this invention. It is the 6th page figure and vertical side view which show the buffer part of this invention. FIG. 5 is a plan view showing an inner sole or a midsole, a cross-sectional view showing a parts pocket containing a shock-absorbing part, and a cross-sectional view showing a shock-absorbing part having a tapered peripheral edge. It is the front view and top view which show the mode of a deformation | transformation of the buffer part in which the side recessed part was provided, and the top view which shows the mode of a deformation | transformation of the buffer part in which the side recessed part is not provided. It is the side view and top view which show the mode of a deformation | transformation of the buffer part in which the side recessed part was provided in two sides, and the top view which shows the mode of a deformation | transformation of the buffer part in which the side recessed part was provided in one side. It is a top view which shows the buffer part which made the apparent hardness differ for every block. It is a perspective view which shows the side recessed part which made the shape different. It is a top view which shows the Example of the planar shape of a bottomed recessed part.

DESCRIPTION OF SYMBOLS 1 Buffer part (for shoe soles) 10 Buffer base material 11 Bottomed recessed part 11a Bottom part 111 Outer row 112 Center row 12 (Stress) dispersion / accumulation part 13 Partition 14 Circumferential edge 14a Side recessed part 2 Shoes 20 Upper 200 Upper Body 201 Velor 202 Ankle pad 203 Heel guard 204 Toe guard 205 Line pattern 206 Shoelace 21 Shoe sole 210 Inner sole 211 Mid sole 212 Outer sole 23 Parts pocket B1 block B2 block B3 block B4 block B5 block B6 block D Average diameter h Depth Dimensions t Thickness dimensions V Vector W Bulkhead thickness

Claims (10)

The buffer base material is made of an elastically deformable gel material, and the buffer base material has a plurality of bottomed recesses arranged in the thickness direction thereof, aligned in the longitudinal direction, and the bottomed recesses. Is an inverted dome shape, and is formed so as to draw an arc from the range of 20% to 100% in the depth direction of the bottomed recess toward the center of the bottom, and the ratio of the partition wall thickness to the average diameter of the bottomed recess is The range of 1: 1 to 1: 0.3 is set, and the ratio of the depth dimension of the bottomed recess to the buffer base material thickness dimension is set to a range of 0.4: 1 to 0.8: 1. And at least part of the peripheral side edge of the buffer base material is formed with a side concave portion that is cut in the thickness direction, and the side concave portion has two bottomed bottoms adjacent to the peripheral side edge. A shock-absorbing part for a shoe sole, wherein the cushioning part is formed at a position located substantially in the middle of the recess .   The buffer base material is made of an elastically deformable gel material, and the buffer base material has a plurality of bottomed recesses arranged in the thickness direction thereof, aligned in the longitudinal direction, and the bottomed recesses. Is a reverse dome shape, and at least a part of the peripheral side edge of the buffer base material is formed with a side recess that is cut in the thickness direction, and the side recess is formed at the peripheral side edge. A shock-absorbing part for a shoe sole, wherein the cushioning part is formed at a position located approximately in the middle between two adjacent bottomed recesses. The shock-absorbing part for a shoe sole according to claim 2, wherein the shock-absorbing base material is made of a gel material having an Asker C hardness of 20 to 40 in SRIS 0101. The inverted dome shape with a bottom recess claim 2, characterized in that the depth of 20% to 100% of the bottomed recess and is formed so as to draw an arc toward the bottom center Or the cushioning part for shoe soles of 3 description. Wherein the ratio of wall thickness to the average diameter of the bottomed recess is 1: 1 to 1: 0.3 buffer part according to claim 2, 3 or 4 for shoe sole, wherein the set in the range of . The ratio of the depth dimension of the bottomed recess and the cushioning base material thickness of 0.4: 1 to 0.8: claim 2, 3 or 4, wherein it is set to 1 in the range Buffer parts for shoe soles. The buffer substrate according to claim 1, 2, 3, 4, characterized in that having different hardness apparent for each block partly in a plan view, 5 or is for shoe sole 6 according Buffer parts. Shoe characterized in that the cushioning part is incorporated in the sole of claim 1, 2, 3, 4, for the sole of the 6 or 7, wherein. The shoe according to claim 8, wherein the portion where the shoe sole cushioning part is incorporated into the sole is a portion located below the thumb ball. The cushioning part for the shoe sole has a trapezoidal outer shape in plan view taking a long and flat shape, and is arranged such that the long side in the width direction is located inside. The shoe according to claim 8 or 9 .

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