KR20040016142A - Inner Direction Carcass Folded Radial Tire - Google Patents

Abstract

PURPOSE: A radial tire is provided to reduce the weight of the tire and to improve the extension and the contraction by firmly fixing the end of a carcass. CONSTITUTION: A carcass(2) shields a bead core(5) and an apex(6) from the outside of a tire inward. An end(2e) of the carcass is located between the carcass and the apex. By differing the combining structure of the carcass and the apex, the end of the carcass is fixed in the apex firmly. Therefore, the extension and the contraction are improved and the weight of the tire is reduced. Moreover, the riding comfort is improved.

Description

Inner Direction Carcass Folded Radial Tire}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radial tire. More particularly, the present invention relates to a radial tire having a rigidly fixed end of the carcass by varying the carcass structure, thereby reducing the weight of the tire and improving the stretching action.

Generally, a radial tire includes a tread 11 in contact with a road surface, a carcass 12 positioned under the tread to form a skeleton of the tire, and the tread. It comprises a belt 13 located between the 11 and the carcass 12 and a liner 14 formed on the inner wall of the carcass. The carcass 13 surrounds a bead core 15 and an apex 16, the ends of which are in contact with the ends of the belt 13. In general, the carcass 12 is subjected to the greatest stress due to the action of flexion, rotational resistance, etc. at this end and peeling phenomenon may occur. Therefore, in a typical tire, the carcass 12 supports a load, resists shock, and fatigue resistance to flexing movement during driving is required. Therefore, how to form a carcass structure in a tire design is very important. It is one of the problems.

As a representative example, Korean Patent Laid-Open Publication No. 93-2145, in designing a tire, changed the turn-up structure of a carcass fly. That is, as shown in FIG. 2, the tire 20 is turned up around the bead core 25 with the carcass ply 22 and then turned up, and then the carcass ply 22 wrapped around the bead core 25 is turned on. The apex 26 was attached to the outer surface, and the inner liner 24 etc. were attached to the periphery again. However, these conventional tires can be reduced in riding effect due to waste of material and increased thickness of the side wall 27 due to the carcass folding up to the belt, thereby reducing the riding comfort.

The present invention has been proposed in order to solve the above-mentioned disadvantages, and its purpose is to change the coupling structure between the carcass and the afax to strongly fix the end of the carcass, thereby reducing the weight of the tire and improving the radial tire. In providing.

1 is a cross-sectional view of a conventional radial tire.

2 is a partial sectional view of a conventional radial tire with improved carcass structure.

3 is a cross-sectional view of a carcass folding radial tire according to the present invention.

Explanation of symbols on the main parts of the drawings

1 ..... Tread 2 ..... Carcass

3 ..... Belt 5 ..... Bead Core

6 ..... Apex

The present invention for achieving the above object, a tread in contact with the road surface, the carcass is located under the tread to form a skeleton of the tire, the belt located between the tread and the carcass, and a liner formed on the inner wall of the carcass In the radial tire configured to include, the carcass wraps around the bead core and afax from the outside of the tire inward, the carcass folding, characterized in that the end of the carcass is located between the carcass and Apex It is about a radial tire.

Hereinafter, the radial tire according to the present invention will be described in detail with reference to the drawings.

Figure 3 shows a cross-sectional structure of the radial tire of the present invention. Radial tire 10 'according to the present invention, as shown in Figure 3, basically a tread (1) in contact with the road surface, carcass (2) located in the lower part of the tread to form a skeleton of the tire, A belt 3 located between the tread and the carcass and an inner liner 4 formed on the inner wall of the carcass.

In the case of a conventional tire, carcass is a skeleton of the tire, which can hold the entire tire strongly, but can increase the material cost and weight and slow down the stretching effect, thereby reducing the riding comfort. Accordingly, the radial tire according to the present invention improves not only the weight reduction of the tire but also the stretching action while maintaining the role of the carcass by changing the structure in which the carcass 2 surrounds the afax 6.

Specifically, in the radial tire 10 'according to the present invention, the carcass 2 has a structure bent inward from the outside of the tire. The carcass 2 wraps and turns the bead core 5 and the afax 6 from the outside of the tire inward, and an end 2e of the carcass is disposed between the carcass 2 and the afax 6. Inserted and glued.

In this way, not only the tip 2e of the carcass can be firmly fixed to the apex 6 but also the thickness of the sidewall 7 of the tire can be reduced.

As described above, the radial tire according to the present invention, by varying the coupling structure between the carcass and Apex, the end of the carcass is strongly fixed to the Apex to improve the flexing action, while reducing the weight of the tire and improve the riding comfort Can be.

Claims (1)

A tread 1 in contact with the road surface, a carcass 2 positioned below the tread to form a skeleton of the tire, a belt 3 positioned between the tread and the carcass, and an inner wall of the carcass. In the radial tire comprising the liner 4, The carcass 2 wraps around the bead core 5 and the afax 6 from the outside of the tire inward, so that the end 2e of the carcass is between the carcass 2 and the afax 6. Carcass folding radial tire characterized in that it is located.