JPH08150814A - Antiskid device of tire - Google Patents

Abstract

PURPOSE: To enable a car run on such undrivable icy and snow-clad road surface even in a studless tire, and to reduce a noise as well as to improve driving quality. CONSTITUTION: A spike pin 9 being projected out of a tread surface is embedded in an antiskid device base body 5 made up of covering a metal or organic reinforced cord, being installed in a circumferential groove 4 to be formed in the circumferential direction in succession to a tread surface 3 of a pneumatic tire 2, by a covering material consisting of a rubber or plastic material, while this antiskid device base body is formed into endless ring form. In this connection, setting to the tire is easily performable by way of deflation of air in a tire tube.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention makes it possible to run on a slick snowy road surface which is hard to run even on studless tires formed for ice and snow roads, and is easy to put on and take off. The present invention relates to anti-skid equipment for tires.

[0002]

2. Description of the Related Art Conventionally, in order to run on a snowy road in winter,
A so-called tire chain in which a short link chain is assembled into a ladder shape or a net shape and wound around a tire peripheral surface is used. Since such a tire chain is formed by using metal, it has drawbacks that when the tire chain is attached to the tire, the riding comfort of the vehicle is reduced and the running noise is increased.

[0003]

SUMMARY OF THE INVENTION In order to solve one of these problems, for example, as disclosed in Japanese Utility Model Publication No. 5-35843, the main body of a tire is provided with a non-metallic material such as synthetic resin. Although the one formed is also appearing, this one has a ladder shape or a net shape, and when the anti-slip device of such a configuration is formed by using a non-metallic material, it is left side when mounted. The metal fittings on the right and the metal fittings on the right side must be tightened alternately in a well-balanced manner, which requires time and effort.
Further, there is a problem that running noise on a dry road surface cannot be suppressed due to the presence of the lateral member.

The inventor pays attention to a circumferential groove that circulates around the tread surface of a tire, and mounts a slip preventer on the circumferential groove so that only spikes are formed so as to protrude from the tread surface at the time of mounting. In addition, the anti-slip device is formed into a ring shape, and the endless annular shape is obtained by assuming that the anti-skid device is submerged and held inward of the tread surface while being filled with the tire inner pressure, and further that the air pressure is lowered and the tire is unloaded. The present inventors have completed the present invention by finding that the structure described above can be adopted and the above problems can be solved.

INDUSTRIAL APPLICABILITY The present invention can maintain durability and can be attached and detached, and in particular, by mounting it on a studless tire, it is possible to greatly improve the running performance on ice and snowy road surfaces, especially on uphill roads, and to reduce running noise. It is an object of the present invention to provide a slip preventive device for a tire which can reduce the ride quality and improve the riding comfort.

[0006]

DISCLOSURE OF THE INVENTION The present invention is a slip preventer for a tire which is mounted in a circumferential groove formed continuously in the circumferential direction on a tread surface of a pneumatic tire and which extends in the longitudinal direction. In addition to embedding a spike pin protruding from the tread surface in the anti-skid device base in which the reinforcing cord of metal or organic fiber is covered with a covering material made of rubber or a synthetic resin material, the anti-skid device base has an endless annular shape. It is a featured anti-skid device for tires.

The reinforcing cord can be formed by winding a long cord material a plurality of times.

[0008]

Since it has an endless annular shape and is mounted in the circumferential groove, there is no connecting portion, ride comfort is enhanced, and passing noise can be reduced. Moreover, since there is no connecting part, there is no risk of damage from the connecting part.

Since the tire is mounted on the assumption that the air pressure of the tire is lowered, it is easy to mount and dismount, and under normal internal pressure, it has a strong fitting force with the circumferential groove. It is installed.

Since the anti-skid base body is mounted in the circumferential groove of the tire, it does not protrude laterally from the sidewall portion unlike the conventional anti-slip device in the form of a ladder or a net, so that it can be attached to the tire. There is no danger of interfering with the vehicle body when installed. In addition, it is possible to avoid contact between the skid protection base and the road surface during running, to eliminate abrasion damage to the base, and to improve durability.

Further, since the spike pin protrudes from the tread surface, the spike pin can grip the snow and ice, and enhances braking performance and climbing performance on the ice and snow road.

