JP2010269505A - Method of manufacturing annular member - Google Patents

Method of manufacturing annular member Download PDF

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Publication number
JP2010269505A
JP2010269505A JP2009122706A JP2009122706A JP2010269505A JP 2010269505 A JP2010269505 A JP 2010269505A JP 2009122706 A JP2009122706 A JP 2009122706A JP 2009122706 A JP2009122706 A JP 2009122706A JP 2010269505 A JP2010269505 A JP 2010269505A
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Prior art keywords
annular
rubber body
outer peripheral
support plate
rubber
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JP2009122706A
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Japanese (ja)
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Yuichiro Ogawa
裕一郎 小川
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Bridgestone Corp
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Bridgestone Corp
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Priority to JP2009122706A priority Critical patent/JP2010269505A/en
Priority to PCT/JP2010/058204 priority patent/WO2010134475A1/en
Publication of JP2010269505A publication Critical patent/JP2010269505A/en
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    • 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)
    • B29D30/48—Bead-rings or bead-cores; Treatment thereof prior to building the tyre
    • 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)
    • B29D30/48—Bead-rings or bead-cores; Treatment thereof prior to building the tyre
    • B29D2030/482—Applying fillers or apexes to bead cores

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tyre Moulding (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing an annular member that suppresses variance of mutual positional relation between an annular substrate and an annular rubber body while a bonding power of the annular substrate and the annular rubber body is maintained high. <P>SOLUTION: The method of manufacturing the annular member includes: a substrate arranging process in which the annular substrate 11 is positioned and arranged on the inner peripheral end side of a first supporting disc 21; a first forming process in which a first rubber body 12a is formed annular by laminating a ribbon-shaped rubber material that is continuous over the outer peripheral face of the annular substrate 11 and the disc face 21f of the first supporting disc 21; an inverting process in which the bonded annular substrate 11 and the first rubber body 12a are inverted on a second supporting disc 22; and a second forming process in which the second rubber body 12b is formed annular by laminating a ribbon-shaped rubber material continuous from the outer peripheral face of the inverted annular substrate 11 over the disc face of the second supporting disc through the first rubber body 12a. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、環状の基体および環状のゴム体が一体化された環状部材の製造方法に関し、該環状部材は、例えばタイヤに使用されるビードコアおよびスティフナが一体化されたビードコア組立体である。   The present invention relates to a method of manufacturing an annular member in which an annular base body and an annular rubber body are integrated. The annular member is a bead core assembly in which, for example, a bead core and a stiffener used in a tire are integrated.

ビードコアの外周に未加硫のリボン状ゴム材を巻回し積層してスティフナを成形して該ビードコア組立体が、製造される方法が既に開示されている。
本願出願人は、このビードコアとスティフナとの結合力を向上させたビードコア組立体の製造方法について、先に提案している（特許文献１参照）。 A method has already been disclosed in which a bead core assembly is manufactured by winding and laminating an unvulcanized ribbon-shaped rubber material around the bead core to form a stiffener.
The applicant of the present application has previously proposed a method for manufacturing a bead core assembly in which the bonding force between the bead core and the stiffener is improved (see Patent Document 1).

特開２００７−７６２３３号公報JP 2007-76233 A

該特許文献１には、回転する中空円板状の支持ディスクにリボン状ゴム材を連続的に押し出して積層して所定箇所に第１ゴム体を成形しておき、次いで拡径した支持リムに支持された断面六角形をし６面を有する環状ビードコアが中心軸を一致させて軸方向に移動してビードコアの外周側の１面を第１ゴム体に押付け付着し一体に結合し、次にビードコアの外周側の残りの２面と第１ゴム体とに亘ってリボン状ゴム材を積層して第２ゴム体を成形し、最後に第２ゴム体と支持ディスクに亘ってリボン状ゴム材を積層して第３ゴム体を成形して、第１，第２，第３ゴム体がスティフナを構成することで、ビードコア組立体を製造する方法が開示されている。   In Patent Document 1, a ribbon-shaped rubber material is continuously extruded and laminated on a rotating hollow disk-shaped support disk to form a first rubber body at a predetermined location, and then the diameter of the expanded support rim is increased. An annular bead core having a hexagonal cross section supported and having six faces moves in the axial direction with the center axis aligned, and presses and attaches one face on the outer peripheral side of the bead core to the first rubber body, and then bonds together. A second rubber body is formed by laminating a ribbon-shaped rubber material over the remaining two surfaces on the outer peripheral side of the bead core and the first rubber body, and finally a ribbon-shaped rubber material is formed over the second rubber body and the support disk. A method of manufacturing a bead core assembly is disclosed in which a third rubber body is formed by laminating layers and the first, second, and third rubber bodies form a stiffener.

予め支持ディスク上に成形された第１ゴム体にビードコアの外周側の１面を押付け、ビードコアの外周側の残りの２面と第１ゴム体とに亘って第２ゴム体が成形されるので、ビードコアの外周３面にスティフナが付着し、結合力を向上させている。   Since one surface on the outer peripheral side of the bead core is pressed against the first rubber body previously formed on the support disk, the second rubber body is formed across the remaining two surfaces on the outer peripheral side of the bead core and the first rubber body. The stiffener is attached to the three outer peripheral surfaces of the bead core to improve the bonding force.

しかし、支持ディスク上に成形された第１ゴム体にビードコアの外周側の１面を押付ける工程が開示されており、その際に第１ゴム体の形状によって、その上に押付けられるビードコアの配置位置に影響して結合するビードコアとスティフナの相互位置関係にバラつきが生じる場合があり、更なる改良が望まれていた。   However, a process of pressing one outer peripheral surface of the bead core against the first rubber body formed on the support disk is disclosed, and the arrangement of the bead core pressed onto the first rubber body according to the shape of the first rubber body at that time is disclosed. In some cases, the positional relationship between the bead core and the stiffener that are joined by affecting the position may vary, and further improvement has been desired.

