JPH0713521Y2 - Shoe sole - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] The present invention can effectively absorb shocks during running / walking, and perform optimum shock absorption according to the weight of the shoe wearer and the purpose of running / walking. The present invention relates to a shoe sole structure.

[0002]

2. Description of the Related Art When a person runs or walks, an impact is applied to the shoes, and this reaction is applied to the person's feet. In order to weaken this reaction as much as possible, various proposals have been made and put into practical use in which the structure of the shoe sole is devised. An example is a shoe in which a sponge layer is attached to the insole, or a shoe in which the entire outsole is made of a material having excellent impact absorption such as polyurethane foam. Further, the portion to which the above-mentioned impact is most strongly applied is the heel portion, and the ground load value of this portion is as large as 1.2 to 1.5 times the weight. Therefore, in recent years, as shown in FIGS. 4 to 6, a structure has been developed in which a shock absorbing member 02, 03, 04 made of polyurethane or the like having a special composition is embedded or attached to the heel portion 1. The shock absorbing member 02 of FIG.
As shown in the sectional view of FIG. 4 (A), it is a flat plate having upper and lower surfaces parallel to the grounding surface of the heel portion 1, and is substantially the same as the planar shape of the heel portion 1 as shown in the plan view of FIG. 4 (B). It has a shape and is embedded in the entire heel portion 1. As shown in the cross-sectional view of FIG. 5 (A) and the plan view of FIG. 5 (B), the impact absorbing member 03 of FIG. 5 is a rectangular parallelepiped having upper and lower surfaces parallel to the grounding surface of the heel portion 1, and the heel portion 1 It is embedded almost in the center.
As shown in the cross-sectional view of FIG. 6 (A), the impact absorbing member 04 of FIG. 6 has a so-called wedge shape in which the lower surface is parallel to the ground contact surface, and the upper surface descends from the rear of the heel to the front of the heel. And Fig. 6
As shown in the plan view of (B), it has the same shape as that of the heel portion 1 in plan view, and is attached to the upper surface of the heel portion 1 as shown in FIG. 6 (A), or in the sectional view of FIG. 6 (C). As shown, it is sandwiched in the heel portion 1.

[0003]

[Problems to be Solved by the Invention] By the way, the direction of the strongest impact on the heel portion 1 during running / walking is indicated by an arrow F in FIG.
The extension direction of the center line of the leg bone is indicated by. The impact applied in this direction is the impact absorbing members 02-0 of FIGS.
4 absorbs to some extent. This absorbing effect becomes better as the thickness of the shock absorbing members 02 to 04 is increased, but if the thickness is too large, the heel portion 1 is relatively moved.
Since the material capacity of the heel portion 1 is reduced, the rigidity and strength of the heel portion 1 are reduced. In particular, shoes such as business shoes and women's shoes that have a heel with a steep step have reduced not only the heel, but the rigidity and strength not only from the heel to the non-stepped part, but also from the shape of the sole. There is a disadvantage that it cannot be maintained.

For this reason, normally, in consideration of the rigidity and strength of the heel portion 1, as shown in FIGS. 4 to 6, the shock absorbing members 02 to 0 having a relatively small thickness and therefore a small shock absorbing effect are small.
4 is used. Of these, the wedge-shaped shock absorbing member 04 of FIG. 6 takes into consideration the above-described impact direction F applied to the heel portion 1 during running / walking, but is still thick in terms of rigidity and strength of the heel portion 1. However, there is a disadvantage that a sufficient shock absorbing effect cannot be obtained as in the case shown in FIGS. 4 and 5. Further, in the case of a rectangular parallelepiped impact absorbing member 03, even if the thickness of the member 03 is slightly increased, the heel portion is larger than that of the impact absorbing members 02 and 04 of FIGS. 4 and 6. Although it is possible to suppress the relative decrease amount of the material capacity of No. 1 to be low, if the thickness is sufficiently large enough to obtain a sufficient shock absorbing effect, the heel portion 1, especially the heel portion 1 to the non-step portion. The material capacity decreases over time, and the rigidity / strength in that portion decreases.

