JPH09309306A - Anti-skid pin block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display anti-skid performance on ice and snow and prevent the generation of a road surface flaw and environmental pollution by dust without chipping the road surface even on a dry road by embedding an anti-skid pin in special rubber to form an integrated anti-skid pin formed body, and fixing this integrated anti-skid pin formed body fittingly to a formed body holder. SOLUTION: Since an anti-skid pin 3 is supported by special rubber 2 hardened at the temperature, close to a freezing point, or lower, the characteristic of soft rubber is maintained by heating of tire rubber 7 during travel in a normal temperature area or on the dry road surface. The supported anti-skid pin 3 therefore fluctuates easily so as to avoid resistance easily at the time of coming in contact with the road surface, and chipping of the road surface is nullified. On ice and snow of a freezing point or lower, the special rubber 2 rises in hardness, and fluctuation in response to action such as resistance from the outside becomes markedly difficult. The anti-skid pin 3 therefore keeps an upright protruding state, and a grounding state becomes a state of biting into the icy road surface, so that resistance rises markedly, and anti-skid performance is displayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has an anti-slip property on ice and snow outdoors in snowy and cold regions, and has the function of eliminating the anti-slip property when running on a dry road surface even at low temperatures. The present invention relates to an anti-slip pin block attached to a snow tire and a snow chain.

[0002]

2. Description of the Related Art A snow tire in which a metal stud is fitted on a tire has a remarkable effect on the slip resistance on snow and snow, and has been used for a long time. Similarly, snow chains fitted with metal studs have also been used to contribute to slip resistance.
However, even on a road surface where ice and snow disappeared, the metal studs had a remarkable anti-slip effect, and as a result, the road surface was scraped off, scratched, and dust was scattered, so that its use was limited.

Further, a rubber spike with a sensor "Ice Sensor" (trade name) in which a material that hardens at a temperature below freezing is replaced with a metal stud is used in part, but it has a slippery effect on the metal stud. Is beyond reach.

[0004]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention In a snow tire or snow chain using a conventional metal tack or the like, on a road surface on which ice and snow disappears, a dry road surface, and a road surface at a temperature above freezing point, the road surface is scraped off by the metal tack, In addition, with rubber spikes with a sensor "Ice Sensor" (trade name) in which a material that hardens at a temperature below freezing is replaced with a metal tack, the slip resistance on ice and snow does not reach the slip resistance of the metal tack. At present, measures for snow tires, snow chains, etc. that are kind to the road and have sufficient anti-slip properties have not yet been established.

SUMMARY OF THE INVENTION The present invention has an object to make up for the above-mentioned two drawbacks. The present invention exhibits anti-slip properties on ice and snow and does not scratch the road surface even on a dry road surface. The purpose is to prevent dust pollution, and on ice and snow, the anti-slip pins not only exhibit sufficient anti-slip properties, but also on roads without ice and snow, it is possible to significantly scrape off the road surface with anti-slip pins. (EN) Provided are an anti-slip pin block having both reducing functions, a snow tire and a snow chain fitted with the anti-slip pin block.

[0006]

[Means for Solving the Problems] Anti-slip pins are similar to metals, sintered metals, ceramics, glass fibers, etc., although they have remarkable anti-slip properties, but on the other hand, they come into direct contact with the road surface and are damaged by scraping. There are drawbacks, including conventional spike pins.

As a special rubber that supports these anti-slip pins, it is stronger and more stable than the rubber of the tire body due to a glass transition region at a temperature below the freezing point and a remarkable increase in hardness and a small deformation rate. It has the property of holding anti-slip pins. Further, the fact that the deformation rate is smaller than that of the rubber of the tire main body has a feature of giving the anti-slip pin a protruding property. However, in the normal temperature range, it is necessary to support the anti-slip pins more variably and reduce the ability to scrape off the road surface due to the ground contact of the anti-slip pins more significantly by making the hardness lower than that of the rubber of the tire main body or lower than that of the rubber of the tire main body. .

As the special rubber used for that purpose, a rubber mainly composed of polynorbornene or a rubber mainly composed of epoxidized natural rubber and a compounding material for rubber is mixed, and the temperature is from -5 to 5 ° C or higher. The area is soft rubbery,
The hardness is 30 to 55 (JIS K6301 hardness A according to the spring type hardness tester) and has flexibility, and is -5 to 5 ° C.
In the low temperature region below, the hardness is 65 to 95 (JIS K6
301 hardness A (according to a spring hardness tester) is utilized.

