JPH1080923A - Pneumatic tire and vulcanizing mold for pneumatic tire - Google Patents

Pneumatic tire and vulcanizing mold for pneumatic tire

Info

Publication number
JPH1080923A
JPH1080923A JP8260311A JP26031196A JPH1080923A JP H1080923 A JPH1080923 A JP H1080923A JP 8260311 A JP8260311 A JP 8260311A JP 26031196 A JP26031196 A JP 26031196A JP H1080923 A JPH1080923 A JP H1080923A
Authority
JP
Japan
Prior art keywords
groove
sipe
pneumatic tire
main
grooves
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP8260311A
Other languages
Japanese (ja)
Inventor
Sachiko Kamata
幸子 鎌田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bridgestone Corp filed Critical Bridgestone Corp
Priority to JP8260311A priority Critical patent/JPH1080923A/en
Publication of JPH1080923A publication Critical patent/JPH1080923A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
    • B29D30/0606—Vulcanising moulds not integral with vulcanising presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
    • B60C11/1218—Three-dimensional shape with regard to depth and extending direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
    • B29D30/0606—Vulcanising moulds not integral with vulcanising presses
    • B29D2030/0607—Constructional features of the moulds
    • B29D2030/0613—Means, e.g. sipes or blade-like elements, for forming narrow recesses in the tyres, e.g. cuts or incisions for winter tyres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
    • B60C2011/1213—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe sinusoidal or zigzag at the tread surface

Abstract

PROBLEM TO BE SOLVED: To improve running performance on an ice and snow road or wet road while preventing irregular wear. SOLUTION: At the time of running on an ice and snow or wet road, sipe grooves 33 tend to be blocked, but since sidewalls of protrusions 35, 36 of one and the other sides bent and protruded in a ridge state are brought into contact with one another to be supported to one another, blocking is suppressed. Since the protrusions 35, 36 formed at the sipe grooves 33 protrude in reverse (both) direction, a rubber volume of a sectional area 34 becomes substantially equal at both sides of the grooves 33. As a result, lateral rigidities become substantially uniform at either sectional area 33 to suppress occurrence of irregular wear.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】この発明は、トレッド部にサ
イプ溝を有する空気入りタイヤおよび該空気入りタイヤ
を加硫する際に用いる加硫用金型に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic tire having a sipe groove in a tread portion and a vulcanizing mold used for vulcanizing the pneumatic tire.

【０００２】[0002]

【従来の技術】一般に、氷雪路、湿潤路での走行性能を
向上させるために、トレッド部のブロック表面に幅狭の
サイプ溝（切込み）を多数形成し、該サイプ溝のエッジ
によって水膜を切るとともに、路面上の水分をサイプ溝
に吸い込ませることが行われている。しかしながら、こ
のようなサイプ溝をブロックに多数形成すると、ブロッ
クがサイプ溝によって細かく分断されるため、ブロック
の横剛性が低下し、この結果、走行時にブロックが大き
く変形してサイプ溝が閉塞し、これにより、集排水性が
低下して氷雪路、湿潤路における走行性能を充分に向上
させることができなくなってしまうという問題点があ
る。そして、このような傾向は、トレッド部の一部に硬
度（剛性）の低い発泡ゴムが用いられた氷雪路用タイヤ
においてより顕著となるのである。2. Description of the Related Art Generally, in order to improve running performance on ice and snowy roads and wet roads, a large number of narrow sipe grooves (cuts) are formed on a block surface of a tread portion, and a water film is formed by edges of the sipe grooves. In addition to cutting, moisture on the road surface is sucked into the sipe groove. However, when a large number of such sipe grooves are formed in the block, the blocks are finely divided by the sipe grooves, so that the lateral rigidity of the blocks is reduced. As a result, the blocks are greatly deformed during running and the sipe grooves are closed, As a result, there is a problem in that the drainage performance is reduced, and it becomes impossible to sufficiently improve the traveling performance on an ice-snow road or a wet road. Such a tendency is more remarkable in an ice-snow road tire in which foam rubber having low hardness (rigidity) is used in a part of the tread portion.

【０００３】このような問題を解決するため、例えば特
開平５ー５８１１８号公報に記載されているようなもの
が提案された。このものは、図１６に示すように、ブロ
ック11に形成された各サイプ溝12に一側に向かって半球
状に屈曲突出した複数の突出部13を設けたもので、該突
出部13においては凸球面状をした他側側壁13ａと凹球面
状をした一側側壁13ｂとがサイプ溝12の幅だけ離れて嵌
合しているのである。この結果、タイヤが走行してブロ
ック11が変形しようとすると、突出部13において他側側
壁13ａと一側側壁13ｂとが当接して互いに突っ張り合
い、前記ブロック11の変形が抑制されるのである。[0003] In order to solve such a problem, for example, the one described in Japanese Patent Application Laid-Open No. 5-58118 has been proposed. As shown in FIG. 16, each of the sipe grooves 12 formed in the block 11 is provided with a plurality of protrusions 13 bent in a hemispherical shape toward one side. The other side wall 13a having a convex spherical shape and the one side wall 13b having a concave spherical shape are fitted to be separated by the width of the sipe groove 12. As a result, if the block 11 is deformed due to the running of the tire, the other side wall 13a and the one side wall 13b abut on each other at the protruding portion 13 so as to bulge against each other, and the deformation of the block 11 is suppressed.

【０００４】[0004]

【発明が解決しようとする課題】しかしながら、このよ
うな従来の空気入りタイヤにあっては、各サイプ溝12に
設けられた突出部13はいずれも一側にのみ向かって突出
しているため、サイプ溝12によって区画されるゴムの容
積が突出部13の影響を受けてサイプ溝12の一側に位置す
る区画領域14より他側に位置する区画領域14で大となる
場合があり、この結果、横剛性が区画領域14により異な
ってブロック11に偏摩耗が発生することがあるという問
題点がある。However, in such a conventional pneumatic tire, since each of the protrusions 13 provided in each of the sipe grooves 12 protrudes toward only one side, the sipe There is a case where the volume of the rubber defined by the groove 12 is larger in the partition area 14 located on the other side than the partition area 14 located on one side of the sipe groove 12 under the influence of the protrusion 13, There is a problem that uneven rigidity may occur in the block 11 due to a difference in lateral rigidity depending on the partition region 14.

【０００５】この発明は、偏摩耗を抑制しながら氷雪
路、湿潤路での走行性能を向上させることができる空気
入りタイヤを提供すること、およびこのような空気入り
タイヤを加硫する際に用いる加硫用金型を提供すること
を目的とする。The present invention provides a pneumatic tire capable of improving running performance on ice and snowy roads and wet roads while suppressing uneven wear, and is used when vulcanizing such a pneumatic tire. An object of the present invention is to provide a vulcanizing mold.

