JPS60252008A - Spike tire - Google Patents

Abstract

PURPOSE:To prevent slip and the breakage of road by allowing the spikes planted onto the tread of a tire to freely advance and retreat for the grounded surface by increasing and decreasing the pneumatic pressure filling the tire. CONSTITUTION:A tread T is arranged at the center part on the outer periphery of a tire 1, and is constituted of main tread 2 always in contact with a road surface and a side tread 3 arranged on the both sides of the main tread 2. The side treads 3 are arranged on the outer side part of the both shoulders 4 of the main tread 2, and in case of a standard pneumatic pressure, the side tread is a little inclined to a sidewall 5 side. The tread pattern of the side tread 3 is constituted of the block type having high slip preventing effect, and spikes 6 are planted into the tread groove between blocks 7. The side tread 3 having spikes 6 planted is advanced and retreated by increasing and decreasing the pneumatic pressure filling the tire, and the prevention of slip and the prevention of the breakage of road can be achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a spike tire used to prevent skidding of automobiles traveling on frozen roads in winter.

[Prior Art] Spiked tires currently in use are usually snow tires with spikes driven into the tread. Such spiked tires use spikes to ensure driving force and braking force on ice and frozen snow.

However, when driving on non-frozen roads, spikes come into direct pressure contact with the road surface, which poses the problem of damaging the road.

In order to solve this problem, spiked tires in which the tips of the spikes are lower than the surface of the L/Red have also been developed and used. In this type of tire, the spikes protrude as the tread wears. The idea is to ensure that spiked tires can be installed early without causing damage to roads, and that the spikes can function effectively when needed.

[Problem that the invention attempts to solve] Spiked tires can cause damage to roads.

Needless to say, this is a serious social problem.

Even with the latter of the above spiked tires, the spikes do not protrude above the tread surface when initially installed, so they do not damage the road, and are not a fundamental solution. I haven't gotten it. If the tread wears out and the spikes protrude, the only way to drive on icy roads without damaging the road is to replace the tires. There is a particular problem.

An object of the present invention is to provide a spiked tire that does not damage roads due to spikes.

[Means for Solving the Problems] The gist of the configuration of the present invention is that spikes installed in the tread of a tire can be moved forward and backward from the ground by increasing and decreasing the air pressure filled in the tire. It is a spiked tire made up of

Various concrete methods can be considered for making the spikes move back and forth by increasing and decreasing the air pressure of the tire.

This is illustrated next.

For example, spikes are planted in the tread with their tips set back from the tread surface, and holes are formed in the belt interposed between the carcass and the tread to correspond to the positions where the spikes are installed. The spikes are configured so that when the air pressure is increased, the spikes slightly protrude from the tread surface, and when the air pressure is decreased, they recede. The spikes are placed in a position where they can easily expand and contract under the influence of air pressure.

Alternatively, the tread is composed of a main tread located at the center of the tire's outer circumference, which is always in contact with the ground, and side treads located on both sides of the main tread, and spikes are planted in the side treads to reduce the tire air pressure 1. The side treads are also configured so that they extend relatively to each other to form a ground contact surface.

In addition, spikes placed on the tread may be configured to move up and down as the air pressure of the tire increases or decreases.

[Function] Since the present invention has such a structure, when the air pressure of the tire is maintained at a predetermined level (standard air pressure), the spikes are retracted from the ground contact surface of the tread.

On the other hand, if the air pressure is increased or decreased, the spikes will advance to the ground surface, so if the air pressure is increased or decreased accordingly, the spikes will advance.

When driving on non-icy roads, keep the tires at standard air pressure and retract the spikes; if you need to drive on icy roads, increase or decrease the tire air pressure to the specified value. This is what allows the spikes to advance.

If the air pressure drops to a predetermined value, you can use a gauge.
This allows you to easily measure while making measurements, and increasing the air pressure requires only a slight addition, so you can easily do it anywhere as long as you have a small air tank available.

[Example] An embodiment of the present invention will be described below based on the drawings.

As shown in FIGS. 1 and 2, the tread T is comprised of a main tread 2 located at the center of the outer periphery of the tire 1 and in constant contact with the road surface, and side treads 3 disposed on both sides of the main tread 2. It consists of 3.

The side tread 3.3 is arranged on the outside of both shoulders 4.4 of the main tread 2, and as shown in Fig. 1, it seems to be slightly inclined toward the sidewall 5.5 when the air pressure is standard. Configure. That is, at this time, the tread surface of the side tread 3.3 is set back slightly from the tread surface of the main tread 2, as shown in FIG.

The side tread 3.3 has a block type tread pattern that provides excellent driving and braking power even on snowy roads.
For example, as shown in FIG. 4, spikes 6.6 are driven into the tread grooves between the blocks 7.7.

