JPH0226904U

JPH0226904U -

Info

Publication number: JPH0226904U
Application number: JP10565188U
Authority: JP
Priority date: 1988-08-09
Filing date: 1988-08-09
Publication date: 1990-02-21

Description

[Brief explanation of drawings]

第１〜３図は本考案に係る空気入りラジアルタ
イヤの一実施例を示す図であり、第１図はその一
部展開図、第２図は第１図の―矢視断面図、
第３図は第１図の―矢視断面図である。第４
〜８図は本考案に係る空気入りラジアルタイヤの
他の実施例を示す図であり、第４図はそのサイプ
の断面図、第５，６図はそれぞれのシヨルダー形
状を示す図、第７，８図はそれぞれの補助溝の配
置を示す図である。第９〜１１図はそれぞれ轍上
のタイヤに加わる力を説明する図である。１１……空気入りラジアルタイヤ、１２……ト
レツド、１３，１３Ａ……横溝、１６……陸部、
１６Ａ……シヨルダー陸部、１６ＡＡ……陸部部
分、２０……補助溝、２２……サイプ。 1 to 3 are diagrams showing one embodiment of a pneumatic radial tire according to the present invention, in which FIG. 1 is a partially exploded view thereof, FIG. 2 is a sectional view taken along the arrow - in FIG.
FIG. 3 is a sectional view taken along the - arrow in FIG. 1. Fourth
8 are views showing other embodiments of the pneumatic radial tire according to the present invention, FIG. 4 is a sectional view of the sipe, FIGS. 5 and 6 are views showing the respective shoulder shapes, and FIGS. FIG. 8 is a diagram showing the arrangement of each auxiliary groove. 9 to 11 are diagrams each explaining the force applied to a tire on a rut. 11...Pneumatic radial tire, 12...Tread, 13,13A...Horizontal groove, 16...Land part,
16A...Shoulder land part, 16AA...Land part, 20...Auxiliary groove, 22...Sipe.

Claims

[Scope of utility model registration request]

A pneumatic radial tire having a plurality of lateral grooves extending laterally from the shoulder of the tread toward the center of the tread, spaced apart from each other in the circumferential direction, and having lug-shaped and/or block-shaped land portions defined by the lateral grooves. , an auxiliary groove extending in the circumferential direction is arranged in the shoulder land portion of at least one shoulder side of the tread, and a plurality of sipes extending laterally are provided in the land portion of the auxiliary groove located on the shoulder side, The auxiliary groove is narrower than the groove width of an adjacent lateral groove and has a groove width such that both side walls of the groove do not come into contact with each other during rolling, and the auxiliary groove cuts outward in the lateral direction of the tire and is normal to the tread surface. A pneumatic radial tire characterized in that the auxiliary groove has an inclination angle of 10° to 60° with respect to the tread end, and the auxiliary groove is arranged at a distance from the tread end to within 80% of the lateral width of the shoulder land portion.