JP2000225653A5 - - Google Patents
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- Publication number
- JP2000225653A5 JP2000225653A5 JP1999028762A JP2876299A JP2000225653A5 JP 2000225653 A5 JP2000225653 A5 JP 2000225653A5 JP 1999028762 A JP1999028762 A JP 1999028762A JP 2876299 A JP2876299 A JP 2876299A JP 2000225653 A5 JP2000225653 A5 JP 2000225653A5
- Authority
- JP
- Japan
- Prior art keywords
- ply
- carcass
- carcass band
- bead
- bead core
- 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.)
- Granted
Links
- 239000011324 bead Substances 0.000 description 12
- 230000002093 peripheral Effects 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000004804 winding Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
- 210000003932 Urinary Bladder Anatomy 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Description
ところが、このような従来のビード部構造にあっては、カーカスプライ５２の巻返し外端位置を境として、タイヤ半径方向の内外側に剛性段差を生じることになるので、タイヤの負荷転動に際する、ビード部からサイドウォール部にかけての繰返しの撓み変形および周方向剪断変形によって、前記巻返し外端およびその近傍に応力が集中することになり、これがため、その外端の、ゴム質からのセパレーションが発生し易く、このセパレーションが、図１１（ｂ）に示すようなビード部クラックｃｒの原因になるという問題があった。 However, in such a conventional bead portion structure, a rigidity step is generated on the inner and outer sides in the radial direction of the tire with the position of the outer end of the rewinding of the carcass ply 52 as a boundary. Due to the repeated bending deformation and circumferential shear deformation from the bead portion to the sidewall portion, stress is concentrated on the outer end of the unwinding and its vicinity, and therefore, from the rubbery material of the outer end. There is a problem that the separation is likely to occur, and this separation causes a crack cr in the bead portion as shown in FIG. 11 (b).
しかるに、カーカスプライ巻返し部分の、ビードコア周面へのこのような巻付けを、たとえば、周知のブラダ、羽根、ロール等を用いて、プライコード、ひいては、カーカスプライに、前記巻付け方向の弾性変形を行わせることと、弾性変形させた巻返し部分をビードコア周面にゴム粘着させることとによって行う場合には、プライコードをビードコア周面に、所期した通りの高い精度で巻付けることが困難であり、しかも、弾性復元力の小さいプライコードはともかくとして、スチールコード、芳香族ポリアミドコード等のような弾性復元力の大きいプライコードについては、それを所要の巻付け位置に正確に維持することができず、結局は、プライコードの引抜けおよびカーカスプライ巻返し端のセパレーションのそれぞれを十分に防止することができないという問題があった。 However, such winding of the carcass ply rewinding portion on the peripheral surface of the bead core is performed by using, for example, a well-known bladder, blade, roll, etc., on the ply cord, and thus on the carcass ply, the elasticity in the winding direction. When the deformation is performed and the elastically deformed rewinding portion is rubber-adhered to the peripheral surface of the bead core, the ply cord can be wound around the peripheral surface of the bead core with the desired high accuracy. Aside from ply cords that are difficult and have low elastic resilience, for ply cords with high elastic resilience such as steel cords, aromatic polyamide cords, etc., keep them exactly in the required winding position. In the end, there was a problem that the pull-out of the ply cord and the separation of the rewinding end of the carcass ply could not be sufficiently prevented.
この発明は、上述のような問題点に鑑みてなされたものであり、その目的とするところは、弾性復元力の大きなプライコードを用いる場合にあってなお、カーカスプライの巻返し部分を、ビードコアの周面に所期した通りに正確に巻付けるとともに、その巻付け姿勢を確実に維持することができる空気入りタイヤの製造方法ならびに、それに用いるカーカスバンド折曲げ装置およびタイヤ製造装置を提供するにある。 The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a bead core for the rewound portion of the carcass ply even when a ply cord having a large elastic restoring force is used. with precisely wound attached as was expected on the peripheral surface of the pneumatic tire manufacturing method in which the Ru can maintain its winding posture reliably and provides a carcass band folding apparatus and a tire manufacturing apparatus used therefor It is in.
【０００８】
【課題を解決するための手段】
この発明の空気入りタイヤの製造方法は、生タイヤを成型するに当り、円筒状カーカスバンドの各端部分を、軸線方向の少なくとも一個所で、その全周にわたって半径方向内側もしくは外側に折曲げてくせ付けするとともに、その折曲げ端部分の内側にリング状のビードコアを配設し、その後、ビードコアをロックしつつ、円筒状カーカスバンドをトロイダルに膨らませてその外周側にベルトおよびトレッドを接合させるものである。
0008
[Means for solving problems]
In the method for manufacturing a pneumatic tire of the present invention, when molding a raw tire, each end portion of the cylindrical carcass band is bent inward or outward in the radial direction at at least one position in the axial direction over the entire circumference thereof. A ring-shaped bead core is arranged inside the bent end portion while being habituated, and then, while locking the bead core, a cylindrical carcass band is inflated toroidally and a belt and a tread are joined to the outer peripheral side thereof. Is.
この発明の、空気入りタイヤの製造に用いるカーカスバンド折曲げ装置は、円筒状カーカスバンドの端部分をその内周側もしくは外周側から支持する環状溝付きの軸状部材を設けるとともに、環状溝と対応して位置し、円筒状カーカスバンドを環状溝に押込む円板状部材を設けたものである。 Of the invention, the carcass band bending apparatus used in the manufacture of a pneumatic tire is provided with a shaft-shaped member with an annular groove for supporting an end portion of the cylindrical carcass band from the inner circumferential side or outer circumferential side, and the annular groove It is provided with a disc-shaped member that is located correspondingly and pushes the cylindrical carcass band into the annular groove.
