JPH1142719A - Method and apparatus for producing pneumatic tire having static-eliminating function - Google Patents
Method and apparatus for producing pneumatic tire having static-eliminating functionInfo
- Publication number
- JPH1142719A JPH1142719A JP10016388A JP1638898A JPH1142719A JP H1142719 A JPH1142719 A JP H1142719A JP 10016388 A JP10016388 A JP 10016388A JP 1638898 A JP1638898 A JP 1638898A JP H1142719 A JPH1142719 A JP H1142719A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- belt
- cut
- layer
- tread rubber
- 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- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 9
- 229920001971 elastomer Polymers 0.000 claims abstract description 273
- 239000005060 rubber Substances 0.000 claims abstract description 273
- 239000004020 conductor Substances 0.000 claims abstract description 39
- 230000003068 static effect Effects 0.000 claims abstract description 39
- 239000000945 filler Substances 0.000 claims abstract description 35
- 230000005611 electricity Effects 0.000 claims abstract description 14
- 238000005520 cutting process Methods 0.000 claims description 31
- 238000004519 manufacturing process Methods 0.000 claims description 28
- 230000008030 elimination Effects 0.000 claims description 26
- 238000003379 elimination reaction Methods 0.000 claims description 26
- 230000002950 deficient Effects 0.000 claims description 11
- 239000004568 cement Substances 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 7
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000003860 storage Methods 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000011324 bead Substances 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 238000004073 vulcanization Methods 0.000 description 3
- 239000004636 vulcanized rubber Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- 239000005062 Polybutadiene Substances 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229920003052 natural elastomer Polymers 0.000 description 2
- 229920001194 natural rubber Polymers 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 229920003244 diene elastomer Polymers 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
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)
- B29D30/52—Unvulcanised treads, e.g. on used tyres; Retreading
- B29D2030/526—Unvulcanised treads, e.g. on used tyres; Retreading the tread comprising means for discharging the electrostatic charge, e.g. conductive elements or portions having conductivity higher than the tread rubber
Landscapes
- Tires In General (AREA)
- Tyre Moulding (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、静電気を車両か
ら路面に逃がすことができる除電機能付き空気入りタイ
ヤの製造方法および装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a pneumatic tire having a static elimination function capable of discharging static electricity from a vehicle to a road surface.
【０００２】[0002]
【従来の技術および発明が解決しようとする課題】近
年、湿潤路面でのグリップ性、コーナリング性、耐摩耗
性等を同時に満足させるため、トレッドゴム層をケイ酸
を高い割合で含む不良導電性ゴムから構成した空気入り
タイヤが提案された。ここで、このような空気入りタイ
ヤはトレッドゴム層が電気の導通を遮断するため、車両
に多量の静電気が溜ることがある。2. Description of the Related Art In recent years, defective conductive rubbers containing a high proportion of silicic acid in a tread rubber layer have been developed in order to simultaneously satisfy grip properties, cornering properties, abrasion resistance and the like on wet road surfaces. Has been proposed. Here, in such a pneumatic tire, a large amount of static electricity may accumulate in the vehicle because the tread rubber layer blocks conduction of electricity.
【０００３】このような問題点を解決するため、従来、
例えば特開平９ー７１１１２号公報に記載されているよ
うな空気入りタイヤ、即ち、ベルト層の半径方向外側に
配置されたトレッドゴム層を、半径方向内側に位置し良
導電性ゴムからなる内側ゴム層と半径方向外側に位置し
不良導電性ゴムからなる外側ゴム層とから構成するとと
もに、該外側ゴム層内に周方向に連続して延び内側ゴム
層から外側ゴム層の外表面まで至る良導電性ゴムから構
成された導電体を設け、車両に溜った静電気を内側ゴム
層、導電体を通じて路面に逃がすようにした空気入りタ
イヤが提案された。また、このような空気入りタイヤを
基にすれば、トレッドゴム層全体が不良導電性ゴムから
構成された空気入りタイヤにおいて、該トレッドゴム層
内に、周方向に連続して延びベルト層から外表面に至る
良導電性ゴムから構成された導電体を設け、車両に溜っ
た静電気を導電体を通じて路面に逃がすようにしたもの
も容易に考え付くことができる。In order to solve such a problem, conventionally,
For example, a pneumatic tire as described in Japanese Patent Application Laid-Open No. 9-71112, that is, a tread rubber layer disposed radially outside a belt layer is provided with an inner rubber made of a highly conductive rubber positioned radially inward. A conductive layer extending from the inner rubber layer to the outer surface of the outer rubber layer while continuously extending in the circumferential direction into the outer rubber layer. 2. Description of the Related Art A pneumatic tire has been proposed in which a conductor made of conductive rubber is provided, and static electricity accumulated in a vehicle is released to a road surface through an inner rubber layer and a conductor. Further, based on such a pneumatic tire, in a pneumatic tire in which the entire tread rubber layer is made of defective conductive rubber, the pneumatic tire continuously extends in the circumferential direction into the tread rubber layer, and extends outside the belt layer. It is also possible to easily conceive a device provided with a conductor made of a highly conductive rubber reaching the surface so that static electricity accumulated in the vehicle is released to the road surface through the conductor.
【０００４】この発明は、前述のような除電機能付き空
気入りタイヤを簡単かつ確実に製造することができる製
造方法および装置を提供することを目的とする。[0004] An object of the present invention is to provide a manufacturing method and apparatus capable of easily and reliably manufacturing the above-described pneumatic tire with a static elimination function.