【０００６】[0006]

【課題を解決するための手段】このような目的は、トレ
ッド部に設けられた周方向に延びる複数本の主溝および
これら主溝に交差する複数本の副溝とにより画成された
複数のブロックを備えるとともに、いずれかのブロック
に副溝にほぼ平行に延びるサイプ溝が形成された空気入
りタイヤにおいて、前記サイプ溝の溝幅Ｗをサイプ溝の
全域において実質上同一とするとともに、該サイプ溝に
一側に向かって山状に屈曲突出した一側突出部および他
側に向かって山状に屈曲突出した他側突出部を共に設け
ることにより、また、空気入りタイヤのトレッド部に周
方向に延びる主溝を形成する複数本の主骨および該主溝
に交差する副溝を形成する複数本の副骨が設けられると
ともに、これら主、副骨に囲まれ前記トレッド部に複数
のブロックを形成するいずれかの凹所に、副溝にほぼ平
行に延びるサイプ溝を形成するブレードが設けられたト
レッド型付け面を有する空気入りタイヤの加硫用金型に
おいて、前記ブレードを全域において実質上等厚とする
とともに、該ブレードを部分的に複数箇所で屈曲させて
一側に向かって山状に突出した一側屈曲部および他側に
向かって山状に突出した他側屈曲部を設けることにより
達成することができる。SUMMARY OF THE INVENTION Such an object is achieved by a plurality of circumferentially extending main grooves provided on a tread portion and a plurality of sub-grooves intersecting the main grooves. In a pneumatic tire having a block and a sipe groove extending substantially parallel to the sub-groove in any of the blocks, the sipe groove has a width W substantially the same over the entire area of the sipe groove, and By providing both the one-side protruding portion bent and protruding in the groove toward one side and the other-side protruding portion bent and protruding in the groove toward the other side in the groove, the circumferential direction is also provided on the tread portion of the pneumatic tire. A plurality of main bones forming a main groove extending to the main groove and a plurality of sub-bones forming a sub-groove crossing the main groove are provided, and a plurality of blocks are provided on the tread portion surrounded by these main and sub-bones. Formation A vulcanizing mold for a pneumatic tire having a tread forming surface provided with a blade forming a sipe groove extending substantially parallel to the sub-groove in any of the recesses, wherein the blade has substantially the same thickness over the entire area. Achieved by partially bending the blade at a plurality of locations and providing a one-side bent portion protruding in a mountain shape toward one side and another side bent portion protruding in a mountain shape toward the other side. can do.

【０００７】今、前述の空気入りタイヤが氷雪路または
湿潤路を走行しているとする。このとき、トレッド部の
ブロックは路面から外力を受けて変形するため、該ブロ
ックに形成されたサイプ溝は潰れて閉塞しようとする
が、前述のようにサイプ溝に一側に向かって山状に屈曲
突出した一側突出部および他側に向かって山状に屈曲突
出した他側突出部を共に設けてあるため、これら一側、
他側突出部におけるサイプ溝の側壁同士が当接して互い
に突っ張り合い、前記ブロックの変形が抑制される。こ
れにより、氷雪路、湿潤路上の水分は確実にサイプ溝内
に吸い込まれて集排水性が向上し、氷雪路、湿潤路での
走行性能が向上する。このとき、サイプ溝に形成された
一側、他側突出部はそれぞれ一側、他側に向かって山状
に突出しているため、サイプ溝によって区画される区画
領域のゴム容積は突出部が存在していてもサイプ溝の一
側に位置する区画領域と他側に位置する区画領域とでは
ほぼ等しくなり、この結果、ブロックの横剛性がいずれ
の区画領域においてもほぼ均一となって偏摩耗の発生が
効果的に抑制されるのである。Now, it is assumed that the above-mentioned pneumatic tire is running on an ice-snow road or a wet road. At this time, since the tread block is deformed by receiving an external force from the road surface, the sipe groove formed in the block is crushed and tends to be closed, but as described above, the sipe groove is formed in a mountain shape toward one side. Since both the one-side protruding portion bent and protruding and the other-side protruding portion bent and protruded in a mountain shape toward the other side are provided, these one side,
The side walls of the sipe grooves in the other-side protruding portion abut against each other and abut against each other, thereby suppressing deformation of the block. As a result, the water on the snowy and wet roads and the wet roads is surely sucked into the sipe grooves, so that the collecting and draining properties are improved, and the running performance on the ice and snowy roads and the wet roads is improved. At this time, the one side and the other side protruding portions formed in the sipe groove protrude in a mountain shape toward the one side and the other side, respectively. However, even if the partitioning area is located on one side of the sipe groove and the partitioning area located on the other side are almost equal, as a result, the lateral stiffness of the block is almost uniform in any of the partitioning areas, and uneven wear is caused. The occurrence is effectively suppressed.

【０００８】また、請求項２に記載のように構成すれ
ば、加硫後におけるサイプ溝形成用ブレードの引き抜き
を容易としながら、サイプ溝の集排水性を効果的に向上
させることができる。さらに、請求項３に記載のように
構成すれば、タイヤの走行時における一側、他側突出部
の変形を抑制することができる。そして、前述の空気入
りタイヤを加硫する際、請求項４に記載のような加硫用
金型を用いれば、前述のようなサイプ溝を正確かつ容易
に形成することができる。Further, according to the second aspect of the present invention, it is possible to effectively improve the collection and drainage of the sipe grooves while facilitating the removal of the sipe groove forming blade after vulcanization. Further, according to the structure of the third aspect, it is possible to suppress the deformation of the one-side and other-side protruding portions during running of the tire. Then, when vulcanizing the above-described pneumatic tire, if the vulcanizing mold as described in claim 4 is used, the above-mentioned sipe groove can be formed accurately and easily.

【０００９】[0009]

【発明の実施の形態】以下、この発明の第１実施形態を
図面に基づいて説明する。図１、２において、21は氷雪
性能に優れた空気入りタイヤ22のトレッド部であり、こ
のトレッド部21には２層のゴム層、ここでは半径方向外
側に位置し路面に接する外側ゴム層23と、半径方向内側
に位置する内側ゴム層24とが配置され、前記外側ゴム層
23は発泡ゴム、即ち内部に多数の独立気泡を有するゴム
から構成され、一方、内側ゴム層24はショアーＡ硬度が
前記外側ゴム層23のショアーＡ硬度より高い通常ゴム
（非発泡ゴム）から構成されている。そして、前記外側
ゴム層23のトレッドゴム全体に対する体積割合は、氷雪
性能を向上させるためには10％以上とする必要がある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. 1 and 2, reference numeral 21 denotes a tread portion of a pneumatic tire 22 having excellent ice and snow performance. The tread portion 21 has two rubber layers, here an outer rubber layer 23 located radially outward and in contact with the road surface. And an inner rubber layer 24 located radially inward, and the outer rubber layer
Reference numeral 23 denotes a foamed rubber, that is, a rubber having a large number of closed cells inside, while the inner rubber layer 24 is formed of a normal rubber (non-foamed rubber) having a Shore A hardness higher than the Shore A hardness of the outer rubber layer 23. Have been. The volume ratio of the outer rubber layer 23 to the entire tread rubber needs to be 10% or more in order to improve ice and snow performance.