When the anti-skid device of the tire of the present invention is attached to a studless tire, the performance can be further improved in combination with the running performance of a snow-covered road having only the studless tire.

When the reinforcing cord is formed by winding a long cord material a plurality of times, the slippery base of the anti-skid device is less stretched with time, and the durability can be further improved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings by taking as an example the case of being mounted on a pneumatic tire formed as a studless tire.

1 to 4, a tire slip preventer 1 is
A spike pin 9 projecting from the tread surface 3 is provided on a slipper base 5 that is mounted in a circumferential groove 4 formed in the circumferential direction that is continuous with the tread surface 3 of the pneumatic tire 2.

In the present embodiment, the pneumatic tire 2 is formed as a studless tire for ice and snow roads, and as shown in FIGS. 2 and 3, the tread portion 1 forming the tread surface 3 is described.
2 is formed as a pneumatic tire having sidewall portions 13 and 13 extending inward in the tire radial direction from both ends of the tire 2 and bead portions 14 and 14 located at inner ends of the sidewall portions 13 and 13 in the radial direction. In addition, the tire 2 passes from the tread portion 12 through the sidewall portion 13 to the bead portion 14
The toroidal carcass 16 is folded back around the bead core 15 and the belt layer 17 is arranged on the outer side in the radial direction and inside the tread portion 12.

In the present embodiment, the carcass 16 is composed of two carcass plies. In this carcass ply, the carcass cord is 70 in this embodiment with respect to the equator C of the tire.
Forming a sheet body in a so-called radial or semi-radial direction arranged at an angle of 90 ° to 90 ° and covered with a topping rubber, and as a carcass cord, an organic fiber cord such as nylon, polyester, rayon, aromatic polyamide or steel Code is adopted.

The belt layer 17 is composed of two belt plies in this embodiment. These belt plies are made of nylon, polyester, rayon, aromatic polyamide or other organic fiber cords or steel cords between the plies. Arranged in the direction to intersect.

Further, the tread rubber 1 forming the tread surface 4 on the outer side in the radial direction of the belt layer 17 of the tread portion 12.
In the present embodiment, in No. 9, it is composed of a base rubber 19A located on the inner side in the tire radial direction and a cap rubber 19B arranged on the outer side thereof. The cap rubber 19B has a JIS A hardness of 55 at -5 ° C, for example. A soft rubber of up to 61 degrees is used to increase the adhesive friction with the icy road surface to improve the running performance on the icy and snowy road.

The base rubber 19A is a cap rubber 1
In order to compensate for the decrease in pattern rigidity due to the use of soft rubber as described above as 9B, J at -5 ° C is used.
It is formed by using a hard rubber having an ISA hardness of 65 to 70 degrees.

A wide circumferential groove 4 is formed on the tread surface 4.
In this embodiment, the tire is formed continuously on the equator C in the circumferential direction, and between the circumferential groove 5 and the tread edge E, a large number of lateral pattern grooves X and vertical pattern grooves Y are provided. On the tread surface 4, a large number of blocks B surrounded by these vertical and horizontal pattern grooves Y, X, the tread edge and the circumferential groove 5 are formed.
Is formed to enhance the grip force when traveling on soft snow.

The block B is provided with sipings 20 arranged on the peripheral surface in a direction intersecting with the circumferential direction to enhance the frictional resistance on the icy road surface. The circumferential groove 4 has a groove depth GH of 0.06 to 0.14 times a tread width WT which is a distance between the tread edges E in the tire axial direction, and a groove width GW of the tread width WT. Is formed in the range of 0.08 to 0.18 times.

The antiskid 1 of the tire is mounted in the circumferential groove 4. The anti-skid device 1 for a tire comprises an anti-skid base 5 fitted in the groove of the circumferential groove 4, and a spike pin 9 protruding from the anti-skid base 5.

The anti-skid base body 5 is an endless annular body in which a reinforcing cord 7 extending in the longitudinal direction is covered with a covering material made of rubber or a rigid resin material, and is fitted to a rim to which a pneumatic tire is applied. When the normal air pressure is loaded, the outer peripheral surface 5a is slightly depressed from the tread surface 3 and fitted and fixed in the circumferential groove 4. In addition, both side surfaces 5 of the slipper base 5
b and 5b are formed in a shape along the groove wall surfaces 4b and 4b of the circumferential groove 4.