【０００５】[0005]
【課題を解決するための手段】このような目的は、第１
に、ベルト層の半径方向外側に配置されたトレッドゴム
層を、半径方向内側に位置し良導電性ゴムからなる内側
ゴム層と半径方向外側に位置し不良導電性ゴムからなる
外側ゴム層とから構成するとともに、外側ゴム層内に内
側ゴム層から外側ゴム層の外表面まで延び良導電性ゴム
からなる導電体を設けることで静電気を車両から路面に
逃がすようにした除電機能付き空気入りタイヤの製造方
法であって、未加硫ゴムからなる内側、外側ゴム体を積
層して構成した帯状トレッドゴムの外側ゴム体を切断手
段により長手方向に切断して外表面から内側ゴム体に至
る切れ目を形成するとともに、該切れ目に未加硫の良導
電性ゴムからなる充填物を充填する工程と、グリーンケ
ースの外側にベルト層および前記帯状トレッドゴムを内
側ゴム体が半径方向内側になるようにして貼付けた後、
加硫を行って前記帯状トレッドゴムをトレッドゴム層
と、内側、外側ゴム体を内側、外側ゴム層と、充填物を
導電体とする工程とを備えた製造方法により、第２に、
ベルト層の半径方向外側に配置された不良導電性ゴムか
らなるトレッドゴム層内に、ベルト層から外表面まで延
びた良導電性ゴムからなる導電体を設けることで静電気
を車両から路面に逃がすようにした除電機能付き空気入
りタイヤの製造方法であって、未加硫ゴムからなる帯状
トレッドゴムを切断手段により長手方向に切断して外表
面から内表面に至る切れ目を形成するとともに、該切れ
目に未加硫の良導電性ゴムからなる充填物を充填する工
程と、グリーンケースの外側にベルト層および前記帯状
トレッドゴムを貼付けた後、加硫を行って前記帯状トレ
ッドゴムをトレッドゴム層と、充填物を導電体とする工
程とを備えた製造方法により、第３に、ベルト層の半径
方向外側に配置されたトレッドゴム層を、半径方向内側
に位置し良導電性ゴムからなる内側ゴム層と半径方向外
側に位置し不良導電性ゴムからなる外側ゴム層とから構
成するとともに、外側ゴム層内に内側ゴム層から外側ゴ
ム層の外表面まで延び良導電性ゴムからなる導電体を設
けることで静電気を車両から路面に逃がすようにした除
電機能付き空気入りタイヤの製造装置であって、未加硫
ゴムからなる内側、外側ゴム体を積層して構成した帯状
トレッドゴムの外側ゴム体を長手方向に切断して外表面
から内側ゴム体に至る切れ目を形成する切断手段と、該
切れ目に未加硫の良導電性ゴムからなる充填物を充填す
る充填手段とを備え、前記充填物が充填された帯状トレ
ッドゴムを含む生タイヤを加硫することで帯状トレッド
ゴムをトレッドゴム層と、内側、外側ゴム体を内側、外
側ゴム層と、充填物を導電体とする製造装置により、第
４に、ベルト層の半径方向外側に配置された不良導電性
ゴムからなるトレッドゴム層内に、ベルト層から外表面
まで延びた良導電性ゴムからなる導電体を設けることで
静電気を車両から路面に逃がすようにした除電機能付き
空気入りタイヤの製造装置であって、未加硫ゴムからな
る帯状トレッドゴムを長手方向に切断して外表面から内
表面に至る切れ目を形成する切断手段と、該切れ目に未
加硫の良導電性ゴムからなる充填物を充填する充填手段
とを備え、前記充填物が充填された帯状トレッドゴムを
含む生タイヤを加硫することで帯状トレッドゴムをトレ
ッドゴム層と、充填物を導電体とする製造装置により、
達成することができる。SUMMARY OF THE INVENTION The purpose of the invention is as follows.
The tread rubber layer disposed radially outside of the belt layer is composed of an inner rubber layer located on the inner side in the radial direction and made of good conductive rubber and an outer rubber layer located on the outer side in the radial direction and made of bad conductive rubber. A pneumatic tire with a static elimination function that is configured to extend static electricity from the vehicle to the road surface by providing a conductor made of a highly conductive rubber extending from the inner rubber layer to the outer surface of the outer rubber layer within the outer rubber layer. A manufacturing method, wherein the outer rubber body of the belt-shaped tread rubber formed by laminating the inner and outer rubber bodies made of unvulcanized rubber is cut in a longitudinal direction by a cutting means to cut the cut from the outer surface to the inner rubber body. Forming and filling a filler made of an unvulcanized good conductive rubber into the cut, and forming a belt layer and the belt-like tread rubber on the outer side of the green case so that the inner rubber body has a radial direction. After pasted set to be on the inside,
Second, by a manufacturing method comprising a step of vulcanizing the belt-shaped tread rubber to form a tread rubber layer, an inside, an outside rubber body to an inside, an outside rubber layer, and a step of using a filler as a conductor.
By providing a conductor made of good conductive rubber extending from the belt layer to the outer surface in the tread rubber layer made of defective conductive rubber placed radially outside the belt layer, static electricity can escape from the vehicle to the road surface. A method for manufacturing a pneumatic tire with a static elimination function according to the above, wherein a band-shaped tread rubber made of unvulcanized rubber is cut in the longitudinal direction by cutting means to form a cut from the outer surface to the inner surface, and the cut A step of filling a filler made of unvulcanized good conductive rubber, and after attaching the belt layer and the belt-shaped tread rubber to the outside of the green case, vulcanizing the belt-shaped tread rubber to form a tread rubber layer, Thirdly, the tread rubber layer disposed radially outside the belt layer is positioned radially inward and has good conductivity by the method including the step of using the filler as a conductor. The inner rubber layer made of rubber and the outer rubber layer located on the outside in the radial direction and made of defective conductive rubber, and extends from the inner rubber layer to the outer surface of the outer rubber layer in the outer rubber layer. An apparatus for manufacturing a pneumatic tire with a static elimination function that allows static electricity to escape from a vehicle to a road surface by providing a conductive material, and a belt-shaped tread rubber formed by laminating inner and outer rubber bodies made of unvulcanized rubber Cutting means for cutting the outer rubber body in the longitudinal direction to form a cut from the outer surface to the inner rubber body, and filling means for filling the cut with a filler made of unvulcanized good conductive rubber. By vulcanizing a green tire containing a band-shaped tread rubber filled with the filler, the band-shaped tread rubber and the tread rubber layer, the inside and outside rubber bodies are inside and outside rubber layers, and the filling is a conductor. Fourth, by providing a conductor made of good conductive rubber extending from the belt layer to the outer surface in the tread rubber layer made of defective conductive rubber disposed radially outside the belt layer by the fabricating device. An apparatus for manufacturing a pneumatic tire with a static elimination function for discharging static electricity from a vehicle to a road surface, wherein a strip-shaped tread rubber made of unvulcanized rubber is cut in a longitudinal direction to form a cut from an outer surface to an inner surface. A cutting means, and a filling means for filling a filling made of an unvulcanized good conductive rubber into the cut, and vulcanizing a green tire containing the band-like tread rubber filled with the filling to form a belt-like tread. Tread rubber layer with rubber, by the manufacturing equipment using the filler as a conductor,
Can be achieved.
【０００６】請求項１、７に記載の発明の場合には、ま
ず、未加硫ゴムからなる帯状トレッドゴムを成形した
後、該帯状トレッドゴムの外側ゴム体を切断手段により
長手方向に切断して外表面から内側ゴム体に至る切れ目
を形成するとともに、該切れ目に未加硫の良導電性ゴム
からなる充填物を充填手段により充填する。その後、グ
リーンケースの外側にベルト層および前記帯状トレッド
ゴムを内側ゴム体が外側ゴム体より半径方向内側になる
ようにして貼付け、その後、加硫を行って帯状トレッド
ゴムをトレッドゴム層と、内側、外側ゴム体を内側、外
側ゴム層と、充填物を内側ゴム層まで延びる導電体とす
る。このように通常のタイヤの製造工程の途中に切れ目
の形成および該切れ目への充填物の充填を行うだけでよ
いため、除電機能付き空気入りタイヤを簡単かつ確実に
製造することができる。また、請求項２、８に記載の発
明の場合には、まず、未加硫ゴムからなる帯状トレッド
ゴムを成形した後、該帯状トレッドゴムを切断手段によ
り長手方向に切断して外表面から内表面に至る切れ目を
形成するとともに、該切れ目に未加硫の良導電性ゴムか
らなる充填物を充填手段により充填する。その後、グリ
ーンケースの外側にベルト層および前記帯状トレッドゴ
ムを貼付け、その後、加硫を行って帯状トレッドゴムを
トレッドゴム層と、充填物をベルト層まで延びる導電体
とする。このように通常のタイヤの製造工程の途中に切
れ目の形成および該切れ目への充填物の充填を行うだけ
でよいため、前述と同様に除電機能付き空気入りタイヤ
を簡単かつ確実に製造することができる。According to the first and seventh aspects of the present invention, first, a band-shaped tread rubber made of unvulcanized rubber is formed, and the outer rubber body of the band-shaped tread rubber is cut in a longitudinal direction by cutting means. And forming a cut from the outer surface to the inner rubber body, and filling the cut with a filling made of unvulcanized good conductive rubber by a filling means. Thereafter, the belt layer and the belt-shaped tread rubber are attached to the outside of the green case such that the inner rubber body is radially inner than the outer rubber body, and then vulcanization is performed to apply the belt-shaped tread rubber to the tread rubber layer and the inside. The outer rubber body is an electric conductor extending to the inner and outer rubber layers, and the filler is an electric conductor extending to the inner rubber layer. As described above, it is only necessary to form a cut and fill the cut with a filler in the middle of a normal tire manufacturing process, so that a pneumatic tire with a static elimination function can be easily and reliably manufactured. In the case of the inventions according to claims 2 and 8, first, a band-shaped tread rubber made of unvulcanized rubber is formed, and then the band-shaped tread rubber is cut in a longitudinal direction by a cutting means to form an inner surface from the outer surface. A cut is formed to the surface, and the cut is filled with a filler made of unvulcanized good conductive rubber by the filling means. Thereafter, the belt layer and the belt-like tread rubber are adhered to the outside of the green case, and then vulcanization is performed so that the belt-like tread rubber becomes a tread rubber layer and the filler becomes a conductor extending to the belt layer. In this way, since it is only necessary to form a cut and fill the cut with a filler in the middle of a normal tire manufacturing process, a pneumatic tire with a static elimination function can be easily and reliably manufactured as described above. it can.