【００１０】前記トレッド部21の外表面には、周方向に
延びるとともに軸方向に離れた複数本、ここでは４本の
主溝26と、これら主溝26に直角に交差するとともに最外
側の両主溝26において終了する周方向に離れた複数本の
副溝27とが形成されている。この結果、最外側に位置す
る２本の主溝26間のトレッド部21には、これら主溝26と
副溝27とによって矩形のブロック28が複数個画成され、
また、最外側に位置する２本の主溝26とトレッド端Ｔと
の間のトレッド部21には周方向に連続して延びるリブ29
がそれぞれ形成されている。On the outer surface of the tread portion 21, a plurality of main grooves 26 extending in the circumferential direction and spaced apart in the axial direction, in this case, four main grooves A plurality of circumferentially separated sub-grooves 27 ending in the main groove 26 are formed. As a result, in the tread portion 21 between the two outermost main grooves 26, a plurality of rectangular blocks 28 are defined by the main grooves 26 and the sub-grooves 27,
A rib 29 extending continuously in the circumferential direction is provided in the tread portion 21 between the two outermost main grooves 26 and the tread end T.
Are formed respectively.

【００１１】前記ブロック28のうちのいずれかのブロッ
ク28、ここでは全部のブロック28の外表面には１個以上
（３個）のサイプ溝33がそれぞれ形成され、これらサイ
プ溝33は副溝27にほぼ平行に延びるとともに両端が主溝
26において開口している。これにより、各ブロック28は
これらサイプ溝33により周方向に離れた複数、ここでは
４個の区画領域34に区画されるが、これらの区画領域34
のゴム体積はいずれの区画領域34においてもほぼ等し
い。また、これらサイプ溝33の深さは前記主溝26、副溝
27の溝深さより若干浅く、最深部は外側ゴム層23を越え
て内側ゴム層24まで侵入している。前記サイプ溝33の溝
幅Ｗは前記主、副溝26、27の溝幅に比較してかなり狭
く、通常 0.5mmから 1.5mmであり、また、サイプ溝33の
全域において実質上同一である。そして、このようにサ
イプ溝33の溝幅Ｗがサイプ溝33の全域において実質上同
一であると、該サイプ溝33の側壁の一部が部分的に内側
に膨出することで溝幅が部分的に狭くなるような場合に
比較し、集排水性が向上する。One or more (three) sipe grooves 33 are formed on the outer surface of any one of the blocks 28, here, all the blocks 28, and these sipe grooves 33 are formed by the sub-grooves 27. The main groove extends almost parallel to both ends
Open at 26. As a result, each block 28 is divided into a plurality of, in this case, four divided areas 34 separated in the circumferential direction by these sipe grooves 33.
Are substantially equal in any of the divided areas 34. The depths of the sipe grooves 33 are the same as those of the main groove 26 and the sub
The groove is slightly shallower than the groove depth of 27, and the deepest portion penetrates the outer rubber layer 23 to the inner rubber layer 24. The groove width W of the sipe groove 33 is considerably smaller than the groove widths of the main and sub-grooves 26 and 27, usually 0.5 mm to 1.5 mm, and is substantially the same throughout the sipe groove 33. When the groove width W of the sipe groove 33 is substantially the same over the entire area of the sipe groove 33, a part of the side wall of the sipe groove 33 partially bulges inward, so that the groove width is partially reduced. The collection and drainage properties are improved as compared to the case where the area becomes narrower.

【００１２】図２、３、４、５において、各サイプ溝33
には複数、ここでは６個の一側突出部35、および複数、
ここでは一側突出部35と同数である６個の他側突出部36
が形成され、これら一側突出部35と他側突出部36とはサ
イプ溝33の長手方向および半径方向に交互に配置されて
いる。ここで、前記一側突出部35は一側に向かって山
状、ここでは截頭円錐状に屈曲突出し、一方、他側突出
部36は他側に向かって山状、ここでは截頭円錐状に屈曲
突出しているが、これら一側、他側突出部35、36が設け
られていない残りの部位、即ち本体部37は平板状を呈し
ている。そして、これら一側、他側突出部35、36は実質
上同一量だけ一側、他側にそれぞれ突出しており、その
突出高さＨ、Ｊはサイプ溝33の溝幅Ｗの 0.5〜 3.0倍の
範囲内であることが好ましい。その理由は、前記突出高
さＨ、Ｊが溝幅Ｗの 0.5倍未満であると、ブロックの28
の変形を充分に抑制することができず、この結果、サイ
プ溝33の集排水性を効果的に向上させることができなく
なるからであり、一方、 3.0倍を超えると、加硫後にお
いてサイプ溝形成用ブレードの引き抜きが困難となるか
らである。また、これら一側、他側突出部35、36は数、
形状が共に同一であり、このようなことから一側に突出
したゴムの合計突出体積と他側に突出したゴムの合計突
出体積とはほぼ等しく、この結果、各区画領域34の横剛
性は一側、他側突出部35、36の存在に拘らずほぼ等しく
なる。ここで、前記一側突出部35の中央部には該一側突
出部35における他側側壁35ａと一側側壁35ｂとを連結す
る円柱状の連結ゴム38が設けられ、これらの連結ゴム38
はサイプ溝33の側壁に対して直交して延び、タイヤ22の
走行時における一側突出部35の潰れ変形を抑制して集排
水性の低下を防止する。一方、他側突出部36の中央部に
も該他側突出部36における他側側壁36ａと一側側壁36ｂ
とを連結する円柱状の連結ゴム39が設けられ、これらの
連結ゴム39はサイプ溝33の側壁に対して直交して延び、
タイヤ22の走行時における他側突出部36の潰れ変形を抑
制して集排水性の低下を防止する。2, 3, 4, and 5, each sipe groove 33
Has a plurality, here six one-side protrusions 35, and a plurality,
Here, six other-side protrusions 36 having the same number as the one-side protrusion 35 are provided.
The one-side protrusions 35 and the other-side protrusions 36 are alternately arranged in the longitudinal direction and the radial direction of the sipe groove 33. Here, the one side protruding portion 35 is bent and protruded in a mountain shape, here a frusto-conical shape, while the other side protruding portion 36 is a mountain shape toward the other side, here a frusto-conical shape. The remaining portion where the one side and the other side protruding portions 35 and 36 are not provided, that is, the main body portion 37 has a flat plate shape. The one side and the other side protruding portions 35 and 36 respectively protrude to the one side and the other side by substantially the same amount, and their protruding heights H and J are 0.5 to 3.0 times the groove width W of the sipe groove 33. Is preferably within the range. The reason is that if the protruding heights H and J are less than 0.5 times the groove width W, the blocks 28
This is because the deformation of the sipe groove 33 cannot be sufficiently suppressed, and as a result, the water collecting and draining properties of the sipe groove 33 cannot be effectively improved. This is because it becomes difficult to pull out the forming blade. In addition, these one side, the other side protrusions 35, 36 are number,
The shapes are the same, and the total protruding volume of the rubber protruding to one side is substantially equal to the total protruding volume of the rubber protruding to the other side. Regardless of the presence of the protrusions 35 and 36 on the side and the other side, they become substantially equal. Here, a cylindrical connecting rubber 38 for connecting the other side wall 35a and the one side wall 35b of the one side protruding portion 35 is provided at a central portion of the one side protruding portion 35, and these connecting rubbers 38 are provided.
Extends perpendicularly to the side wall of the sipe groove 33, and suppresses the crush deformation of the one-side protruding portion 35 during running of the tire 22, thereby preventing a decrease in water collecting and draining performance. On the other hand, the other side wall 36a and the one side wall 36b of the other side protrusion 36 are also provided at the center of the other side protrusion 36.
Is provided, and these connecting rubbers 39 extend orthogonally to the side walls of the sipe grooves 33,
When the tire 22 is running, the other-side protruding portion 36 is suppressed from being crushed and deformed, so that the collection / drainability is prevented from lowering.

