JP2007001126A - Bead core setting device and setting method - Google Patents

Bead core setting device and setting method Download PDF

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JP2007001126A
JP2007001126A JP2005183377A JP2005183377A JP2007001126A JP 2007001126 A JP2007001126 A JP 2007001126A JP 2005183377 A JP2005183377 A JP 2005183377A JP 2005183377 A JP2005183377 A JP 2005183377A JP 2007001126 A JP2007001126 A JP 2007001126A
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bead
winding
bead core
carcass band
axial direction
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Shinya Yamamoto
信也 山本
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Bridgestone Corp
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Bridgestone Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To always surely and properly make a bead core remain inside the winding/rotating part of a carcass band. <P>SOLUTION: The annular bead core 5 is set inside each winding/rotating part 3 of the carcass band 2 having the winding/rotating part 3 which is formed cylindrically and bent in a hook shape in the mutually facing direction on the peripheral side of both end parts in the axial direction. A projection having a top P inside in the radial direction from the end edge E of the winding/rotating part 3 when the carcass band 2 is displaced outside in the axial direction is installed on the outer surface 6 of the carcass band 2 of a pair of bead holders 1 which hold the bead core 5, are displaced outside in the axial direction and outward in the radial direction of the carcass band 2, and make the held bead core 5 remain inside the winding/rotating part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、円筒形をなすカーカスバンドの両端部分に形成されて、相互に向き合う方向に鈎上に折れ曲がるそれぞれの巻き回し部の内側への、円環状のビードコアの適正なるセットを確実にするビードコアのセット装置および、それを用いたセット方法にある。   The present invention provides a bead core which is formed at both ends of a carcass band having a cylindrical shape and ensures an appropriate set of annular bead cores inside respective winding portions which are bent on the ridges in mutually facing directions. And a setting method using the same.

円筒状のカーカスバンドの、両端部分の外周側に形成した巻き回し部の内側への、円環状のビードコアのセット技術としては、出願人の提案に係る特開２０２−３２１２８９号公報に開示されたものがある。   As a technique for setting an annular bead core on the inner side of a wound portion formed on the outer peripheral side of both end portions of a cylindrical carcass band, Japanese Patent Application Laid-Open No. 202-321289 related to the applicant's proposal disclosed There is something.

この提案技術では、図４（ａ）に軸線方向断面図で示すように、図示しないサーバから成型ドラム１１１上へ供給されたカーカス素材を、そこで円筒状に形成してカーカスバンド１１２とするとともに、そのカーカスバンド１１２に、カーカス素材への予めのくせ付け加工に基いて、軸線方向の両端部分に位置して相互に向き合う方向に鈎状に折り曲がる巻き回し部１１３を設けたところにおいて、はじめは、図４（ｂ）に示すように、たとえば、スティフナ１１４を予め貼着させたそれぞれのビードコア１１５を、それぞれのビードホルダ１１６の相互の対向面に、磁気吸着等によって同心に保持した状態で、カーカスバンド１１２のそれぞれの端部側から、図に仮想線で示すように、そのカーカスバンド１１２の両巻き回し部１１３に間まで変位させる。   In this proposed technique, as shown in the sectional view in the axial direction in FIG. 4A, a carcass material supplied from a server (not shown) onto the forming drum 111 is formed into a cylindrical shape to form a carcass band 112. The carcass band 112 is provided with winding portions 113 which are located at both end portions in the axial direction and bent in a hook shape in a direction facing each other on the basis of the pre-bonding process to the carcass material. As shown in FIG. 4B, for example, each bead core 115 to which a stiffener 114 is attached in advance is held concentrically on the mutually facing surfaces of each bead holder 116 by magnetic adsorption or the like. From each end side of the band 112, as shown by the phantom line in the figure, between the winding portions 113 of the carcass band 112, In to displace.

なおこの場合、それぞれのビードホルダ１１６の先端内径を、図示のように、カーカスバンド１１２の巻き回し部１１３の外径より小さく設定したときは、ビードコア１１５を上述したように変位させるに当って、ビードホルダ１１６の先端が、巻き回し部１１３を押し潰す方向に弾性変形させることになる。   In this case, when the inner diameter of the tip of each bead holder 116 is set smaller than the outer diameter of the winding portion 113 of the carcass band 112 as shown in the drawing, the bead holder 115 is displaced when the bead core 115 is displaced as described above. The tip of 116 is elastically deformed in the direction of crushing the winding portion 113.

