JPS6041122Y2 - footwear soles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a footwear sole that prevents rolling or lateral vibration during running and facilitates bending at bends.

In conventional shoes, by attaching a highly rigid heel counter to the heel of the shoe, the shape of the heel of the shoe can be maintained and the foot can be protected.

However, in recent years, in an effort to further protect the feet and reduce the shock to the feet when driving on cobblestone roads or concrete paved roads, the soles of shoes have changed to sponge soles, and in addition, the soles of shoes have been made of extremely thick layers according to their functions. It is designed to have a sponge bottom.

In this case, the outsole (grounded outsole) is either solid or a sponge layer with good abrasion resistance, and one or two sponge layers with good cushioning properties are usually inserted between the outsole and the cover.

This layer is hereinafter referred to as a cushion layer.

The movement of the load on the foot during running coincides with the movement of the sole of the shoe in contact with the ground.

In other words, for example, when landing from the outside of the rear heel, a large but momentary load is applied to the rear heel, and then the landing progresses along the outside of the sole from the short bounce ball to the ball of the toga leg, and the landing is completed. After that, I mainly move forward by kicking the ground with the sway of the legs of Toga Fu and the 2nd and 3rd g1l.

If the landing moves from the outside of the rear heel to the outside of the sole, the outside of the thick sponge sole will be compressed more than the inside, causing the heel of the shoe to tilt outward, reducing the force exerted on the foot. In addition, the thick sponge reel, especially the cushion layer, is deformed outward, which increases the force exerted on the foot as it tries to turn the foot outward. The foot will swing outward significantly.

As a result, the wearer's feet sway sideways and become unstable, promoting foot fatigue and reducing speed, making it impossible for the wearer to wear the shoes with peace of mind.

In addition, since this cushion layer requires a certain degree of hardness and is quite thick, it requires bending force that can resist the repulsive force of the cushion layer itself at the bending part of the foot. This has disadvantages, such as the extra load placed on the shoes, which makes the feet feel tired and reduces the feeling of wearing them.

This invention allows you to wear shoes with thick sponge soles.
It is flexible with no resistance to bending at the stepping part, and prevents the wearer's foot from swinging sideways at the heel, increasing speed, reducing foot fatigue, and providing a good feeling of wear. It is also an object of the present invention to provide a footwear sole that provides a sense of stability and can be worn with peace of mind.

The footwear sole of the present invention has at least one polymeric foam layer between the outsole (ground sole) and the cover, and the polymeric foam layer surrounds the front portion with an appropriate width. The hardness of the front periphery, the heel periphery that surrounds the heel with an appropriate width, and the other central part is set to be higher in the order of the central part, the front periphery, and the seed layer edge. The bends at the periphery are narrowed or cut.

The polymer foam layer of the present invention corresponds to the cushion layer itself or a part thereof, and is a cushion layer that exists over the entire sole, and is different from a cushion layer that exists in a wedge shape only at the heel.

As in the above-described structure of the polymer foam layer, each of the three sections is made to have a hardness difference between the sections by using three types of materials having different hardnesses, either singly or in combination.

The hardness of the members forming each part is determined by the Asker hardness scale C.
In terms of type values (the same applies hereafter), the central member forming the center part is 20 to 45 degrees, the front peripheral member forming the front peripheral part is 30 to 55 degrees, and the seed peripheral member forming the seed layer side part is 40 degrees.
It is appropriate that the hardness is in the range of ~75 degrees, and by selecting and combining members within this range, the hardness increases in the order of the central part, front peripheral part, and seed layer side part.

Examples of polymeric foams include foams of polyethylene, ethylene◆vinyl acetate copolymer (EVA), nanopolyolefin resins, rubber, and mixtures thereof.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a vertical cross-sectional view of the sole of the first embodiment, in which the outsole 6 is made of solid rubber, and on top of it is made of EVA as a polymer foam layer 1.
Sponges are laminated and glued together.

FIG. 2 is a plan view thereof.

As shown in FIG. 2, the polymer foam layer 1 includes a front peripheral member 20 for forming a front peripheral part 2 surrounding the front peripheral part with a certain width, and a seed layer side part 3 with a certain width. A surrounding seed peripheral member 30 and a central member 40 forming the other central portion 4
The front peripheral member 20 has a hardness of 40 degrees, the seed peripheral member 30 has a hardness of 5 degrees, and the central member 40 has a hardness of 30 degrees.
It is made of foamed EVA.

The polymer foam layer may be formed by cutting each member from a foamed EVA board and combining them together.The unfoamed EVA assembly of each member is cut into a predetermined shape, and then press-heated in a mold. It can also be obtained by integrally bonding at the same time as foaming.

The bent portion of the front periphery 2 may be narrowed, as shown in FIG. 2, or cut at - or more points, as shown in FIGS. 4 and 6.

When cut, the part belongs to the central part and is occupied by the central member.

As mentioned above, FIG. 2 is a plan view of the first embodiment of the present invention.
A front peripheral part 2 is formed of an EVA foam board of 0 degrees, and is joined to a seed layer side part 3 formed of an EVA foam board of 55 degrees of hardness, which surrounds the heel part with an appropriate width.

