JPS5925203Y2 - Footwear soles with reinforcement pieces - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a footwear sole having reinforcing pieces at required portions of the midsole.

In recent years, in an effort to further protect the feet and reduce the impact on the feet when driving on stone blocks or concrete paved roads, the soles of footwear have changed to sponge soles, and in addition, the soles of footwear have been changed to sponge soles, with multiple layers of extremely thick sponge depending on the function. Laminated soles are increasingly being worn.

However, because midsoles that are close to the foot are made of soft sponge, the wearer's weight can be concentrated in the stepping and heel areas, where the lower back quickly weakens and elasticity is drastically reduced, causing the wearer's feet to weaken. If the sponge bottom is damaged, it will not be able to perform its intended function as a sponge bottom.

In order to overcome these drawbacks, hollow parts were formed in the required parts of the midsole, and after this midsole was attached to the wedge or the sole of the mold, a piece of hard sponge different from the midsole was pasted to the hollow part at the end. A laminated sole was proposed, but as shown in Fig. 2, the side edges 20 and 21 of the midsole after forming the hollow part are extremely thin, which, combined with the flexibility of the midsole itself, makes the sole weak. They break due to small external forces, are troublesome to handle, are difficult to maintain their normal shape, and require a high level of skill to adhere, making it impossible to obtain a laminated bottom as designed.

In order to solve the above problems, the present invention devises a footwear sole having a reinforcing piece.

The present invention provides a footwear sole made by laminating a sponge board-shaped midsole, a heel wedge, and an outsole, with a hollow part provided at the required part of the midsole, and a separate part of the same shape as the hollow part. This is a footwear sole having a reinforcing piece in which the reinforcing piece is inserted, and the hollow part and the reinforcing piece are locked by a combination of a plurality of concave and convex parts provided on the circumferential surfaces thereof.

Examples will be described below with reference to the drawings.

As shown in FIGS. 1 to 4, the midsole 1 consists of a bottom-shaped sponge board 2 and a reinforcing piece 4. The bottom-shaped sponge board 2 is punched into a bottom shape from a wide sponge board. At the same time as the punching, a hollow part 3 is punched and formed at the required part, such as the tread part or the heel part, and an appropriate number of convex parts 7 are formed on the inner circumference of the twenty punched parts 3. .

As the material for the midsole 1, various rubber foams, polyethylene or polyethylene-vinyl acetate copolymer foams, polyurethane foams, and other elastic or deformation recovery foams are used.

The reinforcing piece 4 is a hard member molded to fit the hollow part 3 of the thick sponge board 2, and has a recess 8 formed in its peripheral edge to engage with the projection 7.

The material of the reinforcing piece 4 is the same as that of the bottom-shaped sponge board 2, but it is preferably made of a material that is harder, more elastic, and more durable than the material of the bottom-shaped sponge board 2.

An appropriate number of convex portions 7 and reinforcing pieces 4 protruding from the inner circumference of the hollow portion 3
The design of the convex-concave engagement with the recessed portion 8 bored in the peripheral edge of can be changed to convex-concave engagement.

It may be selected as appropriate depending on the position and shape of the hollow portion 3.

Of course, the combination of the convex portions 7 and the concave portions 8 may be combined over the entire circumference, or may be partially unevenly distributed for different purposes.

The combined shape of the convex portion 7 and the concave portion 8 is preferably an undercut shape, as shown in FIGS. 2 and 3, because it can be securely locked.

The bottom-shaped sponge board 2 is not limited to being punched and formed from a single wide sponge board, but may be individually molded. The reinforcing piece 4 was inserted into the hollow part 3 of 2, and the reinforcing piece 4 was locked by the combination of the convex part 7 of the bottom-shaped sponge plate 2 and the recessed part 8 of the reinforcing piece 4, or vice versa. Since it is a footwear sole having a reinforcing piece formed by pasting the midsole 1 to a heel wedge 5 and an outsole 6 by a conventional method,
The durability and elasticity of the midsole 1 are increased by replacing the parts of the midsole 1 that are repeatedly subjected to concentrated loads with the reinforcing pieces 4, which are harder and more resilient than the bottom-shaped sponge plate 2 of the midsole 1, and are It can reduce the impact on the feet and increase the sense of stability when wearing them.

In addition, the bottom-shaped sponge plate 2 and the reinforcing piece 4 of the midsole 1
is held securely by simply locking the convex portion 7 and the concave portion 8, and in particular prevents the bottom-shaped sponge plate 2 from deforming in the lateral direction, and prevents the inner peripheral surface of the hollow portion 3 and the reinforcing piece 4 from deforming in the lateral direction. Combined with the bonding force with the outer peripheral surface, the reinforcing piece 4 is almost integrated, and the reinforcing piece 4 does not easily fall off from the bottom-shaped sponge plate 2.
Footwear having reinforcing pieces as designed, capable of quickly and easily carrying out handling during transport and movement, applying glue to the midsole 1 itself, polymerizing and adhering to the heel wedge 5 and outsole 6, etc. The bottom can be molded.

[Brief explanation of the drawing]

Fig. 1 is a side view showing one embodiment of the present invention, Fig. 2 is a plan view of the midsole with a reinforcing piece engaged, Fig. 3 is a plan view showing another reinforcing piece, and Fig. 4 is a plan view of the midsole with the reinforcing piece engaged. It is an AA sectional view of the figure. 1... Mid sole, 2... Bottom shaped sponge board, 3... Hollowed out part, 4... Reinforcement piece, 5... Heel wedge, 6...outsole, 7...convex portion, 8...concave portion.

Claims (1)

[Scope of utility model registration request] In a footwear sole formed by laminating a sponge plate-like midsole 1, a heel wedge 5, and an outsole 6, a hollow part 3 is provided at a required part of the midsole 1, and a hollow part 3 having the same shape as the hollow part is provided in the hollow part. A footwear sole having a reinforcing piece in which a body reinforcing piece 4 is inserted, and the hollow part 3 and the reinforcing piece 4 are locked by a combination of a plurality of uneven parts provided on the circumferential surfaces thereof.