次いで、同図（ｃ）に示すように、それぞれのビードホルダ１１６を相互に離隔する方向に水平変位させることで、それらの先端部分で、巻き回し部１１３の、図４（ｄ）に示すような弾性的な押し広げ変形をもたらす。
この場合、ビードホルダ１１６の先端内径の、巻き回し部外径に対する予めの選択により、ビードホルダ１１６の先端の、巻き回し部１１３に対する掛合量が少なすぎるとき、または、その掛合が全く行われないときには、図４（ｃ）に仮想線で示すように、ビードホルダ１１６の先端を縮径方向に変位させることで十分な掛合量を確保する。 Next, as shown in FIG. 4C, the bead holders 116 are horizontally displaced in the direction of separating from each other, so that the winding portion 113 of the winding portion 113 is shown in FIG. It causes elastic spreading deformation.
In this case, when the engagement amount of the tip end of the bead holder 116 with respect to the winding portion 113 is too small due to the prior selection of the inner diameter of the tip end of the bead holder 116 with respect to the outer diameter of the winding portion, or when the engagement is not performed at all. As shown by the phantom line in FIG. 4C, a sufficient amount of engagement is secured by displacing the tip of the bead holder 116 in the direction of diameter reduction.

その後は、成型ドラム１１１のビードロック１１７を、図４（ｄ）に仮想線で示すように変位させて、ビードコア１１５をロック状態とし、続いて、それぞれのビードホルダ１１６を半径方向外方へ退避変位させて、ビードホルダ１１６の、巻き回し部１１３からの離隔をもたらすことで、図４（ｅ）に示すように、ビードコア１１５を、弾性復帰した巻き回し部１１３の内側に残留させてそこにセットすることとしている。
特開２００２−３２１２８９号公報 Thereafter, the bead lock 117 of the molding drum 111 is displaced as indicated by the phantom line in FIG. 4D to place the bead core 115 in a locked state, and then each bead holder 116 is retracted and displaced outward in the radial direction. By causing the bead holder 116 to be separated from the winding portion 113, the bead core 115 remains inside the winding portion 113 that has been elastically restored and set therein as shown in FIG. 4 (e). I am going to do that.
JP 2002-321289 A

しかるに、この従来技術にあっては、ビードホルダ１１６の、横断面形状が四角形をなすそれぞれのフィンガ部材の、カーカスバンド１１２の軸線方向の外側に向く表面を垂直平坦面としていることから、そのビードホルダ１１６の先端で、ほぼ鈎状をなす巻き回し部１１３を押し広げ変形させるに当り、その巻き回し部１１３の端部分が、図４（ｃ）に実線で示すように、ビードホルダ１１６の垂直平坦面にほぼ直角に当接した後、ビードホルダ１１６の水平変位の進行に伴って、巻き回し部端部分が、図５（ａ）に示すように、半径方向の内方側へ縮径変形するおそれがあり、この結果として、ビードホルダ１１６の退避変位によって、ビードコア１１５が、図５（ｂ）に示すように、巻き回し部１１３の外側にセットされることになるという問題があった。   However, in this prior art, since the surface of each finger member of the bead holder 116 facing the outside in the axial direction of the carcass band 112 of each finger member having a square cross-sectional shape is a vertical flat surface, the bead holder 116 is provided. As shown in FIG. 4C, the end portion of the winding portion 113 is placed on the vertical flat surface of the bead holder 116 when the winding portion 113 having a substantially bowl shape is pushed and deformed at the tip of the bead. After the contact at a substantially right angle, as the horizontal displacement of the bead holder 116 progresses, the end portion of the winding portion may be reduced in diameter toward the inner side in the radial direction as shown in FIG. As a result, the bead core 115 is set outside the winding portion 113 as shown in FIG. There has been a problem to say.