【００２３】
【発明の実施の形態】
以下にこの発明の実施の形態を図面に示すところに基づいて説明する。
図１はこの発明に係るタイヤ製造装置の実施形態を示す略線平面図である。
図中１はモータを示し、２は、モータ１の出力軸に取付けたカーカスバンドドラムを示す。このカーカスバンドドラム２は、後に述べるシェーピング手段を付設してなり、主には、サービサ３から供給されるインナライナ、カーカスプライ等のタイヤ構成部材をその周面上に積層巻回すべく機能する。
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic plan view showing an embodiment of a tire manufacturing apparatus according to the present invention.
In the figure, 1 indicates a motor, and 2 indicates a carcass band drum attached to the output shaft of the motor 1. The carcass band drum 2 is made by attaching a shaping means to be described later, mainly, the inner liner supplied from the servicer 3, functions to turn laminated wind the tire component members such as a carcass ply on the peripheral surface thereof.
なおここでは、ベルト・トレッドバンドドラム（以下「ＢＴドラム」という。）４をもまたモータ出力軸に取付け、このＢＴドラム４で、サービサ５から供給されるベルトおよびトレッドを順次に積層巻回する。 Note here, the belt-tread band drum (hereinafter referred to as "BT drum".) 4 also mounted on the motor output shaft, in this BT drum 4, sequentially stacked winding the belt and tread supplied from serviceability 5 To do.
その後は、図１に示す一対のビードセッタ７を、図５（ｃ）に示すように、そのビードホルダ２２にリング状のビードコア２３を、たとえば磁気吸着した状態で、カーカスバンドドラム２、ひいては、円筒状カーカスバンド１８の中央部分まで変位させ、そこで、円筒状カーカスバンド１８のそれぞれの端部分の所定位置を、カーカスバンド折曲げ装置８の軸状部材１６と円板状部材１７との間に所要の力で挟み込み、折曲げ装置８の、前述したような作用の下で、円筒状カーカスバンド１８にその全周にわたる所要の折曲げ加工を施す。 After that, as shown in FIG. 5 (c), the pair of bead setters 7 shown in FIG. 1 are magnetically attracted to the bead holder 22 with the ring-shaped bead core 23, for example, the carcass band drum 2 and thus the cylindrical shape. The carcass band 18 is displaced to the central portion, where a predetermined position of each end portion of the cylindrical carcass band 18 is required between the shaft-shaped member 16 and the disc-shaped member 17 of the carcass band bending device 8. It is sandwiched by force, and the cylindrical carcass band 18 is subjected to the required bending process over the entire circumference under the action of the bending device 8 as described above.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02876299A JP4187858B2 (en) | 1999-02-05 | 1999-02-05 | Pneumatic tire manufacturing method, carcass band bending apparatus and tire manufacturing apparatus used therefor |
| EP00300607A EP1024033B1 (en) | 1999-01-28 | 2000-01-27 | Pneumatic tires |
| ES00300607T ES2242578T3 (en) | 1999-01-28 | 2000-01-27 | PNEUMATIC COVER. |
| DE60020418T DE60020418T2 (en) | 1999-01-28 | 2000-01-27 | tire |
| US09/493,116 US6530411B1 (en) | 1999-01-28 | 2000-01-28 | Pneumatic tires |
| US10/254,554 US6688360B2 (en) | 1999-01-28 | 2002-09-26 | Pneumatic tires |
| US10/694,907 US7152645B2 (en) | 1999-01-28 | 2003-10-29 | Pneumatic tires |
| US11/594,761 US7879170B2 (en) | 1999-01-28 | 2006-11-09 | Pneumatic tires |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02876299A JP4187858B2 (en) | 1999-02-05 | 1999-02-05 | Pneumatic tire manufacturing method, carcass band bending apparatus and tire manufacturing apparatus used therefor |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2000225653A JP2000225653A (en) | 2000-08-15 |
| JP2000225653A5 true JP2000225653A5 (en) | 2006-01-26 |
| JP4187858B2 JP4187858B2 (en) | 2008-11-26 |
Family
ID=12257431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02876299A Expired - Fee Related JP4187858B2 (en) | 1999-01-28 | 1999-02-05 | Pneumatic tire manufacturing method, carcass band bending apparatus and tire manufacturing apparatus used therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4187858B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6491079B2 (en) | 2000-01-14 | 2002-12-10 | Bridgestone Corporation | Pneumatic tire with turnup portion wrapped along outer peripheral face of bead core |
| JP4785290B2 (en) * | 2001-07-30 | 2011-10-05 | 株式会社ブリヂストン | Bead with stiffener |
| JP4612300B2 (en) * | 2003-12-25 | 2011-01-12 | 住友ゴム工業株式会社 | Carcass cord winding method, molding device, and pneumatic tire manufacturing method |
| JP4518883B2 (en) * | 2004-09-08 | 2010-08-04 | 株式会社ブリヂストン | Pneumatic tire manufacturing apparatus and manufacturing method |
| US20100000661A1 (en) * | 2006-11-20 | 2010-01-07 | Bridgestone Corporation | Method of producing a green tire, device for turning a carcass band used therefor and apparatus for producing a green tire |
| JP2010052205A (en) * | 2008-08-27 | 2010-03-11 | Bridgestone Corp | Method for manufacturing pneumatic tire, and pneumatic tire |
| JP5679716B2 (en) * | 2010-07-13 | 2015-03-04 | 株式会社ブリヂストン | Tire manufacturing method |
| JP5623889B2 (en) * | 2010-12-07 | 2014-11-12 | 株式会社ブリヂストン | Pneumatic tire manufacturing method |
-
1999
- 1999-02-05 JP JP02876299A patent/JP4187858B2/en not_active Expired - Fee Related
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