【０００７】また、前述の請求項３に記載のように構成
すれば、充填が確実となり充填不良を抑制することがで
きる。さらに、請求項４、５に記載のように構成すれ
ば、細溝が切断時のガイドとなるため、切れ目の形成位
置が正確となるとともに、切断手段によって切断する外
側ゴム体または帯状トレッドゴムの厚さが薄くなるた
め、切断作業が容易となる。また、請求項６に記載のよ
うに構成すれば、切れ目を高能率で形成することができ
る。さらに、請求項９に記載のように構成すれば、切れ
目の形成が確実となる。[0007] Further, according to the third aspect of the present invention, filling is ensured and defective filling can be suppressed. Further, according to the present invention, since the narrow groove serves as a guide at the time of cutting, the cut position is accurate, and the outer rubber body or the band-shaped tread rubber cut by the cutting means is formed. Since the thickness is reduced, the cutting operation is facilitated. In addition, according to the sixth aspect, the cut can be formed with high efficiency. Further, according to the ninth aspect, formation of a cut is ensured.
【０００８】[0008]
【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において、11は除電機能
を有する空気入りラジアルタイヤであり、このタイヤ11
は一対のビードコア12と、これら一対のビードコア12間
においてトロイダル状に延びるカーカス層13とを有して
いる。このカーカス層13は少なくとも１枚、ここでは１
枚のカーカスプライ14から構成されるとともに、その両
端部がビードコア12の周りを軸方向内側から軸方向外側
に向かって巻き上げられている。そして、前記カーカス
プライ14の内部にはラジアル方向（子午線方向）に延び
るコードが多数本埋設されている。前記カーカス層13の
半径方向外側にはベルト層16が設けられ、このベルト層
16は内部にコードが埋設されたベルトプライ17を複数枚
積層することにより構成している。そして、これらベル
トプライ17にそれぞれ埋設されたコードはタイヤ赤道面
Ｓに対して所定の角度で交差するとともに、少なくとも
２枚のベルトプライ17間において交差している。前記ベ
ルト層16の半径方向外側には加硫済みゴムからなるトレ
ッドゴム層18が配置され、このトレッドゴム層18の外表
面には周方向に延びる複数本の主溝19および該主溝19に
交差する図示していない複数本の横溝が形成されてい
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 11 denotes a pneumatic radial tire having a static elimination function.
Has a pair of bead cores 12 and a carcass layer 13 extending in a toroidal shape between the pair of bead cores 12. This carcass layer 13 has at least one sheet, here 1
The carcass ply 14 is formed, and both ends of the carcass ply 14 are wound around the bead core 12 from the inside in the axial direction to the outside in the axial direction. A large number of cords extending in the radial direction (meridian direction) are embedded in the carcass ply 14. A belt layer 16 is provided on the outside of the carcass layer 13 in the radial direction.
Reference numeral 16 is formed by laminating a plurality of belt plies 17 each having a cord embedded therein. The cords embedded in the belt plies 17 intersect at a predetermined angle with respect to the tire equatorial plane S, and intersect at least between the two belt plies 17. A tread rubber layer 18 made of vulcanized rubber is disposed radially outside the belt layer 16, and a plurality of circumferentially extending main grooves 19 and main grooves 19 are formed on the outer surface of the tread rubber layer 18. A plurality of intersecting lateral grooves (not shown) are formed.
【０００９】前記トレッドゴム層18は、半径方向内側に
位置する内側ゴム層21と半径方向外側に位置する外側ゴ
ム層22とを半径方向に重ね合わせることにより構成され
ており、前記内側ゴム層21は良導電性ゴムから、一方、
外側ゴム層22は不良導電性ゴムから構成されている。こ
こで、良導電性ゴムとは電気抵抗値が 107Ω・cm未満の
ゴムのことをいい、天然ゴム、ジエン系ゴム等のゴム成
分中に、カーボンブラック、カーボンファイバー、グラ
ファイト等のカーボン系導電性付与材や、例えばアルミ
ニウム粉などの金属粉、金属酸化物、金属フレーク、金
属繊維等の金属系導電性付与材が所定量添加されたゴム
を挙げることができ、一方、不良導電性ゴムとは電気抵
抗値が 107Ω・cm以上のゴムのことをいい、ケイ酸を高
い割合で含むゴムを挙げることができる。以下の表１に
外側ゴム層22を構成する不良導電性ゴムの一例を示す
が、この表１において、ＮＲは天然ゴム、ＳＢＲはスチ
レンブタジエンゴム、ＢＲはブタジエンゴムである。The tread rubber layer 18 is formed by radially overlapping an inner rubber layer 21 located on the inner side in the radial direction and an outer rubber layer 22 located on the outer side in the radial direction. Is made of good conductive rubber,
The outer rubber layer 22 is made of defective conductive rubber. Here, a good conductive rubber refers to a rubber having an electric resistance value of less than 10 7 Ω · cm, and includes a carbon component such as carbon black, carbon fiber, and graphite in a rubber component such as natural rubber and diene rubber. Examples of the conductivity-imparting material include rubber to which a predetermined amount of a metal-based conductivity-imparting material such as metal powder such as aluminum powder, metal oxide, metal flake, and metal fiber is added. The term “rubber” refers to a rubber having an electric resistance value of 10 7 Ω · cm or more, and includes a rubber containing a high proportion of silicic acid. Table 1 below shows an example of defective conductive rubber constituting the outer rubber layer 22. In Table 1, NR is natural rubber, SBR is styrene butadiene rubber, and BR is butadiene rubber.
【表１】 前記外側ゴム層22内、詳しくは主溝19間の陸部には周方
向に連続して延びる狭幅リング状の導電体23が複数（２
個）設けられ、これらの導電体23は加硫済みの良導電性
のゴムから構成されている。また、これら導電体23の幅
は0.01〜 0.5mmの範囲が好ましい。その理由は、幅が0.