Moreover, the angle α (see FIG. 3) formed with respect to the vertical line V of the heel portion 1 in the direction (F) of the impact (force) applied to the heel portion 1 depends on the road surface condition during running / walking. Moreover, it changes within a certain range depending on the running and walking habits of the wearer. In the shock absorbing members 02 and 03 shown in FIGS. 4 and 5, for example, at the time of grounding, the F is at an angle α as shown in FIG.
In such a case, the impact absorbing effect is reduced as compared with the case where the F is oriented in the direction of the vertical line V of the heel portion 1 (that is, α = 0 °). Further, in the shock absorbing member 04 shown in FIG. 6, when F is oriented in the direction of the vertical line V of the heel portion 1, the shock is greater than when the F is perpendicular to the wedge surface of the shock absorbing member 04. Absorption effect is reduced. As described above, the effective impact absorption during running / walking by the conventional shock absorbing members 02-04 shown in FIGS.
04 only in the direction perpendicular to the surface (arrow direction in FIGS. 4 to 6), and absorption of impact in other directions is not so effective. In other words, in these conventional shock absorbing members 02 to 04, there is a considerably large proportion of the portion that does not contribute to shock absorption, and there is a member economic problem required for the members 02 to 04, and from a specific direction. There is also a problem that even if a certain degree of impact absorption effect can be obtained with respect to the applied force, the effect is low with respect to the force applied by changing the direction during running / walking.

On the other hand, the magnitude of the impact (force) applied to the heel portion 1 depends on the weight of the shoe wearer, or the purpose of running / walking (for example, running / walking for business, running / walking for leisure).
It changes variously depending on walking, running / walking for daily life, etc.). Therefore, originally, the optimum physical properties of the shock absorbing member are different for each person who wears shoes and for the purpose of running / walking when wearing shoes. However, FIGS.
All of the conventional shock absorbing members 02 to 04 shown in (3) are fixedly provided on the heel portion 1, and therefore have uniform physical properties. Due to such circumstances, there has hitherto been no shoe in which a shock absorbing member which is optimal for each shoe wearer and which is optimal for the purpose of running / walking while wearing the shoe is used.

In consideration of the above points, the present invention does not impair the rigidity and strength of the heel portion, and thus can be effectively applied to shoes having a heel portion with a steep step and in terms of material cost. It is an object of the present invention to provide a shoe sole structure capable of effective shock absorption without the problem of the above, and moreover, capable of performing optimum shock absorption according to the weight of the shoe wearer and the purpose of running or walking. .

[0008]

As a result of repeated studies to achieve the above object, the present inventor has found that the surface of the shock absorbing member to which a shock (force) at the time of contact is applied is limited to a relatively narrow range. Focusing on the fact that the greater the capacity of the buffer absorbing member existing below the surface to which the impact (force) is applied (that is, the thicker the thickness), the higher the impact absorbing effect, The shape of the shock absorbing member is a specific shape having a large thickness only on the surface to which the impact (force) at the time of contact with the ground is applied, and the shock absorbing member having the specific shape is appropriately replaced according to the weight of the shoe wearer. We came to the conclusion that it would be possible, and came to propose the present invention. That is, the sole of the present invention, the lower surface (including a schematic hemispherical shape, hereinafter the same) schematically semi ellipsoidal shape forms a spherical shock absorption member to schematic half oval, the major axis direction is the sole of the member Front and back direction
That is, it is embedded in almost the center of the heel so that it faces in the direction from the toe to the heel) . Further, the shoe sole of the present invention is configured such that the above-described shock absorbing member made of different material and / or the same material is replaceably fitted in the upper recess of the heel portion corresponding to the lower surface shape of the shock absorbing member. It is also characterized.

[0009]

The bottom of the shoe sole of the present invention has a spherical shape, and has the same shape as the lower surface side of the shock absorbing member having a substantially semi-elliptical spherical shape or a substantially semi-oval shape as a whole. The impact absorbing member is embedded in the recess formed on the upper surface of the heel. As a result, the heel portion has the top surface formed into a planar shape while the impact absorbing member having the above-mentioned special shape is embedded therein.
Further, as described above, the shock absorbing member has a substantially semi-elliptic spherical shape or a substantially semi-oval shape whose lower surface is a spherical shape, and in order to secure a shock (force) absorbing action in a thickened portion which is swollen to the maximum, The material volume required for the entire impact absorbing member is considerably smaller than the material volume required to obtain the same impact absorbing action with the conventional impact absorbing members 02 to 04 shown in FIGS. Therefore, the relative decrease in the material volume of the heel portion is extremely small, and the rigidity and strength of the heel portion or the stepless portion, especially the heel portion or the stepless portion having a steep step are secured.