この一方で、巻き回し部１１３の弾性的な押し広げ変形が行なわれた場合にあっても、巻き回し部１１３の構成各部の変形の態様によっては、図６（ａ）に示すように、巻き回し部１１３の基部外面が、内周側部材としてのビードロック１１７の表面に早期に接触することがあり、これがため、ビードホルダ１１６が相互の離隔限界位置まで変位してなお、巻き回し部１１３、とくにはそれの端部分の、半径方向外方向への拡径量が不足し、その結果として、弾性的に拡径変形させた巻き回し部１１３の、残留ビードコア１１５への適正なる巻き付けが困難となり、巻き回し部１１３内に残留させたビードコア１１５の、横断面内でのそれの角部が、図６（ｂ）に示すように、巻き回し部１１３の折曲部とうまく整合し得えなくなることがあるという問題があった。   On the other hand, depending on the deformation mode of each part of the winding portion 113, even when the elastic spreading and deformation of the winding portion 113 is performed, as shown in FIG. The outer surface of the base of the turning portion 113 may come into early contact with the surface of the bead lock 117 as the inner peripheral member. Therefore, the bead holder 116 is displaced to the mutual separation limit position, and the winding portion 113, In particular, the end portion thereof is insufficiently expanded in the radially outward direction, and as a result, it is difficult to properly wind the wound portion 113 elastically expanded and deformed around the residual bead core 115. The corner portion of the bead core 115 left in the winding portion 113 in the cross section cannot be well aligned with the bent portion of the winding portion 113 as shown in FIG. Thing There is a problem in that.

この発明は、従来技術が抱えるこのような問題点を解決することを課題としてなされたものであり、それの目的とするところは、円環状のビードコアを、カーカスバンドの巻き回し部の内側へ、常に確実に、かつ適正に残留させることができるビードコアのセット装置およびセット方法を提供するにある。   The present invention was made to solve such problems of the prior art, the purpose of which is to place an annular bead core inside the winding portion of the carcass band, It is an object of the present invention to provide a bead core setting device and a setting method that can always reliably and properly remain.

この発明に係るビードコアのセット装置は、円筒状に形成されて、軸線方向の両端部分の外周側に、相互に向き合う方向に鈎状に折れ曲がる巻き回し部を有するカーカスバンドの、各巻き回し部の内側に円環状のビードコアをセットするものであり、ビードコアを内面側に保持して、カーカスバンドの軸線方向外側に水平変位して、好ましくは、各巻き回し部を弾性的に押し広げ変形させるとともに、カーカスバンドの半径方向外方に変位して、保持したビードコアを巻き回し部の内側に残留させる一対のビードホルダの、カーカスバンドの軸線方向外側の表面、すなわち外面に、カーカスバンドの軸線方向外側への変位に際して、巻き回し部の端縁より半径方向の内方に頂をもつ、側面視で直線および曲線の少なくとも一方からなる凸部を設けたものである。   The bead core setting device according to the present invention is formed in a cylindrical shape, and on the outer peripheral side of both end portions in the axial direction, each of the winding portions of the carcass band having winding portions that bend in a hook shape in a direction facing each other. An annular bead core is set on the inner side, the bead core is held on the inner surface side, and is horizontally displaced outward in the axial direction of the carcass band. Preferably, each winding part is elastically expanded and deformed. The pair of bead holders that are displaced radially outward of the carcass band and remain inside the wound portion of the pair of bead cores, on the outer surface in the axial direction of the carcass band, that is, on the outer surface, outward in the axial direction of the carcass band In the case of displacement, a convex portion having at least one of a straight line and a curved line in a side view, having a vertex inward in the radial direction from the edge of the winding portion. Those digits.

ここで好ましくは、凸部を、巻き回し部の端縁の外径より半径方向の外方まで連続させて形成し、また好ましくは、凸部を、ビードホルダの半径方向内端位置から０〜３０ｍｍの範囲内に形成する。
なおここにおいて、ビードホルダの、カーカスバンドの半径方向外方への変位量は、３０ｍｍ以下とすることが好ましい。 Preferably, the convex portion is formed continuously from the outer diameter of the edge of the winding portion to the outer side in the radial direction, and preferably, the convex portion is 0 to 30 mm from the radial inner end position of the bead holder. Form within the range.
Here, the amount of displacement of the bead holder in the radially outward direction of the carcass band is preferably 30 mm or less.