本発明は、かかる点に鑑みなされたもので、その目的とする処は、環状基体と環状ゴム体の結合力を高く維持しながら、環状基体と環状ゴム体の相互位置関係のバラつきを抑えた環状部材の製造方法を供する点にある。   The present invention has been made in view of such a point, and the object of the present invention is to suppress variation in the mutual positional relationship between the annular base body and the annular rubber body while maintaining a high bonding force between the annular base body and the annular rubber body. It is in the point which provides the manufacturing method of an annular member.

上記目的を達成するために、請求項１記載の発明は、環状基体および環状ゴム体が一体化された環状部材の製造方法において、前記環状基体を第１支持盤の内周端部側に位置決め配置する基体配置工程と、前記環状基体の外周面と前記第１支持盤の盤面とに亘って連続するリボン状ゴム材を積層して第１ゴム体を環状に成形する第１成形工程と、結合した前記環状基体と前記第１ゴム体を前記筒状支持部材とともに第２支持盤に反転する反転工程と、反転した前記環状基体の外周面から前記第１ゴム体を介して前記第２支持盤の盤面に亘って連続するリボン状ゴム材を積層して第２ゴム体を環状に成形する第２成形工程と、を備える環状部材の製造方法とした。   To achieve the above object, according to a first aspect of the present invention, in the method of manufacturing an annular member in which an annular base and an annular rubber body are integrated, the annular base is positioned on the inner peripheral end side of the first support plate. A base placement step for placement, a first molding step for annularly shaping the first rubber body by laminating a continuous ribbon-like rubber material across the outer peripheral surface of the annular base and the surface of the first support plate, A reversing step of reversing the combined annular base body and the first rubber body together with the cylindrical support member to a second support plate, and the second support from the outer peripheral surface of the reversed annular base body via the first rubber body. A second molding step of laminating a ribbon-like rubber material continuous over the board surface of the board and molding the second rubber body into an annular shape.

請求項２記載の発明は、請求項１記載の環状部材の製造方法において、前記環状基体は断面が五角形以上の多角形をなし、前記第１成形工程では、前記環状基体の外周側の２以上の外周面と前記第１支持盤の盤面とに亘って第１ゴム体を成形し、前記第２成形工程では、前記環状基体の外周側の１以上の外周面から前記第１ゴム体を介して前記第２支持盤の盤面に亘って第２ゴム体を成形することを特徴とする。   According to a second aspect of the present invention, in the method of manufacturing an annular member according to the first aspect, the annular base body has a polygonal shape with a cross section of a pentagon or more. In the first molding step, two or more outer peripheral sides of the annular base body The first rubber body is molded over the outer peripheral surface of the first support plate and the disk surface of the first support plate, and in the second molding step, the one or more outer peripheral surfaces on the outer peripheral side of the annular base member are interposed via the first rubber body. The second rubber body is molded over the surface of the second support plate.

請求項３記載の発明は、請求項１または請求項２記載の環状部材の製造方法において、前記第１ゴム体が前記第２ゴム体より硬質のゴム材からなることを特徴とする。   According to a third aspect of the present invention, in the method for manufacturing an annular member according to the first or second aspect, the first rubber body is made of a harder rubber material than the second rubber body.

請求項４記載の発明は、請求項１から請求項３までのいずれか１項記載の環状部材の製造方法において、前記第１支持盤の盤面が径方向内側にテーパした内周テーパ面を形成し、前記第２支持盤の盤面が径方向外側にテーパした外周テーパ面を形成していることを特徴とする。   According to a fourth aspect of the present invention, in the method of manufacturing an annular member according to any one of the first to third aspects, the inner peripheral tapered surface is formed such that the surface of the first support plate is tapered radially inward. And the board surface of the said 2nd support board forms the outer peripheral taper surface which tapered on the radial direction outer side.

請求項１記載の環状部材の製造方法によれば、基体配置工程で第１支持盤の内周端部側に位置決め配置した環状基体の外周面に、第１成形工程でリボン状ゴム材を積層して第１ゴム体を環状に成形するので、環状基体の配置位置がずれることはなく、環状基体と環状ゴム体の相対位置関係のバラつきを防止することができる。   According to the manufacturing method of the annular member according to claim 1, the ribbon-like rubber material is laminated in the first molding step on the outer peripheral surface of the annular substrate positioned and arranged on the inner peripheral end side of the first support plate in the substrate arranging step. Then, since the first rubber body is formed into an annular shape, the arrangement position of the annular base body is not shifted, and variations in the relative positional relationship between the annular base body and the annular rubber body can be prevented.

第１成形工程で環状基体の外周面と第１支持盤の盤面とに亘って成形された第１ゴム体は、反転工程で反転すると、第１支持盤の盤面で形成された平坦な面が外に向き、その平坦面上に第２成形工程で第２ゴム体が積層して成形されるので、第１ゴム体と第２ゴム体の界面がエアを含まない良好な接合状態をなして高い接合力を期待できる。 When the first rubber body molded across the outer peripheral surface of the annular base body and the board surface of the first support disk in the first molding process is reversed in the reversing process, the flat surface formed by the board surface of the first support board is Since the second rubber body is laminated and molded on the flat surface in the second molding step, the interface between the first rubber body and the second rubber body has a good joined state that does not contain air. High bonding strength can be expected.

