JPS6218307A - Spike tire - Google Patents

Abstract

PURPOSE:To prevent slip and the breakage of road surface by allowing spikes to appear and disappear onto the tire surface by varying the rigidity of the supporting part of the spike by utilizing the change of state of liquid. CONSTITUTION:A spike tire 1 is manufactured by installing spikes 3 onto a snow tire 2. The spike 3 has cylindrical shank 4, and a tip 6 is installed at the top edge part of the shank 4 so as to close the opened port edge of a hollow part 5. The shank 4 is installed onto a flange 12 through a supporting part 11 in the installation hole 8 of the tire 2. The supporting part 11 is formed into the cylindrical form having a flexible wall 13, and a sealed inner space 14 is formed together with the shank 4 and the flange 12, and the inner space 14 is filled with liquid 15. A cavity 16 is formed between the wall 13 of the supporting part 11 and the installation hole 8, and said cavity 16 develops as the space for receiving the deformation of the supporting part 11.

Description

[Detailed Description of the Invention] (a) Purpose of the Invention [Field of Industrial Application] This invention relates to a spiked tire used when a vehicle runs on an icy and snowy road, etc., and in particular to a structure in which the spikes are attached to the tire. It is related to.

[Prior art] When a vehicle runs on an icy and snowy road, a plurality of spikes are installed on the tire tread to prevent the tire from slipping.
It is conventionally known to use spiked tires with protruding parts.

A conventional spiked tire has a structure in which spikes 102 are driven into a snow tire 101 and protrude about 1.5 to 2.0 feet from the tire surface, as shown in FIG. A tip 103 made of cemented carbide or the like is usually attached to the tip of the shank 104 of the spike 102 for wear resistance.

Conventional spiked tires have this structure, so
On a road surface without ice or snow, the spikes 102 scrape the road surface and scatter it into the atmosphere as dust, causing a pollution problem. As a countermeasure, current measures include reducing the protrusion of the spikes to 1.0 to 1.5m+, or increasing the number of spikes from 154 per tire to 1.
Efforts have been made to reduce the number of tires to 22 per tire, but this does not essentially solve the pollution problem, and on the other hand, it may cause a decline in tire performance on icy and snowy roads. This is considered to be a safety problem, and for these reasons, it is desired to develop spiked tires that do not scrape the road surface and can maintain the tire's performance on icy and snowy surfaces.

[Problems to be Solved by the Invention] The present invention has been made in view of the above-mentioned circumstances. It is possible to change the length of the protrusion from the tire surface or move it below the tire surface, thereby not scraping the road surface and reducing the tire performance on ice and snow. And, as an important point, the object is to provide a spiked tire with a particularly simple structure.

(B) Structure of the Invention [Means for Solving the Problem] In response to this object, the spiked tire of the present invention has the base end of a spike with a tip attached to the tip of the shank movably attached to the tire. A spike tire comprising: a support portion having a flexible wall and a fluid-tight chamber containing a liquid therein; It is characterized in that a gap is provided between the support portion and the tire to allow the deformation of the chamber.

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

゛ In Fig. 1, 1 is a spiked tire.

A spiked tire 1 has spikes 3 attached to a snow tire 2. The spike 3 has a cylindrical shank 4, and a tip 6 is attached to the tip of the shank 4 by caulking so as to close the open end of a hollow portion 5 formed in the axial direction. The shank 4 is made of steel, for example. The proximal open end of the hollow portion 5 is closed by a stopper 7. Most of the proximal end of the shank 4 is embedded in the snow tire 2, and its outer circumferential surface is in contact with the inner surface of the mounting hole 8, so the friction force causes the shank 4 to stick to the snow tire 2.
The mounting is held within the hole 8. However, if a load in the wheel direction (for example, a load from the road surface or an elastic restoring force from a support section described later) is applied to the shank 4, the shank 4 will be mounted within the hole 8 relative to the snow tire 2. Displaceable. The shank 4 is installed in the hole 8,
It is attached to and supported by the flange 12 via the support part 11. The flange 12 is made of steel, for example, and is fixed to the snow tire 2.