また、この発明に係るビードコアのセット方法は、一対のビードホルダで相互の対向面側、すなわち内面側に保持した円環状のそれぞれのビードコアを、円筒状に形成したカーカスバンドに対し、それの両端部分の外周側に設けられて、相互に向き合う方向に鈎状に折れ曲がるそれぞれの巻き回し部の間まで相対変位させ、次いで、両ビードホルダを、カーカスバンドの軸線方向外側へ変位させて、両ビードホルダの相互の対抗面、いいかえれば外面で、それぞれの巻き回し部を、カーカスバンドの軸線方向外側および半径方向外方の両方向に弾性的に押し広げ変形させ、その後、ビードホルダを半径方向外方へ退避変位させて、それの凸部で巻き回し部を半径方向外方へより大きく拡径変形させるとともに、ビードコアを巻き回し部の内側に残留させるにある。
この場合、好ましくは、ビードロック手段によってビードコアを位置決めロックした後、ビードホルダを退避変位させる。 Further, the method for setting the bead core according to the present invention includes a pair of bead holders, each of the annular bead cores held on the mutually facing surface side, that is, the inner surface side, with respect to the carcass band formed in a cylindrical shape, both end portions thereof. The two bead holders are displaced relative to each other in the axial direction of the carcass band so that the two bead holders are displaced relative to each other. On the other side, in other words, on the outer surface, each winding portion is elastically pushed and deformed in both the axially outward direction and the radially outward direction of the carcass band, and then the bead holder is retracted and displaced outward in the radial direction. In addition to deforming the winding portion with its convex portion to a larger diameter outward in the radial direction, the bead core is placed inside the winding portion. In to remain.
In this case, preferably, after the bead core is positioned and locked by the bead lock means, the bead holder is retracted and displaced.

この発明に係る装置では、一対のビードホルダの内面側にビードリングを磁気吸着等させた状態で、それらの両ビードホルダを、カーカスバンドのそれぞれの巻き回し部の間へ変位させ、続いて、両ビードホルダを、相互の離隔方向へ水平変位させて、各巻き回し部を弾性的に押し広げ変形させるに当り、好ましくは、前記凸部の作用下で、巻き回し部の端部分の、半径方向外方への拡径変形を誘導することにより、その端部分への、図５に示すような縮径変形の発生を防止して、巻き回し部端部分の外周側へのビードコアのセットのおそれを有効に取り除くことができる。   In the apparatus according to the present invention, in a state where the bead ring is magnetically attracted to the inner surface side of the pair of bead holders, both the bead holders are displaced between the respective winding portions of the carcass band, and subsequently, both the bead holders Are horizontally displaced in the direction of separation from each other, and each winding portion is elastically pushed and deformed, preferably under the action of the convex portion, radially outward of the end portion of the winding portion. By inducing the diameter expansion deformation to the end portion, it is possible to prevent the occurrence of the diameter reduction deformation at the end portion as shown in FIG. 5 and to effectively set the bead core on the outer peripheral side of the winding portion end portion. Can be removed.

しかも、この装置では、一対のビードホルダを相互の離隔限界位置まで水平変位させた後、それらを半径方向外方に退避変位させるに当って、巻き回し部の端縁より内周側に存在する、ビードホルダ外面の凸部の頂がその先端部分に掛合してそれを拡径変位させることになるので、巻き回し部の端部分に、図５に示すような縮径変形が生じることがあったとしても、また、巻き回し部の基部外面が、たとえ図6（ａ）に示すように、内周側部材に早期に接触することがあったとしても、巻き回し部端部分の、その後に続く十分な拡径変形を実現することができ、その結果として、ビードコアを、巻き回し部の内側に、図６（ｃ）に示すように適正に残留させることができる。   In addition, in this apparatus, after horizontally displacing the pair of bead holders to the mutual separation limit position, when they are retracted and displaced outward in the radial direction, they exist on the inner peripheral side from the edge of the winding part. Since the top of the convex portion of the outer surface of the bead holder engages with the tip portion and displaces the diameter thereof, the diameter reduction deformation as shown in FIG. 5 may occur at the end portion of the winding portion. Moreover, even if the base outer surface of the winding portion may come into contact with the inner peripheral side member at an early stage, as shown in FIG. As a result, the bead core can be appropriately left inside the wound portion as shown in FIG. 6 (c).

