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WO2010087165A1 - Appareil de formation de tringle et procédé de formation de tringle - Google Patents

Appareil de formation de tringle et procédé de formation de tringle Download PDF

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Publication number
WO2010087165A1
WO2010087165A1 PCT/JP2010/000467 JP2010000467W WO2010087165A1 WO 2010087165 A1 WO2010087165 A1 WO 2010087165A1 JP 2010000467 W JP2010000467 W JP 2010000467W WO 2010087165 A1 WO2010087165 A1 WO 2010087165A1
Authority
WO
WIPO (PCT)
Prior art keywords
bead
roller
pressing
bead core
pressing roller
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.)
Ceased
Application number
PCT/JP2010/000467
Other languages
English (en)
Japanese (ja)
Inventor
慎一郎 山崎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bridgestone Corp filed Critical Bridgestone Corp
Publication of WO2010087165A1 publication Critical patent/WO2010087165A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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)
    • B29D30/48—Bead-rings or bead-cores; Treatment thereof prior to building the tyre
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D07B1/0606—Reinforcing cords for rubber or plastic articles
    • D07B1/062—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
    • D07B7/02—Machine details; Auxiliary devices
    • D07B7/025—Preforming the wires or strands prior to closing
    • 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
    • B29D2030/487—Forming devices for manufacturing the beads
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2001—Wires or filaments
    • D07B2201/2002—Wires or filaments characterised by their cross-sectional shape
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2015—Strands
    • D07B2201/2033—Parallel wires
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2501/00—Application field
    • D07B2501/20—Application field related to ropes or cables
    • D07B2501/2046—Tyre cords
    • D07B2501/2053—Tyre cords for wheel rim attachment
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B5/00—Making ropes or cables from special materials or of particular form
    • D07B5/002—Making parallel wire strands
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
    • D07B7/02—Machine details; Auxiliary devices
    • D07B7/021—Guiding means for filaments, strands, ropes or cables
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
    • D07B7/16—Auxiliary apparatus
    • D07B7/165—Auxiliary apparatus for making slings

