JPH10327906A - Shock absorber for soles of soles - Google Patents

Abstract

(57) [Summary] [Problem] To provide a shock-absorbing material for heels of soles, which has improved shock-absorbing property and resilience function and has excellent heel stability upon landing. An inner peripheral wall (2) is provided at the center of an annular air tube (2).
1 and the bottom wall 22 are formed, and the shock absorbing material piece 3 is inserted in close contact with the inner peripheral wall 21 and the bottom wall 22;
This is buried in the heel of the shoe sole for use. For this reason, the shock absorbing material piece 3 that has been raised and deformed in the outer peripheral direction by the shock pressure applied to the heel portion of the shoe sole is subjected to the air pressure of the annular air tube 2 acting by the remaining shock pressure that could not absorb the shock. Push back inward through 21 to quickly restore it to its original state. At the time of landing, the heel portion is sunk in the center position of the annular air tube 2 and wrapped around the annular air tube.
The heel portion is supported by the support 2 to prevent the heel from being shaken.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock absorber mounted on a heel of a shoe sole.

[0002]

2. Description of the Related Art The applicant has previously disclosed in Japanese Utility Model Publication No. 2-21925 the lower part of the heel bone of a piece of a shock absorbing material for a heel portion of a shoe sole in which a low-rebound resilient foam is interposed and bonded to a rigid plate. A shock absorbing material for a heel portion of a shoe sole has been proposed in which a portion corresponding to a protruding portion is cut out, and the cut-out portion is filled with a gel-like viscoelastic substance by providing a gap in an outer portion thereof. The sole with such a shock absorbing material,
The gel-like viscoelastic material easily undergoes viscous deformation in response to impact pressure,
The remaining impact pressure that cannot be absorbed by the gel-like viscoelastic material is transmitted to the shock-absorbing material pieces located outside the gel-like viscoelastic material, and the low impact pressure is interposed and bonded between the shock-absorbing material pieces and the rigid plate. It is absorbed by the resilient foam.

However, the shock absorbing material for the heel portion of the shoe sole is filled with a gel-like viscoelastic substance in the notch with a gap provided on the outer side thereof. It took time for the substance to self-recover, which resulted in a lack of resilience, a reduction in kick force and a waste of physical strength. In addition, these conventional shoe sole heel shock absorbing materials have a complicated shock absorbing structure such as a low rebound resilient foam interposed between a rigid plate and a rigid plate to absorb the landing shock pressure during jumping. The manufacturing process is time-consuming and causes high manufacturing costs.

[0004]

SUMMARY OF THE INVENTION The present invention eliminates the above-mentioned drawbacks and provides a shock absorbing material for a heel portion of a shoe sole which has both shock absorbing properties and rebound resilience, a simple shock pressure absorbing structure and excellent heel stability. It is intended to provide.

[0005]

According to the present invention, there is provided a hollow recess 5 formed by an inner peripheral wall 21 and a bottom wall 22 of the air tube 2 at the center of the annular air tube 2. The shock absorbing material for a heel portion of a shoe sole is characterized in that the shock absorbing material piece 3 is inserted in close contact with the inner peripheral wall 21 and the bottom wall 22 of the present invention.

[0006]

According to the present invention, the shock absorbing member 3 is closely fitted and inserted into the hollow depression 5 having the inner peripheral wall 21 and the bottom wall 22 formed in the center of the annular air tube 2, and the impact pressure is applied. Viscous deformation (raised portion) of the shock absorbing piece 3 in the outer peripheral direction is caused by an inward air pressure acting on the remaining impact pressure that cannot be absorbed by the shock absorbing piece 3 and transmitted to the annular air tube 2. The viscously deformed shock absorbing piece 3 is pushed back through the peripheral wall 21 to quickly restore the original state. Further, at the time of landing, the impact absorbing piece 3 inserted into the hollow depression 5 of the annular air tube 2 is dented by impact pressure, so that the lower part of the heel is temporarily located at the center of the annular air tube 2. It is in a state of being wrapped around.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the accompanying drawings, FIG. 1 is a perspective view showing a state in which a shock absorbing material for a sole of a shoe according to the present invention is partially cut away, and FIG. It is sectional drawing of the state which showed the assembly of the absorber. FIG. 3 is a cross-sectional view of a relevant part in a state where impact pressure is applied to a shoe in which the shock absorbing material for a heel part of the shoe shown in FIG. 1 is attached to a heel part. Sponge rubber or a gel-like viscoelastic substance is used for the shock absorber piece 3 of the present invention. The gel-like viscoelastic substance is an intermediate substance layer between a solid rubber or a synthetic resin and a liquid rubber or a plastisol, and specifically, a liquid polyisoprene rubber, a liquid isoprene rubber, a liquid polyurethane rubber, a liquid silicone rubber, or the like. It is obtained by partially crosslinking liquid rubber with a crosslinking agent of a usual amount or less which is added in molding of solid rubber, or gelling a plastisol such as vinyl chloride plastisol. In the embodiment of the present invention, the impact absorbing piece 3 is formed to have a diameter of about 30 to 45 m.
m and a cylindrical shape having a thickness of 10 to 15 mm.
May be appropriately formed into an elliptical shape, a polygonal shape, or the like. Further, the gel-like viscoelastic substance may be one which is entirely sealed with a sheet of soft vinyl chloride or the like having transparency for easy handling.