さらに、第１成形工程で環状基体の外周面に第１ゴム体を成形し、第２成形工程で反転した環状基体の残りの外周面に第２ゴム体を成形するので、環状基体の外周側の殆どの外周面に環状ゴム体が付着成形され、環状基体と環状ゴム体の結合力を高く維持することができる。   Further, the first rubber body is molded on the outer peripheral surface of the annular base body in the first molding step, and the second rubber body is molded on the remaining outer peripheral surface of the annular base body reversed in the second molding step. An annular rubber body is attached and molded to almost the outer peripheral surface of the substrate, and the bonding force between the annular base body and the annular rubber body can be kept high.

請求項２記載の環状部材の製造方法によれば、第１成形工程で断面が五角形以上の多角形の環状基体の外周側の２以上の外周面に第１ゴム体を成形して付着し、第２成形工程で反転した環状基体の外周側の残りの１以上の外周面に第２ゴム体を成形して付着するので、環状基体の外周側の３以上の外周面に環状ゴム体が付着され、環状基体と環状ゴム体の結合力をより高く維持することができる。   According to the method for manufacturing the annular member according to claim 2, the first rubber body is molded and attached to the outer peripheral surfaces of the outer peripheral side of the polygonal annular base having a cross section of a pentagon or more in the first molding step, Since the second rubber body is molded and attached to the remaining one or more outer peripheral surfaces of the outer peripheral side of the annular base reversed in the second molding step, the annular rubber body is attached to three or more outer peripheral surfaces on the outer peripheral side of the annular base. Thus, the bonding strength between the annular base and the annular rubber body can be maintained higher.

請求項３記載の環状部材の製造方法によれば、第１ゴム体が第２ゴム体より硬質のゴム材からなるので、第１ゴム体のより硬い平坦面上により軟らかい第２ゴム体が形成されるので、第１ゴム体と第２ゴム体が益々良好な接合状態をなしてより一層高い接合力を期待できる。   According to the method for manufacturing the annular member according to claim 3, since the first rubber body is made of a harder rubber material than the second rubber body, the softer second rubber body is formed on the harder flat surface of the first rubber body. As a result, the first rubber body and the second rubber body can be expected to have a higher bonding force with an even better bonding state.

請求項４記載の環状部材の製造方法によれば、第１支持盤の盤面が径方向内側にテーパした内周テーパ面を形成し、第２支持盤の盤面が径方向外側にテーパした外周テーパ面を形成しているので、第１支持盤の内周テーパ面上で成形された第１ゴム体を、第２支持盤の外周テーパ面上に反転配置したとき、第１ゴム体は成形された形状そのままで第２支持盤の外周テーパ面に沿って配置されて変形することなく形状が維持され、第２成形工程で第１ゴム体の上に第２ゴム体を精度良く成形することができる。   According to the manufacturing method of the annular member according to claim 4, the outer peripheral taper in which the disk surface of the first support board forms an inner peripheral taper surface taper radially inward and the disk surface of the second support disk tapers radially outward. Since the surface is formed, when the first rubber body molded on the inner peripheral tapered surface of the first support plate is reversed and disposed on the outer peripheral tapered surface of the second support plate, the first rubber body is molded. The shape is maintained without being deformed by being arranged along the outer peripheral tapered surface of the second support plate as it is, and the second rubber body can be accurately molded on the first rubber body in the second molding step. it can.

本発明の第１実施形態である製造方法により製造されたビードコア組立体を備える空気入りタイヤの断面図である。It is sectional drawing of a pneumatic tire provided with the bead core assembly manufactured by the manufacturing method which is 1st Embodiment of this invention. 本ビードコア組立体の製造装置の概略断面図である。It is a schematic sectional drawing of the manufacturing apparatus of this bead core assembly. 同製造装置の分解断面図である。It is an exploded sectional view of the manufacturing device. 同製造装置で本ビードコア組立体の製造工程を説明するため経時的に各状態を順次図示した要部断面図である。FIG. 4 is a cross-sectional view of a principal part sequentially illustrating each state over time in order to explain a manufacturing process of the bead core assembly in the manufacturing apparatus.

以下、本発明に係る一実施の形態について図１ないし図４に基づいて説明する。
図１を参照すると、ゴムを主体に形成された空気入りタイヤ１は、本発明が適用された製造方法により製造された環状部材であるビードコア組立体10（図２，図３参照）が加硫工程で加硫されて形成されたビードコア11およびスティフナ12を備える。 Hereinafter, an embodiment according to the present invention will be described with reference to FIGS.
Referring to FIG. 1, a pneumatic tire 1 mainly composed of rubber is vulcanized by a bead core assembly 10 (see FIGS. 2 and 3), which is an annular member manufactured by a manufacturing method to which the present invention is applied. A bead core 11 and a stiffener 12 formed by vulcanization in the process are provided.

タイヤ１は、ホイールのリム８に嵌合する１対のビード部２と、路面に接触するトレッド部３と、各ビード部２からタイヤ１の径方向外方に延びてトレッド部３に連なる１対のサイドウォール部４とを備える。
トロイド状のカーカス５は、トレッド部３およびサイドウォール部４を経て、ビードコア11およびスティフナ12の周囲を内側から外側へと折り返して径方向外方に巻き上げるように設けられる。 The tire 1 includes a pair of bead portions 2 that are fitted to a rim 8 of a wheel, a tread portion 3 that is in contact with a road surface, and extends from the bead portions 2 outward in the radial direction of the tire 1 to be connected to the tread portion 3. And a pair of sidewall portions 4.
The toroidal carcass 5 is provided so as to wrap around the bead core 11 and the stiffener 12 from the inside to the outside through the tread portion 3 and the sidewall portion 4 and to wind up radially outward.

