JPH066006U - Tires for running on unpaved roads - Google Patents

Abstract

(57) [Summary] [Structure] A plurality of annular convex ridges 3 are formed in the radial direction on the tire sidewall 2 that is on the outside when the vehicle is mounted. One or more core materials 4 are embedded inside the one or more annular ridge portions 3. [Effect] In addition to protecting the tire sidewall 2 from large stones, roots of trees, etc., even if a sharp obstacle such as a rock corner hits the annular ridge 3 and a cut is made in the annular ridge 3, damage caused by being cut by the core material 4 Can be prevented as much as possible, and cutting of the annular ridge portion 3 can be reduced to improve durability.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tire for traveling on an unpaved road suitable for traveling on an unpaved road such as a mountainous area.

[0002]

[Prior art]

 For example, when a car is run in a mountainous area, obstacles such as rocks and roots of the tree may hit the tire side wall portion and damage the surface of the tire sidewall portion. In order to prevent this, conventionally, as disclosed in Japanese Patent Application Laid-Open No. 3-82611, a plurality of annular convex ridges in the radial direction are formed in the tire sidewall portion, and the tire sidewall portion is formed. The main body is designed to prevent it from directly hitting rocks and the like, and a fiber layer is provided inside the main body of the tire sidewall to reinforce it.

[0003]

[Problems to be solved by the device]

 In the above-mentioned prior art, the effect is sufficient to protect the tire sidewall portion from large stones, tree roots, etc., but if sharp obstacles such as rock corners hit, the annular convex portion will be torn. It can be difficult to prevent damage.

The present invention provides a tire for running on unpaved roads, which is capable of solving the above-mentioned problems of the prior art by embedding one or more core materials inside one or more annular ridges. The purpose is to provide.

[0005]

[Means for Solving the Problems]

 The concrete means for solving the problem in the present invention is a tire for traveling on a non-paved road, in which a plurality of annular convex ridges 3 are formed in a radial direction on a tire sidewall 2 which is an outer side when mounted on a vehicle. That is, one or more core materials 4 are embedded in the annular ridges 3 or more.

[0006]

[Action]

 A tire 1 has a plurality of radial ridges 3 formed in a radial direction on a tire sidewall 2 which is an outer side when mounted on a vehicle. One or more of the annular ridges 3 are provided inside and one or more of them are provided inside. The core material 4 is buried and reinforced. Even if a sharp obstacle such as a rock corner hits the tire sidewall portion 2 and the surface of the annular ridge portion 3 is torn, the core material 4 hits, and further cuts are made to reach the base portion of the annular ridge portion 3. It is hard to break and less likely to be cut.

[0007]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. In the first embodiment shown in FIG. 1, reference numeral 1 is a pneumatic tire for running on unpaved roads, in which shoulder portions 6 are formed on the left and right sides of the tread portion 5, and a side wall portion 2 is formed radially inward from each shoulder portion 6. And a bead portion 7 is formed, and a bead core 8 is embedded in the bead portion 7.

Reference numeral 9 denotes a carcass, which extends from the tread portion 5 through the left and right shoulder portions 6 and the sidewall portion 2 to the bead portion 7, is folded back by the bead core 8 and extends to the tread portion 5 or the shoulder portion 6. . The left and right side wall portions 2 each have a ridge portion 3 protruding outward from the main body portion 2A. The ridge portion 3 is annular and is formed in a plurality (six in the embodiment) in the radial direction. ing. An annular groove portion 10 is provided between the respective ridge portions 3.

The ring-shaped protrusion 3 and the groove 10 have a quadrangular or trapezoidal cross section, but the surface of the sidewall 2 may be formed in a corrugated cross section to have a semicircular cross section. . The core material 4 is embedded in one or more (four in the embodiment) of the plurality of annular protruding portions 3. The core material 4 is an annular wire made of steel, reinforced plastic, fiber or the like, and a single wire or a stranded wire is used, and one or a plurality of wires are embedded in each ridge 3.

When the tire 1 is mounted on a vehicle, the sidewall portion 2 facing the outside thereof mainly comes into contact with an obstacle, so that the annular ridge portion 3 and the core material 4 are formed only on the outside sidewall portion 2. It may be buried. Even if the ridge portion 3 is formed on the sidewall portion 2 of the tire 1 and the core material 4 is embedded, the handling characteristics such as riding comfort, steering performance and stability performance are not impaired.

FIG. 2 shows a second embodiment, in which the tire 1 has a wider radial width of the annular ridge portion 3 than the tire according to the first embodiment to reduce the number thereof. Each of the annular ridges 3 has a rectangular cross section, and two or more core members 4 are embedded in each of the annular ridges 3 in a radially separated manner. In the second embodiment, it is easier to increase the number of the core members 4 than in the first embodiment, the damage resistance and durability of the side wall portion are improved, and the rigidity is also increased.

[0012]

[Effect of device]

 According to the present invention described in detail above, in a tire for traveling on a non-paved road in which a plurality of annular convex ridges 3 are formed in a radial direction on a tire sidewall portion 2 which is an outer side when mounted on a vehicle, the one or more annular ridges are provided. Since one or more core materials 4 are embedded inside the ridges 3, the tire sidewall 2 can be protected from large stones, roots of trees, etc., and sharp ridges and other sharp obstacles hit the annular ridges. Even if a cut is made in the portion 3, it is possible to prevent damage such as tearing by the core material 4, and it is possible to reduce the cutting of the annular ridge portion 3 and improve the durability.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a sectional view showing a first embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 tire 2 sidewall part 2A main body part 3 annular ridge part 4 core material 5 tread part 6 shoulder part 7 bead part 8 bead core 9 carcass 10 groove part

Claims (1)

[Scope of utility model registration request] 1. A tire for traveling on unpaved roads, comprising a plurality of annular convex ridges (3) in a radial direction on a tire sidewall (2) which is outside when mounted on a vehicle. A tire for running on unpaved roads, characterized in that one or more core materials (4) are embedded inside the ridge (3).