As the reinforcing cord 7, a metal cord such as steel or an organic fiber such as nylon or aromatic polyamide fiber can be adopted. In this embodiment, the reinforcing cord 7 is flexible and has a unit cross-sectional area substantially equal to that of steel. The aromatic polyamide fiber having a tensile strength is wound by being continuously wound a plurality of times with a space in the width direction, in this example, seven times continuously.

In the present embodiment, the covering material 8 has good adhesiveness between the side layer 8A made of hard rubber for the purpose of abrasion resistance on the outer side in the radial direction and the circumferential groove 4 on the inner side in the radial direction. It comprises an inner layer 8B made of rubber having a cushioning property for the purpose of keeping it, and a reinforcing layer 8C which is sheet-like and covers both the outer layer 8A and the inner layer 8B and is reinforced by a canvas.

Further, the cover member 8 has a base 21 as shown in FIG.
Are buried substantially flush with the upper surface of the covering 8 in the longitudinal direction and at intervals, and spike pins 9 made of hard metal such as hardened steel are projected on the base 21. are doing. When the anti-slip body 5 is fitted into the circumferential groove 4, the spike pin 9 has a tip protruding from the tread surface 3 within a range of 2 to 5 mm in a state where the pneumatic tire 1 is filled with regular air pressure. Is preferred.

In order to mount the anti-skid device 1 of the tire thus constructed on the pneumatic tire 2, the pneumatic tire 2
The tread portion 12 can be freely deformed by evacuating the air filled in the tank and setting the internal pressure to a state of 0, whereby the slipper 1 of the tire can be easily mounted in the circumferential groove 4. After the mounting, the pneumatic tire 2 is filled with air pressure again to expand the diameter of the tread portion 12, and the tire slipper 2 of the tire is fixed in the circumferential groove 4 so as not to be relatively rotatable.

When the inner layer 8B is made of rubber having a cushioning property as in the present embodiment, it is easier to insert the tire anti-skid into the circumferential groove 4 and the fitting is ensured. The strength can be further increased.

Further, as shown in FIG. 6, the tire 1 may be provided with a plurality of circumferential grooves 4, and the respective anti-skid gears 1 and 1 of the tire may be attached to the circumferential grooves 4 and 4, respectively.

[0031]

SPECIFIC EXAMPLE The slip preventer for the constitutional tire shown in FIG. 1 was mounted on a tire having a tire size of 165R13 and having the constitution shown in FIGS.
ASA (Japan Automobile Safety Equipment Association) 432-199
The test was conducted according to the test method specified in 2.

[0032]

[Table 1]

As a result of the test, all of the examples are JA
It exceeded the SA standard and was able to obtain the expected results.

[0034]

As described above, the anti-skid device for a tire of the present invention is
By using the above-mentioned structure, it can be more securely attached to tires than conventional slip-proof or net-like anti-skid equipment, improving usability, and braking and starting ability on snow and ice. When used in studless tires, it is possible to run on icy disks and compressed snow, which were impossible to run on studless tires, and its utilization can be further enhanced.

Further, since the base of the skid prevention device is an endless ring, there is no connecting portion and the riding comfort on the dry pavement can be enhanced and noise can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view in the axial direction of the tire, showing the tire mounting tool mounted on a pneumatic tire.

FIG. 3 is a partial plan view thereof.

FIG. 4 is a tire axial sectional view showing another embodiment in which the wearing equipment of the present invention is mounted on a tire.

[Explanation of symbols]

 2 Pneumatic tire 3 Tread surface 4 Circumferential groove 5 Anti-slip base 7 Reinforcement cord 8 Covering material 9 Spike pin

Claims (2)

[Claims] 1. An anti-skid device for a tire, which is mounted in a circumferential groove formed continuously in a circumferential direction on a tread surface of a pneumatic tire, the reinforcing cord being a metal or organic fiber extending in a longitudinal direction. A slip preventive tool for a tire, characterized in that a spike pin protruding from a tread surface is embedded in a slip preventive base body which is covered with a cover material made of rubber or a synthetic resin material, and the slip preventive tool base has an endless annular shape. 2. The slip preventer for a tire according to claim 1, wherein the reinforcing cord is formed by winding a long cord material a plurality of times.