Definitions

  • the present invention relates to a bead core formed by winding one or a plurality of bead strands in an annular shape on a bead former, and in particular, each bead strand is between adjacent bead strands in the axial direction of the bead former.
  • the present invention relates to a bead core forming apparatus and a bead core forming method for forming a bead core having engaging portions that fit and engage with each other.
  • a bead core structure has been proposed in which the shape includes engaging portions 4 that fit and engage with each other between adjacent bead wires W in the width direction.
  • the bottom side of the bead core B has the same taper with respect to the tire width direction. It is preferable to set the angle (angle ⁇ ), but in this case, it is necessary to apply a taper brazing to the bead element itself to the taper angle of the bead sheet of the rim R.
  • the taper brazing of the bead strand itself uses a plurality of rollers (deformation units), and the width direction (bead former) is applied to the bead strand fed to the bead former. It is possible to perform brazing that bends in the axial direction of
  • the bead wire W (see FIG. 1) having the special shape (engagement portion 4) as described above is sandwiched between a plurality of rollers having a flat roller surface and brazed. Then, the pressing force from the roller concentrates on the engaging portion and the engaging portion is crushed or the bead strand moves up and down on the roller surface and twists. It was difficult to apply.
  • Such non-uniform brazing also causes the problem of turbulence of the bead strands when wound around the bead former.
  • the present invention provides a bead core forming apparatus capable of uniformly tapering bead strands having engaging portions that fit and engage with each other between bead strands adjacent in the width direction.
  • the main object is to provide a method for forming a bead core.
  • a bead core forming apparatus is a bead core formed by winding one or a plurality of bead strands in an annular shape on a bead former, and the bead strands
  • a bead core forming apparatus for forming a bead core having engaging portions that engage with each other between bead strands adjacent to each other in the axial direction of the bead former, at least two first presses arranged on the same straight line
  • a bead element wire having a roller and a second pressing roller disposed between the first pressing rollers and shifted in a direction perpendicular to the straight line, and supplying the bead wire to the bead former.
  • a brazing mechanism that brazes the bead element wire in the axial direction by being sandwiched while applying a pressing force in the axial direction by the pressing roller and the second pressing roller; 1 of the pressing roller and the second pressing roller is characterized in that it has with their roller surface to the outer surface contour of the bead wires corresponding shape grooves respectively.
  • the “brazing in the axial direction” of the bead wire here means that the bead former extends straight in a tensioned state while being tensioned, but in the natural shape where no tension is applied, in the axial direction of the bead former. It means a brazing that curves, and more specifically means a brazing in which the radius of curvature along the axial direction differs between one side and the other side of the bead element in the width direction.
  • the bead element wire can be prevented from being crushed and the bead element wire from being twisted at the time of brazing by the brazing mechanism. Brazing can be performed, and a highly accurate bead core without turbulence can be stably formed.
  • the bead core forming apparatus of the present invention includes an auxiliary roller that presses the bead element wire against at least one of the first pressing roller and the second pressing roller, and the auxiliary roller is disposed on the surface of the bead. It is preferable to have the groove part of the shape corresponding to the outer surface outline shape of a strand.
  • the bead core forming method of the present invention is a bead core formed by winding one or a plurality of bead strands on a bead former in an annular shape.
  • a bead core forming method for forming a bead core having an engaging portion that engages with each other between bead strands adjacent to each other in the axial direction of the bead former, at least two first lines arranged on the same straight line
  • a first pressing roller having a groove corresponding to the outer contour shape of the bead element wire on the roller surface, and a vertical direction with respect to the straight line between the first pressing rollers.
  • a second pressing roller arranged in a shifted manner and a second pressing roller having a groove portion having a shape corresponding to the outer surface contour shape of the bead element wire on the roller surface.
  • a bead core forming apparatus capable of uniformly tapering bead strands having engaging portions that fit and engage with each other between adjacent bead strands in the width direction, and A bead core molding method can be provided.
  • FIG. 1 is a cross-sectional view along the tire width direction showing a bead portion of a pneumatic tire having a bead core formed by application of the present invention together with a compatible rim.
  • FIG. 2 is a cross-sectional view in the width direction of another bead core exemplifying a bead strand targeted by the present invention.
  • FIG. 3 is a schematic perspective view showing a bead core forming apparatus according to an embodiment of the present invention.
  • FIG. 4 is a plan view of a brazing mechanism in the bead core forming apparatus of FIG.
  • FIG. 5 is a cross-sectional view taken along the line II of FIG.
  • FIG. 6A and 6B are diagrams schematically showing the natural shape of the bead wire brazed by the brazing mechanism, where FIG. 6A is a plan view, and FIG. 6B is a cross-sectional view taken along line II- in FIG. It is sectional drawing along the II line.
  • FIG. 7 is a cross-sectional view taken along line III-III in FIG.
  • FIG. 8 is a cross-sectional view showing another brazing mechanism applicable to the present invention in the same cross section as FIG.
  • a tire including a bead core B formed by a bead core forming apparatus F to be described later to which the present invention is applied is a pneumatic radial tire mainly made of rubber, and fitted to a rim R of a wheel.
  • a pair of bead portions 1 to be joined, a tread portion (not shown) contacting the road surface, a pair of sidewall portions (not shown) extending outward from each bead portion 1 in the radial direction of the tire and continuing to the tread portion, and a toroidal carcass 3 is provided.
  • the bead core B is formed by annularly winding a plurality of bead strands W arranged in parallel in the tire width direction.
  • the bottom side of the bead core B is inclined at a predetermined angle ⁇ with respect to the tire width direction (axial direction).
  • Each bead strand W has an engaging portion 4 that fits and engages with each other between the bead strands W adjacent in the tire width direction.
  • the cross-sectional shape of the bead wire W is not limited to the example of FIG. 1, and as illustrated in FIG. 2, a cross-sectional parallelogram (FIG. 2A) and a shape having a step on the side surface in the width direction (FIG. 2).