なおここで、ビードホルダ外面の凸部を、巻き回し部端縁の外径より半径方向の外方まで連続させて形成した場合には、それぞれのビードホルダの相互の離隔変位に基づいて、巻き回し部の端部分を常に確実に拡径変位させることができるので、図５に示すような縮径現象の発生をより確実に防止することができ、また、図６（ａ）に示すような、巻き回し部の基部外面の早期の接触を予め十分に防止することができる。   Here, when the convex part of the outer surface of the bead holder is formed continuously from the outer diameter of the winding part edge to the outside in the radial direction, the winding part is based on the mutual displacement of each bead holder. 5 can always be reliably expanded and displaced, so that the occurrence of the diameter reduction phenomenon as shown in FIG. 5 can be prevented more reliably, and the winding as shown in FIG. Early contact with the outer surface of the base portion of the turning portion can be sufficiently prevented in advance.

ところで、凸部を、ビードホルダの半径方向内端位置から０〜３０ｍｍｎの範囲内に形成した場合には、少なくとも、ビードホルダの退避変位に際する、巻き回し部端部分の拡径変形をより十分に行わせることができる。
また、ビードホルダの、カーカスバンドの半径方向外方への変位量は３０ｍｍ以下とすることが、装置の大型化を回避する上で好ましい。 By the way, when the convex portion is formed within the range of 0 to 30 mmn from the radial inner end position of the bead holder, at least the diameter-enlargement deformation of the winding portion end portion when the bead holder is retracted is more sufficiently. Can be done.
Further, the displacement amount of the bead holder in the radially outward direction of the carcass band is preferably 30 mm or less in order to avoid an increase in the size of the apparatus.

図１は、この発明に係る装置の実施形態を、円周方向の所定の角度間隔をおいて位置する複数本のフィンガ部材よりなるビードホルダを、一本のフィンガ部材に代表させて示す要部側面図であり、相互に同軸に配設してなる一対のビードホルダ１の一方を示すものである。   FIG. 1 is a side view of an essential part of an embodiment of an apparatus according to the present invention, in which a bead holder composed of a plurality of finger members positioned at a predetermined angular interval in the circumferential direction is represented by a single finger member. It is a figure and shows one side of a pair of bead holder 1 arrange | positioned coaxially mutually.

このビードホルダ１は、図に仮想線で示す円筒状のカーカスバンド２の外周側に折り曲げ形成されて軸線方向の中央部側へ鈎状に突出する巻き回し部３に対して所定の作業を行うものであり、カーカスバンド２の軸線方向の中央部側の面、すなわち内面４に、全体として円環状をなすビードコア５をそれ単独で、または、そこに貼着させたスティフナとともに、磁気吸着等によって保持する。   The bead holder 1 performs a predetermined operation on a winding portion 3 that is bent on the outer peripheral side of a cylindrical carcass band 2 indicated by phantom lines in the drawing and protrudes in a hook shape toward the center in the axial direction. The bead core 5 having an annular shape as a whole is held on the surface on the central side in the axial direction of the carcass band 2, that is, the inner surface 4 alone or together with a stiffener attached thereto by magnetic adsorption or the like To do.

ここでは、このようなビードホルダ１の、カーカスバンド２の軸線方向の外方側に向く外面６に、巻き回し部３に向けて三角山形状に突出する凸部７を設け、この凸部７の頂Ｐを、図示のような、ビードホルダ１による、巻き回し部３の押し広げ変形の開始直前のビードホルダ姿勢の下で、巻き回し部３の端縁Ｅより半径方向の内方に位置させる。
そしてより好ましくは、上記のビードホルダ姿勢において、凸部７を、図示のように、巻き回し部３の端縁Ｅの外径Ｄより半径方向の外方まで連続させて形成する。 Here, on the outer surface 6 of the bead holder 1 facing the outer side in the axial direction of the carcass band 2, a convex portion 7 protruding in a triangular mountain shape toward the winding portion 3 is provided. The apex P is positioned inward in the radial direction from the edge E of the winding portion 3 under the bead holder posture immediately before the start of the expansion deformation of the winding portion 3 by the bead holder 1 as illustrated.
More preferably, in the above bead holder posture, the convex portion 7 is formed continuously from the outer diameter D of the edge E of the winding portion 3 to the outer side in the radial direction as shown in the figure.

