JP2775548B2 - Mounting structure of rubber spike pins - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a spike pin made of rubber, and more particularly to a structure in which a rubber for forming a spike pin has a property of curing at a low temperature.

[0003]

2. Description of the Related Art In order to prevent a tire from slipping on icy and snowy roads, there has been one in which a metal spike pin is attached to a tread of the tire. However, metal spike pins cut the road surface and generate dust, causing pollution problems.
Use has been regulated.

[0003] Therefore, so-called studless tires have been improved in which the properties of the rubber itself for forming the tires are kept soft even at a low temperature, and the adsorptivity to ice and snow surfaces is increased. On the other hand, there has been an attempt to mold the spike pins with other materials instead of metal. For example, there is a technique using synthetic resin or hard rubber.

[0004] Among those forming a spike pin using hard rubber as a material, rubber having the property of softening at room temperature but hardening at low temperatures and changing to metallic hardness is used in the present invention. It has been developed by the inventor of the application (Japanese Patent Application Laid-Open No. 2-84459).

[0005]

A spike pin formed of rubber that cures at low temperatures softens at room temperature and cures on icy and snowy roads (of course, at low temperatures), thus acting as a spike pin. In addition, friction of the tire with the road surface due to rotation of the tire and internal heat generation of the tire due to vibration may affect the curing of the spike pin.

Accordingly, the present invention is intended to prevent the spike pins from softening due to such heat and enhance the effect of the spike pins using rubber which cures at a low temperature.

[0007]

SUMMARY OF THE INVENTION The present invention is characterized in that a spike pin formed of rubber having a property of curing at a low temperature is mounted on a tire tread and has a cooling space for cooling the spike pin. It is assumed that.
The cooling gap may be formed between the outer surface of the spike pin and the tire tread, or may be formed in the spike pin itself.

[0008]

When there is ice and snow on the road surface, the tires and spike pins that are in contact with the road surface are cooled, and the spike pins whose temperature has decreased are hardened. Also, even if energy is accumulated inside the tire tread rubber due to the rotation of the tire and heat is generated, snow and ice on the road surface shred the snow and ice finely due to the compression and frictional resistance of the tire rotation, load, and the snow and ice. Are clogged in the cooling gap, and perform the cooling action of the spike pins.

On the other hand, when there is no ice or snow on the road surface, the spike pins are softened by the tires that have accumulated heat due to rotation or the like and heat generated from the tire and the contact portion from the road surface and do not exert a spike effect.

[0010]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a partial surface view of a tire in a state in which a rubber spike pin 1 having a changed hardness is attached to a tire tread 2. The spike pin 1 has a substantially Y-shaped cross section, and has three surfaces 3 of a cylindrical body. The arc-shaped notch surfaces 4, 4, and 4 are left except 3, 3,
Cooling gaps 6, 6, 6 are formed with the recess 5 of the tire tread 2.

FIG. 2 is a simplified side view showing the relationship with the road surface 7. The tip of the attached spike pin 1 may be flush with the outer periphery of the tire, and the tire tread rubber 2 is compressed and deformed by the vehicle load. Then, the spike pin 1 hardened by the ice and snow 8 on the road surface 7 (even due to the outside temperature) pierces the ice and snow, and performs a spike action. It has a cooling effect.

The cross-sectional shape of the spike pin 1 and the shape of the recess 5 into which the spike pin 1 of the tire tread 2 is inserted are as follows:
It can be formed arbitrarily, and as long as it has a gap 6 even partially between the outer periphery of the spike pin 1 and the recess 5 of the tire tread 2 as a result of attachment.

FIG. 3 is a front end view of a spike pin 1 showing another embodiment, and a groove 6A is partially formed from the front end to the base.
FIG. 4 shows a cooling space 6 formed by forming a concave hole 6B.

[0014]

As described above, according to the present invention, a spike pin formed of rubber having a property of curing at a low temperature is attached to a tire tread with a cooling space, so that, for example,
Even if the internal heat generated by the rubber of the tire tread affects the temperature sensed by the spike pins due to the rotation of the tire, the cooling effect is exhibited by ice and snow clogging the cooling gap, and the hardness of the spike pins is reduced. It exerts the effect of maintaining and preventing softening.

Accordingly, the present invention maintains the performance of a spike pin using rubber which has a property of curing at low temperatures, ensures vehicle safety on icy and snowy roads, preserves the road surface and prevents the occurrence of dust pollution. What you get.

[Brief description of the drawings]

FIG. 1 is a partial surface view of a tire showing one embodiment of the present invention.

FIG. 2 is a simplified side view showing the relationship between the tire of the present invention and a road surface.

FIG. 3 is a front end view of a spike pin showing another embodiment of the present invention.

FIG. 4 is a front end view of a spike pin showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spike pin 2 Tire tread 6 Cooling gap 7 Road surface 8 Ice and snow

Claims (3)

(57) [Claims] 1. A tire in which a spike pin formed of a rubber having a property of curing at a low temperature is mounted on a tire tread, the rubber spike pin having a cooling space for cooling the spike pin. Wearing structure. 2. The mounting structure for a rubber spike pin according to claim 1, wherein the cooling gap is provided between the outer surface of the spike pin and the tire tread. 3. The mounting structure for a rubber spike pin according to claim 1, wherein the spike pin itself has a cooling space.