When a wearer of such a shoe having the sole of the present invention runs or walks, an impact based on the weight of the wearer (actually, as described above, 1.2-
Most of the force (corresponding to 1.5 times) is applied to the approximately semi-elliptic spherical or approximately semi-oval flat portion of the impact absorbing member (upper plane of the impact absorbing member). And, a part of the impact applied to the heel portion is absorbed in the thickest portion of the impact absorbing member, and is transferred to the lower surface side of the heel portion via the spherical surface portion on the lower surface side of the substantially semi-elliptic spherical shape or the substantially semi-oval shape. It is distributed and transmitted. In addition, the direction of the impact (force) applied to the heel part (see FIG.
The direction of the arrow F shown in Fig. 2) depends on the condition of the road surface during running / walking, or the running / walking habit of the wearer.
Although it changes in a certain range (that is, the angle α shown in FIG. 3 changes in a certain range), since the shock absorbing member of the present invention has a substantially semi-elliptic spherical shape or a substantially semi-oval shape as described above, a shock ( The impact absorbing effect composed of a small amount of material achieves a highly efficient impact absorbing action without reducing the impact absorbing effect due to the direction in which the force is applied.

Further, in the shoe sole of the present invention, a large number of the shock absorbing members having the above-mentioned specific shapes are formed in advance with different materials and / or the same materials in the same shape and size, while the shock absorbing members are provided on the upper surface of the heel portion. A recess is provided in which the member can be exchangeably fitted. When purchasing a shoe having the sole of the present invention, select a shock absorbing member made of a material having a shock absorbing property suitable for the weight of the wearer and prior to wearing the shoe having the sole of the present invention, Fit in the recess of the shoe sole. Further, when the weight of the owner of the shoe having the shoe sole of the present invention changes, the shock absorbing member that has been fitted so far is removed and replaced with a shock absorbing member made of an optimum material. Further, the impact (force) applied to the heel of the shoe is different depending on the purpose of running / walking for business, running / walking for leisure, running / walking for daily life, etc. However, the shock absorbing member made of a material suitable for the shock is replaced. Alternatively, when the shock absorbing member that has been fitted so far is damaged or deteriorated, the shock absorbing member made of the same material as the shock absorbing member is replaced. As described above, in the shoe having the sole of the present invention, it is possible to wear a shoe suitable for each shoe wearer and for the purpose of running / walking of the shoe wearer, and the life of the shoe is increased. The optimum shock absorbing effect can be maintained until it is exhausted.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view for explaining one embodiment of the shoe sole of the present invention. In FIG. 1, 1 is a heel part,
A shock absorbing member 2 having a specific shape according to the present invention is embedded in a recess formed on the upper surface of the heel portion 1. The shape of the shock absorbing member 2 is shown in FIGS. Figure 2 (A)
Is a plan view, FIG. 2B is a sectional view taken along line AA of FIG.
FIG. 2C is a sectional view taken along line BB of FIG. Figure 2
As shown in (A) to (C), in the shock absorbing member 2, the upper surface 21 has a planar shape so as to follow the upper surface shape of the heel portion 1, and the lower surface 22 has a spherical shape, and as a whole, the rear side is rearward. It has a roughly semi-egg shape that bulges (on the rear end of the heel).
In addition, in the example shown in FIGS.
3 is provided with a flange portion 24, and by making the contact area between the heel portion 1 and the impact absorbing member 2 large, the impact absorbing member 2 is firmly fixed to the heel portion 1 and the heel portion is also provided. The discomfort of the foot contact at the heel portion 1 due to the embedding of the shock absorbing member 2 having a hardness different from that of the portion 1 is eliminated.

When, for example, an impact (force) in the direction of arrow F in FIG. 3 described above is applied to the heel portion 1 configured as described above, the impact (force) is the maximum thickness d of the impact absorbing member 2. The spherical lower surface 22 of the shock absorbing member 1
From the side to the lower part of the heel part 1, as shown by the arrow in FIG. Even if the direction F of this impact (force) changes (the angle α shown in FIG. 3 changes), the maximum thickness d of the impact absorbing member 2 exists within the range of this change, so the impact absorption is reduced. The effect does not decrease.

In the examples of FIGS. 1 and 2, the shock absorbing member 2 having a substantially semi-oval shape is shown. However, the shock absorbing member according to the present invention is
The shape is not limited to this, and may be a substantially semi-ellipsoidal shape including a substantially hemispherical shape.

A plurality of different shock absorbing members 2 are prepared in advance from different materials and / or the same materials (for example, rubber, urethane, other materials, or these materials having different densities). An optimal material is provided on the upper surface of the heel portion 1 by providing a recess corresponding to the shape of the lower surface of the impact absorbing member 2 in accordance with the weight of the shoe wearer or the running / walking purpose as described above. Replace the shock absorbing member 2 made of
Fit in the recess of the heel part 1. For example, a person having a heavy weight is suitable for a shock absorbing member made of a hard material, and a person having a light weight is suitable for a shock absorbing member made of a soft material.