01mm未満であると、導電体23の製造が困難となるからで
あり、 0.5mmを超えると、導電体23の半径方向内端から
亀裂が発生することがあるからである。さらに、これら
の導電体23は、半径方向内端が内側ゴム層21内に若干侵
入し、半径方向外端が外側ゴム層22の外表面に露出する
ことで、内側ゴム層21から外側ゴム層22の外表面まで延
びている。なお、24、25は内、外側ゴム層21、22の幅方
向両外側に配置されたサイドゴム層であり、これらのサ
イドゴム層24、25は前述の不良導電性ゴムから構成され
ている。[Table 1] A plurality of narrow ring-shaped conductors 23 (2) extending continuously in the circumferential direction are provided in the outer rubber layer 22, specifically, in the land portion between the main grooves 19.
The conductors 23 are made of vulcanized and highly conductive rubber. The width of these conductors 23 is preferably in the range of 0.01 to 0.5 mm. The reason is that the width is 0.
If it is less than 01 mm, it becomes difficult to manufacture the conductor 23, and if it exceeds 0.5 mm, a crack may be generated from the inner end in the radial direction of the conductor 23. Further, these conductors 23 are formed such that the inner ends in the radial direction slightly penetrate into the inner rubber layer 21 and the outer ends in the radial direction are exposed on the outer surface of the outer rubber layer 22. Extends to the outer surface of 22. 24 and 25 are side rubber layers disposed on both outer sides in the width direction of the inner and outer rubber layers 21 and 22, respectively. These side rubber layers 24 and 25 are made of the above-described defective conductive rubber.
【００１０】次に、このようなタイヤ11の製造方法につ
いて説明する。まず、未加硫ゴムを図２に示すような押
出し機の口金31から押し出して、横断面形状が図３に示
すような帯状トレッドゴム36を成形するが、この帯状ト
レッドゴム36は、内側ゴム体32を半径方向内側に、外側
ゴム体33を半径方向外側にして積層するとともに、これ
ら内側、外側ゴム体32、33の両側端にサイドゴム34、35
をそれぞれ配置したものである。この押出し時、前記口
金31の押出し口31ａの上端には下方に向かって延びる複
数（２個）の突起37が設けられているため、これら突起
37によって外側ゴム体33の外表面に長手方向に延びる複
数本（２本）の細溝38が形成される。Next, a method of manufacturing such a tire 11 will be described. First, unvulcanized rubber is extruded from a die 31 of an extruder as shown in FIG. 2 to form a band-shaped tread rubber 36 having a cross-sectional shape as shown in FIG. The body 32 is laminated radially inward and the outer rubber body 33 is laminated radially outward, and side rubbers 34, 35 are attached to both ends of the inner and outer rubber bodies 32, 33.
Are arranged respectively. At the time of this extrusion, a plurality of (two) projections 37 extending downward are provided at the upper end of the extrusion opening 31a of the base 31.
The plurality of (two) narrow grooves 38 extending in the longitudinal direction are formed on the outer surface of the outer rubber body 33 by the 37.
【００１１】次に、図４、５、６に示すような切断装置
39を用いて外側ゴム体33の切断を行う。ここで、前記切
断装置39は帯状トレッドゴム36の直上に設置された可動
フレーム40を有し、この可動フレーム40にはモータ41に
よって駆動走行され帯状トレッドゴム36の長手方向に平
行に延びるベルト42が１箇所で連結されている。この結
果、前記モータ41が作動してベルト42が走行すると、可
動フレーム40は帯状トレッドゴム36の長手方向に移動す
る。前記可動フレーム40には帯状トレッドゴム36の幅方
向に延びる水平なシャフト43の両端部が軸受44を介して
回転可能に支持されるとともに、このシャフト43の外周
には該シャフト43と同軸で切断手段としての円板状カッ
ター45が軸方向に離れて複数固定されており、この結
果、これらカッター45は帯状トレッドゴム36の幅方向に
延びる軸線を中心としてシャフト43と一体となって回転
することができる。各カッター45の両端面でその半径方
向外側部にはほぼ半径方向に延びる多数の浅溝46が周方
向に離れて形成され、これらの浅溝46はカッター45の半
径方向外端において開口している。前記シャフト43より
上方の可動フレーム40には収納槽47が取り付けられ、こ
の収納槽47内には未加硫の良導電性ゴム48が収納されて
いる。ここで、前述の良導電性ゴム48としては、ヘキサ
ン、石油エーテル、ヘプタン、テトラヒドロフラン（Ｔ
ＨＦ）、シクロヘキサン等の有機溶媒に、バンバリー、
ロール等で練られたゴム組成物を混合、攪拌し、均一に
分散させて得た有機ゴムセメント、あるいは、ゴムラテ
ックスにカーボンブラック分散水を混合、攪拌させて得
た水ベースセメントを用いることができ、これら有機ゴ
ムセメント、水ベースセメントの一例を前記表１に示
す。そして、この収納槽47の底壁に形成されたスリット
49を通して前記カッター45の上部が収納槽47に挿入され
ており、この結果、この収納槽47内に位置している部位
のカッター45の浅溝46には前記良導電性ゴム48が流れ込
んで充満する。なお、50はカッター45の半径方向外端に
形成された複数の切り欠きであり、これらの切り欠き50
はカッター45による外側ゴム体33の切断時、該カッター
45の外側ゴム体33への噛み込みを確実としている。前述
したモータ41、ベルト42は全体として、カッター45を帯
状トレッドゴム36の長手方向に移動させる移動手段51を
構成する。Next, a cutting device as shown in FIGS.
The outer rubber body 33 is cut using 39. Here, the cutting device 39 has a movable frame 40 installed directly above the belt-shaped tread rubber 36, and the movable frame 40 is driven and driven by a motor 41 and extends in a belt 42 extending parallel to the longitudinal direction of the belt-shaped tread rubber 36. Are connected at one place. As a result, when the motor 41 operates and the belt 42 runs, the movable frame 40 moves in the longitudinal direction of the belt-like tread rubber 36. Both ends of a horizontal shaft 43 extending in the width direction of the belt-like tread rubber 36 are rotatably supported on the movable frame 40 via bearings 44, and the outer periphery of the shaft 43 is cut coaxially with the shaft 43. A plurality of disc-shaped cutters 45 as means are fixed apart from each other in the axial direction, and as a result, these cutters 45 rotate integrally with the shaft 43 about an axis extending in the width direction of the belt-shaped tread rubber 36. Can be. A large number of shallow grooves 46 extending substantially in the radial direction are formed in the radially outer portions on both end surfaces of each cutter 45 at circumferentially spaced positions, and these shallow grooves 46 are opened at the radial outer end of the cutter 45. I have. A storage tank 47 is attached to the movable frame 40 above the shaft 43, and an unvulcanized good conductive rubber 48 is stored in the storage tank 47. Here, hexane, petroleum ether, heptane, tetrahydrofuran (T
HF), organic solvents such as cyclohexane, Banbury,
It is possible to use an organic rubber cement obtained by mixing and stirring a rubber composition kneaded with a roll or the like and uniformly dispersing it, or a water-based cement obtained by mixing and stirring carbon black dispersion water in rubber latex. Examples of these organic rubber cements and water-based cements are shown in Table 1 above. And the slit formed in the bottom wall of this storage tank 47
The upper portion of the cutter 45 is inserted into the storage tank 47 through 49, and as a result, the good conductive rubber 48 flows into the shallow groove 46 of the cutter 45 located in the storage tank 47 and is filled. I do. Reference numeral 50 denotes a plurality of cutouts formed at the outer end of the cutter 45 in the radial direction.