An anti-slip pin is embedded in this special rubber simultaneously with press vulcanization to obtain an anti-slip pin molded body. Further, the slip-proof pin molded body is fitted and fixed to the molded body holder to complete the slip-resistant pin block. The protruding end surface of the anti-slip pin is preferably near the same level as the end surface of the special rubber, and is set near the same level as the ground contact surface of the tire even when it is fitted and fixed to the tire. 60 to 120 pieces are evenly distributed and fitted to the required positions on the tire or snow chain.

The anti-slip pin is embedded in a special rubber to form an anti-slip pin molded body, which is further fitted and fixed to a molded body holder to form an anti-slip pin block. According to the above, it becomes easy to physically and physically remove it.

Moreover, the molded body of the anti-slip pin held by the molded body holder contributes to the upright stability of the anti-slip pin with respect to the ground road surface at temperatures below the freezing point such as on snow and snow. Even if the tire is set to the same level as the ground contact surface without protruding, the compression deformation of the special rubber is smaller than the compression deformation of the tire body rubber. Since the amount is also reduced, the anti-slip effect can be exhibited.

On a road surface other than on ice, snow, etc., the internal heat of the rubber of the tire body (which is said to be about 60 to 70 ° C.) generated by the driving and running of the automobile causes the low temperature road below the freezing point and the low temperature air flow. Even if exposed to, the anti-slip pin block does not exhibit anti-slip properties, so the scraping of the ground contact road surface is drastically reduced.

[0013]

Since the present invention is based on the fact that the anti-slip pins are supported by the special rubber, the special rubber does not change due to the heat generation of the tire rubber or the tire chain rubber main body during traveling in the normal temperature range or the dry road surface. Since the characteristics of the soft rubber are maintained, the supported anti-slip pins are also easily changed, and when the road surface comes into contact, the resistance is easily avoided, and the skid of the road surface by the anti-slip pins is almost eliminated.

On ice or snow below the freezing point, the hardness of the special rubber rises, making it extremely difficult for the special rubber to change as a response to the action of resistance from the outside, and the anti-slip pin maintains the upright protruding state to keep the ground. The condition is such that it is bitten into the ice and snow road surface, the resistance is remarkably increased, and the slip resistance is similar to that of the conventional spike pin.

The anti-slip function of the anti-slip pin block on ice and snow is important, but in the case where there is no ice or snow on the road surface in the temperature range above or below the freezing point, Alternatively, on a dry road surface or the like, the skid of the road surface with the anti-slip pin block must be minimized.

One of the effects of reducing the scraping is that the special rubber of the anti-slip pin block behaves elastically in the temperature range above the freezing point due to the heat generated by the tire rubber body during running. Located in the molded body holder itself. The bottom of the molded body holder has a recess in the periphery, and since the molded body of the slip prevention pin has a flat bottom surface,
When it is inserted into the holder, a space (10) is formed between the molded body holder and the bottom surface of the molded body of the anti-slip pins.

The void (10) serves as a void (10) for escape due to compression due to contact with the ground contact surface when the special rubber behaves like a soft / elastic rubber at a temperature, and also for contact with a slip prevention pin. When the resistance from the ground is relieved by the slipping of the anti-slip pins, it is provided so that a greater resistance relaxation can be obtained by allowing the special rubber part to escape into the void (10). is there.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to an enlarged sectional view and FIG. Place the anti-slip pin (3) with the diameter of the grounding surface of 3.5φ on the special rubber (2) at the center position of the special rubber (2) with the outer diameter of 10φ.
Simultaneously with vulcanization and molding, the slip-resistant pin molded body (4) is prepared. The anti-slip pin molded body (4) is subjected to an adhesive treatment,
At the same time, an iron molded body holder (5) with an inner surface bonded
Then, the anti-slip pin block (1) having a height of 10.5 mm is obtained.