タイヤ１をリム８に固定する円環状のビードコア11およびゴムからなる円環状のスティフナ12は、密着して一体化した状態で、カーカス５の折返し部５ａに囲まれてビード部２内に埋設されている。
ビードコア11の横断面形状は、この実施形態では六角形であるが、四角形以上の多角形であればよく、五角形以上のビードコアを用いた部材製法に好適である。 An annular bead core 11 for fixing the tire 1 to the rim 8 and an annular stiffener 12 made of rubber are embedded in the bead portion 2 surrounded by the turn-up portion 5a of the carcass 5 in a tightly integrated state. ing.
The cross-sectional shape of the bead core 11 is a hexagonal shape in this embodiment, but it may be a polygon more than a quadrangle, and is suitable for a member manufacturing method using a bead core more than a pentagon.

以下、ビードコア組立体10の製造方法について説明する。
図２は、ビードコア組立体10の製造装置Ｐの概略断面図であり、図３は、その分解図である。
ビードコア11を支持する円筒状のチャック20、第１ゴム体12ａを成形する第１支持盤21、第２ゴム体12ｂを成形する第２支持盤22が、回転中心軸Ｌを同軸にして組み付けられる。 Hereinafter, a method for manufacturing the bead core assembly 10 will be described.
2 is a schematic cross-sectional view of the manufacturing apparatus P for the bead core assembly 10, and FIG. 3 is an exploded view thereof.
A cylindrical chuck 20 for supporting the bead core 11, a first support plate 21 for forming the first rubber body 12a, and a second support plate 22 for forming the second rubber body 12b are assembled with the rotation center axis L as the same axis. .

円筒状のチャック20は、周方向に分割された複数の弧状の可動片20ｈを備え、該可動片20ｈは径方向に移動可能で、全可動片20ｈが同心円（円筒）を構成して一斉に径方向に移動することで円筒の径を拡大縮小することができる。
なお、チャック20はアクチュエータにより駆動されるが、手動によるものでもよく、また、他のチャック機構のものでもビードコアを内側から支持できればよい。 The cylindrical chuck 20 includes a plurality of arc-shaped movable pieces 20h divided in the circumferential direction. The movable pieces 20h are movable in the radial direction, and all the movable pieces 20h constitute a concentric circle (cylindrical). The diameter of the cylinder can be enlarged or reduced by moving in the radial direction.
Although the chuck 20 is driven by an actuator, it may be manually operated, or any other chuck mechanism may be used as long as it can support the bead core from the inside.

したがって、チャック20は、円環状のビードコア11の内側で円筒を縮径した状態から拡径することで、ビードコア11を内側から固定支持することができる。
断面が六角形をしたビードコア11を複数の可動片20ｈが所定位置で内側から支持すると、図３に示すように、円環状をしたビードコア11の外周側に外周面ａ，ｂ，ｃの３面が向く。 Accordingly, the chuck 20 can fix and support the bead core 11 from the inside by increasing the diameter from the state where the diameter of the cylinder is reduced inside the annular bead core 11.
When the plurality of movable pieces 20h support the bead core 11 having a hexagonal cross section at a predetermined position from the inside, as shown in FIG. 3, three surfaces of outer peripheral surfaces a, b and c are formed on the outer peripheral side of the annular bead core 11. Is suitable.

第１支持盤21は、円環状をなし、その中空円孔21ｃの内径がビードコア11の内径（ビードコア11を支持したチャック20の円筒の外径）に略等しく、第１ゴム体12ａを成形する盤面がすり鉢状をして径方向内側にテーパした内周テーパ面21ｆを形成している。   The first support plate 21 has an annular shape, and the inner diameter of the hollow circular hole 21c is substantially equal to the inner diameter of the bead core 11 (the outer diameter of the cylinder of the chuck 20 that supports the bead core 11), and forms the first rubber body 12a. The board surface has a mortar shape and forms an inner peripheral tapered surface 21f that is tapered radially inward.

第２支持盤22は、円板状をなし、中央に内径がビードコア11の内径（ビードコア11を支持したチャック20の円筒の外径）に等しい底の浅い円穴22ｃが形成され、その外周に第２ゴム体12ｂを成型する盤面が径方向外側にテーパした外周テーパ面22ｆを形成している。
第２支持盤22は、外周テーパ面22ｆを上に向けた水平姿勢で、基台25より上方に突出する回転中心軸Ｌ上の回転軸26の上端に嵌着し、図示されない電動モータにより回転軸26が回転し、回転軸26と一体の第２支持盤22も回転中心軸Ｌを中心に回転する。 The second support plate 22 has a disc shape, and a shallow circular hole 22c having an inner diameter equal to the inner diameter of the bead core 11 (the outer diameter of the cylinder of the chuck 20 supporting the bead core 11) is formed in the center, and the outer periphery thereof is formed on the outer periphery. A disk surface on which the second rubber body 12b is molded forms an outer peripheral tapered surface 22f tapered outward in the radial direction.
The second support plate 22 is fitted in the upper end of the rotation shaft 26 on the rotation center axis L projecting upward from the base 25 in a horizontal posture with the outer peripheral tapered surface 22f facing upward, and is rotated by an electric motor (not shown). The shaft 26 rotates, and the second support plate 22 integrated with the rotation shaft 26 also rotates about the rotation center axis L.

