JPH0411401B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a spike tire used when a vehicle runs on an icy and snowy road.

[Conventional technology]

2. Description of the Related Art It has been known to use spiked tires in which a plurality of spikes protrude from the tread of the tire in order to prevent the tire from slipping when a vehicle runs on an icy or snowy road.

The ideal characteristics for a spiked tire are that the spike pin maintains the desired correct posture, the tire has low mechanical impedance and flexibility in the radial direction, and the tire has mechanical resistance in the trunk direction. It is desirable that the spike pin has a large target impedance and is rigid, and that the protrusion amount of the spike pin is maintained at an appropriate amount even against tire wear.

A conventional spike tire has a structure in which a spike pin 102 is driven into a snow tire 101 and protrudes ideally from the tire surface by about 1.5 to 2.0 mm, as shown in FIG. spike pin 1
A tip 103 made of cemented carbide or the like is usually attached to the tip of the shank 104 of 02 for wear resistance.By concentrating the load of the tip 103, the tip 103 is driven into the ice and the ice is sheared. Friction is obtained by

[Problem to be solved by the invention]

However, in the conventional spiked tire described above, not only does the amount of protrusion of the spike pin 102 vary considerably depending on how it is driven into the snow tire 101, but also the amount of protrusion of the spike pin 102 varies considerably during use. The shank may become thinner due to dirt getting in between the tires, the shank may be tilted against the tread 105 of the snow tire 101, or the shank may be knocked down, or the mount portion of the shank may become loose and wobble. As a result, it is difficult to maintain the effectiveness of the spike pin, it is difficult to maintain the optimum amount of protrusion of the spike pin, and furthermore, it is difficult to wear out the spike pin 102 in accordance with the wear of the tread 105. Therefore, on a road surface without ice or snow, the spike pin 102 scrapes the road surface and scatters it into the atmosphere as dust, causing a pollution problem. As a countermeasure for this, currently we are reducing the protrusion amount of the spikes to 1.0 to 1.5 mm,
Alternatively, attempts have been made to reduce the number of spikes from 154 spikes per tire to 122 spikes per tire, but this has not really solved the pollution problem.

It has also been proposed to maintain the protrusion amount of the spike pin at an optimum amount by constructing the shank with a soft material such as aluminum and causing the shank to wear out along with the tire tread, but Since the problem of falling has not been solved, this method has not essentially solved the problem.

This invention was made in view of the above-mentioned circumstances, and it is possible to prevent the shank from falling down by maintaining the posture of the spike pin as desired, and to reduce the amount of protrusion of the spike pin in a spiked tire, and to prevent the shank from falling down. The mechanical impedance of the mounting part (mounting part) can always be maintained in an optimal state.
To provide a snow spike tire capable of maintaining a spike pin load sufficient for the spike pins to bite into relatively soft ice by the necessary amount, obtaining sufficient frictional force, and causing no damage to a paved road surface. The purpose is to

[Means to solve the problem]

Corresponding to this purpose, the spiked tire of the present invention comprises a spike shank made of plastic or hard rubber having a hardness higher than that of the tire base material, and the shank is adhered or fused to the tire base material. a spike pin is attached to the shank protruding from an upper end in the axial direction, and the shank includes a plurality of flanges arranged at intervals in the axial direction and each extending in the radial direction; The flange is characterized by being provided with a notch that penetrates in the axial direction.

[Effect]

These spike pins are embedded in the surface portion of the snow tire to form a snow spike tire.
The shank and the snow tire are bonded or fused to prevent a gap from forming between them. The multiple flanges increase the area of bonding and fusion surfaces with the snow tire to maintain optimal mechanical impedance.

〔Example〕

Hereinafter, details of the present invention will be explained with reference to the drawings showing one embodiment.

In FIGS. 1 and 2, reference numeral 1 denotes a snow spike tire, and the snow spike tire 1 has a snow tire 2 with spike pins 3b implanted in its surface.

The spike pin 3b has a shank 4b. The shank 4b is made of hard rubber or plastic having a hardness equal to or greater than that of the base material of the snow tire 2, and has a hole 5 opening at the upper end in the center in the axial direction. What is particularly important is that the shank 4b is adhered or fused to the base material of the snow tire 2. If the shank 4b is glued to the snow tire 2, the shank 4b
An adhesive is applied between b and the snow tire 2,
Further, when the shank 4b and the snow tire 2 are fused together, it is necessary to select a material for the shank 4b whose surface layer portion will be melted by heat during vulcanization, as will be described later. A chip 6 is driven into the hole 5. The chip 6 is made of hard metal.