The support part 11 is made of rubber, for example, and has a cylindrical shape with a flexible wall 13, one end of which is glued to the shank 4, and the other end of which is attached to the shank 4.
It is glued to the flange 12 and together with the shank 4 and 7 flange 12 forms a sealed internal space 14 . Inside the internal space 14 is a liquid content 15 such as water or an aqueous solution.
is filled. A gap 16 is provided between the outer peripheral surface of the wall 13 of the support portion 11 and the inner surface of the hole 8 for mounting the snow tire 2. This gap 16 functions as a space for accepting deformation of the support portion 11, which will be described later.

[Function] The action of the spiked tire 1 constructed as described above is as follows.

First, a temperature at which the spikes of the spiked tire 1 function is set, and the internal space 14 is filled with a liquid content 15 having a freezing point at a temperature correlated with the set temperature. For example, 0
If you want to set Spike 3 to function around ℃,
Pure water is used as the liquid content 15. Further, the set temperature can be adjusted by changing the concentration of solute in the liquid content 15. When the environment such as the road surface on which the spiked tire 1 runs is 0° C. or higher and there is no ice or snow, the spikes 3 of the spiked tire 1 come into contact with the road surface and receive an axial load from the road surface. This axial load deforms the support portion 11 until it fills the gap 16, and the spike 3 is buried in the snow tire 1 until it almost coincides with the tread surface 17.

When the contact with the road surface is released, the spikes 3 protrude from the tread surface 17 of the snow tire 2 due to the elastic restoring force of the support portion 11. In other words, in a temperature environment where there is no ice or snow on the road surface,
The running of the spiked tire 1 is carried out mostly by the tread surface 17.

On the other hand, in an environment with a temperature of 0° C. or higher where ice and snow are present on the road surface, the liquid content 15 in the internal space 14 of the support section 11 solidifies and the rigidity of the support section 11 increases, so that the spikes 3 are removed from the road surface in the axial direction. Even when subjected to a load, the spikes 3 do not sink into the snow tire 2 and maintain a state of protruding outward from the tread 17, so they bite into the ice and snow on the road surface and perform the anti-slip function as spikes. do.

[Other Embodiments] The embodiment shown in FIG.
2 are integrally made of a fillable material such as rubber, and furthermore, a cylindrical extension part 18 is integrally provided on the extension part 1.
In this case, when the spike 3 is mounted on the snow tire 1, wear of the shank 4 due to interposition of foreign matter can be reduced.

The spike 3C of the embodiment shown in FIG. 3 is the same as the spike shown in FIG. 2, with the proximal end of the hollow portion being blind 13J1, and an internal space 14 for accommodating the liquid content 15 is formed independently. ing.

In addition, in each embodiment, the liquid content 15 stored in the internal space 14 is a liquid as it is, or
Any microencapsulated material can be used.

(C) Effects of the Invention As is clear from the above explanation, according to the present invention, the rigidity of the support part of the spike of a spiked tire is changed by using the change in the state of the liquid, and the protrusion length of the spike from the tire surface is changed. It is possible to change the height of the tire or move it below the surface of the tire, so that it does not scrape the road surface or reduce the performance of the tire on ice and snow, and, importantly, In particular, it is possible to obtain a spiked tire with a simple structure.

[Brief explanation of drawings]

FIG. 1 is an explanatory longitudinal cross-sectional view of a spiked tire according to one embodiment of the present invention, FIG. 2 is an explanatory longitudinal cross-sectional view showing a spiked tire according to another embodiment of the invention, and FIG. 3 is an explanatory longitudinal cross-sectional view of a spiked tire according to another embodiment of the invention. FIG. 4 is an explanatory longitudinal cross-sectional view showing a spiked tire according to another embodiment, and FIG. 4 is an explanatory longitudinal cross-sectional view showing a conventional spiked tire. 1...Spike tires 2...Snow tires 3.
31), 3G...Spike 4...Shank 5.
...Hollow part 6...Tip 7...Bung body 8
...Mounting hole 11...Support part 12...7
Lunge 13... Wall 14... Internal space 15.
...Liquid content 16...Void 17...Tread 18...Extension part Fig. 1 Fig. 2

Claims (1)

[Claims] A spiked tire comprising a proximal end of a spike with a tip attached to the tip of the shank movably attached to the tire, the support having a flexible wall and a fluid-tight chamber containing a liquid. A spike tire characterized in that a part is provided between the base end of the shank and the tire, and a gap is provided between the support part and the tire to allow deformation of the chamber.