以上のチャック20および第１支持盤21が第２支持盤22に組み付けられた状態を図２に示す。
ビードコア11を内側から固定支持したチャック20が、内周テーパ面21ｆを上に向けた第１支持盤21の円孔21ｃに上方から嵌入し、第２支持盤22の上に第１支持盤21を重ねるようにして第１支持盤21を貫通したチャック20の下端部が第２支持盤22の円穴22ｃに嵌合して、図２に示すように組み付けられている。 FIG. 2 shows a state where the chuck 20 and the first support plate 21 are assembled to the second support plate 22.
A chuck 20 that fixedly supports the bead core 11 from the inside is fitted from above into a circular hole 21c of the first support plate 21 with the inner peripheral tapered surface 21f facing upward, and the first support plate 21 is placed on the second support plate 22. As shown in FIG. 2, the lower end portion of the chuck 20 penetrating the first support plate 21 is fitted into the circular hole 22c of the second support plate 22 so as to overlap each other.

組み付けられたチャック20と第１支持盤21と第２支持盤22は、一体に回転するが、チャック20に対して第１支持盤21と第２支持盤22はともに着脱可能である。
図２は、第１成形工程を示しており、第１支持盤21の内周テーパ面21ｆの上方まで側方から支持アーム31が回転中心軸Ｌに向かって延びており、支持アーム31の先端にヘッド部32が揺動可能に吊設されたゴム材供給装置30が図示されている。 The assembled chuck 20, the first support plate 21, and the second support plate 22 rotate integrally, but both the first support plate 21 and the second support plate 22 can be attached to and detached from the chuck 20.
FIG. 2 shows a first molding step, in which the support arm 31 extends from the side toward the rotation center axis L to above the inner peripheral tapered surface 21 f of the first support plate 21, and the tip of the support arm 31. A rubber material supply device 30 is shown in which the head portion 32 is suspended so as to be swingable.

図示されないアクチェータにより支持アーム31は径方向および上下方向に移動可能であり、下方に吊設されたヘッド部32は下端のゴム材出口を径方向にアクチュエータ（図示せず）により揺動することができる。   The support arm 31 can be moved in the radial direction and the vertical direction by an actuator (not shown), and the head part 32 suspended below can swing the rubber material outlet at the lower end in the radial direction by an actuator (not shown). it can.

ゴム材供給装置30におけるヘッド部32には、図示されないが押出機から延出した導管が連結されており、押出機から押し出されたゴム材が導管を通ってヘッド部32からリボン状ゴム材Ｒとして連続的に押し出される。   Although not shown, a conduit extending from the extruder is connected to the head portion 32 of the rubber material supply device 30, and the rubber material extruded from the extruder passes through the conduit from the head portion 32 to the ribbon-shaped rubber material R. As a continuous extrusion.

ゴム材供給装置30は、２台用意されており、互いに硬度が異なるゴム材が押し出される。
後記する第１成形工程では、より硬質のゴム材が使用され、第２成形工程では、より軟質のゴム材が使用される。
リボン状ゴム材Ｒの断面形状は、三角形から十角形の多角形、真円や楕円などを含む円形状などのいずれの形状であってもよい。 Two rubber material supply devices 30 are prepared, and rubber materials having different hardnesses are extruded.
In the first molding step described later, a harder rubber material is used, and in the second molding step, a softer rubber material is used.
The cross-sectional shape of the ribbon-shaped rubber material R may be any shape such as a triangle to a decagonal polygon, or a circular shape including a perfect circle or an ellipse.

回転する第１支持盤21の内周テーパ面21ｆに、ゴム材供給装置30により上方のヘッド部32からリボン状ゴム材Ｒが連続的に押し出されるので、ビードコア11の外周面と内周テーパ面21ｆとに亘って連続するリボン状ゴム材Ｒを上下方向に積層しながら径方向に拡張して成形ゴム体を形成することができる。   Since the ribbon-shaped rubber material R is continuously pushed out from the upper head portion 32 by the rubber material supply device 30 onto the inner peripheral tapered surface 21f of the rotating first support plate 21, the outer peripheral surface of the bead core 11 and the inner peripheral tapered surface It is possible to form a molded rubber body by extending the radial direction while laminating the ribbon-shaped rubber material R extending over 21f in the vertical direction.

以下、本ビードコア組立体10を製造する工程を図４に従って説明する。
まず、ビードコア11を、チャック20の所定位置に内側から固定支持された状態で、第１支持盤21の内周端部側に位置決め配置するビードコア配置工程を図４（１）に示す。
ビードコア11は、第１支持盤21の内周テーパ面21ｆの最小内径部に位置して外周面ｃが内周テーパ面21ｆに略沿っていて、その他の外周面ａ，ｂの２外周面が外方に向いている。 Hereinafter, the process of manufacturing the bead core assembly 10 will be described with reference to FIG.
First, FIG. 4A shows a bead core arrangement process in which the bead core 11 is positioned and arranged on the inner peripheral end side of the first support board 21 in a state where the bead core 11 is fixedly supported at a predetermined position of the chuck 20 from the inside.
The bead core 11 is positioned at the minimum inner diameter portion of the inner peripheral tapered surface 21f of the first support plate 21, the outer peripheral surface c is substantially along the inner peripheral tapered surface 21f, and the other outer peripheral surfaces a and b are two outer peripheral surfaces. Looking outwards.

この状態で、前記図２に示すように、第１支持盤21をチャック20とともに回転し、より硬質のゴム材を押し出すゴム材供給装置30によりビードコア11の外周面ａ，ｂと第１支持盤21の内周テーパ面21ｆとに亘って連続するリボン状ゴム材Ｒを積層してより硬質のゴム材からなる第１ゴム体12ａを環状に成形する（第１成形工程）。   In this state, as shown in FIG. 2, the outer peripheral surfaces a and b of the bead core 11 and the first support plate are rotated by the rubber material supply device 30 that rotates the first support plate 21 together with the chuck 20 and pushes out a harder rubber material. The first rubber body 12a made of a harder rubber material is formed into a ring shape by laminating a continuous ribbon-shaped rubber material R over the inner peripheral tapered surface 21f of the 21 (first molding step).

