JPH0169002U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、本考案による空気入りアジアルタイ
ヤの負荷接地面を示す概略平面展開図、第２図は
第１図の―線上断面の拡大展開図、第３図は
第１図の―線上断面の拡大展開図、第４図は
第１図の―線上の断面図、第５図は第１図の
―Ｖ線上の断面図である。 Ａ……中心領域、Ｂ……外側領域、１……中心
領域主溝、２……外側主溝。 Fig. 1 is a schematic plan development view showing the load contact surface of the pneumatic Asian tire according to the present invention, Fig. 2 is an enlarged development view of a cross section taken along the line - in Fig. 1, and Fig. 3 is an enlarged view taken along the - line in Fig. 1. FIG. 4 is a sectional view taken along line -V in FIG. 1, and FIG. 5 is a sectional view taken along line -V in FIG. A...Central region, B...Outer region, 1...Central region main groove, 2...Outer main groove.

Claims (1)

【実用新案登録請求の範囲】 トレツド踏面内に周方向へ伸びる複数本の周方
向主溝が配置され、タイヤクラウン内に有機繊維
のベルトを有し、ベルトコードがタイヤ周方向に
対して比較的小さな角度で傾斜して互いに交差し
て配置された少なくとも２層のベルト層を有する
空気入りラジアルタイヤにおいて、 前記周方向主溝のうち、タイヤ負荷時の接地幅
ＴＷの５０％以内のトレツド中心領域Ａ内に位置
するセンター主溝は全周にわたり実質的に同一溝
深さを有し、トレツド中心領域Ａのタイヤ軸方向
両側における両外側領域Ｂ内に位置する主溝の溝
深さおよび／または溝底角部Ｒが周方向に連続的
または断続的に変化されていることを特徴とする
空気入りラジアルタイヤ。[Claim for Utility Model Registration] A plurality of circumferential main grooves extending in the circumferential direction are arranged in the tread tread surface, an organic fiber belt is provided in the tire crown, and the belt cord is relatively narrow in the tire circumferential direction. In a pneumatic radial tire having at least two belt layers inclined at a small angle and arranged to cross each other, a tread center region of the circumferential main groove within 50% of the ground contact width TW when the tire is loaded. The center main groove located within A has substantially the same groove depth over the entire circumference, and the groove depth of the main groove located within both outer regions B on both sides of the tread center region A in the tire axial direction and/or A pneumatic radial tire characterized in that a groove bottom corner R is changed continuously or intermittently in the circumferential direction.