【００１３】また、前記リブ29にも副溝27にほぼ平行に
延びる複数のサイプ溝40が形成されているが、これらの
サイプ溝40は内側端がリブ29の途中で終了した半盲サイ
プであり、他の点は前記サイプ溝33と同様である。The rib 29 is also provided with a plurality of sipe grooves 40 extending substantially parallel to the sub-groove 27. These sipe grooves 40 are semi-blind sipes whose inner ends are terminated in the middle of the rib 29. The other points are the same as those of the sipe groove 33.

【００１４】今、前述の空気入りタイヤ22が氷雪路また
は湿潤路を走行しているとする。このとき、トレッド部
21のブロック28は路面から周方向の外力を受けて変形す
るため、該ブロック28に形成されたサイプ溝33は潰れて
閉塞しようとするが、前述のようにサイプ溝33には一側
に向かって山状に屈曲突出した一側突出部35および他側
に向かって山状に屈曲突出した他側突出部36が共に設け
られているため、これら一側、他側突出部35、36におけ
る他側側壁35ａ、36ａと一側側壁35ｂ、36ｂとが当接し
て互いに突っ張り合い、前記ブロック28の変形が抑制さ
れる。これにより、氷雪路、湿潤路上の水分は確実にサ
イプ溝33内に吸い込まれて集排水性が向上し、氷雪路、
湿潤路での走行性能が向上する。このとき、一側、他側
突出部35、36はサイプ溝33から逆方向に山状に突出し、
しかも、突出したゴムの合計突出体積は互いにほぼ等し
いため、サイプ溝33によって区画される区画領域34のゴ
ム容積は、これら突出部35、36が存在していても、任意
のサイプ溝33の一側に位置する区画領域34と他側に位置
する区画領域34とでほぼ等しくなり、この結果、横剛性
がいずれの区画領域34においてもほぼ均一となって偏摩
耗の発生が効果的に抑制されるのである。なお、サイプ
溝40の作用も前述と同様であるNow, it is assumed that the aforementioned pneumatic tire 22 is traveling on an icy road or a wet road. At this time, the tread part
Since the block 28 of 21 is deformed by receiving a circumferential external force from the road surface, the sipe groove 33 formed in the block 28 is crushed and closes, but as described above, the sipe groove 33 faces one side. Since one side protruding portion 35 that bends and protrudes in a mountain shape and another side protruding portion 36 that protrudes in a mountain shape toward the other side are provided together, the other side protruding portions 35 and 36 The side walls 35a, 36a and the one side walls 35b, 36b abut against each other and abut against each other, so that the deformation of the block 28 is suppressed. As a result, the water on the icy road and the wet road is surely sucked into the sipe groove 33, and the water collecting and draining property is improved.
The running performance on wet roads is improved. At this time, the one side and the other side protrusions 35 and 36 protrude from the sipe groove 33 in the opposite direction in a mountain shape,
In addition, since the total protruding volumes of the protruding rubbers are substantially equal to each other, the rubber volume of the partition area 34 partitioned by the sipe grooves 33 is equal to that of any of the sipe grooves 33 even if these protruding portions 35 and 36 exist. The partition area 34 located on the side is substantially equal to the partition area 34 located on the other side. As a result, the lateral rigidity is substantially uniform in any of the partition areas 34, and the occurrence of uneven wear is effectively suppressed. Because The operation of the sipe groove 40 is the same as described above.

【００１５】図２、６、７において、41は前述の空気入
りタイヤ22を加硫する際に使用する加硫用金型であり、
この加硫用金型41はトレッド部21を型付けするトレッド
型付け面42を有する。このトレッド型付け面42にはほぼ
周方向に延びるとともに軸方向に離れた複数本、ここで
は４本の突出した主骨43と、これら主骨43に直角に交差
し周方向に離れた複数本の副骨44とが設けられ、主骨43
は未加硫タイヤのトレッド部21に主溝26を、副骨44は副
溝27を形成する。ここで、副骨44は最外側の主骨43にお
いて終了しており、この結果、前記トレッド型付け面42
には最外側の２本の主骨43と副骨44とによって囲まれた
複数の凹所46が形成され、これらの凹所46は未加硫タイ
ヤのトレッド部21にブロック28を形成する。また、最外
側の２本の主骨43とトレッド型付け面42の両端との間の
環状凹所によりリブ29が形成される。2, 6, and 7, reference numeral 41 denotes a vulcanizing mold used for vulcanizing the pneumatic tire 22 described above.
The vulcanizing mold 41 has a tread molding surface 42 for molding the tread portion 21. The tread surface 42 has a plurality of main bones 43 extending substantially in the circumferential direction and spaced apart in the axial direction, here, four protruding main bones 43, and a plurality of main bones 43 intersecting at right angles to the main bones 43 and separated in the circumferential direction. The main bone 43 is provided with the accessory bone 44.
The main groove 26 is formed in the tread portion 21 of the unvulcanized tire, and the sub bone 44 forms the sub groove 27. Here, the accessory bone 44 terminates at the outermost main bone 43, and as a result, the tread mold surface 42
Are formed with a plurality of recesses 46 surrounded by two outermost main bones 43 and accessory bones 44, and these recesses 46 form blocks 28 in the tread portion 21 of the unvulcanized tire. The rib 29 is formed by an annular recess between the two outermost main bones 43 and both ends of the tread forming surface 42.