Is the cutter 45 when the outer rubber body 33 is cut by the cutter 45.
The engagement of the 45 with the outer rubber body 33 is ensured. The above-described motor 41 and belt 42 as a whole constitute moving means 51 for moving the cutter 45 in the longitudinal direction of the belt-shaped tread rubber 36.
【００１２】そして、このような切断装置39を用いて外
側ゴム体33の切断を行う場合には、前記カッター45を外
側ゴム体33の細溝38の溝底に押し付けながら移動手段51
によって可動フレーム40を押出し直後の帯状トレッドゴ
ム36の長手方向に移動させる。これにより、外側ゴム体
33は回転するカッター45によって押し切られ、外側ゴム
体33の外表面から内側ゴム体32に至る、ここでは内側ゴ
ム体32内に若干量侵入するとともに、長手方向に直線状
に延びる切れ目52が高能率でかつ確実に形成される。こ
のとき、前述のように細溝38上において外側ゴム体33を
カッター45により切断するようにすれば、細溝38がカッ
ター45のガイドとして機能するため、切れ目52の形成位
置が正確となるとともに、カッター45によって切断する
外側ゴム体33の厚さが薄くなるため、切断作業が容易と
なる。そして、このように切れ目52を形成すると、カッ
ター45は回転によって外側ゴム体33から上側に抜け出て
いくが、このとき、カッター45の浅溝46を充満していた
良導電性ゴム48は外側ゴム体33の切れ目52の内面に付着
して切れ目52内に取り残される。このようにして切れ目
52に良導電性ゴム48からなる充填物53が該切れ目52の形
成と同時に流し込まれて充填される。そして、充填され
る良導電性ゴム48が前述のようにセメント状に溶かした
ものであると、切れ目52に広く行き渡り、この結果、切
れ目52への充填物53の充填が確実となって充填不良を抑
制することができる。ここで、隣接する浅溝46間の周方
向距離が短い場合には、切れ目52に充填された充填物53
（良導電性ゴム48）が充填後に互いにつながり、周方向
に連続した状態となるが、隣接する浅溝46間の周方向距
離が長い場合には、切れ目52に充填された充填物53（良
導電性ゴム48）は充填後に互いにつながることはないた
め、これら充填物53は周方向に断続して設けられること
となる。前述した浅溝46、収納槽47は全体として、前記
切れ目52に充填物53を充填する充填手段54を構成する。When cutting the outer rubber body 33 by using such a cutting device 39, the moving means 51 is pressed while pressing the cutter 45 against the bottom of the narrow groove 38 of the outer rubber body 33.
Thereby, the movable frame 40 is moved in the longitudinal direction of the belt-like tread rubber 36 immediately after being extruded. This allows the outer rubber body
33 is pushed off by the rotating cutter 45, and extends from the outer surface of the outer rubber body 33 to the inner rubber body 32. Here, a small amount of cut 52 that penetrates into the inner rubber body 32 and extends linearly in the longitudinal direction is formed. It is formed efficiently and reliably. At this time, if the outer rubber body 33 is cut by the cutter 45 on the narrow groove 38 as described above, the narrow groove 38 functions as a guide for the cutter 45, so that the formation position of the cut 52 becomes accurate. Since the thickness of the outer rubber body 33 cut by the cutter 45 is reduced, the cutting operation is facilitated. When the cut 52 is formed in this way, the cutter 45 comes out of the outer rubber body 33 upward by rotation, but at this time, the good conductive rubber 48 filling the shallow groove 46 of the cutter 45 is It adheres to the inner surface of the cut 52 of the body 33 and is left inside the cut 52. Breaks in this way
A filler 53 made of a good conductive rubber 48 is poured into and filled with the cut 52 at the same time as the cut 52 is formed. If the good conductive rubber 48 to be filled is dissolved in a cement form as described above, it widely spreads over the cut 52, and as a result, the filling of the filler 53 into the cut 52 becomes reliable and the filling failure occurs. Can be suppressed. Here, when the circumferential distance between the adjacent shallow grooves 46 is short, the filling material 53
(Good conductive rubbers 48) are connected to each other after filling and become continuous in the circumferential direction. However, when the circumferential distance between adjacent shallow grooves 46 is long, the filling material 53 (good Since the conductive rubbers 48) do not connect to each other after the filling, these fillings 53 are provided intermittently in the circumferential direction. The above-mentioned shallow groove 46 and the storage tank 47 constitute a filling means 54 for filling the gap 52 with the filling material 53 as a whole.
【００１３】次に、図示していない成形ドラムによって
グリーンケースを成形するとともに、図示していないバ
ンドドラムの周囲にベルト層および前記帯状トレッドゴ
ム36を貼付けてバンドを成形した後、該バンドを前記グ
リーンケースの外側に内側ゴム体32が外側ゴム体33より
半径方向内側になるようにして貼付け、生タイヤを成形
する。次に、図示していない加硫装置を用いて前記生タ
イヤの加硫を行う。これにより、未加硫ゴムからなる内
側、外側ゴム体32、33、サイドゴム34、35、帯状トレッ
ドゴム36は加硫されてそれぞれ加硫済みゴムの内側、外
側ゴム層21、22、サイドゴム層24、25、トレッドゴム層
18に、また、前記切れ目52に充填された未加硫ゴムから
なる充填物53は加硫されて加硫済みゴムの導電体23とな
る。ここで、前述のように切れ目52に充填物53が周方向
に断続して設けられている場合には、充填物53間の開い
ている切れ目52は、この加硫時に再び閉じられて完全に
元の状態と同様に塞がれる。このように通常のタイヤの
製造工程の途中に切れ目52の形成および該切れ目52への
充填物53の充填を行うだけでよいため、簡単かつ確実に
除電機能付きのタイヤ11を製造することができる。そし
て、このようなタイヤ11は、車両に装着すると、該車両
と路面とが内側ゴム層21、導電体23を介して電気的に導
通するため、車両に溜った静電気がこれら内側ゴム層2
1、導電体23を通じて路面に逃げ、火花を伴った放電が
発生する事態を防止することができる。Next, a green case is formed by a forming drum (not shown), and a belt layer and the belt-like tread rubber 36 are pasted around a band drum (not shown) to form a band. The green rubber is attached to the outside of the green case so that the inner rubber body 32 is located radially inward of the outer rubber body 33 to form a green tire. Next, the raw tire is vulcanized by using a vulcanizing device (not shown). As a result, the inner and outer rubber bodies 32 and 33, the side rubbers 34 and 35, and the belt-shaped tread rubber 36 made of unvulcanized rubber are vulcanized, and the inner, outer rubber layers 21, 22 and the side rubber layer 24 of the vulcanized rubber are respectively obtained. , 25, tread rubber layer
The filler 53 made of unvulcanized rubber filled in the gap 52 is vulcanized to form the vulcanized rubber conductor 23. Here, when the filler 53 is provided intermittently in the circumferential direction at the cut 52 as described above, the open cut 52 between the fillers 53 is closed again at the time of this vulcanization and completely closed. Closed as in the original state. In this way, since it is only necessary to form the cut 52 and fill the gap 52 with the filler 53 during the normal tire manufacturing process, the tire 11 with the static elimination function can be easily and reliably manufactured. . When the tire 11 is mounted on a vehicle, the vehicle and the road surface are electrically connected to each other via the inner rubber layer 21 and the conductor 23.