図４（２）は、第１成形工程の直後の状態を示しており、第１ゴム体12ａはビードコア11の外周面ａ，ｂに内周端部を付着して第１支持盤21の内周テーパ面21ｆに沿って外周に成形され、外周に行く程肉厚を薄くして外周端部を先細に形成している。
したがって、第１ゴム体12ａの断面は、上下のテーパ面を略２等辺とする２等辺三角形状をなす。 FIG. 4 (2) shows a state immediately after the first molding step, and the first rubber body 12 a is attached to the outer peripheral surfaces a and b of the bead core 11 with the inner peripheral end portions inside the first support plate 21. The outer peripheral end is formed along the peripheral taper surface 21f, and the outer peripheral end portion is tapered by decreasing the thickness toward the outer periphery.
Accordingly, the cross section of the first rubber body 12a has an isosceles triangle shape with the upper and lower tapered surfaces being approximately isosceles.

次に、チャック20と第１支持盤21をビードコア11，第１ゴム体12ａとともに、第２支持盤22から上方に取り外し、上下を反転し、図４（３）に示すように、チャック20の下端を第２支持盤22の円穴22ｃに嵌合して第２支持盤22に取り付ける（反転工程）。 Next, the chuck 20 and the first support plate 21 are removed together with the bead core 11 and the first rubber body 12a from the second support plate 22 and turned upside down. As shown in FIG. The lower end is fitted into the circular hole 22c of the second support plate 22 and attached to the second support plate 22 (reversing step).

そして、第１支持盤21をチャック20から取り外した状態を、図４（４）に示す。
ビードコア11の外周側の１外周面ｃが外方に向いており、第１ゴム体12ａの下側となったテーパ面が第２支持盤22の外周テーパ面22ｆに接し、上側となったテーパ面は先の第１成形工程で第１支持盤21の内周テーパ面21ｆにより形成された滑らかな平坦面をなす。 And the state which removed the 1st support disk 21 from the chuck | zipper 20 is shown in FIG. 4 (4).
One outer peripheral surface c on the outer peripheral side of the bead core 11 faces outward, and the taper surface on the lower side of the first rubber body 12a is in contact with the outer peripheral taper surface 22f of the second support plate 22, and the taper on the upper side. The surface forms a smooth flat surface formed by the inner peripheral tapered surface 21f of the first support plate 21 in the first molding step.

この状態で、第２支持盤22をチャック20とともに回転し、より軟質のゴム材を押し出すゴム材供給装置30によりビードコア11の外周面ｃから第１ゴム体12ａの上側テーパ面を介して第２支持盤22の外周テーパ面22ｆに亘って連続するリボン状ゴム材Ｒを積層してより軟質のゴム材からなる第２ゴム体12ｂを環状に成形する（第２成形工程）。
この第２成形工程におけるゴム材供給装置30から供給されるリボン状ゴム材Ｒは、前記第１成形工程において供給されるゴム材とは異なり、より軟質のゴム材が使用されている。 In this state, the second support plate 22 is rotated together with the chuck 20 to push the soft rubber material from the outer peripheral surface c of the bead core 11 through the upper tapered surface of the first rubber body 12a by the second rubber material supply device 30. A second rubber body 12b made of a softer rubber material is formed into an annular shape by laminating a continuous ribbon-shaped rubber material R over the outer peripheral tapered surface 22f of the support board 22 (second forming step).
Unlike the rubber material supplied in the first molding step, the rubber-like rubber material R supplied from the rubber material supply device 30 in the second molding step uses a softer rubber material.

図４（５）は、第２成形工程の直後の状態を示しており、第２ゴム体12ｂはビードコア11の外周面ｃに内周端部を付着し、第１ゴム体12ａの平坦な上側テーパ面上に積層し接着し、さらに第２支持盤22の外周テーパ面22ｆに沿って外周に成形され、外周に行く程肉厚を薄くして外周端部を先細に形成している。   FIG. 4 (5) shows a state immediately after the second molding step. The second rubber body 12b has an inner peripheral end attached to the outer peripheral surface c of the bead core 11, and the flat upper side of the first rubber body 12a. It is laminated on the taper surface and bonded, and is formed on the outer periphery along the outer peripheral taper surface 22f of the second support board 22, and the outer peripheral end portion is tapered by decreasing the thickness toward the outer periphery.

第１ゴム体12ａの上側テーパ面のより硬い平坦面上により軟らかい第２ゴム体12ｂが形成されるので、第１ゴム体12ａと第２ゴム体12ｂが良好な接合状態をなしてより高い接合力で接合されてスティフナ12が形成される。   Since the softer second rubber body 12b is formed on the harder flat surface of the upper taper surface of the first rubber body 12a, the first rubber body 12a and the second rubber body 12b are in a good bonded state and higher bonded. The stiffeners 12 are formed by joining with force.

第１ゴム体12ａと第２ゴム体12ｂが接合され一体に形成されたスティフナ12は、ビードコア11の３つの外周面ａ，ｂ，ｃに内周端部を付着して第２支持盤22の外周テーパ面22ｆに沿って外周に成形され、スティフナ12の断面は、上下のテーパ面を略２等辺とする２等辺三角形状をなす。   The stiffener 12 integrally formed by joining the first rubber body 12a and the second rubber body 12b is attached to the three outer peripheral surfaces a, b, and c of the bead core 11 with the inner peripheral end portions attached thereto. The stiffener 12 is formed on the outer periphery along the outer peripheral tapered surface 22f, and the cross section of the stiffener 12 has an isosceles triangle shape with the upper and lower tapered surfaces being approximately isosceles.