【００１６】50はブロック28の外表面にサイプ溝33を形
成するためのブレードであり、これらのブレード50は少
なくとも一部の凹所46、ここでは全部の凹所46に１個以
上、ここでは３個ずつ設けられている。各ブレード50は
半径方向外端部に埋設部51を有し、この埋設部51は加硫
用金型41に埋設されている。52は前記埋設部51から半径
方向内側に向かって延びるサイプ形成部であり、このサ
イプ形成部52は前記凹所46の表面（底面）から突出して
いる。また、前記サイプ形成部52は副骨44にほぼ平行に
延びるとともに両端が主骨43に接触し、その高さはいず
れの位置においても同一で、前記主骨43、副骨44の高さ
より若干低い。この結果、各凹所46はこれらブレード50
のサイプ形成部52により周方向に離れた複数、ここでは
４個の区画領域53に区画されるが、これらの区画領域53
の容積はいずれの区画領域53においてもほぼ等しい。ま
た、前記ブレード50の肉厚Ｎは前記主、副骨43、44の肉
厚に比較してかなり薄く、通常 0.5mmから 1.5mmであ
り、また、全域において実質上等厚である。Reference numeral 50 denotes blades for forming sipe grooves 33 on the outer surface of the block 28. These blades 50 are provided in at least some of the recesses 46, here at least one in all the recesses 46, Three are provided. Each blade 50 has a buried portion 51 at the outer end in the radial direction, and the buried portion 51 is buried in the vulcanizing mold 41. Reference numeral 52 denotes a sipe forming portion extending radially inward from the buried portion 51. The sipe forming portion 52 protrudes from the surface (bottom surface) of the recess 46. In addition, the sipe forming portion 52 extends substantially parallel to the accessory bone 44 and both ends contact the main bone 43, and the height thereof is the same at any position, and is slightly higher than the height of the main bone 43 and the accessory bone 44. Low. As a result, each recess 46 has these blades 50
Are divided into a plurality of, in this case, four, divided areas 53 separated in the circumferential direction by the sipe forming section 52.
Are substantially equal in any of the divided areas 53. The thickness N of the blade 50 is considerably smaller than the thickness of the main and sub bones 43 and 44, usually 0.5 mm to 1.5 mm, and is substantially the same throughout the entire area.

【００１７】各ブレード50にはサイプ形成部52をエンボ
ス加工により部分的に複数箇所、ここでは６箇所で屈曲
させて形成した一側屈曲部55および一側屈曲部55と同数
箇所（６箇所）で屈曲させて形成した他側屈曲部56が設
けられ、これら一側屈曲部55と他側屈曲部56とはブレー
ド50の長手方向および半径方向に交互に配置されてい
る。ここで、前記一側屈曲部55は一側に向かって山状、
ここでは截頭円錐状に突出し、一方、他側屈曲56は他側
に向かって山状、ここでは截頭円錐状に突出している
が、これら一側、他側屈曲部55、56が設けられていない
残りの部位、即ち本体部57は平板状を呈している。そし
て、これら一側、他側屈曲部55、56は実質上同一量だけ
一側、他側にそれぞれ突出し、各サイプ溝33に一側、他
側突出部35、36を形成する。また、これら一側、他側屈
曲部55、56は数、形状が共に同一であり、このようなこ
とから一側への合計突出体積と他側への合計突出体積と
はほぼ等しく、この結果、前記区画領域53の容積は一
側、他側屈曲部55、56の存在に拘らずほぼ等しくなる。
ここで、前記一側、他側屈曲部55、56の中央部には断面
円形の貫通孔58、59がそれぞれ形成され、これらの貫通
孔58、59は本体部57に対して直交して延び、各サイプ溝
33に円柱状の連結ゴム38、39を形成する。また、最外側
の２本の主骨43とトレッド型付け面42の両端との間の環
状凹所には、図示していないがサイプ溝40を形成するた
めのブレードが設けられている。In each blade 50, a sipe forming portion 52 is partially bent by embossing at a plurality of portions, in this case, one side bent portion 55 formed by bending at six positions, and the same number of positions (six positions) as the one side bent portion 55. The other-side bent portion 56 is formed by bending the blade 50. The one-side bent portion 55 and the other-side bent portion 56 are alternately arranged in the longitudinal direction and the radial direction of the blade 50. Here, the one-side bent portion 55 has a mountain shape toward one side,
Here, it protrudes in a truncated cone shape, while the other side bend 56 projects in a mountain shape toward the other side, here a frustoconical shape, but these one side, the other side bends 55 and 56 are provided. The remaining portion, that is, the main body portion 57 has a flat plate shape. The one-side and other-side bent portions 55 and 56 project by substantially the same amount to the one side and the other side, respectively, and form one-side and other-side protrusions 35 and 36 in each sipe groove 33. In addition, these one side and the other side bent portions 55 and 56 are the same in number and shape, and from this, the total protruding volume to one side and the total protruding volume to the other side are almost equal, and as a result, The volume of the divided area 53 is substantially equal regardless of the existence of the bent portions 55 and 56 on one side and the other side.
Here, through-holes 58, 59 having a circular cross section are formed in the central portions of the one-side and other-side bent portions 55, 56, respectively, and these through-holes 58, 59 extend orthogonally to the main body 57. , Each sipe groove
33 are formed with cylindrical connecting rubbers 38 and 39. A blade (not shown) for forming a sipe groove 40 is provided in the annular recess between the two outermost main bones 43 and both ends of the tread forming surface 42.

【００１８】そして、このような加硫用金型41を用いて
未加硫タイヤを加硫する場合には、該未加硫タイヤを加
硫用金型41に収納した後、ブラダ内に高温、高圧の加硫
媒体を注入して該未加硫タイヤをトレッド型付け面42を
含む型付け面に押し付ける。このとき、主骨43、副骨4
4、ブレード50のサイプ形成部52は未加硫タイヤのトレ
ッド部21に押し込まれ、該トレッド部21の外表面に複数
の主溝26、副溝27が、また、これら主溝26、副溝27によ
って画成されたブロック28の外表面には前述のようなサ
イプ溝33が正確かつ容易に形成される。その後、加硫用
金型41を開放するが、このとき、ブレード50は連結ゴム
38、39の途中を切断しながらトレッド部21から引き抜か
れるため、連結ゴム38、39はサイプ溝33内に残留するの
である。When vulcanizing an unvulcanized tire using such a vulcanizing mold 41, the unvulcanized tire is stored in the vulcanizing mold 41 and then placed in a bladder at a high temperature. The unvulcanized tire is pressed against a molding surface, including the tread molding surface 42, by injecting a high pressure vulcanizing medium. At this time, main bone 43, accessory bone 4
4. The sipe forming portion 52 of the blade 50 is pushed into the tread portion 21 of the unvulcanized tire, and a plurality of main grooves 26 and sub-grooves 27 are formed on the outer surface of the tread portion 21. A sipe groove 33 as described above is accurately and easily formed on the outer surface of the block 28 defined by 27. Thereafter, the vulcanizing mold 41 is opened, and at this time, the blade 50
The connection rubbers 38 and 39 remain in the sipe groove 33 because the connection rubbers 38 and 39 are pulled out from the tread portion 21 while cutting the middle of the connection 38 and 39.

