JPS63235108A - Spike tire - Google Patents

Abstract

PURPOSE:To enable the use of a tire as spike and normal tires, in common, by making a tread part of inner and outer layers via a pneumatic chamber in between the layers, embedding spike heads in the inner layer and exposing or concealing spikes via the application or discharge of pressure to and from the pneumatic chamber. CONSTITUTION:When a pneumatic chamber 10c is inflated via the supply of compressed air from a bulb 20B, the inner layer 10B-2 of a tread part 10B shifts inward and spikes 30 are concealed within the tread part 10B. Consequently, the titled tire works as a normal tire. On the other hand, when air has been discharged from the pneumatic chamber 10c, the spikes project from the inner surface of the tread part 10B, giving a spike tire performance. According to the aforesaid constitution, the tire can be put to common use as normal and spike tire.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a spiked tire, and particularly to a spiked tire in which the spikes can freely protrude and retract from the tread surface.

[Conventional technology]

As a conventional spiked tire, for example, one shown in FIG. 4 is known. That is, the spikes 2 are driven into the tread portion 1 of the tire from the outer surface so that the spikes 2 partially protrude.

[Problem that the invention seeks to solve]

However, in such spiked tires, the spikes are fixedly driven in, so once they are
Once attached to a vehicle, the spikes must be kept protruding at all times, and the reality is that they are used as is, even when the road surface is not covered in snow or ice.

Therefore, the use of such spiked tires on ordinary paved roads causes noise, damages the road surface, and causes dust pollution, which is also a social problem.

In view of such conventional circumstances, an object of the present invention is to provide a spike tire that can be easily used as a spike tire or as a regular tire depending on the road surface condition.

[Means for solving problems]

In order to achieve the above object, the present invention makes the tread part double layered into inner and outer layers to form an air chamber between them, and embeds the heads of a plurality of spikes in the inner layer to reduce the pressure in the air chamber. The spikes can be freely retracted from the outer layer of the tread by adjusting the tread.

[For production]

According to the present invention, when the tire is used as a normal tire, the pressure in the air chamber is set higher than the tire air pressure. This causes the inner layer in which the spike head is embedded to move inward of the tire, drawing the spike in.

Conversely, when using the tire as a spiked tire, the pressure in the air chamber is adjusted to be lower than the tire air pressure. In this case, the inner layer is pressed toward the outer layer by the tire air pressure, and the spikes protrude from the outer surface of the tread, functioning as a spiked tire.

Therefore, it is possible to easily switch between normal tires and spiked tires by simply adjusting the pressure in the air chamber.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a sectional view showing an embodiment of the present invention, showing the state as a spiked tire.

In the figure, 10 is a tire and 20 is a road wheel. The tire 10 has a tread part JOB whose bead part 10A is fitted into the rim part 208 of the road wheel 20 and comes into contact with the road surface. The tread portion 10B is formed of two layers, an outer layer 10B-1 and an inner layer 10[1-2, and an air chamber 10C is provided between these layers.

A tube IOC communicates with this air chamber 10C, and the tube 100 is connected to a valve 20B provided on the rim 2OA. Moreover, 20G is a valve for normal tire air pressure adjustment.

30.30... is a spike whose head 30A is embedded in the inner layer 10B-2, and is set to a length that protrudes several millimeters from the outer surface of the outer layer 10B-1 when the pressure of the air chamber 10G is O. has been done.

As shown enlarged in FIG. 2, on the outer periphery of the spike 30,
A sealing soft elastic body 10F is provided to prevent air from leaking from the air chamber 10G through the spike through hole 10E provided in the outer layer 10B-1 of the tread 10 [1, and the lower end of this soft elastic body 10F is 19 layers are attached to the outer layer 10B-1.

Therefore, when the air pressure in the air chamber 10C increases, the soft elastic body 10F is closely pressed against the spikes 30 to perform a sealing action.

Conversely, when the air pressure in the air chamber 10C is lowered, this soft elastic body 10F is crushed by the outer layer 10 1 and the inner layer 10 2,
IQ gives almost no shadow to the protrusion of spike 30.
G is a collar made of gold ash to prevent the spikes 30 from falling down.

The operation of this embodiment having the above configuration will be explained.

When used as a normal tire, compressed air is supplied from the valve 20B as shown in FIG. 3, and the air chamber 10c is inflated to a higher pressure than the tire air pressure. Then, the inner layer 1011-2 of the tread portion ion moves upward in the figure, drawing the spikes 30 inward from the outer surface of the outer layer 10[1-1. At this time, as shown in FIG.
As described above, 0F is tightly pressed against the spike 30 to prevent air from leaking from the air chamber 10G.

Therefore, the user can obtain the normal tire condition by simply inflating the tire through the valve 20B.

Conversely, when driving on a snowy or icy road due to changes in driving conditions, the user simply closes the valve 20.
When the air in the air chamber 10C is removed by operating B, the air chamber 10G contracts due to the relative pressure difference with the tire air pressure, and the spikes 90 protrude from the outer surface of the trellis lOn, making it possible to obtain the condition of a spiked tire. It can be done.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, a normal tire condition and a spiked tire condition can be obtained simply by the same operation as adjusting the air pressure of a normal tire, and a highly useful spiked tire can be obtained. It will be done.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a spiked tire according to an embodiment of the present invention; Fig. 2 is an enlarged sectional view of a part of an embodiment of the present invention; Fig. 3 is a normal tire according to an embodiment of the present invention. 4 is a sectional view showing a conventional spiked tire. 10...Tire, +00-2...Inner layer of tread portion, 10c...Air chamber, 20B...Valve, 30...Spike. 10B-1...Outer layer of the tread part, 0B-2 A part of the pod glossy row is thickly placed on the side. Top view (Yujyang Taii Eulfang-eup,) 3rd map showing the scarlet spiked tires Figure 4

Claims (1)

[Claims] The tread portion is made double layered into an inner and outer layer to form an air chamber between them, and the heads of a plurality of spikes are buried in the inner layer, and the pressure of the air chambers is adjusted to allow the spikes to be attached to the tread portion. A spike tire characterized by being able to appear freely from the outer layer.