なお、多くの場合は、カーカスバンド１の本体部分８から、半径方向外方へ８〜１５ｍｍ離隔して位置することになる前記端縁Ｅを有する巻き回し部３に対しては、これも一般に、半径方向の内端をカーカスバンド本体部分８から１８〜２５ｍｍの範囲内に位置決めされるビードホルダ１の凸部７は、そのビードホルダ１の半径方向内端位置から０〜３０ｍｍの範囲内に形成することが好ましい。   In many cases, this is also generally applied to the winding portion 3 having the edge E that is positioned 8 to 15 mm radially outward from the main body portion 8 of the carcass band 1. The convex portion 7 of the bead holder 1 whose inner end in the radial direction is positioned within the range of 18 to 25 mm from the carcass band main body portion 8 is formed within the range of 0 to 30 mm from the position in the radial direction of the bead holder 1. It is preferable.

ところで、中心軸線方向の断面図で示す、図示のカーカスバンド１の巻き回し部３は、三個所の、１２０°ずつの折れ曲がり部をもって形成して、その巻き回し部３の端部分９を、カーカスバンド１の中心軸線と平行に延在させているも、巻き回し部３の折れ曲がり個所および角度、巻き回し部端部分の延在方向等は、セットされるビードコアの横断面形状、寸法、セット姿勢その他に基いて適宜に選択できることはもちろんである。   By the way, the winding portion 3 of the illustrated carcass band 1 shown in a sectional view in the central axis direction is formed with three bent portions of 120 ° each, and the end portion 9 of the winding portion 3 is formed as a carcass. Although it extends in parallel with the central axis of the band 1, the bending part and angle of the winding part 3, the extending direction of the end part of the winding part, etc. are the cross-sectional shape, dimensions, and setting posture of the bead core to be set. Of course, it can be selected as appropriate based on the others.

このように構成してなる装置によって、ビードコアを巻き回し部の内側にセットするに当っては、はじめに、内面４にビードコア５を保持した一対のビードホルダ１のそれぞれを、カーカスバンド２の両端部分の巻き回し部３間へ変位させ、次いで、各ビードホルダ１を、図２（ａ）、（ｂ）にその一方を例示するように、カーカスバンド１の、軸線方向の外側に向けて水平変位させて、その外面６に設けた凸部７の作用の下に、巻き回し部３を軸線方向外側および半径方向外方の両方向に弾性的に押し広げ変形させる。   In order to set the bead core inside the winding portion by the apparatus configured as described above, first, each of the pair of bead holders 1 holding the bead core 5 on the inner surface 4 is attached to both end portions of the carcass band 2. Displace between the winding parts 3 and then horizontally displace each bead holder 1 toward the outside in the axial direction of the carcass band 1 as illustrated in FIG. 2 (a) and (b). Under the action of the convex portion 7 provided on the outer surface 6, the winding portion 3 is elastically pushed and deformed in both the axially outer side and the radially outer side.

ここで、巻き回し部３のこのような押し広げ変形は、その巻き回し部３の端部分９が、図２（ａ）に示すように、端縁側が縮径する方向に傾斜する場合にあっても、凸部７の頂Ｐがその端縁Ｅより半径方向内方に存在する限りにおいて、常に円滑に、かつ確実に行われることになるので、従来技術で述べたように、ビードコア５が、巻き回し部端部分の外周側にセットされるおそれは十分に除去されることになる。   Here, such a spreading deformation of the winding portion 3 occurs when the end portion 9 of the winding portion 3 is inclined in a direction in which the end edge side is reduced in diameter as shown in FIG. However, as long as the apex P of the convex portion 7 exists radially inward from the edge E, it is always performed smoothly and reliably. The risk of being set on the outer peripheral side of the end portion of the winding portion is sufficiently removed.

ビードホルダ１を、それの限界位置まで水平変位させた後は、ビードコア５を、ビードロック手段をもって位置決めロックして、または、位置決めロックすることなしに、そのビードホルダ１を、図２（ｃ）に示すように、半径方向外方に退避変位させて、ビードコア５をそのロック位置等に拘束する一方で、巻き回し部を、ホルダ凸部７の、巻き回し部端部分９への掛合の下で、半径方向外方へより大きく拡径変位させる。   After the bead holder 1 is horizontally displaced to its limit position, the bead core 1 is shown in FIG. 2 (c) with the bead core 5 positioned or locked with bead lock means. Thus, while retracting and displacing outward in the radial direction, the bead core 5 is constrained to its locking position and the like, while the winding portion is under engagement with the winding portion end portion 9 of the holder convex portion 7, The diameter is displaced larger outward in the radial direction.