【００１９】図８、９はこの発明の第２実施形態を示す
図である。この実施形態においては、ブレード60から矩
形の舌片を複数箇所において切り起こして屈曲させ、一
側に向かって三角山状に突出した一側屈曲部61と他側に
向かって三角山状に突出した他側屈曲部62とを形成する
ようにしている。この結果、これらブレード60を用いて
トレッド部21にサイプ溝を形成すると、該サイプ溝には
前記一側、他側屈曲部61、62と補完関係にある一側、他
側突出部が形成される。そして、これら一側、他側屈曲
部61、62の突出端とブレード60の平坦な本体部63との間
にはスリット状の間隙が形成されるため、前記サイプ溝
の一側側壁と他側側壁とはスリット状の連結ゴムにより
連結される。なお、他の構成、作用は前記第１実施形態
と同様である。FIGS. 8 and 9 show a second embodiment of the present invention. In this embodiment, a rectangular tongue piece is cut and raised at a plurality of positions from the blade 60 and bent, and one side bent portion 61 protruding in a triangular mountain shape toward one side and projecting in a triangular mountain shape toward the other side. The other-side bent portion 62 is formed. As a result, when a sipe groove is formed in the tread portion 21 using these blades 60, the sipe groove is formed with the one side and the other side protrusion that are complementary to the one side, the other side bent parts 61 and 62. You. Since a slit-shaped gap is formed between the protruding ends of these one-side and other-side bent portions 61 and 62 and the flat main body 63 of the blade 60, one side wall of the sipe groove and the other side are formed. The side wall is connected by a slit-shaped connection rubber. Other configurations and operations are the same as those of the first embodiment.

【００２０】図１０、１１はこの発明の第３実施形態を
示す図である。この実施形態においては、ブレード65に
一側に向かって突出した一側屈曲部66と他側に向かって
突出した他側屈曲部67とをそれぞれ複数個形成し、これ
らの一側、他側屈曲部66、67を断面長円形に形成すると
ともに、千鳥状に配列している。この結果、これらブレ
ード65を用いてトレッド部21にサイプ溝を形成すると、
該サイプ溝には前記一側、他側屈曲部66、67と補完関係
にある一側、他側突出部が形成される。なお、他の構
成、作用は前記第１実施形態と同様である。FIGS. 10 and 11 show a third embodiment of the present invention. In this embodiment, the blade 65 is formed with a plurality of one-side bent portions 66 protruding toward one side and a plurality of other-side bent portions 67 protruding toward the other side. The portions 66 and 67 are formed in an oval cross section, and are arranged in a staggered manner. As a result, when a sipe groove is formed in the tread portion 21 using these blades 65,
In the sipe groove, one-side and other-side protruding portions which are complementary to the one-side and other-side bent portions 66 and 67 are formed. Other configurations and operations are the same as those of the first embodiment.

【００２１】図１２、１３はこの発明の第４実施形態を
示す図である。この実施形態においては、ブレード70に
一側に向かって突出した断面円形の一側屈曲部71と他側
に向かって突出した断面矩形の他側屈曲部72とをそれぞ
れ複数個形成し、前記一側、他側屈曲部71、72をブレー
ド70の長手方向に交互に配列している。この結果、これ
らブレード70を用いてトレッド部21にサイプ溝を形成す
ると、該サイプ溝には前記一側、他側屈曲部71、72と補
完関係にある一側、他側突出部が形成される。なお、他
の構成、作用は前記第１実施形態と同様である。FIGS. 12 and 13 show a fourth embodiment of the present invention. In this embodiment, a plurality of one-side bent portions 71 having a circular cross section protruding toward one side and other-side bent portions 72 having a rectangular cross section protruding toward the other side are formed on the blade 70, respectively. The side and other side bent portions 71 and 72 are alternately arranged in the longitudinal direction of the blade 70. As a result, when a sipe groove is formed in the tread portion 21 using these blades 70, the sipe groove is formed with the one side, the other side projection that is complementary to the one side, the other side bent parts 71 and 72, and the other side. You. Other configurations and operations are the same as those of the first embodiment.

【００２２】図１４、１５はこの発明の第５実施形態を
示す図である。この実施形態においては、ブレード75に
一側に向かって突出した断面ハート形である１個の一側
屈曲部76と他側に向かって突出した断面矩形である複数
個の他側屈曲部77とをそれぞれ形成し、前記一側屈曲部
76をブレード75の長手方向中央部に、他側屈曲部77をブ
レード70の長手方向両端部にそれぞれ配置している。こ
の結果、これらブレード75を用いてトレッド部21にサイ
プ溝を形成すると、該サイプ溝には前記一側、他側屈曲
部76、77と補完関係にある一側、他側突出部が形成され
る。なお、他の構成、作用は前記第１実施形態と同様で
ある。FIGS. 14 and 15 show a fifth embodiment of the present invention. In this embodiment, the blade 75 has one one-side bent portion 76 having a heart-shaped cross section protruding toward one side and a plurality of other-side bent portions 77 having a rectangular cross section protruding toward the other side. Are formed, and the one-side bent portion is formed.
76 is arranged at the center of the blade 75 in the longitudinal direction, and the other-side bent portion 77 is arranged at both ends of the blade 70 in the longitudinal direction. As a result, when a sipe groove is formed in the tread portion 21 using these blades 75, the sipe groove is formed with the one side and the other side protrusion that are complementary to the one side and the other side bent portions 76 and 77. You. Other configurations and operations are the same as those of the first embodiment.

【００２３】なお、前述の実施形態においては、トレッ
ド部21を発泡ゴムからなる外側ゴム層23と通常ゴム（非
発泡ゴム）からなる内側ゴム層24との２層のゴム層から
構成したが、この発明においてはトレッド部21全体を通
常ゴムから構成してもよい。また、この発明において
は、一側、他側突出部を断面形状がＸ形、菱形、六角形
等のものとしてもよい。In the above-described embodiment, the tread portion 21 is composed of the two rubber layers of the outer rubber layer 23 made of foamed rubber and the inner rubber layer 24 made of normal rubber (non-foamed rubber). In the present invention, the entire tread portion 21 may be made of ordinary rubber. Further, in the present invention, the one side and the other side protruding portions may have an X-shaped, diamond-shaped, hexagonal or the like cross-sectional shape.

【００２４】[0024]

【発明の効果】以上説明したように、この発明によれ
ば、偏摩耗を抑制しながら氷雪路、湿潤路での走行性能
を向上させることができる。As described above, according to the present invention, it is possible to improve running performance on icy and snowy roads and wet roads while suppressing uneven wear.

【図面の簡単な説明】[Brief description of the drawings]

【図１】この発明の第１実施形態を示すトレッド部の平
面図である。FIG. 1 is a plan view of a tread portion showing a first embodiment of the present invention.

【図２】ブロックを示す一部破断斜視図である。FIG. 2 is a partially cutaway perspective view showing a block.

【図３】図２のＩーＩ矢視断面図である。FIG. 3 is a sectional view taken along the line II of FIG. 2;

【図４】図２のIIーII矢視断面図である。FIG. 4 is a sectional view taken along the line II-II in FIG. 2;

【図５】図２のIIIーIII矢視断面図である。FIG. 5 is a sectional view taken along the line III-III in FIG. 2;

【図６】加硫用金型を示す一部破断斜視図である。FIG. 6 is a partially cutaway perspective view showing a vulcanizing mold.