A hole having a diameter of 12φ and a depth of 10.5 mm is provided at 120 important points of the tire tread portion (6) for automobiles, and 2.5 mm from the bottom of the hole is further expanded to a diameter of 16φ to prevent slipping. The pin block (1) is used as an accommodation hole (9). The bottom surface and the side surface of the accommodation hole (9) portion provided in the tire tread portion (6) and the metal surface of the anti-slip pin block (1) are bonded and dried appropriately, and then the anti-slip pin block (1) is accommodated in the accommodation hole (9). To obtain a snow tire (7) which is fitted and fixed to and has skid protection on ice and snow. The method for attaching the anti-slip pin block (1) to the snow chain (8) for tires is the same as the method for attaching to the tread tire portion (6) for automobiles.

The anti-slip pin (3) and the molded body holder (5) used in the anti-slip pin block (1) in the present embodiment are made of high carbon tool steel and heat treated. The anti-slip pins (3) may be made of other metals, sintered metals, ceramics, glass fibers or the like. As the special rubber (2) that hardens below the temperature near the freezing point, a compound obtained by kneading a compound having the following composition was used and molded by a mold. At that time, the anti-slip pins (3) were embedded to obtain anti-slip pin molded bodies (4).

Epoxidized natural rubber ^{* 1} 80% by weight Styrene-butadiene copolymer rubber 20〃 Zinc white 5〃 Stearic acid 2〃 Vulcanization accelerator DM 2〃 Vulcanization accelerator TS 0.2〃 Silica (white carbon) 20〃 Polyethylene glycol 2〃Cold-resistant plasticizer ^{* 2} 20〃Sulfur 2.5〃 * 1: Epoxidation rate of 50% was used. * 2: Dioctyl adipate was used.

[0022]

The effect of the present invention is that when automobiles are driven in winter, the metal rivet system of snow tires causes dust damage due to road surface damage caused by scraping dry road surfaces and scraped road surface substances. As a countermeasure, a rubber spike "ice sensor" (trade name) with a sensor replacing a metal tack has been invented. However, since the anti-slip properties of the invention on ice and snow may be inferior to the anti-slip properties of metal tacks, the anti-slip properties on ice and snow may also be satisfied, and dust or the like may be generated when driving a car. There was a problem as a pollution-free tire that does not generate The present invention solved that.

In the present invention, the anti-slip pins are first embedded in a special rubber to form an anti-slip pin molded body, which is further fitted into a tire or the like.
It is used by being fitted and held in a molded body holder that facilitates detachment and then fitted and used in an automobile tire or a snow chain. At temperatures below the freezing point, where the special rubber becomes a hard rubber and the anti-slip pins are fixed and held upright, the anti-slip pins exhibit their anti-slip properties and contribute to the safety of vehicle operation. On a dry road surface where there is no ice or snow even at temperatures below the freezing point, the heat generated by the tire rubber body is transferred by the rotation of automobile tires, etc., and there is no heat dissipation to the ice and snow, so the temperature of the special rubber rises above the freezing point and prevents slipping. The special rubber that supports the pin becomes soft rubber. As a result, deformation of the special rubber portion or compression deformation can be facilitated by providing a void in the molded body holder. Therefore, it becomes possible to substantially eliminate the resistance of the road surface to the anti-slip pins and to significantly reduce the dust pollution caused by road surface grinding and dust.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a snow tire and a snow chain fitted with a slip prevention pin block.

FIG. 2 is a plan view of FIG. 1;

[Explanation of symbols]

 1 Anti-slip pin block (4 + 5) 2 Special rubber 3 Anti-slip pin 4 Anti-slip pin molded body (2 + 3) 5 Molded body holder 6 Tire tread part 7 Snow tire 8 Snow chain 9 Storage hole 10 Void part

Claims (3)

[Claims] 1. A molded body holder (5) in which a slip resistant pin (3) is embedded and integrally molded in a special rubber (2) which is hardened below a temperature near the freezing point and which is fitted and held. Anti-slip pin block (1) fitted and fixed. 2. A skid-proof pin block (1) according to claim 1 is fitted and fixed to a key portion of a tire tread portion (6) of an automobile or the like, and skid-proof on ice or snow below a temperature near a freezing point. A snow tire (7) characterized by exhibiting its properties. 3. An anti-slip pin block (1) according to claim 1 is fitted and fixed to a key portion of a snow chain for a tire of an automobile or the like to provide anti-slip properties on ice or snow below a temperature near a freezing point. A snow chain (8) characterized by being demonstrated.