A central portion 4 surrounded by both is filled with an EVA foam board having a hardness of 30 degrees, and is joined to the front peripheral portion 2 and the seed layer side portion 3.

The width of the treading part of the front peripheral part 2 is formed to be narrow, and therefore, the width of the central part 4 is formed to be wide by filling this part.

The widths of the front peripheral part 2 and the seed layer side part 3 are set so that these parts slightly fit within the outline of the foot.

However, the seed layer side portions 3 are formed with different widths in the thickness direction.

3a-3C are side views showing central member 40 of various shapes.

The central member 40 shown in Figures a and b has the same outline as the central part 4 as shown in Figure 2, and has the upper or lower heel part cut out in an appropriate shape such as a wedge shape.

The central member 40 is attached to the upper or lower surface of the heel portion of the central member 40.
A desired central portion 4 is constructed by joining a wedge-shaped front peripheral member 20 following the heel contour.

The central member 40 in FIG. 0 has the same outline as the central portion 4 as shown in FIG. 2, with the heel portion removed.

The front peripheral member 20 having a shape corresponding to the cut heel part is joined to the heel side end surface of the central member 40 to obtain the central part 4.

FIG. 4 is a plan view of the second embodiment, and FIG. 5 is a longitudinal sectional view of FIG. 4.

In this embodiment, the treading part of the front peripheral part 2 has a cut-off shape, and the central part 4 is expanded to both end surfaces of the treading part to fill the notch 5.

The second embodiment, as shown in FIGS. 4 and 5, is an example of a cushion layer that is thickened from the rear of the non-stepping part.

The front peripheral member 20 forming the front peripheral part 2 is formed by integrally providing a projecting wall of an appropriate width around a thin flat plate with a bottom shape, excluding the stepping part, according to the thickness shape of the cushion layer, and corresponding to the seed layer side part 3. The upper part is formed into a shape with a notch.

Separately, a horseshoe-shaped seed periphery 30 forming the periphery 3 is made and joined onto the heel portion of the front periphery 20.

A central member 40 is created in the shape of the remaining central portion 4, and is fitted and joined into the front peripheral member 20.

Thereafter, the outsole 6 is adhered to the lower surface of the polymer foam layer 1 made of the above-mentioned members.

A foamed rubber plate is used for the polymer foam layer 1 in this example, and the hardness is 45 degrees for the front peripheral part, 60 degrees for the seed peripheral part, and 35 degrees for the central part.
It was a degree.

If the front peripheral member 20 is made in the shape of a thin bottom-shaped flat plate as a base and a projecting wall is integrally provided around the periphery as in this example, workability such as positioning and joining of the seed peripheral member 30 and the central member 40 will be improved, Further, even if there is a notch in the tread bending part of the front peripheral part 2, the number of parts does not need to be increased.

Note that the notches of the tread bending part of the front peripheral part 2 can be made in two places, as shown in FIG. 6, or in more places.

As mentioned above, the footwear sole of the present invention has a cushion layer, and the entire center part of the cushion layer is made of a foam material such as polyolefin with extremely low hardness, so it cushions and absorbs external shocks and protects the feet. In addition, in the bending part corresponding to stepping, the width of this central part is the widest, so even if this central member is thick, it has low bending resistance and can be bent extremely easily, reducing foot fatigue. In addition, if the upper or lower surface of the heel is replaced with a front peripheral member, the heel of the front peripheral part and the surrounding area can be replaced with a front peripheral member. The difference in hardness between the heel and the area around the heel has been alleviated, significantly improving the feeling of wear.

Since the front peripheral part of the cushion layer has a medium hardness, it protects the central part, which has a low hardness, and has the ability to absorb and absorb external shocks, and also acts to prevent lateral vibration.

Next, since the heel area has a high hardness around the heel, it protects the center area, which has a low hardness, and holds and absorbs the load on the outside of the heel when landing, preventing sideways swing, and allowing the foot to sway while running. Speed is increased without being hit, there is no risk of falling due to foot contact, and the shoes are stable and comfortable to wear, allowing for safe wear.

As described above, the shoe sole of the present invention bends without resistance at the stepping part and prevents the wearer's foot from swinging sideways at the heel due to the combination of the hardness, material, and shape of each member. This has the effect of increasing speed, reducing foot fatigue, giving a good feeling and stability, and allowing the wearer to wear the shoes with peace of mind.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view showing the first embodiment of the present invention, Fig. 2 is a plan view of Fig. 1, Fig. 3 a''-c is a side view showing another embodiment of the central part, and Fig. 4 The figure is a plan view showing a second embodiment of the present invention, FIG. 5 is a longitudinal sectional view of FIG. 4, and FIG. 6 is a plan view showing another embodiment. 1... Polymer foam Layer, 2...Front periphery, 3.
... Heel peripheral part, 4 ... Center part, 5 ... Notch part, 6 ... Outsole, 20 ... Front peripheral member, 30 ...
... Seed peripheral member, 40... Central member.

Claims (1)

[Scope of utility model registration request] There is at least one polymer foam layer between the outsole and the heel, and the polymer foam layer surrounds the front periphery with an appropriate width and the heel area with an appropriate width. The hardness of the three areas around the heel and the other central area is set to be higher in the order of central area, front area, and heel area.The bending area around the front of the waist is narrowed or cut. Covered bottom.