  • the cross-sectional shape as a whole of the bead core B is a parallelogram in this embodiment, it may be a polygon other than a rectangle or a rectangle.
  • the bead core forming device F that forms the bead core B has a bead core forming concave groove 11 on the outer periphery thereof, and a bead former 12 that is driven and rotated by a motor (not shown), and the bead former 12 and a feeding spool.
  • brazing mechanism 13 that applies a predetermined brazing to each bead wire W prior to winding around the bead former 12.
  • guide pins 14 and 15 are provided for guiding the bead strand W sent to the brazing mechanism 13 in a direction parallel to the tangential direction of the bead former 12.
  • the five bead wires W respectively fed from the feeding spool 10 are wound around the concave groove 11 of the bead former 12 after being subjected to predetermined brazing by the brazing mechanism 13.
  • the brazing mechanism 13 includes two first pressing rollers 17 that are arranged on the same straight line P, that is, at intervals along the longitudinal direction of the bead strand W to be brazed. , 18 and a second pressing roller 19 disposed between the first pressing rollers 17 and 18 with a distance d shifted in the direction perpendicular to the straight line P. That is, the first pressing rollers 17 and 18 and the second pressing roller are arranged in a triangular shape on the same plane.
  • the second pressing roller 19 applies a pressing force to the bead strand W from the side opposite to the side where the first pressing roller 17 or 18 and the bead strand W are in contact with each other, and performs brazing.
  • Each pressing roller 17, 18, 19 is rotatably supported by a shaft portion standing on the base of each brazing mechanism 13.
  • the distance d is set to a distance at which a predetermined pressing force is applied to the bead strand W when the bead strand W is passed between the first press rollers 17 and 18 and the second press roller 19. That is, if the distance d is decreased, the pressing force is increased. Conversely, if the distance d is increased, the pressing force is decreased.
  • the brazing mechanism 13 reliably presses the bead wire W passing between the first and second pressing rollers 17, 18, 19 against the first and second pressing rollers 17, 18, 19.
  • the auxiliary roller that freely rotates together with the pressing rollers 17, 18, 19 and stably passes the bead wire W to be brazed between the first pressing rollers 17, 18 and the second pressing roller 19. 20, 21, 22.
  • the auxiliary roller 20 is disposed so as to be opposed to the first pressing roller 17 in the direction perpendicular to the straight line P, and the bead element wire W is arranged between the pressing roller 17 and the auxiliary roller 20. I try to pinch it.
  • the auxiliary roller 21 is disposed so as to face the other first pressing roller 18 in a direction perpendicular to the straight line P, and the bead element wire W is arranged between the other first pressing roller 18 and the auxiliary roller 21. I try to pinch it.
  • the auxiliary roller 22 is disposed so as to be opposed to the second pressing roller 19 in a direction perpendicular to the straight line P, and the bead wire W is sandwiched between the second pressing roller 19 and the auxiliary roller 22.
  • the auxiliary rollers 20, 21, and 22 are also rotatably supported by shaft portions that are erected on the base of each brazing mechanism 13, similarly to the pressure rollers 17, 18, and 19.
  • the bead strand W to be brazed is placed between the first pressing roller 17 and the auxiliary roller 20, between the first pressing roller 18 and the auxiliary roller 21, and between the second pressing roller 19 and the auxiliary roller.
  • the bead strand W can be stably passed and uniform brazing can be performed.
  • each bead wire W fed from each feed spool 10 is meshed with the first pressing rollers 17 and 18 and the second pressing roller 19, that is, the first By applying a pressing force in the axial direction X with the pressing rollers 17 and 18 and the second pressing roller 19 and pulling it out while applying tension, each bead wire W is brazed in the plane along the axial direction X. I do.
  • a plurality of (here, five) bead strands W that have passed through the brazing mechanisms 13 while rotating the bead former 12 by a motor are arranged in parallel in the axial direction X. It winds in the concave groove 11 of the former 12.
  • each bead wire W that has been brazed and wound around the bead former 12 in an annular shape is wound in a state inclined by ⁇ degrees on the bead former 12.
  • the bead element wire W brazed to bend in the axial direction X of the bead former 12 has one side S1 and the other side of the bead element wire W in the width direction.
  • a first bead strand L1 is formed in which the bottom of each bead strand W is inclined at an angle ⁇ with respect to the axial direction X (tire width direction). .
  • the second row, the third row, the second row, and the nth row are sequentially formed by winding the second row of bead strands on the first row of bead strands L1.
  • the molding of the bead core B is completed.
  • the outer surface contour shape including the engaging portion 4 of the bead wire W and the first and second presses since the shape of the grooves 17g, 18g, and 19g provided on the roller surfaces 17s, 18s, and 19s of the rollers 17, 18, and 19 fits, the pressing force is concentrated and the engaging portion 4 of the bead wire W is crushed. In addition, there is no risk of the bead strand W moving up and down on the roller surface and twisting, and the bead strand W can be evenly brazed and thus has a high precision bead core B with no winding disturbance. Can be formed stably.
  • the bead strand W at the time of brazing is provided. Can be further suppressed, and a bead core B with higher accuracy can be stably formed.
  • the bead element wire W as shown in FIG. 2 can be manufactured in addition to the bead element wire W shown in FIG. 1, and in that case, a part thereof is illustrated in FIG.
  • a pressing roller having a groove portion having a shape that matches the outer surface contour shape of the bead wire W.
  • the present invention can also be suitably applied to a bead element wire having a more complicated cross-sectional shape than the bead element wire W of FIGS.
  • the bead core may be formed in a rectangular shape as a whole by aligning and laminating both ends of each bead element wire W, and both ends of each bead element wire W. It is good also as a parallelogram shape as a whole by laminating
  • at least one of the first pressing rollers 17 and 18 and the second pressing roller 19 is set in a direction perpendicular to the straight line P connecting the first pressing rollers 17 and 18. It is preferable to provide a driving means for the pressing roller that relatively moves the pressing rollers 17, 18, and 19 to increase or decrease the distance d (see FIG. 4). According to this, since the pressing force by the pressing roller can be freely changed via the driving means, a taper angle according to the desired can be easily given to each bead element wire W.
  • the bead core when a bead core is formed using bead strands having engaging portions that fit and engage with each other between adjacent bead strands in the tire width direction, the bead core is high without causing turbulence. It became possible to mold with accuracy.