1. It is possible to prevent a situation in which a discharge accompanied by a spark is generated by escaping to the road surface through the conductor 23.
【００１４】図７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、カッターに浅溝は形成
されておらず、また、良導電性ゴムが収納された収納槽
も設置されていないが、カッター55の直後に該カッター
55と一体となって帯状トレッドゴム36の長手方向に移動
する充填体56を設置している。ここで、この充填体56は
上下方向に延びた中空パイプからなり、その下端部はカ
ッター55によって形成された直後の切れ目57内に押し込
まれるとともに、上下方向に延びるスリット58を有して
いる。そして、この充填体56内に供給された未加硫の良
導電性ゴム59はカッター55によって形成された直後の切
れ目57に供給され、該切れ目57に充填物60として充填さ
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。FIG. 7 is a diagram showing a second embodiment of the present invention. In this embodiment, a shallow groove is not formed in the cutter, and a storage tank in which good conductive rubber is stored is not installed.
A filler 56 that moves in the longitudinal direction of the belt-like tread rubber 36 integrally with the filler 55 is provided. Here, the filling body 56 is formed of a hollow pipe extending in the vertical direction, and the lower end thereof is pushed into a cut 57 immediately after being formed by the cutter 55 and has a slit 58 extending in the vertical direction. Then, the unvulcanized good conductive rubber 59 supplied into the filler 56 is supplied to the cut 57 immediately after being formed by the cutter 55, and is filled as the filler 60 into the cut 57. Other configurations and operations are the same as those of the first embodiment.
【００１５】図８はこの発明の第３実施形態を示す図で
ある。この実施形態の空気入りタイヤ65は、ベルト層16
の半径方向外側に配置されたトレッドゴム層66全体を不
良導電性ゴムで構成するとともに、該トレッドゴム層66
内に、ベルト層16から外表面まで延びた良導電性ゴムか
らなる導電体67を設けることで、静電気を車両から路面
に逃がすようにしている。なお、他の構成は前記第１実
施形態と同様である。そして、このような空気入りタイ
ヤを製造するには、前述と同様に押出し機によって未加
硫の帯状トレッドゴムを押し出すが、このとき、口金に
形成された突起によって帯状トレッドゴムの外表面に長
手方向に延びる複数本の細溝を形成する。次に、前述と
同様の切断装置39のカッター（切断手段）45により帯状
トレッドゴムを細溝の溝底において長手方向に切断し、
該帯状トレッドゴムの外表面から内表面に至る、即ち厚
さ方向に貫通した切れ目を形成すると同時に、該切れ目
にカッター45の浅溝46および収納槽47から構成された充
填手段54を用いて未加硫のセメント状良導電性ゴムから
なる充填物を流し込み充填する。次に、グリーンケース
の外側に、ベルト層および前記帯状トレッドゴムから構
成されたバンドを貼付けて生タイヤを成形した後、該生
タイヤの加硫を行い、前記帯状トレッドゴムをトレッド
ゴム層66と、充填物を導電体67とする。なお、他は前記
第１実施形態の製造方法と同様である。FIG. 8 is a diagram showing a third embodiment of the present invention. The pneumatic tire 65 of this embodiment has a belt layer 16
The entirety of the tread rubber layer 66 disposed radially outward of the tread rubber layer 66 is made of defective conductive rubber.
By providing a conductor 67 made of a highly conductive rubber extending from the belt layer 16 to the outer surface, static electricity is released from the vehicle to the road surface. The other configuration is the same as that of the first embodiment. In order to manufacture such a pneumatic tire, an unvulcanized belt-shaped tread rubber is extruded by an extruder in the same manner as described above. A plurality of narrow grooves extending in the direction are formed. Next, the belt-shaped tread rubber is cut in the longitudinal direction at the bottom of the narrow groove by a cutter (cutting means) 45 of the same cutting device 39 as described above,
At the same time as forming a cut extending from the outer surface to the inner surface of the belt-shaped tread rubber, that is, penetrating in the thickness direction, using the filling means 54 constituted by the shallow groove 46 of the cutter 45 and the storage tank 47 at the cut. A filling made of vulcanized cement-like conductive rubber is poured and filled. Next, after forming a green tire by pasting a band composed of a belt layer and the band-shaped tread rubber on the outside of the green case, the green tire is vulcanized, and the band-shaped tread rubber is formed into a tread rubber layer 66. The filling material is the conductor 67. The rest is the same as the manufacturing method of the first embodiment.
【００１６】なお、前述の実施形態においては、円板状
カッター45を外側ゴム体33に押し付けながら帯状トレッ
ドゴム36の長手方向に移動させることで切れ目52を形成
するようにしたが、この発明においては、帯状トレッド
ゴムのみを長手方向に移動させることで、あるいは、円
板状カッター、帯状トレッドゴムの双方を帯状トレッド
ゴムの長手方向に移動させることで切れ目を形成するよ
うにしてもよい。また、前述の実施形態においてはカッ
ター45が円板状であったが、このカッターはナイフ状、
板刃状のものであってもよい。さらに、前述の実施形態
においては、導電体23を複数（２個）設けるようにした
が、この発明においては、トレッドセンターに１個だけ
設けるようにしてもよい。この場合には、口金の押出し
口の上端に１個の突起を設けて外側ゴム体の幅方向中央
に１本の細溝を形成するとともに、該細溝の溝底をカッ
ターにより切断して１本の切れ目を形成するようにすれ
ばよい。また、前述の導電体は３個以上の適宜個数であ
ってもよい。さらに、前述の実施形態においては、切断
手段としてカッター45を用いたが、この切断手段とし
て、光の強さを調節することで切れ目の深さを調節する
ことができるレーザー発振器を用いるようにしてもよ
い。In the above-described embodiment, the cut 52 is formed by moving the disc-shaped cutter 45 in the longitudinal direction of the belt-shaped tread rubber 36 while pressing the disc-shaped cutter 45 against the outer rubber body 33. The cut may be formed by moving only the band-shaped tread rubber in the longitudinal direction, or by moving both the disc-shaped cutter and the band-shaped tread rubber in the longitudinal direction of the band-shaped tread rubber. In the above-described embodiment, the cutter 45 has a disk shape.
It may be a plate blade. Furthermore, in the above-described embodiment, a plurality of (two) conductors 23 are provided, but in the present invention, only one conductor 23 may be provided in the tread center. In this case, one protrusion is provided at the upper end of the extrusion opening of the die to form one narrow groove at the center in the width direction of the outer rubber body, and the groove bottom of the narrow groove is cut by a cutter to obtain 1 groove. A book break may be formed. In addition, the above-described conductor may be an appropriate number of three or more. Further, in the above-described embodiment, the cutter 45 is used as the cutting means. However, as this cutting means, a laser oscillator capable of adjusting the depth of the cut by adjusting the intensity of light is used. Is also good.
