JPH07256825A - Structure of anti-slip rubber molding - Google Patents

Abstract

PURPOSE:To provide an all-weather tire showing anti-slip action on an ice and snow surface in winter and becoming a usual tire in seasons other than winter. CONSTITUTION:The outside of a tire A is formed from a thin rubber layer 2 hardened at temp. below the freezing point and the inside thereof is formed from a usual soft and semi-hard rubber layer 1 low in hardness change. When the atmospheric temp. becomes the freezing point or lower in winter, the outside rubber layer 2 is hardened and the corner parts of the uneven parts of the tire A become edges to show anti-slip action.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a rubber molded product such as a tire or a shoe sole, which is prevented from slipping on snow or icy roads.

[0002]

2. Description of the Related Art Conventionally, in order to prevent slipping on a snowy or snowy surface, unevenness in shape of a portion of a tire or shoe sole that comes into contact with the ground has been devised, and slip resistance against the snowy or snowy surface has been improved. However, rubber has a large slip resistance when dry,
Since there is a property that slip resistance becomes small when wet, winter tires and shoe soles have softened rubber hardness to increase the contact area with the road surface, increase the thickness of the block, make fine cuts, etc. It has improved slip resistance. As a result, special rubber compounding and construction for winter is required, and two types of tires and shoe soles are required, one for seasons other than the minimum winter season.

[0003]

From the above points, the present invention is
The present invention works to prevent slipping of tires and shoe soles on the surface of snow and snow in winter, and to provide a structure of an all-weather rubber molded product that becomes a normal tire or shoe sole in seasons other than winter.

[0004]

In order to solve the above problems, the present invention is characterized in that a thin rubber layer which hardens below freezing is formed on the outside of the main body, and a normal rubber layer is formed on the inside of the main body. It is a thing.

[0005]

To explain the operation of the present invention, a thin rubber layer that hardens below freezing is formed on the outside of the main body of a rubber molded article such as a tire or shoe sole, and a normal rubber layer is formed on the inside of the main body. When the temperature drops below freezing, the thin rubber layer on the outside directly contacts the outside air and snow, and only that part hardens.

Therefore, when the thin rubber layer on the outer side of a new article is not worn yet, the inner rubber layer is deformed by the load, so that the corners of the uneven portion of the tire or the sole crush snow or ice, and the edge It is effective and prevents slipping.

Further, even if the portion in contact with the ground is abraded and the rubber layer on the inside is exposed, the side portion of the design shape of the ground contact portion is hardened below freezing, so that the edge effect is exerted as before and slippage is prevented. To prevent.

Since the thin rubber layer on the side portion is worn in parallel with the inner rubber layer, its edge effect is not lost until the uneven portion disappears.

Further, in seasons other than winter when the temperature is high, both the inner rubber layer and the outer rubber layer function as normal soft rubber.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a sectional view showing an embodiment of the tire of the present invention, FIG. 2 is a partial sectional view showing the action of the same when it is worn, FIG. 3 is a sectional view showing an embodiment of the shoe sole of the present invention, and FIG. FIG. 6 is a partial cross-sectional view showing the action of the when worn.

In the figure, A is a tire, B is a shoe sole, 1 is a rubber layer inside tire A, 2 is a thin rubber layer outside tire A, 3 is a rubber layer inside shoe sole B, 4 is a thin rubber layer on the outer side of the sole B. 5 is the uneven portion of the tire A, 6 is the sole B
The concave and convex portions of (a) are corners of the concave and convex portions 5 and 6.

The inner rubber layers 1 and 3 of the main body of the rubber molded article such as the tire A and the shoe sole B are made of soft, semi-hard unvulcanized rubber with little change in hardness, and the outer thin rubber layers 2 and 4 are Unvulcanized rubber that cures below freezing is used, and both are simultaneously vulcanized and molded.

Rubber which cures below freezing is obtained by plasticizing polynorbornene with an aromatic oil, and improving the second-order transition point within the range of 0.degree. This is a vulcanized rubber composition blended in a ratio of 50 parts or more with respect to 100 parts, and the present applicant has already applied for this rubber as Japanese Patent Application No. 63-235771.

[0014]

According to the present invention, the outside of the main body of a rubber molded article such as a tire or shoe sole is hardened below freezing to exert an edge effect, and slip on a snowy surface can be prevented. Also, since it functions as a normal soft rubber at temperatures other than winter, it can be used throughout all seasons, and it does not require a separate type for winter as in the past, only one type is needed, which is economical. It is a useful invention that has a great effect.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of a tire which is a rubber molded product of the present invention.

FIG. 2 is a partial cross-sectional view showing the operation of the tire, which is a rubber molded product of the present invention.

FIG. 3 is a vertical sectional front view showing an embodiment of a shoe sole which is a rubber molded product of the present invention.

FIG. 4 is a partial cross-sectional view showing the action of a shoe sole which is a rubber molded product of the present invention.

[Explanation of symbols]

 A tire B shoe sole 1 inner rubber layer 2 outer rubber layer 3 inner rubber layer 4 outer rubber layer

Claims (1)

[Claims] 1. A structure of a rubber molded article which prevents slipping, characterized in that a thin rubber layer that hardens below freezing is formed on the outside of the main body, and a normal rubber layer is formed on the inside of the main body.