【図７】図６のIVーIV矢視断面図である。FIG. 7 is a sectional view taken along the line IV-IV in FIG. 6;

【図８】この発明の第２実施形態を示すブレードの一部
破断斜視図である。FIG. 8 is a partially broken perspective view of a blade showing a second embodiment of the present invention.

【図９】図８のＶーＶ矢視断面図である。FIG. 9 is a sectional view taken along the line VV of FIG. 8;

【図１０】この発明の第３実施形態を示すブレード近傍
の正面図である。FIG. 10 is a front view showing the vicinity of a blade according to a third embodiment of the present invention.

【図１１】図１０のVIーVI矢視断面図である。FIG. 11 is a sectional view taken along the line VI-VI in FIG. 10;

【図１２】この発明の第４実施形態を示すブレード近傍
の正面図である。FIG. 12 is a front view showing the vicinity of a blade according to a fourth embodiment of the present invention.

【図１３】図１２のVIIーVII矢視断面図である。13 is a sectional view taken along the line VII-VII in FIG.

【図１４】この発明の第５実施形態を示すブレード近傍
の正面図である。FIG. 14 is a front view showing the vicinity of a blade according to a fifth embodiment of the present invention.

【図１５】図１４のVIIIーVIII矢視断面図である。15 is a sectional view taken along the line VIII-VIII in FIG.

【図１６】従来のサイプ溝を示すブロックの断面図であ
る。FIG. 16 is a sectional view of a block showing a conventional sipe groove.

【符号の説明】[Explanation of symbols]

21…トレッド部 22…空気入りタイヤ 26…主溝 27…副溝 28…ブロック 33…サイプ溝 35…一側突出部 36…他側突出部 38、39…連結ゴム 41…加硫用金型 42…トレッド型付け面 43…主骨 44…副骨 46…凹所 50…ブレード 55…一側屈曲部 56…他側屈曲部 21 ... Tread 22 ... Pneumatic tire 26 ... Main groove 27 ... Sub groove 28 ... Block 33 ... Sipe groove 35 ... One side protruding part 36 ... Other side protruding part 38,39 ... Connecting rubber 41 ... Vulcanizing mold 42 … Tread surface 43… main bone 44… accessory bone 46… recess 50… blade 55… one side bend 56… other side bend

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ２９Ｋ 105:24 Ｂ２９Ｌ 30:00 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code Agency reference number FI Technical display location B29K 105: 24 B29L 30:00

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】トレッド部に設けられた周方向に延びる複
数本の主溝およびこれら主溝に交差する複数本の副溝と
により画成された複数のブロックを備えるとともに、い
ずれかのブロックに副溝にほぼ平行に延びるサイプ溝が
形成された空気入りタイヤにおいて、前記サイプ溝の溝
幅Ｗをサイプ溝の全域において実質上同一とするととも
に、該サイプ溝に一側に向かって山状に屈曲突出した一
側突出部および他側に向かって山状に屈曲突出した他側
突出部を共に設けたことを特徴とする空気入りタイヤ。A plurality of blocks defined by a plurality of circumferentially extending main grooves provided on a tread portion and a plurality of sub-grooves intersecting the main grooves are provided. In a pneumatic tire in which a sipe groove extending substantially parallel to the sub-groove is formed, the groove width W of the sipe groove is made substantially the same over the entire area of the sipe groove, and the sipe groove is formed in a mountain shape toward one side. A pneumatic tire having both a one-side protruding portion bent and protruding and a second-side protruding portion bent in a mountain shape toward the other side. 【請求項２】前記一側、他側突出部の高さＨ、Ｊを共に
サイプ溝の溝幅Ｗの 0.5〜 3.0倍の範囲内とした請求項
１記載の空気入りタイヤ。2. The pneumatic tire according to claim 1, wherein the heights H and J of the one side and the other side protrusions are both within a range of 0.5 to 3.0 times the width W of the sipe groove. 【請求項３】前記一側、他側突出部の配置位置にサイプ
溝の一側側壁と他側側壁とを連結する連結ゴムを設けた
請求項１記載の空気入りタイヤ。3. The pneumatic tire according to claim 1, wherein a connecting rubber for connecting one side wall and the other side wall of the sipe groove is provided at a position where the one side and the other side projecting portions are arranged. 【請求項４】空気入りタイヤのトレッド部に周方向に延
びる主溝を形成する複数本の主骨および該主溝に交差す
る副溝を形成する複数本の副骨が設けられるとともに、
これら主、副骨に囲まれ前記トレッド部に複数のブロッ
クを形成するいずれかの凹所に、副溝にほぼ平行に延び
るサイプ溝を形成するブレードが設けられたトレッド型
付け面を有する空気入りタイヤの加硫用金型において、
前記ブレードを全域において実質上等厚とするととも
に、該ブレードを部分的に複数箇所で屈曲させて一側に
向かって山状に突出した一側屈曲部および他側に向かっ
て山状に突出した他側屈曲部を設けたことを特徴とする
空気入りタイヤの加硫用金型。4. A plurality of main bones forming a main groove extending in a circumferential direction and a plurality of sub-bones forming a sub-groove intersecting the main groove are provided on a tread portion of the pneumatic tire.
A pneumatic tire having a tread-molded surface provided with a blade that forms a sipe groove extending substantially parallel to a sub-groove in any of the recesses surrounded by the main and sub-bones and forming a plurality of blocks in the tread portion. In the vulcanizing mold of
The blade has substantially the same thickness throughout the entire area, and the blade is partially bent at a plurality of locations and protrudes in a mountain shape toward one side and protrudes in a mountain shape toward the other side. A vulcanizing mold for a pneumatic tire, comprising a bent portion on the other side.
JP8260311A 1996-09-09 1996-09-09 Pneumatic tire and vulcanizing mold for pneumatic tire Withdrawn JPH1080923A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8260311A JPH1080923A (en) 1996-09-09 1996-09-09 Pneumatic tire and vulcanizing mold for pneumatic tire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8260311A JPH1080923A (en) 1996-09-09 1996-09-09 Pneumatic tire and vulcanizing mold for pneumatic tire

Publications (1)

Publication Number Publication Date
JPH1080923A true JPH1080923A (en) 1998-03-31

Family

ID=17346270

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8260311A Withdrawn JPH1080923A (en) 1996-09-09 1996-09-09 Pneumatic tire and vulcanizing mold for pneumatic tire

Country Status (1)

Country Link
JP (1) JPH1080923A (en)