こうして、ビードコア11にスティフナ12が一体に結合されたビードコア組立体10が製造される。
ビードコア組立体10はチャック20に保持された状態で、第２支持盤22から取り外されて（図４（６）参照）、ビードコア組立体10の製造工程を完了する。 In this way, the bead core assembly 10 in which the stiffener 12 is integrally coupled to the bead core 11 is manufactured.
The bead core assembly 10 is removed from the second support plate 22 while being held by the chuck 20 (see FIG. 4 (6)), and the manufacturing process of the bead core assembly 10 is completed.

ビードコア配置工程で、チャック20の所定位置に内側から固定支持されたビードコア11が第１支持盤21の内周端部に位置決め配置され、このビードコア11の外周面ａ，ｂに、第１成形工程でリボン状ゴム材Ｒを積層して第１ゴム体12ａを環状に成形するので、ビードコア11の配置位置がずれることはなく、ビードコア11と第１ゴム体12ａ（およびスティフナ12）との相対位置関係のバラつきを防止することができる。   In the bead core arranging step, the bead core 11 fixed and supported from the inside at a predetermined position of the chuck 20 is positioned and arranged on the inner peripheral end portion of the first support board 21, and the first molding step is performed on the outer peripheral surfaces a and b of the bead core 11. Since the first rubber body 12a is formed into an annular shape by laminating the ribbon-shaped rubber material R, the position of the bead core 11 is not displaced, and the relative position between the bead core 11 and the first rubber body 12a (and the stiffener 12). It is possible to prevent variations in the relationship.

第１成形工程でビードコア11の外周面と第１支持盤21の内周テーパ面21ｆとに亘って成形された第１ゴム体12ａは、反転工程で反転すると、内周テーパ面21ｆで形成された平坦なテーパ面が外に向き、その平坦テーパ面上に第２成形工程で第２ゴム体12ｂが積層して成形されるので、第１ゴム体12ａと第２ゴム体12ｂの界面がエアを含まない良好な接合状態をなして高い接合力を示す。   The first rubber body 12a formed over the outer peripheral surface of the bead core 11 and the inner peripheral tapered surface 21f of the first support plate 21 in the first forming step is formed by the inner peripheral tapered surface 21f when inverted in the inversion step. Since the second rubber body 12b is laminated and molded on the flat taper surface in the second molding step, the interface between the first rubber body 12a and the second rubber body 12b is air. It shows a high bonding force with a good bonding state that does not contain.

さらに、第１ゴム体12ａが第２ゴム体12ｂより硬質のゴム材からなるので、第１ゴム体12ａのより硬い平坦テーパ面上により軟らかい第２ゴム体12ｂが形成されるので、第１ゴム体12ａと第２ゴム体12ｂが益々良好な接合状態をなしてより一層高い接合力が期待できる。   Further, since the first rubber body 12a is made of a harder rubber material than the second rubber body 12b, the softer second rubber body 12b is formed on the harder flat tapered surface of the first rubber body 12a. The body 12a and the second rubber body 12b are in a better bonding state, and a higher bonding force can be expected.

また、第１成形工程で断面が六角形のビードコア11の外周側の２外周面ａ，ｂに第１ゴム体12ａを成形して付着し、第２成形工程で反転したビードコア11の外周側の残りの１外周面ｃに第２ゴム体12ｂを成形して付着するので、ビードコア11の外周側の３外周面ａ，ｂ，ｃにスティフナ12が付着され、ビードコア11とスティフナ12の結合力をより高く維持することができる。   In addition, the first rubber body 12a is molded and attached to the two outer peripheral surfaces a and b on the outer peripheral side of the bead core 11 having a hexagonal cross section in the first molding step, and the outer peripheral side of the bead core 11 reversed in the second molding step. Since the second rubber body 12b is molded and attached to the remaining one outer peripheral surface c, the stiffener 12 is attached to the three outer peripheral surfaces a, b, c on the outer peripheral side of the bead core 11, and the coupling force between the bead core 11 and the stiffener 12 is increased. Can be kept higher.

第１支持盤21の盤面が内側にテーパした内周テーパ面21ｆを形成し、第２支持盤22の盤面が外側にテーパした外周テーパ面22ｆを形成しているので、第１支持盤21の内周テーパ面21ｆ上で成形された第１ゴム体12ａを、第２支持盤22の外周テーパ面22ｆ上に反転配置したとき、第１ゴム体12ａは成形された形状そのままで第２支持盤22の外周テーパ面22ｆに沿って配置されて変形することなく形状が維持され、第２成形工程で第１ゴム体12ａの上に第２ゴム体12ｂを精度良く成形することができる。   Since the surface of the first support plate 21 forms an inner peripheral taper surface 21f tapered inward, and the surface of the second support plate 22 forms an outer peripheral taper surface 22f tapered outward, the first support plate 21 When the first rubber body 12a molded on the inner peripheral taper surface 21f is reversed and disposed on the outer peripheral taper surface 22f of the second support disk 22, the first rubber body 12a remains in the molded shape as it is. The second rubber body 12b can be accurately molded on the first rubber body 12a in the second molding step by being arranged along the outer peripheral tapered surface 22f of 22 and maintaining its shape without deformation.

なお、本製造装置Ｐにおいては、第１成形盤21が、回転駆動機構を備える第２成形盤22に組み合わせて使用するものであったが、第１成形盤21は第２成形盤22とは別個に単独で回転駆動機構を備えてもよい。   In this manufacturing apparatus P, the first molding machine 21 is used in combination with the second molding machine 22 having a rotation drive mechanism. However, the first molding machine 21 is different from the second molding machine 22. You may provide a rotation drive mechanism separately independently.