The elastic air tube 2 of the present invention is made of a flexible, gas-tight plastic material which does not leak air, and seals a pair of material sheets around their peripheral edges to seal the air. It may be made by a blow molding method. Further, a valve (not shown) may be provided in the annular air tube 2 so that a predetermined amount of gas can be injected. The ring-shaped air tube 2 is formed such that the diameter of the tube in which the air is sealed is substantially equal to or slightly larger than the thickness of the shock absorbing piece 3. In the annular air tube 2 of the present invention, the central inner peripheral wall 21 is formed into a substantially cylindrical shape, and a bottom wall 22 is provided on the central bottom surface by sealing with the same material as the air tube main body to form a hollow submersible. A depression 5 is formed. When the bottom wall 22 of the annular air tube 2 of the present invention has a planar shape, an adhesive can be easily applied to the outer surface thereof with a brush, and the bonding area with the shoe sole 4 can be increased.
Furthermore, if the bottom wall 22 is formed thin, the shock absorbing material piece 3 to be inserted can have the maximum thickness, and the effect of absorbing shock pressure can be further enhanced. If the annular air tube 2 is made of a transparent material, the shock absorbing piece 3 can be seen from the see-through window of the shoe sole to be more visual.

In the shock absorbing material 1 for a heel part of a shoe sole according to the present invention, a shock absorbing piece 3 is closely attached to an inner peripheral wall 21 and a bottom wall 22 of a concave portion 5 formed in the center of an annular air tube 2. The assembly is completed. The shock absorbing material for a heel part of a shoe sole 1 of the present invention
Are bonded to the inner surface of the heel of the shoe sole formed in advance and fixed, or temporarily fixed to the midsole of the cap hung on the last with an adhesive tape or the like, and the shoe sole is injection-molded. It is used buried in the bottom inner surface. In the shoe sole heel impact absorbing material 1 of the present invention, since the impact absorbing piece 3 is prevented from falling from the lower surface of the annular air tube 2 by the bottom wall 22 of the annular air tube 2, the shoe sole can be prevented. Installation work can be done easily. In the shoe sole heel shock absorbing material 1 of the present invention, if a hole for inserting the shock absorbing material piece 3 is provided in the shoe sole, the shock absorbing material pieces having different shock absorbing rates can be replaced.

[0010]

The present invention is constructed as described above, and has a hollow depression 5 formed at the center of an annular air tube 2 by an inner peripheral wall 21 and a bottom wall 22 of the air tube. Since the shock absorbing material piece 3 is inserted in close contact with the inner peripheral wall 21 and the bottom wall 22, the shock absorbing material piece 3 that has undergone viscous deformation (raised portion) in the outer peripheral direction due to the impact pressure is subjected to shock absorption. The remaining air pressure which cannot be absorbed by the piece 3 is an annular air tube 2.
The outer peripheral side surface of the viscously deformed shock absorbing piece 3 is pushed back inward through the inner peripheral wall 21 by the air pressure of the annular air tube 2 which is transmitted to and acts on the annular air tube 2, thereby forcibly and quickly restoring the original state. The shock absorption and the resilience function can be enhanced, and the resilience becomes the propulsive force and the kick force is not attenuated, so that the consumption of physical strength is reduced. Further, the shock absorbing material 1 for a heel part of a shoe sole according to the present invention comprises a recess 5 of an annular air tube 2.
Since the shock absorbing material piece 3 is inserted into the shock absorbing material piece 3, the shock pressure absorbing structure is simple, and the shock absorbing material piece 3 can be replaced. The present invention further relates to a bottom wall 2 of the annular air tube 2.
2 can be easily fixed in the sole of the shoe by bonding, and the manufacturing process does not require much work. In the present invention, the impact absorbing piece 3 is dented by impact pressure at the time of landing, so that the heel portion is temporarily wrapped at the center of the annular air tube 2 and supported by the annular air tube 2. As a result, heel blur is prevented, and heel stability at the time of landing is achieved.

[Brief description of the drawings]

FIG. 1 is a sketch showing a state in which a shock absorbing material for a heel part of a shoe sole according to the present invention is partially cut away.

FIG. 2 is a cross-sectional view showing a state where the shock absorbing material for a heel part of a shoe sole of FIG. 1 is assembled.

FIG. 3 is a cross-sectional view of a main part in a state where impact pressure is applied to a shoe in which the shock absorbing material for a heel part of the shoe sole of FIG. 1 is mounted on a heel part.

[Explanation of symbols]

 1. 1. Shock absorber for soles of shoes 2. Annular air tube 21. Inner peripheral wall 22. Bottom wall 3. 3. Shock absorber piece (gel-like viscoelastic substance) Shoe sole 5. Depression

Claims (1)

[Claims] 1. A hollow depression 5 comprising an inner peripheral wall 21 and a bottom wall 22 of an air tube 2 is formed at the center of an annular air tube 2, and the inner peripheral wall 21 of the concave portion 5 A shock absorbing material for a heel portion of a shoe sole, wherein a shock absorbing material piece 3 is inserted in close contact with a bottom wall 22.