【００１７】[0017]
【発明の効果】以上説明したように、この発明によれ
ば、除電機能付き空気入りタイヤを簡単かつ確実に製造
することができる。As described above, according to the present invention, a pneumatic tire with a static elimination function can be manufactured simply and reliably.
【図１】この発明の第１実施形態を示す除電機能付き空
気入りタイヤの子午線断面図である。FIG. 1 is a meridional section of a pneumatic tire with a static elimination function according to a first embodiment of the present invention.
【図２】帯状トレッドゴムを押し出す押出し機の口金の
正面図である。FIG. 2 is a front view of a die of an extruder for extruding a belt-shaped tread rubber.
【図３】押し出された帯状トレッドゴムの横断面図であ
る。FIG. 3 is a cross-sectional view of the extruded belt-shaped tread rubber.
【図４】切断装置の正面断面図である。FIG. 4 is a front sectional view of the cutting device.
【図５】図４のＩーＩ矢視断面図である。FIG. 5 is a sectional view taken along the line II of FIG. 4;
【図６】図５のIIーII矢視断面図である。6 is a sectional view taken along the line II-II in FIG.
【図７】この発明の第２実施形態を示す切断装置の側面
断面図である。FIG. 7 is a side sectional view of a cutting device according to a second embodiment of the present invention.
【図８】この発明の第３実施形態を示す除電機能付き空
気入りタイヤの子午線断面図である。FIG. 8 is a meridional sectional view of a pneumatic tire with a static elimination function according to a third embodiment of the present invention.
11、65…空気入りタイヤ 18、66…トレッドゴム層 21…内側ゴム層 22…外側ゴム層 23、67…導電体 31…口金 32…内側ゴム体 33…外側ゴム体 36…帯状トレッドゴム 37…突起 38…細溝 45…切断手段 52…切れ目 53…充填物 54…充填手段 11, 65 ... Pneumatic tire 18, 66 ... Tread rubber layer 21 ... Inner rubber layer 22 ... Outer rubber layer 23, 67 ... Conductor 31 ... Base 32 ... Inner rubber body 33 ... Outer rubber body 36 ... Strip tread rubber 37 ... Projection 38 ... Narrow groove 45 ... Cutting means 52 ... Cut 53 ... Filler 54 ... Filling means
Claims (9)
ッドゴム層を、半径方向内側に位置し良導電性ゴムから
なる内側ゴム層と半径方向外側に位置し不良導電性ゴム
からなる外側ゴム層とから構成するとともに、外側ゴム
層内に内側ゴム層から外側ゴム層の外表面まで延び良導
電性ゴムからなる導電体を設けることで静電気を車両か
ら路面に逃がすようにした除電機能付き空気入りタイヤ
の製造方法であって、未加硫ゴムからなる内側、外側ゴ
ム体を積層して構成した帯状トレッドゴムの外側ゴム体
を切断手段により長手方向に切断して外表面から内側ゴ
ム体に至る切れ目を形成するとともに、該切れ目に未加
硫の良導電性ゴムからなる充填物を充填する工程と、グ
リーンケースの外側にベルト層および前記帯状トレッド
ゴムを内側ゴム体が半径方向内側になるようにして貼付
けた後、加硫を行って前記帯状トレッドゴムをトレッド
ゴム層と、内側、外側ゴム体を内側、外側ゴム層と、充
填物を導電体とする工程とを備えたことを特徴とする除
電機能付き空気入りタイヤの製造方法。A tread rubber layer disposed radially outside of a belt layer comprises an inner rubber layer located radially inward and made of good conductive rubber and an outer rubber layer located radially outward and made of bad conductive rubber. Air with a static elimination function that allows static electricity to escape from the vehicle to the road surface by providing a conductor made of good conductive rubber that extends from the inner rubber layer to the outer surface of the outer rubber layer within the outer rubber layer. A method for manufacturing a tire containing a tire, wherein the outer rubber body of the belt-shaped tread rubber formed by laminating the inner and outer rubber bodies made of unvulcanized rubber is cut in a longitudinal direction by a cutting means to form the inner rubber body from the outer surface. A step of forming a notch and filling the cut with a filler made of an unvulcanized good conductive rubber; and providing a belt layer and the belt-shaped tread rubber on an inner rubber body outside a green case. After pasting so as to be radially inward, vulcanizing the belt-like tread rubber and the tread rubber layer, the inside, the outside rubber body inside, the outside rubber layer, and the step of using the filler as a conductor. A method for manufacturing a pneumatic tire with a static elimination function, comprising:
導電性ゴムからなるトレッドゴム層内に、ベルト層から
外表面まで延びた良導電性ゴムからなる導電体を設ける
ことで静電気を車両から路面に逃がすようにした除電機
能付き空気入りタイヤの製造方法であって、未加硫ゴム
からなる帯状トレッドゴムを切断手段により長手方向に
切断して外表面から内表面に至る切れ目を形成するとと
もに、該切れ目に未加硫の良導電性ゴムからなる充填物
を充填する工程と、グリーンケースの外側にベルト層お
よび前記帯状トレッドゴムを貼付けた後、加硫を行って
前記帯状トレッドゴムをトレッドゴム層と、充填物を導
電体とする工程とを備えたことを特徴とする除電機能付
き空気入りタイヤの製造方法。2. A vehicle according to claim 1, wherein a conductor made of a good conductive rubber extending from the belt layer to the outer surface is provided in a tread rubber layer made of a bad conductive rubber disposed radially outside of the belt layer. A pneumatic tire with a static elimination function that is made to escape from the road surface to form a cut from an outer surface to an inner surface by cutting a belt-like tread rubber made of unvulcanized rubber in a longitudinal direction by cutting means. Along with the step of filling a filler made of an unvulcanized good conductive rubber into the cut, and after attaching a belt layer and the belt-shaped tread rubber to the outside of the green case, vulcanizing is performed to remove the belt-shaped tread rubber. A method for producing a pneumatic tire with a static elimination function, comprising: a tread rubber layer; and a step of using a filler as a conductor.
溶かした充填物を流し込むことで充填するようにした請
求項１または２記載の除電機能付き空気入りタイヤの製
造方法。3. The method for manufacturing a pneumatic tire with a static elimination function according to claim 1, wherein the gap is filled by pouring a filler in which a good conductive rubber is dissolved in a cement form.
する際、口金に形成された突起によって外側ゴム体の外
表面に長手方向に延びる細溝を形成するとともに、該細
溝の溝底を前記切断手段により切断して内側ゴム体に至
る切れ目を形成するようにした請求項１記載の除電機能
付き空気入りタイヤの製造方法。4. When the belt-shaped tread rubber is formed by extrusion, a narrow groove extending in the longitudinal direction is formed on the outer surface of the outer rubber body by a projection formed on a die, and the groove bottom of the narrow groove is cut by the cutting. 2. The method for producing a pneumatic tire with a static elimination function according to claim 1, wherein the cut is formed by means to form a cut leading to the inner rubber body.
する際、口金に形成された突起によって帯状トレッドゴ
ムの外表面に長手方向に延びる細溝を形成するととも
に、該細溝の溝底を前記切断手段により切断して内表面
に至る切れ目を形成するようにした請求項２記載の除電
機能付き空気入りタイヤの製造方法。5. When the strip-shaped tread rubber is formed by extrusion, a narrow groove extending in the longitudinal direction is formed on the outer surface of the strip-shaped tread rubber by a projection formed on a die, and the groove bottom of the narrow groove is cut. 3. The method for producing a pneumatic tire with a static elimination function according to claim 2, wherein the cut is formed by means to form a cut reaching the inner surface.