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KR20010036390A (en) * 1999-10-08 2001-05-07 조충환 Low noise tire
JP2002187412A (en) * 2000-12-20 2002-07-02 Toyo Tire & Rubber Co Ltd Pneumatic tire
JP2002356105A (en) * 2001-05-31 2002-12-10 Toyo Tire & Rubber Co Ltd Pneumatic tire
WO2003033281A1 (en) * 2001-10-11 2003-04-24 Societe De Technologie Michelin Tyre tread comprising incisions and a blade used to mould said incisions
US6668886B1 (en) * 1999-02-18 2003-12-30 Sumitomo Rubber Industries, Ltd. Vehicle tire having sipes
EP1533141A1 (en) * 2003-11-20 2005-05-25 The Goodyear Tire & Rubber Company Three-dimensional sipes for treads
JP2008087648A (en) * 2006-10-03 2008-04-17 Bridgestone Corp Pneumatic tire
US7467652B2 (en) * 2004-08-06 2008-12-23 The Goodyear Tire & Rubber Company Three-dimensional tread sipes and mold blade for forming three-dimensional tread sipes
WO2011091870A1 (en) * 2010-02-01 2011-08-04 Continental Reifen Deutschland Gmbh Vehicle tyre
US20120018069A1 (en) * 2010-07-23 2012-01-26 The Yokohama Rubber Co., Ltd. Pneumatic tire
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JP2012224117A (en) * 2011-04-15 2012-11-15 Toyo Tire & Rubber Co Ltd Pneumatic tire
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US9162535B2 (en) 2011-01-19 2015-10-20 The Yokohama Rubber Co., Ltd. Pneumatic tire
US20150321520A1 (en) * 2014-05-07 2015-11-12 Hankook Tire Co., Ltd. Pneumatic tire for vehicle
EP2868494A4 (en) * 2012-06-29 2016-05-11 Yokohama Rubber Co Ltd Pneumatic tire
WO2016158459A1 (en) * 2015-03-31 2016-10-06 コンパニー ゼネラール デ エタブリッスマン ミシュラン Tire mold molding element, tire vulcanization molding mold, and tire
WO2016158460A1 (en) * 2015-03-31 2016-10-06 コンパニー ゼネラール デ エタブリッスマン ミシュラン Tire mold molding element, tire vulcanization molding mold, and tire
CN107921826A (en) * 2015-08-11 2018-04-17 大陆轮胎德国有限公司 Pneumatic vehicle tire
CN109070653A (en) * 2016-04-20 2018-12-21 株式会社普利司通 Tire and tire-mold
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US6668886B1 (en) * 1999-02-18 2003-12-30 Sumitomo Rubber Industries, Ltd. Vehicle tire having sipes
KR20010036390A (en) * 1999-10-08 2001-05-07 조충환 Low noise tire
JP2002187412A (en) * 2000-12-20 2002-07-02 Toyo Tire & Rubber Co Ltd Pneumatic tire
JP2002356105A (en) * 2001-05-31 2002-12-10 Toyo Tire & Rubber Co Ltd Pneumatic tire
CN1313290C (en) * 2001-10-11 2007-05-02 米其林技术公司 Tread comprising incisions and lamella for molding these incisions
WO2003033281A1 (en) * 2001-10-11 2003-04-24 Societe De Technologie Michelin Tyre tread comprising incisions and a blade used to mould said incisions
US7225844B2 (en) 2001-10-11 2007-06-05 Michelin Recherche Et Technique S.A. Tread comprising incisions and lamella for molding these incisions
CN100352676C (en) * 2003-11-20 2007-12-05 固特异轮胎和橡胶公司 Three-dimensional sipes for treads
US7143799B2 (en) * 2003-11-20 2006-12-05 The Goodyear Tire & Rubber Company Three-dimensional sipes for treads
JP2005153870A (en) * 2003-11-20 2005-06-16 Goodyear Tire & Rubber Co:The Three-dimensional sipe for tread
EP1533141A1 (en) * 2003-11-20 2005-05-25 The Goodyear Tire & Rubber Company Three-dimensional sipes for treads
US7467652B2 (en) * 2004-08-06 2008-12-23 The Goodyear Tire & Rubber Company Three-dimensional tread sipes and mold blade for forming three-dimensional tread sipes
JP2008087648A (en) * 2006-10-03 2008-04-17 Bridgestone Corp Pneumatic tire
WO2011091870A1 (en) * 2010-02-01 2011-08-04 Continental Reifen Deutschland Gmbh Vehicle tyre
US9180739B2 (en) * 2010-07-23 2015-11-10 The Yokohama Rubber Co., Ltd. Pneumatic tire
US20120018069A1 (en) * 2010-07-23 2012-01-26 The Yokohama Rubber Co., Ltd. Pneumatic tire
EP2465709A1 (en) * 2010-12-15 2012-06-20 Nokian Renkaat Oyj Vehicle tire and tire tread band
RU2494879C2 (en) * 2010-12-15 2013-10-10 Нокиан Ренкаат Ойй Automotive tire, tire tread and lamellas
US9162535B2 (en) 2011-01-19 2015-10-20 The Yokohama Rubber Co., Ltd. Pneumatic tire
JP2012224117A (en) * 2011-04-15 2012-11-15 Toyo Tire & Rubber Co Ltd Pneumatic tire
US9827812B2 (en) 2012-06-29 2017-11-28 The Yokohama Rubber Co., Ltd. Pneumatic tire
EP2868494A4 (en) * 2012-06-29 2016-05-11 Yokohama Rubber Co Ltd Pneumatic tire
WO2014064936A1 (en) * 2012-10-24 2014-05-01 株式会社ブリヂストン Pneumatic tire
JPWO2014064936A1 (en) * 2012-10-24 2016-09-08 株式会社ブリヂストン Pneumatic tire
US10507696B2 (en) 2012-10-24 2019-12-17 Bridgestone Corporation Pneumatic tire
US20150321520A1 (en) * 2014-05-07 2015-11-12 Hankook Tire Co., Ltd. Pneumatic tire for vehicle
US9764600B2 (en) * 2014-05-07 2017-09-19 Hankook Tire Co., Ltd. Pneumatic tire for vehicle
WO2016158459A1 (en) * 2015-03-31 2016-10-06 コンパニー ゼネラール デ エタブリッスマン ミシュラン Tire mold molding element, tire vulcanization molding mold, and tire
US10493709B2 (en) 2015-03-31 2019-12-03 Compagnie Generale Des Etablissements Michelin Tire molding element, tire vulcanization mold, and tire
WO2016158460A1 (en) * 2015-03-31 2016-10-06 コンパニー ゼネラール デ エタブリッスマン ミシュラン Tire mold molding element, tire vulcanization molding mold, and tire
CN107921826A (en) * 2015-08-11 2018-04-17 大陆轮胎德国有限公司 Pneumatic vehicle tire
CN109070653A (en) * 2016-04-20 2018-12-21 株式会社普利司通 Tire and tire-mold
EP3446891A4 (en) * 2016-04-20 2019-04-24 Bridgestone Corporation Tire and tire mold
CN109070653B (en) * 2016-04-20 2020-12-01 株式会社普利司通 Tire and tire mold
CN109435112A (en) * 2018-10-25 2019-03-08 上海众力投资发展有限公司 A kind of die-filling tooling
EP4212362A1 (en) * 2022-01-14 2023-07-19 Nokian Renkaat Oyj A tire and a lamella plate for the manufacture of a sipe of a tire

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