Further, in order to facilitate the above-mentioned exchange / fitting work and to secure a strong fitting strength, although not shown in the drawings, small dovetail type projections are provided at several places on the lower surface of the shock absorbing member 2, The heel portion 1 is provided with a concave portion that fits the protrusion, or the lower surface 22 of the shock absorbing member 2 and the lower surface 22
Various kinds of means are used, such as attaching a velcro tape to the upper surface of the concave portion of the heel portion 1 to which is fitted, and further attaching a double-sided adhesive tape to the lower surface 22 side of the shock absorbing member 2.

Further, in the example of FIG. 1, the case where the present invention is applied to a shoe sole having a heel portion 1 having a steep step is shown, but the shoe sole of the present invention is a so-called ship bottom shape having a heel portion having no step. Of course, it can also be applied to shoe soles of injection molding, shoe soles made by injection molding, and shoe soles made by hand-molding.

[0018]

As described in detail above, according to the shoe sole of the present invention, the shock absorbing member has a substantially semi-elliptic spherical shape or a substantially semi-oval shape, and the impact (force) is exerted at the maximum thickness portion of the shape. Since the absorption is performed, the material volume of the shock absorbing member necessary for effective shock absorption is the same as that of the conventional shock absorbing members 02 to 04 shown in FIGS. Can be much smaller than the material volume required in. As a result, the material capacity of the heel is reduced to an extremely small amount, and the shock absorbing effect with high efficiency can be obtained, and the heel, the stepless part,
In particular, it is possible to sufficiently secure the rigidity and strength of the heel portion or the stepped portion having a steep step. Further, since the required material capacity of the shock absorbing member can be reduced, the material cost of the entire shoe can be kept low even if a high cost shock absorbing member is used. Further, even if the direction in which the impact (force) is applied changes, the impact can be absorbed with high efficiency. In addition, according to the present invention, a large number of different materials and / or the same material are formed in advance as impact absorbing members in the same shape and dimension, and a concave portion corresponding to the lower surface shape of the member is provided on the upper surface of the heel portion. According to the weight of the wearer of the shoes,
Alternatively, the shoe can be replaced with a shock absorbing member made of an optimum material according to the purpose of running / walking, which is suitable for each shoe wearer, and suitable for the running / walking purpose of the shoe wearer. You can wear it. Moreover, when the shock absorbing member is damaged or deteriorated, it can be replaced with a new shock absorbing member, and the optimum shock absorbing effect can be maintained until the life of the shoe is exhausted.

[Brief description of drawings]

FIG. 1 is a cross-sectional view illustrating an embodiment of the shoe sole of the present invention.

2 is a detailed view of the shape of the shock absorbing member used in the shoe sole of the present invention shown in FIG. 1, (A) being a plan view and (B) being a plan view;
Is a sectional view taken along the line AA of (A), and (C) is a sectional view taken along the line BB of (A).

FIG. 3 is an explanatory diagram showing a direction of impact applied to a heel portion when a shoe wearer runs or walks.

FIG. 4 is an explanation showing an example of a conventional shock absorbing member for shoes,
(A) is a sectional view and (B) is a plan view.

FIG. 5 is an explanation showing an example of a conventional shock absorbing member for shoes,
(A) is a sectional view and (B) is a plan view.

FIG. 6 is an explanation showing an example of a conventional shock absorbing member for shoes,
(A) is a sectional view, (B) is a plan view, and (C) is a sectional view showing another installation mode of the shock absorbing member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heel part 2 Shock absorbing member 21 Upper surface of shock absorbing member 22 Lower surface of shock absorbing member 23 Schematic semi-oval shape part of shock absorbing member 24 Flange part around shock absorbing member

Claims (2)

[Scope of utility model registration request] 1. A shock-absorbing member having a substantially semi-elliptical spherical shape or a substantially semi-oval shape whose lower surface has a spherical shape is obtained by measuring the major axis of the member.
A shoe sole characterized by being embedded almost in the center of the heel so that the direction is oriented in the front-back direction of the shoe sole. 2. A shock absorbing member made of a different material and / or the same material is replaceably fitted in a recess in the upper surface of the heel corresponding to the shape of the lower surface of the shock absorbing member. Item 1. The shoe sole according to item 1.