If the shape of the tip of the spike 6 is made into a large-diameter cylindrical shape, for example, as shown in FIG. 3, it is possible to improve the driving force on snowy roads as well as the driving force on frozen roads. The shape of the tip may be a rectangular tube shape as shown in FIG. 3 or a cylindrical shape. In any case, it is better to have as large a diameter as possible, but the cylindrical shape suppresses the increase in weight caused by increasing the diameter of the tip of the spike.

Further, as shown in FIG. 4, a similar effect can be obtained by configuring the pattern blocks 7 formed on the tread surface to be surrounded by closed ring-shaped plate spikes 8 having the same external shape. Dew. It goes without saying that the tips of the plate-like spikes 8 should protrude slightly from the tread surface. Although the plate-like spikes 8 are not spikes in the ordinary sense, herein, spikes are used to refer to protrusions attached to the tread of a tire to improve braking and driving force on icy roads.

It should be noted that there is no problem in driving ordinary spikes with a side tread of 3.34 mm.

Furthermore, a main belt 10, a side belt 11, and a workpiece 1 are arranged between the main tread 2 and side treads 3.3 and the carcass 9, respectively, and the main belt 10 and side belts 11.11 are mutually arranged. shall be flexibly joined at the edge touching the. For example, the connection may be made using a mesh. This is the site de l/
The purpose is to facilitate the up-and-down movement of the RAD 3.3 as the tire air pressure fluctuates.

In this embodiment, the structure is as described above, so if the air pressure is maintained at the standard level, the side tread 3.3 will be
As shown in Fig. 1, the main tread 2 is in a backward state, and when the air pressure is slightly lowered, the main tread 2 appears as shown in Fig. 2. Then, the side tread 3.3 moves back slightly and the side tread 3.3 stands up.

Therefore, in the former case, only main tread 2 is in contact with the ground,
In the latter case both treads 2.3.3 will be in contact with the ground.

Therefore, when driving on a non-frozen road surface, if the air pressure is maintained at a standard level, the spikes 6, 6, etc. will not touch the ground, so there is no risk of damaging the road. Moreover, when driving on rough roads such as muddy roads, the side tread 3
．． It seems that the spikes 6.6... in No. 3 may be useful for preventing slipping.

In addition, even when driving on a non-frozen road with standard air pressure, if the brakes are applied suddenly, the tire 1 will be compressed at the contact point, and the side tread 3.3 will be relatively advanced and touch the ground, causing the brake to stop. It also has the effect of increasing effectiveness.

On the other hand, when driving on a frozen road surface, if the air pressure is slightly lowered, the main tread 2 will move back a little and the side treads 3.3 will stand up, so both treads 2.3.
The tread surfaces of No. 3 are almost at the same height, and both tread surfaces come into contact with the road surface. Therefore, spikes 6.6 of side tread 3.3 will function,
Driving force and braking force on frozen roads can be ensured.

Also, as mentioned above, if you have a gauge available, you can accurately lower the air pressure.

Since only a small increase in air pressure is required,
You can easily do this by preparing a small air tank.

[Effects of the Invention] As can be understood from the following explanation, the spiked tire of the present invention ensures safe driving of vehicles on frozen roads and eliminates the problem of road damage caused by spikes when driving on non-frozen roads. The intended purpose can be achieved. Furthermore, it has the advantage of being sufficiently simple to use.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a partial schematic sectional view of the tire of the embodiment at standard air pressure, and FIG. 2 is a partial schematic sectional view of the tire when the air pressure is slightly lowered. , Fig. 3 is a schematic perspective view showing one example of spikes, Fig. 4 is a partial schematic front view of a side tread with spikes driven in, and Fig. 5 is a partial schematic front view of a side tread with other spikes attached. be. l...Tire, 2...Main tread, 3...Side tread, 4...Shoulder, 5...Side wall, 6...Spike, 7...Block, 8...
Plate spikes, 9... Carcass, 10... Main belt, 11... Showa 1 Figure 5

Claims (1)

[Scope of Claims] 1. A spiked tire characterized in that spikes planted in the tread of the tire are configured to move forward and backward with respect to the ground contact surface by increasing and decreasing the air pressure filled in the tire. 2. The above trend is made up of a main tread located at the center of the tire's outer circumference that always serves as the contact surface, and side treads located on both sides of the main tread that become the contact surface when the air pressure is lowered, and spikes on this side tread. The spike tire according to claim 1, characterized in that the spike tire is implanted with. 3. The spiked tire according to claim 1, wherein the tip of the spike embedded in the tread is formed into a large-diameter cylindrical shape. 4. Professionally adjust the tread pattern of the side treads in Section 2.
3. The spiked tire according to claim 2, wherein the spike is formed in the shape of a hollow plate, and the spike is formed in the shape of a closed ring plate surrounding the blocks of the side tread.