これによれば、ビードホルダ１の水平変位下で、巻き回し部３の基部１０の外面が、仮りに、従来技術で述べたように、内周側部材に早期に接触することがあっても、その接触は、結果的には、巻き回し部端部分９のこの大きな、拡径変形によって確実に解消されることになる。   According to this, even if the outer surface of the base portion 10 of the winding portion 3 may come into early contact with the inner circumferential side member as described in the prior art under the horizontal displacement of the bead holder 1, As a result, the contact is surely eliminated by this large diameter expansion deformation of the winding end portion 9.

従って、ビードホルダ１の退避変位の継続によって、それと巻き回し部端部分９との掛合が解かれ、その巻き回し部３が原形状に弾性復帰したときは、所定の位置に拘束されるビードコア５を所期した通りに適正に包み込むことができる。   Therefore, when the retracting displacement of the bead holder 1 is continued and the engagement between the end portion 9 and the winding portion end portion 9 is released, and the winding portion 3 is elastically restored to the original shape, the bead core 5 restrained at a predetermined position is removed. It can be wrapped properly as expected.

以上、ビードホルダ１の外面６に三角山形状の凸部７を設ける場合について説明したが、凸部は、側面視で、図３（ａ）に示すような曲線だけからなるものとすることもでき、また、直線と曲線との組み合わせになるものとすることもできる。   As described above, the case where the convex portion 7 having the triangular mountain shape is provided on the outer surface 6 of the bead holder 1 has been described. However, the convex portion may include only a curve as shown in FIG. It can also be a combination of straight lines and curves.

ところで、凸部の形成態様は、ビードホルダ１の外面６側へ絶対的に突出するものだけに限定されることなく、図３（ｂ）〜（ｅ）のそれぞれに例示するように、ビードホルダ１の中間部に形成した凹部１１より半径方向内方部分で、その凹部１１の底より外面６側へ相対的に突出する凸部１２とすることもできる。
なお、図３（ｅ）に示す例によっては、図５（ａ）に示すような縮径変形の発生を十分に防止することは困難となるも、ビードホルダ１の退避変位に際する、凸部１２による巻き回し部端部分の、図２（ｃ）の示すような拡径変形は常に確実に行われることになるので、この例によってもまた、ビードコア５を巻き回し部の内側に適正に残留させることができる。 By the way, the formation aspect of a convex part is not limited only to what protrudes to the outer surface 6 side of the bead holder 1, but as illustrated in each of FIG.3 (b)-(e), It can also be set as the convex part 12 which protrudes relatively to the outer surface 6 side from the bottom of the concave part 11 in the radially inner part from the concave part 11 formed in the intermediate part.
Note that, depending on the example shown in FIG. 3 (e), it may be difficult to sufficiently prevent the occurrence of the reduced diameter deformation as shown in FIG. Since the diameter-enlarged deformation as shown in FIG. 2C is always reliably performed at the end portion of the wound portion by 12, the bead core 5 remains properly inside the wound portion also in this example. Can be made.

この発明の実施例の形態を、一本のフィンガ部材に代表させて示す要部側面図である。It is a principal part side view which represents the form of the Example of this invention on behalf of one finger member. 図１に示す装置の作用を示す工程図である。It is process drawing which shows the effect | action of the apparatus shown in FIG. 他の実施形態を例示する要部側面図である。It is a principal part side view which illustrates other embodiment. 従来技術を示す軸線方向断面図である。It is an axial sectional view showing the prior art. 巻き回し部の押し広げ不全例を示す図である。It is a figure which shows the example of incomplete expansion of the winding part. 巻き回し部の他の押し広げ不全例および適正例を示す図である。It is a figure which shows the other example of an improper expansion of a winding part, and an appropriate example.