The shank 4b has flanges 7,8. The flanges 7 and 8 are provided with a notch 11 that passes through the shank 4b in the axial direction. Furthermore, the flange 8a provided at the base of the shank 4c shown in FIGS. 3 and 4 may be constructed by having two continuous leaf springs 14, 15 on both sides 12, 13 facing each other with a gap 17 between them. In this case, the leaf springs 14 and 15 are also formed with cutouts 16a, 16b, and 16c. When this shank 4c is installed in the snow tire 2, both sides 12 and 13 are arranged parallel to the trunk direction.

When the spike pins 3b and 3c as described above are implanted into the snow tire 2, the spike pins 3b or 3c are inserted into the mold during vulcanization of the snow tire 2.
The base material rubber of the snow tire is poured into the mold.

Shank 4b including flanges 7, 8, 8a,
If an adhesive is applied to the surface of the shank 4c, the shank 4b, 4c and the snow tire 2 will be integrally bonded to each other by the adhesive due to the heat generated during vulcanization. If there are flanges 7, 8, 8a, the bonding area becomes larger, and furthermore, the flanges have cutouts 11, 16.
If there are a, 16b, 16c, shank 4
The integration of b, 4c and the snow tire 2 is ensured. Furthermore, in the case of the shank shown in FIGS. 3 and 4, the base rubber of the snow tire also bites into the gap 17 between the leaf springs 14 and 15, so that the snow tire 2
The integration with the shank 4c becomes even more reliable.

In the snow spike tire 1 having such a structure, the load is concentrated on the spike pins 3b and 3c, and the tips 6 bite into the ice and friction can be obtained by the resistance caused by the shearing of the ice. At this time, the shank 4b, 4c of the spike pins 3b, 3c are integrally bonded to the snow tire 2, and the shank 4
Sand and dust etc. do not enter between the snow tires 2 and the shank 4b, 4c, and the shank 4b, 4c does not become thinner. Therefore, the attachment of the shank will not loosen with respect to the snow tire 2, and the spike pins 3b, 3c will not tilt or fall, ensuring reliable positioning.

Since the positioning of the spike pins 3b and 3c is reliable, the protrusion amount of the spike pins 3b and 3c can be set to an optimal value, and the spikes function on ice and snow surfaces, and loose spikes can be removed from the tread. It does not cause damage by whipping.
Furthermore, since the shank is made of plastic or hard rubber and wears out as the tread of the snow tire 2 wears, the amount of protrusion of the spike pin can be maintained at the required optimum value.

Moreover, as a result of the shank 4b, 4c being integrally bonded or fused to the snow tire 2, the snow tire has a structure that is relatively soft in the radial direction and rigid in the traction direction. This tendency is reflected in flange 7,
This is noticeable when 8 is installed, but the
As shown in the figure, the flanges include leaf springs 14 and 1.
5 is used, both sides 12 and 13 are aligned in the traction direction, and the base rubber of the snow tire 2 is poured between the leaf springs 14 and 15, this is even more noticeable.

〔Effect of the invention〕

As is clear from the above explanation, the present invention can maintain the desired posture of the spike pin and prevent the shank from falling. It is possible to maintain the mechanical impedance at the optimum state at all times, maintain the spike pin load sufficient for the spike pin to bite the required amount into relatively soft ice, and obtain sufficient frictional force. It is possible to obtain a tire that does not damage the paved road surface.

[Brief explanation of drawings]

Figure 1 is a perspective view of a spiked tire, Figure 2 is a cross-sectional view of the spiked tire shown in Figure 1, Figure 3 is a perspective view of another spiked tire, and Figure 4 is a spiked tire shown in Figure 3. A cross-sectional explanatory view of a tire, and FIG. 5 is a cross-sectional explanatory view of a conventional spiked tire. 1...Snow spike tire, 2...Snow tire, 3...Spike pin, 4...Shank, 5...Hole,
7, 8...flange, 11...notch, 12,13...
Both sides, 14, 15...plate spring, 16a, 16b, 1
6c...Notch, 17...Gap.

Claims (1)

[Claims] 1 The shank of the spike is made of plastic or hard rubber with a hardness greater than that of the tire base material,
The shank is glued or fused to the tire base material, a spike pin is attached to the shank protruding from the upper end in the axial direction, and the shank is arranged at intervals in the axial direction, each having a diameter. A spike tire comprising a plurality of flanges projecting in the axial direction, the flange being provided with a notch penetrating in the axial direction.