JP2581017Y2 - Tread member for tire anti-slip device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tread member for a tire anti-skid device which prevents material destruction by spike pins.

[0002]

2. Description of the Related Art Conventionally, a ladder type tread member known as a nonmetal tire anti-slip device is a molded article in which both sides of a reinforcing layer are covered with a rubber layer, and is formed on a rubber layer on a ground contact surface side. The spike pins are buried.

[0003]

When a conventional tread member is mounted on a heavy load tire such as a truck or a bus and travels on a dry road surface, the spike pins are inclined because the heat generated by the tread member decreases the modulus of the rubber layer of the tread member. As a result, the flange portion is shaken, and the reinforcing material and the rubber layer adjacent to the spike pin flange portion on the back side (tire tread surface side) of the tread member are damaged by the flange portion, so that the material of the tread member is broken, and as a result, The spike pins fall off to the back side of the tread member, which is a major cause of shortening the durability life of the tread member.

[0004] This invention solves such a problem,
It is an object of the present invention to provide a tread member for a tire anti-skid device in which the flange portion is prevented from being shaken due to the inclination of a spike pin.

[0005]

According to the present invention, in order to achieve the above object, tread hooks are provided at both ends in a longitudinal direction, and both sides of a reinforcing layer which is folded back around both tread hooks are made of rubber. In a tread member of a tire anti-slip device, which is covered with an elastic material such as a synthetic resin and embeds a spike pin in a covering layer on the contact surface side, a spike pin is provided in the covering layer on the contact surface side of the tread member. A stabilizer made of a fiber material, which penetrates through the shank portion and covers the surface of the flange portion on the grounding surface side with a predetermined area larger than the outer circumference, is arranged discontinuously for each spike pin .

[0006]

According to the tread member of the present invention, even if the tread member generates heat and the modulus of the material of the coating layer decreases, the stabilizer maintains the modulus higher than that of the coating layer for a long time. The sway of the portion is suppressed, and the reinforcing layer and the covering layer adjacent to the flange portion are not damaged.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1 (half part side view) and FIG. 2 (expanded plan view), the tread member 10 of the present invention has a tread portion 11 at the center in the longitudinal direction, an inside portion 12 at one end in the longitudinal direction, and the other end. The portion is an outside portion (not shown) having the same shape as the inside portion 12, and the inside portion 12 and the outside portion have an elongated mountain shape bent in the same direction from both ends of the tread portion 11.

As shown in FIG. 3 (partial sectional view), the tread member 10 has coating layers 14 and 15 made of an elastic material such as rubber or synthetic resin on both sides of a reinforcing layer 13 such as a carcass material of a pneumatic tire. A tread hook 16 is attached to the inside portion 12 and the outside portion, and the end portion of the reinforcing layer 13 is wound around the inside portion 12 and the outside portion. A spike pin 17 is embedded in the coating layer 14 of FIG.

In the covering layer 14 on the ground surface side of the tread member 10, a stabilizer 18 covering the surface of the flange portion 17a on the ground surface side with respect to the flange portion 17a of the spike pin 17 is disposed through the shank portion 17b. I have.
The stabilizer 18 is made of a material having a higher modulus than the material of the coating layers 14 and 15, and is cut discontinuously by a predetermined area larger than the outer circumference of the flange portion 17 a of the spike pin 17. As the material of the stabilizer 18, for example, a carcass material of a blind weave used for a tire cord is suitable, but in addition, a plain weave fabric, another fiber material, or a synthetic resin plate may be used. Regarding the size of the stabilizer 18,
5 to 5 times more than the outer circumference of the flange 17a of the spike pin 17.
It is preferable to use one having a diameter of 10 mm larger.

A plurality of the above tread members 10 are arranged at predetermined intervals, and the tread hooks 16 of the inside portion 12 and the outside portion are caulked and fixed to the side ropes 20, thereby providing a ladder-type tire slip. A stop device is configured. When the tire anti-skid device configured as described above is mounted on a heavy-duty tire such as a truck or a bus and travels on a dry road surface, the tread portion 1 of the tread member 10 generates heat by friction with the road surface.
1, the modulus of the coating layer 14 on the ground plane side is reduced. However, the stabilizer 18 disposed in the coating layer 14 has a higher modulus than the coating layer 14, and the flange portion 17 a of the spike pin 17 Since the spike pin 17 is locally covered, the swing of the flange portion 17a due to the inclination of the spike pin 17 is reliably suppressed. For this reason, the spike pin 17 does not damage the reinforcing layer 13 disposed close to the spike pin 17 or damage the covering layer 15 on the tire tread surface side. A situation in which the member 10 slips out of the tire tread surface side and falls off does not occur.

[0011]

As described above, according to the present invention, the coating layer of the tread member generates heat when the vehicle runs,
Even if the modulus is reduced, the stabilizer that locally covers the surface of the flange portion of the spike pin on the grounding surface side with a predetermined area maintains a higher modulus than the coating layer. Oscillation is suppressed, and it is possible to prevent material destruction due to damage to the reinforcing layer and covering layer on the tire tread surface side, and thereby prevent the spike pins from falling off to the tire tread surface side, and the durability life of the tread member is improved, In particular, an optimum tread member can be obtained in a tire anti-skid device used for heavy duty tires such as trucks and buses.

[Brief description of the drawings]

FIG. 1 is a side view showing a half of the outer shape of a tread member according to the present invention.

FIG. 2 is a plan view showing the tread member of FIG. 1 in a developed state.

FIG. 3 is an enlarged sectional view taken along line AA of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Tread member 13 Reinforcement layer 14 Covering layer on ground contact side 15 Covering layer on tire tread side 16 Tread hook 17 Spike pin 17a Flange portion of spike pin 17b Shank portion of spike pin 18 Stabilizer

Claims (1)

(57) [Scope of request for utility model registration] A tread hook is provided at both ends in the longitudinal direction, and both sides of a reinforcing layer provided to be folded around both tread hooks are covered with an elastic material such as rubber or synthetic resin, and a tread hook is provided on the ground side. In a tread member of a tire anti-skid device having a spike pin embedded in a coating layer, a surface of the tread member on a ground surface side of a flange portion penetrating a shank portion of the spike pin in a coating layer on a ground surface side of the tread member. A tread member for a tire anti-slip device, characterized in that a stabilizer made of a fiber material, which covers a predetermined area larger than the outer circumference, is arranged discontinuously for each spike pin .