ッドゴムの幅方向に延びる軸線を中心として回転する円
板状カッターを帯状トレッドゴムに押し付けながら帯状
トレッドゴムの長手方向に相対的に移動させることで行
うようにした請求項１または２記載の除電機能付き空気
入りタイヤの製造方法。6. The cutting of the belt-like tread rubber is performed by relatively moving the disk-like cutter rotating about an axis extending in the width direction of the belt-like tread rubber against the belt-like tread rubber in the longitudinal direction of the belt-like tread rubber. The method for producing a pneumatic tire with a static elimination function according to claim 1 or 2, wherein the method is performed.
ッドゴム層を、半径方向内側に位置し良導電性ゴムから
なる内側ゴム層と半径方向外側に位置し不良導電性ゴム
からなる外側ゴム層とから構成するとともに、外側ゴム
層内に内側ゴム層から外側ゴム層の外表面まで延び良導
電性ゴムからなる導電体を設けることで静電気を車両か
ら路面に逃がすようにした除電機能付き空気入りタイヤ
の製造装置であって、未加硫ゴムからなる内側、外側ゴ
ム体を積層して構成した帯状トレッドゴムの外側ゴム体
を長手方向に切断して外表面から内側ゴム体に至る切れ
目を形成する切断手段と、該切れ目に未加硫の良導電性
ゴムからなる充填物を充填する充填手段とを備え、前記
充填物が充填された帯状トレッドゴムを含む生タイヤを
加硫することで帯状トレッドゴムをトレッドゴム層と、
内側、外側ゴム体を内側、外側ゴム層と、充填物を導電
体とするようにしたことを特徴とする除電機能付き空気
入りタイヤの製造装置。7. A tread rubber layer disposed radially outside the belt layer, comprising: an inner rubber layer located on the inner side in the radial direction and made of a good conductive rubber; and an outer rubber layer located on the radially outer side and made of a bad conductive rubber. Air with a static elimination function that allows static electricity to escape from the vehicle to the road surface by providing a conductor made of good conductive rubber that extends from the inner rubber layer to the outer surface of the outer rubber layer within the outer rubber layer. An in-tired tire manufacturing apparatus, in which the outer rubber body of a belt-shaped tread rubber formed by laminating an inner rubber body and an outer rubber body made of unvulcanized rubber is cut in a longitudinal direction to cut a cut from the outer surface to the inner rubber body. A cutting means to be formed, and a filling means to fill a filling made of an unvulcanized good conductive rubber at the cut, by vulcanizing a green tire containing the band-shaped tread rubber filled with the filling. band And the tread rubber layer of the tread rubber,
An apparatus for manufacturing a pneumatic tire with a static elimination function, wherein the inner and outer rubber bodies are made of an inner and outer rubber layer, and the filler is made of a conductor.
導電性ゴムからなるトレッドゴム層内に、ベルト層から
外表面まで延びた良導電性ゴムからなる導電体を設ける
ことで静電気を車両から路面に逃がすようにした除電機
能付き空気入りタイヤの製造装置であって、未加硫ゴム
からなる帯状トレッドゴムを長手方向に切断して外表面
から内表面に至る切れ目を形成する切断手段と、該切れ
目に未加硫の良導電性ゴムからなる充填物を充填する充
填手段とを備え、前記充填物が充填された帯状トレッド
ゴムを含む生タイヤを加硫することで帯状トレッドゴム
をトレッドゴム層と、充填物を導電体とするようにした
ことを特徴とする除電機能付き空気入りタイヤの製造装
置。8. A vehicle in which static electricity is generated by providing a conductor made of good conductive rubber extending from the belt layer to the outer surface in a tread rubber layer made of defective conductive rubber disposed radially outside the belt layer. A pneumatic tire manufacturing apparatus with a static elimination function so as to escape from the road surface, cutting means for cutting a belt-shaped tread rubber made of unvulcanized rubber in the longitudinal direction to form a cut from the outer surface to the inner surface; Filling means for filling a filler made of unvulcanized good conductive rubber into the cut, and vulcanizing a green tire including the belt-like tread rubber filled with the filler to tread the belt-like tread rubber. An apparatus for manufacturing a pneumatic tire with a static elimination function, wherein a rubber layer and a filler are made of a conductor.
項７または８記載の除電機能付き空気入りタイヤの製造
装置。9. The apparatus for manufacturing a pneumatic tire with a static elimination function according to claim 7, wherein said cutting means comprises a cutter.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10016388A JPH1142719A (en) | 1997-05-26 | 1998-01-12 | Method and apparatus for producing pneumatic tire having static-eliminating function |
| EP98304149A EP0881060A3 (en) | 1997-05-26 | 1998-05-26 | Method and apparatus for the manufacture of pneumatic tyres having electric discharge means |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9-151512 | 1997-05-26 | ||
| JP15151297 | 1997-05-26 | ||
| JP10016388A JPH1142719A (en) | 1997-05-26 | 1998-01-12 | Method and apparatus for producing pneumatic tire having static-eliminating function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1142719A true JPH1142719A (en) | 1999-02-16 |
Family
ID=26352728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10016388A Withdrawn JPH1142719A (en) | 1997-05-26 | 1998-01-12 | Method and apparatus for producing pneumatic tire having static-eliminating function |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1142719A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001047525A (en) * | 1999-08-06 | 2001-02-20 | Bridgestone Corp | Apparatus and method for manufacture of tire |
| KR100318042B1 (en) * | 1999-11-08 | 2001-12-24 | 조충환 | A Conductible Rubber Planting Device For Tire Tread And A Tire Thereby |
| JP2002504454A (en) * | 1998-02-26 | 2002-02-12 | コンパニー ゼネラール デ エタブリッスマン ミシュラン−ミシュラン エ コムパニー | Extruder for conductive tire and section with conductive insert |
| JP2007153092A (en) * | 2005-12-02 | 2007-06-21 | Sumitomo Rubber Ind Ltd | Pneumatic tire and method for manufacturing the pneumatic tire |
| JP2020108935A (en) * | 2019-01-07 | 2020-07-16 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Tread rubber manufacturing method and pneumatic tire |
-
1998
- 1998-01-12 JP JP10016388A patent/JPH1142719A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002504454A (en) * | 1998-02-26 | 2002-02-12 | コンパニー ゼネラール デ エタブリッスマン ミシュラン−ミシュラン エ コムパニー | Extruder for conductive tire and section with conductive insert |
| JP2001047525A (en) * | 1999-08-06 | 2001-02-20 | Bridgestone Corp | Apparatus and method for manufacture of tire |
| KR100318042B1 (en) * | 1999-11-08 | 2001-12-24 | 조충환 | A Conductible Rubber Planting Device For Tire Tread And A Tire Thereby |
| JP2007153092A (en) * | 2005-12-02 | 2007-06-21 | Sumitomo Rubber Ind Ltd | Pneumatic tire and method for manufacturing the pneumatic tire |
| JP2020108935A (en) * | 2019-01-07 | 2020-07-16 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Tread rubber manufacturing method and pneumatic tire |
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