符号の説明Explanation of symbols

１ ビードホルダ
２ カーカスバンド
３ 巻き回し部
４ 内面
５ ビードコア
６ 外面
７ 凸部
８ 本体部分
９ 巻き回し部端部分
１０ 基部
１１ 凹部
Ｐ 頂
Ｅ 巻き回し部端縁 DESCRIPTION OF SYMBOLS 1 Bead holder 2 Carcass band 3 Winding part 4 Inner surface 5 Bead core 6 Outer surface 7 Convex part 8 Main body part 9 Winding part edge part 10 Base 11 Recessed part P Top E Winding part edge

Claims (5)

円筒状に形成されて、軸線方向の両端部分の外周側に、相互に向き合う方向に鈎状に折れ曲がる巻き回し部を有するカーカスバンドの、各巻き回し部の内側に円環状のビードコアをセットする装置であって、
ビードコアを保持して、カーカスバンドの軸線方向外側および半径方向外方に変位して、保持したビードコアを巻き回し部の内側に残留させる一対のビードホルダの、カーカスバンドの軸線方向外側の表面に、カーカスバンドの軸線方向外側への変位に際して、巻き回し部の端縁より半径方向の内側に頂をもつ凸部を設けてなるビードコアのセット装置。 An apparatus for setting an annular bead core inside each winding portion of a carcass band that is formed in a cylindrical shape and has winding portions that are bent in a hook shape in opposite directions on the outer peripheral side of both end portions in the axial direction. Because
A pair of bead holders that hold the bead core and are displaced outward in the axial direction and radially outward of the carcass band and remain inside the winding portion of the pair of bead holders on the outer surface in the axial direction of the carcass band. A bead core setting device provided with a convex portion having a peak on the inner side in the radial direction from the edge of the winding portion when the band is displaced outward in the axial direction. 凸部を、巻き回し部の端縁の外径より半径方向の外方まで連続させて形成してなる請求項１に記載のビードコアのセット装置。   The bead core setting device according to claim 1, wherein the convex portion is formed continuously from the outer diameter of the edge of the winding portion to the outer side in the radial direction. 凸部を、ビードホルダの半径方向内端位置から０〜３０ｍｍの範囲内に形成してなる請求項１もしくは２に記載のビードコアのセット装置。   The bead core setting device according to claim 1 or 2, wherein the convex portion is formed within a range of 0 to 30 mm from a radially inner end position of the bead holder. 一対のビードホルダで相互の対向面側に保持した円環状のそれぞれのビードコアを、円筒状に形成したカーカスバンドに対し、それの両端部分の外周側に設けられて、相互に向き合う方向に鈎上に折れ曲がるそれぞれの巻き回し部の間まで相対変位させ、次いで、両ビードホルダを、カーカスバンドの軸線方向外側へ変位させて、両ビードホルダの相互の対抗面で、それぞれの巻き回し部を、カーカスバンドの軸線方向外側および半径方向外方の両方向に弾性的に押し広げ変形させ、しかる後、ビードホルダを半径方向外方へ退避変位させて、それの凸部で、巻き回し部を半径方向外方へより大きく拡径変形させるとともに、ビードコアを巻き回し部の内側に残留させるビードコアのセット方法。   Each of the annular bead cores held by the pair of bead holders on the opposite surface side is provided on the outer peripheral side of both ends of the carcass band formed in a cylindrical shape, and is placed on the ridge in a direction facing each other. Relative displacement is made between the respective winding portions to be bent, and then both bead holders are displaced outward in the axial direction of the carcass band, and the respective winding portions are arranged on the axis of the carcass band at the opposing surfaces of both bead holders. Elastically pushes and deforms both outward and radially outward, and then the bead holder is retracted and displaced outward in the radial direction, so that the winding part becomes larger outward in the radial direction by the convex part thereof. A method of setting a bead core that causes the bead core to remain inside the wound portion while expanding the diameter. ビードロック手段によってビードコアを位置決めロックした後、ビードホルダを退避変位させる請求項４に記載のビードコアのセット方法。   The method for setting a bead core according to claim 4, wherein the bead holder is retracted and displaced after the bead core is positioned and locked by the bead lock means.
JP2005183377A 2005-06-23 2005-06-23 Bead core setting device and setting method Withdrawn JP2007001126A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008296553A (en) * 2007-06-04 2008-12-11 Bridgestone Corp Manufacturing method of tire and tire molding drum used therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008296553A (en) * 2007-06-04 2008-12-11 Bridgestone Corp Manufacturing method of tire and tire molding drum used therefor

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