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

Abstract

La présente invention concerne un appareil de formation de tringle et un procédé de formation de tringle capable d'appliquer un profil de conicité uniforme aux fils d'acier de la tringle présentant des parties d'accrochage qui correspondent et s'accrochent mutuellement avec des parties d'engagement d'autres fils d'acier de tringle adjacents dans le sens de la largeur. L'appareil de formation de tringle (F) comporte un mécanisme de façonnage muni d'au moins deux premiers cylindres presseurs (17, 18) disposés sur une ligne droite commune (P), et un second cylindre presseur (19) disposé entre les premiers cylindres presseurs (17, 18) pour être dévié dans une direction perpendiculaire par rapport à la ligne droite (P) pour retenir un fil d'acier de tringle (W) alimenté au dispositif de formation de tringle (12) entre les premier cylindres presseurs (17, 18) et le second cylindre presseur (19) tout en appliquant une force de pressage dans la direction axiale (X), et façonner la fil d'acier de tringle (W) dans la direction axiale (X). Les premier cylindres presseurs (17, 18) et le second cylindre presseur (19) sont munis respectivement sur leurs surfaces de cylindres de rainures (17g, 18g, 19g) dont les formes correspondent à une forme de contour de surface extérieure du fil d'acier de tringle (W).
PCT/JP2010/000467 2009-01-28 2010-01-27 Appareil de formation de tringle et procédé de formation de tringle Ceased WO2010087165A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009017214 2009-01-28
JP2009-017214 2009-01-28

Publications (1)

Publication Number Publication Date
WO2010087165A1 true WO2010087165A1 (fr) 2010-08-05

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PCT/JP2010/000467 Ceased WO2010087165A1 (fr) 2009-01-28 2010-01-27 Appareil de formation de tringle et procédé de formation de tringle

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016203185A (ja) * 2015-04-16 2016-12-08 住友ゴム工業株式会社 ビードコア成形装置およびビードコア成形方法
JP2022112112A (ja) * 2021-01-21 2022-08-02 横浜ゴム株式会社 ビードコアの製造装置および方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4166492A (en) * 1976-11-25 1979-09-04 Otto Kuhlmann Gmbh & Co. Method of producing an annular bead core assembly for a pneumatic tire
JPS5823524A (ja) * 1981-07-31 1983-02-12 Tokusen Kogyo Kk 縦型ビ−ドリングの製造方法およびその製造装置
US4406317A (en) * 1980-12-18 1983-09-27 Otto Kuhlmann Gmbh & Co. Pneumatic tire of vehicle, wire core for use therein and apparatus for producing said wire core
JPS60154832A (ja) * 1984-01-23 1985-08-14 Sumitomo Electric Ind Ltd 異形素線の撚線装置
WO2008143288A1 (fr) * 2007-05-21 2008-11-27 Bridgestone Corporation Pneu

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4166492A (en) * 1976-11-25 1979-09-04 Otto Kuhlmann Gmbh & Co. Method of producing an annular bead core assembly for a pneumatic tire
US4406317A (en) * 1980-12-18 1983-09-27 Otto Kuhlmann Gmbh & Co. Pneumatic tire of vehicle, wire core for use therein and apparatus for producing said wire core
JPS5823524A (ja) * 1981-07-31 1983-02-12 Tokusen Kogyo Kk 縦型ビ−ドリングの製造方法およびその製造装置
JPS60154832A (ja) * 1984-01-23 1985-08-14 Sumitomo Electric Ind Ltd 異形素線の撚線装置
WO2008143288A1 (fr) * 2007-05-21 2008-11-27 Bridgestone Corporation Pneu

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016203185A (ja) * 2015-04-16 2016-12-08 住友ゴム工業株式会社 ビードコア成形装置およびビードコア成形方法
JP2022112112A (ja) * 2021-01-21 2022-08-02 横浜ゴム株式会社 ビードコアの製造装置および方法
JP7617387B2 (ja) 2021-01-21 2025-01-20 横浜ゴム株式会社 ビードコアの製造装置および方法

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