１…空気入りタイヤ、２…ビード部、３…トレッド部、４…サイドウォール部、５…カーカス、８…リム、
10…ビードコア組立体、11…ビードコア、12…スティフナ、12ａ…第１ゴム体、12ｂ…第２ゴム体、
Ｐ…製造装置、20…チャック、20ｈ…可動片、21…第１支持盤、21ｆ…内周テーパ面、22…第２支持盤、22ｆ…外周テーパ面、25…基台、26…回転軸、
30…ゴム材供給装置、31…支持アーム、32…ヘッド部。 DESCRIPTION OF SYMBOLS 1 ... Pneumatic tire, 2 ... Bead part, 3 ... Tread part, 4 ... Side wall part, 5 ... Carcass, 8 ... Rim,
10 ... Bead core assembly, 11 ... Bead core, 12 ... Stiffener, 12a ... First rubber body, 12b ... Second rubber body,
P ... Manufacturing apparatus, 20 ... Chuck, 20h ... Movable piece, 21 ... First support plate, 21f ... Inner peripheral taper surface, 22 ... Second support plate, 22f ... Outer peripheral taper surface, 25 ... Base, 26 ... Rotating shaft ,
30 ... Rubber material supply device, 31 ... Support arm, 32 ... Head part.

Claims (4)

環状基体および環状ゴム体が一体化された環状部材の製造方法において、
前記環状基体を第１支持盤の内周端部側に位置決め配置する基体配置工程と、
前記環状基体の外周面と前記第１支持盤の盤面とに亘って連続するリボン状ゴム材を積層して第１ゴム体を環状に成形する第１成形工程と、
結合した前記環状基体と前記第１ゴム体を前記筒状支持部材とともに第２支持盤に反転する反転工程と、
反転した前記環状基体の外周面から前記第１ゴム体を介して前記第２支持盤の盤面に亘って連続するリボン状ゴム材を積層して第２ゴム体を環状に成形する第２成形工程と、
を備えることを特徴とする環状部材の製造方法。 In the manufacturing method of the annular member in which the annular base body and the annular rubber body are integrated,
A base body arranging step of positioning and arranging the annular base body on the inner peripheral end side of the first support plate;
A first molding step of laminating a continuous ribbon-shaped rubber material over the outer peripheral surface of the annular base and the disk surface of the first support plate to form the first rubber body in an annular shape;
A reversing step of reversing the combined annular base and the first rubber body together with the cylindrical support member to a second support plate;
A second molding step of forming a second rubber body in an annular shape by laminating a continuous ribbon-shaped rubber material from the inverted outer peripheral surface of the annular base body through the first rubber body to the surface of the second support plate. When,
The manufacturing method of the annular member characterized by comprising. 前記環状基体は断面が五角形以上の多角形をなし、
前記第１成形工程では、前記環状基体の外周側の２以上の外周面と前記第１支持盤の盤面とに亘って第１ゴム体を成形し、
前記第２成形工程では、前記環状基体の外周側の１以上の外周面から前記第１ゴム体を介して前記第２支持盤の盤面に亘って第２ゴム体を成形することを特徴とする請求項１記載の環状部材の製造方法。 The annular substrate has a polygonal shape with a pentagon or more in cross section,
In the first molding step, a first rubber body is molded across two or more outer peripheral surfaces on the outer peripheral side of the annular base body and a disk surface of the first support plate,
In the second molding step, the second rubber body is molded from one or more outer peripheral surfaces on the outer peripheral side of the annular base body to the surface of the second support plate via the first rubber body. The manufacturing method of the annular member of Claim 1. 前記第１ゴム体が前記第２ゴム体より硬質のゴム材からなることを特徴とする請求項１または請求項２記載の環状部材の製造方法。   The method for manufacturing an annular member according to claim 1 or 2, wherein the first rubber body is made of a rubber material harder than the second rubber body. 前記第１支持盤の盤面が径方向内側にテーパした内周テーパ面を形成し、
前記第２支持盤の盤面が径方向外側にテーパした外周テーパ面を形成していることを特徴とする請求項１から請求項３までのいずれか１項記載の環状部材の製造方法。 The board surface of the first support board forms an inner circumferential tapered surface tapered inward in the radial direction,
The method of manufacturing an annular member according to any one of claims 1 to 3, wherein the surface of the second support plate forms an outer peripheral tapered surface tapered outward in the radial direction.
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WO2013065102A1 (en) * 2011-10-31 2013-05-10 東洋ゴム工業株式会社 Method for molding annular member and apparatus for molding annular member
JP2015013403A (en) * 2013-07-04 2015-01-22 株式会社ブリヂストン Molding device and molding method of bead filler
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JP4589065B2 (en) * 2004-09-10 2010-12-01 東洋ゴム工業株式会社 Method and apparatus for forming annular member for tire
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JP5108406B2 (en) * 2007-07-19 2012-12-26 株式会社ブリヂストン Stiffener formation method

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WO2013065102A1 (en) * 2011-10-31 2013-05-10 東洋ゴム工業株式会社 Method for molding annular member and apparatus for molding annular member
US20140252673A1 (en) * 2011-10-31 2014-09-11 Toyo Tire & Rubber Co., Ltd. Method for molding annular member and apparatus for molding annular member
US9694552B2 (en) 2011-10-31 2017-07-04 Toyo Tire & Rubber Co., Ltd. Method for molding annular member and apparatus for molding annular member
JP2015013403A (en) * 2013-07-04 2015-01-22 株式会社ブリヂストン Molding device and molding method of bead filler
US10625482B2 (en) 2015-12-07 2020-04-21 Toyo Tire Corporation Method of manufacturing bead member

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