JPS6274007U

JPS6274007U -

Info

Publication number: JPS6274007U
Application number: JP16689485U
Authority: JP
Priority date: 1985-10-30
Filing date: 1985-10-30
Publication date: 1987-05-12
Anticipated expiration: 2000-10-30
Also published as: JPH0519203Y2

Description

[Brief explanation of drawings]

第１図はこの考案の一実施例を示す空気入りタ
イヤのトレツド展開図、第２図は空気入りタイヤ
の子午線断面図、第３図は開発途中の空気入りタ
イヤのトレツド展開図、第４図も開発途中の空気
入りタイヤのトレツド展開図、第５図は第１図の
―矢視断面図、第６図は断面形状が非対称な
横溝を有する空気入りタイヤのトレツド展開図、
第７図は第６図の―矢視断面図、第８図は比
較タイヤＡの試験結果を示すグラフ、第９図は比
較タイヤＢの試験結果を示すグラフ、第１０図は
考案タイヤの試験結果を示すグラフ、第１１図は
比較タイヤＡのトレツド展開図、第１２図は比較
タイヤＢのトレツド展開図、第１３図は考案タイ
ヤのトレツド展開図、第１４図は第１３図の―
矢視断面図、第１５図は従来タイヤの使用初期
における高接地圧領域を示すトレツド展開図、第
１６図は摩耗進行時における高接地圧領域を示す
トレツド展開図である。１１，１２……空気入りタイヤ、１３，１４…
…横溝、１７，１８……トレツド端、２１，２２
……主領域、２３，２４，２５，２６……開口端
エツジ、２７，２８……幅方向中央線、３０……
法線、ｍ……横溝の長さ、ＴＷ……トレツド幅、
Ｐ……横溝のピツチ、Ｒ……トレツド半径、Ｅ…
…赤道面。 Fig. 1 is a developed view of the tread of a pneumatic tire showing one embodiment of this invention, Fig. 2 is a meridian cross-sectional view of the pneumatic tire, Fig. 3 is a developed view of the tread of a pneumatic tire under development, and Fig. 4 5 is a tread development view of a pneumatic tire that is currently under development, FIG. 5 is a sectional view taken along the - arrow in FIG. 1, and FIG.
Figure 7 is a sectional view taken along the - arrow in Figure 6, Figure 8 is a graph showing the test results of comparative tire A, Figure 9 is a graph showing the test results of comparative tire B, and Figure 10 is a test of the invented tire. Graphs showing the results, Fig. 11 is a developed tread diagram of comparative tire A, Fig. 12 is a developed tread diagram of comparative tire B, Fig. 13 is a developed tread diagram of the invented tire, and Fig. 14 is a developed tread diagram of Fig. 13.
15 is a tread development diagram showing a high ground contact pressure region of a conventional tire at the initial stage of use, and FIG. 16 is a tread development diagram showing a high ground contact pressure region when wear progresses. 11,12...pneumatic tires, 13,14...
...Horizontal groove, 17, 18...Tread end, 21, 22
... Main area, 23, 24, 25, 26 ... Opening edge, 27, 28 ... Width direction center line, 30 ...
Normal line, m...Length of lateral groove, TW...Tread width,
P...Pitch of horizontal groove, R...Tread radius, E...
...Equatorial plane.

Claims

[Scope of utility model registration request]

It is a pneumatic tire that is mounted on a double wheel, and the number of grooves is in the range of 45 to 50 per lap, and the length of the lateral groove is 1/5 of the tread width when filled with the appropriate internal pressure. The above, and
The value obtained by dividing the groove width of the lateral groove at the tread end by the pitch of the lateral groove is in the range of 0.3 to 0.45, and the tread radius in the meridian cross section at the initial stage of use is in the range of 280 mm to 350 mm, and further,
The center line in the width direction of the lateral groove in the main region between the tread end and a position away from the tread end by a distance of 1/5 of the tread width toward the equatorial plane intersects at 90 degrees with respect to the equatorial plane, and The cross-sectional shape of the lateral groove in the main region taken along a plane parallel to the equatorial plane is symmetrical to the normal line passing through the widthwise center of the lateral groove, and the cross-sectional shape of the lateral groove at the outer end of the main region located at the tread end is The value obtained by dividing the width by the width of the lateral groove at the inner end of the main region is in the range of 1.0 to 1.2, and further, the edges of both opening ends of the lateral groove in the main region extend in a straight line. pneumatic tires.